src/heap-profiler.cc

// Copyright 2009-2010 the V8 project authors. All rights reserved.
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#include "v8.h"

#include "heap-profiler.h"
#include "heap-snapshot-generator-inl.h"

namespace v8 {
namespace internal {

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


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


void HeapProfiler::ResetSnapshots() {
  Heap* the_heap = heap();
  delete snapshots_;
  snapshots_ = new HeapSnapshotsCollection(the_heap);
}


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


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,
    v8::HeapProfiler::ObjectNameResolver* resolver) {
  ASSERT(Isolate::Current()->heap_profiler() != NULL);
  return Isolate::Current()->heap_profiler()->TakeSnapshotImpl(name,
                                                               type,
                                                               control,
                                                               resolver);
}


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


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,
    v8::HeapProfiler::ObjectNameResolver* resolver) {
  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, resolver, heap());
      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,
    v8::HeapProfiler::ObjectNameResolver* resolver) {
  return TakeSnapshotImpl(snapshots_->names()->GetName(name), type, control,
                          resolver);
}

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