profiler/ProfilerBytecodeSequence.cpp

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