diff --git a/BUILD b/BUILD
index 0a74f3b9681ae1b0126a3f7635543bc46f83c019..32059c0e94146c9f2e646765f618a0c4bf1a3453 100644
--- a/BUILD
+++ b/BUILD
@@ -135,20 +135,17 @@ cc_library(
     "include/grpc/support/tls_msvc.h",
     "include/grpc/support/tls_pthread.h",
     "include/grpc/support/useful.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
   ],
   includes = [
     "include",
@@ -516,27 +513,23 @@ cc_library(
     "include/grpc/grpc_posix.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/status.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
     "include/grpc/impl/codegen/compression_types.h",
     "include/grpc/impl/codegen/connectivity_state.h",
     "include/grpc/impl/codegen/grpc_types.h",
     "include/grpc/impl/codegen/propagation_bits.h",
     "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc/grpc_security.h",
     "include/grpc/census.h",
   ],
@@ -875,27 +868,23 @@ cc_library(
     "include/grpc/grpc_posix.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/status.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
     "include/grpc/impl/codegen/compression_types.h",
     "include/grpc/impl/codegen/connectivity_state.h",
     "include/grpc/impl/codegen/grpc_types.h",
     "include/grpc/impl/codegen/propagation_bits.h",
     "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc/grpc_cronet.h",
     "include/grpc/grpc_security.h",
   ],
@@ -1214,27 +1203,23 @@ cc_library(
     "include/grpc/grpc_posix.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/status.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
     "include/grpc/impl/codegen/compression_types.h",
     "include/grpc/impl/codegen/connectivity_state.h",
     "include/grpc/impl/codegen/grpc_types.h",
     "include/grpc/impl/codegen/propagation_bits.h",
     "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc/census.h",
   ],
   includes = [
@@ -1524,27 +1509,23 @@ cc_library(
     "include/grpc/grpc_posix.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/status.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
     "include/grpc/impl/codegen/compression_types.h",
     "include/grpc/impl/codegen/connectivity_state.h",
     "include/grpc/impl/codegen/grpc_types.h",
     "include/grpc/impl/codegen/propagation_bits.h",
     "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc++/impl/codegen/async_stream.h",
     "include/grpc++/impl/codegen/async_unary_call.h",
     "include/grpc++/impl/codegen/call.h",
@@ -1568,6 +1549,7 @@ cc_library(
     "include/grpc++/impl/codegen/service_type.h",
     "include/grpc++/impl/codegen/status.h",
     "include/grpc++/impl/codegen/status_code_enum.h",
+    "include/grpc++/impl/codegen/status_helper.h",
     "include/grpc++/impl/codegen/string_ref.h",
     "include/grpc++/impl/codegen/stub_options.h",
     "include/grpc++/impl/codegen/sync.h",
@@ -1627,6 +1609,7 @@ cc_library(
     "include/grpc++/impl/codegen/service_type.h",
     "include/grpc++/impl/codegen/status.h",
     "include/grpc++/impl/codegen/status_code_enum.h",
+    "include/grpc++/impl/codegen/status_helper.h",
     "include/grpc++/impl/codegen/string_ref.h",
     "include/grpc++/impl/codegen/stub_options.h",
     "include/grpc++/impl/codegen/sync.h",
@@ -1634,27 +1617,23 @@ cc_library(
     "include/grpc++/impl/codegen/sync_no_cxx11.h",
     "include/grpc++/impl/codegen/sync_stream.h",
     "include/grpc++/impl/codegen/time.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
     "include/grpc/impl/codegen/compression_types.h",
     "include/grpc/impl/codegen/connectivity_state.h",
     "include/grpc/impl/codegen/grpc_types.h",
     "include/grpc/impl/codegen/propagation_bits.h",
     "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc++/impl/codegen/config_protobuf.h",
   ],
   includes = [
@@ -1931,27 +1910,23 @@ cc_library(
     "include/grpc/grpc_posix.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/status.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
     "include/grpc/impl/codegen/compression_types.h",
     "include/grpc/impl/codegen/connectivity_state.h",
     "include/grpc/impl/codegen/grpc_types.h",
     "include/grpc/impl/codegen/propagation_bits.h",
     "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc++/impl/codegen/async_stream.h",
     "include/grpc++/impl/codegen/async_unary_call.h",
     "include/grpc++/impl/codegen/call.h",
@@ -1975,6 +1950,7 @@ cc_library(
     "include/grpc++/impl/codegen/service_type.h",
     "include/grpc++/impl/codegen/status.h",
     "include/grpc++/impl/codegen/status_code_enum.h",
+    "include/grpc++/impl/codegen/status_helper.h",
     "include/grpc++/impl/codegen/string_ref.h",
     "include/grpc++/impl/codegen/stub_options.h",
     "include/grpc++/impl/codegen/sync.h",
@@ -2134,20 +2110,17 @@ objc_library(
     "include/grpc/support/tls_msvc.h",
     "include/grpc/support/tls_pthread.h",
     "include/grpc/support/useful.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "src/core/lib/profiling/timers.h",
     "src/core/lib/support/backoff.h",
     "src/core/lib/support/block_annotate.h",
@@ -2371,27 +2344,23 @@ objc_library(
     "include/grpc/grpc_posix.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/status.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
     "include/grpc/impl/codegen/byte_buffer_reader.h",
     "include/grpc/impl/codegen/compression_types.h",
     "include/grpc/impl/codegen/connectivity_state.h",
     "include/grpc/impl/codegen/grpc_types.h",
     "include/grpc/impl/codegen/propagation_bits.h",
     "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
     "include/grpc/impl/codegen/atm_gcc_sync.h",
     "include/grpc/impl/codegen/atm_windows.h",
-    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/gpr_types.h",
     "include/grpc/impl/codegen/port_platform.h",
     "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
     "include/grpc/impl/codegen/sync.h",
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc/grpc_security.h",
     "include/grpc/census.h",
     "src/core/lib/channel/channel_args.h",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9960702c2064e18f16727d32cb862230c64e6ea9..ddf393441b37dc0ca0c72608e2699c0f4ab38659 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -258,20 +258,17 @@ foreach(_hdr
   include/grpc/support/tls_msvc.h
   include/grpc/support/tls_pthread.h
   include/grpc/support/useful.h
-  include/grpc/impl/codegen/alloc.h
   include/grpc/impl/codegen/atm.h
   include/grpc/impl/codegen/atm_gcc_atomic.h
   include/grpc/impl/codegen/atm_gcc_sync.h
   include/grpc/impl/codegen/atm_windows.h
-  include/grpc/impl/codegen/log.h
+  include/grpc/impl/codegen/gpr_types.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/slice.h
-  include/grpc/impl/codegen/slice_buffer.h
   include/grpc/impl/codegen/sync.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
   include/grpc/impl/codegen/sync_windows.h
-  include/grpc/impl/codegen/time.h
 )
   string(REPLACE "include/" "" _path ${_hdr})
   get_filename_component(_path ${_path} PATH)
@@ -508,27 +505,23 @@ foreach(_hdr
   include/grpc/grpc_posix.h
   include/grpc/grpc_security_constants.h
   include/grpc/status.h
-  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
   include/grpc/impl/codegen/grpc_types.h
   include/grpc/impl/codegen/propagation_bits.h
   include/grpc/impl/codegen/status.h
-  include/grpc/impl/codegen/alloc.h
   include/grpc/impl/codegen/atm.h
   include/grpc/impl/codegen/atm_gcc_atomic.h
   include/grpc/impl/codegen/atm_gcc_sync.h
   include/grpc/impl/codegen/atm_windows.h
-  include/grpc/impl/codegen/log.h
+  include/grpc/impl/codegen/gpr_types.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/slice.h
-  include/grpc/impl/codegen/slice_buffer.h
   include/grpc/impl/codegen/sync.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
   include/grpc/impl/codegen/sync_windows.h
-  include/grpc/impl/codegen/time.h
   include/grpc/grpc_security.h
   include/grpc/census.h
 )
@@ -739,27 +732,23 @@ foreach(_hdr
   include/grpc/grpc_posix.h
   include/grpc/grpc_security_constants.h
   include/grpc/status.h
-  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
   include/grpc/impl/codegen/grpc_types.h
   include/grpc/impl/codegen/propagation_bits.h
   include/grpc/impl/codegen/status.h
-  include/grpc/impl/codegen/alloc.h
   include/grpc/impl/codegen/atm.h
   include/grpc/impl/codegen/atm_gcc_atomic.h
   include/grpc/impl/codegen/atm_gcc_sync.h
   include/grpc/impl/codegen/atm_windows.h
-  include/grpc/impl/codegen/log.h
+  include/grpc/impl/codegen/gpr_types.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/slice.h
-  include/grpc/impl/codegen/slice_buffer.h
   include/grpc/impl/codegen/sync.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
   include/grpc/impl/codegen/sync_windows.h
-  include/grpc/impl/codegen/time.h
   include/grpc/grpc_cronet.h
   include/grpc/grpc_security.h
 )
@@ -967,27 +956,23 @@ foreach(_hdr
   include/grpc/grpc_posix.h
   include/grpc/grpc_security_constants.h
   include/grpc/status.h
-  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
   include/grpc/impl/codegen/grpc_types.h
   include/grpc/impl/codegen/propagation_bits.h
   include/grpc/impl/codegen/status.h
-  include/grpc/impl/codegen/alloc.h
   include/grpc/impl/codegen/atm.h
   include/grpc/impl/codegen/atm_gcc_atomic.h
   include/grpc/impl/codegen/atm_gcc_sync.h
   include/grpc/impl/codegen/atm_windows.h
-  include/grpc/impl/codegen/log.h
+  include/grpc/impl/codegen/gpr_types.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/slice.h
-  include/grpc/impl/codegen/slice_buffer.h
   include/grpc/impl/codegen/sync.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
   include/grpc/impl/codegen/sync_windows.h
-  include/grpc/impl/codegen/time.h
   include/grpc/census.h
 )
   string(REPLACE "include/" "" _path ${_hdr})
@@ -1206,27 +1191,23 @@ foreach(_hdr
   include/grpc/grpc_posix.h
   include/grpc/grpc_security_constants.h
   include/grpc/status.h
-  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
   include/grpc/impl/codegen/grpc_types.h
   include/grpc/impl/codegen/propagation_bits.h
   include/grpc/impl/codegen/status.h
-  include/grpc/impl/codegen/alloc.h
   include/grpc/impl/codegen/atm.h
   include/grpc/impl/codegen/atm_gcc_atomic.h
   include/grpc/impl/codegen/atm_gcc_sync.h
   include/grpc/impl/codegen/atm_windows.h
-  include/grpc/impl/codegen/log.h
+  include/grpc/impl/codegen/gpr_types.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/slice.h
-  include/grpc/impl/codegen/slice_buffer.h
   include/grpc/impl/codegen/sync.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
   include/grpc/impl/codegen/sync_windows.h
-  include/grpc/impl/codegen/time.h
   include/grpc++/impl/codegen/async_stream.h
   include/grpc++/impl/codegen/async_unary_call.h
   include/grpc++/impl/codegen/call.h
@@ -1250,6 +1231,7 @@ foreach(_hdr
   include/grpc++/impl/codegen/service_type.h
   include/grpc++/impl/codegen/status.h
   include/grpc++/impl/codegen/status_code_enum.h
+  include/grpc++/impl/codegen/status_helper.h
   include/grpc++/impl/codegen/string_ref.h
   include/grpc++/impl/codegen/stub_options.h
   include/grpc++/impl/codegen/sync.h
@@ -1323,6 +1305,7 @@ foreach(_hdr
   include/grpc++/impl/codegen/service_type.h
   include/grpc++/impl/codegen/status.h
   include/grpc++/impl/codegen/status_code_enum.h
+  include/grpc++/impl/codegen/status_helper.h
   include/grpc++/impl/codegen/string_ref.h
   include/grpc++/impl/codegen/stub_options.h
   include/grpc++/impl/codegen/sync.h
@@ -1330,27 +1313,23 @@ foreach(_hdr
   include/grpc++/impl/codegen/sync_no_cxx11.h
   include/grpc++/impl/codegen/sync_stream.h
   include/grpc++/impl/codegen/time.h
-  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
   include/grpc/impl/codegen/grpc_types.h
   include/grpc/impl/codegen/propagation_bits.h
   include/grpc/impl/codegen/status.h
-  include/grpc/impl/codegen/alloc.h
   include/grpc/impl/codegen/atm.h
   include/grpc/impl/codegen/atm_gcc_atomic.h
   include/grpc/impl/codegen/atm_gcc_sync.h
   include/grpc/impl/codegen/atm_windows.h
-  include/grpc/impl/codegen/log.h
+  include/grpc/impl/codegen/gpr_types.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/slice.h
-  include/grpc/impl/codegen/slice_buffer.h
   include/grpc/impl/codegen/sync.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
   include/grpc/impl/codegen/sync_windows.h
-  include/grpc/impl/codegen/time.h
   include/grpc++/impl/codegen/config_protobuf.h
 )
   string(REPLACE "include/" "" _path ${_hdr})
@@ -1563,27 +1542,23 @@ foreach(_hdr
   include/grpc/grpc_posix.h
   include/grpc/grpc_security_constants.h
   include/grpc/status.h
-  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
   include/grpc/impl/codegen/grpc_types.h
   include/grpc/impl/codegen/propagation_bits.h
   include/grpc/impl/codegen/status.h
-  include/grpc/impl/codegen/alloc.h
   include/grpc/impl/codegen/atm.h
   include/grpc/impl/codegen/atm_gcc_atomic.h
   include/grpc/impl/codegen/atm_gcc_sync.h
   include/grpc/impl/codegen/atm_windows.h
-  include/grpc/impl/codegen/log.h
+  include/grpc/impl/codegen/gpr_types.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/slice.h
-  include/grpc/impl/codegen/slice_buffer.h
   include/grpc/impl/codegen/sync.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
   include/grpc/impl/codegen/sync_windows.h
-  include/grpc/impl/codegen/time.h
   include/grpc++/impl/codegen/async_stream.h
   include/grpc++/impl/codegen/async_unary_call.h
   include/grpc++/impl/codegen/call.h
@@ -1607,6 +1582,7 @@ foreach(_hdr
   include/grpc++/impl/codegen/service_type.h
   include/grpc++/impl/codegen/status.h
   include/grpc++/impl/codegen/status_code_enum.h
+  include/grpc++/impl/codegen/status_helper.h
   include/grpc++/impl/codegen/string_ref.h
   include/grpc++/impl/codegen/stub_options.h
   include/grpc++/impl/codegen/sync.h
diff --git a/Makefile b/Makefile
index 98fb87e1f96be85be71d5ff1e1e5196c68a9391a..9bf73be537d2bd74b0ec5033f8f35d79a12382fc 100644
--- a/Makefile
+++ b/Makefile
@@ -2434,20 +2434,17 @@ PUBLIC_HEADERS_C += \
     include/grpc/support/tls_msvc.h \
     include/grpc/support/tls_pthread.h \
     include/grpc/support/useful.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
 
 LIBGPR_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGPR_SRC))))
 
@@ -2712,27 +2709,23 @@ PUBLIC_HEADERS_C += \
     include/grpc/grpc_posix.h \
     include/grpc/grpc_security_constants.h \
     include/grpc/status.h \
-    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
     include/grpc/impl/codegen/grpc_types.h \
     include/grpc/impl/codegen/propagation_bits.h \
     include/grpc/impl/codegen/status.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc/grpc_security.h \
     include/grpc/census.h \
 
@@ -2962,27 +2955,23 @@ PUBLIC_HEADERS_C += \
     include/grpc/grpc_posix.h \
     include/grpc/grpc_security_constants.h \
     include/grpc/status.h \
-    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
     include/grpc/impl/codegen/grpc_types.h \
     include/grpc/impl/codegen/propagation_bits.h \
     include/grpc/impl/codegen/status.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc/grpc_cronet.h \
     include/grpc/grpc_security.h \
 
@@ -3155,27 +3144,23 @@ PUBLIC_HEADERS_C += \
     include/grpc/grpc_posix.h \
     include/grpc/grpc_security_constants.h \
     include/grpc/status.h \
-    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
     include/grpc/impl/codegen/grpc_types.h \
     include/grpc/impl/codegen/propagation_bits.h \
     include/grpc/impl/codegen/status.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
 
 LIBGRPC_TEST_UTIL_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_TEST_UTIL_SRC))))
 
@@ -3419,27 +3404,23 @@ PUBLIC_HEADERS_C += \
     include/grpc/grpc_posix.h \
     include/grpc/grpc_security_constants.h \
     include/grpc/status.h \
-    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
     include/grpc/impl/codegen/grpc_types.h \
     include/grpc/impl/codegen/propagation_bits.h \
     include/grpc/impl/codegen/status.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc/census.h \
 
 LIBGRPC_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_UNSECURE_SRC))))
@@ -3738,27 +3719,23 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/grpc_posix.h \
     include/grpc/grpc_security_constants.h \
     include/grpc/status.h \
-    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
     include/grpc/impl/codegen/grpc_types.h \
     include/grpc/impl/codegen/propagation_bits.h \
     include/grpc/impl/codegen/status.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc++/impl/codegen/async_stream.h \
     include/grpc++/impl/codegen/async_unary_call.h \
     include/grpc++/impl/codegen/call.h \
@@ -3782,6 +3759,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/service_type.h \
     include/grpc++/impl/codegen/status.h \
     include/grpc++/impl/codegen/status_code_enum.h \
+    include/grpc++/impl/codegen/status_helper.h \
     include/grpc++/impl/codegen/string_ref.h \
     include/grpc++/impl/codegen/stub_options.h \
     include/grpc++/impl/codegen/sync.h \
@@ -3887,6 +3865,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/service_type.h \
     include/grpc++/impl/codegen/status.h \
     include/grpc++/impl/codegen/status_code_enum.h \
+    include/grpc++/impl/codegen/status_helper.h \
     include/grpc++/impl/codegen/string_ref.h \
     include/grpc++/impl/codegen/stub_options.h \
     include/grpc++/impl/codegen/sync.h \
@@ -3894,27 +3873,23 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/sync_no_cxx11.h \
     include/grpc++/impl/codegen/sync_stream.h \
     include/grpc++/impl/codegen/time.h \
-    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
     include/grpc/impl/codegen/grpc_types.h \
     include/grpc/impl/codegen/propagation_bits.h \
     include/grpc/impl/codegen/status.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc++/impl/codegen/config_protobuf.h \
 
 LIBGRPC++_REFLECTION_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_REFLECTION_SRC))))
@@ -4114,6 +4089,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/service_type.h \
     include/grpc++/impl/codegen/status.h \
     include/grpc++/impl/codegen/status_code_enum.h \
+    include/grpc++/impl/codegen/status_helper.h \
     include/grpc++/impl/codegen/string_ref.h \
     include/grpc++/impl/codegen/stub_options.h \
     include/grpc++/impl/codegen/sync.h \
@@ -4121,27 +4097,23 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/sync_no_cxx11.h \
     include/grpc++/impl/codegen/sync_stream.h \
     include/grpc++/impl/codegen/time.h \
-    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
     include/grpc/impl/codegen/grpc_types.h \
     include/grpc/impl/codegen/propagation_bits.h \
     include/grpc/impl/codegen/status.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc++/impl/codegen/proto_utils.h \
     include/grpc++/impl/codegen/config_protobuf.h \
     include/grpc++/impl/codegen/thrift_serializer.h \
@@ -4374,27 +4346,23 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/grpc_posix.h \
     include/grpc/grpc_security_constants.h \
     include/grpc/status.h \
-    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
     include/grpc/impl/codegen/grpc_types.h \
     include/grpc/impl/codegen/propagation_bits.h \
     include/grpc/impl/codegen/status.h \
-    include/grpc/impl/codegen/alloc.h \
     include/grpc/impl/codegen/atm.h \
     include/grpc/impl/codegen/atm_gcc_atomic.h \
     include/grpc/impl/codegen/atm_gcc_sync.h \
     include/grpc/impl/codegen/atm_windows.h \
-    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/gpr_types.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/slice.h \
-    include/grpc/impl/codegen/slice_buffer.h \
     include/grpc/impl/codegen/sync.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc++/impl/codegen/async_stream.h \
     include/grpc++/impl/codegen/async_unary_call.h \
     include/grpc++/impl/codegen/call.h \
@@ -4418,6 +4386,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/service_type.h \
     include/grpc++/impl/codegen/status.h \
     include/grpc++/impl/codegen/status_code_enum.h \
+    include/grpc++/impl/codegen/status_helper.h \
     include/grpc++/impl/codegen/string_ref.h \
     include/grpc++/impl/codegen/stub_options.h \
     include/grpc++/impl/codegen/sync.h \
diff --git a/build.yaml b/build.yaml
index f1033da28a7b06aa30e8a93c10c2a0db54ffd79b..01997ecbd8bbb21e3ced8bd021b5cae6c84a62e7 100644
--- a/build.yaml
+++ b/build.yaml
@@ -141,20 +141,17 @@ filegroups:
   - gpr_codegen
 - name: gpr_codegen
   public_headers:
-  - include/grpc/impl/codegen/alloc.h
   - include/grpc/impl/codegen/atm.h
   - include/grpc/impl/codegen/atm_gcc_atomic.h
   - include/grpc/impl/codegen/atm_gcc_sync.h
   - include/grpc/impl/codegen/atm_windows.h
-  - include/grpc/impl/codegen/log.h
+  - include/grpc/impl/codegen/gpr_types.h
   - include/grpc/impl/codegen/port_platform.h
   - include/grpc/impl/codegen/slice.h
-  - include/grpc/impl/codegen/slice_buffer.h
   - include/grpc/impl/codegen/sync.h
   - include/grpc/impl/codegen/sync_generic.h
   - include/grpc/impl/codegen/sync_posix.h
   - include/grpc/impl/codegen/sync_windows.h
-  - include/grpc/impl/codegen/time.h
 - name: grpc_base
   public_headers:
   - include/grpc/byte_buffer.h
@@ -382,7 +379,6 @@ filegroups:
   - grpc_base
 - name: grpc_codegen
   public_headers:
-  - include/grpc/impl/codegen/byte_buffer.h
   - include/grpc/impl/codegen/byte_buffer_reader.h
   - include/grpc/impl/codegen/compression_types.h
   - include/grpc/impl/codegen/connectivity_state.h
@@ -760,6 +756,7 @@ filegroups:
   - include/grpc++/impl/codegen/service_type.h
   - include/grpc++/impl/codegen/status.h
   - include/grpc++/impl/codegen/status_code_enum.h
+  - include/grpc++/impl/codegen/status_helper.h
   - include/grpc++/impl/codegen/string_ref.h
   - include/grpc++/impl/codegen/stub_options.h
   - include/grpc++/impl/codegen/sync.h
diff --git a/doc/http-grpc-status-mapping.md b/doc/http-grpc-status-mapping.md
new file mode 100644
index 0000000000000000000000000000000000000000..928fe54420016d340685d1c416264e56ced8456d
--- /dev/null
+++ b/doc/http-grpc-status-mapping.md
@@ -0,0 +1,30 @@
+# HTTP to gRPC Status Code Mapping
+
+Since intermediaries are a common part of HTTP infrastructure some responses to
+gRPC requests may be received that do not include the grpc-status header. In
+some cases mapping error codes from an intermediary allows the gRPC client to
+behave more appropriately to the error situation without overloading the
+semantics of either error code.
+
+This table is to be used _only_ for clients that received a response that did
+not include grpc-status. If grpc-status was provided, it _must_ be used. Servers
+_must not_ use this table to determine an HTTP status code to use; the mappings
+are neither symmetric nor 1-to-1.
+
+| HTTP Status Code           | gRPC Status Code   |
+|----------------------------|--------------------|
+| 400 Bad Request            | INTERNAL           |
+| 401 Unauthorized           | UNAUTHENTICATED    |
+| 403 Forbidden              | PERMISSION\_DENIED |
+| 404 Not Found              | UNIMPLEMENTED      |
+| 429 Too Many Requests      | UNAVAILABLE        |
+| 502 Bad Gateway            | UNAVAILABLE        |
+| 503 Service Unavailable    | UNAVAILABLE        |
+| 504 Gateway Timeout        | UNAVAILABLE        |
+| _All other codes_          | UNKNOWN            |
+
+Technically, 1xx should have the entire header skipped and a subsequent header
+be read. See RFC 7540 §8.1.
+
+200 is UNKNOWN because there should be a grpc-status in case of truly OK
+response.
diff --git a/etc/README.md b/etc/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..87af44f7361538147f268cbec901fa123603ffec
--- /dev/null
+++ b/etc/README.md
@@ -0,0 +1,4 @@
+The roots.pem file is periodically generated from:
+https://hg.mozilla.org/mozilla-central/raw-file/tip/security/nss/lib/ckfw/builtins/certdata.txt
+using
+https://github.com/agl/extract-nss-root-certs
diff --git a/etc/roots.pem b/etc/roots.pem
index e6df88ea923ab4c27ccfb1ae6bded876ca44a113..d376e58ff501ebeb20f9686437ee5148f3b56e90 100644
--- a/etc/roots.pem
+++ b/etc/roots.pem
@@ -5387,3 +5387,42 @@ BggqhkjOPQQDAwNpADBmAjEAj6jcnboMBBf6Fek9LykBl7+BFjNAk2z8+e2AcG+q
 j9uEwov1NcoG3GRvaBbhj5G5AjEA2Euly8LQCGzpGPta3U1fJAuwACEl74+nBCZx
 4nxp5V2a+EEfOzmTk51V6s2N8fvB
 -----END CERTIFICATE-----
+
+# Issuer: CN=ISRG Root X1 O=Internet Security Research Group
+# Subject: CN=ISRG Root X1 O=Internet Security Research Group
+# Label: "ISRG Root X1"
+# Serial: 172886928669790476064670243504169061120
+# MD5 Fingerprint: 0c:d2:f9:e0:da:17:73:e9:ed:86:4d:a5:e3:70:e7:4e
+# SHA1 Fingerprint: ca:bd:2a:79:a1:07:6a:31:f2:1d:25:36:35:cb:03:9d:43:29:a5:e8
+# SHA256 Fingerprint: 96:bc:ec:06:26:49:76:f3:74:60:77:9a:cf:28:c5:a7:cf:e8:a3:c0:aa:e1:1a:8f:fc:ee:05:c0:bd:df:08:c6
+-----BEGIN CERTIFICATE-----
+MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw
+TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
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+oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq
+4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA
+mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d
+emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=
+-----END CERTIFICATE-----
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 0ce6bb0be6e5cfce810184fd469b7b4906ea4ab6..18480be55588cb19c49f94c89638b4f382724629 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -144,20 +144,17 @@ Pod::Spec.new do |s|
                       'include/grpc/support/tls_msvc.h',
                       'include/grpc/support/tls_pthread.h',
                       'include/grpc/support/useful.h',
-                      'include/grpc/impl/codegen/alloc.h',
                       'include/grpc/impl/codegen/atm.h',
                       'include/grpc/impl/codegen/atm_gcc_atomic.h',
                       'include/grpc/impl/codegen/atm_gcc_sync.h',
                       'include/grpc/impl/codegen/atm_windows.h',
-                      'include/grpc/impl/codegen/log.h',
+                      'include/grpc/impl/codegen/gpr_types.h',
                       'include/grpc/impl/codegen/port_platform.h',
                       'include/grpc/impl/codegen/slice.h',
-                      'include/grpc/impl/codegen/slice_buffer.h',
                       'include/grpc/impl/codegen/sync.h',
                       'include/grpc/impl/codegen/sync_generic.h',
                       'include/grpc/impl/codegen/sync_posix.h',
                       'include/grpc/impl/codegen/sync_windows.h',
-                      'include/grpc/impl/codegen/time.h',
                       'include/grpc/byte_buffer.h',
                       'include/grpc/byte_buffer_reader.h',
                       'include/grpc/compression.h',
@@ -165,27 +162,23 @@ Pod::Spec.new do |s|
                       'include/grpc/grpc_posix.h',
                       'include/grpc/grpc_security_constants.h',
                       'include/grpc/status.h',
-                      'include/grpc/impl/codegen/byte_buffer.h',
                       'include/grpc/impl/codegen/byte_buffer_reader.h',
                       'include/grpc/impl/codegen/compression_types.h',
                       'include/grpc/impl/codegen/connectivity_state.h',
                       'include/grpc/impl/codegen/grpc_types.h',
                       'include/grpc/impl/codegen/propagation_bits.h',
                       'include/grpc/impl/codegen/status.h',
-                      'include/grpc/impl/codegen/alloc.h',
                       'include/grpc/impl/codegen/atm.h',
                       'include/grpc/impl/codegen/atm_gcc_atomic.h',
                       'include/grpc/impl/codegen/atm_gcc_sync.h',
                       'include/grpc/impl/codegen/atm_windows.h',
-                      'include/grpc/impl/codegen/log.h',
+                      'include/grpc/impl/codegen/gpr_types.h',
                       'include/grpc/impl/codegen/port_platform.h',
                       'include/grpc/impl/codegen/slice.h',
-                      'include/grpc/impl/codegen/slice_buffer.h',
                       'include/grpc/impl/codegen/sync.h',
                       'include/grpc/impl/codegen/sync_generic.h',
                       'include/grpc/impl/codegen/sync_posix.h',
                       'include/grpc/impl/codegen/sync_windows.h',
-                      'include/grpc/impl/codegen/time.h',
                       'include/grpc/grpc_security.h',
                       'include/grpc/census.h'
   end
diff --git a/grpc.def b/grpc.def
index d6ddd33a9264bd9d0723cdf2a02e7b0389a5812a..6e905a297ed143a5518ffd3912a63f4496712dea 100644
--- a/grpc.def
+++ b/grpc.def
@@ -1,4 +1,14 @@
 EXPORTS
+    grpc_raw_byte_buffer_create
+    grpc_raw_compressed_byte_buffer_create
+    grpc_byte_buffer_copy
+    grpc_byte_buffer_length
+    grpc_byte_buffer_destroy
+    grpc_byte_buffer_reader_init
+    grpc_byte_buffer_reader_destroy
+    grpc_byte_buffer_reader_next
+    grpc_byte_buffer_reader_readall
+    grpc_raw_byte_buffer_from_reader
     census_initialize
     census_shutdown
     census_supported
@@ -126,21 +136,48 @@ EXPORTS
     gpr_free_aligned
     gpr_set_allocation_functions
     gpr_get_allocation_functions
-    grpc_raw_byte_buffer_create
-    grpc_raw_compressed_byte_buffer_create
-    grpc_byte_buffer_copy
-    grpc_byte_buffer_length
-    grpc_byte_buffer_destroy
-    grpc_byte_buffer_reader_init
-    grpc_byte_buffer_reader_destroy
-    grpc_byte_buffer_reader_next
-    grpc_byte_buffer_reader_readall
-    grpc_raw_byte_buffer_from_reader
+    gpr_avl_create
+    gpr_avl_ref
+    gpr_avl_unref
+    gpr_avl_add
+    gpr_avl_remove
+    gpr_avl_get
+    gpr_avl_maybe_get
+    gpr_avl_is_empty
+    gpr_cmdline_create
+    gpr_cmdline_add_int
+    gpr_cmdline_add_flag
+    gpr_cmdline_add_string
+    gpr_cmdline_on_extra_arg
+    gpr_cmdline_set_survive_failure
+    gpr_cmdline_parse
+    gpr_cmdline_destroy
+    gpr_cmdline_usage_string
+    gpr_cpu_num_cores
+    gpr_cpu_current_cpu
+    gpr_histogram_create
+    gpr_histogram_destroy
+    gpr_histogram_add
+    gpr_histogram_merge
+    gpr_histogram_percentile
+    gpr_histogram_mean
+    gpr_histogram_stddev
+    gpr_histogram_variance
+    gpr_histogram_maximum
+    gpr_histogram_minimum
+    gpr_histogram_count
+    gpr_histogram_sum
+    gpr_histogram_sum_of_squares
+    gpr_histogram_get_contents
+    gpr_histogram_merge_contents
+    gpr_join_host_port
+    gpr_split_host_port
     gpr_log
     gpr_log_message
     gpr_set_log_verbosity
     gpr_log_verbosity_init
     gpr_set_log_function
+    gpr_format_message
     gpr_slice_ref
     gpr_slice_unref
     gpr_slice_new
@@ -170,6 +207,13 @@ EXPORTS
     gpr_slice_buffer_trim_end
     gpr_slice_buffer_move_first
     gpr_slice_buffer_take_first
+    gpr_strdup
+    gpr_asprintf
+    gpr_subprocess_binary_extension
+    gpr_subprocess_create
+    gpr_subprocess_destroy
+    gpr_subprocess_join
+    gpr_subprocess_interrupt
     gpr_mu_init
     gpr_mu_destroy
     gpr_mu_lock
@@ -193,6 +237,14 @@ EXPORTS
     gpr_stats_init
     gpr_stats_inc
     gpr_stats_read
+    gpr_thd_new
+    gpr_thd_options_default
+    gpr_thd_options_set_detached
+    gpr_thd_options_set_joinable
+    gpr_thd_options_is_detached
+    gpr_thd_options_is_joinable
+    gpr_thd_currentid
+    gpr_thd_join
     gpr_time_0
     gpr_inf_future
     gpr_inf_past
@@ -214,55 +266,3 @@ EXPORTS
     gpr_time_similar
     gpr_sleep_until
     gpr_timespec_to_micros
-    gpr_avl_create
-    gpr_avl_ref
-    gpr_avl_unref
-    gpr_avl_add
-    gpr_avl_remove
-    gpr_avl_get
-    gpr_avl_maybe_get
-    gpr_avl_is_empty
-    gpr_cmdline_create
-    gpr_cmdline_add_int
-    gpr_cmdline_add_flag
-    gpr_cmdline_add_string
-    gpr_cmdline_on_extra_arg
-    gpr_cmdline_set_survive_failure
-    gpr_cmdline_parse
-    gpr_cmdline_destroy
-    gpr_cmdline_usage_string
-    gpr_cpu_num_cores
-    gpr_cpu_current_cpu
-    gpr_histogram_create
-    gpr_histogram_destroy
-    gpr_histogram_add
-    gpr_histogram_merge
-    gpr_histogram_percentile
-    gpr_histogram_mean
-    gpr_histogram_stddev
-    gpr_histogram_variance
-    gpr_histogram_maximum
-    gpr_histogram_minimum
-    gpr_histogram_count
-    gpr_histogram_sum
-    gpr_histogram_sum_of_squares
-    gpr_histogram_get_contents
-    gpr_histogram_merge_contents
-    gpr_join_host_port
-    gpr_split_host_port
-    gpr_format_message
-    gpr_strdup
-    gpr_asprintf
-    gpr_subprocess_binary_extension
-    gpr_subprocess_create
-    gpr_subprocess_destroy
-    gpr_subprocess_join
-    gpr_subprocess_interrupt
-    gpr_thd_new
-    gpr_thd_options_default
-    gpr_thd_options_set_detached
-    gpr_thd_options_set_joinable
-    gpr_thd_options_is_detached
-    gpr_thd_options_is_joinable
-    gpr_thd_currentid
-    gpr_thd_join
diff --git a/grpc.gemspec b/grpc.gemspec
index c1d2b0d7d33d2dcc638ff7f3055cfbb557ba5201..ef4ad3a1f8c682293e3000e9c3edc31c37f255dc 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -72,20 +72,17 @@ Gem::Specification.new do |s|
   s.files += %w( include/grpc/support/tls_msvc.h )
   s.files += %w( include/grpc/support/tls_pthread.h )
   s.files += %w( include/grpc/support/useful.h )
-  s.files += %w( include/grpc/impl/codegen/alloc.h )
   s.files += %w( include/grpc/impl/codegen/atm.h )
   s.files += %w( include/grpc/impl/codegen/atm_gcc_atomic.h )
   s.files += %w( include/grpc/impl/codegen/atm_gcc_sync.h )
   s.files += %w( include/grpc/impl/codegen/atm_windows.h )
-  s.files += %w( include/grpc/impl/codegen/log.h )
+  s.files += %w( include/grpc/impl/codegen/gpr_types.h )
   s.files += %w( include/grpc/impl/codegen/port_platform.h )
   s.files += %w( include/grpc/impl/codegen/slice.h )
-  s.files += %w( include/grpc/impl/codegen/slice_buffer.h )
   s.files += %w( include/grpc/impl/codegen/sync.h )
   s.files += %w( include/grpc/impl/codegen/sync_generic.h )
   s.files += %w( include/grpc/impl/codegen/sync_posix.h )
   s.files += %w( include/grpc/impl/codegen/sync_windows.h )
-  s.files += %w( include/grpc/impl/codegen/time.h )
   s.files += %w( src/core/lib/profiling/timers.h )
   s.files += %w( src/core/lib/support/backoff.h )
   s.files += %w( src/core/lib/support/block_annotate.h )
@@ -151,27 +148,23 @@ Gem::Specification.new do |s|
   s.files += %w( include/grpc/grpc_posix.h )
   s.files += %w( include/grpc/grpc_security_constants.h )
   s.files += %w( include/grpc/status.h )
-  s.files += %w( include/grpc/impl/codegen/byte_buffer.h )
   s.files += %w( include/grpc/impl/codegen/byte_buffer_reader.h )
   s.files += %w( include/grpc/impl/codegen/compression_types.h )
   s.files += %w( include/grpc/impl/codegen/connectivity_state.h )
   s.files += %w( include/grpc/impl/codegen/grpc_types.h )
   s.files += %w( include/grpc/impl/codegen/propagation_bits.h )
   s.files += %w( include/grpc/impl/codegen/status.h )
-  s.files += %w( include/grpc/impl/codegen/alloc.h )
   s.files += %w( include/grpc/impl/codegen/atm.h )
   s.files += %w( include/grpc/impl/codegen/atm_gcc_atomic.h )
   s.files += %w( include/grpc/impl/codegen/atm_gcc_sync.h )
   s.files += %w( include/grpc/impl/codegen/atm_windows.h )
-  s.files += %w( include/grpc/impl/codegen/log.h )
+  s.files += %w( include/grpc/impl/codegen/gpr_types.h )
   s.files += %w( include/grpc/impl/codegen/port_platform.h )
   s.files += %w( include/grpc/impl/codegen/slice.h )
-  s.files += %w( include/grpc/impl/codegen/slice_buffer.h )
   s.files += %w( include/grpc/impl/codegen/sync.h )
   s.files += %w( include/grpc/impl/codegen/sync_generic.h )
   s.files += %w( include/grpc/impl/codegen/sync_posix.h )
   s.files += %w( include/grpc/impl/codegen/sync_windows.h )
-  s.files += %w( include/grpc/impl/codegen/time.h )
   s.files += %w( include/grpc/grpc_security.h )
   s.files += %w( include/grpc/census.h )
   s.files += %w( src/core/lib/channel/channel_args.h )
diff --git a/include/grpc++/impl/codegen/async_unary_call.h b/include/grpc++/impl/codegen/async_unary_call.h
index 5ceab73cea6dca023a82ff4918c3da5db403ae5e..87c94d6507efdcf81f99efbdf17196a7254b5efd 100644
--- a/include/grpc++/impl/codegen/async_unary_call.h
+++ b/include/grpc++/impl/codegen/async_unary_call.h
@@ -40,7 +40,6 @@
 #include <grpc++/impl/codegen/server_context.h>
 #include <grpc++/impl/codegen/service_type.h>
 #include <grpc++/impl/codegen/status.h>
-#include <grpc/impl/codegen/log.h>
 
 namespace grpc {
 
diff --git a/include/grpc++/impl/codegen/call.h b/include/grpc++/impl/codegen/call.h
index f113aa0e45cce2d6030d3dddc4da009cf2eb1d77..e211373e7d43bf500d112f679f336c0918d95aa1 100644
--- a/include/grpc++/impl/codegen/call.h
+++ b/include/grpc++/impl/codegen/call.h
@@ -46,9 +46,9 @@
 #include <grpc++/impl/codegen/core_codegen_interface.h>
 #include <grpc++/impl/codegen/serialization_traits.h>
 #include <grpc++/impl/codegen/status.h>
+#include <grpc++/impl/codegen/status_helper.h>
 #include <grpc++/impl/codegen/string_ref.h>
 
-#include <grpc/impl/codegen/alloc.h>
 #include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/grpc_types.h>
 
@@ -438,7 +438,7 @@ class CallOpServerSendStatus {
     trailing_metadata_count_ = trailing_metadata.size();
     trailing_metadata_ = FillMetadataArray(trailing_metadata);
     send_status_available_ = true;
-    send_status_code_ = static_cast<grpc_status_code>(status.error_code());
+    send_status_code_ = static_cast<grpc_status_code>(GetCanonicalCode(status));
     send_status_details_ = status.error_message();
   }
 
diff --git a/include/grpc++/impl/codegen/client_context.h b/include/grpc++/impl/codegen/client_context.h
index 9fecb5043e91b72a2ae6c811b61fc18da184f30c..387d807c4b2175c71784015895923a46e55369ca 100644
--- a/include/grpc++/impl/codegen/client_context.h
+++ b/include/grpc++/impl/codegen/client_context.h
@@ -62,9 +62,7 @@
 #include <grpc++/impl/codegen/sync.h>
 #include <grpc++/impl/codegen/time.h>
 #include <grpc/impl/codegen/compression_types.h>
-#include <grpc/impl/codegen/log.h>
 #include <grpc/impl/codegen/propagation_bits.h>
-#include <grpc/impl/codegen/time.h>
 
 struct census_context;
 struct grpc_call;
diff --git a/include/grpc++/impl/codegen/completion_queue.h b/include/grpc++/impl/codegen/completion_queue.h
index 78bc5ca481c803c568829a4bdc62ab1169bf36b8..29bc97fdf7c19ead59201288c96d5c3bd0fe09ea 100644
--- a/include/grpc++/impl/codegen/completion_queue.h
+++ b/include/grpc++/impl/codegen/completion_queue.h
@@ -52,7 +52,6 @@
 #include <grpc++/impl/codegen/grpc_library.h>
 #include <grpc++/impl/codegen/status.h>
 #include <grpc++/impl/codegen/time.h>
-#include <grpc/impl/codegen/time.h>
 
 struct grpc_completion_queue;
 
@@ -219,7 +218,7 @@ class CompletionQueue : private GrpcLibraryCodegen {
   /// Performs a single polling pluck on \a tag.
   /// \warning Must not be mixed with calls to \a Next.
   void TryPluck(CompletionQueueTag* tag) {
-    auto deadline = gpr_time_0(GPR_CLOCK_REALTIME);
+    auto deadline = g_core_codegen_interface->gpr_time_0(GPR_CLOCK_REALTIME);
     auto ev = g_core_codegen_interface->grpc_completion_queue_pluck(
         cq_, tag, deadline, nullptr);
     if (ev.type == GRPC_QUEUE_TIMEOUT) return;
diff --git a/include/grpc++/impl/codegen/core_codegen.h b/include/grpc++/impl/codegen/core_codegen.h
index 2586b94504801ac467d597bf44d64fb7f8ae6656..0ce009e69d261d37a249966944b136f7f5044b28 100644
--- a/include/grpc++/impl/codegen/core_codegen.h
+++ b/include/grpc++/impl/codegen/core_codegen.h
@@ -55,6 +55,17 @@ class CoreCodegen : public CoreCodegenInterface {
   void* gpr_malloc(size_t size) GRPC_OVERRIDE;
   void gpr_free(void* p) GRPC_OVERRIDE;
 
+  void gpr_mu_init(gpr_mu* mu) GRPC_OVERRIDE;
+  void gpr_mu_destroy(gpr_mu* mu) GRPC_OVERRIDE;
+  void gpr_mu_lock(gpr_mu* mu) GRPC_OVERRIDE;
+  void gpr_mu_unlock(gpr_mu* mu) GRPC_OVERRIDE;
+  void gpr_cv_init(gpr_cv* cv) GRPC_OVERRIDE;
+  void gpr_cv_destroy(gpr_cv* cv) GRPC_OVERRIDE;
+  int gpr_cv_wait(gpr_cv* cv, gpr_mu* mu,
+                  gpr_timespec abs_deadline) GRPC_OVERRIDE;
+  void gpr_cv_signal(gpr_cv* cv) GRPC_OVERRIDE;
+  void gpr_cv_broadcast(gpr_cv* cv) GRPC_OVERRIDE;
+
   void grpc_byte_buffer_destroy(grpc_byte_buffer* bb) GRPC_OVERRIDE;
 
   int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,
@@ -78,6 +89,7 @@ class CoreCodegen : public CoreCodegenInterface {
   void grpc_metadata_array_destroy(grpc_metadata_array* array) GRPC_OVERRIDE;
 
   gpr_timespec gpr_inf_future(gpr_clock_type type) GRPC_OVERRIDE;
+  gpr_timespec gpr_time_0(gpr_clock_type type) GRPC_OVERRIDE;
 
   virtual const Status& ok() GRPC_OVERRIDE;
   virtual const Status& cancelled() GRPC_OVERRIDE;
diff --git a/include/grpc++/impl/codegen/core_codegen_interface.h b/include/grpc++/impl/codegen/core_codegen_interface.h
index f9a8f9b980b9bb5d06dff63d70118361b95555e9..68851f15c695ee52642a9a37aef75d6eddb9750c 100644
--- a/include/grpc++/impl/codegen/core_codegen_interface.h
+++ b/include/grpc++/impl/codegen/core_codegen_interface.h
@@ -36,7 +36,13 @@
 
 #include <grpc++/impl/codegen/config.h>
 #include <grpc++/impl/codegen/status.h>
+#include <grpc/impl/codegen/byte_buffer_reader.h>
 #include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/impl/codegen/sync.h>
+
+extern "C" {
+struct grpc_byte_buffer;
+}
 
 namespace grpc {
 
@@ -63,6 +69,17 @@ class CoreCodegenInterface {
   virtual void* gpr_malloc(size_t size) = 0;
   virtual void gpr_free(void* p) = 0;
 
+  virtual void gpr_mu_init(gpr_mu* mu) = 0;
+  virtual void gpr_mu_destroy(gpr_mu* mu) = 0;
+  virtual void gpr_mu_lock(gpr_mu* mu) = 0;
+  virtual void gpr_mu_unlock(gpr_mu* mu) = 0;
+  virtual void gpr_cv_init(gpr_cv* cv) = 0;
+  virtual void gpr_cv_destroy(gpr_cv* cv) = 0;
+  virtual int gpr_cv_wait(gpr_cv* cv, gpr_mu* mu,
+                          gpr_timespec abs_deadline) = 0;
+  virtual void gpr_cv_signal(gpr_cv* cv) = 0;
+  virtual void gpr_cv_broadcast(gpr_cv* cv) = 0;
+
   virtual void grpc_byte_buffer_destroy(grpc_byte_buffer* bb) = 0;
 
   virtual int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,
@@ -89,6 +106,7 @@ class CoreCodegenInterface {
   virtual const Status& cancelled() = 0;
 
   virtual gpr_timespec gpr_inf_future(gpr_clock_type type) = 0;
+  virtual gpr_timespec gpr_time_0(gpr_clock_type type) = 0;
 };
 
 extern CoreCodegenInterface* g_core_codegen_interface;
diff --git a/include/grpc++/impl/codegen/grpc_library.h b/include/grpc++/impl/codegen/grpc_library.h
index 3cdc6f3f7c4b1ab5b43965e14ba2162edc0d136e..2b11aff2149b02ecc301ba1059e9fa09b7621e3c 100644
--- a/include/grpc++/impl/codegen/grpc_library.h
+++ b/include/grpc++/impl/codegen/grpc_library.h
@@ -35,7 +35,6 @@
 #define GRPCXX_IMPL_CODEGEN_GRPC_LIBRARY_H
 
