mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
/*
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* Copyright (C) 2011-2018 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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#pragma once
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#include "CodeLocation.h"
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#include "DFGAbstractValue.h"
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#include "DFGFlushFormat.h"
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#include "MacroAssemblerCodeRef.h"
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#include "Operands.h"
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#include <wtf/BitVector.h>
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namespace JSC {
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class CallFrame;
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class CodeBlock;
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namespace DFG {
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#if ENABLE(DFG_JIT)
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struct OSREntryReshuffling {
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OSREntryReshuffling() { }
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OSREntryReshuffling(int fromOffset, int toOffset)
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: fromOffset(fromOffset)
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, toOffset(toOffset)
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{
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}
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int fromOffset;
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int toOffset;
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};
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struct OSREntryData {
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BytecodeIndex m_bytecodeIndex;
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CodeLocationLabel<OSREntryPtrTag> m_machineCode;
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Operands<AbstractValue> m_expectedValues;
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// Use bitvectors here because they tend to only require one word.
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BitVector m_localsForcedDouble;
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BitVector m_localsForcedAnyInt;
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Vector<OSREntryReshuffling> m_reshufflings;
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BitVector m_machineStackUsed;
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void dumpInContext(PrintStream&, DumpContext*) const;
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void dump(PrintStream&) const;
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};
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inline BytecodeIndex getOSREntryDataBytecodeIndex(OSREntryData* osrEntryData)
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{
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return osrEntryData->m_bytecodeIndex;
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}
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struct CatchEntrypointData {
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// We use this when doing OSR entry at catch. We prove the arguments
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// are of the expected type before entering at a catch block.
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MacroAssemblerCodePtr<ExceptionHandlerPtrTag> machineCode;
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Vector<FlushFormat> argumentFormats;
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BytecodeIndex bytecodeIndex;
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};
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// Returns a pointer to a data buffer that the OSR entry thunk will recognize and
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// parse. If this returns null, it means
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void* prepareOSREntry(VM&, CallFrame*, CodeBlock*, BytecodeIndex);
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// If null is returned, we can't OSR enter. If it's not null, it's the PC to jump to.
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MacroAssemblerCodePtr<ExceptionHandlerPtrTag> prepareCatchOSREntry(VM&, CallFrame*, CodeBlock* baselineCodeBlock, CodeBlock* optimizedCodeBlock, BytecodeIndex);
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#else
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inline MacroAssemblerCodePtr<ExceptionHandlerPtrTag> prepareOSREntry(VM&, CallFrame*, CodeBlock*, BytecodeIndex) { return nullptr; }
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#endif
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} } // namespace JSC::DFG
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