Optimize functions on a second thread.

src/heap-inl.h

 // 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 754 matching lines @@
 
 
 DisallowAllocationFailure::~DisallowAllocationFailure() {
   HEAP->disallow_allocation_failure_ = old_state_;
 }
 #endif
 
 
 #ifdef DEBUG
 AssertNoAllocation::AssertNoAllocation() {
-  old_state_ = HEAP->allow_allocation(false);
+  Isolate* isolate = ISOLATE;
+  active_ = !isolate->optimizing_compiler_thread()->IsOptimizerThread();
+  if (active_) {
+    old_state_ = isolate->heap()->allow_allocation(false);
+  }
 }
 
 
 AssertNoAllocation::~AssertNoAllocation() {
-  HEAP->allow_allocation(old_state_);
+  if (active_) HEAP->allow_allocation(old_state_);
 }
 
 
 DisableAssertNoAllocation::DisableAssertNoAllocation() {
-  old_state_ = HEAP->allow_allocation(true);
+  Isolate* isolate = ISOLATE;
+  active_ = !isolate->optimizing_compiler_thread()->IsOptimizerThread();
+  if (active_) {
+    old_state_ = isolate->heap()->allow_allocation(true);
+  }
 }
 
 
 DisableAssertNoAllocation::~DisableAssertNoAllocation() {
-  HEAP->allow_allocation(old_state_);
+  if (active_) HEAP->allow_allocation(old_state_);
 }
 
 #else
 
 AssertNoAllocation::AssertNoAllocation() { }
 AssertNoAllocation::~AssertNoAllocation() { }
 DisableAssertNoAllocation::DisableAssertNoAllocation() { }
 DisableAssertNoAllocation::~DisableAssertNoAllocation() { }
 
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_