WebKit/Source/JavaScriptCore/tools/CellProfile.h at main · WebKit/WebKit · GitHub

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* 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. ``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

* 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.

#pragma once

#include "JSCast.h"

#include "Structure.h"

#include <wtf/MonotonicTime.h>

#include <wtf/StackTrace.h>

namespace JSC {

struct CellProfile {

enum Liveness {

Unknown,

Dead,

Live

};

CellProfile(HeapCell* cell, HeapCell::Kind kind, Liveness liveness)

: m_cell(cell)

, m_kind(kind)

, m_liveness(liveness)

, m_timestamp(MonotonicTime::now())

{

if (isJSCellKind(m_kind) && m_liveness != Dead)

m_className = jsCell()->structure()->classInfoForCells()->className;

}

CellProfile(CellProfile&& other)

: m_cell(other.m_cell)

, m_kind(other.m_kind)

, m_liveness(other.m_liveness)

, m_timestamp(other.m_timestamp)

, m_className(other.m_className)

, m_stackTrace(WTF::move(other.m_stackTrace))

{ }

HeapCell* cell() const { return m_cell; }

JSCell* jsCell() const

{

ASSERT(isJSCell());

return static_cast<JSCell*>(m_cell);

}

bool isJSCell() const { return isJSCellKind(m_kind); }

HeapCell::Kind kind() const { return m_kind; }

bool isLive() const { return m_liveness == Live; }

bool isDead() const { return m_liveness == Dead; }

void setIsLive() { m_liveness = Live; }

void setIsDead() { m_liveness = Dead; }

MonotonicTime timestamp() const { return m_timestamp; }

const char* className() const { return m_className; }

StackTrace* stackTrace() const LIFETIME_BOUND { return m_stackTrace.get(); }

void setStackTrace(StackTrace* trace) { m_stackTrace = std::unique_ptr<StackTrace>(trace); }

private:

HeapCell* m_cell;

HeapCell::Kind m_kind;

Liveness m_liveness { Unknown };

MonotonicTime m_timestamp;

const char* m_className { nullptr };

std::unique_ptr<StackTrace> m_stackTrace;

};

} // namespace JSC

WebKit/Source/JavaScriptCore/tools/CellProfile.h at main · WebKit/WebKit · GitHub

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