1/*
2 * Copyright (C) 2016-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "HeapCell.h"
28
29#include "HeapCellInlines.h"
30#include "MarkedBlockInlines.h"
31#include <wtf/PrintStream.h>
32
33namespace JSC {
34
35bool HeapCell::isLive()
36{
37 if (isLargeAllocation())
38 return largeAllocation().isLive();
39 auto& markedBlockHandle = markedBlock().handle();
40 if (markedBlockHandle.isFreeListed())
41 return !markedBlockHandle.isFreeListedCell(this);
42 return markedBlockHandle.isLive(this);
43}
44
45#if !COMPILER(GCC_COMPATIBLE)
46void HeapCell::use() const
47{
48}
49#endif
50
51} // namespace JSC
52
53namespace WTF {
54
55using namespace JSC;
56
57void printInternal(PrintStream& out, HeapCell::Kind kind)
58{
59 switch (kind) {
60 case HeapCell::JSCell:
61 out.print("JSCell");
62 return;
63 case HeapCell::JSCellWithInteriorPointers:
64 out.print("JSCellWithInteriorPointers");
65 return;
66 case HeapCell::Auxiliary:
67 out.print("Auxiliary");
68 return;
69 }
70 RELEASE_ASSERT_NOT_REACHED();
71}
72
73} // namespace WTF
74
75