Add debug command break flag for debugger host dispatch

test/cctest/test-debug.cc

 // Copyright 2007-2008 the V8 project authors. 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
@@ skipping 4007 matching lines @@
   v8::HandleScope scope;
   DebugLocalContext env;
 
   const int kBufferSize = 1000;
   uint16_t buffer[kBufferSize];
   const char* command_continue =
     "{\"seq\":0,"
      "\"type\":\"request\","
      "\"command\":\"continue\"}";
 
+  // Create an empty function to call for processing debug commands
+  v8::Local<v8::Function> empty =
+      CompileFunction(&env, "function empty(){}", "empty");
+
   // Setup message and host dispatch handlers.
   v8::Debug::SetMessageHandler(DummyMessageHandler);
   v8::Debug::SetHostDispatchHandler(HostDispatchHandlerHitCount,
                                     NULL);
 
-  // Fill a host dispatch and a continue command on the command queue before
-  // running some code.
+  // Send a host dispatch by itself.
+  v8::Debug::SendHostDispatch(NULL);
+  empty->Call(env->Global(), 0, NULL);  // Run JavaScript to activate debugger.
+  CHECK_EQ(1, host_dispatch_hit_count);
+
+  // Fill a host dispatch and a continue command on the command queue.
   v8::Debug::SendHostDispatch(NULL);
   v8::Debug::SendCommand(buffer, AsciiToUtf16(command_continue, buffer));
-  CompileRun("void 0");
+  empty->Call(env->Global(), 0, NULL);  // Run JavaScript to activate debugger.
 
-  // The host dispatch callback should be called.
-  CHECK_EQ(1, host_dispatch_hit_count);
+  // Fill a continue command and a host dispatch on the command queue.
+  v8::Debug::SendCommand(buffer, AsciiToUtf16(command_continue, buffer));
+  v8::Debug::SendHostDispatch(NULL);
+  empty->Call(env->Global(), 0, NULL);  // Run JavaScript to activate debugger.
+  empty->Call(env->Global(), 0, NULL);  // Run JavaScript to activate debugger.
+
+  // All the host dispatch callback should be called.
+  CHECK_EQ(3, host_dispatch_hit_count);
 }
 
 
 TEST(DebuggerAgent) {
   // Make sure this port is not used by other tests to allow tests to run in
   // parallel.
   const int kPort = 5858;
 
   // Make a string with the port number.
   const int kPortBufferLen = 6;
@@ skipping 177 matching lines @@
   bool allow_natives_syntax = i::FLAG_allow_natives_syntax;
   i::FLAG_allow_natives_syntax = true;
   CompileRun(
       "var scripts = %DebugGetLoadedScripts();"
       "for (var i = 0; i < scripts.length; ++i) {"
       "    scripts[i].line_ends;"
       "}");
   // Must not crash while accessing line_ends.
   i::FLAG_allow_natives_syntax = allow_natives_syntax;
 }