src/heap-profiler.h

// Copyright 2009-2010 the V8 project authors. All rights reserved.
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#ifndef V8_HEAP_PROFILER_H_
#define V8_HEAP_PROFILER_H_

#include "isolate.h"

namespace v8 {
namespace internal {

class HeapSnapshot;
class HeapSnapshotsCollection;

#define HEAP_PROFILE(heap, call)                                             \
  do {                                                                       \
    v8::internal::HeapProfiler* profiler = heap->isolate()->heap_profiler(); \
    if (profiler != NULL && profiler->is_profiling()) {                      \
      profiler->call;                                                        \
    }                                                                        \
  } while (false)

class HeapProfiler {
 public:
  static void SetUp();
  static void TearDown();

  static size_t GetMemorySizeUsedByProfiler();

  static HeapSnapshot* TakeSnapshot(
      const char* name,
      int type,
      v8::ActivityControl* control,
      v8::HeapProfiler::ObjectNameResolver* resolver);
  static HeapSnapshot* TakeSnapshot(
      String* name,
      int type,
      v8::ActivityControl* control,
      v8::HeapProfiler::ObjectNameResolver* resolver);

  static void StartHeapObjectsTracking();
  static void StopHeapObjectsTracking();
  static SnapshotObjectId PushHeapObjectsStats(OutputStream* stream);
  static int GetSnapshotsCount();
  static HeapSnapshot* GetSnapshot(int index);
  static HeapSnapshot* FindSnapshot(unsigned uid);
  static SnapshotObjectId GetSnapshotObjectId(Handle<Object> obj);
  static void DeleteAllSnapshots();

  void ObjectMoveEvent(Address from, Address to);

  void DefineWrapperClass(
      uint16_t class_id, v8::HeapProfiler::WrapperInfoCallback callback);

  v8::RetainedObjectInfo* ExecuteWrapperClassCallback(uint16_t class_id,
                                                      Object** wrapper);
  INLINE(bool is_profiling()) {
    return snapshots_->is_tracking_objects();
  }

 private:
  explicit HeapProfiler(Heap* heap);
  ~HeapProfiler();
  HeapSnapshot* TakeSnapshotImpl(
      const char* name,
      int type,
      v8::ActivityControl* control,
      v8::HeapProfiler::ObjectNameResolver* resolver);
  HeapSnapshot* TakeSnapshotImpl(
      String* name,
      int type,
      v8::ActivityControl* control,
      v8::HeapProfiler::ObjectNameResolver* resolver);
  void ResetSnapshots();

  void StartHeapObjectsTrackingImpl();
  void StopHeapObjectsTrackingImpl();
  SnapshotObjectId PushHeapObjectsStatsImpl(OutputStream* stream);

  Heap* heap() const { return snapshots_->heap(); }

  HeapSnapshotsCollection* snapshots_;
  unsigned next_snapshot_uid_;
  List<v8::HeapProfiler::WrapperInfoCallback> wrapper_callbacks_;
};

} }  // namespace v8::internal

#endif  // V8_HEAP_PROFILER_H_