root/src/heap-profiler.cc

DEFINITIONS

1. next_snapshot_uid_
2. ResetSnapshots
3. SetUp
4. TearDown
5. TakeSnapshot
6. TakeSnapshot
7. StartHeapObjectsTracking
8. StopHeapObjectsTracking
9. PushHeapObjectsStats
10. DefineWrapperClass
11. ExecuteWrapperClassCallback
12. TakeSnapshotImpl
13. TakeSnapshotImpl
14. StartHeapObjectsTrackingImpl
15. PushHeapObjectsStatsImpl
16. StopHeapObjectsTrackingImpl
17. GetMemorySizeUsedByProfiler
18. GetSnapshotsCount
19. GetSnapshot
20. FindSnapshot
21. GetSnapshotObjectId
22. DeleteAllSnapshots
23. ObjectMoveEvent

// Copyright 2009-2010 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
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "v8.h"

#include "heap-profiler.h"
#include "profile-generator.h"

namespace v8 {
namespace internal {

HeapProfiler::HeapProfiler()
    : snapshots_(new HeapSnapshotsCollection()),
      next_snapshot_uid_(1) {
}


HeapProfiler::~HeapProfiler() {
  delete snapshots_;
}


void HeapProfiler::ResetSnapshots() {
  delete snapshots_;
  snapshots_ = new HeapSnapshotsCollection();
}


void HeapProfiler::SetUp() {
  Isolate* isolate = Isolate::Current();
  if (isolate->heap_profiler() == NULL) {
    isolate->set_heap_profiler(new HeapProfiler());
  }
}


void HeapProfiler::TearDown() {
  Isolate* isolate = Isolate::Current();
  delete isolate->heap_profiler();
  isolate->set_heap_profiler(NULL);
}


HeapSnapshot* HeapProfiler::TakeSnapshot(const char* name,
                                         int type,
                                         v8::ActivityControl* control) {
  ASSERT(Isolate::Current()->heap_profiler() != NULL);
  return Isolate::Current()->heap_profiler()->TakeSnapshotImpl(name,
                                                               type,
                                                               control);
}


HeapSnapshot* HeapProfiler::TakeSnapshot(String* name,
                                         int type,
                                         v8::ActivityControl* control) {
  ASSERT(Isolate::Current()->heap_profiler() != NULL);
  return Isolate::Current()->heap_profiler()->TakeSnapshotImpl(name,
                                                               type,
                                                               control);
}


void HeapProfiler::StartHeapObjectsTracking() {
  ASSERT(Isolate::Current()->heap_profiler() != NULL);
  Isolate::Current()->heap_profiler()->StartHeapObjectsTrackingImpl();
}


void HeapProfiler::StopHeapObjectsTracking() {
  ASSERT(Isolate::Current()->heap_profiler() != NULL);
  Isolate::Current()->heap_profiler()->StopHeapObjectsTrackingImpl();
}


SnapshotObjectId HeapProfiler::PushHeapObjectsStats(v8::OutputStream* stream) {
  ASSERT(Isolate::Current()->heap_profiler() != NULL);
  return Isolate::Current()->heap_profiler()->PushHeapObjectsStatsImpl(stream);
}


void HeapProfiler::DefineWrapperClass(
    uint16_t class_id, v8::HeapProfiler::WrapperInfoCallback callback) {
  ASSERT(class_id != v8::HeapProfiler::kPersistentHandleNoClassId);
  if (wrapper_callbacks_.length() <= class_id) {
    wrapper_callbacks_.AddBlock(
        NULL, class_id - wrapper_callbacks_.length() + 1);
  }
  wrapper_callbacks_[class_id] = callback;
}


v8::RetainedObjectInfo* HeapProfiler::ExecuteWrapperClassCallback(
    uint16_t class_id, Object** wrapper) {
  if (wrapper_callbacks_.length() <= class_id) return NULL;
  return wrapper_callbacks_[class_id](
      class_id, Utils::ToLocal(Handle<Object>(wrapper)));
}


HeapSnapshot* HeapProfiler::TakeSnapshotImpl(const char* name,
                                             int type,
                                             v8::ActivityControl* control) {
  HeapSnapshot::Type s_type = static_cast<HeapSnapshot::Type>(type);
  HeapSnapshot* result =
      snapshots_->NewSnapshot(s_type, name, next_snapshot_uid_++);
  bool generation_completed = true;
  switch (s_type) {
    case HeapSnapshot::kFull: {
      HeapSnapshotGenerator generator(result, control);
      generation_completed = generator.GenerateSnapshot();
      break;
    }
    default:
      UNREACHABLE();
  }
  if (!generation_completed) {
    delete result;
    result = NULL;
  }
  snapshots_->SnapshotGenerationFinished(result);
  return result;
}


HeapSnapshot* HeapProfiler::TakeSnapshotImpl(String* name,
                                             int type,
                                             v8::ActivityControl* control) {
  return TakeSnapshotImpl(snapshots_->names()->GetName(name), type, control);
}

void HeapProfiler::StartHeapObjectsTrackingImpl() {
  snapshots_->StartHeapObjectsTracking();
}


SnapshotObjectId HeapProfiler::PushHeapObjectsStatsImpl(OutputStream* stream) {
  return snapshots_->PushHeapObjectsStats(stream);
}


void HeapProfiler::StopHeapObjectsTrackingImpl() {
  snapshots_->StopHeapObjectsTracking();
}


size_t HeapProfiler::GetMemorySizeUsedByProfiler() {
  HeapProfiler* profiler = Isolate::Current()->heap_profiler();
  ASSERT(profiler != NULL);
  size_t size = profiler->snapshots_->GetUsedMemorySize();
  return size;
}


int HeapProfiler::GetSnapshotsCount() {
  HeapProfiler* profiler = Isolate::Current()->heap_profiler();
  ASSERT(profiler != NULL);
  return profiler->snapshots_->snapshots()->length();
}


HeapSnapshot* HeapProfiler::GetSnapshot(int index) {
  HeapProfiler* profiler = Isolate::Current()->heap_profiler();
  ASSERT(profiler != NULL);
  return profiler->snapshots_->snapshots()->at(index);
}


HeapSnapshot* HeapProfiler::FindSnapshot(unsigned uid) {
  HeapProfiler* profiler = Isolate::Current()->heap_profiler();
  ASSERT(profiler != NULL);
  return profiler->snapshots_->GetSnapshot(uid);
}


SnapshotObjectId HeapProfiler::GetSnapshotObjectId(Handle<Object> obj) {
  if (!obj->IsHeapObject())
    return v8::HeapProfiler::kUnknownObjectId;
  HeapProfiler* profiler = Isolate::Current()->heap_profiler();
  ASSERT(profiler != NULL);
  return profiler->snapshots_->FindObjectId(HeapObject::cast(*obj)->address());
}


void HeapProfiler::DeleteAllSnapshots() {
  HeapProfiler* profiler = Isolate::Current()->heap_profiler();
  ASSERT(profiler != NULL);
  profiler->ResetSnapshots();
}


void HeapProfiler::ObjectMoveEvent(Address from, Address to) {
  snapshots_->ObjectMoveEvent(from, to);
}


} }  // namespace v8::internal