Run Crankshaft on a separate thread.

test/cctest/test-debug.cc

Index: test/cctest/test-debug.cc
diff --git a/test/cctest/test-debug.cc b/test/cctest/test-debug.cc
index e40f406c3c5f869743cb13e2f0d75b4afb95b480..87d77d946e98df18e06ae2cde974abe4999645b8 100644
--- a/test/cctest/test-debug.cc
+++ b/test/cctest/test-debug.cc
@@ -5043,16 +5043,20 @@ void V8Thread::Run() {
       "foo();\n";
 
   v8::V8::Initialize();
-  v8::HandleScope scope;
-  DebugLocalContext env;
-  v8::Debug::SetMessageHandler2(&ThreadedMessageHandler);
-  v8::Handle<v8::ObjectTemplate> global_template = v8::ObjectTemplate::New();
-  global_template->Set(v8::String::New("ThreadedAtBarrier1"),
-                       v8::FunctionTemplate::New(ThreadedAtBarrier1));
-  v8::Handle<v8::Context> context = v8::Context::New(NULL, global_template);
-  v8::Context::Scope context_scope(context);
+  {
+    v8::HandleScope scope;
+    DebugLocalContext env;
+    v8::Debug::SetMessageHandler2(&ThreadedMessageHandler);
+    v8::Handle<v8::ObjectTemplate> global_template = v8::ObjectTemplate::New();
+    global_template->Set(v8::String::New("ThreadedAtBarrier1"),
+                         v8::FunctionTemplate::New(ThreadedAtBarrier1));
+    v8::Handle<v8::Context> context = v8::Context::New(NULL, global_template);
+    v8::Context::Scope context_scope(context);
+
+    CompileRun(source);
+  }
 
-  CompileRun(source);
+  v8::V8::Dispose();
 }
 
 void DebuggerThread::Run() {
@@ -5156,14 +5160,18 @@ void BreakpointsV8Thread::Run() {
     "cat(19);\n";
 
   v8::V8::Initialize();
-  v8::HandleScope scope;
-  DebugLocalContext env;
-  v8::Debug::SetMessageHandler2(&BreakpointsMessageHandler);
+  {
+    v8::HandleScope scope;
+    DebugLocalContext env;
+    v8::Debug::SetMessageHandler2(&BreakpointsMessageHandler);
 
-  CompileRun(source_1);
-  breakpoints_barriers->barrier_1.Wait();
-  breakpoints_barriers->barrier_2.Wait();
-  CompileRun(source_2);
+    CompileRun(source_1);
+    breakpoints_barriers->barrier_1.Wait();
+    breakpoints_barriers->barrier_2.Wait();
+    CompileRun(source_2);
+  }
+
+  v8::V8::Dispose();
 }
 
 
@@ -5701,17 +5709,21 @@ void HostDispatchV8Thread::Run() {
   const char* source_2 = "cat(17);\n";
 
   v8::V8::Initialize();
-  v8::HandleScope scope;
-  DebugLocalContext env;
+  {
+    v8::HandleScope scope;
+    DebugLocalContext env;
 
-  // Set up message and host dispatch handlers.
-  v8::Debug::SetMessageHandler2(HostDispatchMessageHandler);
-  v8::Debug::SetHostDispatchHandler(HostDispatchDispatchHandler, 10 /* ms */);
+    // Set up message and host dispatch handlers.
+    v8::Debug::SetMessageHandler2(HostDispatchMessageHandler);
+    v8::Debug::SetHostDispatchHandler(HostDispatchDispatchHandler, 10 /* ms */);
 
-  CompileRun(source_1);
-  host_dispatch_barriers->barrier_1.Wait();
-  host_dispatch_barriers->barrier_2.Wait();
-  CompileRun(source_2);
+    CompileRun(source_1);
+    host_dispatch_barriers->barrier_1.Wait();
+    host_dispatch_barriers->barrier_2.Wait();
+    CompileRun(source_2);
+  }
+
+  v8::V8::Dispose();
 }
 
 
@@ -5789,16 +5801,20 @@ static void DebugMessageHandler() {
 
 void DebugMessageDispatchV8Thread::Run() {
   v8::V8::Initialize();
-  v8::HandleScope scope;
-  DebugLocalContext env;
+  {
+    v8::HandleScope scope;
+    DebugLocalContext env;
 
-  // Set up debug message dispatch handler.
-  v8::Debug::SetDebugMessageDispatchHandler(DebugMessageHandler);
+    // Set up debug message dispatch handler.
+    v8::Debug::SetDebugMessageDispatchHandler(DebugMessageHandler);
 
-  CompileRun("var y = 1 + 2;\n");
-  debug_message_dispatch_barriers->barrier_1.Wait();
-  debug_message_dispatch_barriers->semaphore_1->Wait();
-  debug_message_dispatch_barriers->barrier_2.Wait();
+    CompileRun("var y = 1 + 2;\n");
+    debug_message_dispatch_barriers->barrier_1.Wait();
+    debug_message_dispatch_barriers->semaphore_1->Wait();
+    debug_message_dispatch_barriers->barrier_2.Wait();
+  }
+
+  v8::V8::Dispose();
 }