 #include <grpc++/impl/codegen/core_codegen_interface.h>
-#include <grpc/impl/codegen/log.h>
 
 namespace grpc {
 
diff --git a/include/grpc++/impl/codegen/proto_utils.h b/include/grpc++/impl/codegen/proto_utils.h
index e91e0b79faea7ba2b8daf598a74bcfc4835503ec..6f4786b87be0015d310bfbf7b7a7e5f9a981e643 100644
--- a/include/grpc++/impl/codegen/proto_utils.h
+++ b/include/grpc++/impl/codegen/proto_utils.h
@@ -40,9 +40,8 @@
 #include <grpc++/impl/codegen/core_codegen_interface.h>
 #include <grpc++/impl/codegen/serialization_traits.h>
 #include <grpc++/impl/codegen/status.h>
-#include <grpc/impl/codegen/byte_buffer.h>
 #include <grpc/impl/codegen/byte_buffer_reader.h>
-#include <grpc/impl/codegen/log.h>
+#include <grpc/impl/codegen/grpc_types.h>
 #include <grpc/impl/codegen/slice.h>
 
 namespace grpc {
diff --git a/include/grpc++/impl/codegen/rpc_service_method.h b/include/grpc++/impl/codegen/rpc_service_method.h
index 6fdc571deebb75581fce95a23e6e69d01e245879..78c54e377115f9eda3af939846a1d5177c9eb494 100644
--- a/include/grpc++/impl/codegen/rpc_service_method.h
+++ b/include/grpc++/impl/codegen/rpc_service_method.h
@@ -43,7 +43,10 @@
 #include <grpc++/impl/codegen/config.h>
 #include <grpc++/impl/codegen/rpc_method.h>
 #include <grpc++/impl/codegen/status.h>
-#include <grpc/impl/codegen/byte_buffer.h>
+
+extern "C" {
+struct grpc_byte_buffer;
+}
 
 namespace grpc {
 class ServerContext;
diff --git a/include/grpc++/impl/codegen/server_context.h b/include/grpc++/impl/codegen/server_context.h
index 379c9f7cf8c71c635463d2af456ca4ea532e0394..bce8d2c2f84d04fe3d7e98d721ecbbef84f39fb6 100644
--- a/include/grpc++/impl/codegen/server_context.h
+++ b/include/grpc++/impl/codegen/server_context.h
@@ -43,7 +43,6 @@
 #include <grpc++/impl/codegen/string_ref.h>
 #include <grpc++/impl/codegen/time.h>
 #include <grpc/impl/codegen/compression_types.h>
-#include <grpc/impl/codegen/time.h>
 
 struct gpr_timespec;
 struct grpc_metadata;
diff --git a/include/grpc++/impl/codegen/server_interface.h b/include/grpc++/impl/codegen/server_interface.h
index 20e418d76eb339db53973e93ad7cca3c48b3e062..4a00d7a3a13b4687ed38d46c7d7634717c8bc470 100644
--- a/include/grpc++/impl/codegen/server_interface.h
+++ b/include/grpc++/impl/codegen/server_interface.h
@@ -52,6 +52,8 @@ class ServerCredentials;
 class Service;
 class ThreadPoolInterface;
 
+extern CoreCodegenInterface* g_core_codegen_interface;
+
 /// Models a gRPC server.
 ///
 /// Servers are configured and started via \a grpc::ServerBuilder.
@@ -78,7 +80,10 @@ class ServerInterface : public CallHook {
   /// All completion queue associated with the server (for example, for async
   /// serving) must be shutdown *after* this method has returned:
   /// See \a ServerBuilder::AddCompletionQueue for details.
-  void Shutdown() { ShutdownInternal(gpr_inf_future(GPR_CLOCK_MONOTONIC)); }
+  void Shutdown() {
+    ShutdownInternal(
+        g_core_codegen_interface->gpr_inf_future(GPR_CLOCK_MONOTONIC));
+  }
 
   /// Block waiting for all work to complete.
   ///
diff --git a/include/grpc/impl/codegen/alloc.h b/include/grpc++/impl/codegen/status_helper.h
similarity index 53%
rename from include/grpc/impl/codegen/alloc.h
rename to include/grpc++/impl/codegen/status_helper.h
index 683c755f2c0ec8eb13fc22e9beb5a54924e1ba6f..bfe45d9e5b1ccc0d26d598927aaa4b8d419050a8 100644
--- a/include/grpc/impl/codegen/alloc.h
+++ b/include/grpc++/impl/codegen/status_helper.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,44 +31,17 @@
  *
  */
 
-#ifndef GRPC_IMPL_CODEGEN_ALLOC_H
-#define GRPC_IMPL_CODEGEN_ALLOC_H
+#ifndef GRPCXX_IMPL_CODEGEN_STATUS_HELPER_H
+#define GRPCXX_IMPL_CODEGEN_STATUS_HELPER_H
 
-#include <stddef.h>
+#include <grpc++/impl/codegen/status.h>
 
-#include <grpc/impl/codegen/port_platform.h>
+namespace grpc {
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef struct gpr_allocation_functions {
-  void *(*malloc_fn)(size_t size);
-  void *(*realloc_fn)(void *ptr, size_t size);
-  void (*free_fn)(void *ptr);
-} gpr_allocation_functions;
-
-/* malloc, never returns NULL */
-GPRAPI void *gpr_malloc(size_t size);
-/* free */
-GPRAPI void gpr_free(void *ptr);
-/* realloc, never returns NULL */
-GPRAPI void *gpr_realloc(void *p, size_t size);
-/* aligned malloc, never returns NULL, will align to 1 << alignment_log */
-GPRAPI void *gpr_malloc_aligned(size_t size, size_t alignment_log);
-/* free memory allocated by gpr_malloc_aligned */
-GPRAPI void gpr_free_aligned(void *ptr);
-
-/** Request the family of allocation functions in \a functions be used. NOTE
- * that this request will be honored in a *best effort* basis and that no
- * guarantees are made about the default functions (eg, malloc) being called. */
-GPRAPI void gpr_set_allocation_functions(gpr_allocation_functions functions);
-
-/** Return the family of allocation functions currently in effect. */
-GPRAPI gpr_allocation_functions gpr_get_allocation_functions();
-
-#ifdef __cplusplus
+inline StatusCode GetCanonicalCode(const Status& status) {
+  return status.error_code();
 }
-#endif
 
-#endif /* GRPC_IMPL_CODEGEN_ALLOC_H */
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_STATUS_HELPER_H
diff --git a/include/grpc++/impl/codegen/sync_no_cxx11.h b/include/grpc++/impl/codegen/sync_no_cxx11.h
index 55c059ede77f5ff6383fdc23d779a4d764e98672..87a6594f7df9f75b2b83b5d256275610041154a1 100644
--- a/include/grpc++/impl/codegen/sync_no_cxx11.h
+++ b/include/grpc++/impl/codegen/sync_no_cxx11.h
@@ -34,18 +34,20 @@
 #ifndef GRPCXX_IMPL_CODEGEN_SYNC_NO_CXX11_H
 #define GRPCXX_IMPL_CODEGEN_SYNC_NO_CXX11_H
 
-#include <grpc/impl/codegen/sync.h>
+#include <grpc++/impl/codegen/core_codegen_interface.h>
 
 namespace grpc {
 
+extern CoreCodegenInterface *g_core_codegen_interface;
+
 template <class mutex>
 class lock_guard;
 class condition_variable;
 
 class mutex {
  public:
-  mutex() { gpr_mu_init(&mu_); }
-  ~mutex() { gpr_mu_destroy(&mu_); }
+  mutex() { g_core_codegen_interface->gpr_mu_init(&mu_); }
+  ~mutex() { g_core_codegen_interface->gpr_mu_destroy(&mu_); }
 
  private:
   ::gpr_mu mu_;
@@ -57,16 +59,18 @@ class mutex {
 template <class mutex>
 class lock_guard {
  public:
-  lock_guard(mutex &mu) : mu_(mu), locked(true) { gpr_mu_lock(&mu.mu_); }
+  lock_guard(mutex &mu) : mu_(mu), locked(true) {
+    g_core_codegen_interface->gpr_mu_lock(&mu.mu_);
+  }
   ~lock_guard() { unlock_internal(); }
 
  protected:
   void lock_internal() {
-    if (!locked) gpr_mu_lock(&mu_.mu_);
+    if (!locked) g_core_codegen_interface->gpr_mu_lock(&mu_.mu_);
     locked = true;
   }
   void unlock_internal() {
-    if (locked) gpr_mu_unlock(&mu_.mu_);
+    if (locked) g_core_codegen_interface->gpr_mu_unlock(&mu_.mu_);
     locked = false;
   }
 
@@ -86,15 +90,17 @@ class unique_lock : public lock_guard<mutex> {
 
 class condition_variable {
  public:
-  condition_variable() { gpr_cv_init(&cv_); }
-  ~condition_variable() { gpr_cv_destroy(&cv_); }
+  condition_variable() { g_core_codegen_interface->gpr_cv_init(&cv_); }
+  ~condition_variable() { g_core_codegen_interface->gpr_cv_destroy(&cv_); }
   void wait(lock_guard<mutex> &mu) {
     mu.locked = false;
-    gpr_cv_wait(&cv_, &mu.mu_.mu_, gpr_inf_future(GPR_CLOCK_REALTIME));
+    g_core_codegen_interface->gpr_cv_wait(
+        &cv_, &mu.mu_.mu_,
+        g_core_codegen_interface->gpr_inf_future(GPR_CLOCK_REALTIME));
     mu.locked = true;
   }
-  void notify_one() { gpr_cv_signal(&cv_); }
-  void notify_all() { gpr_cv_broadcast(&cv_); }
+  void notify_one() { g_core_codegen_interface->gpr_cv_signal(&cv_); }
+  void notify_all() { g_core_codegen_interface->gpr_cv_broadcast(&cv_); }
 
  private:
   gpr_cv cv_;
diff --git a/include/grpc++/impl/codegen/sync_stream.h b/include/grpc++/impl/codegen/sync_stream.h
index 8249717d6c690afd505bb2de5530261b79a1fd90..e3c5a919b1e08b216ce683651d3bd50b7a6508d3 100644
--- a/include/grpc++/impl/codegen/sync_stream.h
+++ b/include/grpc++/impl/codegen/sync_stream.h
@@ -42,7 +42,6 @@
 #include <grpc++/impl/codegen/server_context.h>
 #include <grpc++/impl/codegen/service_type.h>
 #include <grpc++/impl/codegen/status.h>
-#include <grpc/impl/codegen/log.h>
 
 namespace grpc {
 
diff --git a/include/grpc++/impl/codegen/thrift_serializer.h b/include/grpc++/impl/codegen/thrift_serializer.h
index 7308a1577c84508fcdc4c907a5f267ba0a1ff9e5..fd324a994f970b2e4d5810d05536b62239a56a55 100644
--- a/include/grpc++/impl/codegen/thrift_serializer.h
+++ b/include/grpc++/impl/codegen/thrift_serializer.h
@@ -34,10 +34,8 @@
 #ifndef GRPCXX_IMPL_CODEGEN_THRIFT_SERIALIZER_H
 #define GRPCXX_IMPL_CODEGEN_THRIFT_SERIALIZER_H
 
-#include <grpc/impl/codegen/byte_buffer.h>
 #include <grpc/impl/codegen/byte_buffer_reader.h>
 #include <grpc/impl/codegen/slice.h>
-#include <grpc/impl/codegen/slice_buffer.h>
 #include <thrift/protocol/TBinaryProtocol.h>
 #include <thrift/protocol/TCompactProtocol.h>
 #include <thrift/protocol/TProtocolException.h>
@@ -216,4 +214,4 @@ typedef ThriftSerializer<void, TCompactProtocolT<TBufferBase>>
 }  // namespace thrift
 }  // namespace apache
 
-#endif
\ No newline at end of file
+#endif
diff --git a/include/grpc++/impl/codegen/thrift_utils.h b/include/grpc++/impl/codegen/thrift_utils.h
index 3615e2747430f94e8fe8667a46f6fe46e7cd928f..742d739703522f4fe5db83ec38d9812515647ce5 100644
--- a/include/grpc++/impl/codegen/thrift_utils.h
+++ b/include/grpc++/impl/codegen/thrift_utils.h
@@ -40,10 +40,8 @@
 #include <grpc++/impl/codegen/status.h>
 #include <grpc++/impl/codegen/status_code_enum.h>
 #include <grpc++/impl/codegen/thrift_serializer.h>
-#include <grpc/impl/codegen/byte_buffer.h>
 #include <grpc/impl/codegen/byte_buffer_reader.h>
 #include <grpc/impl/codegen/slice.h>
-#include <grpc/impl/codegen/slice_buffer.h>
 #include <cstdint>
 #include <cstdlib>
 
diff --git a/include/grpc++/impl/codegen/time.h b/include/grpc++/impl/codegen/time.h
index d9b19bce645dc49b4ab02f5c4412130aa25b9075..87c5112d0d2120fc9657f8181cdad34c908df924 100644
--- a/include/grpc++/impl/codegen/time.h
+++ b/include/grpc++/impl/codegen/time.h
@@ -35,7 +35,7 @@
 #define GRPCXX_IMPL_CODEGEN_TIME_H
 
 #include <grpc++/impl/codegen/config.h>
-#include <grpc/impl/codegen/time.h>
+#include <grpc/impl/codegen/grpc_types.h>
 
 namespace grpc {
 
@@ -79,7 +79,7 @@ class TimePoint<gpr_timespec> {
 
 #include <chrono>
 
-#include <grpc/impl/codegen/time.h>
+#include <grpc/impl/codegen/grpc_types.h>
 
 namespace grpc {
 
diff --git a/include/grpc/byte_buffer.h b/include/grpc/byte_buffer.h
index c3a394371d7797a9c0a5893b121aa4d694ce90db..f25c1d51d69a635674888ac8440beb9ec0d509f3 100644
--- a/include/grpc/byte_buffer.h
+++ b/include/grpc/byte_buffer.h
@@ -34,6 +34,69 @@
 #ifndef GRPC_BYTE_BUFFER_H
 #define GRPC_BYTE_BUFFER_H
 
-#include <grpc/impl/codegen/byte_buffer.h>
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/support/slice_buffer.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Returns a RAW byte buffer instance over the given slices (up to \a nslices).
+ *
+ * Increases the reference count for all \a slices processed. The user is
+ * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
+GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
+                                                      size_t nslices);
+
+/** Returns a *compressed* RAW byte buffer instance over the given slices (up to
+ * \a nslices). The \a compression argument defines the compression algorithm
+ * used to generate the data in \a slices.
+ *
+ * Increases the reference count for all \a slices processed. The user is
+ * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
+GRPCAPI grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
+    gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
+
+/** Copies input byte buffer \a bb.
+ *
+ * Increases the reference count of all the source slices. The user is
+ * responsible for calling grpc_byte_buffer_destroy over the returned copy. */
+GRPCAPI grpc_byte_buffer *grpc_byte_buffer_copy(grpc_byte_buffer *bb);
+
+/** Returns the size of the given byte buffer, in bytes. */
+GRPCAPI size_t grpc_byte_buffer_length(grpc_byte_buffer *bb);
+
+/** Destroys \a byte_buffer deallocating all its memory. */
+GRPCAPI void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer);
+
+/** Reader for byte buffers. Iterates over slices in the byte buffer */
+struct grpc_byte_buffer_reader;
+typedef struct grpc_byte_buffer_reader grpc_byte_buffer_reader;
+
+/** Initialize \a reader to read over \a buffer.
+ * Returns 1 upon success, 0 otherwise. */
+GRPCAPI int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
+                                         grpc_byte_buffer *buffer);
+
+/** Cleanup and destroy \a reader */
+GRPCAPI void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
+
+/** Updates \a slice with the next piece of data from from \a reader and returns
+ * 1. Returns 0 at the end of the stream. Caller is responsible for calling
+ * gpr_slice_unref on the result. */
+GRPCAPI int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
+                                         gpr_slice *slice);
+
+/** Merge all data from \a reader into single slice */
+GRPCAPI gpr_slice
+grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader);
+
+/** Returns a RAW byte buffer instance from the output of \a reader. */
+GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
+    grpc_byte_buffer_reader *reader);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* GRPC_BYTE_BUFFER_H */
diff --git a/include/grpc/compression.h b/include/grpc/compression.h
index 22bcf0e302023f95f13f3da3c4039f97e4831074..5f285cdcdf4d1df44e613b4550439dfc63ebe086 100644
--- a/include/grpc/compression.h
+++ b/include/grpc/compression.h
@@ -36,9 +36,10 @@
 
 #include <stdlib.h>
 
-#include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/port_platform.h>
 
+#include <grpc/impl/codegen/compression_types.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/include/grpc/impl/codegen/byte_buffer.h b/include/grpc/impl/codegen/byte_buffer.h
deleted file mode 100644
index fe1e2159793bce21ec1186389fec965b0cc0bed4..0000000000000000000000000000000000000000
--- a/include/grpc/impl/codegen/byte_buffer.h
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_IMPL_CODEGEN_BYTE_BUFFER_H
-#define GRPC_IMPL_CODEGEN_BYTE_BUFFER_H
-
-#include <grpc/impl/codegen/compression_types.h>
-#include <grpc/impl/codegen/slice_buffer.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
-  GRPC_BB_RAW
-  /* Future types may include GRPC_BB_PROTOBUF, etc. */
-} grpc_byte_buffer_type;
-
-struct grpc_byte_buffer {
-  void *reserved;
-  grpc_byte_buffer_type type;
-  union {
-    struct {
-      void *reserved[8];
-    } reserved;
-    struct {
-      grpc_compression_algorithm compression;
-      gpr_slice_buffer slice_buffer;
-    } raw;
-  } data;
-};
-typedef struct grpc_byte_buffer grpc_byte_buffer;
-
-/** Returns a RAW byte buffer instance over the given slices (up to \a nslices).
- *
- * Increases the reference count for all \a slices processed. The user is
- * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
-GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
-                                                      size_t nslices);
-
-/** Returns a *compressed* RAW byte buffer instance over the given slices (up to
- * \a nslices). The \a compression argument defines the compression algorithm
- * used to generate the data in \a slices.
- *
- * Increases the reference count for all \a slices processed. The user is
- * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
-GRPCAPI grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
-    gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
-
-/** Copies input byte buffer \a bb.
- *
- * Increases the reference count of all the source slices. The user is
- * responsible for calling grpc_byte_buffer_destroy over the returned copy. */
-GRPCAPI grpc_byte_buffer *grpc_byte_buffer_copy(grpc_byte_buffer *bb);
-
-/** Returns the size of the given byte buffer, in bytes. */
-GRPCAPI size_t grpc_byte_buffer_length(grpc_byte_buffer *bb);
-
-/** Destroys \a byte_buffer deallocating all its memory. */
-GRPCAPI void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer);
-
-/** Reader for byte buffers. Iterates over slices in the byte buffer */
-struct grpc_byte_buffer_reader;
-typedef struct grpc_byte_buffer_reader grpc_byte_buffer_reader;
-
-/** Initialize \a reader to read over \a buffer.
- * Returns 1 upon success, 0 otherwise. */
-GRPCAPI int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
-                                         grpc_byte_buffer *buffer);
-
-/** Cleanup and destroy \a reader */
-GRPCAPI void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
-
-/** Updates \a slice with the next piece of data from from \a reader and returns
- * 1. Returns 0 at the end of the stream. Caller is responsible for calling
- * gpr_slice_unref on the result. */
-GRPCAPI int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
-                                         gpr_slice *slice);
-
-/** Merge all data from \a reader into single slice */
-GRPCAPI gpr_slice
-grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader);
-
-/** Returns a RAW byte buffer instance from the output of \a reader. */
-GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
-    grpc_byte_buffer_reader *reader);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* GRPC_IMPL_CODEGEN_BYTE_BUFFER_H */
diff --git a/include/grpc/impl/codegen/byte_buffer_reader.h b/include/grpc/impl/codegen/byte_buffer_reader.h
index 10c382924ecdb21be9725f2eee8dd6ea571cf3d7..85a4864140848166fbb9185cfea44e49b2e932ec 100644
--- a/include/grpc/impl/codegen/byte_buffer_reader.h
+++ b/include/grpc/impl/codegen/byte_buffer_reader.h
@@ -34,15 +34,15 @@
 #ifndef GRPC_IMPL_CODEGEN_BYTE_BUFFER_READER_H
 #define GRPC_IMPL_CODEGEN_BYTE_BUFFER_READER_H
 
-#include <grpc/impl/codegen/byte_buffer.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+struct grpc_byte_buffer;
+
 struct grpc_byte_buffer_reader {
-  grpc_byte_buffer *buffer_in;
-  grpc_byte_buffer *buffer_out;
+  struct grpc_byte_buffer *buffer_in;
+  struct grpc_byte_buffer *buffer_out;
   /* Different current objects correspond to different types of byte buffers */
   union {
     /* Index into a slice buffer's array of slices */
diff --git a/include/grpc/impl/codegen/compression_types.h b/include/grpc/impl/codegen/compression_types.h
index 3034182d4c574261d47a4ead8ef8c800abdab666..170d99f431bbb5a657f82efddf32f05a35eb8a14 100644
--- a/include/grpc/impl/codegen/compression_types.h
+++ b/include/grpc/impl/codegen/compression_types.h
@@ -34,8 +34,8 @@
 #ifndef GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H
 #define GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H
 
-#include <grpc/impl/codegen/port_platform.h>
 #include <stdbool.h>
+#include <stdint.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/grpc/impl/codegen/gpr_types.h b/include/grpc/impl/codegen/gpr_types.h
new file mode 100644
index 0000000000000000000000000000000000000000..c8f0815f0b539c64f3a9a1404b19bfd05afc7121
--- /dev/null
+++ b/include/grpc/impl/codegen/gpr_types.h
@@ -0,0 +1,140 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_GPR_TYPES_H
+#define GRPC_IMPL_CODEGEN_GPR_TYPES_H
+
+#include <grpc/impl/codegen/port_platform.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* The clocks we support. */
+typedef enum {
+  /* Monotonic clock. Epoch undefined. Always moves forwards. */
+  GPR_CLOCK_MONOTONIC = 0,
+  /* Realtime clock. May jump forwards or backwards. Settable by
+     the system administrator. Has its epoch at 0:00:00 UTC 1 Jan 1970. */
+  GPR_CLOCK_REALTIME,
+  /* CPU cycle time obtained by rdtsc instruction on x86 platforms. Epoch
+     undefined. Degrades to GPR_CLOCK_REALTIME on other platforms. */
+  GPR_CLOCK_PRECISE,
+  /* Unmeasurable clock type: no base, created by taking the difference
+     between two times */
+  GPR_TIMESPAN
+} gpr_clock_type;
+
+/* Analogous to struct timespec. On some machines, absolute times may be in
+ * local time. */
+typedef struct gpr_timespec {
+  int64_t tv_sec;
+  int32_t tv_nsec;
+  /** Against which clock was this time measured? (or GPR_TIMESPAN if
+      this is a relative time meaure) */
+  gpr_clock_type clock_type;
+} gpr_timespec;
+
+/* Slice API
+
+   A slice represents a contiguous reference counted array of bytes.
+   It is cheap to take references to a slice, and it is cheap to create a
+   slice pointing to a subset of another slice.
+
+   The data-structure for slices is exposed here to allow non-gpr code to
+   build slices from whatever data they have available.
+
+   When defining interfaces that handle slices, care should be taken to define
+   reference ownership semantics (who should call unref?) and mutability
+   constraints (is the callee allowed to modify the slice?) */
+
+/* Reference count container for gpr_slice. Contains function pointers to
+   increment and decrement reference counts. Implementations should cleanup
+   when the reference count drops to zero.
+   Typically client code should not touch this, and use gpr_slice_malloc,
+   gpr_slice_new, or gpr_slice_new_with_len instead. */
+typedef struct gpr_slice_refcount {
+  void (*ref)(void *);
+  void (*unref)(void *);
+} gpr_slice_refcount;
+
+#define GPR_SLICE_INLINED_SIZE (sizeof(size_t) + sizeof(uint8_t *) - 1)
+
+/* A gpr_slice s, if initialized, represents the byte range
+   s.bytes[0..s.length-1].
+
+   It can have an associated ref count which has a destruction routine to be run
+   when the ref count reaches zero (see gpr_slice_new() and grp_slice_unref()).
+   Multiple gpr_slice values may share a ref count.
+
+   If the slice does not have a refcount, it represents an inlined small piece
+   of data that is copied by value. */
+typedef struct gpr_slice {
+  struct gpr_slice_refcount *refcount;
+  union {
+    struct {
+      uint8_t *bytes;
+      size_t length;
+    } refcounted;
+    struct {
+      uint8_t length;
+      uint8_t bytes[GPR_SLICE_INLINED_SIZE];
+    } inlined;
+  } data;
+} gpr_slice;
+
+#define GRPC_SLICE_BUFFER_INLINE_ELEMENTS 8
+
+/* Represents an expandable array of slices, to be interpreted as a
+   single item. */
+typedef struct {
+  /* slices in the array */
+  gpr_slice *slices;
+  /* the number of slices in the array */
+  size_t count;
+  /* the number of slices allocated in the array */
+  size_t capacity;
+  /* the combined length of all slices in the array */
+  size_t length;
+  /* inlined elements to avoid allocations */
+  gpr_slice inlined[GRPC_SLICE_BUFFER_INLINE_ELEMENTS];
+} gpr_slice_buffer;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_GPR_TYPES_H */
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index 1a3cb65083145e4a4152b6257d07d35ef42ff48b..a8e8ebe6ea92875441187a5ea7782bd902f19fb5 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -34,15 +34,37 @@
 #ifndef GRPC_IMPL_CODEGEN_GRPC_TYPES_H
 #define GRPC_IMPL_CODEGEN_GRPC_TYPES_H
 
-#include <grpc/impl/codegen/byte_buffer.h>
+#include <grpc/impl/codegen/gpr_types.h>
+
+#include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/status.h>
 
 #include <stddef.h>
+#include <stdint.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+typedef enum {
+  GRPC_BB_RAW
+  /* Future types may include GRPC_BB_PROTOBUF, etc. */
+} grpc_byte_buffer_type;
+
+typedef struct grpc_byte_buffer {
+  void *reserved;
+  grpc_byte_buffer_type type;
+  union {
+    struct {
+      void *reserved[8];
+    } reserved;
+    struct {
+      grpc_compression_algorithm compression;
+      gpr_slice_buffer slice_buffer;
+    } raw;
+  } data;
+} grpc_byte_buffer;
+
 /** Completion Queues enable notification of the completion of asynchronous
     actions. */
 typedef struct grpc_completion_queue grpc_completion_queue;
@@ -340,6 +362,8 @@ typedef enum {
   GRPC_OP_RECV_CLOSE_ON_SERVER
 } grpc_op_type;
 
+struct grpc_byte_buffer;
+
 /** Operation data: one field for each op type (except SEND_CLOSE_FROM_CLIENT
    which has no arguments) */
 typedef struct grpc_op {
@@ -364,7 +388,7 @@ typedef struct grpc_op {
         grpc_compression_level level;
       } maybe_compression_level;
     } send_initial_metadata;
-    grpc_byte_buffer *send_message;
+    struct grpc_byte_buffer *send_message;
     struct {
       size_t trailing_metadata_count;
       grpc_metadata *trailing_metadata;
@@ -380,7 +404,7 @@ typedef struct grpc_op {
     /** ownership of the byte buffer is moved to the caller; the caller must
         call grpc_byte_buffer_destroy on this value, or reuse it in a future op.
        */
-    grpc_byte_buffer **recv_message;
+    struct grpc_byte_buffer **recv_message;
     struct {
       /** ownership of the array is with the caller, but ownership of the
           elements stays with the call object (ie key, value members are owned
diff --git a/include/grpc/impl/codegen/log.h b/include/grpc/impl/codegen/log.h
deleted file mode 100644
index e5010c29da871e0b35416c7edfc60bef2f548779..0000000000000000000000000000000000000000
--- a/include/grpc/impl/codegen/log.h
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_IMPL_CODEGEN_LOG_H
-#define GRPC_IMPL_CODEGEN_LOG_H
-
-#include <inttypes.h>
-#include <stdarg.h>
-#include <stdlib.h> /* for abort() */
-
-#include <grpc/impl/codegen/port_platform.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* GPR log API.
-
-   Usage (within grpc):
-
-   int argument1 = 3;
-   char* argument2 = "hello";
-   gpr_log(GPR_DEBUG, "format string %d", argument1);
-   gpr_log(GPR_INFO, "hello world");
-   gpr_log(GPR_ERROR, "%d %s!!", argument1, argument2); */
-
-/* The severity of a log message - use the #defines below when calling into
-   gpr_log to additionally supply file and line data */
-typedef enum gpr_log_severity {
-  GPR_LOG_SEVERITY_DEBUG,
-  GPR_LOG_SEVERITY_INFO,
-  GPR_LOG_SEVERITY_ERROR
-} gpr_log_severity;
-
-#define GPR_LOG_VERBOSITY_UNSET -1
-
-/* Returns a string representation of the log severity */
-const char *gpr_log_severity_string(gpr_log_severity severity);
-
-/* Macros to build log contexts at various severity levels */
-#define GPR_DEBUG __FILE__, __LINE__, GPR_LOG_SEVERITY_DEBUG
-#define GPR_INFO __FILE__, __LINE__, GPR_LOG_SEVERITY_INFO
-#define GPR_ERROR __FILE__, __LINE__, GPR_LOG_SEVERITY_ERROR
-
-/* Log a message. It's advised to use GPR_xxx above to generate the context
- * for each message */
-GPRAPI void gpr_log(const char *file, int line, gpr_log_severity severity,
-                    const char *format, ...) GPRC_PRINT_FORMAT_CHECK(4, 5);
-
-GPRAPI void gpr_log_message(const char *file, int line,
-                            gpr_log_severity severity, const char *message);
-
-/* Set global log verbosity */
-GPRAPI void gpr_set_log_verbosity(gpr_log_severity min_severity_to_print);
-
-GPRAPI void gpr_log_verbosity_init();
-
-/* Log overrides: applications can use this API to intercept logging calls
-   and use their own implementations */
-
-typedef struct {
-  const char *file;
-  int line;
-  gpr_log_severity severity;
-  const char *message;
-} gpr_log_func_args;
-
-typedef void (*gpr_log_func)(gpr_log_func_args *args);
-GPRAPI void gpr_set_log_function(gpr_log_func func);
-
-/* abort() the process if x is zero, having written a line to the log.
-
-   Intended for internal invariants.  If the error can be recovered from,
-   without the possibility of corruption, or might best be reflected via
-   an exception in a higher-level language, consider returning error code.  */
-#define GPR_ASSERT(x)                                 \
-  do {                                                \
-    if (!(x)) {                                       \
-      gpr_log(GPR_ERROR, "assertion failed: %s", #x); \
-      abort();                                        \
-    }                                                 \
-  } while (0)
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* GRPC_IMPL_CODEGEN_LOG_H */
diff --git a/include/grpc/impl/codegen/slice.h b/include/grpc/impl/codegen/slice.h
index dfc0a774fcc12db6382811b2aa89a20104663401..a2637eea625f5b6df2bc659957eee4ad76f9831b 100644
--- a/include/grpc/impl/codegen/slice.h
+++ b/include/grpc/impl/codegen/slice.h
@@ -34,62 +34,8 @@
 #ifndef GRPC_IMPL_CODEGEN_SLICE_H
 #define GRPC_IMPL_CODEGEN_SLICE_H
 
-#include <grpc/impl/codegen/sync.h>
-
 #include <stddef.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Slice API
-
-   A slice represents a contiguous reference counted array of bytes.
-   It is cheap to take references to a slice, and it is cheap to create a
-   slice pointing to a subset of another slice.
-
-   The data-structure for slices is exposed here to allow non-gpr code to
-   build slices from whatever data they have available.
-
-   When defining interfaces that handle slices, care should be taken to define
-   reference ownership semantics (who should call unref?) and mutability
-   constraints (is the callee allowed to modify the slice?) */
-
-/* Reference count container for gpr_slice. Contains function pointers to
-   increment and decrement reference counts. Implementations should cleanup
-   when the reference count drops to zero.
-   Typically client code should not touch this, and use gpr_slice_malloc,
-   gpr_slice_new, or gpr_slice_new_with_len instead. */
-typedef struct gpr_slice_refcount {
-  void (*ref)(void *);
-  void (*unref)(void *);
-} gpr_slice_refcount;
-
-#define GPR_SLICE_INLINED_SIZE (sizeof(size_t) + sizeof(uint8_t *) - 1)
-
-/* A gpr_slice s, if initialized, represents the byte range
-   s.bytes[0..s.length-1].
-
-   It can have an associated ref count which has a destruction routine to be run
-   when the ref count reaches zero (see gpr_slice_new() and grp_slice_unref()).
-   Multiple gpr_slice values may share a ref count.
-
-   If the slice does not have a refcount, it represents an inlined small piece
-   of data that is copied by value. */
-typedef struct gpr_slice {
-  struct gpr_slice_refcount *refcount;
-  union {
-    struct {
-      uint8_t *bytes;
-      size_t length;
-    } refcounted;
-    struct {
-      uint8_t length;
-      uint8_t bytes[GPR_SLICE_INLINED_SIZE];
-    } inlined;
-  } data;
-} gpr_slice;
-
 #define GPR_SLICE_START_PTR(slice)                  \
   ((slice).refcount ? (slice).data.refcounted.bytes \
                     : (slice).data.inlined.bytes)
@@ -103,88 +49,4 @@ typedef struct gpr_slice {
   GPR_SLICE_START_PTR(slice) + GPR_SLICE_LENGTH(slice)
 #define GPR_SLICE_IS_EMPTY(slice) (GPR_SLICE_LENGTH(slice) == 0)
 
-/* Increment the refcount of s. Requires slice is initialized.
-   Returns s. */
-GPRAPI gpr_slice gpr_slice_ref(gpr_slice s);
-
-/* Decrement the ref count of s.  If the ref count of s reaches zero, all
-   slices sharing the ref count are destroyed, and considered no longer
-   initialized.  If s is ultimately derived from a call to gpr_slice_new(start,
-   len, dest) where dest!=NULL , then (*dest)(start) is called, else if s is
-   ultimately derived from a call to gpr_slice_new_with_len(start, len, dest)
-   where dest!=NULL , then (*dest)(start, len).  Requires s initialized.  */
-GPRAPI void gpr_slice_unref(gpr_slice s);
-
-/* Create a slice pointing at some data. Calls malloc to allocate a refcount
-   for the object, and arranges that destroy will be called with the pointer
-   passed in at destruction. */
-GPRAPI gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *));
-
-/* Equivalent to gpr_slice_new, but with a separate pointer that is
-   passed to the destroy function.  This function can be useful when
-   the data is part of a larger structure that must be destroyed when
-   the data is no longer needed. */
-GPRAPI gpr_slice gpr_slice_new_with_user_data(void *p, size_t len,
-                                              void (*destroy)(void *),
-                                              void *user_data);
-
-/* Equivalent to gpr_slice_new, but with a two argument destroy function that
-   also takes the slice length. */
-GPRAPI gpr_slice gpr_slice_new_with_len(void *p, size_t len,
-                                        void (*destroy)(void *, size_t));
-
-/* Equivalent to gpr_slice_new(malloc(len), len, free), but saves one malloc()
-   call.
-   Aborts if malloc() fails. */
-GPRAPI gpr_slice gpr_slice_malloc(size_t length);
-
-/* Create a slice by copying a string.
-   Does not preserve null terminators.
-   Equivalent to:
-     size_t len = strlen(source);
-     gpr_slice slice = gpr_slice_malloc(len);
-     memcpy(slice->data, source, len); */
-GPRAPI gpr_slice gpr_slice_from_copied_string(const char *source);
-
-/* Create a slice by copying a buffer.
-   Equivalent to:
-     gpr_slice slice = gpr_slice_malloc(len);
-     memcpy(slice->data, source, len); */
-GPRAPI gpr_slice gpr_slice_from_copied_buffer(const char *source, size_t len);
-
-/* Create a slice pointing to constant memory */
-GPRAPI gpr_slice gpr_slice_from_static_string(const char *source);
-
-/* Return a result slice derived from s, which shares a ref count with s, where
-   result.data==s.data+begin, and result.length==end-begin.
-   The ref count of s is increased by one.
-   Requires s initialized, begin <= end, begin <= s.length, and
-   end <= source->length. */
-GPRAPI gpr_slice gpr_slice_sub(gpr_slice s, size_t begin, size_t end);
-
-/* The same as gpr_slice_sub, but without altering the ref count */
-GPRAPI gpr_slice gpr_slice_sub_no_ref(gpr_slice s, size_t begin, size_t end);
-
-/* Splits s into two: modifies s to be s[0:split], and returns a new slice,
-   sharing a refcount with s, that contains s[split:s.length].
-   Requires s intialized, split <= s.length */
-GPRAPI gpr_slice gpr_slice_split_tail(gpr_slice *s, size_t split);
-
-/* Splits s into two: modifies s to be s[split:s.length], and returns a new
-   slice, sharing a refcount with s, that contains s[0:split].
-   Requires s intialized, split <= s.length */
-GPRAPI gpr_slice gpr_slice_split_head(gpr_slice *s, size_t split);
-
-GPRAPI gpr_slice gpr_empty_slice(void);
-
-/* Returns <0 if a < b, ==0 if a == b, >0 if a > b
-   The order is arbitrary, and is not guaranteed to be stable across different
-   versions of the API. */
-GPRAPI int gpr_slice_cmp(gpr_slice a, gpr_slice b);
-GPRAPI int gpr_slice_str_cmp(gpr_slice a, const char *b);
-
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* GRPC_IMPL_CODEGEN_SLICE_H */
diff --git a/include/grpc/impl/codegen/slice_buffer.h b/include/grpc/impl/codegen/slice_buffer.h
deleted file mode 100644
index 7858021600a1690979b7b0e305a3d0639bb544e4..0000000000000000000000000000000000000000
--- a/include/grpc/impl/codegen/slice_buffer.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_IMPL_CODEGEN_SLICE_BUFFER_H
-#define GRPC_IMPL_CODEGEN_SLICE_BUFFER_H
-
-#include <grpc/impl/codegen/slice.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define GRPC_SLICE_BUFFER_INLINE_ELEMENTS 8
-
-/* Represents an expandable array of slices, to be interpreted as a
-   single item. */
-typedef struct {
-  /* slices in the array */
-  gpr_slice *slices;
-  /* the number of slices in the array */
-  size_t count;
-  /* the number of slices allocated in the array */
-  size_t capacity;
-  /* the combined length of all slices in the array */
-  size_t length;
-  /* inlined elements to avoid allocations */
-  gpr_slice inlined[GRPC_SLICE_BUFFER_INLINE_ELEMENTS];
-} gpr_slice_buffer;
-
-/* initialize a slice buffer */
-GPRAPI void gpr_slice_buffer_init(gpr_slice_buffer *sb);
-/* destroy a slice buffer - unrefs any held elements */
-GPRAPI void gpr_slice_buffer_destroy(gpr_slice_buffer *sb);
-/* Add an element to a slice buffer - takes ownership of the slice.
-   This function is allowed to concatenate the passed in slice to the end of
-   some other slice if desired by the slice buffer. */
-GPRAPI void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice slice);
-/* add an element to a slice buffer - takes ownership of the slice and returns
-   the index of the slice.
-   Guarantees that the slice will not be concatenated at the end of another
-   slice (i.e. the data for this slice will begin at the first byte of the
-   slice at the returned index in sb->slices)
-   The implementation MAY decide to concatenate data at the end of a small
-   slice added in this fashion. */
-GPRAPI size_t gpr_slice_buffer_add_indexed(gpr_slice_buffer *sb,
-                                           gpr_slice slice);
-GPRAPI void gpr_slice_buffer_addn(gpr_slice_buffer *sb, gpr_slice *slices,
-                                  size_t n);
-/* add a very small (less than 8 bytes) amount of data to the end of a slice
-   buffer: returns a pointer into which to add the data */
-GPRAPI uint8_t *gpr_slice_buffer_tiny_add(gpr_slice_buffer *sb, size_t len);
-/* pop the last buffer, but don't unref it */
-GPRAPI void gpr_slice_buffer_pop(gpr_slice_buffer *sb);
-/* clear a slice buffer, unref all elements */
-GPRAPI void gpr_slice_buffer_reset_and_unref(gpr_slice_buffer *sb);
-/* swap the contents of two slice buffers */
-GPRAPI void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b);
-/* move all of the elements of src into dst */
-GPRAPI void gpr_slice_buffer_move_into(gpr_slice_buffer *src,
-                                       gpr_slice_buffer *dst);
-/* remove n bytes from the end of a slice buffer */
-GPRAPI void gpr_slice_buffer_trim_end(gpr_slice_buffer *src, size_t n,
-                                      gpr_slice_buffer *garbage);
-/* move the first n bytes of src into dst */
-GPRAPI void gpr_slice_buffer_move_first(gpr_slice_buffer *src, size_t n,
-                                        gpr_slice_buffer *dst);
-/* take the first slice in the slice buffer */
-GPRAPI gpr_slice gpr_slice_buffer_take_first(gpr_slice_buffer *src);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* GRPC_IMPL_CODEGEN_SLICE_BUFFER_H */
diff --git a/include/grpc/impl/codegen/sync.h b/include/grpc/impl/codegen/sync.h
index 5542482ed8088c3518c7a15ed40b29deb4d1681a..96aec0c2c09cd2897f5bb97ec0ab9e57376478a1 100644
--- a/include/grpc/impl/codegen/sync.h
+++ b/include/grpc/impl/codegen/sync.h
@@ -64,257 +64,4 @@
 #error Unable to determine platform for sync
 #endif
 
