Run Crankshaft on a separate thread.

test/cctest/test-debug.cc

 // Copyright 2012 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 443 matching lines @@
   Isolate::Current()->debugger()->never_unload_debugger_ = false;
   Isolate::Current()->debugger()->UnloadDebugger();
 }
 
 
 } }  // namespace v8::internal
 
 
 // Check that the debugger has been fully unloaded.
 static void CheckDebuggerUnloaded(bool check_functions = false) {
-  // Let debugger to unload itself synchronously
-  v8::Debug::ProcessDebugMessages();
+  if (i::FLAG_optimize_in_parallel) {
+    v8::HandleScope scope;
 
-  v8::internal::CheckDebuggerUnloaded(check_functions);
+    // Let debugger to unload itself synchronously
+    v8::Debug::ProcessDebugMessages();
+    v8::internal::CheckDebuggerUnloaded(check_functions);
+  } else {
+    // Let debugger to unload itself synchronously
+    v8::Debug::ProcessDebugMessages();
+    v8::internal::CheckDebuggerUnloaded(check_functions);
+  }
 }
 
 
 // Inherit from BreakLocationIterator to get access to protected parts for
 // testing.
 class TestBreakLocationIterator: public v8::internal::BreakLocationIterator {
  public:
   explicit TestBreakLocationIterator(Handle<v8::internal::DebugInfo> debug_info)
     : BreakLocationIterator(debug_info, v8::internal::SOURCE_BREAK_LOCATIONS) {}
   v8::internal::RelocIterator* it() { return reloc_iterator_; }
@@ skipping 6866 matching lines @@
       "g(false);                       \n"
       "%OptimizeFunctionOnNextCall(g); \n"
       "g(true);";
   v8::Debug::SetDebugEventListener(DebugBreakInlineListener);
   inline_script = v8::Script::Compile(v8::String::New(source));
   inline_script->Run();
 }
 
 
 #endif  // ENABLE_DEBUGGER_SUPPORT