mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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79 lines
2.9 KiB
C++
79 lines
2.9 KiB
C++
/*
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* Copyright (C) 2011, 2013 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "DFGOSRExit.h"
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#if ENABLE(DFG_JIT)
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#include "AssemblyHelpers.h"
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#include "DFGGraph.h"
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#include "DFGMayExit.h"
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#include "DFGSpeculativeJIT.h"
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#include "JSCInlines.h"
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namespace JSC { namespace DFG {
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OSRExit::OSRExit(ExitKind kind, JSValueSource jsValueSource, MethodOfGettingAValueProfile valueProfile, SpeculativeJIT* jit, unsigned streamIndex, unsigned recoveryIndex)
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: OSRExitBase(kind, jit->m_origin.forExit, jit->m_origin.semantic, jit->m_origin.wasHoisted)
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, m_jsValueSource(jsValueSource)
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, m_valueProfile(valueProfile)
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, m_recoveryIndex(recoveryIndex)
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, m_streamIndex(streamIndex)
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{
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bool canExit = jit->m_origin.exitOK;
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if (!canExit && jit->m_currentNode) {
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ExitMode exitMode = mayExit(jit->m_jit.graph(), jit->m_currentNode);
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canExit = exitMode == ExitMode::Exits || exitMode == ExitMode::ExitsForExceptions;
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}
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DFG_ASSERT(jit->m_jit.graph(), jit->m_currentNode, canExit);
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}
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void OSRExit::setPatchableCodeOffset(MacroAssembler::PatchableJump check)
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{
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m_patchableCodeOffset = check.m_jump.m_label.m_offset;
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}
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MacroAssembler::Jump OSRExit::getPatchableCodeOffsetAsJump() const
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{
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return MacroAssembler::Jump(AssemblerLabel(m_patchableCodeOffset));
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}
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CodeLocationJump OSRExit::codeLocationForRepatch(CodeBlock* dfgCodeBlock) const
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{
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return CodeLocationJump(dfgCodeBlock->jitCode()->dataAddressAtOffset(m_patchableCodeOffset));
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}
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void OSRExit::correctJump(LinkBuffer& linkBuffer)
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{
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MacroAssembler::Label label;
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label.m_label.m_offset = m_patchableCodeOffset;
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m_patchableCodeOffset = linkBuffer.offsetOf(label);
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}
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} } // namespace JSC::DFG
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#endif // ENABLE(DFG_JIT)
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