-#include <grpc/impl/codegen/time.h> /* for gpr_timespec */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* --- Mutex interface ---
-
-   At most one thread may hold an exclusive lock on a mutex at any given time.
-   Actions taken by a thread that holds a mutex exclusively happen after
-   actions taken by all previous holders of the mutex.  Variables of type
-   gpr_mu are uninitialized when first declared.  */
-
-/* Initialize *mu.  Requires:  *mu uninitialized.  */
-GPRAPI void gpr_mu_init(gpr_mu *mu);
-
-/* Cause *mu no longer to be initialized, freeing any memory in use.  Requires:
-   *mu initialized; no other concurrent operation on *mu.  */
-GPRAPI void gpr_mu_destroy(gpr_mu *mu);
-
-/* Wait until no thread has a lock on *mu, cause the calling thread to own an
-   exclusive lock on *mu, then return.  May block indefinitely or crash if the
-   calling thread has a lock on *mu.  Requires:  *mu initialized.  */
-GPRAPI void gpr_mu_lock(gpr_mu *mu);
-
-/* Release an exclusive lock on *mu held by the calling thread.  Requires:  *mu
-   initialized; the calling thread holds an exclusive lock on *mu.  */
-GPRAPI void gpr_mu_unlock(gpr_mu *mu);
-
-/* Without blocking, attempt to acquire an exclusive lock on *mu for the
-   calling thread, then return non-zero iff success.  Fail, if any thread holds
-   the lock; succeeds with high probability if no thread holds the lock.
-   Requires:  *mu initialized.  */
-GPRAPI int gpr_mu_trylock(gpr_mu *mu);
-
-/* --- Condition variable interface ---
-
-   A while-loop should be used with gpr_cv_wait() when waiting for conditions
-   to become true.  See the example below.  Variables of type gpr_cv are
-   uninitialized when first declared.  */
-
-/* Initialize *cv.  Requires:  *cv uninitialized.  */
-GPRAPI void gpr_cv_init(gpr_cv *cv);
-
-/* Cause *cv no longer to be initialized, freeing any memory in use.  Requires:
-   *cv initialized; no other concurrent operation on *cv.*/
-GPRAPI void gpr_cv_destroy(gpr_cv *cv);
-
-/* Atomically release *mu and wait on *cv.  When the calling thread is woken
-   from *cv or the deadline abs_deadline is exceeded, execute gpr_mu_lock(mu)
-   and return whether the deadline was exceeded.  Use
-   abs_deadline==gpr_inf_future for no deadline.  abs_deadline can be either
-   an absolute deadline, or a GPR_TIMESPAN.  May return even when not
-   woken explicitly.  Requires:  *mu and *cv initialized; the calling thread
-   holds an exclusive lock on *mu.  */
-GPRAPI int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
-
-/* If any threads are waiting on *cv, wake at least one.
-   Clients may treat this as an optimization of gpr_cv_broadcast()
-   for use in the case where waking more than one waiter is not useful.
-   Requires:  *cv initialized.  */
-GPRAPI void gpr_cv_signal(gpr_cv *cv);
-
-/* Wake all threads waiting on *cv.  Requires:  *cv initialized.  */
-GPRAPI void gpr_cv_broadcast(gpr_cv *cv);
-
-/* --- One-time initialization ---
-
-   gpr_once must be declared with static storage class, and initialized with
-   GPR_ONCE_INIT.  e.g.,
-     static gpr_once once_var = GPR_ONCE_INIT;     */
-
-/* Ensure that (*init_routine)() has been called exactly once (for the
-   specified gpr_once instance) and then return.
-   If multiple threads call gpr_once() on the same gpr_once instance, one of
-   them will call (*init_routine)(), and the others will block until that call
-   finishes.*/
-GPRAPI void gpr_once_init(gpr_once *once, void (*init_routine)(void));
-
-/* --- One-time event notification ---
-
-  These operations act on a gpr_event, which should be initialized with
-  gpr_ev_init(), or with GPR_EVENT_INIT if static, e.g.,
-       static gpr_event event_var = GPR_EVENT_INIT;
-  It requires no destruction.  */
-
-/* Initialize *ev. */
-GPRAPI void gpr_event_init(gpr_event *ev);
-
-/* Set *ev so that gpr_event_get() and gpr_event_wait() will return value.
-   Requires:  *ev initialized; value != NULL; no prior or concurrent calls to
-   gpr_event_set(ev, ...) since initialization.  */
-GPRAPI void gpr_event_set(gpr_event *ev, void *value);
-
-/* Return the value set by gpr_event_set(ev, ...), or NULL if no such call has
-   completed.  If the result is non-NULL, all operations that occurred prior to
-   the gpr_event_set(ev, ...) set will be visible after this call returns.
-   Requires:  *ev initialized.  This operation is faster than acquiring a mutex
-   on most platforms.  */
-GPRAPI void *gpr_event_get(gpr_event *ev);
-
-/* Wait until *ev is set by gpr_event_set(ev, ...), or abs_deadline is
-   exceeded, then return gpr_event_get(ev).  Requires:  *ev initialized.  Use
-   abs_deadline==gpr_inf_future for no deadline.  When the event has been
-   signalled before the call, this operation is faster than acquiring a mutex
-   on most platforms.  */
-GPRAPI void *gpr_event_wait(gpr_event *ev, gpr_timespec abs_deadline);
-
-/* --- Reference counting ---
-
-   These calls act on the type gpr_refcount.  It requires no destruction.  */
-
-/* Initialize *r to value n.  */
-GPRAPI void gpr_ref_init(gpr_refcount *r, int n);
-
-/* Increment the reference count *r.  Requires *r initialized. */
-GPRAPI void gpr_ref(gpr_refcount *r);
-
-/* Increment the reference count *r.  Requires *r initialized.
-   Crashes if refcount is zero */
-GPRAPI void gpr_ref_non_zero(gpr_refcount *r);
-
-/* Increment the reference count *r by n.  Requires *r initialized, n > 0. */
-GPRAPI void gpr_refn(gpr_refcount *r, int n);
-
-/* Decrement the reference count *r and return non-zero iff it has reached
-   zero. .  Requires *r initialized. */
-GPRAPI int gpr_unref(gpr_refcount *r);
-
-/* --- Stats counters ---
-
-   These calls act on the integral type gpr_stats_counter.  It requires no
-   destruction.  Static instances may be initialized with
-       gpr_stats_counter c = GPR_STATS_INIT;
-   Beware:  These operations do not imply memory barriers.  Do not use them to
-   synchronize other events.  */
-
-/* Initialize *c to the value n. */
-GPRAPI void gpr_stats_init(gpr_stats_counter *c, intptr_t n);
-
-/* *c += inc.  Requires: *c initialized. */
-GPRAPI void gpr_stats_inc(gpr_stats_counter *c, intptr_t inc);
-
-/* Return *c.  Requires: *c initialized. */
-GPRAPI intptr_t gpr_stats_read(const gpr_stats_counter *c);
-
-/* ==================Example use of interface===================
-   A producer-consumer queue of up to N integers,
-   illustrating the use of the calls in this interface. */
-#if 0
-
-#define N 4
-
-   typedef struct queue {
-     gpr_cv non_empty;  /* Signalled when length becomes non-zero. */
-     gpr_cv non_full;   /* Signalled when length becomes non-N. */
-     gpr_mu mu;         /* Protects all fields below.
-                            (That is, except during initialization or
-                            destruction, the fields below should be accessed
-                            only by a thread that holds mu.) */
-     int head;           /* Index of head of queue 0..N-1. */
-     int length;         /* Number of valid elements in queue 0..N. */
-     int elem[N];        /* elem[head .. head+length-1] are queue elements. */
-   } queue;
-
-   /* Initialize *q. */
-   void queue_init(queue *q) {
-     gpr_mu_init(&q->mu);
-     gpr_cv_init(&q->non_empty);
-     gpr_cv_init(&q->non_full);
-     q->head = 0;
-     q->length = 0;
-   }
-
-   /* Free storage associated with *q. */
-   void queue_destroy(queue *q) {
-     gpr_mu_destroy(&q->mu);
-     gpr_cv_destroy(&q->non_empty);
-     gpr_cv_destroy(&q->non_full);
-   }
-
-   /* Wait until there is room in *q, then append x to *q. */
-   void queue_append(queue *q, int x) {
-     gpr_mu_lock(&q->mu);
-     /* To wait for a predicate without a deadline, loop on the negation of the
-        predicate, and use gpr_cv_wait(..., gpr_inf_future) inside the loop
-        to release the lock, wait, and reacquire on each iteration.  Code that
-        makes the condition true should use gpr_cv_broadcast() on the
-        corresponding condition variable.  The predicate must be on state
-        protected by the lock.  */
-     while (q->length == N) {
-       gpr_cv_wait(&q->non_full, &q->mu, gpr_inf_future);
-     }
-     if (q->length == 0) {  /* Wake threads blocked in queue_remove(). */
-       /* It's normal to use gpr_cv_broadcast() or gpr_signal() while
-          holding the lock. */
-       gpr_cv_broadcast(&q->non_empty);
-     }
-     q->elem[(q->head + q->length) % N] = x;
-     q->length++;
-     gpr_mu_unlock(&q->mu);
-   }
-
-   /* If it can be done without blocking, append x to *q and return non-zero.
-      Otherwise return 0. */
-   int queue_try_append(queue *q, int x) {
-     int result = 0;
-     if (gpr_mu_trylock(&q->mu)) {
-       if (q->length != N) {
-         if (q->length == 0) {  /* Wake threads blocked in queue_remove(). */
-           gpr_cv_broadcast(&q->non_empty);
-         }
-         q->elem[(q->head + q->length) % N] = x;
-         q->length++;
-         result = 1;
-       }
-       gpr_mu_unlock(&q->mu);
-     }
-     return result;
-   }
-
-   /* Wait until the *q is non-empty or deadline abs_deadline passes.  If the
-      queue is non-empty, remove its head entry, place it in *head, and return
-      non-zero.  Otherwise return 0.  */
-   int queue_remove(queue *q, int *head, gpr_timespec abs_deadline) {
-     int result = 0;
-     gpr_mu_lock(&q->mu);
-     /* To wait for a predicate with a deadline, loop on the negation of the
-        predicate or until gpr_cv_wait() returns true.  Code that makes
-        the condition true should use gpr_cv_broadcast() on the corresponding
-        condition variable.  The predicate must be on state protected by the
-        lock. */
-     while (q->length == 0 &&
-            !gpr_cv_wait(&q->non_empty, &q->mu, abs_deadline)) {
-     }
-     if (q->length != 0) {    /* Queue is non-empty. */
-       result = 1;
-       if (q->length == N) {  /* Wake threads blocked in queue_append(). */
-         gpr_cv_broadcast(&q->non_full);
-       }
-       *head = q->elem[q->head];
-       q->head = (q->head + 1) % N;
-       q->length--;
-     } /* else deadline exceeded */
-     gpr_mu_unlock(&q->mu);
-     return result;
-   }
-#endif /* 0 */
-
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* GRPC_IMPL_CODEGEN_SYNC_H */
diff --git a/include/grpc/impl/codegen/time.h b/include/grpc/impl/codegen/time.h
deleted file mode 100644
index 381e2672593a62c5db18803d0424490a3fd88b1d..0000000000000000000000000000000000000000
--- a/include/grpc/impl/codegen/time.h
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_IMPL_CODEGEN_TIME_H
-#define GRPC_IMPL_CODEGEN_TIME_H
-/* Time support.
-   We use gpr_timespec, which is analogous to struct timespec.  On some
-   machines, absolute times may be in local time.  */
-
-#include <grpc/impl/codegen/port_platform.h>
-#include <stddef.h>
-#include <time.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* The clocks we support. */
-typedef enum {
-  /* Monotonic clock. Epoch undefined. Always moves forwards. */
-  GPR_CLOCK_MONOTONIC = 0,
-  /* Realtime clock. May jump forwards or backwards. Settable by
-     the system administrator. Has its epoch at 0:00:00 UTC 1 Jan 1970. */
-  GPR_CLOCK_REALTIME,
-  /* CPU cycle time obtained by rdtsc instruction on x86 platforms. Epoch
-     undefined. Degrades to GPR_CLOCK_REALTIME on other platforms. */
-  GPR_CLOCK_PRECISE,
-  /* Unmeasurable clock type: no base, created by taking the difference
-     between two times */
-  GPR_TIMESPAN
-} gpr_clock_type;
-
-typedef struct gpr_timespec {
-  int64_t tv_sec;
-  int32_t tv_nsec;
-  /** Against which clock was this time measured? (or GPR_TIMESPAN if
-      this is a relative time meaure) */
-  gpr_clock_type clock_type;
-} gpr_timespec;
-
-/* Time constants. */
-GPRAPI gpr_timespec
-gpr_time_0(gpr_clock_type type); /* The zero time interval. */
-GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
-GPRAPI gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
-
-#define GPR_MS_PER_SEC 1000
-#define GPR_US_PER_SEC 1000000
-#define GPR_NS_PER_SEC 1000000000
-#define GPR_NS_PER_MS 1000000
-#define GPR_NS_PER_US 1000
-#define GPR_US_PER_MS 1000
-
-/* initialize time subsystem */
-GPRAPI void gpr_time_init(void);
-
-/* Return the current time measured from the given clocks epoch. */
-GPRAPI gpr_timespec gpr_now(gpr_clock_type clock);
-
-/* Convert a timespec from one clock to another */
-GPRAPI gpr_timespec gpr_convert_clock_type(gpr_timespec t,
-                                           gpr_clock_type target_clock);
-
-/* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
-   respectively.  */
-GPRAPI int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
-
-GPRAPI gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
-GPRAPI gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
-
-/* Add and subtract times.  Calculations saturate at infinities. */
-GPRAPI gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
-GPRAPI gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
-
-/* Return a timespec representing a given number of time units. INT64_MIN is
-   interpreted as gpr_inf_past, and INT64_MAX as gpr_inf_future.  */
-GPRAPI gpr_timespec gpr_time_from_micros(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_nanos(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_millis(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_seconds(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_minutes(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_hours(int64_t x, gpr_clock_type clock_type);
-
-GPRAPI int32_t gpr_time_to_millis(gpr_timespec timespec);
-
-/* Return 1 if two times are equal or within threshold of each other,
-   0 otherwise */
-GPRAPI int gpr_time_similar(gpr_timespec a, gpr_timespec b,
-                            gpr_timespec threshold);
-
-/* Sleep until at least 'until' - an absolute timeout */
-GPRAPI void gpr_sleep_until(gpr_timespec until);
-
-GPRAPI double gpr_timespec_to_micros(gpr_timespec t);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* GRPC_IMPL_CODEGEN_TIME_H */
diff --git a/include/grpc/module.modulemap b/include/grpc/module.modulemap
index 02fb2f39b20beabd59b8879a548ee2973267d345..51bfef2cc93d6bfe94ce558eec7c8334c555232f 100644
--- a/include/grpc/module.modulemap
+++ b/include/grpc/module.modulemap
@@ -4,8 +4,6 @@ framework module grpc {
   header "byte_buffer_reader.h"
   header "grpc_security.h"
   header "grpc_security_constants.h"
-  header "impl/codegen/alloc.h"
-  header "impl/codegen/byte_buffer_reader.h"
   header "support/alloc.h"
   header "support/port_platform.h"
   header "support/string_util.h"
diff --git a/include/grpc/support/alloc.h b/include/grpc/support/alloc.h
index 8d03af8424cee947f19a23aae0610bf408e7624d..327a9ff9f0110424b0eba9405a4f7dd55661f97c 100644
--- a/include/grpc/support/alloc.h
+++ b/include/grpc/support/alloc.h
@@ -34,6 +34,41 @@
 #ifndef GRPC_SUPPORT_ALLOC_H
 #define GRPC_SUPPORT_ALLOC_H
 
-#include <grpc/impl/codegen/alloc.h>
+#include <stddef.h>
+
+#include <grpc/impl/codegen/port_platform.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct gpr_allocation_functions {
+  void *(*malloc_fn)(size_t size);
+  void *(*realloc_fn)(void *ptr, size_t size);
+  void (*free_fn)(void *ptr);
+} gpr_allocation_functions;
+
+/* malloc, never returns NULL */
+GPRAPI void *gpr_malloc(size_t size);
+/* free */
+GPRAPI void gpr_free(void *ptr);
+/* realloc, never returns NULL */
+GPRAPI void *gpr_realloc(void *p, size_t size);
+/* aligned malloc, never returns NULL, will align to 1 << alignment_log */
+GPRAPI void *gpr_malloc_aligned(size_t size, size_t alignment_log);
+/* free memory allocated by gpr_malloc_aligned */
+GPRAPI void gpr_free_aligned(void *ptr);
+
+/** Request the family of allocation functions in \a functions be used. NOTE
+ * that this request will be honored in a *best effort* basis and that no
+ * guarantees are made about the default functions (eg, malloc) being called. */
+GPRAPI void gpr_set_allocation_functions(gpr_allocation_functions functions);
+
+/** Return the family of allocation functions currently in effect. */
+GPRAPI gpr_allocation_functions gpr_get_allocation_functions();
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* GRPC_SUPPORT_ALLOC_H */
diff --git a/include/grpc/support/log.h b/include/grpc/support/log.h
index 3fdba049430671b525d43ec51ebdfd84d96732c1..5acf17fc2c99a23a2ddf8aa240247261c65eaf18 100644
--- a/include/grpc/support/log.h
+++ b/include/grpc/support/log.h
@@ -34,6 +34,85 @@
 #ifndef GRPC_SUPPORT_LOG_H
 #define GRPC_SUPPORT_LOG_H
 
-#include <grpc/impl/codegen/log.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <stdlib.h> /* for abort() */
+
+#include <grpc/impl/codegen/port_platform.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* GPR log API.
+
+   Usage (within grpc):
+
+   int argument1 = 3;
+   char* argument2 = "hello";
+   gpr_log(GPR_DEBUG, "format string %d", argument1);
+   gpr_log(GPR_INFO, "hello world");
+   gpr_log(GPR_ERROR, "%d %s!!", argument1, argument2); */
+
+/* The severity of a log message - use the #defines below when calling into
+   gpr_log to additionally supply file and line data */
+typedef enum gpr_log_severity {
+  GPR_LOG_SEVERITY_DEBUG,
+  GPR_LOG_SEVERITY_INFO,
+  GPR_LOG_SEVERITY_ERROR
+} gpr_log_severity;
+
+#define GPR_LOG_VERBOSITY_UNSET -1
+
+/* Returns a string representation of the log severity */
+const char *gpr_log_severity_string(gpr_log_severity severity);
+
+/* Macros to build log contexts at various severity levels */
+#define GPR_DEBUG __FILE__, __LINE__, GPR_LOG_SEVERITY_DEBUG
+#define GPR_INFO __FILE__, __LINE__, GPR_LOG_SEVERITY_INFO
+#define GPR_ERROR __FILE__, __LINE__, GPR_LOG_SEVERITY_ERROR
+
+/* Log a message. It's advised to use GPR_xxx above to generate the context
+ * for each message */
+GPRAPI void gpr_log(const char *file, int line, gpr_log_severity severity,
+                    const char *format, ...) GPRC_PRINT_FORMAT_CHECK(4, 5);
+
+GPRAPI void gpr_log_message(const char *file, int line,
+                            gpr_log_severity severity, const char *message);
+
+/* Set global log verbosity */
+GPRAPI void gpr_set_log_verbosity(gpr_log_severity min_severity_to_print);
+
+GPRAPI void gpr_log_verbosity_init();
+
+/* Log overrides: applications can use this API to intercept logging calls
+   and use their own implementations */
+
+typedef struct {
+  const char *file;
+  int line;
+  gpr_log_severity severity;
+  const char *message;
+} gpr_log_func_args;
+
+typedef void (*gpr_log_func)(gpr_log_func_args *args);
+GPRAPI void gpr_set_log_function(gpr_log_func func);
+
+/* abort() the process if x is zero, having written a line to the log.
+
+   Intended for internal invariants.  If the error can be recovered from,
+   without the possibility of corruption, or might best be reflected via
+   an exception in a higher-level language, consider returning error code.  */
+#define GPR_ASSERT(x)                                 \
+  do {                                                \
+    if (!(x)) {                                       \
+      gpr_log(GPR_ERROR, "assertion failed: %s", #x); \
+      abort();                                        \
+    }                                                 \
+  } while (0)
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* GRPC_SUPPORT_LOG_H */
diff --git a/include/grpc/support/slice.h b/include/grpc/support/slice.h
index b45db03389129bfe2590fb8c481670a627db6984..b31fe6c0c565b723f9a6e5f4df14117cd6089a83 100644
--- a/include/grpc/support/slice.h
+++ b/include/grpc/support/slice.h
@@ -35,5 +35,94 @@
 #define GRPC_SUPPORT_SLICE_H
 
 #include <grpc/impl/codegen/slice.h>
+#include <grpc/support/sync.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Increment the refcount of s. Requires slice is initialized.
+   Returns s. */
+GPRAPI gpr_slice gpr_slice_ref(gpr_slice s);
+
+/* Decrement the ref count of s.  If the ref count of s reaches zero, all
+   slices sharing the ref count are destroyed, and considered no longer
+   initialized.  If s is ultimately derived from a call to gpr_slice_new(start,
+   len, dest) where dest!=NULL , then (*dest)(start) is called, else if s is
+   ultimately derived from a call to gpr_slice_new_with_len(start, len, dest)
+   where dest!=NULL , then (*dest)(start, len).  Requires s initialized.  */
+GPRAPI void gpr_slice_unref(gpr_slice s);
+
+/* Create a slice pointing at some data. Calls malloc to allocate a refcount
+   for the object, and arranges that destroy will be called with the pointer
+   passed in at destruction. */
+GPRAPI gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *));
+
+/* Equivalent to gpr_slice_new, but with a separate pointer that is
+   passed to the destroy function.  This function can be useful when
+   the data is part of a larger structure that must be destroyed when
+   the data is no longer needed. */
+GPRAPI gpr_slice gpr_slice_new_with_user_data(void *p, size_t len,
+                                              void (*destroy)(void *),
+                                              void *user_data);
+
+/* Equivalent to gpr_slice_new, but with a two argument destroy function that
+   also takes the slice length. */
+GPRAPI gpr_slice gpr_slice_new_with_len(void *p, size_t len,
+                                        void (*destroy)(void *, size_t));
+
+/* Equivalent to gpr_slice_new(malloc(len), len, free), but saves one malloc()
+   call.
+   Aborts if malloc() fails. */
+GPRAPI gpr_slice gpr_slice_malloc(size_t length);
+
+/* Create a slice by copying a string.
+   Does not preserve null terminators.
+   Equivalent to:
+     size_t len = strlen(source);
+     gpr_slice slice = gpr_slice_malloc(len);
+     memcpy(slice->data, source, len); */
+GPRAPI gpr_slice gpr_slice_from_copied_string(const char *source);
+
+/* Create a slice by copying a buffer.
+   Equivalent to:
+     gpr_slice slice = gpr_slice_malloc(len);
+     memcpy(slice->data, source, len); */
+GPRAPI gpr_slice gpr_slice_from_copied_buffer(const char *source, size_t len);
+
+/* Create a slice pointing to constant memory */
+GPRAPI gpr_slice gpr_slice_from_static_string(const char *source);
+
+/* Return a result slice derived from s, which shares a ref count with s, where
+   result.data==s.data+begin, and result.length==end-begin.
+   The ref count of s is increased by one.
+   Requires s initialized, begin <= end, begin <= s.length, and
+   end <= source->length. */
+GPRAPI gpr_slice gpr_slice_sub(gpr_slice s, size_t begin, size_t end);
+
+/* The same as gpr_slice_sub, but without altering the ref count */
+GPRAPI gpr_slice gpr_slice_sub_no_ref(gpr_slice s, size_t begin, size_t end);
+
+/* Splits s into two: modifies s to be s[0:split], and returns a new slice,
+   sharing a refcount with s, that contains s[split:s.length].
+   Requires s intialized, split <= s.length */
+GPRAPI gpr_slice gpr_slice_split_tail(gpr_slice *s, size_t split);
+
+/* Splits s into two: modifies s to be s[split:s.length], and returns a new
+   slice, sharing a refcount with s, that contains s[0:split].
+   Requires s intialized, split <= s.length */
+GPRAPI gpr_slice gpr_slice_split_head(gpr_slice *s, size_t split);
+
+GPRAPI gpr_slice gpr_empty_slice(void);
+
+/* Returns <0 if a < b, ==0 if a == b, >0 if a > b
+   The order is arbitrary, and is not guaranteed to be stable across different
+   versions of the API. */
+GPRAPI int gpr_slice_cmp(gpr_slice a, gpr_slice b);
+GPRAPI int gpr_slice_str_cmp(gpr_slice a, const char *b);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* GRPC_SUPPORT_SLICE_H */
diff --git a/include/grpc/support/slice_buffer.h b/include/grpc/support/slice_buffer.h
index cf7a89f8f10164518c1de6fa29326e9c65dc827b..3920432b02b1fa1e2d9d68b22ac6b432bddef9ac 100644
--- a/include/grpc/support/slice_buffer.h
+++ b/include/grpc/support/slice_buffer.h
@@ -34,6 +34,54 @@
 #ifndef GRPC_SUPPORT_SLICE_BUFFER_H
 #define GRPC_SUPPORT_SLICE_BUFFER_H
 
-#include <grpc/impl/codegen/slice_buffer.h>
+#include <grpc/support/slice.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* initialize a slice buffer */
+GPRAPI void gpr_slice_buffer_init(gpr_slice_buffer *sb);
+/* destroy a slice buffer - unrefs any held elements */
+GPRAPI void gpr_slice_buffer_destroy(gpr_slice_buffer *sb);
+/* Add an element to a slice buffer - takes ownership of the slice.
+   This function is allowed to concatenate the passed in slice to the end of
+   some other slice if desired by the slice buffer. */
+GPRAPI void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice slice);
+/* add an element to a slice buffer - takes ownership of the slice and returns
+   the index of the slice.
+   Guarantees that the slice will not be concatenated at the end of another
+   slice (i.e. the data for this slice will begin at the first byte of the
+   slice at the returned index in sb->slices)
+   The implementation MAY decide to concatenate data at the end of a small
+   slice added in this fashion. */
+GPRAPI size_t gpr_slice_buffer_add_indexed(gpr_slice_buffer *sb,
+                                           gpr_slice slice);
+GPRAPI void gpr_slice_buffer_addn(gpr_slice_buffer *sb, gpr_slice *slices,
+                                  size_t n);
+/* add a very small (less than 8 bytes) amount of data to the end of a slice
+   buffer: returns a pointer into which to add the data */
+GPRAPI uint8_t *gpr_slice_buffer_tiny_add(gpr_slice_buffer *sb, size_t len);
+/* pop the last buffer, but don't unref it */
+GPRAPI void gpr_slice_buffer_pop(gpr_slice_buffer *sb);
+/* clear a slice buffer, unref all elements */
+GPRAPI void gpr_slice_buffer_reset_and_unref(gpr_slice_buffer *sb);
+/* swap the contents of two slice buffers */
+GPRAPI void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b);
+/* move all of the elements of src into dst */
+GPRAPI void gpr_slice_buffer_move_into(gpr_slice_buffer *src,
+                                       gpr_slice_buffer *dst);
+/* remove n bytes from the end of a slice buffer */
+GPRAPI void gpr_slice_buffer_trim_end(gpr_slice_buffer *src, size_t n,
+                                      gpr_slice_buffer *garbage);
+/* move the first n bytes of src into dst */
+GPRAPI void gpr_slice_buffer_move_first(gpr_slice_buffer *src, size_t n,
+                                        gpr_slice_buffer *dst);
+/* take the first slice in the slice buffer */
+GPRAPI gpr_slice gpr_slice_buffer_take_first(gpr_slice_buffer *src);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* GRPC_SUPPORT_SLICE_BUFFER_H */
diff --git a/include/grpc/support/sync.h b/include/grpc/support/sync.h
index a0145803c202db42b6c10503f9ab74cfca493b96..a7bbb38c27e601af241335c4ad60b89c214f1b2b 100644
--- a/include/grpc/support/sync.h
+++ b/include/grpc/support/sync.h
@@ -34,6 +34,258 @@
 #ifndef GRPC_SUPPORT_SYNC_H
 #define GRPC_SUPPORT_SYNC_H
 
+#include <grpc/impl/codegen/gpr_types.h> /* for gpr_timespec */
 #include <grpc/impl/codegen/sync.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* --- Mutex interface ---
+
+   At most one thread may hold an exclusive lock on a mutex at any given time.
+   Actions taken by a thread that holds a mutex exclusively happen after
+   actions taken by all previous holders of the mutex.  Variables of type
+   gpr_mu are uninitialized when first declared.  */
+
+/* Initialize *mu.  Requires:  *mu uninitialized.  */
+GPRAPI void gpr_mu_init(gpr_mu *mu);
+
+/* Cause *mu no longer to be initialized, freeing any memory in use.  Requires:
+   *mu initialized; no other concurrent operation on *mu.  */
+GPRAPI void gpr_mu_destroy(gpr_mu *mu);
+
+/* Wait until no thread has a lock on *mu, cause the calling thread to own an
+   exclusive lock on *mu, then return.  May block indefinitely or crash if the
+   calling thread has a lock on *mu.  Requires:  *mu initialized.  */
+GPRAPI void gpr_mu_lock(gpr_mu *mu);
+
+/* Release an exclusive lock on *mu held by the calling thread.  Requires:  *mu
+   initialized; the calling thread holds an exclusive lock on *mu.  */
+GPRAPI void gpr_mu_unlock(gpr_mu *mu);
+
+/* Without blocking, attempt to acquire an exclusive lock on *mu for the
+   calling thread, then return non-zero iff success.  Fail, if any thread holds
+   the lock; succeeds with high probability if no thread holds the lock.
+   Requires:  *mu initialized.  */
+GPRAPI int gpr_mu_trylock(gpr_mu *mu);
+
+/* --- Condition variable interface ---
+
+   A while-loop should be used with gpr_cv_wait() when waiting for conditions
+   to become true.  See the example below.  Variables of type gpr_cv are
+   uninitialized when first declared.  */
+
+/* Initialize *cv.  Requires:  *cv uninitialized.  */
+GPRAPI void gpr_cv_init(gpr_cv *cv);
+
+/* Cause *cv no longer to be initialized, freeing any memory in use.  Requires:
+   *cv initialized; no other concurrent operation on *cv.*/
+GPRAPI void gpr_cv_destroy(gpr_cv *cv);
+
+/* Atomically release *mu and wait on *cv.  When the calling thread is woken
+   from *cv or the deadline abs_deadline is exceeded, execute gpr_mu_lock(mu)
+   and return whether the deadline was exceeded.  Use
+   abs_deadline==gpr_inf_future for no deadline.  abs_deadline can be either
+   an absolute deadline, or a GPR_TIMESPAN.  May return even when not
+   woken explicitly.  Requires:  *mu and *cv initialized; the calling thread
+   holds an exclusive lock on *mu.  */
+GPRAPI int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
+
+/* If any threads are waiting on *cv, wake at least one.
+   Clients may treat this as an optimization of gpr_cv_broadcast()
+   for use in the case where waking more than one waiter is not useful.
+   Requires:  *cv initialized.  */
+GPRAPI void gpr_cv_signal(gpr_cv *cv);
+
+/* Wake all threads waiting on *cv.  Requires:  *cv initialized.  */
+GPRAPI void gpr_cv_broadcast(gpr_cv *cv);
+
+/* --- One-time initialization ---
+
+   gpr_once must be declared with static storage class, and initialized with
+   GPR_ONCE_INIT.  e.g.,
+     static gpr_once once_var = GPR_ONCE_INIT;     */
+
+/* Ensure that (*init_routine)() has been called exactly once (for the
+   specified gpr_once instance) and then return.
+   If multiple threads call gpr_once() on the same gpr_once instance, one of
+   them will call (*init_routine)(), and the others will block until that call
+   finishes.*/
+GPRAPI void gpr_once_init(gpr_once *once, void (*init_routine)(void));
+
+/* --- One-time event notification ---
+
+  These operations act on a gpr_event, which should be initialized with
+  gpr_ev_init(), or with GPR_EVENT_INIT if static, e.g.,
+       static gpr_event event_var = GPR_EVENT_INIT;
+  It requires no destruction.  */
+
+/* Initialize *ev. */
+GPRAPI void gpr_event_init(gpr_event *ev);
+
+/* Set *ev so that gpr_event_get() and gpr_event_wait() will return value.
+   Requires:  *ev initialized; value != NULL; no prior or concurrent calls to
+   gpr_event_set(ev, ...) since initialization.  */
+GPRAPI void gpr_event_set(gpr_event *ev, void *value);
+
+/* Return the value set by gpr_event_set(ev, ...), or NULL if no such call has
+   completed.  If the result is non-NULL, all operations that occurred prior to
+   the gpr_event_set(ev, ...) set will be visible after this call returns.
+   Requires:  *ev initialized.  This operation is faster than acquiring a mutex
+   on most platforms.  */
+GPRAPI void *gpr_event_get(gpr_event *ev);
+
+/* Wait until *ev is set by gpr_event_set(ev, ...), or abs_deadline is
+   exceeded, then return gpr_event_get(ev).  Requires:  *ev initialized.  Use
+   abs_deadline==gpr_inf_future for no deadline.  When the event has been
+   signalled before the call, this operation is faster than acquiring a mutex
+   on most platforms.  */
+GPRAPI void *gpr_event_wait(gpr_event *ev, gpr_timespec abs_deadline);
+
+/* --- Reference counting ---
+
+   These calls act on the type gpr_refcount.  It requires no destruction.  */
+
+/* Initialize *r to value n.  */
+GPRAPI void gpr_ref_init(gpr_refcount *r, int n);
+
+/* Increment the reference count *r.  Requires *r initialized. */
+GPRAPI void gpr_ref(gpr_refcount *r);
+
+/* Increment the reference count *r.  Requires *r initialized.
+   Crashes if refcount is zero */
+GPRAPI void gpr_ref_non_zero(gpr_refcount *r);
+
+/* Increment the reference count *r by n.  Requires *r initialized, n > 0. */
+GPRAPI void gpr_refn(gpr_refcount *r, int n);
+
+/* Decrement the reference count *r and return non-zero iff it has reached
+   zero. .  Requires *r initialized. */
+GPRAPI int gpr_unref(gpr_refcount *r);
+
+/* --- Stats counters ---
+
+   These calls act on the integral type gpr_stats_counter.  It requires no
+   destruction.  Static instances may be initialized with
+       gpr_stats_counter c = GPR_STATS_INIT;
+   Beware:  These operations do not imply memory barriers.  Do not use them to
+   synchronize other events.  */
+
+/* Initialize *c to the value n. */
+GPRAPI void gpr_stats_init(gpr_stats_counter *c, intptr_t n);
+
+/* *c += inc.  Requires: *c initialized. */
+GPRAPI void gpr_stats_inc(gpr_stats_counter *c, intptr_t inc);
+
+/* Return *c.  Requires: *c initialized. */
+GPRAPI intptr_t gpr_stats_read(const gpr_stats_counter *c);
+
+/* ==================Example use of interface===================
+   A producer-consumer queue of up to N integers,
+   illustrating the use of the calls in this interface. */
+#if 0
+
+#define N 4
+
+   typedef struct queue {
+     gpr_cv non_empty;  /* Signalled when length becomes non-zero. */
+     gpr_cv non_full;   /* Signalled when length becomes non-N. */
+     gpr_mu mu;         /* Protects all fields below.
+                            (That is, except during initialization or
+                            destruction, the fields below should be accessed
+                            only by a thread that holds mu.) */
+     int head;           /* Index of head of queue 0..N-1. */
+     int length;         /* Number of valid elements in queue 0..N. */
+     int elem[N];        /* elem[head .. head+length-1] are queue elements. */
+   } queue;
+
+   /* Initialize *q. */
+   void queue_init(queue *q) {
+     gpr_mu_init(&q->mu);
+     gpr_cv_init(&q->non_empty);
+     gpr_cv_init(&q->non_full);
+     q->head = 0;
+     q->length = 0;
+   }
+
+   /* Free storage associated with *q. */
+   void queue_destroy(queue *q) {
+     gpr_mu_destroy(&q->mu);
+     gpr_cv_destroy(&q->non_empty);
+     gpr_cv_destroy(&q->non_full);
+   }
+
+   /* Wait until there is room in *q, then append x to *q. */
+   void queue_append(queue *q, int x) {
+     gpr_mu_lock(&q->mu);
+     /* To wait for a predicate without a deadline, loop on the negation of the
+        predicate, and use gpr_cv_wait(..., gpr_inf_future) inside the loop
+        to release the lock, wait, and reacquire on each iteration.  Code that
+        makes the condition true should use gpr_cv_broadcast() on the
+        corresponding condition variable.  The predicate must be on state
+        protected by the lock.  */
+     while (q->length == N) {
+       gpr_cv_wait(&q->non_full, &q->mu, gpr_inf_future);
+     }
+     if (q->length == 0) {  /* Wake threads blocked in queue_remove(). */
+       /* It's normal to use gpr_cv_broadcast() or gpr_signal() while
+          holding the lock. */
+       gpr_cv_broadcast(&q->non_empty);
+     }
+     q->elem[(q->head + q->length) % N] = x;
+     q->length++;
+     gpr_mu_unlock(&q->mu);
+   }
+
+   /* If it can be done without blocking, append x to *q and return non-zero.
+      Otherwise return 0. */
+   int queue_try_append(queue *q, int x) {
+     int result = 0;
+     if (gpr_mu_trylock(&q->mu)) {
+       if (q->length != N) {
+         if (q->length == 0) {  /* Wake threads blocked in queue_remove(). */
+           gpr_cv_broadcast(&q->non_empty);
+         }
+         q->elem[(q->head + q->length) % N] = x;
+         q->length++;
+         result = 1;
+       }
+       gpr_mu_unlock(&q->mu);
+     }
+     return result;
+   }
+
+   /* Wait until the *q is non-empty or deadline abs_deadline passes.  If the
+      queue is non-empty, remove its head entry, place it in *head, and return
+      non-zero.  Otherwise return 0.  */
+   int queue_remove(queue *q, int *head, gpr_timespec abs_deadline) {
+     int result = 0;
+     gpr_mu_lock(&q->mu);
+     /* To wait for a predicate with a deadline, loop on the negation of the
+        predicate or until gpr_cv_wait() returns true.  Code that makes
+        the condition true should use gpr_cv_broadcast() on the corresponding
+        condition variable.  The predicate must be on state protected by the
+        lock. */
+     while (q->length == 0 &&
+            !gpr_cv_wait(&q->non_empty, &q->mu, abs_deadline)) {
+     }
+     if (q->length != 0) {    /* Queue is non-empty. */
+       result = 1;
+       if (q->length == N) {  /* Wake threads blocked in queue_append(). */
+         gpr_cv_broadcast(&q->non_full);
+       }
+       *head = q->elem[q->head];
+       q->head = (q->head + 1) % N;
+       q->length--;
+     } /* else deadline exceeded */
+     gpr_mu_unlock(&q->mu);
+     return result;
+   }
+#endif /* 0 */
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* GRPC_SUPPORT_SYNC_H */
diff --git a/include/grpc/support/time.h b/include/grpc/support/time.h
index b3f2f8cd44f3f737ae37587bb2d34805e3400452..66bcfca6ed175224032c9d1be0bb43141e72dd12 100644
--- a/include/grpc/support/time.h
+++ b/include/grpc/support/time.h
@@ -34,6 +34,72 @@
 #ifndef GRPC_SUPPORT_TIME_H
 #define GRPC_SUPPORT_TIME_H
 
-#include <grpc/impl/codegen/time.h>
+#include <grpc/impl/codegen/gpr_types.h>
+
+#include <stddef.h>
+#include <time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Time constants. */
+GPRAPI gpr_timespec
+gpr_time_0(gpr_clock_type type); /* The zero time interval. */
+GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
+GPRAPI gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
+
+#define GPR_MS_PER_SEC 1000
+#define GPR_US_PER_SEC 1000000
+#define GPR_NS_PER_SEC 1000000000
+#define GPR_NS_PER_MS 1000000
+#define GPR_NS_PER_US 1000
+#define GPR_US_PER_MS 1000
+
+/* initialize time subsystem */
+GPRAPI void gpr_time_init(void);
+
+/* Return the current time measured from the given clocks epoch. */
+GPRAPI gpr_timespec gpr_now(gpr_clock_type clock);
+
+/* Convert a timespec from one clock to another */
+GPRAPI gpr_timespec gpr_convert_clock_type(gpr_timespec t,
+                                           gpr_clock_type target_clock);
+
+/* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
+   respectively.  */
+GPRAPI int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
+
+GPRAPI gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
+GPRAPI gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
+
+/* Add and subtract times.  Calculations saturate at infinities. */
+GPRAPI gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
+GPRAPI gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
+
+/* Return a timespec representing a given number of time units. INT64_MIN is
+   interpreted as gpr_inf_past, and INT64_MAX as gpr_inf_future.  */
+GPRAPI gpr_timespec gpr_time_from_micros(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_nanos(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_millis(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_seconds(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_minutes(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_hours(int64_t x, gpr_clock_type clock_type);
+
+GPRAPI int32_t gpr_time_to_millis(gpr_timespec timespec);
+
+/* Return 1 if two times are equal or within threshold of each other,
+   0 otherwise */
+GPRAPI int gpr_time_similar(gpr_timespec a, gpr_timespec b,
+                            gpr_timespec threshold);
+
+/* Sleep until at least 'until' - an absolute timeout */
+GPRAPI void gpr_sleep_until(gpr_timespec until);
+
+GPRAPI double gpr_timespec_to_micros(gpr_timespec t);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* GRPC_SUPPORT_TIME_H */
diff --git a/package.xml b/package.xml
index 8405d17ff52088f7d098bdf1554b9ee25b4f09c8..d0664ec0b6235307d042fb757ca28cd20505f8b0 100644
--- a/package.xml
+++ b/package.xml
@@ -79,20 +79,17 @@
     <file baseinstalldir="/" name="include/grpc/support/tls_msvc.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/tls_pthread.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/useful.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/alloc.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/atm.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_gcc_atomic.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_gcc_sync.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_windows.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/log.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/gpr_types.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/port_platform.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/slice.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/slice_buffer.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_generic.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_posix.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_windows.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/time.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/profiling/timers.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/support/backoff.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/support/block_annotate.h" role="src" />
@@ -158,27 +155,23 @@
     <file baseinstalldir="/" name="include/grpc/grpc_posix.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/grpc_security_constants.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/status.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/byte_buffer.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/byte_buffer_reader.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/compression_types.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/connectivity_state.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/grpc_types.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/propagation_bits.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/status.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/alloc.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/atm.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_gcc_atomic.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_gcc_sync.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_windows.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/log.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/gpr_types.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/port_platform.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/slice.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/slice_buffer.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_generic.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_posix.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_windows.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/time.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/grpc_security.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/census.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/channel/channel_args.h" role="src" />
diff --git a/src/core/ext/client_config/client_channel.c b/src/core/ext/client_config/client_channel.c
index 61e012578e036df6e511bafe687a120247cd1b26..58ef629be06aa4a547311cd5c82e6036542679b2 100644
--- a/src/core/ext/client_config/client_channel.c
+++ b/src/core/ext/client_config/client_channel.c
@@ -394,6 +394,8 @@ typedef struct client_channel_call_data {
   grpc_closure next_step;
 
   grpc_call_stack *owning_call;
+
+  grpc_linked_mdelem lb_token_mdelem;
 } call_data;
 
 static void add_waiting_locked(call_data *calld, grpc_transport_stream_op *op) {
@@ -566,9 +568,11 @@ static bool pick_subchannel(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
     int r;
     GRPC_LB_POLICY_REF(lb_policy, "pick_subchannel");
     gpr_mu_unlock(&chand->mu);
-    r = grpc_lb_policy_pick(exec_ctx, lb_policy, calld->pollent,
-                            initial_metadata, initial_metadata_flags,
-                            connected_subchannel, on_ready);
+    const grpc_lb_policy_pick_args inputs = {calld->pollent, initial_metadata,
+                                             initial_metadata_flags,
+                                             &calld->lb_token_mdelem};
+    r = grpc_lb_policy_pick(exec_ctx, lb_policy, &inputs, connected_subchannel,
+                            NULL, on_ready);
     GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "pick_subchannel");
     GPR_TIMER_END("pick_subchannel", 0);
     return r;
diff --git a/src/core/ext/client_config/lb_policy.c b/src/core/ext/client_config/lb_policy.c
index 8b980b2cca2133b9731bfcb677367f57493df560..903563ef6b58d8cc13a2f32851f6c4fd3eea29c4 100644
--- a/src/core/ext/client_config/lb_policy.c
+++ b/src/core/ext/client_config/lb_policy.c
@@ -100,13 +100,11 @@ void grpc_lb_policy_weak_unref(grpc_exec_ctx *exec_ctx,
 }
 
 int grpc_lb_policy_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-                        grpc_polling_entity *pollent,
-                        grpc_metadata_batch *initial_metadata,
-                        uint32_t initial_metadata_flags,
-                        grpc_connected_subchannel **target,
+                        const grpc_lb_policy_pick_args *pick_args,
+                        grpc_connected_subchannel **target, void **user_data,
                         grpc_closure *on_complete) {
-  return policy->vtable->pick(exec_ctx, policy, pollent, initial_metadata,
-                              initial_metadata_flags, target, on_complete);
+  return policy->vtable->pick(exec_ctx, policy, pick_args, target, user_data,
+                              on_complete);
 }
 
 void grpc_lb_policy_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
diff --git a/src/core/ext/client_config/lb_policy.h b/src/core/ext/client_config/lb_policy.h
index a2f5446fc6ca589c70e10e209013578e7dff66a5..37c93d707c17906459fa52c2e20ebc6eaceed2be 100644
--- a/src/core/ext/client_config/lb_policy.h
+++ b/src/core/ext/client_config/lb_policy.h
@@ -53,23 +53,38 @@ struct grpc_lb_policy {
   grpc_pollset_set *interested_parties;
 };
 
+/** Extra arguments for an LB pick */
+typedef struct grpc_lb_policy_pick_args {
+  /** Parties interested in the pick's progress */
+  grpc_polling_entity *pollent;
+  /** Initial metadata associated with the picking call. */
+  grpc_metadata_batch *initial_metadata;
+  /** See \a GRPC_INITIAL_METADATA_* in grpc_types.h */
+  uint32_t initial_metadata_flags;
+  /** Storage for LB token in \a initial_metadata, or NULL if not used */
+  grpc_linked_mdelem *lb_token_mdelem_storage;
+} grpc_lb_policy_pick_args;
+
 struct grpc_lb_policy_vtable {
   void (*destroy)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
-
   void (*shutdown)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
 
-  /** implement grpc_lb_policy_pick */
+  /** \see grpc_lb_policy_pick */
   int (*pick)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-              grpc_polling_entity *pollent,
-              grpc_metadata_batch *initial_metadata,
-              uint32_t initial_metadata_flags,
-              grpc_connected_subchannel **target, grpc_closure *on_complete);
+              const grpc_lb_policy_pick_args *pick_args,
+              grpc_connected_subchannel **target, void **user_data,
+              grpc_closure *on_complete);
+
+  /** \see grpc_lb_policy_cancel_pick */
   void (*cancel_pick)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                       grpc_connected_subchannel **target);
+
+  /** \see grpc_lb_policy_cancel_picks */
   void (*cancel_picks)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                        uint32_t initial_metadata_flags_mask,
                        uint32_t initial_metadata_flags_eq);
 
+  /** \see grpc_lb_policy_ping_one */
   void (*ping_one)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                    grpc_closure *closure);
 
@@ -83,8 +98,7 @@ struct grpc_lb_policy_vtable {
 
   /** call notify when the connectivity state of a channel changes from *state.
       Updates *state with the new state of the policy. Calling with a NULL \a
-      state cancels the subscription.
-      */
+      state cancels the subscription.  */
   void (*notify_on_state_change)(grpc_exec_ctx *exec_ctx,
                                  grpc_lb_policy *policy,
                                  grpc_connectivity_state *state,
@@ -124,26 +138,34 @@ void grpc_lb_policy_weak_unref(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
 void grpc_lb_policy_init(grpc_lb_policy *policy,
                          const grpc_lb_policy_vtable *vtable);
 
-/** Given initial metadata in \a initial_metadata, find an appropriate
-    target for this rpc, and 'return' it by calling \a on_complete after setting
-    \a target.
-    Picking can be asynchronous. Any IO should be done under \a pollent. */
+/** Find an appropriate target for this call, based on \a pick_args.
+    Picking can be synchronous or asynchronous. In the synchronous case, when a
+    pick is readily available, it'll be returned in \a target and a non-zero
+    value will be returned.
+    In the asynchronous case, zero is returned and \a on_complete will be called
+    once \a target and \a user_data have been set. Any IO should be done under
+    \a pick_args->pollent. The opaque \a user_data output argument corresponds
+    to information that may need be propagated from the LB policy. It may be
+    NULL. Errors are signaled by receiving a NULL \a *target. */
 int grpc_lb_policy_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-                        grpc_polling_entity *pollent,
-                        grpc_metadata_batch *initial_metadata,
-                        uint32_t initial_metadata_flags,
-                        grpc_connected_subchannel **target,
+                        const grpc_lb_policy_pick_args *pick_args,
+                        grpc_connected_subchannel **target, void **user_data,
                         grpc_closure *on_complete);
 
+/** Perform a connected subchannel ping (see \a grpc_connected_subchannel_ping)
+    against one of the connected subchannels managed by \a policy. */
 void grpc_lb_policy_ping_one(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                              grpc_closure *closure);
 
+/** Cancel picks for \a target.
+    The \a on_complete callback of the pending picks will be invoked with \a
+    *target set to NULL. */
 void grpc_lb_policy_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                                 grpc_connected_subchannel **target);
 
-/** Cancel all pending picks which have:
-    (initial_metadata_flags & initial_metadata_flags_mask) ==
-         initial_metadata_flags_eq */
+/** Cancel all pending picks for which their \a initial_metadata_flags (as given
+    in the call to \a grpc_lb_policy_pick) matches \a initial_metadata_flags_eq
+    when AND'd with \a initial_metadata_flags_mask */
 void grpc_lb_policy_cancel_picks(grpc_exec_ctx *exec_ctx,
                                  grpc_lb_policy *policy,
                                  uint32_t initial_metadata_flags_mask,
diff --git a/src/core/ext/client_config/lb_policy_factory.h b/src/core/ext/client_config/lb_policy_factory.h
index da1de3579a0c6b0dac1a5efba3aa205aa0832181..7191ca7d89b8936c3b097053e75b54bb8b28dd9a 100644
--- a/src/core/ext/client_config/lb_policy_factory.h
+++ b/src/core/ext/client_config/lb_policy_factory.h
@@ -47,8 +47,19 @@ struct grpc_lb_policy_factory {
   const grpc_lb_policy_factory_vtable *vtable;
 };
 
+/** A resolved address alongside any LB related information associated with it.
+ * \a user_data, if not NULL, contains opaque data meant to be consumed by the
+ * gRPC LB policy. Note that no all LB policies support \a user_data as input.
+ * Those who don't will simply ignore it and will correspondingly return NULL in
+ * their namesake pick() output argument. */
+typedef struct grpc_lb_address {
+  grpc_resolved_address *resolved_address;
+  void *user_data;
+} grpc_lb_address;
+
 typedef struct grpc_lb_policy_args {
-  grpc_resolved_addresses *addresses;
+  grpc_lb_address *addresses;
+  size_t num_addresses;
   grpc_client_channel_factory *client_channel_factory;
 } grpc_lb_policy_args;
 
diff --git a/src/core/ext/lb_policy/grpclb/grpclb.c b/src/core/ext/lb_policy/grpclb/grpclb.c
index af913d8a9df2e28d60904584a5dee926ca162446..cf3265833310d85f838805ea919a3e1dfeae9b05 100644
--- a/src/core/ext/lb_policy/grpclb/grpclb.c
+++ b/src/core/ext/lb_policy/grpclb/grpclb.c
@@ -76,9 +76,9 @@
  *    operations in progress over the old RR instance. This is done by
  *    decreasing the reference count on the old policy. The moment no more
  *    references are held on the old RR policy, it'll be destroyed and \a
- *    rr_connectivity_changed notified with a \a GRPC_CHANNEL_SHUTDOWN state.
- *    At this point we can transition to a new RR instance safely, which is done
- *    once again via \a rr_handover().
+ *    glb_rr_connectivity_changed notified with a \a GRPC_CHANNEL_SHUTDOWN
+ *    state. At this point we can transition to a new RR instance safely, which
+ *    is done once again via \a rr_handover().
  *
  *
  * Once a RR policy instance is in place (and getting updated as described),
@@ -96,6 +96,8 @@
  * - Implement LB service forwarding (point 2c. in the doc's diagram).
  */
 
