blob: 59ff9d7b6fa955124094ae5196bbd3122f040188 [file] [log] [blame]
/*
* Copyright (C) 2016-2017 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.
*/
#include "config.h"
#include "HeapCell.h"
#include "HeapCellInlines.h"
#include "MarkedBlockInlines.h"
#include <wtf/PrintStream.h>
namespace JSC {
bool HeapCell::isLive()
{
if (isPreciseAllocation())
return preciseAllocation().isLive();
auto& markedBlockHandle = markedBlock().handle();
if (markedBlockHandle.isFreeListed())
return !markedBlockHandle.isFreeListedCell(this);
return markedBlockHandle.isLive(this);
}
#if !COMPILER(GCC_COMPATIBLE)
// This makes the argument opaque from the compiler.
NEVER_INLINE void ensureStillAliveHere(const void*)
{
}
#endif
} // namespace JSC
namespace WTF {
using namespace JSC;
void printInternal(PrintStream& out, HeapCell::Kind kind)
{
switch (kind) {
case HeapCell::JSCell:
out.print("JSCell");
return;
case HeapCell::JSCellWithInteriorPointers:
out.print("JSCellWithInteriorPointers");
return;
case HeapCell::Auxiliary:
out.print("Auxiliary");
return;
}
RELEASE_ASSERT_NOT_REACHED();
}
} // namespace WTF