/* * Copyright (C) 2013, 2014 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) && (CPU(X86_64) || CPU(X86))) #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)