+#include <errno.h>
+
 #include <string.h>
 
 #include <grpc/byte_buffer_reader.h>
@@ -109,18 +111,57 @@
 #include "src/core/ext/client_config/parse_address.h"
 #include "src/core/ext/lb_policy/grpclb/grpclb.h"
 #include "src/core/ext/lb_policy/grpclb/load_balancer_api.h"
+#include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/call.h"
 #include "src/core/lib/surface/channel.h"
+#include "src/core/lib/transport/static_metadata.h"
 
 int grpc_lb_glb_trace = 0;
 
+static void lb_addrs_destroy(grpc_lb_address *lb_addresses,
+                             size_t num_addresses) {
+  /* free "resolved" addresses memblock */
+  gpr_free(lb_addresses->resolved_address);
+  for (size_t i = 0; i < num_addresses; ++i) {
+    if (lb_addresses[i].user_data != NULL) {
+      GRPC_MDELEM_UNREF(lb_addresses[i].user_data);
+    }
+  }
+  gpr_free(lb_addresses);
+}
+
+/* add lb_token of selected subchannel (address) to the call's initial
+ * metadata */
+static void initial_metadata_add_lb_token(
+    grpc_metadata_batch *initial_metadata,
+    grpc_linked_mdelem *lb_token_mdelem_storage, grpc_mdelem *lb_token) {
+  GPR_ASSERT(lb_token_mdelem_storage != NULL);
+  GPR_ASSERT(lb_token != NULL);
+  grpc_metadata_batch_add_tail(initial_metadata, lb_token_mdelem_storage,
+                               lb_token);
+}
+
 typedef struct wrapped_rr_closure_arg {
   /* the original closure. Usually a on_complete/notify cb for pick() and ping()
    * calls against the internal RR instance, respectively. */
   grpc_closure *wrapped_closure;
 
+  /* the pick's initial metadata, kept in order to append the LB token for the
+   * pick */
+  grpc_metadata_batch *initial_metadata;
+
+  /* the picked target, used to determine which LB token to add to the pick's
+   * initial metadata */
+  grpc_connected_subchannel **target;
+
+  /* the LB token associated with the pick */
+  grpc_mdelem *lb_token;
+
+  /* storage for the lb token initial metadata mdelem */
+  grpc_linked_mdelem *lb_token_mdelem_storage;
+
   /* The RR instance related to the closure */
   grpc_lb_policy *rr_policy;
 
@@ -143,6 +184,11 @@ static void wrapped_rr_closure(grpc_exec_ctx *exec_ctx, void *arg,
     GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "wrapped_rr_closure");
   }
   GPR_ASSERT(wc_arg->wrapped_closure != NULL);
+
+  initial_metadata_add_lb_token(wc_arg->initial_metadata,
+                                wc_arg->lb_token_mdelem_storage,
+                                GRPC_MDELEM_REF(wc_arg->lb_token));
+
   grpc_exec_ctx_sched(exec_ctx, wc_arg->wrapped_closure, error, NULL);
   gpr_free(wc_arg->owning_pending_node);
 }
@@ -164,6 +210,9 @@ typedef struct pending_pick {
   /* the initial metadata for the pick. See grpc_lb_policy_pick() */
   grpc_metadata_batch *initial_metadata;
 
+  /* storage for the lb token initial metadata mdelem */
+  grpc_linked_mdelem *lb_token_mdelem_storage;
+
   /* bitmask passed to pick() and used for selective cancelling. See
    * grpc_lb_policy_cancel_picks() */
   uint32_t initial_metadata_flags;
@@ -180,20 +229,23 @@ typedef struct pending_pick {
   wrapped_rr_closure_arg wrapped_on_complete_arg;
 } pending_pick;
 
-static void add_pending_pick(pending_pick **root, grpc_polling_entity *pollent,
-                             grpc_metadata_batch *initial_metadata,
-                             uint32_t initial_metadata_flags,
+static void add_pending_pick(pending_pick **root,
+                             const grpc_lb_policy_pick_args *pick_args,
                              grpc_connected_subchannel **target,
                              grpc_closure *on_complete) {
   pending_pick *pp = gpr_malloc(sizeof(*pp));
   memset(pp, 0, sizeof(pending_pick));
   memset(&pp->wrapped_on_complete_arg, 0, sizeof(wrapped_rr_closure_arg));
   pp->next = *root;
-  pp->pollent = pollent;
+  pp->pollent = pick_args->pollent;
   pp->target = target;
-  pp->initial_metadata = initial_metadata;
-  pp->initial_metadata_flags = initial_metadata_flags;
+  pp->initial_metadata = pick_args->initial_metadata;
+  pp->initial_metadata_flags = pick_args->initial_metadata_flags;
+  pp->lb_token_mdelem_storage = pick_args->lb_token_mdelem_storage;
   pp->wrapped_on_complete_arg.wrapped_closure = on_complete;
+  pp->wrapped_on_complete_arg.initial_metadata = pick_args->initial_metadata;
+  pp->wrapped_on_complete_arg.lb_token_mdelem_storage =
+      pick_args->lb_token_mdelem_storage;
   grpc_closure_init(&pp->wrapped_on_complete, wrapped_rr_closure,
                     &pp->wrapped_on_complete_arg);
   *root = pp;
@@ -252,6 +304,12 @@ typedef struct glb_lb_policy {
    * response has arrived. */
   grpc_grpclb_serverlist *serverlist;
 
+  /** total number of valid addresses received in \a serverlist */
+  size_t num_ok_serverlist_addresses;
+
+  /** LB addresses from \a serverlist, \a num_ok_serverlist_addresses of them */
+  grpc_lb_address *lb_addresses;
+
   /** list of picks that are waiting on RR's policy connectivity */
   pending_pick *pending_picks;
 
@@ -279,58 +337,142 @@ struct rr_connectivity_data {
   glb_lb_policy *glb_policy;
 };
 
-static grpc_lb_policy *create_rr(grpc_exec_ctx *exec_ctx,
-                                 const grpc_grpclb_serverlist *serverlist,
-                                 glb_lb_policy *glb_policy) {
-  /* TODO(dgq): support mixed ip version */
-  GPR_ASSERT(serverlist != NULL && serverlist->num_servers > 0);
-  char **host_ports = gpr_malloc(sizeof(char *) * serverlist->num_servers);
-  for (size_t i = 0; i < serverlist->num_servers; ++i) {
-    gpr_join_host_port(&host_ports[i], serverlist->servers[i]->ip_address,
-                       serverlist->servers[i]->port);
+static bool is_server_valid(const grpc_grpclb_server *server, size_t idx,
+                            bool log) {
+  const grpc_grpclb_ip_address *ip = &server->ip_address;
+  if (server->port >> 16 != 0) {
+    if (log) {
+      gpr_log(GPR_ERROR,
+              "Invalid port '%d' at index %zu of serverlist. Ignoring.",
+              server->port, idx);
+    }
+    return false;
   }
 
-  size_t uri_path_len;
-  char *concat_ipports = gpr_strjoin_sep(
-      (const char **)host_ports, serverlist->num_servers, ",", &uri_path_len);
+  if (ip->size != 4 && ip->size != 16) {
+    if (log) {
+      gpr_log(GPR_ERROR,
+              "Expected IP to be 4 or 16 bytes, got %d at index %zu of "
+              "serverlist. Ignoring",
+              ip->size, idx);
+    }
+    return false;
+  }
+  return true;
+}
 
-  grpc_lb_policy_args args;
-  args.client_channel_factory = glb_policy->cc_factory;
-  args.addresses = gpr_malloc(sizeof(grpc_resolved_addresses));
-  args.addresses->naddrs = serverlist->num_servers;
-  args.addresses->addrs =
-      gpr_malloc(sizeof(grpc_resolved_address) * args.addresses->naddrs);
-  size_t out_addrs_idx = 0;
+/* populate \a addresses according to \a serverlist. Returns the number of
+ * addresses successfully parsed and added to \a addresses */
+static size_t process_serverlist(const grpc_grpclb_serverlist *serverlist,
+                                 grpc_lb_address **lb_addresses) {
+  size_t num_valid = 0;
+  /* first pass: count how many are valid in order to allocate the necessary
+   * memory in a single block */
   for (size_t i = 0; i < serverlist->num_servers; ++i) {
-    grpc_uri uri;
-    struct sockaddr_storage sa;
-    size_t sa_len;
-    uri.path = host_ports[i];
-    if (parse_ipv4(&uri, &sa, &sa_len)) { /* TODO(dgq): add support for ipv6 */
-      memcpy(args.addresses->addrs[out_addrs_idx].addr, &sa, sa_len);
-      args.addresses->addrs[out_addrs_idx].len = sa_len;
-      ++out_addrs_idx;
+    if (is_server_valid(serverlist->servers[i], i, true)) ++num_valid;
+  }
+  if (num_valid == 0) {
+    return 0;
+  }
+
+  /* allocate the memory block for the "resolved" addresses. */
+  grpc_resolved_address *r_addrs_memblock =
+      gpr_malloc(sizeof(grpc_resolved_address) * num_valid);
+  memset(r_addrs_memblock, 0, sizeof(grpc_resolved_address) * num_valid);
+  grpc_lb_address *lb_addrs = gpr_malloc(sizeof(grpc_lb_address) * num_valid);
+  memset(lb_addrs, 0, sizeof(grpc_lb_address) * num_valid);
+
+  /* second pass: actually populate the addresses and LB tokens (aka user data
+   * to the outside world) to be read by the RR policy during its creation.
+   * Given that the validity tests are very cheap, they are performed again
+   * instead of marking the valid ones during the first pass, as this would
+   * incurr in an allocation due to the arbitrary number of server */
+  size_t addr_idx = 0;
+  for (size_t sl_idx = 0; sl_idx < serverlist->num_servers; ++sl_idx) {
+    GPR_ASSERT(addr_idx < num_valid);
+    const grpc_grpclb_server *server = serverlist->servers[sl_idx];
+    if (!is_server_valid(serverlist->servers[sl_idx], sl_idx, false)) continue;
+    grpc_lb_address *const lb_addr = &lb_addrs[addr_idx];
+
+    /* address processing */
+    const uint16_t netorder_port = htons((uint16_t)server->port);
+    /* the addresses are given in binary format (a in(6)_addr struct) in
+     * server->ip_address.bytes. */
+    const grpc_grpclb_ip_address *ip = &server->ip_address;
+
+    lb_addr->resolved_address = &r_addrs_memblock[addr_idx];
+    struct sockaddr_storage *sa =
+        (struct sockaddr_storage *)lb_addr->resolved_address->addr;
+    size_t *sa_len = &lb_addr->resolved_address->len;
+    *sa_len = 0;
+    if (ip->size == 4) {
+      struct sockaddr_in *addr4 = (struct sockaddr_in *)sa;
+      *sa_len = sizeof(struct sockaddr_in);
+      memset(addr4, 0, *sa_len);
+      addr4->sin_family = AF_INET;
+      memcpy(&addr4->sin_addr, ip->bytes, ip->size);
+      addr4->sin_port = netorder_port;
+    } else if (ip->size == 16) {
+      struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)sa;
+      *sa_len = sizeof(struct sockaddr_in6);
+      memset(addr6, 0, *sa_len);
+      addr6->sin6_family = AF_INET;
+      memcpy(&addr6->sin6_addr, ip->bytes, ip->size);
+      addr6->sin6_port = netorder_port;
+    }
+    GPR_ASSERT(*sa_len > 0);
+
+    /* lb token processing */
+    if (server->has_load_balance_token) {
+      const size_t lb_token_size =
+          GPR_ARRAY_SIZE(server->load_balance_token) - 1;
+      grpc_mdstr *lb_token_mdstr = grpc_mdstr_from_buffer(
+          (uint8_t *)server->load_balance_token, lb_token_size);
+      lb_addr->user_data = grpc_mdelem_from_metadata_strings(
+          GRPC_MDSTR_LOAD_REPORTING_INITIAL, lb_token_mdstr);
     } else {
-      gpr_log(GPR_ERROR, "Invalid LB service address '%s', ignoring.",
-              host_ports[i]);
+      gpr_log(GPR_ERROR,
+              "Missing LB token for backend address '%s'. The empty token will "
+              "be used instead",
+              grpc_sockaddr_to_uri((struct sockaddr *)sa));
+      lb_addr->user_data = GRPC_MDELEM_LOAD_REPORTING_INITIAL_EMPTY;
     }
+    ++addr_idx;
   }
+  GPR_ASSERT(addr_idx == num_valid);
+  *lb_addresses = lb_addrs;
+  return num_valid;
+}
+
+static grpc_lb_policy *create_rr(grpc_exec_ctx *exec_ctx,
+                                 const grpc_grpclb_serverlist *serverlist,
+                                 glb_lb_policy *glb_policy) {
+  GPR_ASSERT(serverlist != NULL && serverlist->num_servers > 0);
+
+  grpc_lb_policy_args args;
+  memset(&args, 0, sizeof(args));
+  args.client_channel_factory = glb_policy->cc_factory;
+  const size_t num_ok_addresses =
+      process_serverlist(serverlist, &args.addresses);
+  args.num_addresses = num_ok_addresses;
 
   grpc_lb_policy *rr = grpc_lb_policy_create(exec_ctx, "round_robin", &args);
 
-  gpr_free(concat_ipports);
-  for (size_t i = 0; i < serverlist->num_servers; i++) {
-    gpr_free(host_ports[i]);
+  if (glb_policy->lb_addresses != NULL) {
+    /* dispose of the previous version */
+    lb_addrs_destroy(glb_policy->lb_addresses,
+                     glb_policy->num_ok_serverlist_addresses);
   }
-  gpr_free(host_ports);
-  gpr_free(args.addresses->addrs);
-  gpr_free(args.addresses);
+  glb_policy->num_ok_serverlist_addresses = num_ok_addresses;
+  glb_policy->lb_addresses = args.addresses;
+
   return rr;
 }
 
 static void rr_handover(grpc_exec_ctx *exec_ctx, glb_lb_policy *glb_policy,
                         grpc_error *error) {
-  GRPC_ERROR_REF(error);
+  GPR_ASSERT(glb_policy->serverlist != NULL &&
+             glb_policy->serverlist->num_servers > 0);
   glb_policy->rr_policy =
       create_rr(exec_ctx, glb_policy->serverlist, glb_policy);
 
@@ -345,8 +487,8 @@ static void rr_handover(grpc_exec_ctx *exec_ctx, glb_lb_policy *glb_policy,
       exec_ctx, glb_policy->rr_policy, &glb_policy->rr_connectivity->state,
       &glb_policy->rr_connectivity->on_change);
   grpc_connectivity_state_set(exec_ctx, &glb_policy->state_tracker,
-                              glb_policy->rr_connectivity->state, error,
-                              "rr_handover");
+                              glb_policy->rr_connectivity->state,
+                              GRPC_ERROR_REF(error), "rr_handover");
   grpc_lb_policy_exit_idle(exec_ctx, glb_policy->rr_policy);
 
   /* flush pending ops */
@@ -359,9 +501,12 @@ static void rr_handover(grpc_exec_ctx *exec_ctx, glb_lb_policy *glb_policy,
       gpr_log(GPR_INFO, "Pending pick about to PICK from 0x%" PRIxPTR "",
               (intptr_t)glb_policy->rr_policy);
     }
-    grpc_lb_policy_pick(exec_ctx, glb_policy->rr_policy, pp->pollent,
-                        pp->initial_metadata, pp->initial_metadata_flags,
-                        pp->target, &pp->wrapped_on_complete);
+    const grpc_lb_policy_pick_args pick_args = {
+        pp->pollent, pp->initial_metadata, pp->initial_metadata_flags,
+        pp->lb_token_mdelem_storage};
+    grpc_lb_policy_pick(exec_ctx, glb_policy->rr_policy, &pick_args, pp->target,
+                        (void **)&pp->wrapped_on_complete_arg.lb_token,
+                        &pp->wrapped_on_complete);
     pp->wrapped_on_complete_arg.owning_pending_node = pp;
   }
 
@@ -378,13 +523,13 @@ static void rr_handover(grpc_exec_ctx *exec_ctx, glb_lb_policy *glb_policy,
                             &pping->wrapped_notify);
     pping->wrapped_notify_arg.owning_pending_node = pping;
   }
-  GRPC_ERROR_UNREF(error);
 }
 
-static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
-                                    grpc_error *error) {
+static void glb_rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
+                                        grpc_error *error) {
   rr_connectivity_data *rr_conn_data = arg;
   glb_lb_policy *glb_policy = rr_conn_data->glb_policy;
+
   if (rr_conn_data->state == GRPC_CHANNEL_SHUTDOWN) {
     if (glb_policy->serverlist != NULL) {
       /* a RR policy is shutting down but there's a serverlist available ->
@@ -398,8 +543,8 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
     if (error == GRPC_ERROR_NONE) {
       /* RR not shutting down. Mimic the RR's policy state */
       grpc_connectivity_state_set(exec_ctx, &glb_policy->state_tracker,
-                                  rr_conn_data->state, error,
-                                  "rr_connectivity_changed");
+                                  rr_conn_data->state, GRPC_ERROR_REF(error),
+                                  "glb_rr_connectivity_changed");
       /* resubscribe */
       grpc_lb_policy_notify_on_state_change(exec_ctx, glb_policy->rr_policy,
                                             &rr_conn_data->state,
@@ -408,7 +553,6 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
       gpr_free(rr_conn_data);
     }
   }
-  GRPC_ERROR_UNREF(error);
 }
 
 static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
@@ -418,31 +562,43 @@ static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
   memset(glb_policy, 0, sizeof(*glb_policy));
 
   /* All input addresses in args->addresses come from a resolver that claims
-   * they are LB services. It's the resolver's responsibility to make sure this
+   * they are LB services. It's the resolver's responsibility to make sure
+   * this
    * policy is only instantiated and used in that case.
    *
    * Create a client channel over them to communicate with a LB service */
   glb_policy->cc_factory = args->client_channel_factory;
   GPR_ASSERT(glb_policy->cc_factory != NULL);
-  if (args->addresses->naddrs == 0) {
+  if (args->num_addresses == 0) {
     return NULL;
   }
 
-  /* construct a target from the args->addresses, in the form
+  if (args->addresses[0].user_data != NULL) {
+    gpr_log(GPR_ERROR,
+            "This LB policy doesn't support user data. It will be ignored");
+  }
+
+  /* construct a target from the addresses in args, given in the form
    * ipvX://ip1:port1,ip2:port2,...
    * TODO(dgq): support mixed ip version */
-  char **addr_strs = gpr_malloc(sizeof(char *) * args->addresses->naddrs);
-  addr_strs[0] =
-      grpc_sockaddr_to_uri((const struct sockaddr *)&args->addresses->addrs[0]);
-  for (size_t i = 1; i < args->addresses->naddrs; i++) {
-    GPR_ASSERT(grpc_sockaddr_to_string(
-                   &addr_strs[i],
-                   (const struct sockaddr *)&args->addresses->addrs[i],
-                   true) == 0);
+  char **addr_strs = gpr_malloc(sizeof(char *) * args->num_addresses);
+  addr_strs[0] = grpc_sockaddr_to_uri(
+      (const struct sockaddr *)&args->addresses[0].resolved_address->addr);
+  for (size_t i = 1; i < args->num_addresses; i++) {
+    if (args->addresses[i].user_data != NULL) {
+      gpr_log(GPR_ERROR,
+              "This LB policy doesn't support user data. It will be ignored");
+    }
+
+    GPR_ASSERT(
+        grpc_sockaddr_to_string(
+            &addr_strs[i],
+            (const struct sockaddr *)&args->addresses[i].resolved_address->addr,
+            true) == 0);
   }
   size_t uri_path_len;
   char *target_uri_str = gpr_strjoin_sep(
-      (const char **)addr_strs, args->addresses->naddrs, ",", &uri_path_len);
+      (const char **)addr_strs, args->num_addresses, ",", &uri_path_len);
 
   /* will pick using pick_first */
   glb_policy->lb_channel = grpc_client_channel_factory_create_channel(
@@ -450,7 +606,7 @@ static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
       GRPC_CLIENT_CHANNEL_TYPE_LOAD_BALANCING, NULL);
 
   gpr_free(target_uri_str);
-  for (size_t i = 0; i < args->addresses->naddrs; i++) {
+  for (size_t i = 0; i < args->num_addresses; i++) {
     gpr_free(addr_strs[i]);
   }
   gpr_free(addr_strs);
@@ -463,7 +619,7 @@ static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
   rr_connectivity_data *rr_connectivity =
       gpr_malloc(sizeof(rr_connectivity_data));
   memset(rr_connectivity, 0, sizeof(rr_connectivity_data));
-  grpc_closure_init(&rr_connectivity->on_change, rr_connectivity_changed,
+  grpc_closure_init(&rr_connectivity->on_change, glb_rr_connectivity_changed,
                     rr_connectivity);
   rr_connectivity->glb_policy = glb_policy;
   glb_policy->rr_connectivity = rr_connectivity;
@@ -486,6 +642,9 @@ static void glb_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
     grpc_grpclb_destroy_serverlist(glb_policy->serverlist);
   }
   gpr_mu_destroy(&glb_policy->mu);
+
+  lb_addrs_destroy(glb_policy->lb_addresses,
+                   glb_policy->num_ok_serverlist_addresses);
   gpr_free(glb_policy);
 }
 
@@ -546,7 +705,6 @@ static void glb_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
       *target = NULL;
       grpc_exec_ctx_sched(exec_ctx, &pp->wrapped_on_complete,
                           GRPC_ERROR_CANCELLED, NULL);
-      gpr_free(pp);
     } else {
       pp->next = glb_policy->pending_picks;
       glb_policy->pending_picks = pp;
@@ -576,7 +734,6 @@ static void glb_cancel_picks(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
           exec_ctx, pp->pollent, glb_policy->base.interested_parties);
       grpc_exec_ctx_sched(exec_ctx, &pp->wrapped_on_complete,
                           GRPC_ERROR_CANCELLED, NULL);
-      gpr_free(pp);
     } else {
       pp->next = glb_policy->pending_picks;
       glb_policy->pending_picks = pp;
@@ -603,12 +760,21 @@ static void glb_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
 }
 
 static int glb_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                    grpc_polling_entity *pollent,
-                    grpc_metadata_batch *initial_metadata,
-                    uint32_t initial_metadata_flags,
-                    grpc_connected_subchannel **target,
+                    const grpc_lb_policy_pick_args *pick_args,
+                    grpc_connected_subchannel **target, void **user_data,
                     grpc_closure *on_complete) {
   glb_lb_policy *glb_policy = (glb_lb_policy *)pol;
+
+  if (pick_args->lb_token_mdelem_storage == NULL) {
+    *target = NULL;
+    grpc_exec_ctx_sched(
+        exec_ctx, on_complete,
+        GRPC_ERROR_CREATE("No mdelem storage for the LB token. Load reporting "
+                          "won't work without it. Failing"),
+        NULL);
+    return 1;
+  }
+
   gpr_mu_lock(&glb_policy->mu);
   int r;
 
@@ -621,28 +787,34 @@ static int glb_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
     memset(&glb_policy->wc_arg, 0, sizeof(wrapped_rr_closure_arg));
     glb_policy->wc_arg.rr_policy = glb_policy->rr_policy;
     glb_policy->wc_arg.wrapped_closure = on_complete;
+    glb_policy->wc_arg.lb_token_mdelem_storage =
+        pick_args->lb_token_mdelem_storage;
+    glb_policy->wc_arg.initial_metadata = pick_args->initial_metadata;
+    glb_policy->wc_arg.owning_pending_node = NULL;
     grpc_closure_init(&glb_policy->wrapped_on_complete, wrapped_rr_closure,
                       &glb_policy->wc_arg);
-    r = grpc_lb_policy_pick(exec_ctx, glb_policy->rr_policy, pollent,
-                            initial_metadata, initial_metadata_flags, target,
+
+    r = grpc_lb_policy_pick(exec_ctx, glb_policy->rr_policy, pick_args, target,
+                            (void **)&glb_policy->wc_arg.lb_token,
                             &glb_policy->wrapped_on_complete);
     if (r != 0) {
-      /* the call to grpc_lb_policy_pick has been sychronous. Unreffing the RR
-       * policy and notify the original callback */
-      glb_policy->wc_arg.wrapped_closure = NULL;
+      /* synchronous grpc_lb_policy_pick call. Unref the RR policy. */
       if (grpc_lb_glb_trace) {
         gpr_log(GPR_INFO, "Unreffing RR (0x%" PRIxPTR ")",
                 (intptr_t)glb_policy->wc_arg.rr_policy);
       }
       GRPC_LB_POLICY_UNREF(exec_ctx, glb_policy->wc_arg.rr_policy, "glb_pick");
-      grpc_exec_ctx_sched(exec_ctx, glb_policy->wc_arg.wrapped_closure,
-                          GRPC_ERROR_NONE, NULL);
+
+      /* add the load reporting initial metadata */
+      initial_metadata_add_lb_token(
+          pick_args->initial_metadata, pick_args->lb_token_mdelem_storage,
+          GRPC_MDELEM_REF(glb_policy->wc_arg.lb_token));
     }
   } else {
-    grpc_polling_entity_add_to_pollset_set(exec_ctx, pollent,
+    grpc_polling_entity_add_to_pollset_set(exec_ctx, pick_args->pollent,
                                            glb_policy->base.interested_parties);
-    add_pending_pick(&glb_policy->pending_picks, pollent, initial_metadata,
-                     initial_metadata_flags, target, on_complete);
+    add_pending_pick(&glb_policy->pending_picks, pick_args, target,
+                     on_complete);
 
     if (!glb_policy->started_picking) {
       start_picking(exec_ctx, glb_policy);
@@ -702,9 +874,6 @@ typedef struct lb_client_data {
   /* called once initial metadata's been sent */
   grpc_closure md_sent;
 
-  /* called once initial metadata's been received */
-  grpc_closure md_rcvd;
-
   /* called once the LoadBalanceRequest has been sent to the LB server. See
    * src/proto/grpc/.../load_balancer.proto */
   grpc_closure req_sent;
@@ -741,7 +910,6 @@ typedef struct lb_client_data {
 } lb_client_data;
 
 static void md_sent_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error);
-static void md_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error);
 static void req_sent_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error);
 static void res_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error);
 static void close_sent_cb(grpc_exec_ctx *exec_ctx, void *arg,
@@ -756,7 +924,6 @@ static lb_client_data *lb_client_data_create(glb_lb_policy *glb_policy) {
   gpr_mu_init(&lb_client->mu);
   grpc_closure_init(&lb_client->md_sent, md_sent_cb, lb_client);
 
-  grpc_closure_init(&lb_client->md_rcvd, md_recv_cb, lb_client);
   grpc_closure_init(&lb_client->req_sent, req_sent_cb, lb_client);
   grpc_closure_init(&lb_client->res_rcvd, res_recv_cb, lb_client);
   grpc_closure_init(&lb_client->close_sent, close_sent_cb, lb_client);
@@ -855,23 +1022,6 @@ static void md_sent_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   grpc_op ops[1];
   memset(ops, 0, sizeof(ops));
   grpc_op *op = ops;
-  op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &lb_client->initial_metadata_recv;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  grpc_call_error call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, lb_client->lb_call, ops, (size_t)(op - ops),
-      &lb_client->md_rcvd);
-  GPR_ASSERT(GRPC_CALL_OK == call_error);
-}
-
-static void md_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  lb_client_data *lb_client = arg;
-  GPR_ASSERT(lb_client->lb_call);
-  grpc_op ops[1];
-  memset(ops, 0, sizeof(ops));
-  grpc_op *op = ops;
 
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message = lb_client->request_payload;
@@ -886,11 +1036,18 @@ static void md_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
 
 static void req_sent_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   lb_client_data *lb_client = arg;
+  GPR_ASSERT(lb_client->lb_call);
 
-  grpc_op ops[1];
+  grpc_op ops[2];
   memset(ops, 0, sizeof(ops));
   grpc_op *op = ops;
 
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &lb_client->initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message = &lb_client->response_payload;
   op->flags = 0;
@@ -909,8 +1066,7 @@ static void res_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   grpc_op *op = ops;
   if (lb_client->response_payload != NULL) {
     /* Received data from the LB server. Look inside
-     * lb_client->response_payload, for
-     * a serverlist. */
+     * lb_client->response_payload, for a serverlist. */
     grpc_byte_buffer_reader bbr;
     grpc_byte_buffer_reader_init(&bbr, lb_client->response_payload);
     gpr_slice response_slice = grpc_byte_buffer_reader_readall(&bbr);
@@ -947,7 +1103,7 @@ static void res_recv_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
         } else {
           /* unref the RR policy, eventually leading to its substitution with a
            * new one constructed from the received serverlist (see
-           * rr_connectivity_changed) */
+           * glb_rr_connectivity_changed) */
           GRPC_LB_POLICY_UNREF(exec_ctx, lb_client->glb_policy->rr_policy,
                                "serverlist_received");
         }
@@ -1010,8 +1166,8 @@ static void srv_status_rcvd_cb(grpc_exec_ctx *exec_ctx, void *arg,
             lb_client->status, lb_client->status_details,
             lb_client->status_details_capacity);
   }
-  /* TODO(dgq): deal with stream termination properly (fire up another one? fail
-   * the original call?) */
+  /* TODO(dgq): deal with stream termination properly (fire up another one?
+   * fail the original call?) */
 }
 
 /* Code wiring the policy with the rest of the core */
diff --git a/src/core/ext/lb_policy/grpclb/load_balancer_api.c b/src/core/ext/lb_policy/grpclb/load_balancer_api.c
index f4720a13455209dfc0d7623d93b4b7f30f30b1a7..a8881004a066a2ab4f7ee6ce09f134f61cb7140c 100644
--- a/src/core/ext/lb_policy/grpclb/load_balancer_api.c
+++ b/src/core/ext/lb_policy/grpclb/load_balancer_api.c
@@ -57,6 +57,7 @@ static bool decode_serverlist(pb_istream_t *stream, const pb_field_t *field,
   if (dec_arg->first_pass) { /* count how many server do we have */
     grpc_grpclb_server server;
     if (!pb_decode(stream, grpc_lb_v1_Server_fields, &server)) {
+      gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(stream));
       return false;
     }
     dec_arg->num_servers++;
@@ -69,6 +70,7 @@ static bool decode_serverlist(pb_istream_t *stream, const pb_field_t *field,
           gpr_malloc(sizeof(grpc_grpclb_server *) * dec_arg->num_servers);
     }
     if (!pb_decode(stream, grpc_lb_v1_Server_fields, server)) {
+      gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(stream));
       return false;
     }
     dec_arg->servers[dec_arg->decoding_idx++] = server;
@@ -118,6 +120,7 @@ grpc_grpclb_initial_response *grpc_grpclb_initial_response_parse(
   grpc_grpclb_response res;
   memset(&res, 0, sizeof(grpc_grpclb_response));
   if (!pb_decode(&stream, grpc_lb_v1_LoadBalanceResponse_fields, &res)) {
+    gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(&stream));
     return NULL;
   }
   grpc_grpclb_initial_response *initial_res =
@@ -145,6 +148,7 @@ grpc_grpclb_serverlist *grpc_grpclb_response_parse_serverlist(
   arg.first_pass = true;
   status = pb_decode(&stream, grpc_lb_v1_LoadBalanceResponse_fields, &res);
   if (!status) {
+    gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(&stream));
     return NULL;
   }
 
@@ -152,6 +156,7 @@ grpc_grpclb_serverlist *grpc_grpclb_response_parse_serverlist(
   status =
       pb_decode(&stream_at_start, grpc_lb_v1_LoadBalanceResponse_fields, &res);
   if (!status) {
+    gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(&stream));
     return NULL;
   }
 
diff --git a/src/core/ext/lb_policy/grpclb/load_balancer_api.h b/src/core/ext/lb_policy/grpclb/load_balancer_api.h
index 9726c87a37fb5e685acb5402693bab7966235602..c1e73d08effcecce8d3ab7a35445634eb32dc907 100644
--- a/src/core/ext/lb_policy/grpclb/load_balancer_api.h
+++ b/src/core/ext/lb_policy/grpclb/load_balancer_api.h
@@ -45,6 +45,7 @@ extern "C" {
 
 #define GRPC_GRPCLB_SERVICE_NAME_MAX_LENGTH 128
 
+typedef grpc_lb_v1_Server_ip_address_t grpc_grpclb_ip_address;
 typedef grpc_lb_v1_LoadBalanceRequest grpc_grpclb_request;
 typedef grpc_lb_v1_InitialLoadBalanceResponse grpc_grpclb_initial_response;
 typedef grpc_lb_v1_Server grpc_grpclb_server;
diff --git a/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
index 52e11c40bb0dca24b11ad726f485c76db12bbe69..2676714175a095ad8c9839903af252f9eecac53d 100644
--- a/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
+++ b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
@@ -31,10 +31,11 @@
  *
  */
 /* Automatically generated nanopb constant definitions */
-/* Generated by nanopb-0.3.5-dev */
+/* Generated by nanopb-0.3.7-dev */
 
 #include "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h"
 
+/* @@protoc_insertion_point(includes) */
 #if PB_PROTO_HEADER_VERSION != 30
 #error Regenerate this file with the current version of nanopb generator.
 #endif
@@ -72,7 +73,7 @@ const pb_field_t grpc_lb_v1_LoadBalanceResponse_fields[3] = {
 };
 
 const pb_field_t grpc_lb_v1_InitialLoadBalanceResponse_fields[3] = {
-    PB_FIELD(  2, STRING  , OPTIONAL, STATIC  , FIRST, grpc_lb_v1_InitialLoadBalanceResponse, load_balancer_delegate, load_balancer_delegate, 0),
+    PB_FIELD(  1, STRING  , OPTIONAL, STATIC  , FIRST, grpc_lb_v1_InitialLoadBalanceResponse, load_balancer_delegate, load_balancer_delegate, 0),
     PB_FIELD(  3, MESSAGE , OPTIONAL, STATIC  , OTHER, grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval, load_balancer_delegate, &grpc_lb_v1_Duration_fields),
     PB_LAST_FIELD
 };
@@ -84,7 +85,7 @@ const pb_field_t grpc_lb_v1_ServerList_fields[3] = {
 };
 
 const pb_field_t grpc_lb_v1_Server_fields[5] = {
-    PB_FIELD(  1, STRING  , OPTIONAL, STATIC  , FIRST, grpc_lb_v1_Server, ip_address, ip_address, 0),
+    PB_FIELD(  1, BYTES   , OPTIONAL, STATIC  , FIRST, grpc_lb_v1_Server, ip_address, ip_address, 0),
     PB_FIELD(  2, INT32   , OPTIONAL, STATIC  , OTHER, grpc_lb_v1_Server, port, ip_address, 0),
     PB_FIELD(  3, STRING  , OPTIONAL, STATIC  , OTHER, grpc_lb_v1_Server, load_balance_token, port, 0),
     PB_FIELD(  4, BOOL    , OPTIONAL, STATIC  , OTHER, grpc_lb_v1_Server, drop_request, load_balance_token, 0),
@@ -116,3 +117,4 @@ PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request)
 #endif
 
 
+/* @@protoc_insertion_point(eof) */
diff --git a/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
index 46fe588f72d930f63d3295a52a2482e3e2be9b63..4f1031ec7bc4804e16a2fe0cbe7d777a65b7b939 100644
--- a/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
+++ b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
@@ -31,11 +31,12 @@
  *
  */
 /* Automatically generated nanopb header */
-/* Generated by nanopb-0.3.5-dev */
+/* Generated by nanopb-0.3.7-dev */
 
-#ifndef GRPC_CORE_EXT_LB_POLICY_GRPCLB_PROTO_GRPC_LB_V1_LOAD_BALANCER_PB_H
-#define GRPC_CORE_EXT_LB_POLICY_GRPCLB_PROTO_GRPC_LB_V1_LOAD_BALANCER_PB_H
+#ifndef PB_GRPC_LB_V1_LOAD_BALANCER_PB_H_INCLUDED
+#define PB_GRPC_LB_V1_LOAD_BALANCER_PB_H_INCLUDED
 #include "third_party/nanopb/pb.h"
+/* @@protoc_insertion_point(includes) */
 #if PB_PROTO_HEADER_VERSION != 30
 #error Regenerate this file with the current version of nanopb generator.
 #endif
@@ -52,6 +53,7 @@ typedef struct _grpc_lb_v1_ClientStats {
     int64_t client_rpc_errors;
     bool has_dropped_requests;
     int64_t dropped_requests;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_ClientStats) */
 } grpc_lb_v1_ClientStats;
 
 typedef struct _grpc_lb_v1_Duration {
@@ -59,22 +61,26 @@ typedef struct _grpc_lb_v1_Duration {
     int64_t seconds;
     bool has_nanos;
     int32_t nanos;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_Duration) */
 } grpc_lb_v1_Duration;
 
 typedef struct _grpc_lb_v1_InitialLoadBalanceRequest {
     bool has_name;
     char name[128];
+/* @@protoc_insertion_point(struct:grpc_lb_v1_InitialLoadBalanceRequest) */
 } grpc_lb_v1_InitialLoadBalanceRequest;
 
+typedef PB_BYTES_ARRAY_T(16) grpc_lb_v1_Server_ip_address_t;
 typedef struct _grpc_lb_v1_Server {
     bool has_ip_address;
-    char ip_address[46];
+    grpc_lb_v1_Server_ip_address_t ip_address;
     bool has_port;
     int32_t port;
     bool has_load_balance_token;
-    char load_balance_token[64];
+    char load_balance_token[65];
     bool has_drop_request;
     bool drop_request;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_Server) */
 } grpc_lb_v1_Server;
 
 typedef struct _grpc_lb_v1_InitialLoadBalanceResponse {
@@ -82,6 +88,7 @@ typedef struct _grpc_lb_v1_InitialLoadBalanceResponse {
     char load_balancer_delegate[64];
     bool has_client_stats_report_interval;
     grpc_lb_v1_Duration client_stats_report_interval;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_InitialLoadBalanceResponse) */
 } grpc_lb_v1_InitialLoadBalanceResponse;
 
 typedef struct _grpc_lb_v1_LoadBalanceRequest {
@@ -89,12 +96,14 @@ typedef struct _grpc_lb_v1_LoadBalanceRequest {
     grpc_lb_v1_InitialLoadBalanceRequest initial_request;
     bool has_client_stats;
     grpc_lb_v1_ClientStats client_stats;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_LoadBalanceRequest) */
 } grpc_lb_v1_LoadBalanceRequest;
 
 typedef struct _grpc_lb_v1_ServerList {
     pb_callback_t servers;
     bool has_expiration_interval;
     grpc_lb_v1_Duration expiration_interval;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_ServerList) */
 } grpc_lb_v1_ServerList;
 
 typedef struct _grpc_lb_v1_LoadBalanceResponse {
@@ -102,6 +111,7 @@ typedef struct _grpc_lb_v1_LoadBalanceResponse {
     grpc_lb_v1_InitialLoadBalanceResponse initial_response;
     bool has_server_list;
     grpc_lb_v1_ServerList server_list;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_LoadBalanceResponse) */
 } grpc_lb_v1_LoadBalanceResponse;
 
 /* Default values for struct fields */
@@ -114,7 +124,7 @@ typedef struct _grpc_lb_v1_LoadBalanceResponse {
 #define grpc_lb_v1_LoadBalanceResponse_init_default {false, grpc_lb_v1_InitialLoadBalanceResponse_init_default, false, grpc_lb_v1_ServerList_init_default}
 #define grpc_lb_v1_InitialLoadBalanceResponse_init_default {false, "", false, grpc_lb_v1_Duration_init_default}
 #define grpc_lb_v1_ServerList_init_default       {{{NULL}, NULL}, false, grpc_lb_v1_Duration_init_default}
-#define grpc_lb_v1_Server_init_default           {false, "", false, 0, false, "", false, 0}
+#define grpc_lb_v1_Server_init_default           {false, {0, {0}}, false, 0, false, "", false, 0}
 #define grpc_lb_v1_Duration_init_zero            {false, 0, false, 0}
 #define grpc_lb_v1_LoadBalanceRequest_init_zero  {false, grpc_lb_v1_InitialLoadBalanceRequest_init_zero, false, grpc_lb_v1_ClientStats_init_zero}
 #define grpc_lb_v1_InitialLoadBalanceRequest_init_zero {false, ""}
@@ -122,7 +132,7 @@ typedef struct _grpc_lb_v1_LoadBalanceResponse {
 #define grpc_lb_v1_LoadBalanceResponse_init_zero {false, grpc_lb_v1_InitialLoadBalanceResponse_init_zero, false, grpc_lb_v1_ServerList_init_zero}
 #define grpc_lb_v1_InitialLoadBalanceResponse_init_zero {false, "", false, grpc_lb_v1_Duration_init_zero}
 #define grpc_lb_v1_ServerList_init_zero          {{{NULL}, NULL}, false, grpc_lb_v1_Duration_init_zero}
-#define grpc_lb_v1_Server_init_zero              {false, "", false, 0, false, "", false, 0}
+#define grpc_lb_v1_Server_init_zero              {false, {0, {0}}, false, 0, false, "", false, 0}
 
 /* Field tags (for use in manual encoding/decoding) */
 #define grpc_lb_v1_ClientStats_total_requests_tag 1
@@ -135,7 +145,7 @@ typedef struct _grpc_lb_v1_LoadBalanceResponse {
 #define grpc_lb_v1_Server_port_tag               2
 #define grpc_lb_v1_Server_load_balance_token_tag 3
 #define grpc_lb_v1_Server_drop_request_tag       4
-#define grpc_lb_v1_InitialLoadBalanceResponse_load_balancer_delegate_tag 2
+#define grpc_lb_v1_InitialLoadBalanceResponse_load_balancer_delegate_tag 1
 #define grpc_lb_v1_InitialLoadBalanceResponse_client_stats_report_interval_tag 3
 #define grpc_lb_v1_LoadBalanceRequest_initial_request_tag 1
 #define grpc_lb_v1_LoadBalanceRequest_client_stats_tag 2
@@ -161,7 +171,8 @@ extern const pb_field_t grpc_lb_v1_Server_fields[5];
 #define grpc_lb_v1_ClientStats_size              33
 #define grpc_lb_v1_LoadBalanceResponse_size      (98 + grpc_lb_v1_ServerList_size)
 #define grpc_lb_v1_InitialLoadBalanceResponse_size 90
-#define grpc_lb_v1_Server_size                   127
+/* grpc_lb_v1_ServerList_size depends on runtime parameters */
+#define grpc_lb_v1_Server_size                   98
 
 /* Message IDs (where set with "msgid" option) */
 #ifdef PB_MSGID
@@ -174,5 +185,6 @@ extern const pb_field_t grpc_lb_v1_Server_fields[5];
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
+/* @@protoc_insertion_point(eof) */
 
 #endif
diff --git a/src/core/ext/lb_policy/pick_first/pick_first.c b/src/core/ext/lb_policy/pick_first/pick_first.c
index 9decf70692a5994e43d5e4d9bfd88fe7dc00fcd0..9513078dce6fa43ef2cce170d809404649fdf01f 100644
--- a/src/core/ext/lb_policy/pick_first/pick_first.c
+++ b/src/core/ext/lb_policy/pick_first/pick_first.c
@@ -199,10 +199,8 @@ static void pf_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
 }
 
 static int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                   grpc_polling_entity *pollent,
-                   grpc_metadata_batch *initial_metadata,
-                   uint32_t initial_metadata_flags,
-                   grpc_connected_subchannel **target,
+                   const grpc_lb_policy_pick_args *pick_args,
+                   grpc_connected_subchannel **target, void **user_data,
                    grpc_closure *on_complete) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   pending_pick *pp;
@@ -225,13 +223,13 @@ static int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
     if (!p->started_picking) {
       start_picking(exec_ctx, p);
     }
-    grpc_polling_entity_add_to_pollset_set(exec_ctx, pollent,
+    grpc_polling_entity_add_to_pollset_set(exec_ctx, pick_args->pollent,
                                            p->base.interested_parties);
     pp = gpr_malloc(sizeof(*pp));
     pp->next = p->pending_picks;
-    pp->pollent = pollent;
+    pp->pollent = pick_args->pollent;
     pp->target = target;
-    pp->initial_metadata_flags = initial_metadata_flags;
+    pp->initial_metadata_flags = pick_args->initial_metadata_flags;
     pp->on_complete = on_complete;
     p->pending_picks = pp;
     gpr_mu_unlock(&p->mu);
@@ -443,20 +441,25 @@ static grpc_lb_policy *create_pick_first(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(args->addresses != NULL);
   GPR_ASSERT(args->client_channel_factory != NULL);
 
-  if (args->addresses->naddrs == 0) return NULL;
+  if (args->num_addresses == 0) return NULL;
 
   pick_first_lb_policy *p = gpr_malloc(sizeof(*p));
   memset(p, 0, sizeof(*p));
 
-  p->subchannels =
-      gpr_malloc(sizeof(grpc_subchannel *) * args->addresses->naddrs);
-  memset(p->subchannels, 0, sizeof(*p->subchannels) * args->addresses->naddrs);
+  p->subchannels = gpr_malloc(sizeof(grpc_subchannel *) * args->num_addresses);
+  memset(p->subchannels, 0, sizeof(*p->subchannels) * args->num_addresses);
   grpc_subchannel_args sc_args;
   size_t subchannel_idx = 0;
-  for (size_t i = 0; i < args->addresses->naddrs; i++) {
+  for (size_t i = 0; i < args->num_addresses; i++) {
+    if (args->addresses[i].user_data != NULL) {
+      gpr_log(GPR_ERROR,
+              "This LB policy doesn't support user data. It will be ignored");
+    }
+
     memset(&sc_args, 0, sizeof(grpc_subchannel_args));
-    sc_args.addr = (struct sockaddr *)(args->addresses->addrs[i].addr);
-    sc_args.addr_len = (size_t)args->addresses->addrs[i].len;
+    sc_args.addr =
+        (struct sockaddr *)(args->addresses[i].resolved_address->addr);
+    sc_args.addr_len = (size_t)args->addresses[i].resolved_address->len;
 
     grpc_subchannel *subchannel = grpc_client_channel_factory_create_subchannel(
         exec_ctx, args->client_channel_factory, &sc_args);
diff --git a/src/core/ext/lb_policy/round_robin/round_robin.c b/src/core/ext/lb_policy/round_robin/round_robin.c
index 7bcf608ab9b46273efb5138a2b1368e87aafc3c7..a9c37ac0f15c83d3f8987cc0069b38fa863e5430 100644
--- a/src/core/ext/lb_policy/round_robin/round_robin.c
+++ b/src/core/ext/lb_policy/round_robin/round_robin.c
@@ -66,6 +66,7 @@
 #include "src/core/ext/client_config/lb_policy_registry.h"
 #include "src/core/lib/debug/trace.h"
 #include "src/core/lib/transport/connectivity_state.h"
+#include "src/core/lib/transport/static_metadata.h"
 
 typedef struct round_robin_lb_policy round_robin_lb_policy;
 
