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/*
* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
*
* The MemorySampler class samples a number of internal and external memory
* metrics every second while running. Sample data is written to a log file.
* Sampling occurs over a duration specified when started. If duration is set
* to 0 (default), the memory sampler will run indefinitely until the stop
* function is called. MemorySampler allows the option of sampling "in use"
* memory (committed memory minus free list byte count) or committed memory for
* any allocator which keeps a free list. This includes FastMalloc and the
* JavaScriptCore heap at this time.
* The following memory metrics are recorded:
*
* WebCore
* - FastMalloc allocations bytes (in use or committed)
* JavaScriptCore
* - Garbage collector heap bytes (in use or committed)
* - Stack bytes (committed only!)
* - JIT Code bytes (committed only!)
* Malloc zones
* - In use bytes for the following zones:
* * Default zone (in use or committed)
* * DispCon zone (in use or committed)
* * Purgable zone (in use or committed)
* Task Info
* - Resident size memory (RSIZE)
*/
#ifndef WebMemorySampler_h
#define WebMemorySampler_h
#if ENABLE(MEMORY_SAMPLER)
#include "SandboxExtension.h"
#include <WebCore/Timer.h>
#include <wtf/FileSystem.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
namespace WebKit {
struct SystemMallocStats;
struct WebMemoryStatistics {
Vector<String> keys;
Vector<size_t> values;
};
class WebMemorySampler {
WTF_MAKE_NONCOPYABLE(WebMemorySampler);
public:
static WebMemorySampler* singleton();
void start(const double interval = 0);
void start(SandboxExtension::Handle&&, const String&, const double interval = 0);
void stop();
bool isRunning() const;
// Do nothing since this is a singleton.
void ref() const { }
void deref() const { }
private:
WebMemorySampler();
~WebMemorySampler();
void initializeTempLogFile();
void initializeSandboxedLogFile(SandboxExtension::Handle&&, const String&);
void writeHeaders();
void initializeTimers(double);
void sampleTimerFired();
void stopTimerFired();
void appendCurrentMemoryUsageToFile(FileSystem::PlatformFileHandle&);
void sendMemoryPressureEvent();
SystemMallocStats sampleSystemMalloc() const;
size_t sampleProcessCommittedBytes() const;
WebMemoryStatistics sampleWebKit() const;
String processName() const;
FileSystem::PlatformFileHandle m_sampleLogFile { FileSystem::invalidPlatformFileHandle };
String m_sampleLogFilePath;
WebCore::Timer m_sampleTimer;
WebCore::Timer m_stopTimer;
bool m_isRunning;
double m_runningTime;
RefPtr<SandboxExtension> m_sampleLogSandboxExtension;
};
}
#endif
#endif
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