third_party/WebKit/Source/core/leak_detector/WebLeakDetector.cpp

/*
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 * modification, are permitted provided that the following conditions are
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "public/web/WebLeakDetector.h"

#include "base/macros.h"
#include "core/frame/WebLocalFrameImpl.h"
#include "core/leak_detector/BlinkLeakDetector.h"
#include "core/leak_detector/BlinkLeakDetectorClient.h"
#include "platform/InstanceCounters.h"
#include "public/web/WebFrame.h"

namespace blink {

namespace {

class WebLeakDetectorImpl final : public WebLeakDetector,
                                  public BlinkLeakDetectorClient {

 public:
  explicit WebLeakDetectorImpl(WebLeakDetectorClient* client)
      : client_(client), detector_(nullptr) {
    DCHECK(client_);
  }

  ~WebLeakDetectorImpl() override = default;

  void PrepareForLeakDetection(WebFrame*) override;
  void CollectGarbageAndReport() override;

  // BlinkLeakDetectorClient:
  void OnLeakDetectionComplete() override;

 private:
  WebLeakDetectorClient* client_;
  std::unique_ptr<BlinkLeakDetector> detector_;
  DISALLOW_COPY_AND_ASSIGN(WebLeakDetectorImpl);
};

void WebLeakDetectorImpl::PrepareForLeakDetection(WebFrame* frame) {
  detector_.reset(new BlinkLeakDetector(this));
  detector_->PrepareForLeakDetection(frame);
}

void WebLeakDetectorImpl::CollectGarbageAndReport() {
  detector_->CollectGarbage();
}

void WebLeakDetectorImpl::OnLeakDetectionComplete() {
  DCHECK(client_);

  WebLeakDetectorClient::Result result;
  result.number_of_live_audio_nodes =
      InstanceCounters::CounterValue(InstanceCounters::kAudioHandlerCounter);
  result.number_of_live_documents =
      InstanceCounters::CounterValue(InstanceCounters::kDocumentCounter);
  result.number_of_live_nodes =
      InstanceCounters::CounterValue(InstanceCounters::kNodeCounter);
  result.number_of_live_layout_objects =
      InstanceCounters::CounterValue(InstanceCounters::kLayoutObjectCounter);
  result.number_of_live_resources =
      InstanceCounters::CounterValue(InstanceCounters::kResourceCounter);
  result.number_of_live_pausable_objects =
      InstanceCounters::CounterValue(InstanceCounters::kPausableObjectCounter);
  result.number_of_live_script_promises =
      InstanceCounters::CounterValue(InstanceCounters::kScriptPromiseCounter);
  result.number_of_live_frames =
      InstanceCounters::CounterValue(InstanceCounters::kFrameCounter);
  result.number_of_live_v8_per_context_data = InstanceCounters::CounterValue(
      InstanceCounters::kV8PerContextDataCounter);
  result.number_of_worker_global_scopes = InstanceCounters::CounterValue(
      InstanceCounters::kWorkerGlobalScopeCounter);
  result.number_of_live_ua_css_resources =
      InstanceCounters::CounterValue(InstanceCounters::kUACSSResourceCounter);

  client_->OnLeakDetectionComplete(result);
  detector_.reset();

#ifndef NDEBUG
  showLiveDocumentInstances();
#endif
}

}  // namespace

WebLeakDetector* WebLeakDetector::Create(WebLeakDetectorClient* client) {
  return new WebLeakDetectorImpl(client);
}

}  // namespace blink