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/*
* Copyright (C) 2015-2017 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. ``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(WTFMove(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 { 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
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