1/*
2 * Copyright (C) 2011, 2013 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 "DFGOSRExit.h"
28
29#if ENABLE(DFG_JIT)
30
31#include "AssemblyHelpers.h"
32#include "DFGGraph.h"
33#include "DFGSpeculativeJIT.h"
34#include "JSCInlines.h"
35
36namespace JSC { namespace DFG {
37
38OSRExit::OSRExit(ExitKind kind, JSValueSource jsValueSource, MethodOfGettingAValueProfile valueProfile, SpeculativeJIT* jit, unsigned streamIndex, unsigned recoveryIndex)
39    : OSRExitBase(kind, jit->m_codeOriginForExitTarget, jit->m_codeOriginForExitProfile)
40    , m_jsValueSource(jsValueSource)
41    , m_valueProfile(valueProfile)
42    , m_patchableCodeOffset(0)
43    , m_recoveryIndex(recoveryIndex)
44    , m_streamIndex(streamIndex)
45{
46    ASSERT(m_codeOrigin.isSet());
47}
48
49void OSRExit::setPatchableCodeOffset(MacroAssembler::PatchableJump check)
50{
51    m_patchableCodeOffset = check.m_jump.m_label.m_offset;
52}
53
54MacroAssembler::Jump OSRExit::getPatchableCodeOffsetAsJump() const
55{
56    return MacroAssembler::Jump(AssemblerLabel(m_patchableCodeOffset));
57}
58
59CodeLocationJump OSRExit::codeLocationForRepatch(CodeBlock* dfgCodeBlock) const
60{
61    return CodeLocationJump(dfgCodeBlock->jitCode()->dataAddressAtOffset(m_patchableCodeOffset));
62}
63
64void OSRExit::correctJump(LinkBuffer& linkBuffer)
65{
66    MacroAssembler::Label label;
67    label.m_label.m_offset = m_patchableCodeOffset;
68    m_patchableCodeOffset = linkBuffer.offsetOf(label);
69}
70
71} } // namespace JSC::DFG
72
73#endif // ENABLE(DFG_JIT)
74