1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/*
* Copyright (C) 2012 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 "JumpReplacementWatchpoint.h"
#if ENABLE(JIT)
#include "LinkBuffer.h"
namespace JSC {
void JumpReplacementWatchpoint::correctLabels(LinkBuffer& linkBuffer)
{
MacroAssembler::Label label;
label.m_label.m_offset = m_source;
m_source = bitwise_cast<uintptr_t>(linkBuffer.locationOf(label).dataLocation());
label.m_label.m_offset = m_destination;
m_destination = bitwise_cast<uintptr_t>(linkBuffer.locationOf(label).dataLocation());
}
void JumpReplacementWatchpoint::fireInternal()
{
void* source = bitwise_cast<void*>(m_source);
void* destination = bitwise_cast<void*>(m_destination);
if (Options::showDisassembly())
dataLog("Firing jump replacement watchpoint from %p, to %p.\n", source, destination);
MacroAssembler::replaceWithJump(CodeLocationLabel(source), CodeLocationLabel(destination));
if (isOnList())
remove();
}
} // namespace JSC
#endif // ENABLE(JIT)
|