@@ -76,15 +77,32 @@ int grpc_lb_round_robin_trace = 0;
  * Once a pick is available, \a target is updated and \a on_complete called. */
 typedef struct pending_pick {
   struct pending_pick *next;
+
+  /* polling entity for the pick()'s async notification */
   grpc_polling_entity *pollent;
+
+  /* output argument where to store the pick()ed user_data. It'll be NULL if no
+   * such data is present or there's an error (the definite test for errors is
+   * \a target being NULL). */
+  void **user_data;
+
+  /* bitmask passed to pick() and used for selective cancelling. See
+   * grpc_lb_policy_cancel_picks() */
   uint32_t initial_metadata_flags;
+
+  /* output argument where to store the pick()ed connected subchannel, or NULL
+   * upon error. */
   grpc_connected_subchannel **target;
+
+  /* to be invoked once the pick() has completed (regardless of success) */
   grpc_closure *on_complete;
 } pending_pick;
 
 /** List of subchannels in a connectivity READY state */
 typedef struct ready_list {
   grpc_subchannel *subchannel;
+  /* references namesake entry in subchannel_data */
+  void *user_data;
   struct ready_list *next;
   struct ready_list *prev;
 } ready_list;
@@ -102,12 +120,21 @@ typedef struct {
   ready_list *ready_list_node;
   /** last observed connectivity */
   grpc_connectivity_state connectivity_state;
+  /** the subchannel's target user data */
+  void *user_data;
 } subchannel_data;
 
 struct round_robin_lb_policy {
   /** base policy: must be first */
   grpc_lb_policy base;
 
+  /** total number of addresses received at creation time */
+  size_t num_addresses;
+  /** array holding the borrowed and opaque pointers to incoming user data, one
+   * per incoming address.  These individual pointers will be returned as-is in
+   * successful picks. */
+  void **user_data_pointers;
+
   /** all our subchannels */
   size_t num_subchannels;
   subchannel_data **subchannels;
@@ -166,16 +193,19 @@ static void advance_last_picked_locked(round_robin_lb_policy *p) {
 
   if (grpc_lb_round_robin_trace) {
     gpr_log(GPR_DEBUG, "[READYLIST] ADVANCED LAST PICK. NOW AT NODE %p (SC %p)",
-            p->ready_list_last_pick, p->ready_list_last_pick->subchannel);
+            (void *)p->ready_list_last_pick,
+            (void *)p->ready_list_last_pick->subchannel);
   }
 }
 
 /** Prepends (relative to the root at p->ready_list) the connected subchannel \a
  * csc to the list of ready subchannels. */
 static ready_list *add_connected_sc_locked(round_robin_lb_policy *p,
-                                           grpc_subchannel *sc) {
+                                           subchannel_data *sd) {
   ready_list *new_elem = gpr_malloc(sizeof(ready_list));
-  new_elem->subchannel = sc;
+  memset(new_elem, 0, sizeof(ready_list));
+  new_elem->subchannel = sd->subchannel;
+  new_elem->user_data = sd->user_data;
   if (p->ready_list.prev == NULL) {
     /* first element */
     new_elem->next = &p->ready_list;
@@ -189,7 +219,8 @@ static ready_list *add_connected_sc_locked(round_robin_lb_policy *p,
     p->ready_list.prev = new_elem;
   }
   if (grpc_lb_round_robin_trace) {
-    gpr_log(GPR_DEBUG, "[READYLIST] ADDING NODE %p (SC %p)", new_elem, sc);
+    gpr_log(GPR_DEBUG, "[READYLIST] ADDING NODE %p (Conn. SC %p)",
+            (void *)new_elem, (void *)sd->subchannel);
   }
   return new_elem;
 }
@@ -216,8 +247,8 @@ static void remove_disconnected_sc_locked(round_robin_lb_policy *p,
   }
 
   if (grpc_lb_round_robin_trace) {
-    gpr_log(GPR_DEBUG, "[READYLIST] REMOVED NODE %p (SC %p)", node,
-            node->subchannel);
+    gpr_log(GPR_DEBUG, "[READYLIST] REMOVED NODE %p (SC %p)", (void *)node,
+            (void *)node->subchannel);
   }
 
   node->next = NULL;
@@ -229,9 +260,8 @@ static void remove_disconnected_sc_locked(round_robin_lb_policy *p,
 
 static void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
-  size_t i;
   ready_list *elem;
-  for (i = 0; i < p->num_subchannels; i++) {
+  for (size_t i = 0; i < p->num_subchannels; i++) {
     subchannel_data *sd = p->subchannels[i];
     GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, "round_robin");
     gpr_free(sd);
@@ -251,6 +281,8 @@ static void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
     gpr_free(elem);
     elem = tmp;
   }
+
+  gpr_free(p->user_data_pointers);
   gpr_free(p);
 }
 
@@ -337,7 +369,7 @@ static void start_picking(grpc_exec_ctx *exec_ctx, round_robin_lb_policy *p) {
   p->started_picking = 1;
 
   if (grpc_lb_round_robin_trace) {
-    gpr_log(GPR_DEBUG, "LB_POLICY: p=%p num_subchannels=%" PRIuPTR, p,
+    gpr_log(GPR_DEBUG, "LB_POLICY: p=%p num_subchannels=%" PRIuPTR, (void *)p,
             p->num_subchannels);
   }
 
@@ -361,38 +393,43 @@ static void rr_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
 }
 
 static int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                   grpc_polling_entity *pollent,
-                   grpc_metadata_batch *initial_metadata,
-                   uint32_t initial_metadata_flags,
-                   grpc_connected_subchannel **target,
+                   const grpc_lb_policy_pick_args *pick_args,
+                   grpc_connected_subchannel **target, void **user_data,
                    grpc_closure *on_complete) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   pending_pick *pp;
   ready_list *selected;
   gpr_mu_lock(&p->mu);
   if ((selected = peek_next_connected_locked(p))) {
+    /* readily available, report right away */
     gpr_mu_unlock(&p->mu);
     *target = grpc_subchannel_get_connected_subchannel(selected->subchannel);
+
+    if (user_data != NULL) {
+      *user_data = selected->user_data;
+    }
     if (grpc_lb_round_robin_trace) {
       gpr_log(GPR_DEBUG,
-              "[RR PICK] TARGET <-- CONNECTED SUBCHANNEL %p (NODE %p)", *target,
-              selected);
+              "[RR PICK] TARGET <-- CONNECTED SUBCHANNEL %p (NODE %p)",
+              (void *)*target, (void *)selected);
     }
     /* only advance the last picked pointer if the selection was used */
     advance_last_picked_locked(p);
     return 1;
   } else {
+    /* no pick currently available. Save for later in list of pending picks */
     if (!p->started_picking) {
       start_picking(exec_ctx, p);
     }
-    grpc_polling_entity_add_to_pollset_set(exec_ctx, pollent,
+    grpc_polling_entity_add_to_pollset_set(exec_ctx, pick_args->pollent,
                                            p->base.interested_parties);
     pp = gpr_malloc(sizeof(*pp));
     pp->next = p->pending_picks;
-    pp->pollent = pollent;
+    pp->pollent = pick_args->pollent;
     pp->target = target;
     pp->on_complete = on_complete;
-    pp->initial_metadata_flags = initial_metadata_flags;
+    pp->initial_metadata_flags = pick_args->initial_metadata_flags;
+    pp->user_data = user_data;
     p->pending_picks = pp;
     gpr_mu_unlock(&p->mu);
     return 0;
@@ -421,7 +458,7 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
                                     "connecting_ready");
         /* add the newly connected subchannel to the list of connected ones.
          * Note that it goes to the "end of the line". */
-        sd->ready_list_node = add_connected_sc_locked(p, sd->subchannel);
+        sd->ready_list_node = add_connected_sc_locked(p, sd);
         /* at this point we know there's at least one suitable subchannel. Go
          * ahead and pick one and notify the pending suitors in
          * p->pending_picks. This preemtively replicates rr_pick()'s actions. */
@@ -433,12 +470,16 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
         }
         while ((pp = p->pending_picks)) {
           p->pending_picks = pp->next;
+
           *pp->target =
               grpc_subchannel_get_connected_subchannel(selected->subchannel);
+          if (pp->user_data != NULL) {
+            *pp->user_data = selected->user_data;
+          }
           if (grpc_lb_round_robin_trace) {
             gpr_log(GPR_DEBUG,
                     "[RR CONN CHANGED] TARGET <-- SUBCHANNEL %p (NODE %p)",
-                    selected->subchannel, selected);
+                    (void *)selected->subchannel, (void *)selected);
           }
           grpc_polling_entity_del_from_pollset_set(exec_ctx, pp->pollent,
                                                    p->base.interested_parties);
@@ -570,20 +611,25 @@ static grpc_lb_policy *round_robin_create(grpc_exec_ctx *exec_ctx,
                                           grpc_lb_policy_args *args) {
   GPR_ASSERT(args->addresses != NULL);
   GPR_ASSERT(args->client_channel_factory != NULL);
+  if (args->num_addresses == 0) return NULL;
 
   round_robin_lb_policy *p = gpr_malloc(sizeof(*p));
   memset(p, 0, sizeof(*p));
 
-  p->subchannels =
-      gpr_malloc(sizeof(*p->subchannels) * args->addresses->naddrs);
-  memset(p->subchannels, 0, sizeof(*p->subchannels) * args->addresses->naddrs);
+  p->num_addresses = args->num_addresses;
+  p->subchannels = gpr_malloc(sizeof(subchannel_data) * p->num_addresses);
+  memset(p->subchannels, 0, sizeof(*p->subchannels) * p->num_addresses);
+  p->user_data_pointers = gpr_malloc(sizeof(void *) * p->num_addresses);
+  memset(p->user_data_pointers, 0, sizeof(void *) * p->num_addresses);
 
   grpc_subchannel_args sc_args;
   size_t subchannel_idx = 0;
-  for (size_t i = 0; i < args->addresses->naddrs; i++) {
+  for (size_t i = 0; i < p->num_addresses; i++) {
     memset(&sc_args, 0, sizeof(grpc_subchannel_args));
-    sc_args.addr = (struct sockaddr *)(args->addresses->addrs[i].addr);
-    sc_args.addr_len = (size_t)args->addresses->addrs[i].len;
+    sc_args.addr = (struct sockaddr *)args->addresses[i].resolved_address->addr;
+    sc_args.addr_len = args->addresses[i].resolved_address->len;
+
+    p->user_data_pointers[i] = args->addresses[i].user_data;
 
     grpc_subchannel *subchannel = grpc_client_channel_factory_create_subchannel(
         exec_ctx, args->client_channel_factory, &sc_args);
@@ -595,12 +641,14 @@ static grpc_lb_policy *round_robin_create(grpc_exec_ctx *exec_ctx,
       sd->policy = p;
       sd->index = subchannel_idx;
       sd->subchannel = subchannel;
+      sd->user_data = p->user_data_pointers[i];
       ++subchannel_idx;
       grpc_closure_init(&sd->connectivity_changed_closure,
                         rr_connectivity_changed, sd);
     }
   }
   if (subchannel_idx == 0) {
+    /* couldn't create any subchannel. Bail out */
     gpr_free(p->subchannels);
     gpr_free(p);
     return NULL;
diff --git a/src/core/ext/resolver/dns/native/dns_resolver.c b/src/core/ext/resolver/dns/native/dns_resolver.c
index 79682e78b5d81ad719a5bb9bd0086e12e3556340..32e9de69a6cf73e283181c2a253853e71c84f754 100644
--- a/src/core/ext/resolver/dns/native/dns_resolver.c
+++ b/src/core/ext/resolver/dns/native/dns_resolver.c
@@ -175,10 +175,18 @@ static void dns_on_resolved(grpc_exec_ctx *exec_ctx, void *arg,
     grpc_lb_policy_args lb_policy_args;
     result = grpc_resolver_result_create();
     memset(&lb_policy_args, 0, sizeof(lb_policy_args));
-    lb_policy_args.addresses = addresses;
+    lb_policy_args.num_addresses = addresses->naddrs;
+    lb_policy_args.addresses =
+        gpr_malloc(sizeof(grpc_lb_address) * lb_policy_args.num_addresses);
+    memset(lb_policy_args.addresses, 0,
+           sizeof(grpc_lb_address) * lb_policy_args.num_addresses);
+    for (size_t i = 0; i < addresses->naddrs; ++i) {
+      lb_policy_args.addresses[i].resolved_address = &r->addresses->addrs[i];
+    }
     lb_policy_args.client_channel_factory = r->client_channel_factory;
     lb_policy =
         grpc_lb_policy_create(exec_ctx, r->lb_policy_name, &lb_policy_args);
+    gpr_free(lb_policy_args.addresses);
     if (lb_policy != NULL) {
       grpc_resolver_result_set_lb_policy(result, lb_policy);
       GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "construction");
diff --git a/src/core/ext/resolver/sockaddr/sockaddr_resolver.c b/src/core/ext/resolver/sockaddr/sockaddr_resolver.c
index 3807522d2bd2eb4c1a3cc390b5bc59d79a20d1a8..425285287cf04268bc016350aa658f2f7a11cce1 100644
--- a/src/core/ext/resolver/sockaddr/sockaddr_resolver.c
+++ b/src/core/ext/resolver/sockaddr/sockaddr_resolver.c
@@ -125,10 +125,18 @@ static void sockaddr_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
     grpc_resolver_result *result = grpc_resolver_result_create();
     grpc_lb_policy_args lb_policy_args;
     memset(&lb_policy_args, 0, sizeof(lb_policy_args));
-    lb_policy_args.addresses = r->addresses;
+    lb_policy_args.num_addresses = r->addresses->naddrs;
+    lb_policy_args.addresses =
+        gpr_malloc(sizeof(grpc_lb_address) * lb_policy_args.num_addresses);
+    memset(lb_policy_args.addresses, 0,
+           sizeof(grpc_lb_address) * lb_policy_args.num_addresses);
+    for (size_t i = 0; i < lb_policy_args.num_addresses; ++i) {
+      lb_policy_args.addresses[i].resolved_address = &r->addresses->addrs[i];
+    }
     lb_policy_args.client_channel_factory = r->client_channel_factory;
     grpc_lb_policy *lb_policy =
         grpc_lb_policy_create(exec_ctx, r->lb_policy_name, &lb_policy_args);
+    gpr_free(lb_policy_args.addresses);
     grpc_resolver_result_set_lb_policy(result, lb_policy);
     GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "sockaddr");
     r->published = 1;
diff --git a/src/core/ext/transport/cronet/transport/cronet_transport.c b/src/core/ext/transport/cronet/transport/cronet_transport.c
index 029c15014edc772aef71188214f2c493714f05c0..366690acf2b0c31b805f802ad3fcc9dc9b0e1116 100644
--- a/src/core/ext/transport/cronet/transport/cronet_transport.c
+++ b/src/core/ext/transport/cronet/transport/cronet_transport.c
@@ -294,7 +294,7 @@ static void remove_from_storage(struct stream_obj *s,
 /*
   Cycle through ops and try to take next action. Break when either
   an action with callback is taken, or no action is possible.
-  This can be executed from the Cronet network thread via cronet callback
+  This can get executed from the Cronet network thread via cronet callback
   or on the application supplied thread via the perform_stream_op function.
 */
 static void execute_from_storage(stream_obj *s) {
@@ -329,6 +329,7 @@ static void execute_from_storage(stream_obj *s) {
 static void on_failed(cronet_bidirectional_stream *stream, int net_error) {
   CRONET_LOG(GPR_DEBUG, "on_failed(%p, %d)", stream, net_error);
   stream_obj *s = (stream_obj *)stream->annotation;
+  gpr_mu_lock(&s->mu);
   cronet_bidirectional_stream_destroy(s->cbs);
   s->state.state_callback_received[OP_FAILED] = true;
   s->cbs = NULL;
@@ -340,6 +341,7 @@ static void on_failed(cronet_bidirectional_stream *stream, int net_error) {
     gpr_free(s->state.ws.write_buffer);
     s->state.ws.write_buffer = NULL;
   }
+  gpr_mu_unlock(&s->mu);
   execute_from_storage(s);
 }
 
@@ -349,6 +351,7 @@ static void on_failed(cronet_bidirectional_stream *stream, int net_error) {
 static void on_canceled(cronet_bidirectional_stream *stream) {
   CRONET_LOG(GPR_DEBUG, "on_canceled(%p)", stream);
   stream_obj *s = (stream_obj *)stream->annotation;
+  gpr_mu_lock(&s->mu);
   cronet_bidirectional_stream_destroy(s->cbs);
   s->state.state_callback_received[OP_CANCELED] = true;
   s->cbs = NULL;
@@ -360,6 +363,7 @@ static void on_canceled(cronet_bidirectional_stream *stream) {
     gpr_free(s->state.ws.write_buffer);
     s->state.ws.write_buffer = NULL;
   }
+  gpr_mu_unlock(&s->mu);
   execute_from_storage(s);
 }
 
@@ -369,9 +373,11 @@ static void on_canceled(cronet_bidirectional_stream *stream) {
 static void on_succeeded(cronet_bidirectional_stream *stream) {
   CRONET_LOG(GPR_DEBUG, "on_succeeded(%p)", stream);
   stream_obj *s = (stream_obj *)stream->annotation;
+  gpr_mu_lock(&s->mu);
   cronet_bidirectional_stream_destroy(s->cbs);
   s->state.state_callback_received[OP_SUCCEEDED] = true;
   s->cbs = NULL;
+  gpr_mu_unlock(&s->mu);
   execute_from_storage(s);
 }
 
@@ -381,6 +387,7 @@ static void on_succeeded(cronet_bidirectional_stream *stream) {
 static void on_request_headers_sent(cronet_bidirectional_stream *stream) {
   CRONET_LOG(GPR_DEBUG, "W: on_request_headers_sent(%p)", stream);
   stream_obj *s = (stream_obj *)stream->annotation;
+  gpr_mu_lock(&s->mu);
   s->state.state_op_done[OP_SEND_INITIAL_METADATA] = true;
   s->state.state_callback_received[OP_SEND_INITIAL_METADATA] = true;
   /* Free the memory allocated for headers */
@@ -388,6 +395,7 @@ static void on_request_headers_sent(cronet_bidirectional_stream *stream) {
     gpr_free(s->header_array.headers);
     s->header_array.headers = NULL;
   }
+  gpr_mu_unlock(&s->mu);
   execute_from_storage(s);
 }
 
@@ -401,6 +409,7 @@ static void on_response_headers_received(
   CRONET_LOG(GPR_DEBUG, "R: on_response_headers_received(%p, %p, %s)", stream,
              headers, negotiated_protocol);
   stream_obj *s = (stream_obj *)stream->annotation;
+  gpr_mu_lock(&s->mu);
   memset(&s->state.rs.initial_metadata, 0,
          sizeof(s->state.rs.initial_metadata));
   grpc_chttp2_incoming_metadata_buffer_init(&s->state.rs.initial_metadata);
@@ -412,6 +421,7 @@ static void on_response_headers_received(
             grpc_mdstr_from_string(headers->headers[i].value)));
   }
   s->state.state_callback_received[OP_RECV_INITIAL_METADATA] = true;
+  gpr_mu_unlock(&s->mu);
   execute_from_storage(s);
 }
 
@@ -422,11 +432,13 @@ static void on_write_completed(cronet_bidirectional_stream *stream,
                                const char *data) {
   stream_obj *s = (stream_obj *)stream->annotation;
   CRONET_LOG(GPR_DEBUG, "W: on_write_completed(%p, %s)", stream, data);
+  gpr_mu_lock(&s->mu);
   if (s->state.ws.write_buffer) {
     gpr_free(s->state.ws.write_buffer);
     s->state.ws.write_buffer = NULL;
   }
   s->state.state_callback_received[OP_SEND_MESSAGE] = true;
+  gpr_mu_unlock(&s->mu);
   execute_from_storage(s);
 }
 
@@ -438,6 +450,7 @@ static void on_read_completed(cronet_bidirectional_stream *stream, char *data,
   stream_obj *s = (stream_obj *)stream->annotation;
   CRONET_LOG(GPR_DEBUG, "R: on_read_completed(%p, %p, %d)", stream, data,
              count);
+  gpr_mu_lock(&s->mu);
   s->state.state_callback_received[OP_RECV_MESSAGE] = true;
   if (count > 0) {
     s->state.rs.received_bytes += count;
@@ -448,11 +461,14 @@ static void on_read_completed(cronet_bidirectional_stream *stream, char *data,
       cronet_bidirectional_stream_read(
           s->cbs, s->state.rs.read_buffer + s->state.rs.received_bytes,
           s->state.rs.remaining_bytes);
+      gpr_mu_unlock(&s->mu);
     } else {
+      gpr_mu_unlock(&s->mu);
       execute_from_storage(s);
     }
   } else {
     s->state.rs.read_stream_closed = true;
+    gpr_mu_unlock(&s->mu);
     execute_from_storage(s);
   }
 }
@@ -466,6 +482,7 @@ static void on_response_trailers_received(
   CRONET_LOG(GPR_DEBUG, "R: on_response_trailers_received(%p,%p)", stream,
              trailers);
   stream_obj *s = (stream_obj *)stream->annotation;
+  gpr_mu_lock(&s->mu);
   memset(&s->state.rs.trailing_metadata, 0,
          sizeof(s->state.rs.trailing_metadata));
   s->state.rs.trailing_metadata_valid = false;
@@ -481,6 +498,7 @@ static void on_response_trailers_received(
     s->state.rs.trailing_metadata_valid = true;
   }
   s->state.state_callback_received[OP_RECV_TRAILING_METADATA] = true;
+  gpr_mu_unlock(&s->mu);
   execute_from_storage(s);
 }
 
@@ -757,14 +775,15 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
              op_can_be_run(stream_op, stream_state, &oas->state,
                            OP_RECV_INITIAL_METADATA)) {
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_INITIAL_METADATA", oas);
-    if (!stream_state->state_op_done[OP_CANCEL_ERROR]) {
+    if (stream_state->state_op_done[OP_CANCEL_ERROR] ||
+        stream_state->state_callback_received[OP_FAILED]) {
+      grpc_exec_ctx_sched(exec_ctx, stream_op->recv_initial_metadata_ready,
+                          GRPC_ERROR_CANCELLED, NULL);
+    } else {
       grpc_chttp2_incoming_metadata_buffer_publish(
           &oas->s->state.rs.initial_metadata, stream_op->recv_initial_metadata);
       grpc_exec_ctx_sched(exec_ctx, stream_op->recv_initial_metadata_ready,
                           GRPC_ERROR_NONE, NULL);
-    } else {
-      grpc_exec_ctx_sched(exec_ctx, stream_op->recv_initial_metadata_ready,
-                          GRPC_ERROR_CANCELLED, NULL);
     }
     stream_state->state_op_done[OP_RECV_INITIAL_METADATA] = true;
     result = ACTION_TAKEN_NO_CALLBACK;
@@ -772,32 +791,40 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
              op_can_be_run(stream_op, stream_state, &oas->state,
                            OP_SEND_MESSAGE)) {
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_SEND_MESSAGE", oas);
-    gpr_slice_buffer write_slice_buffer;
-    gpr_slice slice;
-    gpr_slice_buffer_init(&write_slice_buffer);
-    grpc_byte_stream_next(NULL, stream_op->send_message, &slice,
-                          stream_op->send_message->length, NULL);
-    /* Check that compression flag is OFF. We don't support compression yet. */
-    if (stream_op->send_message->flags != 0) {
-      gpr_log(GPR_ERROR, "Compression is not supported");
-      GPR_ASSERT(stream_op->send_message->flags == 0);
-    }
-    gpr_slice_buffer_add(&write_slice_buffer, slice);
-    if (write_slice_buffer.count != 1) {
-      /* Empty request not handled yet */
-      gpr_log(GPR_ERROR, "Empty request is not supported");
-      GPR_ASSERT(write_slice_buffer.count == 1);
-    }
-    if (write_slice_buffer.count > 0) {
-      size_t write_buffer_size;
-      create_grpc_frame(&write_slice_buffer, &stream_state->ws.write_buffer,
-                        &write_buffer_size);
-      CRONET_LOG(GPR_DEBUG, "cronet_bidirectional_stream_write (%p, %p)",
-                 s->cbs, stream_state->ws.write_buffer);
-      stream_state->state_callback_received[OP_SEND_MESSAGE] = false;
-      cronet_bidirectional_stream_write(s->cbs, stream_state->ws.write_buffer,
-                                        (int)write_buffer_size, false);
-      result = ACTION_TAKEN_WITH_CALLBACK;
+    if (stream_state->state_callback_received[OP_FAILED]) {
+      result = NO_ACTION_POSSIBLE;
+      CRONET_LOG(GPR_DEBUG, "Stream is either cancelled or failed.");
+    } else {
+      gpr_slice_buffer write_slice_buffer;
+      gpr_slice slice;
+      gpr_slice_buffer_init(&write_slice_buffer);
+      grpc_byte_stream_next(NULL, stream_op->send_message, &slice,
+                            stream_op->send_message->length, NULL);
+      /* Check that compression flag is OFF. We don't support compression yet.
+       */
+      if (stream_op->send_message->flags != 0) {
+        gpr_log(GPR_ERROR, "Compression is not supported");
+        GPR_ASSERT(stream_op->send_message->flags == 0);
+      }
+      gpr_slice_buffer_add(&write_slice_buffer, slice);
+      if (write_slice_buffer.count != 1) {
+        /* Empty request not handled yet */
+        gpr_log(GPR_ERROR, "Empty request is not supported");
+        GPR_ASSERT(write_slice_buffer.count == 1);
+      }
+      if (write_slice_buffer.count > 0) {
+        size_t write_buffer_size;
+        create_grpc_frame(&write_slice_buffer, &stream_state->ws.write_buffer,
+                          &write_buffer_size);
+        CRONET_LOG(GPR_DEBUG, "cronet_bidirectional_stream_write (%p, %p)",
+                   s->cbs, stream_state->ws.write_buffer);
+        stream_state->state_callback_received[OP_SEND_MESSAGE] = false;
+        cronet_bidirectional_stream_write(s->cbs, stream_state->ws.write_buffer,
+                                          (int)write_buffer_size, false);
+        result = ACTION_TAKEN_WITH_CALLBACK;
+      } else {
+        result = NO_ACTION_POSSIBLE;
+      }
     }
     stream_state->state_op_done[OP_SEND_MESSAGE] = true;
     oas->state.state_op_done[OP_SEND_MESSAGE] = true;
@@ -805,7 +832,9 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
              op_can_be_run(stream_op, stream_state, &oas->state,
                            OP_RECV_MESSAGE)) {
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_MESSAGE", oas);
-    if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
+    if (stream_state->state_op_done[OP_CANCEL_ERROR] ||
+        stream_state->state_callback_received[OP_FAILED]) {
+      CRONET_LOG(GPR_DEBUG, "Stream is either cancelled or failed.");
       grpc_exec_ctx_sched(exec_ctx, stream_op->recv_message_ready,
                           GRPC_ERROR_CANCELLED, NULL);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
@@ -861,8 +890,10 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
             true; /* Indicates that at least one read request has been made */
         cronet_bidirectional_stream_read(s->cbs, stream_state->rs.read_buffer,
                                          stream_state->rs.remaining_bytes);
+        result = ACTION_TAKEN_WITH_CALLBACK;
+      } else {
+        result = NO_ACTION_POSSIBLE;
       }
-      result = ACTION_TAKEN_WITH_CALLBACK;
     } else if (stream_state->rs.remaining_bytes == 0) {
       CRONET_LOG(GPR_DEBUG, "read operation complete");
       gpr_slice read_data_slice =
@@ -903,11 +934,17 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx *exec_ctx,
              op_can_be_run(stream_op, stream_state, &oas->state,
                            OP_SEND_TRAILING_METADATA)) {
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_SEND_TRAILING_METADATA", oas);
-    CRONET_LOG(GPR_DEBUG, "cronet_bidirectional_stream_write (%p, 0)", s->cbs);
-    stream_state->state_callback_received[OP_SEND_MESSAGE] = false;
-    cronet_bidirectional_stream_write(s->cbs, "", 0, true);
+    if (stream_state->state_callback_received[OP_FAILED]) {
+      result = NO_ACTION_POSSIBLE;
+      CRONET_LOG(GPR_DEBUG, "Stream is either cancelled or failed.");
+    } else {
+      CRONET_LOG(GPR_DEBUG, "cronet_bidirectional_stream_write (%p, 0)",
+                 s->cbs);
+      stream_state->state_callback_received[OP_SEND_MESSAGE] = false;
+      cronet_bidirectional_stream_write(s->cbs, "", 0, true);
+      result = ACTION_TAKEN_WITH_CALLBACK;
+    }
     stream_state->state_op_done[OP_SEND_TRAILING_METADATA] = true;
-    result = ACTION_TAKEN_WITH_CALLBACK;
   } else if (stream_op->cancel_error &&
              op_can_be_run(stream_op, stream_state, &oas->state,
                            OP_CANCEL_ERROR)) {
diff --git a/src/core/lib/channel/handshaker.c b/src/core/lib/channel/handshaker.c
index c0979f5e80679f9b2adefb03d174cdb647ebdb68..8f9fb17a31c76b3b334d34baf539f51e3c4b7c3b 100644
--- a/src/core/lib/channel/handshaker.c
+++ b/src/core/lib/channel/handshaker.c
@@ -33,8 +33,8 @@
 
 #include <string.h>
 
-#include <grpc/impl/codegen/alloc.h>
-#include <grpc/impl/codegen/log.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
 
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/handshaker.h"
diff --git a/src/core/lib/channel/handshaker.h b/src/core/lib/channel/handshaker.h
index b276f6028c1338b40ef347fdb508b5e2b42fb0b0..d574b46242ef27c0dd46c5758cbcc804d4cc532b 100644
--- a/src/core/lib/channel/handshaker.h
+++ b/src/core/lib/channel/handshaker.h
@@ -35,8 +35,6 @@
 #define GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H
 
 #include <grpc/impl/codegen/grpc_types.h>
-#include <grpc/impl/codegen/time.h>
-#include <grpc/support/slice_buffer.h>
 
 #include "src/core/lib/iomgr/closure.h"
 #include "src/core/lib/iomgr/endpoint.h"
diff --git a/src/core/lib/security/credentials/jwt/json_token.c b/src/core/lib/security/credentials/jwt/json_token.c
index 354c13133ef8bffcb91a49f05357a61b72cd5e83..192a5f47edf3fe511bf3d0d471b3508778a0c819 100644
--- a/src/core/lib/security/credentials/jwt/json_token.c
+++ b/src/core/lib/security/credentials/jwt/json_token.c
@@ -38,6 +38,7 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
 
 #include "src/core/lib/security/util/b64.h"
 #include "src/core/lib/security/util/json_util.h"
diff --git a/src/core/lib/support/time_posix.c b/src/core/lib/support/time_posix.c
index 11542072fe63d63a9405c6123cdb01cbfa13bef8..a69c501e9fbaa339fbf13f5fda6e2a90c92b65bc 100644
--- a/src/core/lib/support/time_posix.c
+++ b/src/core/lib/support/time_posix.c
@@ -127,7 +127,7 @@ static gpr_timespec now_impl(gpr_clock_type clock) {
       now.tv_nsec = now_tv.tv_usec * 1000;
       break;
     case GPR_CLOCK_MONOTONIC:
-      now_dbl = (mach_absolute_time() - g_time_start) * g_time_scale;
+      now_dbl = ((double)(mach_absolute_time() - g_time_start)) * g_time_scale;
       now.tv_sec = (int64_t)(now_dbl * 1e-9);
       now.tv_nsec = (int32_t)(now_dbl - ((double)now.tv_sec) * 1e9);
       break;
diff --git a/src/core/lib/transport/metadata.c b/src/core/lib/transport/metadata.c
index 0677f2976603f525addb3dd8ac10eb34a32ad070..4b40c275adbfd625c497e1ab9c90e28280596154 100644
--- a/src/core/lib/transport/metadata.c
+++ b/src/core/lib/transport/metadata.c
@@ -278,7 +278,7 @@ static void ref_md_locked(mdtab_shard *shard,
                           internal_metadata *md DEBUG_ARGS) {
 #ifdef GRPC_METADATA_REFCOUNT_DEBUG
   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
-          "ELM   REF:%p:%d->%d: '%s' = '%s'", md,
+          "ELM   REF:%p:%zu->%zu: '%s' = '%s'", (void *)md,
           gpr_atm_no_barrier_load(&md->refcnt),
           gpr_atm_no_barrier_load(&md->refcnt) + 1,
           grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
@@ -566,7 +566,7 @@ grpc_mdelem *grpc_mdelem_from_metadata_strings(grpc_mdstr *mkey,
   shard->elems[idx] = md;
   gpr_mu_init(&md->mu_user_data);
 #ifdef GRPC_METADATA_REFCOUNT_DEBUG
-  gpr_log(GPR_DEBUG, "ELM   NEW:%p:%d: '%s' = '%s'", md,
+  gpr_log(GPR_DEBUG, "ELM   NEW:%p:%zu: '%s' = '%s'", (void *)md,
           gpr_atm_no_barrier_load(&md->refcnt),
           grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
           grpc_mdstr_as_c_string((grpc_mdstr *)md->value));
@@ -639,7 +639,7 @@ grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd DEBUG_ARGS) {
   if (is_mdelem_static(gmd)) return gmd;
 #ifdef GRPC_METADATA_REFCOUNT_DEBUG
   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
-          "ELM   REF:%p:%d->%d: '%s' = '%s'", md,
+          "ELM   REF:%p:%zu->%zu: '%s' = '%s'", (void *)md,
           gpr_atm_no_barrier_load(&md->refcnt),
           gpr_atm_no_barrier_load(&md->refcnt) + 1,
           grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
@@ -649,7 +649,7 @@ grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd DEBUG_ARGS) {
      this function - meaning that no adjustment to mdtab_free is necessary,
      simplifying the logic here to be just an atomic increment */
   /* use C assert to have this removed in opt builds */
-  assert(gpr_atm_no_barrier_load(&md->refcnt) >= 1);
+  GPR_ASSERT(gpr_atm_no_barrier_load(&md->refcnt) >= 1);
   gpr_atm_no_barrier_fetch_add(&md->refcnt, 1);
   return gmd;
 }
@@ -660,14 +660,16 @@ void grpc_mdelem_unref(grpc_mdelem *gmd DEBUG_ARGS) {
   if (is_mdelem_static(gmd)) return;
 #ifdef GRPC_METADATA_REFCOUNT_DEBUG
   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
-          "ELM UNREF:%p:%d->%d: '%s' = '%s'", md,
+          "ELM UNREF:%p:%zu->%zu: '%s' = '%s'", (void *)md,
           gpr_atm_no_barrier_load(&md->refcnt),
           gpr_atm_no_barrier_load(&md->refcnt) - 1,
           grpc_mdstr_as_c_string((grpc_mdstr *)md->key),
           grpc_mdstr_as_c_string((grpc_mdstr *)md->value));
 #endif
   uint32_t hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash);
-  if (1 == gpr_atm_full_fetch_add(&md->refcnt, -1)) {
+  const gpr_atm prev_refcount = gpr_atm_full_fetch_add(&md->refcnt, -1);
+  GPR_ASSERT(prev_refcount >= 1);
+  if (1 == prev_refcount) {
     /* once the refcount hits zero, some other thread can come along and
        free md at any time: it's unsafe from this point on to access it */
     mdtab_shard *shard =
@@ -676,10 +678,12 @@ void grpc_mdelem_unref(grpc_mdelem *gmd DEBUG_ARGS) {
   }
 }
 
-const char *grpc_mdstr_as_c_string(grpc_mdstr *s) {
+const char *grpc_mdstr_as_c_string(const grpc_mdstr *s) {
   return (const char *)GPR_SLICE_START_PTR(s->slice);
 }
 
+size_t grpc_mdstr_length(const grpc_mdstr *s) { return GRPC_MDSTR_LENGTH(s); }
+
 grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs DEBUG_ARGS) {
   internal_string *s = (internal_string *)gs;
   if (is_mdstr_static(gs)) return gs;
diff --git a/src/core/lib/transport/metadata.h b/src/core/lib/transport/metadata.h
index 2b0921c8d74bc6d10c1623033a1d18d64fdcedb5..71eff0acf261c9e376f149207b258bd962e3a11a 100644
--- a/src/core/lib/transport/metadata.h
+++ b/src/core/lib/transport/metadata.h
@@ -147,7 +147,7 @@ void grpc_mdelem_unref(grpc_mdelem *md);
 
 /* Recover a char* from a grpc_mdstr. The returned string is null terminated.
    Does not promise that the returned string has no embedded nulls however. */
-const char *grpc_mdstr_as_c_string(grpc_mdstr *s);
+const char *grpc_mdstr_as_c_string(const grpc_mdstr *s);
 
 #define GRPC_MDSTR_LENGTH(s) (GPR_SLICE_LENGTH(s->slice))
 
diff --git a/src/cpp/client/client_context.cc b/src/cpp/client/client_context.cc
index 74bb7b0d1c855017f31ddb2251be3d26a6a53a66..5b6aaa777bc64a4de09701def8982a564037f7a8 100644
--- a/src/cpp/client/client_context.cc
+++ b/src/cpp/client/client_context.cc
@@ -36,6 +36,7 @@
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
 #include <grpc++/security/credentials.h>
diff --git a/src/cpp/common/channel_filter.h b/src/cpp/common/channel_filter.h
index ec2af63afd6f4775e125f5d6c16a7f8c74ba7d38..6f5af3dec315ea2dd0819392193145cd295765c3 100644
--- a/src/cpp/common/channel_filter.h
+++ b/src/cpp/common/channel_filter.h
@@ -36,7 +36,7 @@
 
 #include <grpc++/impl/codegen/config.h>
 #include <grpc/grpc.h>
-#include <grpc/impl/codegen/alloc.h>
+#include <grpc/support/alloc.h>
 
 #include <functional>
 #include <vector>
diff --git a/src/cpp/common/core_codegen.cc b/src/cpp/common/core_codegen.cc
index 3d6780bcb8c4f8a573510e31062f480432460e92..ce02202976af5b8ac71666944464bd1017ad4777 100644
--- a/src/cpp/common/core_codegen.cc
+++ b/src/cpp/common/core_codegen.cc
@@ -39,15 +39,19 @@
 #include <grpc/byte_buffer.h>
 #include <grpc/byte_buffer_reader.h>
 #include <grpc/grpc.h>
-#include <grpc/impl/codegen/alloc.h>
-#include <grpc/impl/codegen/byte_buffer.h>
-#include <grpc/impl/codegen/log.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
 #include <grpc/support/slice.h>
 #include <grpc/support/slice_buffer.h>
+#include <grpc/support/sync.h>
 
 #include "src/core/lib/profiling/timers.h"
 
+extern "C" {
+struct grpc_byte_buffer;
+}
+
 namespace grpc {
 
 grpc_completion_queue* CoreCodegen::grpc_completion_queue_create(
@@ -70,6 +74,19 @@ void* CoreCodegen::gpr_malloc(size_t size) { return ::gpr_malloc(size); }
 
 void CoreCodegen::gpr_free(void* p) { return ::gpr_free(p); }
 
+void CoreCodegen::gpr_mu_init(gpr_mu* mu) { ::gpr_mu_init(mu); };
+void CoreCodegen::gpr_mu_destroy(gpr_mu* mu) { ::gpr_mu_destroy(mu); }
+void CoreCodegen::gpr_mu_lock(gpr_mu* mu) { ::gpr_mu_lock(mu); }
+void CoreCodegen::gpr_mu_unlock(gpr_mu* mu) { ::gpr_mu_unlock(mu); }
+void CoreCodegen::gpr_cv_init(gpr_cv* cv) { ::gpr_cv_init(cv); }
+void CoreCodegen::gpr_cv_destroy(gpr_cv* cv) { ::gpr_cv_destroy(cv); }
+int CoreCodegen::gpr_cv_wait(gpr_cv* cv, gpr_mu* mu,
+                             gpr_timespec abs_deadline) {
+  return ::gpr_cv_wait(cv, mu, abs_deadline);
+}
+void CoreCodegen::gpr_cv_signal(gpr_cv* cv) { ::gpr_cv_signal(cv); }
+void CoreCodegen::gpr_cv_broadcast(gpr_cv* cv) { ::gpr_cv_broadcast(cv); }
+
 void CoreCodegen::grpc_byte_buffer_destroy(grpc_byte_buffer* bb) {
   ::grpc_byte_buffer_destroy(bb);
 }
@@ -128,6 +145,10 @@ gpr_timespec CoreCodegen::gpr_inf_future(gpr_clock_type type) {
   return ::gpr_inf_future(type);
 }
 
+gpr_timespec CoreCodegen::gpr_time_0(gpr_clock_type type) {
+  return ::gpr_time_0(type);
+}
+
 void CoreCodegen::assert_fail(const char* failed_assertion) {
   gpr_log(GPR_ERROR, "assertion failed: %s", failed_assertion);
   abort();
diff --git a/src/csharp/Grpc.Tools.nuspec b/src/csharp/Grpc.Tools.nuspec
index 31d1bed647718cdfefafd8462969670c627f5dde..0c937ab9cbf4829554011a6b0c9fa6fdeb833eea 100644
--- a/src/csharp/Grpc.Tools.nuspec
+++ b/src/csharp/Grpc.Tools.nuspec
@@ -16,17 +16,18 @@
     <tags>gRPC RPC Protocol HTTP/2</tags>
   </metadata>
   <files>
-    <file src="protoc_plugins\windows_x86\protoc.exe" target="tools\windows_x86\protoc.exe" />
-    <file src="protoc_plugins\windows_x86\grpc_csharp_plugin.exe" target="tools\windows_x86\grpc_csharp_plugin.exe" />
-    <file src="protoc_plugins\windows_x64\protoc.exe" target="tools\windows_x64\protoc.exe" />
-    <file src="protoc_plugins\windows_x64\grpc_csharp_plugin.exe" target="tools\windows_x64\grpc_csharp_plugin.exe" />
-    <file src="protoc_plugins\linux_x86\protoc" target="tools\linux_x86\protoc" />
-    <file src="protoc_plugins\linux_x86\grpc_csharp_plugin" target="tools\linux_x86\grpc_csharp_plugin" />
-    <file src="protoc_plugins\linux_x64\protoc" target="tools\linux_x64\protoc" />
-    <file src="protoc_plugins\linux_x64\grpc_csharp_plugin" target="tools\linux_x64\grpc_csharp_plugin" />
-    <file src="protoc_plugins\macosx_x86\protoc" target="tools\macosx_x86\protoc" />
-    <file src="protoc_plugins\macosx_x86\grpc_csharp_plugin" target="tools\macosx_x86\grpc_csharp_plugin" />
-    <file src="protoc_plugins\macosx_x64\protoc" target="tools\macosx_x64\protoc" />
-    <file src="protoc_plugins\macosx_x64\grpc_csharp_plugin" target="tools\macosx_x64\grpc_csharp_plugin" />
+    <!-- forward slashes in src path enable building on Linux -->
+    <file src="protoc_plugins/windows_x86/protoc.exe" target="tools\windows_x86\protoc.exe" />
+    <file src="protoc_plugins/windows_x86/grpc_csharp_plugin.exe" target="tools\windows_x86\grpc_csharp_plugin.exe" />
+    <file src="protoc_plugins/windows_x64/protoc.exe" target="tools\windows_x64\protoc.exe" />
+    <file src="protoc_plugins/windows_x64/grpc_csharp_plugin.exe" target="tools\windows_x64\grpc_csharp_plugin.exe" />
+    <file src="protoc_plugins/linux_x86/protoc" target="tools\linux_x86\protoc" />
+    <file src="protoc_plugins/linux_x86/grpc_csharp_plugin" target="tools\linux_x86\grpc_csharp_plugin" />
+    <file src="protoc_plugins/linux_x64/protoc" target="tools\linux_x64\protoc" />
+    <file src="protoc_plugins/linux_x64/grpc_csharp_plugin" target="tools\linux_x64\grpc_csharp_plugin" />
+    <file src="protoc_plugins/macosx_x86/protoc" target="tools\macosx_x86\protoc" />
+    <file src="protoc_plugins/macosx_x86/grpc_csharp_plugin" target="tools\macosx_x86\grpc_csharp_plugin" />
+    <file src="protoc_plugins/macosx_x64/protoc" target="tools\macosx_x64\protoc" />
+    <file src="protoc_plugins/macosx_x64/grpc_csharp_plugin" target="tools\macosx_x64\grpc_csharp_plugin" />
   </files>
 </package>
diff --git a/src/csharp/build_packages.bat b/src/csharp/build_packages.bat
index b92189c840e94ee195de5842c1ea553e4a298800..c0036df13f4f59b428c753d7ea967fe5101abb5d 100644
--- a/src/csharp/build_packages.bat
+++ b/src/csharp/build_packages.bat
@@ -29,6 +29,10 @@
 
 @rem Builds gRPC NuGet packages
 
+@rem This way of building nuget packages is now obsolete. C# nuget packages
+@rem with CoreCLR support are now being built using the dotnet cli
+@rem in build_packages_dotnetcli.sh
+
 @rem Current package versions
 set VERSION=1.1.0-dev
 set PROTOBUF_VERSION=3.0.0
@@ -77,8 +81,8 @@ endlocal
 xcopy /Y /I *.nupkg ..\..\artifacts\
 
 @rem create a zipfile with the artifacts as well
-powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::CreateFromDirectory('..\..\artifacts', 'csharp_nugets.zip');"
-xcopy /Y /I csharp_nugets.zip ..\..\artifacts\
+powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::CreateFromDirectory('..\..\artifacts', 'csharp_nugets_obsolete.zip');"
+xcopy /Y /I csharp_nugets_obsolete.zip ..\..\artifacts\
 
 goto :EOF
 
diff --git a/src/csharp/build_packages_dotnetcli.sh b/src/csharp/build_packages_dotnetcli.sh
index 2807278de6d7bc3f6d879f6b5707208b7c33527b..3c127f320bb303b15d0a9dcca8d45aa4a08c527b 100755
--- a/src/csharp/build_packages_dotnetcli.sh
+++ b/src/csharp/build_packages_dotnetcli.sh
@@ -34,9 +34,6 @@ cd $(dirname $0)
 
 mkdir -p ../../artifacts/
 
-# IMPORTANT: NuGet packages generated by dotnet CLI are considered experimental.
-# The official nugets are generated by src/csharp/build_packages.bat
-
 mkdir -p nativelibs/windows_x86 nativelibs/windows_x64 \
     nativelibs/linux_x86 nativelibs/linux_x64 \
     nativelibs/macosx_x86 nativelibs/macosx_x64
diff --git a/src/proto/grpc/lb/v1/load_balancer.options b/src/proto/grpc/lb/v1/load_balancer.options
index d90366996e7bdf7e408f99bf01ee6b7714128e46..a9398d5f474fd099f35938b8ff19ea90c595950d 100644
--- a/src/proto/grpc/lb/v1/load_balancer.options
+++ b/src/proto/grpc/lb/v1/load_balancer.options
@@ -1,6 +1,6 @@
 grpc.lb.v1.InitialLoadBalanceRequest.name max_size:128
 grpc.lb.v1.InitialLoadBalanceResponse.client_config max_size:64
 grpc.lb.v1.InitialLoadBalanceResponse.load_balancer_delegate max_size:64
-grpc.lb.v1.Server.ip_address max_size:46
-grpc.lb.v1.Server.load_balance_token max_size:64
+grpc.lb.v1.Server.ip_address max_size:16
+grpc.lb.v1.Server.load_balance_token max_size:65
 load_balancer.proto no_unions:true
diff --git a/src/proto/grpc/lb/v1/load_balancer.proto b/src/proto/grpc/lb/v1/load_balancer.proto
index 1bcad0b1d4b3f6cdb315c8d99f5a4ec3f5ea341e..b4a33f33389676e43bc8531593f594f64abf80b8 100644
--- a/src/proto/grpc/lb/v1/load_balancer.proto
+++ b/src/proto/grpc/lb/v1/load_balancer.proto
@@ -32,7 +32,6 @@ syntax = "proto3";
 package grpc.lb.v1;
 
 message Duration {
-
   // Signed seconds of the span of time. Must be from -315,576,000,000
   // to +315,576,000,000 inclusive.
   int64 seconds = 1;
@@ -93,16 +92,11 @@ message LoadBalanceResponse {
 }
 
 message InitialLoadBalanceResponse {
-  oneof initial_response_type {
-    // TODO(zhangkun83): ClientConfig not yet defined
-    //ClientConfig client_config = 1;
-
-    // This is an application layer redirect that indicates the client should
-    // use the specified server for load balancing. When this field is set in
-    // the response, the client should open a separate connection to the
-    // load_balancer_delegate and call the BalanceLoad method.
-    string load_balancer_delegate = 2;
-  }
+  // This is an application layer redirect that indicates the client should use
+  // the specified server for load balancing. When this field is non-empty in
+  // the response, the client should open a separate connection to the
+  // load_balancer_delegate and call the BalanceLoad method.
+  string load_balancer_delegate = 1;
 
