bytecode/CodeOrigin.cpp

   1 /*
   2  * Copyright (C) 2012, 2013 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 "CodeOrigin.h"
  28
  29 #include "CallFrame.h"
  30 #include "CodeBlock.h"
  31 #include "Executable.h"
  32 #include "Operations.h"
  33
  34 namespace JSC {
  35
  36 unsigned CodeOrigin::inlineDepthForCallFrame(InlineCallFrame* inlineCallFrame)
  37 {
  38     unsigned result = 1;
  39     for (InlineCallFrame* current = inlineCallFrame; current; current = current->caller.inlineCallFrame)
  40         result++;
  41     return result;
  42 }
  43
  44 unsigned CodeOrigin::inlineDepth() const
  45 {
  46     return inlineDepthForCallFrame(inlineCallFrame);
  47 }
  48
  49 Vector<CodeOrigin> CodeOrigin::inlineStack() const
  50 {
  51     Vector<CodeOrigin> result(inlineDepth());
  52     result.last() = *this;
  53     unsigned index = result.size() - 2;
  54     for (InlineCallFrame* current = inlineCallFrame; current; current = current->caller.inlineCallFrame)
  55         result[index--] = current->caller;
  56     RELEASE_ASSERT(!result[0].inlineCallFrame);
  57     return result;
  58 }
  59
  60 void CodeOrigin::dump(PrintStream& out) const
  61 {
  62     Vector<CodeOrigin> stack = inlineStack();
  63     for (unsigned i = 0; i < stack.size(); ++i) {
  64         if (i)
  65             out.print(" --> ");
  66
  67         if (InlineCallFrame* frame = stack[i].inlineCallFrame) {
  68             out.print(frame->briefFunctionInformation(), ":<", RawPointer(frame->executable.get()), "> ");
  69             if (frame->isClosureCall())
  70                 out.print("(closure) ");
  71         }
  72
  73         out.print("bc#", stack[i].bytecodeIndex);
  74     }
  75 }
  76
  77 JSFunction* InlineCallFrame::calleeForCallFrame(ExecState* exec) const
  78 {
  79     if (!isClosureCall())
  80         return callee.get();
  81
  82     return jsCast<JSFunction*>((exec + stackOffset)->callee());
  83 }
  84
  85 CodeBlockHash InlineCallFrame::hash() const
  86 {
  87     return executable->hashFor(specializationKind());
  88 }
  89
  90 String InlineCallFrame::inferredName() const
  91 {
  92     return jsCast<FunctionExecutable*>(executable.get())->inferredName().string();
  93 }
  94
  95 CodeBlock* InlineCallFrame::baselineCodeBlock() const
  96 {
  97     return jsCast<FunctionExecutable*>(executable.get())->baselineCodeBlockFor(specializationKind());
  98 }
  99
 100 void InlineCallFrame::dumpBriefFunctionInformation(PrintStream& out) const
 101 {
 102     out.print(inferredName(), "#", hash());
 103 }
 104
 105 void InlineCallFrame::dump(PrintStream& out) const
 106 {
 107     out.print(briefFunctionInformation(), ":<", RawPointer(executable.get()), ", bc#", caller.bytecodeIndex, ", ", specializationKind());
 108     if (callee)
 109         out.print(", known callee: ", JSValue(callee.get()));
 110     else
 111         out.print(", closure call");
 112     out.print(", numArgs+this = ", arguments.size());
 113     out.print(", stack >= r", stackOffset);
 114     out.print(">");
 115 }
 116
 117 } // namespace JSC
 118