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/*
* Copyright (C) 2012 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 "ResolveGlobalStatus.h"
#include "CodeBlock.h"
#include "JSValue.h"
#include "Structure.h"
namespace JSC {
#if ENABLE(LLINT) || ENABLE(JIT)
static ResolveGlobalStatus computeForStructure(CodeBlock* codeBlock, Structure* structure, Identifier& identifier)
{
unsigned attributesIgnored;
JSCell* specificValue;
PropertyOffset offset = structure->get(
*codeBlock->globalData(), identifier, attributesIgnored, specificValue);
if (!isValidOffset(offset))
return ResolveGlobalStatus();
return ResolveGlobalStatus(ResolveGlobalStatus::Simple, structure, offset, specificValue);
}
#endif // ENABLE(LLINT) || ENABLE(JIT)
static ResolveGlobalStatus computeForLLInt(CodeBlock* codeBlock, unsigned bytecodeIndex, Identifier& identifier)
{
#if ENABLE(LLINT)
Instruction* instruction = codeBlock->instructions().begin() + bytecodeIndex;
ASSERT(instruction[0].u.opcode == llint_op_resolve_global);
Structure* structure = instruction[3].u.structure.get();
if (!structure)
return ResolveGlobalStatus();
return computeForStructure(codeBlock, structure, identifier);
#else
UNUSED_PARAM(codeBlock);
UNUSED_PARAM(bytecodeIndex);
UNUSED_PARAM(identifier);
return ResolveGlobalStatus();
#endif
}
ResolveGlobalStatus ResolveGlobalStatus::computeFor(CodeBlock* codeBlock, unsigned bytecodeIndex, Identifier& identifier)
{
#if ENABLE(JIT) && ENABLE(VALUE_PROFILER)
if (!codeBlock->numberOfGlobalResolveInfos())
return computeForLLInt(codeBlock, bytecodeIndex, identifier);
if (codeBlock->likelyToTakeSlowCase(bytecodeIndex))
return ResolveGlobalStatus(TakesSlowPath);
GlobalResolveInfo& globalResolveInfo = codeBlock->globalResolveInfoForBytecodeOffset(bytecodeIndex);
if (!globalResolveInfo.structure)
return computeForLLInt(codeBlock, bytecodeIndex, identifier);
return computeForStructure(codeBlock, globalResolveInfo.structure.get(), identifier);
#else
return computeForLLInt(codeBlock, bytecodeIndex, identifier);
#endif
}
} // namespace JSC
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