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