   // This interval defines how often the client should send the client stats
   // to the load balancer. Stats should only be reported when the duration is
@@ -125,14 +119,17 @@ message ServerList {
 }
 
 message Server {
-  // A resolved address and port for the server. The IP address string may
+  // A resolved address for the server, serialized in network-byte-order. It may
   // either be an IPv4 or IPv6 address.
-  string ip_address = 1;
+  bytes ip_address = 1;
+
+  // A resolved port number for the server.
   int32 port = 2;
 
-  // An opaque token that is passed from the client to the server in metadata.
-  // The server may expect this token to indicate that the request from the
-  // client was load balanced.
+  // An opaque but printable token given to the frontend for each pick. All
+  // frontend requests for that pick must include the token in its initial
+  // metadata. The token is used by the backend to verify the request and to
+  // allow the backend to report load to the gRPC LB system.
   string load_balance_token = 3;
 
   // Indicates whether this particular request should be dropped by the client
diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index d36ac2330508b38989eeaad449213e3abc6a437e..ea3b6f3391debaa6d27e28f58c3db6a9734f52ce 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -53,6 +53,7 @@ PYTHON_STEM = os.path.dirname(os.path.abspath(__file__))
 GRPC_STEM = os.path.abspath(PYTHON_STEM + '../../../../')
 PROTO_STEM = os.path.join(GRPC_STEM, 'src', 'proto')
 PROTO_GEN_STEM = os.path.join(GRPC_STEM, 'src', 'python', 'gens')
+CYTHON_STEM = os.path.join(PYTHON_STEM, 'grpc', '_cython')
 
 CONF_PY_ADDENDUM = """
 extensions.append('sphinx.ext.napoleon')
@@ -244,7 +245,7 @@ def try_cythonize(extensions, linetracing=False, mandatory=True):
     extensions,
     include_path=[
       include_dir for extension in extensions for include_dir in extension.include_dirs
-    ],
+    ] + [CYTHON_STEM],
     compiler_directives=cython_compiler_directives
   )
 
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/security.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/security.pyx.pxi
index 23cee7bd6e2c4512b8a80cc35b3432fd3170bb90..20fc1c5fce78560ee055a8eef7cadcb481304279 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/security.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/security.pyx.pxi
@@ -35,7 +35,7 @@ import pkg_resources
 cdef grpc_ssl_roots_override_result ssl_roots_override_callback(
     char **pem_root_certs) with gil:
   temporary_pem_root_certs = pkg_resources.resource_string(
-      'grpc._cython', '_credentials/roots.pem')
+      __name__.rstrip('.cygrpc'), '_credentials/roots.pem')
   pem_root_certs[0] = <char *>gpr_malloc(len(temporary_pem_root_certs) + 1)
   memcpy(
       pem_root_certs[0], <char *>temporary_pem_root_certs,
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pxd b/src/python/grpcio/grpc/_cython/cygrpc.pxd
index 9779534e38470454168d76f424279240df83d766..26454634a1eb5cbbf1608233be3bb34b86e26ccf 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pxd
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pxd
@@ -27,12 +27,12 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-include "grpc/_cython/_cygrpc/grpc.pxi"
+include "_cygrpc/grpc.pxi"
 
-include "grpc/_cython/_cygrpc/call.pxd.pxi"
-include "grpc/_cython/_cygrpc/channel.pxd.pxi"
-include "grpc/_cython/_cygrpc/credentials.pxd.pxi"
-include "grpc/_cython/_cygrpc/completion_queue.pxd.pxi"
-include "grpc/_cython/_cygrpc/records.pxd.pxi"
-include "grpc/_cython/_cygrpc/security.pxd.pxi"
-include "grpc/_cython/_cygrpc/server.pxd.pxi"
+include "_cygrpc/call.pxd.pxi"
+include "_cygrpc/channel.pxd.pxi"
+include "_cygrpc/credentials.pxd.pxi"
+include "_cygrpc/completion_queue.pxd.pxi"
+include "_cygrpc/records.pxd.pxi"
+include "_cygrpc/security.pxd.pxi"
+include "_cygrpc/server.pxd.pxi"
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index 08089994a951913772752c5a7f3987b71f0ba275..e1bd046a1a5e72035b5c5efc05defc583bfd6bf1 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -35,14 +35,14 @@ import sys
 
 # TODO(atash): figure out why the coverage tool gets confused about the Cython
 # coverage plugin when the following files don't have a '.pxi' suffix.
-include "grpc/_cython/_cygrpc/grpc_string.pyx.pxi"
-include "grpc/_cython/_cygrpc/call.pyx.pxi"
-include "grpc/_cython/_cygrpc/channel.pyx.pxi"
-include "grpc/_cython/_cygrpc/credentials.pyx.pxi"
-include "grpc/_cython/_cygrpc/completion_queue.pyx.pxi"
-include "grpc/_cython/_cygrpc/records.pyx.pxi"
-include "grpc/_cython/_cygrpc/security.pyx.pxi"
-include "grpc/_cython/_cygrpc/server.pyx.pxi"
+include "_cygrpc/grpc_string.pyx.pxi"
+include "_cygrpc/call.pyx.pxi"
+include "_cygrpc/channel.pyx.pxi"
+include "_cygrpc/credentials.pyx.pxi"
+include "_cygrpc/completion_queue.pyx.pxi"
+include "_cygrpc/records.pyx.pxi"
+include "_cygrpc/security.pyx.pxi"
+include "_cygrpc/server.pyx.pxi"
 
 #
 # initialize gRPC
diff --git a/src/ruby/ext/grpc/rb_compression_options.c b/src/ruby/ext/grpc/rb_compression_options.c
index 0a3a215b1ca9d7d5a8e35f799d25475ead00b2c3..c5668fdab4fa6fa214c6a10deeade0ba3bf363c0 100644
--- a/src/ruby/ext/grpc/rb_compression_options.c
+++ b/src/ruby/ext/grpc/rb_compression_options.c
@@ -38,7 +38,7 @@
 
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
-#include <grpc/impl/codegen/alloc.h>
+#include <grpc/support/alloc.h>
 #include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/grpc_types.h>
 #include <string.h>
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index 9caaf7b78351d2d9307cdb837a0b3418be3c00b7..a6cad0db1ac4f518487469b34af37903fc6e658e 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -37,6 +37,16 @@
 
 #include "rb_grpc_imports.generated.h"
 
+grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
+grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
+grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
+grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
+grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
+grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
+grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
+grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
+grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
+grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
 census_initialize_type census_initialize_import;
 census_shutdown_type census_shutdown_import;
 census_supported_type census_supported_import;
@@ -164,21 +174,48 @@ gpr_malloc_aligned_type gpr_malloc_aligned_import;
 gpr_free_aligned_type gpr_free_aligned_import;
 gpr_set_allocation_functions_type gpr_set_allocation_functions_import;
 gpr_get_allocation_functions_type gpr_get_allocation_functions_import;
-grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
-grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
-grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
-grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
-grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
-grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
-grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
-grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
-grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
-grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
+gpr_avl_create_type gpr_avl_create_import;
+gpr_avl_ref_type gpr_avl_ref_import;
+gpr_avl_unref_type gpr_avl_unref_import;
+gpr_avl_add_type gpr_avl_add_import;
+gpr_avl_remove_type gpr_avl_remove_import;
+gpr_avl_get_type gpr_avl_get_import;
+gpr_avl_maybe_get_type gpr_avl_maybe_get_import;
+gpr_avl_is_empty_type gpr_avl_is_empty_import;
+gpr_cmdline_create_type gpr_cmdline_create_import;
+gpr_cmdline_add_int_type gpr_cmdline_add_int_import;
+gpr_cmdline_add_flag_type gpr_cmdline_add_flag_import;
+gpr_cmdline_add_string_type gpr_cmdline_add_string_import;
+gpr_cmdline_on_extra_arg_type gpr_cmdline_on_extra_arg_import;
+gpr_cmdline_set_survive_failure_type gpr_cmdline_set_survive_failure_import;
+gpr_cmdline_parse_type gpr_cmdline_parse_import;
+gpr_cmdline_destroy_type gpr_cmdline_destroy_import;
+gpr_cmdline_usage_string_type gpr_cmdline_usage_string_import;
+gpr_cpu_num_cores_type gpr_cpu_num_cores_import;
+gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
+gpr_histogram_create_type gpr_histogram_create_import;
+gpr_histogram_destroy_type gpr_histogram_destroy_import;
+gpr_histogram_add_type gpr_histogram_add_import;
+gpr_histogram_merge_type gpr_histogram_merge_import;
+gpr_histogram_percentile_type gpr_histogram_percentile_import;
+gpr_histogram_mean_type gpr_histogram_mean_import;
+gpr_histogram_stddev_type gpr_histogram_stddev_import;
+gpr_histogram_variance_type gpr_histogram_variance_import;
+gpr_histogram_maximum_type gpr_histogram_maximum_import;
+gpr_histogram_minimum_type gpr_histogram_minimum_import;
+gpr_histogram_count_type gpr_histogram_count_import;
+gpr_histogram_sum_type gpr_histogram_sum_import;
+gpr_histogram_sum_of_squares_type gpr_histogram_sum_of_squares_import;
+gpr_histogram_get_contents_type gpr_histogram_get_contents_import;
+gpr_histogram_merge_contents_type gpr_histogram_merge_contents_import;
+gpr_join_host_port_type gpr_join_host_port_import;
+gpr_split_host_port_type gpr_split_host_port_import;
 gpr_log_type gpr_log_import;
 gpr_log_message_type gpr_log_message_import;
 gpr_set_log_verbosity_type gpr_set_log_verbosity_import;
 gpr_log_verbosity_init_type gpr_log_verbosity_init_import;
 gpr_set_log_function_type gpr_set_log_function_import;
+gpr_format_message_type gpr_format_message_import;
 gpr_slice_ref_type gpr_slice_ref_import;
 gpr_slice_unref_type gpr_slice_unref_import;
 gpr_slice_new_type gpr_slice_new_import;
@@ -208,6 +245,13 @@ gpr_slice_buffer_move_into_type gpr_slice_buffer_move_into_import;
 gpr_slice_buffer_trim_end_type gpr_slice_buffer_trim_end_import;
 gpr_slice_buffer_move_first_type gpr_slice_buffer_move_first_import;
 gpr_slice_buffer_take_first_type gpr_slice_buffer_take_first_import;
+gpr_strdup_type gpr_strdup_import;
+gpr_asprintf_type gpr_asprintf_import;
+gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
+gpr_subprocess_create_type gpr_subprocess_create_import;
+gpr_subprocess_destroy_type gpr_subprocess_destroy_import;
+gpr_subprocess_join_type gpr_subprocess_join_import;
+gpr_subprocess_interrupt_type gpr_subprocess_interrupt_import;
 gpr_mu_init_type gpr_mu_init_import;
 gpr_mu_destroy_type gpr_mu_destroy_import;
 gpr_mu_lock_type gpr_mu_lock_import;
@@ -231,6 +275,14 @@ gpr_unref_type gpr_unref_import;
 gpr_stats_init_type gpr_stats_init_import;
 gpr_stats_inc_type gpr_stats_inc_import;
 gpr_stats_read_type gpr_stats_read_import;
+gpr_thd_new_type gpr_thd_new_import;
+gpr_thd_options_default_type gpr_thd_options_default_import;
+gpr_thd_options_set_detached_type gpr_thd_options_set_detached_import;
+gpr_thd_options_set_joinable_type gpr_thd_options_set_joinable_import;
+gpr_thd_options_is_detached_type gpr_thd_options_is_detached_import;
+gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
+gpr_thd_currentid_type gpr_thd_currentid_import;
+gpr_thd_join_type gpr_thd_join_import;
 gpr_time_0_type gpr_time_0_import;
 gpr_inf_future_type gpr_inf_future_import;
 gpr_inf_past_type gpr_inf_past_import;
@@ -252,60 +304,18 @@ gpr_time_to_millis_type gpr_time_to_millis_import;
 gpr_time_similar_type gpr_time_similar_import;
 gpr_sleep_until_type gpr_sleep_until_import;
 gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
-gpr_avl_create_type gpr_avl_create_import;
-gpr_avl_ref_type gpr_avl_ref_import;
-gpr_avl_unref_type gpr_avl_unref_import;
-gpr_avl_add_type gpr_avl_add_import;
-gpr_avl_remove_type gpr_avl_remove_import;
-gpr_avl_get_type gpr_avl_get_import;
-gpr_avl_maybe_get_type gpr_avl_maybe_get_import;
-gpr_avl_is_empty_type gpr_avl_is_empty_import;
-gpr_cmdline_create_type gpr_cmdline_create_import;
-gpr_cmdline_add_int_type gpr_cmdline_add_int_import;
-gpr_cmdline_add_flag_type gpr_cmdline_add_flag_import;
-gpr_cmdline_add_string_type gpr_cmdline_add_string_import;
-gpr_cmdline_on_extra_arg_type gpr_cmdline_on_extra_arg_import;
-gpr_cmdline_set_survive_failure_type gpr_cmdline_set_survive_failure_import;
-gpr_cmdline_parse_type gpr_cmdline_parse_import;
-gpr_cmdline_destroy_type gpr_cmdline_destroy_import;
-gpr_cmdline_usage_string_type gpr_cmdline_usage_string_import;
-gpr_cpu_num_cores_type gpr_cpu_num_cores_import;
-gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
-gpr_histogram_create_type gpr_histogram_create_import;
-gpr_histogram_destroy_type gpr_histogram_destroy_import;
-gpr_histogram_add_type gpr_histogram_add_import;
-gpr_histogram_merge_type gpr_histogram_merge_import;
-gpr_histogram_percentile_type gpr_histogram_percentile_import;
-gpr_histogram_mean_type gpr_histogram_mean_import;
-gpr_histogram_stddev_type gpr_histogram_stddev_import;
-gpr_histogram_variance_type gpr_histogram_variance_import;
-gpr_histogram_maximum_type gpr_histogram_maximum_import;
-gpr_histogram_minimum_type gpr_histogram_minimum_import;
-gpr_histogram_count_type gpr_histogram_count_import;
-gpr_histogram_sum_type gpr_histogram_sum_import;
-gpr_histogram_sum_of_squares_type gpr_histogram_sum_of_squares_import;
-gpr_histogram_get_contents_type gpr_histogram_get_contents_import;
-gpr_histogram_merge_contents_type gpr_histogram_merge_contents_import;
-gpr_join_host_port_type gpr_join_host_port_import;
-gpr_split_host_port_type gpr_split_host_port_import;
-gpr_format_message_type gpr_format_message_import;
-gpr_strdup_type gpr_strdup_import;
-gpr_asprintf_type gpr_asprintf_import;
-gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
-gpr_subprocess_create_type gpr_subprocess_create_import;
-gpr_subprocess_destroy_type gpr_subprocess_destroy_import;
-gpr_subprocess_join_type gpr_subprocess_join_import;
-gpr_subprocess_interrupt_type gpr_subprocess_interrupt_import;
-gpr_thd_new_type gpr_thd_new_import;
-gpr_thd_options_default_type gpr_thd_options_default_import;
-gpr_thd_options_set_detached_type gpr_thd_options_set_detached_import;
-gpr_thd_options_set_joinable_type gpr_thd_options_set_joinable_import;
-gpr_thd_options_is_detached_type gpr_thd_options_is_detached_import;
-gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
-gpr_thd_currentid_type gpr_thd_currentid_import;
-gpr_thd_join_type gpr_thd_join_import;
 
 void grpc_rb_load_imports(HMODULE library) {
+  grpc_raw_byte_buffer_create_import = (grpc_raw_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_byte_buffer_create");
+  grpc_raw_compressed_byte_buffer_create_import = (grpc_raw_compressed_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_compressed_byte_buffer_create");
+  grpc_byte_buffer_copy_import = (grpc_byte_buffer_copy_type) GetProcAddress(library, "grpc_byte_buffer_copy");
+  grpc_byte_buffer_length_import = (grpc_byte_buffer_length_type) GetProcAddress(library, "grpc_byte_buffer_length");
+  grpc_byte_buffer_destroy_import = (grpc_byte_buffer_destroy_type) GetProcAddress(library, "grpc_byte_buffer_destroy");
+  grpc_byte_buffer_reader_init_import = (grpc_byte_buffer_reader_init_type) GetProcAddress(library, "grpc_byte_buffer_reader_init");
+  grpc_byte_buffer_reader_destroy_import = (grpc_byte_buffer_reader_destroy_type) GetProcAddress(library, "grpc_byte_buffer_reader_destroy");
+  grpc_byte_buffer_reader_next_import = (grpc_byte_buffer_reader_next_type) GetProcAddress(library, "grpc_byte_buffer_reader_next");
+  grpc_byte_buffer_reader_readall_import = (grpc_byte_buffer_reader_readall_type) GetProcAddress(library, "grpc_byte_buffer_reader_readall");
+  grpc_raw_byte_buffer_from_reader_import = (grpc_raw_byte_buffer_from_reader_type) GetProcAddress(library, "grpc_raw_byte_buffer_from_reader");
   census_initialize_import = (census_initialize_type) GetProcAddress(library, "census_initialize");
   census_shutdown_import = (census_shutdown_type) GetProcAddress(library, "census_shutdown");
   census_supported_import = (census_supported_type) GetProcAddress(library, "census_supported");
@@ -433,21 +443,48 @@ void grpc_rb_load_imports(HMODULE library) {
   gpr_free_aligned_import = (gpr_free_aligned_type) GetProcAddress(library, "gpr_free_aligned");
   gpr_set_allocation_functions_import = (gpr_set_allocation_functions_type) GetProcAddress(library, "gpr_set_allocation_functions");
   gpr_get_allocation_functions_import = (gpr_get_allocation_functions_type) GetProcAddress(library, "gpr_get_allocation_functions");
-  grpc_raw_byte_buffer_create_import = (grpc_raw_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_byte_buffer_create");
-  grpc_raw_compressed_byte_buffer_create_import = (grpc_raw_compressed_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_compressed_byte_buffer_create");
-  grpc_byte_buffer_copy_import = (grpc_byte_buffer_copy_type) GetProcAddress(library, "grpc_byte_buffer_copy");
-  grpc_byte_buffer_length_import = (grpc_byte_buffer_length_type) GetProcAddress(library, "grpc_byte_buffer_length");
-  grpc_byte_buffer_destroy_import = (grpc_byte_buffer_destroy_type) GetProcAddress(library, "grpc_byte_buffer_destroy");
-  grpc_byte_buffer_reader_init_import = (grpc_byte_buffer_reader_init_type) GetProcAddress(library, "grpc_byte_buffer_reader_init");
-  grpc_byte_buffer_reader_destroy_import = (grpc_byte_buffer_reader_destroy_type) GetProcAddress(library, "grpc_byte_buffer_reader_destroy");
-  grpc_byte_buffer_reader_next_import = (grpc_byte_buffer_reader_next_type) GetProcAddress(library, "grpc_byte_buffer_reader_next");
-  grpc_byte_buffer_reader_readall_import = (grpc_byte_buffer_reader_readall_type) GetProcAddress(library, "grpc_byte_buffer_reader_readall");
-  grpc_raw_byte_buffer_from_reader_import = (grpc_raw_byte_buffer_from_reader_type) GetProcAddress(library, "grpc_raw_byte_buffer_from_reader");
+  gpr_avl_create_import = (gpr_avl_create_type) GetProcAddress(library, "gpr_avl_create");
+  gpr_avl_ref_import = (gpr_avl_ref_type) GetProcAddress(library, "gpr_avl_ref");
+  gpr_avl_unref_import = (gpr_avl_unref_type) GetProcAddress(library, "gpr_avl_unref");
+  gpr_avl_add_import = (gpr_avl_add_type) GetProcAddress(library, "gpr_avl_add");
+  gpr_avl_remove_import = (gpr_avl_remove_type) GetProcAddress(library, "gpr_avl_remove");
+  gpr_avl_get_import = (gpr_avl_get_type) GetProcAddress(library, "gpr_avl_get");
+  gpr_avl_maybe_get_import = (gpr_avl_maybe_get_type) GetProcAddress(library, "gpr_avl_maybe_get");
+  gpr_avl_is_empty_import = (gpr_avl_is_empty_type) GetProcAddress(library, "gpr_avl_is_empty");
+  gpr_cmdline_create_import = (gpr_cmdline_create_type) GetProcAddress(library, "gpr_cmdline_create");
+  gpr_cmdline_add_int_import = (gpr_cmdline_add_int_type) GetProcAddress(library, "gpr_cmdline_add_int");
+  gpr_cmdline_add_flag_import = (gpr_cmdline_add_flag_type) GetProcAddress(library, "gpr_cmdline_add_flag");
+  gpr_cmdline_add_string_import = (gpr_cmdline_add_string_type) GetProcAddress(library, "gpr_cmdline_add_string");
+  gpr_cmdline_on_extra_arg_import = (gpr_cmdline_on_extra_arg_type) GetProcAddress(library, "gpr_cmdline_on_extra_arg");
+  gpr_cmdline_set_survive_failure_import = (gpr_cmdline_set_survive_failure_type) GetProcAddress(library, "gpr_cmdline_set_survive_failure");
+  gpr_cmdline_parse_import = (gpr_cmdline_parse_type) GetProcAddress(library, "gpr_cmdline_parse");
+  gpr_cmdline_destroy_import = (gpr_cmdline_destroy_type) GetProcAddress(library, "gpr_cmdline_destroy");
+  gpr_cmdline_usage_string_import = (gpr_cmdline_usage_string_type) GetProcAddress(library, "gpr_cmdline_usage_string");
+  gpr_cpu_num_cores_import = (gpr_cpu_num_cores_type) GetProcAddress(library, "gpr_cpu_num_cores");
+  gpr_cpu_current_cpu_import = (gpr_cpu_current_cpu_type) GetProcAddress(library, "gpr_cpu_current_cpu");
+  gpr_histogram_create_import = (gpr_histogram_create_type) GetProcAddress(library, "gpr_histogram_create");
+  gpr_histogram_destroy_import = (gpr_histogram_destroy_type) GetProcAddress(library, "gpr_histogram_destroy");
+  gpr_histogram_add_import = (gpr_histogram_add_type) GetProcAddress(library, "gpr_histogram_add");
+  gpr_histogram_merge_import = (gpr_histogram_merge_type) GetProcAddress(library, "gpr_histogram_merge");
+  gpr_histogram_percentile_import = (gpr_histogram_percentile_type) GetProcAddress(library, "gpr_histogram_percentile");
+  gpr_histogram_mean_import = (gpr_histogram_mean_type) GetProcAddress(library, "gpr_histogram_mean");
+  gpr_histogram_stddev_import = (gpr_histogram_stddev_type) GetProcAddress(library, "gpr_histogram_stddev");
+  gpr_histogram_variance_import = (gpr_histogram_variance_type) GetProcAddress(library, "gpr_histogram_variance");
+  gpr_histogram_maximum_import = (gpr_histogram_maximum_type) GetProcAddress(library, "gpr_histogram_maximum");
+  gpr_histogram_minimum_import = (gpr_histogram_minimum_type) GetProcAddress(library, "gpr_histogram_minimum");
+  gpr_histogram_count_import = (gpr_histogram_count_type) GetProcAddress(library, "gpr_histogram_count");
+  gpr_histogram_sum_import = (gpr_histogram_sum_type) GetProcAddress(library, "gpr_histogram_sum");
+  gpr_histogram_sum_of_squares_import = (gpr_histogram_sum_of_squares_type) GetProcAddress(library, "gpr_histogram_sum_of_squares");
+  gpr_histogram_get_contents_import = (gpr_histogram_get_contents_type) GetProcAddress(library, "gpr_histogram_get_contents");
+  gpr_histogram_merge_contents_import = (gpr_histogram_merge_contents_type) GetProcAddress(library, "gpr_histogram_merge_contents");
+  gpr_join_host_port_import = (gpr_join_host_port_type) GetProcAddress(library, "gpr_join_host_port");
+  gpr_split_host_port_import = (gpr_split_host_port_type) GetProcAddress(library, "gpr_split_host_port");
   gpr_log_import = (gpr_log_type) GetProcAddress(library, "gpr_log");
   gpr_log_message_import = (gpr_log_message_type) GetProcAddress(library, "gpr_log_message");
   gpr_set_log_verbosity_import = (gpr_set_log_verbosity_type) GetProcAddress(library, "gpr_set_log_verbosity");
   gpr_log_verbosity_init_import = (gpr_log_verbosity_init_type) GetProcAddress(library, "gpr_log_verbosity_init");
   gpr_set_log_function_import = (gpr_set_log_function_type) GetProcAddress(library, "gpr_set_log_function");
+  gpr_format_message_import = (gpr_format_message_type) GetProcAddress(library, "gpr_format_message");
   gpr_slice_ref_import = (gpr_slice_ref_type) GetProcAddress(library, "gpr_slice_ref");
   gpr_slice_unref_import = (gpr_slice_unref_type) GetProcAddress(library, "gpr_slice_unref");
   gpr_slice_new_import = (gpr_slice_new_type) GetProcAddress(library, "gpr_slice_new");
@@ -477,6 +514,13 @@ void grpc_rb_load_imports(HMODULE library) {
   gpr_slice_buffer_trim_end_import = (gpr_slice_buffer_trim_end_type) GetProcAddress(library, "gpr_slice_buffer_trim_end");
   gpr_slice_buffer_move_first_import = (gpr_slice_buffer_move_first_type) GetProcAddress(library, "gpr_slice_buffer_move_first");
   gpr_slice_buffer_take_first_import = (gpr_slice_buffer_take_first_type) GetProcAddress(library, "gpr_slice_buffer_take_first");
+  gpr_strdup_import = (gpr_strdup_type) GetProcAddress(library, "gpr_strdup");
+  gpr_asprintf_import = (gpr_asprintf_type) GetProcAddress(library, "gpr_asprintf");
+  gpr_subprocess_binary_extension_import = (gpr_subprocess_binary_extension_type) GetProcAddress(library, "gpr_subprocess_binary_extension");
+  gpr_subprocess_create_import = (gpr_subprocess_create_type) GetProcAddress(library, "gpr_subprocess_create");
+  gpr_subprocess_destroy_import = (gpr_subprocess_destroy_type) GetProcAddress(library, "gpr_subprocess_destroy");
+  gpr_subprocess_join_import = (gpr_subprocess_join_type) GetProcAddress(library, "gpr_subprocess_join");
+  gpr_subprocess_interrupt_import = (gpr_subprocess_interrupt_type) GetProcAddress(library, "gpr_subprocess_interrupt");
   gpr_mu_init_import = (gpr_mu_init_type) GetProcAddress(library, "gpr_mu_init");
   gpr_mu_destroy_import = (gpr_mu_destroy_type) GetProcAddress(library, "gpr_mu_destroy");
   gpr_mu_lock_import = (gpr_mu_lock_type) GetProcAddress(library, "gpr_mu_lock");
@@ -500,6 +544,14 @@ void grpc_rb_load_imports(HMODULE library) {
   gpr_stats_init_import = (gpr_stats_init_type) GetProcAddress(library, "gpr_stats_init");
   gpr_stats_inc_import = (gpr_stats_inc_type) GetProcAddress(library, "gpr_stats_inc");
   gpr_stats_read_import = (gpr_stats_read_type) GetProcAddress(library, "gpr_stats_read");
+  gpr_thd_new_import = (gpr_thd_new_type) GetProcAddress(library, "gpr_thd_new");
+  gpr_thd_options_default_import = (gpr_thd_options_default_type) GetProcAddress(library, "gpr_thd_options_default");
+  gpr_thd_options_set_detached_import = (gpr_thd_options_set_detached_type) GetProcAddress(library, "gpr_thd_options_set_detached");
+  gpr_thd_options_set_joinable_import = (gpr_thd_options_set_joinable_type) GetProcAddress(library, "gpr_thd_options_set_joinable");
+  gpr_thd_options_is_detached_import = (gpr_thd_options_is_detached_type) GetProcAddress(library, "gpr_thd_options_is_detached");
+  gpr_thd_options_is_joinable_import = (gpr_thd_options_is_joinable_type) GetProcAddress(library, "gpr_thd_options_is_joinable");
+  gpr_thd_currentid_import = (gpr_thd_currentid_type) GetProcAddress(library, "gpr_thd_currentid");
+  gpr_thd_join_import = (gpr_thd_join_type) GetProcAddress(library, "gpr_thd_join");
   gpr_time_0_import = (gpr_time_0_type) GetProcAddress(library, "gpr_time_0");
   gpr_inf_future_import = (gpr_inf_future_type) GetProcAddress(library, "gpr_inf_future");
   gpr_inf_past_import = (gpr_inf_past_type) GetProcAddress(library, "gpr_inf_past");
@@ -521,58 +573,6 @@ void grpc_rb_load_imports(HMODULE library) {
   gpr_time_similar_import = (gpr_time_similar_type) GetProcAddress(library, "gpr_time_similar");
   gpr_sleep_until_import = (gpr_sleep_until_type) GetProcAddress(library, "gpr_sleep_until");
   gpr_timespec_to_micros_import = (gpr_timespec_to_micros_type) GetProcAddress(library, "gpr_timespec_to_micros");
-  gpr_avl_create_import = (gpr_avl_create_type) GetProcAddress(library, "gpr_avl_create");
-  gpr_avl_ref_import = (gpr_avl_ref_type) GetProcAddress(library, "gpr_avl_ref");
-  gpr_avl_unref_import = (gpr_avl_unref_type) GetProcAddress(library, "gpr_avl_unref");
-  gpr_avl_add_import = (gpr_avl_add_type) GetProcAddress(library, "gpr_avl_add");
-  gpr_avl_remove_import = (gpr_avl_remove_type) GetProcAddress(library, "gpr_avl_remove");
-  gpr_avl_get_import = (gpr_avl_get_type) GetProcAddress(library, "gpr_avl_get");
-  gpr_avl_maybe_get_import = (gpr_avl_maybe_get_type) GetProcAddress(library, "gpr_avl_maybe_get");
-  gpr_avl_is_empty_import = (gpr_avl_is_empty_type) GetProcAddress(library, "gpr_avl_is_empty");
-  gpr_cmdline_create_import = (gpr_cmdline_create_type) GetProcAddress(library, "gpr_cmdline_create");
-  gpr_cmdline_add_int_import = (gpr_cmdline_add_int_type) GetProcAddress(library, "gpr_cmdline_add_int");
-  gpr_cmdline_add_flag_import = (gpr_cmdline_add_flag_type) GetProcAddress(library, "gpr_cmdline_add_flag");
-  gpr_cmdline_add_string_import = (gpr_cmdline_add_string_type) GetProcAddress(library, "gpr_cmdline_add_string");
-  gpr_cmdline_on_extra_arg_import = (gpr_cmdline_on_extra_arg_type) GetProcAddress(library, "gpr_cmdline_on_extra_arg");
-  gpr_cmdline_set_survive_failure_import = (gpr_cmdline_set_survive_failure_type) GetProcAddress(library, "gpr_cmdline_set_survive_failure");
-  gpr_cmdline_parse_import = (gpr_cmdline_parse_type) GetProcAddress(library, "gpr_cmdline_parse");
-  gpr_cmdline_destroy_import = (gpr_cmdline_destroy_type) GetProcAddress(library, "gpr_cmdline_destroy");
-  gpr_cmdline_usage_string_import = (gpr_cmdline_usage_string_type) GetProcAddress(library, "gpr_cmdline_usage_string");
-  gpr_cpu_num_cores_import = (gpr_cpu_num_cores_type) GetProcAddress(library, "gpr_cpu_num_cores");
-  gpr_cpu_current_cpu_import = (gpr_cpu_current_cpu_type) GetProcAddress(library, "gpr_cpu_current_cpu");
-  gpr_histogram_create_import = (gpr_histogram_create_type) GetProcAddress(library, "gpr_histogram_create");
-  gpr_histogram_destroy_import = (gpr_histogram_destroy_type) GetProcAddress(library, "gpr_histogram_destroy");
-  gpr_histogram_add_import = (gpr_histogram_add_type) GetProcAddress(library, "gpr_histogram_add");
-  gpr_histogram_merge_import = (gpr_histogram_merge_type) GetProcAddress(library, "gpr_histogram_merge");
-  gpr_histogram_percentile_import = (gpr_histogram_percentile_type) GetProcAddress(library, "gpr_histogram_percentile");
-  gpr_histogram_mean_import = (gpr_histogram_mean_type) GetProcAddress(library, "gpr_histogram_mean");
-  gpr_histogram_stddev_import = (gpr_histogram_stddev_type) GetProcAddress(library, "gpr_histogram_stddev");
-  gpr_histogram_variance_import = (gpr_histogram_variance_type) GetProcAddress(library, "gpr_histogram_variance");
-  gpr_histogram_maximum_import = (gpr_histogram_maximum_type) GetProcAddress(library, "gpr_histogram_maximum");
-  gpr_histogram_minimum_import = (gpr_histogram_minimum_type) GetProcAddress(library, "gpr_histogram_minimum");
-  gpr_histogram_count_import = (gpr_histogram_count_type) GetProcAddress(library, "gpr_histogram_count");
-  gpr_histogram_sum_import = (gpr_histogram_sum_type) GetProcAddress(library, "gpr_histogram_sum");
-  gpr_histogram_sum_of_squares_import = (gpr_histogram_sum_of_squares_type) GetProcAddress(library, "gpr_histogram_sum_of_squares");
-  gpr_histogram_get_contents_import = (gpr_histogram_get_contents_type) GetProcAddress(library, "gpr_histogram_get_contents");
-  gpr_histogram_merge_contents_import = (gpr_histogram_merge_contents_type) GetProcAddress(library, "gpr_histogram_merge_contents");
-  gpr_join_host_port_import = (gpr_join_host_port_type) GetProcAddress(library, "gpr_join_host_port");
-  gpr_split_host_port_import = (gpr_split_host_port_type) GetProcAddress(library, "gpr_split_host_port");
-  gpr_format_message_import = (gpr_format_message_type) GetProcAddress(library, "gpr_format_message");
-  gpr_strdup_import = (gpr_strdup_type) GetProcAddress(library, "gpr_strdup");
-  gpr_asprintf_import = (gpr_asprintf_type) GetProcAddress(library, "gpr_asprintf");
-  gpr_subprocess_binary_extension_import = (gpr_subprocess_binary_extension_type) GetProcAddress(library, "gpr_subprocess_binary_extension");
-  gpr_subprocess_create_import = (gpr_subprocess_create_type) GetProcAddress(library, "gpr_subprocess_create");
-  gpr_subprocess_destroy_import = (gpr_subprocess_destroy_type) GetProcAddress(library, "gpr_subprocess_destroy");
-  gpr_subprocess_join_import = (gpr_subprocess_join_type) GetProcAddress(library, "gpr_subprocess_join");
-  gpr_subprocess_interrupt_import = (gpr_subprocess_interrupt_type) GetProcAddress(library, "gpr_subprocess_interrupt");
-  gpr_thd_new_import = (gpr_thd_new_type) GetProcAddress(library, "gpr_thd_new");
-  gpr_thd_options_default_import = (gpr_thd_options_default_type) GetProcAddress(library, "gpr_thd_options_default");
-  gpr_thd_options_set_detached_import = (gpr_thd_options_set_detached_type) GetProcAddress(library, "gpr_thd_options_set_detached");
-  gpr_thd_options_set_joinable_import = (gpr_thd_options_set_joinable_type) GetProcAddress(library, "gpr_thd_options_set_joinable");
-  gpr_thd_options_is_detached_import = (gpr_thd_options_is_detached_type) GetProcAddress(library, "gpr_thd_options_is_detached");
-  gpr_thd_options_is_joinable_import = (gpr_thd_options_is_joinable_type) GetProcAddress(library, "gpr_thd_options_is_joinable");
-  gpr_thd_currentid_import = (gpr_thd_currentid_type) GetProcAddress(library, "gpr_thd_currentid");
-  gpr_thd_join_import = (gpr_thd_join_type) GetProcAddress(library, "gpr_thd_join");
 }
 
 #endif /* GPR_WINDOWS */
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index a2f5b86497b86fff3240f3347054381077c40064..b87abfd8efd5ad865b75243f881131a3a2a27334 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -40,28 +40,58 @@
 
