JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / jit / JITDisassembler.cpp

diff --git a/jit/JITDisassembler.cpp b/jit/JITDisassembler.cpp
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+/*
+ * Copyright (C) 2012 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 "JITDisassembler.h"
+
+#if ENABLE(JIT)
+
+#include "CodeBlock.h"
+#include "CodeBlockWithJITType.h"
+#include "JIT.h"
+#include <wtf/StringPrintStream.h>
+
+namespace JSC {
+
+JITDisassembler::JITDisassembler(CodeBlock *codeBlock)
+    : m_codeBlock(codeBlock)
+    , m_labelForBytecodeIndexInMainPath(codeBlock->instructionCount())
+    , m_labelForBytecodeIndexInSlowPath(codeBlock->instructionCount())
+{
+}
+
+JITDisassembler::~JITDisassembler()
+{
+}
+
+void JITDisassembler::dump(PrintStream& out, LinkBuffer& linkBuffer)
+{
+    dumpHeader(out, linkBuffer);
+    dumpDisassembly(out, linkBuffer, m_startOfCode, m_labelForBytecodeIndexInMainPath[0]);
+    
+    dumpForInstructions(out, linkBuffer, "    ", m_labelForBytecodeIndexInMainPath, firstSlowLabel());
+    out.print("    (End Of Main Path)\n");
+    dumpForInstructions(out, linkBuffer, "    (S) ", m_labelForBytecodeIndexInSlowPath, m_endOfSlowPath);
+    out.print("    (End Of Slow Path)\n");
+
+    dumpDisassembly(out, linkBuffer, m_endOfSlowPath, m_endOfCode);
+}
+
+void JITDisassembler::dump(LinkBuffer& linkBuffer)
+{
+    dump(WTF::dataFile(), linkBuffer);
+}
+
+void JITDisassembler::reportToProfiler(Profiler::Compilation* compilation, LinkBuffer& linkBuffer)
+{
+    StringPrintStream out;
+    
+    dumpHeader(out, linkBuffer);
+    compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString()));
+    out.reset();
+    dumpDisassembly(out, linkBuffer, m_startOfCode, m_labelForBytecodeIndexInMainPath[0]);
+    compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString()));
+    
+    reportInstructions(compilation, linkBuffer, "    ", m_labelForBytecodeIndexInMainPath, firstSlowLabel());
+    compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), "    (End Of Main Path)\n"));
+    reportInstructions(compilation, linkBuffer, "    (S) ", m_labelForBytecodeIndexInSlowPath, m_endOfSlowPath);
+    compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), "    (End Of Slow Path)\n"));
+    out.reset();
+    dumpDisassembly(out, linkBuffer, m_endOfSlowPath, m_endOfCode);
+    compilation->addDescription(Profiler::CompiledBytecode(Profiler::OriginStack(), out.toCString()));
+}
+
+void JITDisassembler::dumpHeader(PrintStream& out, LinkBuffer& linkBuffer)
+{
+    out.print("Generated Baseline JIT code for ", CodeBlockWithJITType(m_codeBlock, JITCode::BaselineJIT), ", instruction count = ", m_codeBlock->instructionCount(), "\n");
+    out.print("   Source: ", m_codeBlock->sourceCodeOnOneLine(), "\n");
+    out.print("   Code at [", RawPointer(linkBuffer.debugAddress()), ", ", RawPointer(static_cast<char*>(linkBuffer.debugAddress()) + linkBuffer.debugSize()), "):\n");
+}
+
+MacroAssembler::Label JITDisassembler::firstSlowLabel()
+{
+    MacroAssembler::Label firstSlowLabel;
+    for (unsigned i = 0; i < m_labelForBytecodeIndexInSlowPath.size(); ++i) {
+        if (m_labelForBytecodeIndexInSlowPath[i].isSet()) {
+            firstSlowLabel = m_labelForBytecodeIndexInSlowPath[i];
+            break;
+        }
+    }
+    return firstSlowLabel.isSet() ? firstSlowLabel : m_endOfSlowPath;
+}
+
+Vector<JITDisassembler::DumpedOp> JITDisassembler::dumpVectorForInstructions(LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel)
+{
+    StringPrintStream out;
+    Vector<DumpedOp> result;
+    
+    for (unsigned i = 0; i < labels.size();) {
+        if (!labels[i].isSet()) {
+            i++;
+            continue;
+        }
+        out.reset();
+        result.append(DumpedOp());
+        result.last().index = i;
+        out.print(prefix);
+        m_codeBlock->dumpBytecode(out, i);
+        for (unsigned nextIndex = i + 1; ; nextIndex++) {
+            if (nextIndex >= labels.size()) {
+                dumpDisassembly(out, linkBuffer, labels[i], endLabel);
+                result.last().disassembly = out.toCString();
+                return result;
+            }
+            if (labels[nextIndex].isSet()) {
+                dumpDisassembly(out, linkBuffer, labels[i], labels[nextIndex]);
+                result.last().disassembly = out.toCString();
+                i = nextIndex;
+                break;
+            }
+        }
+    }
+    
+    return result;
+}
+
+void JITDisassembler::dumpForInstructions(PrintStream& out, LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel)
+{
+    Vector<DumpedOp> dumpedOps = dumpVectorForInstructions(linkBuffer, prefix, labels, endLabel);
+    
+    for (unsigned i = 0; i < dumpedOps.size(); ++i)
+        out.print(dumpedOps[i].disassembly);
+}
+
+void JITDisassembler::reportInstructions(Profiler::Compilation* compilation, LinkBuffer& linkBuffer, const char* prefix, Vector<MacroAssembler::Label>& labels, MacroAssembler::Label endLabel)
+{
+    Vector<DumpedOp> dumpedOps = dumpVectorForInstructions(linkBuffer, prefix, labels, endLabel);
+    
+    for (unsigned i = 0; i < dumpedOps.size(); ++i) {
+        compilation->addDescription(
+            Profiler::CompiledBytecode(
+                Profiler::OriginStack(Profiler::Origin(compilation->bytecodes(), dumpedOps[i].index)),
+                dumpedOps[i].disassembly));
+    }
+}
+
+void JITDisassembler::dumpDisassembly(PrintStream& out, LinkBuffer& linkBuffer, MacroAssembler::Label from, MacroAssembler::Label to)
+{
+    CodeLocationLabel fromLocation = linkBuffer.locationOf(from);
+    CodeLocationLabel toLocation = linkBuffer.locationOf(to);
+    disassemble(fromLocation, bitwise_cast<uintptr_t>(toLocation.executableAddress()) - bitwise_cast<uintptr_t>(fromLocation.executableAddress()), "        ", out);
+}
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)
+