Track Hydrogen statistics on a per-Isolate basis

src/isolate.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 50 matching lines @@
 class CpuFeatures;
 class CpuProfiler;
 class DeoptimizerData;
 class Deserializer;
 class EmptyStatement;
 class ExternalReferenceTable;
 class Factory;
 class FunctionInfoListener;
 class HandleScopeImplementer;
 class HeapProfiler;
+class HStatistics;
 class HTracer;
 class InlineRuntimeFunctionsTable;
 class NoAllocationStringAllocator;
 class InnerPointerToCodeCache;
 class MarkingThread;
 class PreallocatedMemoryThread;
 class RegExpStack;
 class SaveContext;
 class UnicodeCache;
 class ConsStringIteratorOp;
@@ skipping 285 matching lines @@
   /* Serializer state. */                                                      \
   V(ExternalReferenceTable*, external_reference_table, NULL)                   \
   /* AstNode state. */                                                         \
   V(int, ast_node_id, 0)                                                       \
   V(unsigned, ast_node_count, 0)                                               \
   /* SafeStackFrameIterator activations count. */                              \
   V(int, safe_stack_iterator_counter, 0)                                       \
   V(CpuProfiler*, cpu_profiler, NULL)                                          \
   V(HeapProfiler*, heap_profiler, NULL)                                        \
   V(bool, observer_delivery_pending, false)                                    \
+  V(HStatistics*, hstatistics, NULL)                                           \
   V(HTracer*, htracer, NULL)                                                   \
   ISOLATE_DEBUGGER_INIT_LIST(V)
 
 class Isolate {
   // These forward declarations are required to make the friend declarations in
   // PerIsolateThreadData work on some older versions of gcc.
   class ThreadDataTable;
   class EntryStackItem;
  public:
   ~Isolate();
@@ skipping 709 matching lines @@
   static v8::Isolate* GetDefaultIsolateForLocking();
 
   MarkingThread** marking_threads() {
     return marking_thread_;
   }
 
   SweeperThread** sweeper_threads() {
     return sweeper_thread_;
   }
 
+  HStatistics* GetHStatistics();
   HTracer* GetHTracer();
 
  private:
   Isolate();
 
   int id() const { return static_cast<int>(id_); }
 
   friend struct GlobalState;
   friend struct InitializeGlobalState;
 
@@ skipping 371 matching lines @@
 
 // Mark the native context with out of memory.
 inline void Context::mark_out_of_memory() {
   native_context()->set_out_of_memory(HEAP->true_value());
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_