1/* 2 * Copyright (C) 2012, 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 "JITDisassembler.h" 28 29#if ENABLE(JIT) 30 31#include "CodeBlock.h" 32#include "CodeBlockWithJITType.h" 33#include "JIT.h" 34#include "JSCInlines.h" 35#include "LinkBuffer.h" 36#include <wtf/StringPrintStream.h> 37 38namespace JSC { 39 40JITDisassembler::JITDisassembler(CodeBlock *codeBlock) 41 : m_codeBlock(codeBlock) 42 , m_labelForBytecodeIndexInMainPath(codeBlock->instructionCount()) 43 , m_labelForBytecodeIndexInSlowPath(codeBlock->instructionCount()) 44{ 45} 46 47JITDisassembler::~JITDisassembler() 48{ 49} 50 51void JITDisassembler::dump(PrintStream& out, LinkBuffer& linkBuffer) 52{ 53 dumpHeader(out, linkBuffer); 54 dumpDisassembly(out, linkBuffer, m_startOfCode, m_labelForBytecodeIndexInMainPath[0]); 55 56 dumpForInstructions(out, linkBuffer, " ", m_labelForBytecodeIndexInMainPath, firstSlowLabel()); 57 out.print(" (End Of Main Path)\n"); 58 dumpForInstructions(out, linkBuffer, " (S) ", m_labelForBytecodeIndexInSlowPath, m_endOfSlowPath); 59 out.print(" (End Of Slow Path)\n"); 60 61 dumpDisassembly(out, linkBuffer, m_endOfSlowPath, m_endOfCode); 62} 63 64void JITDisassembler::dump(LinkBuffer& linkBuffer) 65{ 66 dump(WTF::dataFile(), linkBuffer); 67} 68 69void JITDisassembler::reportToProfiler(Profiler::Compilation* compilation, LinkBuffer& linkBuffer) 70{ 71 StringPrintStream out; 72 73 dumpHeader(out, linkBuffer); 74 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString())); 75 out.reset(); 76 dumpDisassembly(out, linkBuffer, m_startOfCode, m_labelForBytecodeIndexInMainPath[0]); 77 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString())); 78 79 reportInstructions(compilation, linkBuffer, " ", m_labelForBytecodeIndexInMainPath, firstSlowLabel()); 80 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), " (End Of Main Path)\n")); 81 reportInstructions(compilation, linkBuffer, " (S) ", m_labelForBytecodeIndexInSlowPath, m_endOfSlowPath); 82 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), " (End Of Slow Path)\n")); 83 out.reset(); 84 dumpDisassembly(out, linkBuffer, m_endOfSlowPath, m_endOfCode); 85 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString())); 86} 87 88void JITDisassembler::dumpHeader(PrintStream& out, LinkBuffer& linkBuffer) 89{ 90 out.print("Generated Baseline JIT code for ", CodeBlockWithJITType(m_codeBlock, JITCode::BaselineJIT), ", instruction count = ", m_codeBlock->instructionCount(), "\n"); 91 out.print(" Source: ", m_codeBlock->sourceCodeOnOneLine(), "\n"); 92 out.print(" Code at [", RawPointer(linkBuffer.debugAddress()), ", ", RawPointer(static_cast<char*>(linkBuffer.debugAddress()) + linkBuffer.size()), "):\n"); 93} 94 95MacroAssembler::Label JITDisassembler::firstSlowLabel() 96{ 97 MacroAssembler::Label firstSlowLabel; 98 for (unsigned i = 0; i < m_labelForBytecodeIndexInSlowPath.size(); ++i) { 99 if (m_labelForBytecodeIndexInSlowPath[i].isSet()) { 100 firstSlowLabel = m_labelForBytecodeIndexInSlowPath[i]; 101 break; 102 } 103 } 104 return firstSlowLabel.isSet() ? firstSlowLabel : m_endOfSlowPath; 105} 106 107Vector<JITDisassembler::DumpedOp> JITDisassembler::dumpVectorForInstructions(LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel) 108{ 109 StringPrintStream out; 110 Vector<DumpedOp> result; 111 112 for (unsigned i = 0; i < labels.size();) { 113 if (!labels[i].isSet()) { 114 i++; 115 continue; 116 } 117 out.reset(); 118 result.append(DumpedOp()); 119 result.last().index = i; 120 out.print(prefix); 121 m_codeBlock->dumpBytecode(out, i); 122 for (unsigned nextIndex = i + 1; ; nextIndex++) { 123 if (nextIndex >= labels.size()) { 124 dumpDisassembly(out, linkBuffer, labels[i], endLabel); 125 result.last().disassembly = out.toCString(); 126 return result; 127 } 128 if (labels[nextIndex].isSet()) { 129 dumpDisassembly(out, linkBuffer, labels[i], labels[nextIndex]); 130 result.last().disassembly = out.toCString(); 131 i = nextIndex; 132 break; 133 } 134 } 135 } 136 137 return result; 138} 139 140void JITDisassembler::dumpForInstructions(PrintStream& out, LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel) 141{ 142 Vector<DumpedOp> dumpedOps = dumpVectorForInstructions(linkBuffer, prefix, labels, endLabel); 143 144 for (unsigned i = 0; i < dumpedOps.size(); ++i) 145 out.print(dumpedOps[i].disassembly); 146} 147 148void JITDisassembler::reportInstructions(Profiler::Compilation* compilation, LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel) 149{ 150 Vector<DumpedOp> dumpedOps = dumpVectorForInstructions(linkBuffer, prefix, labels, endLabel); 151 152 for (unsigned i = 0; i < dumpedOps.size(); ++i) { 153 compilation->addDescription( 154 Profiler::CompiledBytecode( 155 Profiler::OriginStack(Profiler::Origin(compilation->bytecodes(), dumpedOps[i].index)), 156 dumpedOps[i].disassembly)); 157 } 158} 159 160void JITDisassembler::dumpDisassembly(PrintStream& out, LinkBuffer& linkBuffer, MacroAssembler::Label from, MacroAssembler::Label to) 161{ 162 CodeLocationLabel fromLocation = linkBuffer.locationOf(from); 163 CodeLocationLabel toLocation = linkBuffer.locationOf(to); 164 disassemble(fromLocation, bitwise_cast<uintptr_t>(toLocation.executableAddress()) - bitwise_cast<uintptr_t>(fromLocation.executableAddress()), " ", out); 165} 166 167} // namespace JSC 168 169#endif // ENABLE(JIT) 170 171