 #include <windows.h>
 
+#include <grpc/byte_buffer.h>
 #include <grpc/census.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
 #include <grpc/grpc_posix.h>
 #include <grpc/grpc_security.h>
-#include <grpc/impl/codegen/alloc.h>
-#include <grpc/impl/codegen/byte_buffer.h>
-#include <grpc/impl/codegen/log.h>
-#include <grpc/impl/codegen/slice.h>
-#include <grpc/impl/codegen/slice_buffer.h>
-#include <grpc/impl/codegen/sync.h>
-#include <grpc/impl/codegen/time.h>
+#include <grpc/support/alloc.h>
 #include <grpc/support/avl.h>
 #include <grpc/support/cmdline.h>
 #include <grpc/support/cpu.h>
 #include <grpc/support/histogram.h>
 #include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
 #include <grpc/support/log_windows.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/subprocess.h>
+#include <grpc/support/sync.h>
 #include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(gpr_slice *slices, size_t nslices);
+extern grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
+#define grpc_raw_byte_buffer_create grpc_raw_byte_buffer_create_import
+typedef grpc_byte_buffer *(*grpc_raw_compressed_byte_buffer_create_type)(gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
+extern grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
+#define grpc_raw_compressed_byte_buffer_create grpc_raw_compressed_byte_buffer_create_import
+typedef grpc_byte_buffer *(*grpc_byte_buffer_copy_type)(grpc_byte_buffer *bb);
+extern grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
+#define grpc_byte_buffer_copy grpc_byte_buffer_copy_import
+typedef size_t(*grpc_byte_buffer_length_type)(grpc_byte_buffer *bb);
+extern grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
+#define grpc_byte_buffer_length grpc_byte_buffer_length_import
+typedef void(*grpc_byte_buffer_destroy_type)(grpc_byte_buffer *byte_buffer);
+extern grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
+#define grpc_byte_buffer_destroy grpc_byte_buffer_destroy_import
+typedef int(*grpc_byte_buffer_reader_init_type)(grpc_byte_buffer_reader *reader, grpc_byte_buffer *buffer);
+extern grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
+#define grpc_byte_buffer_reader_init grpc_byte_buffer_reader_init_import
+typedef void(*grpc_byte_buffer_reader_destroy_type)(grpc_byte_buffer_reader *reader);
+extern grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
+#define grpc_byte_buffer_reader_destroy grpc_byte_buffer_reader_destroy_import
+typedef int(*grpc_byte_buffer_reader_next_type)(grpc_byte_buffer_reader *reader, gpr_slice *slice);
+extern grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
+#define grpc_byte_buffer_reader_next grpc_byte_buffer_reader_next_import
+typedef gpr_slice(*grpc_byte_buffer_reader_readall_type)(grpc_byte_buffer_reader *reader);
+extern grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
+#define grpc_byte_buffer_reader_readall grpc_byte_buffer_reader_readall_import
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_from_reader_type)(grpc_byte_buffer_reader *reader);
+extern grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
+#define grpc_raw_byte_buffer_from_reader grpc_raw_byte_buffer_from_reader_import
 typedef int(*census_initialize_type)(int features);
 extern census_initialize_type census_initialize_import;
 #define census_initialize census_initialize_import
@@ -443,36 +473,114 @@ extern gpr_set_allocation_functions_type gpr_set_allocation_functions_import;
 typedef gpr_allocation_functions(*gpr_get_allocation_functions_type)();
 extern gpr_get_allocation_functions_type gpr_get_allocation_functions_import;
 #define gpr_get_allocation_functions gpr_get_allocation_functions_import
-typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(gpr_slice *slices, size_t nslices);
-extern grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
-#define grpc_raw_byte_buffer_create grpc_raw_byte_buffer_create_import
-typedef grpc_byte_buffer *(*grpc_raw_compressed_byte_buffer_create_type)(gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
-extern grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
-#define grpc_raw_compressed_byte_buffer_create grpc_raw_compressed_byte_buffer_create_import
-typedef grpc_byte_buffer *(*grpc_byte_buffer_copy_type)(grpc_byte_buffer *bb);
-extern grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
-#define grpc_byte_buffer_copy grpc_byte_buffer_copy_import
-typedef size_t(*grpc_byte_buffer_length_type)(grpc_byte_buffer *bb);
-extern grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
-#define grpc_byte_buffer_length grpc_byte_buffer_length_import
-typedef void(*grpc_byte_buffer_destroy_type)(grpc_byte_buffer *byte_buffer);
-extern grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
-#define grpc_byte_buffer_destroy grpc_byte_buffer_destroy_import
-typedef int(*grpc_byte_buffer_reader_init_type)(grpc_byte_buffer_reader *reader, grpc_byte_buffer *buffer);
-extern grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
-#define grpc_byte_buffer_reader_init grpc_byte_buffer_reader_init_import
-typedef void(*grpc_byte_buffer_reader_destroy_type)(grpc_byte_buffer_reader *reader);
-extern grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
-#define grpc_byte_buffer_reader_destroy grpc_byte_buffer_reader_destroy_import
-typedef int(*grpc_byte_buffer_reader_next_type)(grpc_byte_buffer_reader *reader, gpr_slice *slice);
-extern grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
-#define grpc_byte_buffer_reader_next grpc_byte_buffer_reader_next_import
-typedef gpr_slice(*grpc_byte_buffer_reader_readall_type)(grpc_byte_buffer_reader *reader);
-extern grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
-#define grpc_byte_buffer_reader_readall grpc_byte_buffer_reader_readall_import
-typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_from_reader_type)(grpc_byte_buffer_reader *reader);
-extern grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
-#define grpc_raw_byte_buffer_from_reader grpc_raw_byte_buffer_from_reader_import
+typedef gpr_avl(*gpr_avl_create_type)(const gpr_avl_vtable *vtable);
+extern gpr_avl_create_type gpr_avl_create_import;
+#define gpr_avl_create gpr_avl_create_import
+typedef gpr_avl(*gpr_avl_ref_type)(gpr_avl avl);
+extern gpr_avl_ref_type gpr_avl_ref_import;
+#define gpr_avl_ref gpr_avl_ref_import
+typedef void(*gpr_avl_unref_type)(gpr_avl avl);
+extern gpr_avl_unref_type gpr_avl_unref_import;
+#define gpr_avl_unref gpr_avl_unref_import
+typedef gpr_avl(*gpr_avl_add_type)(gpr_avl avl, void *key, void *value);
+extern gpr_avl_add_type gpr_avl_add_import;
+#define gpr_avl_add gpr_avl_add_import
+typedef gpr_avl(*gpr_avl_remove_type)(gpr_avl avl, void *key);
+extern gpr_avl_remove_type gpr_avl_remove_import;
+#define gpr_avl_remove gpr_avl_remove_import
+typedef void *(*gpr_avl_get_type)(gpr_avl avl, void *key);
+extern gpr_avl_get_type gpr_avl_get_import;
+#define gpr_avl_get gpr_avl_get_import
+typedef int(*gpr_avl_maybe_get_type)(gpr_avl avl, void *key, void **value);
+extern gpr_avl_maybe_get_type gpr_avl_maybe_get_import;
+#define gpr_avl_maybe_get gpr_avl_maybe_get_import
+typedef int(*gpr_avl_is_empty_type)(gpr_avl avl);
+extern gpr_avl_is_empty_type gpr_avl_is_empty_import;
+#define gpr_avl_is_empty gpr_avl_is_empty_import
+typedef gpr_cmdline *(*gpr_cmdline_create_type)(const char *description);
+extern gpr_cmdline_create_type gpr_cmdline_create_import;
+#define gpr_cmdline_create gpr_cmdline_create_import
+typedef void(*gpr_cmdline_add_int_type)(gpr_cmdline *cl, const char *name, const char *help, int *value);
+extern gpr_cmdline_add_int_type gpr_cmdline_add_int_import;
+#define gpr_cmdline_add_int gpr_cmdline_add_int_import
+typedef void(*gpr_cmdline_add_flag_type)(gpr_cmdline *cl, const char *name, const char *help, int *value);
+extern gpr_cmdline_add_flag_type gpr_cmdline_add_flag_import;
+#define gpr_cmdline_add_flag gpr_cmdline_add_flag_import
+typedef void(*gpr_cmdline_add_string_type)(gpr_cmdline *cl, const char *name, const char *help, char **value);
+extern gpr_cmdline_add_string_type gpr_cmdline_add_string_import;
+#define gpr_cmdline_add_string gpr_cmdline_add_string_import
+typedef void(*gpr_cmdline_on_extra_arg_type)(gpr_cmdline *cl, const char *name, const char *help, void (*on_extra_arg)(void *user_data, const char *arg), void *user_data);
+extern gpr_cmdline_on_extra_arg_type gpr_cmdline_on_extra_arg_import;
+#define gpr_cmdline_on_extra_arg gpr_cmdline_on_extra_arg_import
+typedef void(*gpr_cmdline_set_survive_failure_type)(gpr_cmdline *cl);
+extern gpr_cmdline_set_survive_failure_type gpr_cmdline_set_survive_failure_import;
+#define gpr_cmdline_set_survive_failure gpr_cmdline_set_survive_failure_import
+typedef int(*gpr_cmdline_parse_type)(gpr_cmdline *cl, int argc, char **argv);
+extern gpr_cmdline_parse_type gpr_cmdline_parse_import;
+#define gpr_cmdline_parse gpr_cmdline_parse_import
+typedef void(*gpr_cmdline_destroy_type)(gpr_cmdline *cl);
+extern gpr_cmdline_destroy_type gpr_cmdline_destroy_import;
+#define gpr_cmdline_destroy gpr_cmdline_destroy_import
+typedef char *(*gpr_cmdline_usage_string_type)(gpr_cmdline *cl, const char *argv0);
+extern gpr_cmdline_usage_string_type gpr_cmdline_usage_string_import;
+#define gpr_cmdline_usage_string gpr_cmdline_usage_string_import
+typedef unsigned(*gpr_cpu_num_cores_type)(void);
+extern gpr_cpu_num_cores_type gpr_cpu_num_cores_import;
+#define gpr_cpu_num_cores gpr_cpu_num_cores_import
+typedef unsigned(*gpr_cpu_current_cpu_type)(void);
+extern gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
+#define gpr_cpu_current_cpu gpr_cpu_current_cpu_import
+typedef gpr_histogram *(*gpr_histogram_create_type)(double resolution, double max_bucket_start);
+extern gpr_histogram_create_type gpr_histogram_create_import;
+#define gpr_histogram_create gpr_histogram_create_import
+typedef void(*gpr_histogram_destroy_type)(gpr_histogram *h);
+extern gpr_histogram_destroy_type gpr_histogram_destroy_import;
+#define gpr_histogram_destroy gpr_histogram_destroy_import
+typedef void(*gpr_histogram_add_type)(gpr_histogram *h, double x);
+extern gpr_histogram_add_type gpr_histogram_add_import;
+#define gpr_histogram_add gpr_histogram_add_import
+typedef int(*gpr_histogram_merge_type)(gpr_histogram *dst, const gpr_histogram *src);
+extern gpr_histogram_merge_type gpr_histogram_merge_import;
+#define gpr_histogram_merge gpr_histogram_merge_import
+typedef double(*gpr_histogram_percentile_type)(gpr_histogram *histogram, double percentile);
+extern gpr_histogram_percentile_type gpr_histogram_percentile_import;
+#define gpr_histogram_percentile gpr_histogram_percentile_import
+typedef double(*gpr_histogram_mean_type)(gpr_histogram *histogram);
+extern gpr_histogram_mean_type gpr_histogram_mean_import;
+#define gpr_histogram_mean gpr_histogram_mean_import
+typedef double(*gpr_histogram_stddev_type)(gpr_histogram *histogram);
+extern gpr_histogram_stddev_type gpr_histogram_stddev_import;
+#define gpr_histogram_stddev gpr_histogram_stddev_import
+typedef double(*gpr_histogram_variance_type)(gpr_histogram *histogram);
+extern gpr_histogram_variance_type gpr_histogram_variance_import;
+#define gpr_histogram_variance gpr_histogram_variance_import
+typedef double(*gpr_histogram_maximum_type)(gpr_histogram *histogram);
+extern gpr_histogram_maximum_type gpr_histogram_maximum_import;
+#define gpr_histogram_maximum gpr_histogram_maximum_import
+typedef double(*gpr_histogram_minimum_type)(gpr_histogram *histogram);
+extern gpr_histogram_minimum_type gpr_histogram_minimum_import;
+#define gpr_histogram_minimum gpr_histogram_minimum_import
+typedef double(*gpr_histogram_count_type)(gpr_histogram *histogram);
+extern gpr_histogram_count_type gpr_histogram_count_import;
+#define gpr_histogram_count gpr_histogram_count_import
+typedef double(*gpr_histogram_sum_type)(gpr_histogram *histogram);
+extern gpr_histogram_sum_type gpr_histogram_sum_import;
+#define gpr_histogram_sum gpr_histogram_sum_import
+typedef double(*gpr_histogram_sum_of_squares_type)(gpr_histogram *histogram);
+extern gpr_histogram_sum_of_squares_type gpr_histogram_sum_of_squares_import;
+#define gpr_histogram_sum_of_squares gpr_histogram_sum_of_squares_import
+typedef const uint32_t *(*gpr_histogram_get_contents_type)(gpr_histogram *histogram, size_t *count);
+extern gpr_histogram_get_contents_type gpr_histogram_get_contents_import;
+#define gpr_histogram_get_contents gpr_histogram_get_contents_import
+typedef void(*gpr_histogram_merge_contents_type)(gpr_histogram *histogram, const uint32_t *data, size_t data_count, double min_seen, double max_seen, double sum, double sum_of_squares, double count);
+extern gpr_histogram_merge_contents_type gpr_histogram_merge_contents_import;
+#define gpr_histogram_merge_contents gpr_histogram_merge_contents_import
+typedef int(*gpr_join_host_port_type)(char **out, const char *host, int port);
+extern gpr_join_host_port_type gpr_join_host_port_import;
+#define gpr_join_host_port gpr_join_host_port_import
+typedef int(*gpr_split_host_port_type)(const char *name, char **host, char **port);
+extern gpr_split_host_port_type gpr_split_host_port_import;
+#define gpr_split_host_port gpr_split_host_port_import
 typedef void(*gpr_log_type)(const char *file, int line, gpr_log_severity severity, const char *format, ...) GPRC_PRINT_FORMAT_CHECK(4, 5);
 extern gpr_log_type gpr_log_import;
 #define gpr_log gpr_log_import
@@ -488,6 +596,9 @@ extern gpr_log_verbosity_init_type gpr_log_verbosity_init_import;
 typedef void(*gpr_set_log_function_type)(gpr_log_func func);
 extern gpr_set_log_function_type gpr_set_log_function_import;
 #define gpr_set_log_function gpr_set_log_function_import
+typedef char *(*gpr_format_message_type)(int messageid);
+extern gpr_format_message_type gpr_format_message_import;
+#define gpr_format_message gpr_format_message_import
 typedef gpr_slice(*gpr_slice_ref_type)(gpr_slice s);
 extern gpr_slice_ref_type gpr_slice_ref_import;
 #define gpr_slice_ref gpr_slice_ref_import
@@ -575,6 +686,27 @@ extern gpr_slice_buffer_move_first_type gpr_slice_buffer_move_first_import;
 typedef gpr_slice(*gpr_slice_buffer_take_first_type)(gpr_slice_buffer *src);
 extern gpr_slice_buffer_take_first_type gpr_slice_buffer_take_first_import;
 #define gpr_slice_buffer_take_first gpr_slice_buffer_take_first_import
+typedef char *(*gpr_strdup_type)(const char *src);
+extern gpr_strdup_type gpr_strdup_import;
+#define gpr_strdup gpr_strdup_import
+typedef int(*gpr_asprintf_type)(char **strp, const char *format, ...) GPRC_PRINT_FORMAT_CHECK(2, 3);
+extern gpr_asprintf_type gpr_asprintf_import;
+#define gpr_asprintf gpr_asprintf_import
+typedef const char *(*gpr_subprocess_binary_extension_type)();
+extern gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
+#define gpr_subprocess_binary_extension gpr_subprocess_binary_extension_import
+typedef gpr_subprocess *(*gpr_subprocess_create_type)(int argc, const char **argv);
+extern gpr_subprocess_create_type gpr_subprocess_create_import;
+#define gpr_subprocess_create gpr_subprocess_create_import
+typedef void(*gpr_subprocess_destroy_type)(gpr_subprocess *p);
+extern gpr_subprocess_destroy_type gpr_subprocess_destroy_import;
+#define gpr_subprocess_destroy gpr_subprocess_destroy_import
+typedef int(*gpr_subprocess_join_type)(gpr_subprocess *p);
+extern gpr_subprocess_join_type gpr_subprocess_join_import;
+#define gpr_subprocess_join gpr_subprocess_join_import
+typedef void(*gpr_subprocess_interrupt_type)(gpr_subprocess *p);
+extern gpr_subprocess_interrupt_type gpr_subprocess_interrupt_import;
+#define gpr_subprocess_interrupt gpr_subprocess_interrupt_import
 typedef void(*gpr_mu_init_type)(gpr_mu *mu);
 extern gpr_mu_init_type gpr_mu_init_import;
 #define gpr_mu_init gpr_mu_init_import
@@ -644,6 +776,30 @@ extern gpr_stats_inc_type gpr_stats_inc_import;
 typedef intptr_t(*gpr_stats_read_type)(const gpr_stats_counter *c);
 extern gpr_stats_read_type gpr_stats_read_import;
 #define gpr_stats_read gpr_stats_read_import
+typedef int(*gpr_thd_new_type)(gpr_thd_id *t, void (*thd_body)(void *arg), void *arg, const gpr_thd_options *options);
+extern gpr_thd_new_type gpr_thd_new_import;
+#define gpr_thd_new gpr_thd_new_import
+typedef gpr_thd_options(*gpr_thd_options_default_type)(void);
+extern gpr_thd_options_default_type gpr_thd_options_default_import;
+#define gpr_thd_options_default gpr_thd_options_default_import
+typedef void(*gpr_thd_options_set_detached_type)(gpr_thd_options *options);
+extern gpr_thd_options_set_detached_type gpr_thd_options_set_detached_import;
+#define gpr_thd_options_set_detached gpr_thd_options_set_detached_import
+typedef void(*gpr_thd_options_set_joinable_type)(gpr_thd_options *options);
+extern gpr_thd_options_set_joinable_type gpr_thd_options_set_joinable_import;
+#define gpr_thd_options_set_joinable gpr_thd_options_set_joinable_import
+typedef int(*gpr_thd_options_is_detached_type)(const gpr_thd_options *options);
+extern gpr_thd_options_is_detached_type gpr_thd_options_is_detached_import;
+#define gpr_thd_options_is_detached gpr_thd_options_is_detached_import
+typedef int(*gpr_thd_options_is_joinable_type)(const gpr_thd_options *options);
+extern gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
+#define gpr_thd_options_is_joinable gpr_thd_options_is_joinable_import
+typedef gpr_thd_id(*gpr_thd_currentid_type)(void);
+extern gpr_thd_currentid_type gpr_thd_currentid_import;
+#define gpr_thd_currentid gpr_thd_currentid_import
+typedef void(*gpr_thd_join_type)(gpr_thd_id t);
+extern gpr_thd_join_type gpr_thd_join_import;
+#define gpr_thd_join gpr_thd_join_import
 typedef gpr_timespec(*gpr_time_0_type)(gpr_clock_type type);
 extern gpr_time_0_type gpr_time_0_import;
 #define gpr_time_0 gpr_time_0_import
@@ -707,162 +863,6 @@ extern gpr_sleep_until_type gpr_sleep_until_import;
 typedef double(*gpr_timespec_to_micros_type)(gpr_timespec t);
 extern gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
 #define gpr_timespec_to_micros gpr_timespec_to_micros_import
-typedef gpr_avl(*gpr_avl_create_type)(const gpr_avl_vtable *vtable);
-extern gpr_avl_create_type gpr_avl_create_import;
-#define gpr_avl_create gpr_avl_create_import
-typedef gpr_avl(*gpr_avl_ref_type)(gpr_avl avl);
-extern gpr_avl_ref_type gpr_avl_ref_import;
-#define gpr_avl_ref gpr_avl_ref_import
-typedef void(*gpr_avl_unref_type)(gpr_avl avl);
-extern gpr_avl_unref_type gpr_avl_unref_import;
-#define gpr_avl_unref gpr_avl_unref_import
-typedef gpr_avl(*gpr_avl_add_type)(gpr_avl avl, void *key, void *value);
-extern gpr_avl_add_type gpr_avl_add_import;
-#define gpr_avl_add gpr_avl_add_import
-typedef gpr_avl(*gpr_avl_remove_type)(gpr_avl avl, void *key);
-extern gpr_avl_remove_type gpr_avl_remove_import;
-#define gpr_avl_remove gpr_avl_remove_import
-typedef void *(*gpr_avl_get_type)(gpr_avl avl, void *key);
-extern gpr_avl_get_type gpr_avl_get_import;
-#define gpr_avl_get gpr_avl_get_import
-typedef int(*gpr_avl_maybe_get_type)(gpr_avl avl, void *key, void **value);
-extern gpr_avl_maybe_get_type gpr_avl_maybe_get_import;
-#define gpr_avl_maybe_get gpr_avl_maybe_get_import
-typedef int(*gpr_avl_is_empty_type)(gpr_avl avl);
-extern gpr_avl_is_empty_type gpr_avl_is_empty_import;
-#define gpr_avl_is_empty gpr_avl_is_empty_import
-typedef gpr_cmdline *(*gpr_cmdline_create_type)(const char *description);
-extern gpr_cmdline_create_type gpr_cmdline_create_import;
-#define gpr_cmdline_create gpr_cmdline_create_import
-typedef void(*gpr_cmdline_add_int_type)(gpr_cmdline *cl, const char *name, const char *help, int *value);
-extern gpr_cmdline_add_int_type gpr_cmdline_add_int_import;
-#define gpr_cmdline_add_int gpr_cmdline_add_int_import
-typedef void(*gpr_cmdline_add_flag_type)(gpr_cmdline *cl, const char *name, const char *help, int *value);
-extern gpr_cmdline_add_flag_type gpr_cmdline_add_flag_import;
-#define gpr_cmdline_add_flag gpr_cmdline_add_flag_import
-typedef void(*gpr_cmdline_add_string_type)(gpr_cmdline *cl, const char *name, const char *help, char **value);
-extern gpr_cmdline_add_string_type gpr_cmdline_add_string_import;
-#define gpr_cmdline_add_string gpr_cmdline_add_string_import
-typedef void(*gpr_cmdline_on_extra_arg_type)(gpr_cmdline *cl, const char *name, const char *help, void (*on_extra_arg)(void *user_data, const char *arg), void *user_data);
-extern gpr_cmdline_on_extra_arg_type gpr_cmdline_on_extra_arg_import;
-#define gpr_cmdline_on_extra_arg gpr_cmdline_on_extra_arg_import
-typedef void(*gpr_cmdline_set_survive_failure_type)(gpr_cmdline *cl);
-extern gpr_cmdline_set_survive_failure_type gpr_cmdline_set_survive_failure_import;
-#define gpr_cmdline_set_survive_failure gpr_cmdline_set_survive_failure_import
-typedef int(*gpr_cmdline_parse_type)(gpr_cmdline *cl, int argc, char **argv);
-extern gpr_cmdline_parse_type gpr_cmdline_parse_import;
-#define gpr_cmdline_parse gpr_cmdline_parse_import
-typedef void(*gpr_cmdline_destroy_type)(gpr_cmdline *cl);
-extern gpr_cmdline_destroy_type gpr_cmdline_destroy_import;
-#define gpr_cmdline_destroy gpr_cmdline_destroy_import
-typedef char *(*gpr_cmdline_usage_string_type)(gpr_cmdline *cl, const char *argv0);
-extern gpr_cmdline_usage_string_type gpr_cmdline_usage_string_import;
-#define gpr_cmdline_usage_string gpr_cmdline_usage_string_import
-typedef unsigned(*gpr_cpu_num_cores_type)(void);
-extern gpr_cpu_num_cores_type gpr_cpu_num_cores_import;
-#define gpr_cpu_num_cores gpr_cpu_num_cores_import
-typedef unsigned(*gpr_cpu_current_cpu_type)(void);
-extern gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
-#define gpr_cpu_current_cpu gpr_cpu_current_cpu_import
-typedef gpr_histogram *(*gpr_histogram_create_type)(double resolution, double max_bucket_start);
-extern gpr_histogram_create_type gpr_histogram_create_import;
-#define gpr_histogram_create gpr_histogram_create_import
-typedef void(*gpr_histogram_destroy_type)(gpr_histogram *h);
-extern gpr_histogram_destroy_type gpr_histogram_destroy_import;
-#define gpr_histogram_destroy gpr_histogram_destroy_import
-typedef void(*gpr_histogram_add_type)(gpr_histogram *h, double x);
-extern gpr_histogram_add_type gpr_histogram_add_import;
-#define gpr_histogram_add gpr_histogram_add_import
-typedef int(*gpr_histogram_merge_type)(gpr_histogram *dst, const gpr_histogram *src);
-extern gpr_histogram_merge_type gpr_histogram_merge_import;
-#define gpr_histogram_merge gpr_histogram_merge_import
-typedef double(*gpr_histogram_percentile_type)(gpr_histogram *histogram, double percentile);
-extern gpr_histogram_percentile_type gpr_histogram_percentile_import;
-#define gpr_histogram_percentile gpr_histogram_percentile_import
-typedef double(*gpr_histogram_mean_type)(gpr_histogram *histogram);
-extern gpr_histogram_mean_type gpr_histogram_mean_import;
-#define gpr_histogram_mean gpr_histogram_mean_import
-typedef double(*gpr_histogram_stddev_type)(gpr_histogram *histogram);
-extern gpr_histogram_stddev_type gpr_histogram_stddev_import;
-#define gpr_histogram_stddev gpr_histogram_stddev_import
-typedef double(*gpr_histogram_variance_type)(gpr_histogram *histogram);
-extern gpr_histogram_variance_type gpr_histogram_variance_import;
-#define gpr_histogram_variance gpr_histogram_variance_import
-typedef double(*gpr_histogram_maximum_type)(gpr_histogram *histogram);
-extern gpr_histogram_maximum_type gpr_histogram_maximum_import;
-#define gpr_histogram_maximum gpr_histogram_maximum_import
-typedef double(*gpr_histogram_minimum_type)(gpr_histogram *histogram);
-extern gpr_histogram_minimum_type gpr_histogram_minimum_import;
-#define gpr_histogram_minimum gpr_histogram_minimum_import
-typedef double(*gpr_histogram_count_type)(gpr_histogram *histogram);
-extern gpr_histogram_count_type gpr_histogram_count_import;
-#define gpr_histogram_count gpr_histogram_count_import
-typedef double(*gpr_histogram_sum_type)(gpr_histogram *histogram);
-extern gpr_histogram_sum_type gpr_histogram_sum_import;
-#define gpr_histogram_sum gpr_histogram_sum_import
-typedef double(*gpr_histogram_sum_of_squares_type)(gpr_histogram *histogram);
-extern gpr_histogram_sum_of_squares_type gpr_histogram_sum_of_squares_import;
-#define gpr_histogram_sum_of_squares gpr_histogram_sum_of_squares_import
-typedef const uint32_t *(*gpr_histogram_get_contents_type)(gpr_histogram *histogram, size_t *count);
-extern gpr_histogram_get_contents_type gpr_histogram_get_contents_import;
-#define gpr_histogram_get_contents gpr_histogram_get_contents_import
-typedef void(*gpr_histogram_merge_contents_type)(gpr_histogram *histogram, const uint32_t *data, size_t data_count, double min_seen, double max_seen, double sum, double sum_of_squares, double count);
-extern gpr_histogram_merge_contents_type gpr_histogram_merge_contents_import;
-#define gpr_histogram_merge_contents gpr_histogram_merge_contents_import
-typedef int(*gpr_join_host_port_type)(char **out, const char *host, int port);
-extern gpr_join_host_port_type gpr_join_host_port_import;
-#define gpr_join_host_port gpr_join_host_port_import
-typedef int(*gpr_split_host_port_type)(const char *name, char **host, char **port);
-extern gpr_split_host_port_type gpr_split_host_port_import;
-#define gpr_split_host_port gpr_split_host_port_import
-typedef char *(*gpr_format_message_type)(int messageid);
-extern gpr_format_message_type gpr_format_message_import;
-#define gpr_format_message gpr_format_message_import
-typedef char *(*gpr_strdup_type)(const char *src);
-extern gpr_strdup_type gpr_strdup_import;
-#define gpr_strdup gpr_strdup_import
-typedef int(*gpr_asprintf_type)(char **strp, const char *format, ...) GPRC_PRINT_FORMAT_CHECK(2, 3);
-extern gpr_asprintf_type gpr_asprintf_import;
-#define gpr_asprintf gpr_asprintf_import
-typedef const char *(*gpr_subprocess_binary_extension_type)();
-extern gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
-#define gpr_subprocess_binary_extension gpr_subprocess_binary_extension_import
-typedef gpr_subprocess *(*gpr_subprocess_create_type)(int argc, const char **argv);
-extern gpr_subprocess_create_type gpr_subprocess_create_import;
-#define gpr_subprocess_create gpr_subprocess_create_import
-typedef void(*gpr_subprocess_destroy_type)(gpr_subprocess *p);
-extern gpr_subprocess_destroy_type gpr_subprocess_destroy_import;
-#define gpr_subprocess_destroy gpr_subprocess_destroy_import
-typedef int(*gpr_subprocess_join_type)(gpr_subprocess *p);
-extern gpr_subprocess_join_type gpr_subprocess_join_import;
-#define gpr_subprocess_join gpr_subprocess_join_import
-typedef void(*gpr_subprocess_interrupt_type)(gpr_subprocess *p);
-extern gpr_subprocess_interrupt_type gpr_subprocess_interrupt_import;
-#define gpr_subprocess_interrupt gpr_subprocess_interrupt_import
-typedef int(*gpr_thd_new_type)(gpr_thd_id *t, void (*thd_body)(void *arg), void *arg, const gpr_thd_options *options);
-extern gpr_thd_new_type gpr_thd_new_import;
-#define gpr_thd_new gpr_thd_new_import
-typedef gpr_thd_options(*gpr_thd_options_default_type)(void);
-extern gpr_thd_options_default_type gpr_thd_options_default_import;
-#define gpr_thd_options_default gpr_thd_options_default_import
-typedef void(*gpr_thd_options_set_detached_type)(gpr_thd_options *options);
-extern gpr_thd_options_set_detached_type gpr_thd_options_set_detached_import;
-#define gpr_thd_options_set_detached gpr_thd_options_set_detached_import
-typedef void(*gpr_thd_options_set_joinable_type)(gpr_thd_options *options);
-extern gpr_thd_options_set_joinable_type gpr_thd_options_set_joinable_import;
-#define gpr_thd_options_set_joinable gpr_thd_options_set_joinable_import
-typedef int(*gpr_thd_options_is_detached_type)(const gpr_thd_options *options);
-extern gpr_thd_options_is_detached_type gpr_thd_options_is_detached_import;
-#define gpr_thd_options_is_detached gpr_thd_options_is_detached_import
-typedef int(*gpr_thd_options_is_joinable_type)(const gpr_thd_options *options);
-extern gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
-#define gpr_thd_options_is_joinable gpr_thd_options_is_joinable_import
-typedef gpr_thd_id(*gpr_thd_currentid_type)(void);
-extern gpr_thd_currentid_type gpr_thd_currentid_import;
-#define gpr_thd_currentid gpr_thd_currentid_import
-typedef void(*gpr_thd_join_type)(gpr_thd_id t);
-extern gpr_thd_join_type gpr_thd_join_import;
-#define gpr_thd_join gpr_thd_join_import
 
 void grpc_rb_load_imports(HMODULE library);
 
diff --git a/templates/src/csharp/build_packages.bat.template b/templates/src/csharp/build_packages.bat.template
index 5cbd8e3746d48a0c035edfaf932b1212f516c58c..87c4b5ae271cea51701462e9875fdc326131128b 100644
--- a/templates/src/csharp/build_packages.bat.template
+++ b/templates/src/csharp/build_packages.bat.template
@@ -31,6 +31,10 @@
   
   @rem Builds gRPC NuGet packages
   
+  @rem This way of building nuget packages is now obsolete. C# nuget packages
+  @rem with CoreCLR support are now being built using the dotnet cli
+  @rem in build_packages_dotnetcli.sh
+  
   @rem Current package versions
   set VERSION=${settings.csharp_version}
   set PROTOBUF_VERSION=3.0.0
@@ -79,8 +83,8 @@
   xcopy /Y /I *.nupkg ..\..\artifacts${"\\"}
   
   @rem create a zipfile with the artifacts as well
-  powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::CreateFromDirectory('..\..\artifacts', 'csharp_nugets.zip');"
-  xcopy /Y /I csharp_nugets.zip ..\..\artifacts${"\\"}
+  powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::CreateFromDirectory('..\..\artifacts', 'csharp_nugets_obsolete.zip');"
+  xcopy /Y /I csharp_nugets_obsolete.zip ..\..\artifacts${"\\"}
   
   goto :EOF
   
diff --git a/templates/src/csharp/build_packages_dotnetcli.sh.template b/templates/src/csharp/build_packages_dotnetcli.sh.template
index b8e40a090be748af9b380d3fe12ab59dfe787d31..99b049a5a148f99f9532f71bc144f54d459c665e 100755
--- a/templates/src/csharp/build_packages_dotnetcli.sh.template
+++ b/templates/src/csharp/build_packages_dotnetcli.sh.template
@@ -36,9 +36,6 @@
   
   mkdir -p ../../artifacts/
   
-  # IMPORTANT: NuGet packages generated by dotnet CLI are considered experimental.
-  # The official nugets are generated by src/csharp/build_packages.bat
-  
   mkdir -p nativelibs/windows_x86 nativelibs/windows_x64 ${"\\"}
       nativelibs/linux_x86 nativelibs/linux_x64 ${"\\"}
       nativelibs/macosx_x86 nativelibs/macosx_x64
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index 3eeb55d033dcaa296d15bf1a368ad378a60b8296..53bdf612fcf4e358093547582144fb065137c19f 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -38,22 +38,18 @@
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
 #include <grpc/grpc_security_constants.h>
-#include <grpc/impl/codegen/alloc.h>
 #include <grpc/impl/codegen/atm.h>
-#include <grpc/impl/codegen/byte_buffer.h>
 #include <grpc/impl/codegen/byte_buffer_reader.h>
 #include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/connectivity_state.h>
+#include <grpc/impl/codegen/gpr_types.h>
 #include <grpc/impl/codegen/grpc_types.h>
-#include <grpc/impl/codegen/log.h>
 #include <grpc/impl/codegen/port_platform.h>
 #include <grpc/impl/codegen/propagation_bits.h>
 #include <grpc/impl/codegen/slice.h>
-#include <grpc/impl/codegen/slice_buffer.h>
 #include <grpc/impl/codegen/status.h>
 #include <grpc/impl/codegen/sync.h>
 #include <grpc/impl/codegen/sync_generic.h>
-#include <grpc/impl/codegen/time.h>
 #include <grpc/status.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/atm.h>
diff --git a/test/core/util/test_config.c b/test/core/util/test_config.c
index 270d16600d31b026a6cdcc324aef06cfed1c18dc..479aeda8984ef6257be87be7a47935eba269d972 100644
--- a/test/core/util/test_config.c
+++ b/test/core/util/test_config.c
@@ -34,7 +34,6 @@
 #include "test/core/util/test_config.h"
 
 #include <grpc/support/log.h>
-#include <grpc/support/port_platform.h>
 #include <signal.h>
 #include <stdbool.h>
 #include <stdio.h>
diff --git a/test/cpp/codegen/codegen_test_full.cc b/test/cpp/codegen/codegen_test_full.cc
index 4500540baffedcc77f9ab71465dcf2ae58c70279..d6e2416b55025e0461388634bc818af1880a14c9 100644
--- a/test/cpp/codegen/codegen_test_full.cc
+++ b/test/cpp/codegen/codegen_test_full.cc
@@ -32,6 +32,7 @@
  */
 
 #include <grpc++/completion_queue.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
 namespace grpc {
diff --git a/test/cpp/end2end/client_crash_test.cc b/test/cpp/end2end/client_crash_test.cc
index 30b04fb9b9bdbc77866610a1436fd1302a2672e4..c452ad2beb4df849cc14e3ed6bbd1a0b24b1dd68 100644
--- a/test/cpp/end2end/client_crash_test.cc
+++ b/test/cpp/end2end/client_crash_test.cc
@@ -38,6 +38,7 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
+#include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 #include <gtest/gtest.h>
diff --git a/test/cpp/end2end/client_crash_test_server.cc b/test/cpp/end2end/client_crash_test_server.cc
index 9568ca26be70b026ad265650d491c8d4275f7887..6e1457407c1f8a1706df5a7e220162b78d170700 100644
--- a/test/cpp/end2end/client_crash_test_server.cc
+++ b/test/cpp/end2end/client_crash_test_server.cc
@@ -39,6 +39,8 @@
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc/support/log.h>
+
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 
 DEFINE_string(address, "", "Address to bind to");
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index 55d045a2981338ebb0ccee98c8048573725dc61c..66614922f1cef5a99419ea08f90ab8a918b7e135 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -44,6 +44,7 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
+#include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 #include <gtest/gtest.h>
diff --git a/test/cpp/end2end/mock_test.cc b/test/cpp/end2end/mock_test.cc
index 40526271221f468b9bec1d9feae96bdf65769128..0da5861b67d42b1f6c404762913fabcc4d694ee4 100644
--- a/test/cpp/end2end/mock_test.cc
+++ b/test/cpp/end2end/mock_test.cc
@@ -41,6 +41,7 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
+#include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 #include <gtest/gtest.h>
diff --git a/test/cpp/end2end/server_crash_test.cc b/test/cpp/end2end/server_crash_test.cc
index e4473602764d07283860c5fe836a142f0a15a687..16a5fa23222f35c686c07ca29010f1a638f1fb88 100644
--- a/test/cpp/end2end/server_crash_test.cc
+++ b/test/cpp/end2end/server_crash_test.cc
@@ -38,6 +38,7 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
+#include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 #include <gtest/gtest.h>
diff --git a/test/cpp/end2end/server_crash_test_client.cc b/test/cpp/end2end/server_crash_test_client.cc
index ece948d5a7302b5daf066ce4971b25e05359d8d2..10a251c952f2dabe437be28db0515171034ba97b 100644
--- a/test/cpp/end2end/server_crash_test_client.cc
+++ b/test/cpp/end2end/server_crash_test_client.cc
@@ -40,6 +40,8 @@
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
+#include <grpc/support/log.h>
+
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 
 DEFINE_string(address, "", "Address to connect to");
diff --git a/test/cpp/end2end/shutdown_test.cc b/test/cpp/end2end/shutdown_test.cc
index 3f98de6db7bb6bd78756814b4c229b755fac2448..4cba3b1c814748d5c6695938d46d8c0e1dcda74b 100644
--- a/test/cpp/end2end/shutdown_test.cc
+++ b/test/cpp/end2end/shutdown_test.cc
@@ -33,6 +33,8 @@
 
 #include <thread>
 
+#include <gtest/gtest.h>
+
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
@@ -40,8 +42,8 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
+#include <grpc/support/log.h>
 #include <grpc/support/sync.h>
-#include <gtest/gtest.h>
 
 #include "src/core/lib/support/env.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
diff --git a/test/cpp/end2end/streaming_throughput_test.cc b/test/cpp/end2end/streaming_throughput_test.cc
index 9e82c307011b8901f7247491196b1695f92f89a0..fbef761ca9cf60e3fb8605454b4ee518a5e22bd2 100644
--- a/test/cpp/end2end/streaming_throughput_test.cc
+++ b/test/cpp/end2end/streaming_throughput_test.cc
@@ -35,6 +35,8 @@
 #include <mutex>
 #include <thread>
 
+#include <gtest/gtest.h>
+
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
@@ -45,9 +47,9 @@
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
 #include <grpc/support/atm.h>
+#include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
diff --git a/test/cpp/end2end/test_service_impl.cc b/test/cpp/end2end/test_service_impl.cc
index 52abd80d690b9d0f94b0d7add1db3412a5ef3ab7..2de344efd586c27e040095595ddd30698a9e05f8 100644
--- a/test/cpp/end2end/test_service_impl.cc
+++ b/test/cpp/end2end/test_service_impl.cc
@@ -38,7 +38,8 @@
 
 #include <grpc++/security/credentials.h>
 #include <grpc++/server_context.h>
-#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+
 #include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
diff --git a/test/cpp/grpclb/grpclb_api_test.cc b/test/cpp/grpclb/grpclb_api_test.cc
index 33de1ee93c6a50981af2e16bd61f66140dbeff76..e67189c69ec4924dc2cd035226fc0c8a3bb33dd7 100644
--- a/test/cpp/grpclb/grpclb_api_test.cc
+++ b/test/cpp/grpclb/grpclb_api_test.cc
@@ -31,10 +31,12 @@
  *
  */
 
+#include <grpc++/impl/codegen/config.h>
 #include <gtest/gtest.h>
-#include <string>
 
 #include "src/core/ext/lb_policy/grpclb/load_balancer_api.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/proto/grpc/lb/v1/load_balancer.pb.h"  // C++ version
 
 namespace grpc {
@@ -45,8 +47,28 @@ using grpc::lb::v1::LoadBalanceResponse;
 
 class GrpclbTest : public ::testing::Test {};
 
+grpc::string Ip4ToPackedString(const char* ip_str) {
+  struct in_addr ip4;
+  GPR_ASSERT(inet_pton(AF_INET, ip_str, &ip4) == 1);
+  return grpc::string(reinterpret_cast<const char*>(&ip4), sizeof(ip4));
+}
+
+grpc::string PackedStringToIp(const grpc_grpclb_ip_address& pb_ip) {
+  char ip_str[46] = {0};
+  int af = -1;
+  if (pb_ip.size == 4) {
+    af = AF_INET;
+  } else if (pb_ip.size == 16) {
+    af = AF_INET6;
+  } else {
+    abort();
+  }
+  GPR_ASSERT(inet_ntop(af, pb_ip.bytes, ip_str, 46) != NULL);
+  return ip_str;
+}
+
 TEST_F(GrpclbTest, CreateRequest) {
-  const std::string service_name = "AServiceName";
+  const grpc::string service_name = "AServiceName";
   LoadBalanceRequest request;
   grpc_grpclb_request* c_req = grpc_grpclb_request_create(service_name.c_str());
   gpr_slice slice = grpc_grpclb_request_encode(c_req);
@@ -65,7 +87,7 @@ TEST_F(GrpclbTest, ParseInitialResponse) {
       initial_response->mutable_client_stats_report_interval();
   client_stats_report_interval->set_seconds(123);
   client_stats_report_interval->set_nanos(456);
-  const std::string encoded_response = response.SerializeAsString();
+  const grpc::string encoded_response = response.SerializeAsString();
   gpr_slice encoded_slice =
       gpr_slice_from_copied_string(encoded_response.c_str());
 
@@ -82,29 +104,31 @@ TEST_F(GrpclbTest, ParseResponseServerList) {
   LoadBalanceResponse response;
   auto* serverlist = response.mutable_server_list();
   auto* server = serverlist->add_servers();
-  server->set_ip_address("127.0.0.1");
+  server->set_ip_address(Ip4ToPackedString("127.0.0.1"));
   server->set_port(12345);
   server->set_drop_request(true);
   server = response.mutable_server_list()->add_servers();
-  server->set_ip_address("10.0.0.1");
+  server->set_ip_address(Ip4ToPackedString("10.0.0.1"));
   server->set_port(54321);
   server->set_drop_request(false);
   auto* expiration_interval = serverlist->mutable_expiration_interval();
   expiration_interval->set_seconds(888);
   expiration_interval->set_nanos(999);
 
-  const std::string encoded_response = response.SerializeAsString();
-  gpr_slice encoded_slice =
-      gpr_slice_from_copied_string(encoded_response.c_str());
+  const grpc::string encoded_response = response.SerializeAsString();
+  const gpr_slice encoded_slice = gpr_slice_from_copied_buffer(
+      encoded_response.data(), encoded_response.size());
   grpc_grpclb_serverlist* c_serverlist =
       grpc_grpclb_response_parse_serverlist(encoded_slice);
   ASSERT_EQ(c_serverlist->num_servers, 2ul);
   EXPECT_TRUE(c_serverlist->servers[0]->has_ip_address);
-  EXPECT_TRUE(strcmp(c_serverlist->servers[0]->ip_address, "127.0.0.1") == 0);
+  EXPECT_EQ(PackedStringToIp(c_serverlist->servers[0]->ip_address),
+            "127.0.0.1");
   EXPECT_EQ(c_serverlist->servers[0]->port, 12345);
   EXPECT_TRUE(c_serverlist->servers[0]->drop_request);
   EXPECT_TRUE(c_serverlist->servers[1]->has_ip_address);
-  EXPECT_TRUE(strcmp(c_serverlist->servers[1]->ip_address, "10.0.0.1") == 0);
+
+  EXPECT_EQ(PackedStringToIp(c_serverlist->servers[1]->ip_address), "10.0.0.1");
   EXPECT_EQ(c_serverlist->servers[1]->port, 54321);
   EXPECT_FALSE(c_serverlist->servers[1]->drop_request);
 
diff --git a/test/cpp/grpclb/grpclb_test.cc b/test/cpp/grpclb/grpclb_test.cc
index 6f6fb83c2331c09f951b860e818f4df073b82cf3..95abe38031b5b45aba65f6bcddfbc84dda7546dd 100644
--- a/test/cpp/grpclb/grpclb_test.cc
+++ b/test/cpp/grpclb/grpclb_test.cc
@@ -37,7 +37,10 @@
 #include <cstring>
 #include <string>
 
+#include <gtest/gtest.h>
+
 #include <grpc/grpc.h>
+#include <grpc/impl/codegen/byte_buffer_reader.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
@@ -46,9 +49,11 @@
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 
+#include <grpc++/impl/codegen/config.h>
 extern "C" {
 #include "src/core/ext/client_config/client_channel.h"
 #include "src/core/lib/channel/channel_stack.h"
+#include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/support/tmpfile.h"
 #include "src/core/lib/surface/channel.h"
@@ -61,16 +66,19 @@ extern "C" {
 #include "src/proto/grpc/lb/v1/load_balancer.pb.h"
 
 #define NUM_BACKENDS 4
+#define PAYLOAD "hello you"
 
 // TODO(dgq): Other scenarios in need of testing:
 // - Send an empty serverlist update and verify that the client request blocks
 //   until a new serverlist with actual contents is available.
 // - Send identical serverlist update
+// - Send a serverlist with faulty ip:port addresses (port > 2^16, etc).
 // - Test reception of invalid serverlist
 // - Test pinging
 // - Test against a non-LB server. That server should return UNIMPLEMENTED and
 //   the call should fail.
 // - Random LB server closing the stream unexpectedly.
+// - Test using DNS-resolvable names (localhost?)
 
 namespace grpc {
 namespace {
@@ -105,8 +113,8 @@ static gpr_slice build_response_payload_slice(
     int64_t expiration_interval_secs, int32_t expiration_interval_nanos) {
   // server_list {
   //   servers {
-  //     ip_address: "127.0.0.1"
-  //     port: ...
+  //     ip_address: <in_addr/6 bytes of an IP>
+  //     port: <16 bit uint>
   //     load_balance_token: "token..."
   //   }
   //   ...
@@ -125,21 +133,21 @@ static gpr_slice build_response_payload_slice(
   }
   for (size_t i = 0; i < nports; i++) {
     auto *server = serverlist->add_servers();
-    server->set_ip_address(host);
+    // TODO(dgq): test ipv6
+    struct in_addr ip4;
+    GPR_ASSERT(inet_pton(AF_INET, host, &ip4) == 1);
+    server->set_ip_address(
+        grpc::string(reinterpret_cast<const char *>(&ip4), sizeof(ip4)));
     server->set_port(ports[i]);
     // The following long long int cast is meant to work around the
     // disfunctional implementation of std::to_string in gcc 4.4, which doesn't
     // have a version for int but does have one for long long int.
-    server->set_load_balance_token("token" +
-                                   std::to_string((long long int)ports[i]));
+    string token_data = "token" + std::to_string((long long int)ports[i]);
+    token_data.resize(64, '-');
+    server->set_load_balance_token(token_data);
   }
-
-  gpr_log(GPR_INFO, "generating response: %s",
-          response.ShortDebugString().c_str());
-
-  const gpr_slice response_slice =
-      gpr_slice_from_copied_string(response.SerializeAsString().c_str());
-  return response_slice;
+  const grpc::string &enc_resp = response.SerializeAsString();
+  return gpr_slice_from_copied_buffer(enc_resp.data(), enc_resp.size());
 }
 
 static void drain_cq(grpc_completion_queue *cq) {
@@ -181,20 +189,9 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
   cq_verify(cqv);
   gpr_log(GPR_INFO, "LB Server[%s] after tag 200", sf->servers_hostport);
 
-  op = ops;
-  op->op = GRPC_OP_SEND_INITIAL_METADATA;
-  op->data.send_initial_metadata.count = 0;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
-  op->data.recv_close_on_server.cancelled = &was_cancelled;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(201), NULL);
-  GPR_ASSERT(GRPC_CALL_OK == error);
-  gpr_log(GPR_INFO, "LB Server[%s] after tag 201", sf->servers_hostport);
+  // make sure we've received the initial metadata from the grpclb request.
+  GPR_ASSERT(request_metadata_recv.count > 0);
+  GPR_ASSERT(request_metadata_recv.metadata != NULL);
 
   // receive request for backends
   op = ops;
@@ -208,9 +205,36 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
   CQ_EXPECT_COMPLETION(cqv, tag(202), 1);
   cq_verify(cqv);
   gpr_log(GPR_INFO, "LB Server[%s] after RECV_MSG", sf->servers_hostport);
-  // TODO(dgq): validate request.
+
+  // validate initial request.
+  grpc_byte_buffer_reader bbr;
+  grpc_byte_buffer_reader_init(&bbr, request_payload_recv);
+  gpr_slice request_payload_slice = grpc_byte_buffer_reader_readall(&bbr);
+  grpc::lb::v1::LoadBalanceRequest request;
+  request.ParseFromArray(GPR_SLICE_START_PTR(request_payload_slice),
+                         GPR_SLICE_LENGTH(request_payload_slice));
+  GPR_ASSERT(request.has_initial_request());
+  GPR_ASSERT(request.initial_request().name() == "load.balanced.service.name");
+  gpr_slice_unref(request_payload_slice);
+  grpc_byte_buffer_reader_destroy(&bbr);
   grpc_byte_buffer_destroy(request_payload_recv);
+
   gpr_slice response_payload_slice;
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(201), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+  gpr_log(GPR_INFO, "LB Server[%s] after tag 201", sf->servers_hostport);
+
   for (int i = 0; i < 2; i++) {
     if (i == 0) {
       // First half of the ports.
@@ -303,6 +327,16 @@ static void start_backend_server(server_fixture *sf) {
       return;
     }
     GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+
+    // The following long long int cast is meant to work around the
+    // disfunctional implementation of std::to_string in gcc 4.4, which doesn't
+    // have a version for int but does have one for long long int.
+    string expected_token = "token" + std::to_string((long long int)sf->port);
+    expected_token.resize(64, '-');
+    GPR_ASSERT(contains_metadata(&request_metadata_recv,
+                                 "load-reporting-initial",
+                                 expected_token.c_str()));
+
     gpr_log(GPR_INFO, "Server[%s] after tag 100", sf->servers_hostport);
 
     op = ops;
@@ -321,8 +355,7 @@ static void start_backend_server(server_fixture *sf) {
     gpr_log(GPR_INFO, "Server[%s] after tag 101", sf->servers_hostport);
 
     bool exit = false;
-    gpr_slice response_payload_slice =
-        gpr_slice_from_copied_string("hello you");
+    gpr_slice response_payload_slice = gpr_slice_from_copied_string(PAYLOAD);
     while (!exit) {
       op = ops;
       op->op = GRPC_OP_RECV_MESSAGE;
@@ -474,10 +507,9 @@ static void perform_request(client_fixture *cf) {
     error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), NULL);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
-    peer = grpc_call_get_peer(c);
     CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
     cq_verify(cqv);
-    gpr_free(peer);
+    GPR_ASSERT(byte_buffer_eq_string(response_payload_recv, PAYLOAD));
 
     grpc_byte_buffer_destroy(request_payload);
     grpc_byte_buffer_destroy(response_payload_recv);
@@ -583,27 +615,30 @@ static void fork_lb_server(void *arg) {
                   tf->lb_server_update_delay_ms);
 }
 
-static void setup_test_fixture(test_fixture *tf,
-                               int lb_server_update_delay_ms) {
-  tf->lb_server_update_delay_ms = lb_server_update_delay_ms;
+static test_fixture setup_test_fixture(int lb_server_update_delay_ms) {
+  test_fixture tf;
+  memset(&tf, 0, sizeof(tf));
+  tf.lb_server_update_delay_ms = lb_server_update_delay_ms;
 
   gpr_thd_options options = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&options);
 
   for (int i = 0; i < NUM_BACKENDS; ++i) {
-    setup_server("127.0.0.1", &tf->lb_backends[i]);
-    gpr_thd_new(&tf->lb_backends[i].tid, fork_backend_server,
-                &tf->lb_backends[i], &options);
+    setup_server("127.0.0.1", &tf.lb_backends[i]);
+    gpr_thd_new(&tf.lb_backends[i].tid, fork_backend_server, &tf.lb_backends[i],
+                &options);
   }
 
-  setup_server("127.0.0.1", &tf->lb_server);
-  gpr_thd_new(&tf->lb_server.tid, fork_lb_server, &tf->lb_server, &options);
+  setup_server("127.0.0.1", &tf.lb_server);
+  gpr_thd_new(&tf.lb_server.tid, fork_lb_server, &tf.lb_server, &options);
 
   char *server_uri;
   gpr_asprintf(&server_uri, "ipv4:%s?lb_policy=grpclb&lb_enabled=1",
-               tf->lb_server.servers_hostport);
-  setup_client(server_uri, &tf->client);
+               tf.lb_server.servers_hostport);
+  setup_client(server_uri, &tf.client);
   gpr_free(server_uri);
+
+  return tf;
 }
 
 static void teardown_test_fixture(test_fixture *tf) {
@@ -614,19 +649,13 @@ static void teardown_test_fixture(test_fixture *tf) {
   teardown_server(&tf->lb_server);
 }
 
-// The LB server will send two updates: batch 1 and batch 2. Each batch
-// contains
-// two addresses, both of a valid and running backend server. Batch 1 is
-// readily
-// available and provided as soon as the client establishes the streaming
-// call.
-// Batch 2 is sent after a delay of \a lb_server_update_delay_ms
-// milliseconds.
+// The LB server will send two updates: batch 1 and batch 2. Each batch contains
+// two addresses, both of a valid and running backend server. Batch 1 is readily
+// available and provided as soon as the client establishes the streaming call.
+// Batch 2 is sent after a delay of \a lb_server_update_delay_ms milliseconds.
 static test_fixture test_update(int lb_server_update_delay_ms) {
   gpr_log(GPR_INFO, "start %s(%d)", __func__, lb_server_update_delay_ms);
-  test_fixture tf;
-  memset(&tf, 0, sizeof(tf));
-  setup_test_fixture(&tf, lb_server_update_delay_ms);
+  test_fixture tf = setup_test_fixture(lb_server_update_delay_ms);
   perform_request(
       &tf.client);  // "consumes" 1st backend server of 1st serverlist
   perform_request(
@@ -642,13 +671,7 @@ static test_fixture test_update(int lb_server_update_delay_ms) {
   return tf;
 }
 
-}  // namespace
-}  // namespace grpc
-
-int main(int argc, char **argv) {
-  grpc_test_init(argc, argv);
-  grpc_init();
-
+TEST(GrpclbTest, Updates) {
   grpc::test_fixture tf_result;
   // Clients take a bit over one second to complete a call (the last part of the
   // call sleeps for 1 second while verifying the client's completion queue is
@@ -683,7 +706,18 @@ int main(int argc, char **argv) {
   GPR_ASSERT(tf_result.lb_backends[1].num_calls_serviced > 0);
   GPR_ASSERT(tf_result.lb_backends[2].num_calls_serviced > 0);
   GPR_ASSERT(tf_result.lb_backends[3].num_calls_serviced == 0);
+}
 
