profiler/ProfilerOriginStack.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 "ProfilerOriginStack.h"
  28
  29 #include "CodeOrigin.h"
  30 #include "JSGlobalObject.h"
  31 #include "JSCInlines.h"
  32 #include "ProfilerDatabase.h"
  33
  34 namespace JSC { namespace Profiler {
  35
  36 OriginStack::OriginStack(WTF::HashTableDeletedValueType)
  37 {
  38     m_stack.append(Origin(WTF::HashTableDeletedValue));
  39 }
  40
  41 OriginStack::OriginStack(const Origin& origin)
  42 {
  43     m_stack.append(origin);
  44 }
  45
  46 OriginStack::OriginStack(Database& database, CodeBlock* codeBlock, const CodeOrigin& codeOrigin)
  47 {
  48     Vector<CodeOrigin> stack = codeOrigin.inlineStack();
  49
  50     append(Origin(database, codeBlock, stack[0].bytecodeIndex));
  51
  52     for (unsigned i = 1; i < stack.size(); ++i) {
  53         append(Origin(
  54             database.ensureBytecodesFor(stack[i].inlineCallFrame->baselineCodeBlock()),
  55             stack[i].bytecodeIndex));
  56     }
  57 }
  58
  59 OriginStack::~OriginStack() { }
  60
  61 void OriginStack::append(const Origin& origin)
  62 {
  63     m_stack.append(origin);
  64 }
  65
  66 bool OriginStack::operator==(const OriginStack& other) const
  67 {
  68     if (m_stack.size() != other.m_stack.size())
  69         return false;
  70
  71     for (unsigned i = m_stack.size(); i--;) {
  72         if (m_stack[i] != other.m_stack[i])
  73             return false;
  74     }
  75
  76     return true;
  77 }
  78
  79 unsigned OriginStack::hash() const
  80 {
  81     unsigned result = m_stack.size();
  82
  83     for (unsigned i = m_stack.size(); i--;) {
  84         result *= 3;
  85         result += m_stack[i].hash();
  86     }
  87
  88     return result;
  89 }
  90
  91 void OriginStack::dump(PrintStream& out) const
  92 {
  93     for (unsigned i = 0; i < m_stack.size(); ++i) {
  94         if (i)
  95             out.print(" --> ");
  96         out.print(m_stack[i]);
  97     }
  98 }
  99
 100 JSValue OriginStack::toJS(ExecState* exec) const
 101 {
 102     JSArray* result = constructEmptyArray(exec, 0);
 103
 104     for (unsigned i = 0; i < m_stack.size(); ++i)
 105         result->putDirectIndex(exec, i, m_stack[i].toJS(exec));
 106
 107     return result;
 108 }
 109
 110 } } // namespace JSC::Profiler
 111