More logging for pause tests

runtime/vm/isolate.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/isolate.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "vm/code_observers.h"
@@ skipping 27 matching lines @@
 #include "vm/thread_interrupter.h"
 #include "vm/thread_registry.h"
 #include "vm/timeline.h"
 #include "vm/timer.h"
 #include "vm/visitor.h"
 
 
 namespace dart {
 
 DECLARE_FLAG(bool, print_metrics);
+DECLARE_FLAG(bool, trace_service);
 
 DEFINE_FLAG(bool, trace_isolates, false,
             "Trace isolate creation and shut down.");
 DEFINE_FLAG(bool, pause_isolates_on_start, false,
             "Pause isolates before starting.");
 DEFINE_FLAG(bool, pause_isolates_on_exit, false,
             "Pause isolates exiting.");
 DEFINE_FLAG(bool, break_at_isolate_spawn, false,
             "Insert a one-time breakpoint at the entrypoint for all spawned "
             "isolates");
@@ skipping 438 matching lines @@
 }
 
 
 void IsolateMessageHandler::NotifyPauseOnStart() {
   if (Service::debug_stream.enabled()) {
     StartIsolateScope start_isolate(isolate());
     StackZone zone(I);
     HandleScope handle_scope(I);
     ServiceEvent pause_event(isolate(), ServiceEvent::kPauseStart);
     Service::HandleEvent(&pause_event);
+  } else  if (FLAG_trace_service) {
+    OS::Print("vm-service: Dropping event of type PauseStart (%s)\n",
+              isolate()->name());
   }
 }
 
 
 void IsolateMessageHandler::NotifyPauseOnExit() {
   if (Service::debug_stream.enabled()) {
     StartIsolateScope start_isolate(isolate());
     StackZone zone(I);
     HandleScope handle_scope(I);
     ServiceEvent pause_event(isolate(), ServiceEvent::kPauseExit);
     Service::HandleEvent(&pause_event);
+  } else  if (FLAG_trace_service) {
+    OS::Print("vm-service: Dropping event of type PauseExit (%s)\n",
+              isolate()->name());
   }
 }
 
 
 #if defined(DEBUG)
 void IsolateMessageHandler::CheckAccess() {
   ASSERT(IsCurrentIsolate());
 }
 #endif
 
@@ skipping 1636 matching lines @@
                            serialized_message_, serialized_message_len_);
 }
 
 
 void IsolateSpawnState::Cleanup() {
   SwitchIsolateScope switch_scope(I);
   Dart::ShutdownIsolate();
 }
 
 }  // namespace dart