profiler/ProfilerBytecodeSequence.cpp

   1 /*
   2  * Copyright (C) 2012, 2013, 2014 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 "ProfilerBytecodeSequence.h"
  28
  29 #include "CodeBlock.h"
  30 #include "JSGlobalObject.h"
  31 #include "Operands.h"
  32 #include "JSCInlines.h"
  33 #include <wtf/StringPrintStream.h>
  34
  35 namespace JSC { namespace Profiler {
  36
  37 BytecodeSequence::BytecodeSequence(CodeBlock* codeBlock)
  38 {
  39     StringPrintStream out;
  40
  41     for (unsigned i = 0; i < codeBlock->numberOfArgumentValueProfiles(); ++i) {
  42         ConcurrentJITLocker locker(codeBlock->m_lock);
  43         CString description = codeBlock->valueProfileForArgument(i)->briefDescription(locker);
  44         if (!description.length())
  45             continue;
  46         out.reset();
  47         out.print("arg", i, " (r", virtualRegisterForArgument(i).offset(), "): ", description);
  48         m_header.append(out.toCString());
  49     }
  50
  51     StubInfoMap stubInfos;
  52     codeBlock->getStubInfoMap(stubInfos);
  53
  54     for (unsigned bytecodeIndex = 0; bytecodeIndex < codeBlock->instructions().size();) {
  55         out.reset();
  56         codeBlock->dumpBytecode(out, bytecodeIndex, stubInfos);
  57         m_sequence.append(Bytecode(bytecodeIndex, codeBlock->vm()->interpreter->getOpcodeID(codeBlock->instructions()[bytecodeIndex].u.opcode), out.toCString()));
  58         bytecodeIndex += opcodeLength(
  59             codeBlock->vm()->interpreter->getOpcodeID(
  60                 codeBlock->instructions()[bytecodeIndex].u.opcode));
  61     }
  62 }
  63
  64 BytecodeSequence::~BytecodeSequence()
  65 {
  66 }
  67
  68 unsigned BytecodeSequence::indexForBytecodeIndex(unsigned bytecodeIndex) const
  69 {
  70     return binarySearch<Bytecode, unsigned>(m_sequence, m_sequence.size(), bytecodeIndex, getBytecodeIndexForBytecode) - m_sequence.begin();
  71 }
  72
  73 const Bytecode& BytecodeSequence::forBytecodeIndex(unsigned bytecodeIndex) const
  74 {
  75     return at(indexForBytecodeIndex(bytecodeIndex));
  76 }
  77
  78 void BytecodeSequence::addSequenceProperties(ExecState* exec, JSObject* result) const
  79 {
  80     JSArray* header = constructEmptyArray(exec, 0);
  81     for (unsigned i = 0; i < m_header.size(); ++i)
  82         header->putDirectIndex(exec, i, jsString(exec, String::fromUTF8(m_header[i])));
  83     result->putDirect(exec->vm(), exec->propertyNames().header, header);
  84
  85     JSArray* sequence = constructEmptyArray(exec, 0);
  86     for (unsigned i = 0; i < m_sequence.size(); ++i)
  87         sequence->putDirectIndex(exec, i, m_sequence[i].toJS(exec));
  88     result->putDirect(exec->vm(), exec->propertyNames().bytecode, sequence);
  89 }
  90
  91 } } // namespace JSC::Profiler
  92