1/*
2 * Copyright (C) 2014, 2015 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "GCLogging.h"
28
29#include "ClassInfo.h"
30#include "Heap.h"
31#include "HeapIterationScope.h"
32#include "JSCell.h"
33#include "JSCellInlines.h"
34#include <wtf/PrintStream.h>
35
36namespace JSC {
37
38const char* GCLogging::levelAsString(Level level)
39{
40 switch (level) {
41 case None:
42 return "None";
43 case Basic:
44 return "Basic";
45 case Verbose:
46 return "Verbose";
47 default:
48 RELEASE_ASSERT_NOT_REACHED();
49 return "";
50 }
51}
52
53class LoggingFunctor {
54public:
55 LoggingFunctor(SlotVisitor& slotVisitor)
56 : m_slotVisitor(slotVisitor)
57 {
58 m_savedMarkStack.resize(m_slotVisitor.markStack().size());
59 m_slotVisitor.markStack().fillVector(m_savedMarkStack);
60 }
61
62 ~LoggingFunctor()
63 {
64 reviveCells();
65 }
66
67 IterationStatus operator()(JSCell* cell)
68 {
69 m_liveCells.append(cell);
70 MarkedBlock::blockFor(cell)->clearMarked(cell);
71 return IterationStatus::Continue;
72 }
73
74 void log()
75 {
76 m_slotVisitor.clearMarkStack();
77 for (JSCell* cell : m_liveCells) {
78 cell->methodTable()->visitChildren(cell, m_slotVisitor);
79 dataLog("\n", *cell, ":\n", m_slotVisitor);
80 for (const JSCell* neighbor : m_slotVisitor.markStack())
81 MarkedBlock::blockFor(neighbor)->clearMarked(neighbor);
82 m_slotVisitor.clearMarkStack();
83 }
84 m_slotVisitor.reset();
85 }
86
87 void reviveCells()
88 {
89 for (JSCell* cell : m_liveCells)
90 MarkedBlock::blockFor(cell)->setMarked(cell);
91
92 for (const JSCell* cell : m_savedMarkStack) {
93 m_slotVisitor.markStack().append(cell);
94 cell->setCellState(CellState::OldGrey);
95 }
96 }
97
98 typedef void ReturnType;
99
100 void returnValue() { };
101
102private:
103 Vector<const JSCell*> m_savedMarkStack;
104 Vector<JSCell*> m_liveCells;
105 SlotVisitor& m_slotVisitor;
106};
107
108void GCLogging::dumpObjectGraph(Heap* heap)
109{
110 LoggingFunctor loggingFunctor(heap->m_slotVisitor);
111 HeapIterationScope iterationScope(*heap);
112 heap->objectSpace().forEachLiveCell(iterationScope, loggingFunctor);
113 loggingFunctor.log();
114}
115
116} // namespace JSC
117
118namespace WTF {
119
120void printInternal(PrintStream& out, JSC::GCLogging::Level level)
121{
122 switch (level) {
123 case JSC::GCLogging::Level::None:
124 out.print("None");
125 return;
126 case JSC::GCLogging::Level::Basic:
127 out.print("Basic");
128 return;
129 case JSC::GCLogging::Level::Verbose:
130 out.print("Verbose");
131 return;
132 default:
133 out.print("Level=", level - JSC::GCLogging::Level::None);
134 return;
135 }
136}
137
138} // namespace WTF
139
140