mirror of
https://github.com/flutter/flutter.git
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111 lines
4.2 KiB
C++
111 lines
4.2 KiB
C++
/*
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* Copyright (C) 2010 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "bindings/core/v8/ScriptGCEvent.h"
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#include "bindings/core/v8/V8Binding.h"
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#include "core/inspector/ScriptGCEventListener.h"
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#include "wtf/CurrentTime.h"
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namespace blink {
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static GCEventData* isolateGCEventData()
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{
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V8PerIsolateData* isolateData = V8PerIsolateData::from(v8::Isolate::GetCurrent());
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ASSERT(isolateData);
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return isolateData->gcEventData();
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}
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void ScriptGCEvent::addEventListener(ScriptGCEventListener* eventListener)
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{
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GCEventData::GCEventListeners& listeners = isolateGCEventData()->listeners();
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if (listeners.isEmpty()) {
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v8::V8::AddGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
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v8::V8::AddGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
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}
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listeners.append(eventListener);
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}
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void ScriptGCEvent::removeEventListener(ScriptGCEventListener* eventListener)
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{
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ASSERT(eventListener);
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GCEventData::GCEventListeners& listeners = isolateGCEventData()->listeners();
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ASSERT(!listeners.isEmpty());
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size_t i = listeners.find(eventListener);
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ASSERT(i != kNotFound);
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listeners.remove(i);
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if (listeners.isEmpty()) {
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v8::V8::RemoveGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
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v8::V8::RemoveGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
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}
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}
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void ScriptGCEvent::getHeapSize(HeapInfo& info)
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{
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v8::HeapStatistics heapStatistics;
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v8::Isolate::GetCurrent()->GetHeapStatistics(&heapStatistics);
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info.usedJSHeapSize = heapStatistics.used_heap_size();
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info.totalJSHeapSize = heapStatistics.total_physical_size();
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info.jsHeapSizeLimit = heapStatistics.heap_size_limit();
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}
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size_t ScriptGCEvent::getUsedHeapSize()
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{
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v8::HeapStatistics heapStatistics;
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v8::Isolate::GetCurrent()->GetHeapStatistics(&heapStatistics);
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return heapStatistics.used_heap_size();
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}
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void ScriptGCEvent::gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags)
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{
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GCEventData* gcEventData = isolateGCEventData();
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gcEventData->setStartTime(WTF::monotonicallyIncreasingTime());
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gcEventData->setUsedHeapSize(getUsedHeapSize());
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}
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void ScriptGCEvent::gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags)
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{
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GCEventData* gcEventData = isolateGCEventData();
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if (!gcEventData->usedHeapSize())
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return;
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double endTime = WTF::monotonicallyIncreasingTime();
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size_t usedHeapSize = getUsedHeapSize();
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size_t collectedBytes = usedHeapSize > gcEventData->usedHeapSize() ? 0 : gcEventData->usedHeapSize() - usedHeapSize;
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GCEventData::GCEventListeners& listeners = gcEventData->listeners();
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for (GCEventData::GCEventListeners::iterator i = listeners.begin(); i != listeners.end(); ++i)
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(*i)->didGC(gcEventData->startTime(), endTime, collectedBytes);
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gcEventData->clear();
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}
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} // namespace blink
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