1/*
2 * Copyright (C) 2012-2018 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 "Disassembler.h"
34#include "JIT.h"
35#include "JSCInlines.h"
36#include "LinkBuffer.h"
37#include "ProfilerCompilation.h"
38#include <wtf/StringPrintStream.h>
39
40namespace JSC {
41
42JITDisassembler::JITDisassembler(CodeBlock *codeBlock)
43 : m_codeBlock(codeBlock)
44 , m_labelForBytecodeIndexInMainPath(codeBlock->instructions().size())
45 , m_labelForBytecodeIndexInSlowPath(codeBlock->instructions().size())
46{
47}
48
49JITDisassembler::~JITDisassembler()
50{
51}
52
53void JITDisassembler::dump(PrintStream& out, LinkBuffer& linkBuffer)
54{
55 dumpHeader(out, linkBuffer);
56 dumpDisassembly(out, linkBuffer, m_startOfCode, m_labelForBytecodeIndexInMainPath[0]);
57
58 dumpForInstructions(out, linkBuffer, " ", m_labelForBytecodeIndexInMainPath, firstSlowLabel());
59 out.print(" (End Of Main Path)\n");
60 dumpForInstructions(out, linkBuffer, " (S) ", m_labelForBytecodeIndexInSlowPath, m_endOfSlowPath);
61 out.print(" (End Of Slow Path)\n");
62
63 dumpDisassembly(out, linkBuffer, m_endOfSlowPath, m_endOfCode);
64}
65
66void JITDisassembler::dump(LinkBuffer& linkBuffer)
67{
68 dump(WTF::dataFile(), linkBuffer);
69}
70
71void JITDisassembler::reportToProfiler(Profiler::Compilation* compilation, LinkBuffer& linkBuffer)
72{
73 StringPrintStream out;
74
75 dumpHeader(out, linkBuffer);
76 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString()));
77 out.reset();
78 dumpDisassembly(out, linkBuffer, m_startOfCode, m_labelForBytecodeIndexInMainPath[0]);
79 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString()));
80
81 reportInstructions(compilation, linkBuffer, " ", m_labelForBytecodeIndexInMainPath, firstSlowLabel());
82 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), " (End Of Main Path)\n"));
83 reportInstructions(compilation, linkBuffer, " (S) ", m_labelForBytecodeIndexInSlowPath, m_endOfSlowPath);
84 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), " (End Of Slow Path)\n"));
85 out.reset();
86 dumpDisassembly(out, linkBuffer, m_endOfSlowPath, m_endOfCode);
87 compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString()));
88}
89
90void JITDisassembler::dumpHeader(PrintStream& out, LinkBuffer& linkBuffer)
91{
92 out.print("Generated Baseline JIT code for ", CodeBlockWithJITType(m_codeBlock, JITType::BaselineJIT), ", instructions size = ", m_codeBlock->instructionsSize(), "\n");
93 out.print(" Source: ", m_codeBlock->sourceCodeOnOneLine(), "\n");
94 out.print(" Code at [", RawPointer(linkBuffer.debugAddress()), ", ", RawPointer(static_cast<char*>(linkBuffer.debugAddress()) + linkBuffer.size()), "):\n");
95}
96
97MacroAssembler::Label JITDisassembler::firstSlowLabel()
98{
99 MacroAssembler::Label firstSlowLabel;
100 for (unsigned i = 0; i < m_labelForBytecodeIndexInSlowPath.size(); ++i) {
101 if (m_labelForBytecodeIndexInSlowPath[i].isSet()) {
102 firstSlowLabel = m_labelForBytecodeIndexInSlowPath[i];
103 break;
104 }
105 }
106 return firstSlowLabel.isSet() ? firstSlowLabel : m_endOfSlowPath;
107}
108
109Vector<JITDisassembler::DumpedOp> JITDisassembler::dumpVectorForInstructions(LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel)
110{
111 StringPrintStream out;
112 Vector<DumpedOp> result;
113
114 for (unsigned i = 0; i < labels.size();) {
115 if (!labels[i].isSet()) {
116 i++;
117 continue;
118 }
119 out.reset();
120 result.append(DumpedOp());
121 result.last().index = i;
122 out.print(prefix);
123 m_codeBlock->dumpBytecode(out, i);
124 for (unsigned nextIndex = i + 1; ; nextIndex++) {
125 if (nextIndex >= labels.size()) {
126 dumpDisassembly(out, linkBuffer, labels[i], endLabel);
127 result.last().disassembly = out.toCString();
128 return result;
129 }
130 if (labels[nextIndex].isSet()) {
131 dumpDisassembly(out, linkBuffer, labels[i], labels[nextIndex]);
132 result.last().disassembly = out.toCString();
133 i = nextIndex;
134 break;
135 }
136 }
137 }
138
139 return result;
140}
141
142void JITDisassembler::dumpForInstructions(PrintStream& out, LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel)
143{
144 Vector<DumpedOp> dumpedOps = dumpVectorForInstructions(linkBuffer, prefix, labels, endLabel);
145
146 for (unsigned i = 0; i < dumpedOps.size(); ++i)
147 out.print(dumpedOps[i].disassembly);
148}
149
150void JITDisassembler::reportInstructions(Profiler::Compilation* compilation, LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel)
151{
152 Vector<DumpedOp> dumpedOps = dumpVectorForInstructions(linkBuffer, prefix, labels, endLabel);
153
154 for (unsigned i = 0; i < dumpedOps.size(); ++i) {
155 compilation->addDescription(
156 Profiler::CompiledBytecode(
157 Profiler::OriginStack(Profiler::Origin(compilation->bytecodes(), dumpedOps[i].index)),
158 dumpedOps[i].disassembly));
159 }
160}
161
162void JITDisassembler::dumpDisassembly(PrintStream& out, LinkBuffer& linkBuffer, MacroAssembler::Label from, MacroAssembler::Label to)
163{
164 CodeLocationLabel<DisassemblyPtrTag> fromLocation = linkBuffer.locationOf<DisassemblyPtrTag>(from);
165 CodeLocationLabel<DisassemblyPtrTag> toLocation = linkBuffer.locationOf<DisassemblyPtrTag>(to);
166 disassemble(fromLocation, toLocation.dataLocation<uintptr_t>() - fromLocation.dataLocation<uintptr_t>(), " ", out);
167}
168
169} // namespace JSC
170
171#endif // ENABLE(JIT)
172
173