Async end2end test passes

include/grpc++/impl/codegen/async_unary_call.h

@@ -68,10 +68,9 @@ class ClientAsyncResponseReader final
                                            ClientContext* context,
                                            const W& request) {
     Call call = channel->CreateCall(method, context, cq);
-    ClientAsyncResponseReader* reader = static_cast<ClientAsyncResponseReader*>(
-        grpc_call_arena_alloc(call.call(), sizeof(*reader)));
-    new (&reader->call_) Call(std::move(call));
-    reader->context_ = context;
+    ClientAsyncResponseReader* reader =
+        new (grpc_call_arena_alloc(call.call(), sizeof(*reader)))
+            ClientAsyncResponseReader(call, context);
 
     reader->init_buf_.SendInitialMetadata(context->send_initial_metadata_,
                                           context->initial_metadata_flags());
@@ -107,11 +106,15 @@ class ClientAsyncResponseReader final
   }
 
  private:
-  ClientContext* context_;
+  ClientContext* const context_;
   Call call_;
 
+  ClientAsyncResponseReader(Call call, ClientContext* context)
+      : context_(context), call_(call) {}
+
   // disable operator new
   static void* operator new(std::size_t size);
+  static void* operator new(std::size_t size, void* p) { return p; };
 
   SneakyCallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
                   CallOpClientSendClose>

include/grpc++/impl/codegen/call.h

@@ -570,7 +570,7 @@ class CallOpSetInterface : public CompletionQueueTag {
  public:
   /// Fills in grpc_op, starting from ops[*nops] and moving
   /// upwards.
-  virtual void FillOps(grpc_op* ops, size_t* nops) = 0;
+  virtual void FillOps(grpc_call* call, grpc_op* ops, size_t* nops) = 0;
 };
 
 /// Primary implementaiton of CallOpSetInterface.
@@ -598,10 +598,11 @@ class CallOpSet : public CallOpSetInterface,
     this->Op4::AddOp(ops, nops);
     this->Op5::AddOp(ops, nops);
     this->Op6::AddOp(ops, nops);
-    grpc_call_ref(call);
+    g_core_codegen_interface->grpc_call_ref(call);
+    call_ = call;
   }
 
-  bool FinalizeResult(grpc_call* call, void** tag, bool* status) override {
+  bool FinalizeResult(void** tag, bool* status) override {
     this->Op1::FinishOp(status);
     this->Op2::FinishOp(status);
     this->Op3::FinishOp(status);
@@ -609,7 +610,7 @@ class CallOpSet : public CallOpSetInterface,
     this->Op5::FinishOp(status);
     this->Op6::FinishOp(status);
     *tag = return_tag_;
-    grpc_call_unref(call);
+    g_core_codegen_interface->grpc_call_unref(call_);
     return true;
   }
 
@@ -617,6 +618,7 @@ class CallOpSet : public CallOpSetInterface,
 
  private:
   void* return_tag_;
+  grpc_call* call_;
 };
 
 /// A CallOpSet that does not post completions to the completion queue.

include/grpc++/impl/codegen/core_codegen.h

@@ -64,6 +64,9 @@ class CoreCodegen : public CoreCodegenInterface {
   void gpr_cv_signal(gpr_cv* cv) override;
   void gpr_cv_broadcast(gpr_cv* cv) override;
 
+  void grpc_call_ref(grpc_call* call) override;
+  void grpc_call_unref(grpc_call* call) override;
+
   void grpc_byte_buffer_destroy(grpc_byte_buffer* bb) override;
 
   int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,

include/grpc++/impl/codegen/core_codegen_interface.h

@@ -94,6 +94,9 @@ class CoreCodegenInterface {
   virtual grpc_byte_buffer* grpc_raw_byte_buffer_create(grpc_slice* slice,
                                                         size_t nslices) = 0;
 
+  virtual void grpc_call_ref(grpc_call* call) = 0;
+  virtual void grpc_call_unref(grpc_call* call) = 0;
+
   virtual grpc_slice grpc_slice_malloc(size_t length) = 0;
   virtual void grpc_slice_unref(grpc_slice slice) = 0;
   virtual grpc_slice grpc_slice_split_tail(grpc_slice* s, size_t split) = 0;

src/cpp/client/channel_cc.cc

@@ -131,7 +131,7 @@ void Channel::PerformOpsOnCall(CallOpSetInterface* ops, Call* call) {
   static const size_t MAX_OPS = 8;
   size_t nops = 0;
   grpc_op cops[MAX_OPS];
-  ops->FillOps(cops, &nops);
+  ops->FillOps(call->call(), cops, &nops);
   GPR_ASSERT(GRPC_CALL_OK ==
              grpc_call_start_batch(call->call(), cops, nops, ops, nullptr));
 }

src/cpp/common/core_codegen.cc

@@ -91,6 +91,9 @@ void CoreCodegen::grpc_byte_buffer_destroy(grpc_byte_buffer* bb) {
   ::grpc_byte_buffer_destroy(bb);
 }
 
+void CoreCodegen::grpc_call_ref(grpc_call* call) { ::grpc_call_ref(call); }
+void CoreCodegen::grpc_call_unref(grpc_call* call) { ::grpc_call_unref(call); }
+
 int CoreCodegen::grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,
                                               grpc_byte_buffer* buffer) {
   return ::grpc_byte_buffer_reader_init(reader, buffer);

src/cpp/server/server_cc.cc

@@ -591,7 +591,7 @@ void Server::PerformOpsOnCall(CallOpSetInterface* ops, Call* call) {
   static const size_t MAX_OPS = 8;
   size_t nops = 0;
   grpc_op cops[MAX_OPS];
-  ops->FillOps(cops, &nops);
+  ops->FillOps(call->call(), cops, &nops);
   auto result = grpc_call_start_batch(call->call(), cops, nops, ops, nullptr);
   GPR_ASSERT(GRPC_CALL_OK == result);
 }

src/cpp/server/server_context.cc

@@ -62,7 +62,7 @@ class ServerContext::CompletionOp final : public CallOpSetInterface {
         finalized_(false),
         cancelled_(0) {}
 
-  void FillOps(grpc_op* ops, size_t* nops) override;
+  void FillOps(grpc_call* call, grpc_op* ops, size_t* nops) override;
   bool FinalizeResult(void** tag, bool* status) override;
 
   bool CheckCancelled(CompletionQueue* cq) {
@@ -100,7 +100,8 @@ void ServerContext::CompletionOp::Unref() {
   }
 }
 
-void ServerContext::CompletionOp::FillOps(grpc_op* ops, size_t* nops) {
+void ServerContext::CompletionOp::FillOps(grpc_call* call, grpc_op* ops,
+                                          size_t* nops) {
   ops->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   ops->data.recv_close_on_server.cancelled = &cancelled_;
   ops->flags = 0;