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/*
* Copyright (C) 2008, 2013 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 "CallFrame.h"
#include "CallFrameInlines.h"
#include "CodeBlock.h"
#include "Interpreter.h"
#include "Operations.h"
#include "VMEntryScope.h"
namespace JSC {
#ifndef NDEBUG
JSStack* CallFrame::stack()
{
return &interpreter()->stack();
}
#endif
#if USE(JSVALUE32_64)
unsigned CallFrame::locationAsBytecodeOffset() const
{
ASSERT(codeBlock());
ASSERT(hasLocationAsBytecodeOffset());
return currentVPC() - codeBlock()->instructions().begin();
}
void CallFrame::setLocationAsBytecodeOffset(unsigned offset)
{
ASSERT(codeBlock());
setCurrentVPC(codeBlock()->instructions().begin() + offset);
ASSERT(hasLocationAsBytecodeOffset());
}
#else
Instruction* CallFrame::currentVPC() const
{
return codeBlock()->instructions().begin() + locationAsBytecodeOffset();
}
void CallFrame::setCurrentVPC(Instruction* vpc)
{
setLocationAsBytecodeOffset(vpc - codeBlock()->instructions().begin());
}
#endif
#if ENABLE(DFG_JIT)
unsigned CallFrame::bytecodeOffsetFromCodeOriginIndex()
{
ASSERT(hasLocationAsCodeOriginIndex());
CodeBlock* codeBlock = this->codeBlock();
ASSERT(codeBlock);
CodeOrigin codeOrigin;
unsigned index = locationAsCodeOriginIndex();
ASSERT(codeBlock->canGetCodeOrigin(index));
codeOrigin = codeBlock->codeOrigin(index);
for (InlineCallFrame* inlineCallFrame = codeOrigin.inlineCallFrame; inlineCallFrame;) {
if (inlineCallFrame->baselineCodeBlock() == codeBlock)
return codeOrigin.bytecodeIndex;
codeOrigin = inlineCallFrame->caller;
inlineCallFrame = codeOrigin.inlineCallFrame;
}
return codeOrigin.bytecodeIndex;
}
#endif // ENABLE(DFG_JIT)
unsigned CallFrame::bytecodeOffset()
{
if (!codeBlock())
return 0;
#if ENABLE(DFG_JIT)
if (hasLocationAsCodeOriginIndex())
return bytecodeOffsetFromCodeOriginIndex();
#endif
return locationAsBytecodeOffset();
}
CodeOrigin CallFrame::codeOrigin()
{
if (!codeBlock())
return CodeOrigin(0);
#if ENABLE(DFG_JIT)
if (hasLocationAsCodeOriginIndex()) {
unsigned index = locationAsCodeOriginIndex();
ASSERT(codeBlock()->canGetCodeOrigin(index));
return codeBlock()->codeOrigin(index);
}
#endif
return CodeOrigin(locationAsBytecodeOffset());
}
Register* CallFrame::frameExtentInternal()
{
CodeBlock* codeBlock = this->codeBlock();
ASSERT(codeBlock);
return registers() + virtualRegisterForLocal(codeBlock->frameRegisterCount()).offset();
}
JSGlobalObject* CallFrame::vmEntryGlobalObject()
{
if (this == lexicalGlobalObject()->globalExec())
return lexicalGlobalObject();
// For any ExecState that's not a globalExec, the
// dynamic global object must be set since code is running
ASSERT(vm().entryScope);
return vm().entryScope->globalObject();
}
} // namespace JSC
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