+TEST(GrpclbTest, InvalidAddressInServerlist) {}
+
+}  // namespace
+}  // namespace grpc
+
+int main(int argc, char **argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+  grpc_test_init(argc, argv);
+  grpc_init();
+  const auto result = RUN_ALL_TESTS();
   grpc_shutdown();
-  return 0;
+  return result;
 }
diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index e8ae6ee572325288b985596ec60d0da2d4d4894f..032b378b1a171b6d23669cac45cc0c517a1b2234 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -39,6 +39,7 @@
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index 8861bc1163c144bbf5c0c0b329b7a4be5f8d2eec..6117878a33f74e89aab029fbb3c93712b4b49f49 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -40,6 +40,7 @@
 #include <grpc++/client_context.h>
 #include <grpc++/security/credentials.h>
 #include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
diff --git a/test/cpp/interop/metrics_client.cc b/test/cpp/interop/metrics_client.cc
index 179de30805c89f4dbddeb5ead6de97764a908dc1..9d5212e9d506d346a2af87b333e82e853542fcc5 100644
--- a/test/cpp/interop/metrics_client.cc
+++ b/test/cpp/interop/metrics_client.cc
@@ -36,6 +36,7 @@
 
 #include <gflags/gflags.h>
 #include <grpc++/grpc++.h>
+#include <grpc/support/log.h>
 
 #include "src/proto/grpc/testing/metrics.grpc.pb.h"
 #include "src/proto/grpc/testing/metrics.pb.h"
diff --git a/test/cpp/interop/stress_interop_client.cc b/test/cpp/interop/stress_interop_client.cc
index 1d5fc80cf26cd135c8b10eeed5dbd3d6eaa84f06..0ea71e4cf454d1af12488040b183dd28cda2eadc 100644
--- a/test/cpp/interop/stress_interop_client.cc
+++ b/test/cpp/interop/stress_interop_client.cc
@@ -38,6 +38,7 @@
 #include <vector>
 
 #include <grpc++/create_channel.h>
+#include <grpc/support/log.h>
 
 #include "test/cpp/interop/interop_client.h"
 #include "test/cpp/util/metrics_server.h"
diff --git a/test/cpp/interop/stress_test.cc b/test/cpp/interop/stress_test.cc
index 77879319003f281692ef05a56fb9efbcc174e820..5647cb5531ce85cbd985dc471b40546b2a519cc1 100644
--- a/test/cpp/interop/stress_test.cc
+++ b/test/cpp/interop/stress_test.cc
@@ -41,6 +41,7 @@
 #include <grpc++/create_channel.h>
 #include <grpc++/grpc++.h>
 #include <grpc++/impl/thd.h>
+#include <grpc/support/log.h>
 #include <grpc/support/time.h>
 
 #include "src/proto/grpc/testing/metrics.grpc.pb.h"
diff --git a/test/cpp/qps/client.h b/test/cpp/qps/client.h
index fada4ba767965b300b59a852eedda42b9e90f43c..c8809cbc5b6bf7aec18e4589d3ffe43d42f1a289 100644
--- a/test/cpp/qps/client.h
+++ b/test/cpp/qps/client.h
@@ -129,13 +129,17 @@ class HistogramEntry GRPC_FINAL {
 
 class Client {
  public:
-  Client() : timer_(new UsageTimer), interarrival_timer_() {}
+  Client() : timer_(new UsageTimer), interarrival_timer_() {
+    gpr_event_init(&start_requests_);
+  }
   virtual ~Client() {}
 
   ClientStats Mark(bool reset) {
     Histogram latencies;
     UsageTimer::Result timer_result;
 
+    MaybeStartRequests();
+
     // avoid std::vector for old compilers that expect a copy constructor
     if (reset) {
       Histogram* to_merge = new Histogram[threads_.size()];
@@ -189,7 +193,10 @@ class Client {
     }
   }
 
-  void EndThreads() { threads_.clear(); }
+  void EndThreads() {
+    MaybeStartRequests();
+    threads_.clear();
+  }
 
   virtual void DestroyMultithreading() = 0;
   virtual bool ThreadFunc(HistogramEntry* histogram, size_t thread_idx) = 0;
@@ -265,6 +272,13 @@ class Client {
     Thread& operator=(const Thread&);
 
     void ThreadFunc() {
+      while (!gpr_event_wait(
+          &client_->start_requests_,
+          gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                       gpr_time_from_seconds(1, GPR_TIMESPAN)))) {
+        gpr_log(GPR_INFO, "Waiting for benchmark to start");
+      }
+
       for (;;) {
         // run the loop body
         HistogramEntry entry;
@@ -302,6 +316,16 @@ class Client {
   size_t threads_remaining_;
   std::condition_variable threads_complete_;
 
+  gpr_event start_requests_;
+  bool started_requests_;
+
+  void MaybeStartRequests() {
+    if (!started_requests_) {
+      started_requests_ = true;
+      gpr_event_set(&start_requests_, (void*)1);
+    }
+  }
+
   void CompleteThread() {
     std::lock_guard<std::mutex> g(thread_completion_mu_);
     threads_remaining_--;
@@ -359,7 +383,7 @@ class ClientImpl : public Client {
       gpr_log(GPR_INFO, "Connecting to %s", target.c_str());
       GPR_ASSERT(channel_->WaitForConnected(
           gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
-                       gpr_time_from_seconds(30, GPR_TIMESPAN))));
+                       gpr_time_from_seconds(300, GPR_TIMESPAN))));
       stub_ = create_stub(channel_);
     }
     Channel* get_channel() { return channel_.get(); }
diff --git a/test/cpp/qps/driver.cc b/test/cpp/qps/driver.cc
index f67f353c4dd9230dbf838314cc60177336a6f434..b4c18bcb46e1feb944ae5b400eadfc6ca630b340 100644
--- a/test/cpp/qps/driver.cc
+++ b/test/cpp/qps/driver.cc
@@ -366,12 +366,37 @@ std::unique_ptr<ScenarioResult> RunScenario(
     if (!clients[i].stream->Write(args)) {
       gpr_log(GPR_ERROR, "Could not write args to client %zu", i);
     }
+  }
+
+  for (size_t i = 0; i < num_clients; i++) {
     ClientStatus init_status;
     if (!clients[i].stream->Read(&init_status)) {
       gpr_log(GPR_ERROR, "Client %zu did not yield initial status", i);
     }
   }
 
+  // Send an initial mark: clients can use this to know that everything is ready
+  // to start
+  gpr_log(GPR_INFO, "Initiating");
+  ServerArgs server_mark;
+  server_mark.mutable_mark()->set_reset(true);
+  ClientArgs client_mark;
+  client_mark.mutable_mark()->set_reset(true);
+  ServerStatus server_status;
+  ClientStatus client_status;
+  for (size_t i = 0; i < num_clients; i++) {
+    auto client = &clients[i];
+    if (!client->stream->Write(client_mark)) {
+      gpr_log(GPR_ERROR, "Couldn't write mark to client %zu", i);
+    }
+  }
+  for (size_t i = 0; i < num_clients; i++) {
+    auto client = &clients[i];
+    if (!client->stream->Read(&client_status)) {
+      gpr_log(GPR_ERROR, "Couldn't get status from client %zu", i);
+    }
+  }
+
   // Let everything warmup
   gpr_log(GPR_INFO, "Warming up");
   gpr_timespec start = gpr_now(GPR_CLOCK_REALTIME);
@@ -380,10 +405,6 @@ std::unique_ptr<ScenarioResult> RunScenario(
 
   // Start a run
   gpr_log(GPR_INFO, "Starting");
-  ServerArgs server_mark;
-  server_mark.mutable_mark()->set_reset(true);
-  ClientArgs client_mark;
-  client_mark.mutable_mark()->set_reset(true);
   for (size_t i = 0; i < num_servers; i++) {
     auto server = &servers[i];
     if (!server->stream->Write(server_mark)) {
@@ -396,8 +417,6 @@ std::unique_ptr<ScenarioResult> RunScenario(
       gpr_log(GPR_ERROR, "Couldn't write mark to client %zu", i);
     }
   }
-  ServerStatus server_status;
-  ClientStatus client_status;
   for (size_t i = 0; i < num_servers; i++) {
     auto server = &servers[i];
     if (!server->stream->Read(&server_status)) {
diff --git a/test/cpp/util/metrics_server.cc b/test/cpp/util/metrics_server.cc
index 1c7cd6382a8f68c96be39bdae4536d59d58e6e49..9296d6515e822b131594eaa80f494f80992e0b6e 100644
--- a/test/cpp/util/metrics_server.cc
+++ b/test/cpp/util/metrics_server.cc
@@ -35,6 +35,7 @@
 
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
+#include <grpc/support/log.h>
 
 #include "src/proto/grpc/testing/metrics.grpc.pb.h"
 #include "src/proto/grpc/testing/metrics.pb.h"
diff --git a/test/cpp/util/proto_reflection_descriptor_database.h b/test/cpp/util/proto_reflection_descriptor_database.h
index eb7cf4907db77cb84e8c026f36fe21999b089512..0e69696d5fb32db33baa844945438d5a39ac0fd6 100644
--- a/test/cpp/util/proto_reflection_descriptor_database.h
+++ b/test/cpp/util/proto_reflection_descriptor_database.h
@@ -45,6 +45,8 @@
 #include <grpc++/ext/reflection.grpc.pb.h>
 #endif  // GRPC_NO_GENERATED_CODE
 #include <grpc++/grpc++.h>
+#include <grpc++/impl/codegen/config_protobuf.h>
+
 namespace grpc {
 
 // ProtoReflectionDescriptorDatabase takes a stub of ServerReflection and
diff --git a/test/cpp/util/test_credentials_provider.cc b/test/cpp/util/test_credentials_provider.cc
index 6e68f59e6ac13f54615de2ca240adab6d51117f7..ca15f29795a5435fe25580a997a1a60ad8068f7e 100644
--- a/test/cpp/util/test_credentials_provider.cc
+++ b/test/cpp/util/test_credentials_provider.cc
@@ -37,6 +37,7 @@
 #include <unordered_map>
 
 #include <grpc++/impl/sync.h>
+#include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 
 #include "test/core/end2end/data/ssl_test_data.h"
diff --git a/test/distrib/csharp/run_distrib_test.bat b/test/distrib/csharp/run_distrib_test.bat
index 67bfc58ac8e49c2cd7e52e2287cfab70d35e3240..6cf381142f4b5a8add9d633ea4260c59d044e2e7 100644
--- a/test/distrib/csharp/run_distrib_test.bat
+++ b/test/distrib/csharp/run_distrib_test.bat
@@ -31,12 +31,22 @@
 cd /d %~dp0
 
 @rem extract input artifacts
-powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::ExtractToDirectory('../../../input_artifacts/csharp_nugets.zip', 'TestNugetFeed');"
+powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::ExtractToDirectory('../../../input_artifacts/csharp_nugets_dotnetcli.zip', 'TestNugetFeed');"
 
 update_version.sh auto
 
 set NUGET=C:\nuget\nuget.exe
-%NUGET% restore || goto :error
+
+@rem TODO(jtattermusch): Get rid of this hack. See #8034
+@rem We can't do just "nuget restore" because restoring a .sln solution doesn't work
+@rem with nuget 3.X. On the other hand, we need nuget 2.12+ to be able to restore
+@rem some of the packages (e.g. System.Interactive.Async), but nuget 2.12
+@rem hasn't been officially released.
+@rem Please note that "Restore nuget packages" in VS2013 and VS2015 GUI works as usual.
+
+cd DistribTest || goto :error
+%NUGET% restore -PackagesDirectory ../packages || goto :error
+cd ..
 
 @call build_vs2015.bat DistribTest.sln %MSBUILD_EXTRA_ARGS% || goto :error
 
diff --git a/test/distrib/csharp/run_distrib_test.sh b/test/distrib/csharp/run_distrib_test.sh
index 64e98d800968728bdc641c30f41c8866084fe3f3..0a77c1af4407a16259da7cda77b663a38676aa2e 100755
--- a/test/distrib/csharp/run_distrib_test.sh
+++ b/test/distrib/csharp/run_distrib_test.sh
@@ -32,7 +32,7 @@ set -ex
 
 cd $(dirname $0)
 
-unzip -o "$EXTERNAL_GIT_ROOT/input_artifacts/csharp_nugets.zip" -d TestNugetFeed
+unzip -o "$EXTERNAL_GIT_ROOT/input_artifacts/csharp_nugets_dotnetcli.zip" -d TestNugetFeed
 
 ./update_version.sh auto
 
diff --git a/test/distrib/csharp/run_distrib_test_dotnetcli.sh b/test/distrib/csharp/run_distrib_test_dotnetcli.sh
index f7080be9ad26d2e93d06fb11f77cab0eb02d5fff..493c5049fb8e00a4c63e0d3b0d5afe637b148cbb 100755
--- a/test/distrib/csharp/run_distrib_test_dotnetcli.sh
+++ b/test/distrib/csharp/run_distrib_test_dotnetcli.sh
@@ -32,7 +32,7 @@ set -ex
 
 cd $(dirname $0)
 
-unzip -o "$EXTERNAL_GIT_ROOT/input_artifacts/csharp_nugets.zip" -d TestNugetFeed
+unzip -o "$EXTERNAL_GIT_ROOT/input_artifacts/csharp_nugets_dotnetcli.zip" -d TestNugetFeed
 
 ./update_version.sh auto
 
diff --git a/third_party/nanopb b/third_party/nanopb
index f8ac463766281625ad710900479130c7fcb4d63b..68a86e96481e6bea987df8de47027847b30c325b 160000
--- a/third_party/nanopb
+++ b/third_party/nanopb
@@ -1 +1 @@
-Subproject commit f8ac463766281625ad710900479130c7fcb4d63b
+Subproject commit 68a86e96481e6bea987df8de47027847b30c325b
diff --git a/tools/codegen/core/gen_nano_proto.sh b/tools/codegen/core/gen_nano_proto.sh
index c880fc23a234d4735c64c7a9693f2a101af11943..df107c208f670f90dd4a369236a6cf0427c130c6 100755
--- a/tools/codegen/core/gen_nano_proto.sh
+++ b/tools/codegen/core/gen_nano_proto.sh
@@ -123,7 +123,7 @@ popd
 
 # this should be the same version as the submodule we compile against
 # ideally we'd update this as a template to ensure that
-pip install protobuf==3.0.0b2
+pip install protobuf==3.0.0
 
 pushd "$(dirname $INPUT_PROTO)" > /dev/null
 
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 314a42d989361d154047737d77ad26472ddbcc63..2a56d40c63b6f5daf8ebcb2b5f9feb3874cfce36 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -814,27 +814,23 @@ include/grpc/grpc.h \
 include/grpc/grpc_posix.h \
 include/grpc/grpc_security_constants.h \
 include/grpc/status.h \
-include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
 include/grpc/impl/codegen/compression_types.h \
 include/grpc/impl/codegen/connectivity_state.h \
 include/grpc/impl/codegen/grpc_types.h \
 include/grpc/impl/codegen/propagation_bits.h \
 include/grpc/impl/codegen/status.h \
-include/grpc/impl/codegen/alloc.h \
 include/grpc/impl/codegen/atm.h \
 include/grpc/impl/codegen/atm_gcc_atomic.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
-include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/gpr_types.h \
 include/grpc/impl/codegen/port_platform.h \
 include/grpc/impl/codegen/slice.h \
-include/grpc/impl/codegen/slice_buffer.h \
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 include/grpc++/impl/codegen/async_stream.h \
 include/grpc++/impl/codegen/async_unary_call.h \
 include/grpc++/impl/codegen/call.h \
@@ -858,6 +854,7 @@ include/grpc++/impl/codegen/server_interface.h \
 include/grpc++/impl/codegen/service_type.h \
 include/grpc++/impl/codegen/status.h \
 include/grpc++/impl/codegen/status_code_enum.h \
+include/grpc++/impl/codegen/status_helper.h \
 include/grpc++/impl/codegen/string_ref.h \
 include/grpc++/impl/codegen/stub_options.h \
 include/grpc++/impl/codegen/sync.h \
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index d31581f037f9e58c2eccf40648471f35649557ab..ad4f2f1f00262f1ae51f81c7c49e9a9a2f2ff30f 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -814,27 +814,23 @@ include/grpc/grpc.h \
 include/grpc/grpc_posix.h \
 include/grpc/grpc_security_constants.h \
 include/grpc/status.h \
-include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
 include/grpc/impl/codegen/compression_types.h \
 include/grpc/impl/codegen/connectivity_state.h \
 include/grpc/impl/codegen/grpc_types.h \
 include/grpc/impl/codegen/propagation_bits.h \
 include/grpc/impl/codegen/status.h \
-include/grpc/impl/codegen/alloc.h \
 include/grpc/impl/codegen/atm.h \
 include/grpc/impl/codegen/atm_gcc_atomic.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
-include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/gpr_types.h \
 include/grpc/impl/codegen/port_platform.h \
 include/grpc/impl/codegen/slice.h \
-include/grpc/impl/codegen/slice_buffer.h \
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 include/grpc++/impl/codegen/async_stream.h \
 include/grpc++/impl/codegen/async_unary_call.h \
 include/grpc++/impl/codegen/call.h \
@@ -858,6 +854,7 @@ include/grpc++/impl/codegen/server_interface.h \
 include/grpc++/impl/codegen/service_type.h \
 include/grpc++/impl/codegen/status.h \
 include/grpc++/impl/codegen/status_code_enum.h \
+include/grpc++/impl/codegen/status_helper.h \
 include/grpc++/impl/codegen/string_ref.h \
 include/grpc++/impl/codegen/stub_options.h \
 include/grpc++/impl/codegen/sync.h \
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index 27f878e8ab7f9ed0a12b10e55c46e0f45336eb45..003686cee69c13e84fb995435878c05c4ad6061d 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -767,27 +767,23 @@ include/grpc/grpc.h \
 include/grpc/grpc_posix.h \
 include/grpc/grpc_security_constants.h \
 include/grpc/status.h \
-include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
 include/grpc/impl/codegen/compression_types.h \
 include/grpc/impl/codegen/connectivity_state.h \
 include/grpc/impl/codegen/grpc_types.h \
 include/grpc/impl/codegen/propagation_bits.h \
 include/grpc/impl/codegen/status.h \
-include/grpc/impl/codegen/alloc.h \
 include/grpc/impl/codegen/atm.h \
 include/grpc/impl/codegen/atm_gcc_atomic.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
-include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/gpr_types.h \
 include/grpc/impl/codegen/port_platform.h \
 include/grpc/impl/codegen/slice.h \
-include/grpc/impl/codegen/slice_buffer.h \
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 include/grpc/grpc_security.h \
 include/grpc/census.h \
 include/grpc/support/alloc.h \
@@ -818,20 +814,17 @@ include/grpc/support/tls_gcc.h \
 include/grpc/support/tls_msvc.h \
 include/grpc/support/tls_pthread.h \
 include/grpc/support/useful.h \
-include/grpc/impl/codegen/alloc.h \
 include/grpc/impl/codegen/atm.h \
 include/grpc/impl/codegen/atm_gcc_atomic.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
-include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/gpr_types.h \
 include/grpc/impl/codegen/port_platform.h \
 include/grpc/impl/codegen/slice.h \
-include/grpc/impl/codegen/slice_buffer.h \
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
-include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h
+include/grpc/impl/codegen/sync_windows.h
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index f5a5553283def35fd9343c09635b03f03ada20d9..e2c5ceb69f8e60f5e0ef82badbe92a75f0f550ae 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -767,27 +767,23 @@ include/grpc/grpc.h \
 include/grpc/grpc_posix.h \
 include/grpc/grpc_security_constants.h \
 include/grpc/status.h \
-include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
 include/grpc/impl/codegen/compression_types.h \
 include/grpc/impl/codegen/connectivity_state.h \
 include/grpc/impl/codegen/grpc_types.h \
 include/grpc/impl/codegen/propagation_bits.h \
 include/grpc/impl/codegen/status.h \
-include/grpc/impl/codegen/alloc.h \
 include/grpc/impl/codegen/atm.h \
 include/grpc/impl/codegen/atm_gcc_atomic.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
-include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/gpr_types.h \
 include/grpc/impl/codegen/port_platform.h \
 include/grpc/impl/codegen/slice.h \
-include/grpc/impl/codegen/slice_buffer.h \
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 include/grpc/grpc_security.h \
 include/grpc/census.h \
 src/core/lib/channel/channel_args.h \
@@ -1169,20 +1165,17 @@ include/grpc/support/tls_gcc.h \
 include/grpc/support/tls_msvc.h \
 include/grpc/support/tls_pthread.h \
 include/grpc/support/useful.h \
-include/grpc/impl/codegen/alloc.h \
 include/grpc/impl/codegen/atm.h \
 include/grpc/impl/codegen/atm_gcc_atomic.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
-include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/gpr_types.h \
 include/grpc/impl/codegen/port_platform.h \
 include/grpc/impl/codegen/slice.h \
-include/grpc/impl/codegen/slice_buffer.h \
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 src/core/lib/profiling/timers.h \
 src/core/lib/support/backoff.h \
 src/core/lib/support/block_annotate.h \
diff --git a/tools/run_tests/build_artifact_protoc.bat b/tools/run_tests/build_artifact_protoc.bat
index e1dc032188f130e2cf3fee718ed511df69b73802..3246a903d0bf7e9fe9372bdbfc9775bab5e0b71f 100644
--- a/tools/run_tests/build_artifact_protoc.bat
+++ b/tools/run_tests/build_artifact_protoc.bat
@@ -32,12 +32,8 @@ mkdir artifacts
 setlocal
 cd third_party/protobuf
 
-powershell -Command "Invoke-WebRequest https://googlemock.googlecode.com/files/gmock-1.7.0.zip -OutFile gmock.zip"
-powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::ExtractToDirectory('gmock.zip', '.');"
-rename gmock-1.7.0 gmock
-
 cd cmake
-cmake -G "%generator%" || goto :error
+cmake -G "%generator%" -Dprotobuf_BUILD_TESTS=OFF || goto :error
 endlocal
 
 call vsprojects/build_plugins.bat || goto :error
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index e81b34c48eb06ad9c8483795802ea82e6cc5880f..99b5596a4b50bab94f879214d2352182a6d77649 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -70,7 +70,7 @@ BIG_GENERIC_PAYLOAD = {
 # non-ping-pong tests (since we can only specify per-channel numbers, the
 # actual target will be slightly higher)
 OUTSTANDING_REQUESTS={
-    'async': 10000,
+    'async': 6400,
     'sync': 1000
 }
 
diff --git a/tools/run_tests/pre_build_csharp.bat b/tools/run_tests/pre_build_csharp.bat
index 580d5638fda3ac1f354a517e9dc3c33ce6f6ce4e..f15979a96bef3eed6fc89a368a36dd7e011688fe 100644
--- a/tools/run_tests/pre_build_csharp.bat
+++ b/tools/run_tests/pre_build_csharp.bat
@@ -38,9 +38,10 @@ cd /d %~dp0\..\..
 set NUGET=C:\nuget\nuget.exe
 
 if exist %NUGET% (
+  @rem TODO(jtattermusch): Get rid of this hack. See #8034
   @rem Restore Grpc packages by packages since Nuget client 3.4.4 doesnt support restore
   @rem by solution
-  @rem Moving into each directory to let the restores work with both nuget 3.4 and 2.8
+  @rem Moving into each directory to let the restores work based on per-project packages.config files
   %NUGET% restore vsprojects/grpc_csharp_ext.sln || goto :error
 
   cd src/csharp
diff --git a/tools/run_tests/pre_build_csharp.sh b/tools/run_tests/pre_build_csharp.sh
index 0fd3b92a9513507898e840c0e5f19126413465d5..ee678ddce5f5c6858443f73f493ab9e493b9d6c0 100755
--- a/tools/run_tests/pre_build_csharp.sh
+++ b/tools/run_tests/pre_build_csharp.sh
@@ -37,9 +37,10 @@ root=`pwd`
 
 if [ -x "$(command -v nuget)" ]
 then
+  # TODO(jtattermusch): Get rid of this hack. See #8034
   # Restoring Nuget packages by packages rather than by solution because of
   # inability to restore by solution with Nuget client 3.4.4
-  # Moving into each directory to let the restores work with nuget 3.4 and 2.8
+  # Moving into each directory to let the restores work based on per-project packages.config files
   cd Grpc.Auth
   nuget restore -PackagesDirectory ../packages
   cd ..
diff --git a/tools/run_tests/run_build_statistics.py b/tools/run_tests/run_build_statistics.py
index df155f8e80e1d1327a66cee72551e809a14f6728..89aad2a39919fb46c0843227b44dd79d34d13cc6 100755
--- a/tools/run_tests/run_build_statistics.py
+++ b/tools/run_tests/run_build_statistics.py
@@ -64,7 +64,7 @@ _KNOWN_ERRORS = [
     'Failed to build workspace Tests with scheme AllTests',
     'Build timed out',
     'FATAL: Unable to produce a script file',
-    'FAILED: build_docker_c++',
+    'FAILED: build_docker_c\+\+',
     'cannot find package \"cloud.google.com/go/compute/metadata\"',
     'LLVM ERROR: IO failure on output stream.',
     'MSBUILD : error MSB1009: Project file does not exist.',
@@ -72,6 +72,7 @@ _KNOWN_ERRORS = [
     'Failed to fetch from http://github.com/grpc/grpc.git',
     ('hudson.remoting.RemotingSystemException: java.io.IOException: '
      'Backing channel is disconnected.'),
+    'hudson.remoting.ChannelClosedException',
     'FAILED: bins/tsan/qps_openloop_test GRPC_POLL_STRATEGY=epoll',
     'FAILED: bins/tsan/qps_openloop_test GRPC_POLL_STRATEGY=legacy',
     'FAILED: bins/tsan/qps_openloop_test GRPC_POLL_STRATEGY=poll',
diff --git a/tools/run_tests/run_performance_tests.py b/tools/run_tests/run_performance_tests.py
index 25f5d4639f37aac23fd062d144e38104cb3feace..b8e16af23157a6dc7272f01f14c81c5bc5816b63 100755
--- a/tools/run_tests/run_performance_tests.py
+++ b/tools/run_tests/run_performance_tests.py
@@ -33,11 +33,13 @@
 from __future__ import print_function
 
 import argparse
+import collections
 import itertools
 import jobset
 import json
 import multiprocessing
 import os
+import performance.scenario_config as scenario_config
 import pipes
 import re
 import subprocess
@@ -46,7 +48,6 @@ import tempfile
 import time
 import traceback
 import uuid
-import performance.scenario_config as scenario_config
 
 
 _ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
@@ -63,14 +64,19 @@ class QpsWorkerJob:
     self._spec = spec
     self.language = language
     self.host_and_port = host_and_port
-    self._job = jobset.Job(spec, newline_on_success=True, travis=True, add_env={})
+    self._job = None
+
+  def start(self):
+    self._job = jobset.Job(self._spec, newline_on_success=True, travis=True, add_env={})
 
   def is_running(self):
     """Polls a job and returns True if given job is still running."""
-    return self._job.state() == jobset._RUNNING
+    return self._job and self._job.state() == jobset._RUNNING
 
   def kill(self):
-    return self._job.kill()
+    if self._job:
+      self._job.kill()
+      self._job = None
 
 
 def create_qpsworker_job(language, shortname=None,
@@ -119,7 +125,7 @@ def create_scenario_jobspec(scenario_json, workers, remote_host=None,
 def create_quit_jobspec(workers, remote_host=None):
   """Runs quit using QPS driver."""
   # setting QPS_WORKERS env variable here makes sure it works with SSH too.
-  cmd = 'QPS_WORKERS="%s" bins/opt/qps_json_driver --quit' % ','.join(workers)
+  cmd = 'QPS_WORKERS="%s" bins/opt/qps_json_driver --quit' % ','.join(w.host_and_port for w in workers)
   if remote_host:
     user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, remote_host)
     cmd = 'ssh %s "cd ~/performance_workspace/grpc/ && "%s' % (user_at_host, pipes.quote(cmd))
@@ -253,8 +259,8 @@ def build_on_remote_hosts(hosts, languages=scenario_config.LANGUAGES.keys(), bui
     sys.exit(1)
 
 
-def start_qpsworkers(languages, worker_hosts):
-  """Starts QPS workers as background jobs."""
+def create_qpsworkers(languages, worker_hosts):
+  """Creates QPS workers (but does not start them)."""
   if not worker_hosts:
     # run two workers locally (for each language)
     workers=[(None, 10000), (None, 10010)]
@@ -274,6 +280,9 @@ def start_qpsworkers(languages, worker_hosts):
           for worker_idx, worker in enumerate(workers)]
 
 
+Scenario = collections.namedtuple('Scenario', 'jobspec workers')
+
+
 def create_scenarios(languages, workers_by_lang, remote_host=None, regex='.*',
                      category='all', bq_result_table=None,
                      netperf=False, netperf_hosts=[]):
@@ -282,6 +291,7 @@ def create_scenarios(languages, workers_by_lang, remote_host=None, regex='.*',
                  for workers in workers_by_lang.values()
                  for worker in workers]
   scenarios = []
+  _NO_WORKERS = []
 
   if netperf:
     if not netperf_hosts:
@@ -293,16 +303,18 @@ def create_scenarios(languages, workers_by_lang, remote_host=None, regex='.*',
     else:
       netperf_server=netperf_hosts[0]
       netperf_client=netperf_hosts[1]
-    scenarios.append(create_netperf_jobspec(server_host=netperf_server,
-                                            client_host=netperf_client,
-                                            bq_result_table=bq_result_table))
+    scenarios.append(Scenario(
+        create_netperf_jobspec(server_host=netperf_server,
+                               client_host=netperf_client,
+                               bq_result_table=bq_result_table),
+        _NO_WORKERS))
 
   for language in languages:
     for scenario_json in language.scenarios():
       if re.search(args.regex, scenario_json['name']):
         categories = scenario_json.get('CATEGORIES', [])
         if category in categories or (category == 'all' and categories != ['sweep']):
-          workers = workers_by_lang[str(language)]
+          workers = workers_by_lang[str(language)][:]
           # 'SERVER_LANGUAGE' is an indicator for this script to pick
           # a server in different language.
           custom_server_lang = scenario_json.get('SERVER_LANGUAGE', None)
@@ -330,14 +342,14 @@ def create_scenarios(languages, workers_by_lang, remote_host=None, regex='.*',
               # replace all client workers by workers of a different language,
               # leave num_server workers as they are server workers.
               workers[idx] = workers_by_lang[custom_client_lang][idx]
-          scenario = create_scenario_jobspec(scenario_json,
-                                             workers,
-                                             remote_host=remote_host,
-                                             bq_result_table=bq_result_table)
+          scenario = Scenario(
+              create_scenario_jobspec(scenario_json,
+                                      [w.host_and_port for w in workers],
+                                      remote_host=remote_host,
+                                      bq_result_table=bq_result_table),
+              workers)
           scenarios.append(scenario)
 
-  # the very last scenario requests shutting down the workers.
-  scenarios.append(create_quit_jobspec(all_workers, remote_host=remote_host))
   return scenarios
 
 
@@ -411,42 +423,31 @@ if not args.remote_driver_host:
   build_local = True
 build_on_remote_hosts(remote_hosts, languages=[str(l) for l in languages], build_local=build_local)
 
-qpsworker_jobs = start_qpsworkers(languages, args.remote_worker_host)
-
-# TODO(jtattermusch): see https://github.com/grpc/grpc/issues/6174
-time.sleep(5)
+qpsworker_jobs = create_qpsworkers(languages, args.remote_worker_host)
 
 # get list of worker addresses for each language.
-worker_addresses = dict([(str(language), []) for language in languages])
+workers_by_lang = dict([(str(language), []) for language in languages])
 for job in qpsworker_jobs:
-  worker_addresses[str(job.language)].append(job.host_and_port)
-
-try:
-  scenarios = create_scenarios(languages,
-                               workers_by_lang=worker_addresses,
-                               remote_host=args.remote_driver_host,
-                               regex=args.regex,
-                               category=args.category,
-                               bq_result_table=args.bq_result_table,
-                               netperf=args.netperf,
-                               netperf_hosts=args.remote_worker_host)
-
-  if not scenarios:
-    raise Exception('No scenarios to run')
-
-  jobset.message('START', 'Running scenarios.', do_newline=True)
-  num_failures, _ = jobset.run(
-      scenarios, newline_on_success=True, maxjobs=1)
-  if num_failures == 0:
-    jobset.message('SUCCESS',
-                   'All scenarios finished successfully.',
-                   do_newline=True)
-  else:
-    jobset.message('FAILED', 'Some of the scenarios failed.',
-                   do_newline=True)
-    sys.exit(1)
-except:
-  traceback.print_exc()
-  raise
-finally:
-  finish_qps_workers(qpsworker_jobs)
+  workers_by_lang[str(job.language)].append(job)
+
+scenarios = create_scenarios(languages,
+                           workers_by_lang=workers_by_lang,
+                           remote_host=args.remote_driver_host,
+                           regex=args.regex,
+                           category=args.category,
+                           bq_result_table=args.bq_result_table,
+                           netperf=args.netperf,
+                           netperf_hosts=args.remote_worker_host)
+
+if not scenarios:
+  raise Exception('No scenarios to run')
+
+for scenario in scenarios:
+  try:
+    for worker in scenario.workers:
+      worker.start()
+    jobset.run([scenario.jobspec,
+                create_quit_jobspec(scenario.workers, remote_host=args.remote_driver_host)],
+               newline_on_success=True, maxjobs=1)
+  finally:
+    finish_qps_workers(scenario.workers)
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index 5562d330fd5c43864806b2351ce77706277ff5c7..f1d9d5a57fb25550dc4a318c7baa222557c44246 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -44,7 +44,7 @@ cat << EOF | awk '{ print $1 }' | sort > $want_submodules
  c880e42ba1c8032d4cdde2aba0541d8a9d9fa2e9 third_party/boringssl (version_for_cocoapods_2.0-100-gc880e42)
  05b155ff59114735ec8cd089f669c4c3d8f59029 third_party/gflags (v2.1.0-45-g05b155f)
  c99458533a9b4c743ed51537e25989ea55944908 third_party/googletest (release-1.7.0)
- f8ac463766281625ad710900479130c7fcb4d63b third_party/nanopb (nanopb-0.3.4-29-gf8ac463)
+ 68a86e96481e6bea987df8de47027847b30c325b third_party/nanopb (nanopb-0.3.6-6-g68a86e9)
  bba446bbf2ac7b0b9923d4eb07d5acd0665a8cf0 third_party/protobuf (v3.0.0-beta-4-160-gbba446b)
  50893291621658f355bc5b4d450a8d06a563053d third_party/zlib (v1.2.8)
  bcad91771b7f0bff28a1cac1981d7ef2b9bcef3c third_party/thrift
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 5b4c65723da7be4c2208ed97876934c7331155d0..1929297ef906fc648eed1d994232a6abbe850a05 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5840,38 +5840,32 @@
   {
     "deps": [], 
     "headers": [
-      "include/grpc/impl/codegen/alloc.h", 
       "include/grpc/impl/codegen/atm.h", 
       "include/grpc/impl/codegen/atm_gcc_atomic.h", 
       "include/grpc/impl/codegen/atm_gcc_sync.h", 
       "include/grpc/impl/codegen/atm_windows.h", 
-      "include/grpc/impl/codegen/log.h", 
+      "include/grpc/impl/codegen/gpr_types.h", 
       "include/grpc/impl/codegen/port_platform.h", 
       "include/grpc/impl/codegen/slice.h", 
-      "include/grpc/impl/codegen/slice_buffer.h", 
       "include/grpc/impl/codegen/sync.h", 
       "include/grpc/impl/codegen/sync_generic.h", 
       "include/grpc/impl/codegen/sync_posix.h", 
-      "include/grpc/impl/codegen/sync_windows.h", 
-      "include/grpc/impl/codegen/time.h"
+      "include/grpc/impl/codegen/sync_windows.h"
     ], 
     "language": "c", 
     "name": "gpr_codegen", 
     "src": [
-      "include/grpc/impl/codegen/alloc.h", 
       "include/grpc/impl/codegen/atm.h", 
       "include/grpc/impl/codegen/atm_gcc_atomic.h", 
       "include/grpc/impl/codegen/atm_gcc_sync.h", 
       "include/grpc/impl/codegen/atm_windows.h", 
-      "include/grpc/impl/codegen/log.h", 
+      "include/grpc/impl/codegen/gpr_types.h", 
       "include/grpc/impl/codegen/port_platform.h", 
       "include/grpc/impl/codegen/slice.h", 
-      "include/grpc/impl/codegen/slice_buffer.h", 
       "include/grpc/impl/codegen/sync.h", 
       "include/grpc/impl/codegen/sync_generic.h", 
       "include/grpc/impl/codegen/sync_posix.h", 
-      "include/grpc/impl/codegen/sync_windows.h", 
-      "include/grpc/impl/codegen/time.h"
+      "include/grpc/impl/codegen/sync_windows.h"
     ], 
     "third_party": false, 
     "type": "filegroup"
@@ -6223,7 +6217,6 @@
       "gpr_codegen"
     ], 
     "headers": [
-      "include/grpc/impl/codegen/byte_buffer.h", 
       "include/grpc/impl/codegen/byte_buffer_reader.h", 
       "include/grpc/impl/codegen/compression_types.h", 
       "include/grpc/impl/codegen/connectivity_state.h", 
@@ -6234,7 +6227,6 @@
     "language": "c", 
     "name": "grpc_codegen", 
     "src": [
-      "include/grpc/impl/codegen/byte_buffer.h", 
       "include/grpc/impl/codegen/byte_buffer_reader.h", 
       "include/grpc/impl/codegen/compression_types.h", 
       "include/grpc/impl/codegen/connectivity_state.h", 
@@ -6871,6 +6863,7 @@
       "include/grpc++/impl/codegen/service_type.h", 
       "include/grpc++/impl/codegen/status.h", 
       "include/grpc++/impl/codegen/status_code_enum.h", 
+      "include/grpc++/impl/codegen/status_helper.h", 
       "include/grpc++/impl/codegen/string_ref.h", 
       "include/grpc++/impl/codegen/stub_options.h", 
       "include/grpc++/impl/codegen/sync.h", 
@@ -6905,6 +6898,7 @@
       "include/grpc++/impl/codegen/service_type.h", 
       "include/grpc++/impl/codegen/status.h", 
       "include/grpc++/impl/codegen/status_code_enum.h", 
+      "include/grpc++/impl/codegen/status_helper.h", 
       "include/grpc++/impl/codegen/string_ref.h", 
       "include/grpc++/impl/codegen/stub_options.h", 
       "include/grpc++/impl/codegen/sync.h", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 51e1dff96e44e024f15137c18401ee281da9df19..cbc8f584f4c694edc5056d04183024fb2195ad3d 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -29598,7 +29598,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 157, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -29625,7 +29625,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_qps_one_server_core_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 157, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_qps_one_server_core_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30003,7 +30003,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 157, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30030,7 +30030,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 157, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30057,7 +30057,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_1_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 10000, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_1_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 6400, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30084,7 +30084,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_3_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 3, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 3334, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_3_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 3, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 2134, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30111,7 +30111,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_10_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 10, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1000, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_10_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 10, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 640, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30138,7 +30138,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_31_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 31, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 323, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_31_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 31, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 207, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30165,7 +30165,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_100_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 100, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_100_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 100, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 64, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30192,7 +30192,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_316_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 316, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 32, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_316_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 316, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 21, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30219,7 +30219,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_1000_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1000, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 10, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure_1000_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1000, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 7, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30273,7 +30273,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 157, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30300,7 +30300,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_qps_one_server_core_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 157, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_qps_one_server_core_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30678,7 +30678,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 157, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30705,7 +30705,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 157, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30732,7 +30732,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_1_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 10000, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_1_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 6400, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30759,7 +30759,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_3_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 3, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 3334, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_3_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 3, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 2134, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30786,7 +30786,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_10_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 10, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1000, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_10_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 10, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 640, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30813,7 +30813,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_31_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 31, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 323, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_31_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 31, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 207, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30840,7 +30840,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_100_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 100, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_100_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 100, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 64, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30867,7 +30867,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_316_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 316, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 32, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_316_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 316, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 21, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -30894,7 +30894,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_1000_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1000, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 10, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure_1000_channels\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1000, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 7, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
diff --git a/vsprojects/vcxproj/gpr/gpr.vcxproj b/vsprojects/vcxproj/gpr/gpr.vcxproj
index 519b5d92502ce24d0079cb1a5e7954c3232446f7..a77c16da9bda29119b8a5294564d15699e1f5b86 100644
--- a/vsprojects/vcxproj/gpr/gpr.vcxproj
+++ b/vsprojects/vcxproj/gpr/gpr.vcxproj
@@ -175,20 +175,17 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\support\tls_msvc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\support\tls_pthread.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\support\useful.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\profiling\timers.h" />
diff --git a/vsprojects/vcxproj/gpr/gpr.vcxproj.filters b/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
index 9eac1ec5195ce5a9dfccb9d872f461f36b1cdfac..f6ba5563ceb5861ff02f21ab84b77cfc4d254db1 100644
--- a/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
+++ b/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
@@ -225,9 +225,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\support\useful.h">
       <Filter>include\grpc\support</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -240,7 +237,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -249,9 +246,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -264,9 +258,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\profiling\timers.h">
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
index 6a1cb422d2f472170b456f76840428b3414a6ee4..2cff029ef57a16e7a10379c46216aeb4e186fd22 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
@@ -312,27 +312,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security_constants.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h" />
@@ -356,6 +352,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
index 637fb33c48edce612a71300e6489b8e6f2855c66..482ef1e49e15291285112264f5bc662ab309ca2b 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
@@ -537,9 +537,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -558,9 +555,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -573,7 +567,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -582,9 +576,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -597,9 +588,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
@@ -669,6 +657,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj b/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj
index 7c3e63b2084b699532760291560b7b3e0085e2e0..230128180a3c937d04355b75c22a9b3631f4d18b 100644
--- a/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj
+++ b/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj
@@ -174,6 +174,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
@@ -181,27 +182,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj.filters b/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj.filters
index d9cd49cc30658cf4760c253fa111d022cdc70a63..540e1c6e3640a9f3caec19163d0afc6fc9894962 100644
--- a/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj.filters
@@ -96,6 +96,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
@@ -117,9 +120,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -138,9 +138,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -153,7 +150,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -162,9 +159,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -177,9 +171,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
index c2c7d00a6d974e0a03939d742fbb4839bf01f94c..17e919955439a70ded7c90790a8fab2ea6cb2b08 100644
--- a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
@@ -170,6 +170,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
@@ -177,27 +178,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\thrift_serializer.h" />
diff --git a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
index 9b8c8ddfadaa54e7e73751cb3915f23403a9af4d..25a1752479c49dcf2dbb5ad1099acbb678d1bf76 100644
--- a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
@@ -102,6 +102,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
@@ -123,9 +126,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -144,9 +144,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -159,7 +156,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -168,9 +165,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -183,9 +177,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
index 0081b173388394e52ee0ebd9311fbefff17149fa..def1a9cc516d9966cd859242a66eb730d54d9866 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
@@ -312,27 +312,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security_constants.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h" />
@@ -356,6 +352,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
index 4a1ba243dc9af5154b5bf41f942efeb46d070264..12a560630f542c896f7f98525d6516d4f37fb433 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
@@ -522,9 +522,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -543,9 +540,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -558,7 +552,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -567,9 +561,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -582,9 +573,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
@@ -654,6 +642,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 26d77de258b0690b625419099c80970a9a110a96..9f9291cbbfecfc67cfb79042f1d9713ca527fe8d 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -274,27 +274,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security_constants.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\census.h" />
   </ItemGroup>
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 2d17c6a655b92bb3ca7b2d357b16eaeb2f567263..f281dc95c1784aecce7d24d11aaa784bdffce331 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -597,9 +597,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -618,9 +615,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -633,7 +627,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -642,9 +636,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -657,9 +648,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
index 919bcb0e69f64bf9bd25693d4947d92f86f2de3d..6278dca4a176ee2e2c06354017d340b2bdf53061 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
@@ -154,27 +154,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security_constants.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\test\core\end2end\data\ssl_test_data.h" />
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
index aff6aeb0d7a1577e87af8d0af5b4c115b11df74f..e3c82c5de10b1f7f35632e4a7b0ff7ca7aff15a5 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
@@ -345,9 +345,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -366,9 +363,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -381,7 +375,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -390,9 +384,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -405,9 +396,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\test\core\end2end\data\ssl_test_data.h">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index cc9a4ce824e8bfa8262081c4c17f377c97b7396a..8f0c085297cac2c44ffd523f753612643967b0c8 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -265,27 +265,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security_constants.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\census.h" />
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index a083f4eb80b0bdd7b9d047aa15b9bc0a9ec98ac7..ac340a5c3c4705058b5e80c61ad1297e81d02327 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -510,9 +510,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -531,9 +528,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -546,7 +540,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -555,9 +549,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -570,9 +561,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\census.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj b/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj
index e608f7ed3a3de3b69bdb9d1edd263dae93192174..2d75735728be0f866b97dfaa057a06077baee6fc 100644
--- a/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj
+++ b/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj
@@ -183,6 +183,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
@@ -190,27 +191,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\testing\control.pb.cc">
diff --git a/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj.filters b/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj.filters
index 8fc8f3901b314756ee186ef7f2473d5840af20b9..dda79675fbdf5d371133dd38f96871e259855ef5 100644
--- a/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj.filters
+++ b/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj.filters
@@ -90,6 +90,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
@@ -111,9 +114,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -132,9 +132,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -147,7 +144,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -156,9 +153,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -171,9 +165,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj b/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj
index 3331c618473d06c462b410644708b3916163ef97..270c2a3a0626930f6b796e72741c6f56f9d303a8 100644
--- a/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj
+++ b/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj
@@ -183,6 +183,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
@@ -190,27 +191,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\testing\control.pb.cc">
diff --git a/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj.filters b/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj.filters
index a8ff11531777544233b1b16e3f517c3d353e18fe..dc5e321649beef43469af01198b4a19ec39aa761 100644
--- a/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj.filters
+++ b/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj.filters
@@ -93,6 +93,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
@@ -114,9 +117,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -135,9 +135,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -150,7 +147,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -159,9 +156,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -174,9 +168,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/grpc_tool_test/grpc_tool_test.vcxproj b/vsprojects/vcxproj/test/grpc_tool_test/grpc_tool_test.vcxproj
index c6f65aa30b86a412b9c29cc92b3463a44dcbbbb4..bdf310db1bd4ae8e9056234b606e36f08639cecd 100644
--- a/vsprojects/vcxproj/test/grpc_tool_test/grpc_tool_test.vcxproj
+++ b/vsprojects/vcxproj/test/grpc_tool_test/grpc_tool_test.vcxproj
@@ -184,6 +184,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
@@ -191,27 +192,23 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/grpc_tool_test/grpc_tool_test.vcxproj.filters b/vsprojects/vcxproj/test/grpc_tool_test/grpc_tool_test.vcxproj.filters
index 731eb2e6ffb3b36c4b4d4def656bc750fef5885a..cd341e9eb1ffc3442e824757b7f4ddf04d72a94b 100644
--- a/vsprojects/vcxproj/test/grpc_tool_test/grpc_tool_test.vcxproj.filters
+++ b/vsprojects/vcxproj/test/grpc_tool_test/grpc_tool_test.vcxproj.filters
@@ -87,6 +87,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_helper.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
@@ -108,9 +111,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -129,9 +129,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -144,7 +141,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\gpr_types.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
@@ -153,9 +150,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -168,9 +162,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>