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/*
* Copyright (C) 2013 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.
*/
#include "config.h"
#include "Disassembler.h"
#if ENABLE(DISASSEMBLER)
#if USE(UDIS86) || USE(LLVM_DISASSEMBLER)
#include "MacroAssemblerCodeRef.h"
#include "Options.h"
#include "UDis86Disassembler.h"
#include "LLVMDisassembler.h"
namespace JSC {
// This horrifying monster is needed because neither of our disassemblers supports
// all of x86, and using them together to disassemble the same instruction stream
// would result in a fairly jarring print-out since they print in different
// styles. Maybe we can do better in the future, but for now the caller hints
// whether he's using the subset of the architecture that our MacroAssembler
// supports (in which case we go with UDis86) or if he's using the LLVM subset.
bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out, InstructionSubsetHint subsetHint)
{
if (Options::forceUDis86Disassembler())
return tryToDisassembleWithUDis86(codePtr, size, prefix, out, subsetHint);
if (Options::forceLLVMDisassembler())
return tryToDisassembleWithLLVM(codePtr, size, prefix, out, subsetHint);
if (subsetHint == MacroAssemblerSubset
&& tryToDisassembleWithUDis86(codePtr, size, prefix, out, MacroAssemblerSubset))
return true;
if (subsetHint == LLVMSubset
&& tryToDisassembleWithLLVM(codePtr, size, prefix, out, LLVMSubset))
return true;
if (tryToDisassembleWithUDis86(codePtr, size, prefix, out, subsetHint))
return true;
if (tryToDisassembleWithLLVM(codePtr, size, prefix, out, subsetHint))
return true;
RELEASE_ASSERT_NOT_REACHED();
return false;
}
} // namespace JSC
#endif // USE(UDIS86) || USE(LLVM_DISASSEMBLER)
#endif // ENABLE(DISASSEMBLER)
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