1/*
2 * Copyright (C) 2012 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 "JumpReplacementWatchpoint.h"
28
29#if ENABLE(JIT)
30
31#include "LinkBuffer.h"
32#include "Options.h"
33
34namespace JSC {
35
36void JumpReplacementWatchpoint::correctLabels(LinkBuffer& linkBuffer)
37{
38    MacroAssembler::Label label;
39    label.m_label.m_offset = m_source;
40    m_source = bitwise_cast<uintptr_t>(linkBuffer.locationOf(label).dataLocation());
41    label.m_label.m_offset = m_destination;
42    m_destination = bitwise_cast<uintptr_t>(linkBuffer.locationOf(label).dataLocation());
43}
44
45void JumpReplacementWatchpoint::fireInternal()
46{
47    void* source = bitwise_cast<void*>(m_source);
48    void* destination = bitwise_cast<void*>(m_destination);
49    if (Options::showDisassembly())
50        dataLogF("Firing jump replacement watchpoint from %p, to %p.\n", source, destination);
51    MacroAssembler::replaceWithJump(CodeLocationLabel(source), CodeLocationLabel(destination));
52    if (isOnList())
53        remove();
54}
55
56} // namespace JSC
57
58#endif // ENABLE(JIT)
59
60