api watch unblock func kills only its own channel

src/ruby/end2end/multiple_killed_watching_threads_driver.rb

+#!/usr/bin/env ruby
+
+# 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.
+
+require_relative './end2end_common'
+
+Thread.abort_on_exception = true
+
+include GRPC::Core::ConnectivityStates
+
+def watch_state(ch)
+  thd = Thread.new do
+    state = ch.connectivity_state(false)
+    fail "non-idle state: #{state}" unless state == IDLE
+    ch.watch_connectivity_state(IDLE, Time.now + 360)
+  end
+  sleep 0.1
+  thd.kill
+end
+
+def main
+  10.times do
+    ch = GRPC::Core::Channel.new('dummy_host',
+                                 nil, :this_channel_is_insecure)
+    watch_state(ch)
+  end
+end
+
+main

src/ruby/ext/grpc/rb_channel.c

@@ -366,6 +366,16 @@ static void *wait_for_watch_state_op_complete_without_gvl(void *arg) {
   return success;
 }
 
+static void wait_for_watch_state_op_complete_unblocking_func(void *arg) {
+  bg_watched_channel *bg = (bg_watched_channel *)arg;
+  gpr_mu_lock(&global_connection_polling_mu);
+  if (!bg->channel_destroyed) {
+    grpc_channel_destroy(bg->channel);
+    bg->channel_destroyed = 1;
+  }
+  gpr_mu_unlock(&global_connection_polling_mu);
+}
+
 /* Wait until the channel's connectivity state becomes different from
  * "last_state", or "deadline" expires.
  * Returns true if the the channel's connectivity state becomes
@@ -400,7 +410,7 @@ static VALUE grpc_rb_channel_watch_connectivity_state(VALUE self,
 
   op_success = rb_thread_call_without_gvl(
       wait_for_watch_state_op_complete_without_gvl, &stack,
-      run_poll_channels_loop_unblocking_func, NULL);
+      wait_for_watch_state_op_complete_unblocking_func, wrapper->bg_wrapped);
 
   return op_success ? Qtrue : Qfalse;
 }
@@ -577,11 +587,7 @@ static void grpc_rb_channel_try_register_connection_polling(
     return;
   }
   GPR_ASSERT(bg->refcount == 1);
-  if (bg->channel_destroyed) {
-    GPR_ASSERT(abort_channel_polling);
-    return;
-  }
-  if (abort_channel_polling) {
+  if (bg->channel_destroyed || abort_channel_polling) {
     return;
   }
 

tools/run_tests/helper_scripts/run_ruby_end2end_tests.sh

@@ -41,4 +41,5 @@ ruby src/ruby/end2end/sig_int_during_channel_watch_driver.rb || EXIT_CODE=1
 ruby src/ruby/end2end/killed_client_thread_driver.rb || EXIT_CODE=1
 ruby src/ruby/end2end/forking_client_driver.rb || EXIT_CODE=1
 ruby src/ruby/end2end/grpc_class_init_driver.rb || EXIT_CODE=1
+ruby src/ruby/end2end/multiple_killed_watching_threads_driver.rb || EXIT_CODE=1
 exit $EXIT_CODE