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/*
* Copyright (C) 2019-2024 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 "FileBasedFuzzerAgentBase.h"
#include "CodeBlock.h"
#include "JSCellInlines.h"
#include <wtf/text/MakeString.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
FileBasedFuzzerAgentBase::FileBasedFuzzerAgentBase(VM&)
{
}
String FileBasedFuzzerAgentBase::createLookupKey(const String& sourceFilename, OpcodeID opcodeId, int startLocation, int endLocation)
{
return makeString(sourceFilename, '|',
opcodeNames[opcodeAliasForLookupKey(opcodeId)],
'|', startLocation, '|', endLocation);
}
OpcodeID FileBasedFuzzerAgentBase::opcodeAliasForLookupKey(const OpcodeID& opcodeId)
{
if (opcodeId == op_call_varargs || opcodeId == op_call_direct_eval || opcodeId == op_tail_call || opcodeId == op_tail_call_varargs)
return op_call;
if (opcodeId == op_enumerator_get_by_val || opcodeId == op_get_by_val_with_this)
return op_get_by_val;
if (opcodeId == op_construct_varargs)
return op_construct;
if (opcodeId == op_super_construct_varargs)
return op_super_construct;
return opcodeId;
}
SpeculatedType FileBasedFuzzerAgentBase::getPrediction(CodeBlock* codeBlock, const CodeOrigin& codeOrigin, SpeculatedType original)
{
Locker locker { m_lock };
ScriptExecutable* ownerExecutable = codeBlock->ownerExecutable();
const auto& sourceURL = ownerExecutable->sourceURL();
if (sourceURL.isEmpty())
return original;
PredictionTarget predictionTarget;
BytecodeIndex bytecodeIndex = codeOrigin.bytecodeIndex();
predictionTarget.info = codeBlock->expressionInfoForBytecodeIndex(bytecodeIndex);
Vector<String> urlParts = sourceURL.split('/');
predictionTarget.sourceFilename = urlParts.isEmpty() ? sourceURL : urlParts.last();
const auto& instructions = codeBlock->instructions();
const auto* anInstruction = instructions.at(bytecodeIndex).ptr();
predictionTarget.opcodeId = anInstruction->opcodeID();
int startLocation = predictionTarget.info.divot - predictionTarget.info.startOffset;
int endLocation = predictionTarget.info.divot + predictionTarget.info.endOffset;
predictionTarget.lookupKey = createLookupKey(predictionTarget.sourceFilename, predictionTarget.opcodeId, startLocation, endLocation);
return getPredictionInternal(codeBlock, predictionTarget, original);
}
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
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