Fix for 3303 MultithreadedParallelIsolates has a race condition.

src/isolate.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include "../include/v8-debug.h"
 #include "allocation.h"
 #include "assert-scope.h"
@@ skipping 36 matching lines @@
 class Factory;
 class FunctionInfoListener;
 class HandleScopeImplementer;
 class HeapProfiler;
 class HStatistics;
 class HTracer;
 class InlineRuntimeFunctionsTable;
 class InnerPointerToCodeCache;
 class MaterializedObjectStore;
 class NoAllocationStringAllocator;
+class CodeAgingHelper;
 class RandomNumberGenerator;
 class RegExpStack;
 class SaveContext;
 class StringTracker;
 class StubCache;
 class SweeperThread;
 class ThreadManager;
 class ThreadState;
 class ThreadVisitor;  // Defined in v8threads.h
 class UnicodeCache;
@@ skipping 762 matching lines @@
   Logger* logger() {
     // Call InitializeLoggingAndCounters() if logging is needed before
     // the isolate is fully initialized.
     ASSERT(logger_ != NULL);
     return logger_;
   }
   StackGuard* stack_guard() { return &stack_guard_; }
   Heap* heap() { return &heap_; }
   StatsTable* stats_table();
   StubCache* stub_cache() { return stub_cache_; }
+  CodeAgingHelper* code_aging_helper() { return code_aging_helper_; }
   DeoptimizerData* deoptimizer_data() { return deoptimizer_data_; }
   ThreadLocalTop* thread_local_top() { return &thread_local_top_; }
   MaterializedObjectStore* materialized_object_store() {
     return materialized_object_store_;
   }
 
   MemoryAllocator* memory_allocator() {
     return memory_allocator_;
   }
 
@@ skipping 347 matching lines @@
   CompilationCache* compilation_cache_;
   Counters* counters_;
   CodeRange* code_range_;
   RecursiveMutex break_access_;
   Atomic32 debugger_initialized_;
   RecursiveMutex debugger_access_;
   Logger* logger_;
   StackGuard stack_guard_;
   StatsTable* stats_table_;
   StubCache* stub_cache_;
+  CodeAgingHelper* code_aging_helper_;
   DeoptimizerData* deoptimizer_data_;
   MaterializedObjectStore* materialized_object_store_;
   ThreadLocalTop thread_local_top_;
   bool capture_stack_trace_for_uncaught_exceptions_;
   int stack_trace_for_uncaught_exceptions_frame_limit_;
   StackTrace::StackTraceOptions stack_trace_for_uncaught_exceptions_options_;
   MemoryAllocator* memory_allocator_;
   KeyedLookupCache* keyed_lookup_cache_;
   ContextSlotCache* context_slot_cache_;
   DescriptorLookupCache* descriptor_lookup_cache_;
@@ skipping 275 matching lines @@
   }
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_