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