mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
94 lines
3.8 KiB
C++
94 lines
3.8 KiB
C++
/*
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* Copyright (C) 2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "FileBasedFuzzerAgentBase.h"
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#include "CodeBlock.h"
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#include <wtf/text/StringBuilder.h>
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#ifdef DARLING
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#include "JSCellInlines.h"
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#include "HeapCellInlines.h"
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#endif
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namespace JSC {
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FileBasedFuzzerAgentBase::FileBasedFuzzerAgentBase(VM&)
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{
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}
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String FileBasedFuzzerAgentBase::createLookupKey(const String& sourceFilename, OpcodeID opcodeId, int startLocation, int endLocation)
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{
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StringBuilder lookupKey;
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lookupKey.append(sourceFilename);
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lookupKey.append("|");
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lookupKey.append(opcodeNames[opcodeAliasForLookupKey(opcodeId)]);
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lookupKey.append("|");
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lookupKey.append(startLocation);
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lookupKey.append("|");
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lookupKey.append(endLocation);
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return lookupKey.toString();
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}
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OpcodeID FileBasedFuzzerAgentBase::opcodeAliasForLookupKey(const OpcodeID& opcodeId)
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{
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if (opcodeId == op_call_varargs || opcodeId == op_call_eval || opcodeId == op_tail_call || opcodeId == op_tail_call_varargs)
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return op_call;
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if (opcodeId == op_get_direct_pname || opcodeId == op_get_by_val_with_this)
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return op_get_by_val;
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if (opcodeId == op_construct_varargs)
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return op_construct;
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return opcodeId;
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}
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SpeculatedType FileBasedFuzzerAgentBase::getPrediction(CodeBlock* codeBlock, const CodeOrigin& codeOrigin, SpeculatedType original)
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{
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auto locker = holdLock(m_lock);
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ScriptExecutable* ownerExecutable = codeBlock->ownerExecutable();
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const auto& sourceURL = ownerExecutable->sourceURL();
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if (sourceURL.isEmpty())
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return original;
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PredictionTarget predictionTarget;
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BytecodeIndex bytecodeIndex = codeOrigin.bytecodeIndex();
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codeBlock->expressionRangeForBytecodeIndex(bytecodeIndex, predictionTarget.divot, predictionTarget.startOffset, predictionTarget.endOffset, predictionTarget.line, predictionTarget.column);
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Vector<String> urlParts = sourceURL.split('/');
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predictionTarget.sourceFilename = urlParts.isEmpty() ? sourceURL : urlParts.last();
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const InstructionStream& instructions = codeBlock->instructions();
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const Instruction* anInstruction = instructions.at(bytecodeIndex).ptr();
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predictionTarget.opcodeId = anInstruction->opcodeID();
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int startLocation = predictionTarget.divot - predictionTarget.startOffset;
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int endLocation = predictionTarget.divot + predictionTarget.endOffset;
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predictionTarget.lookupKey = createLookupKey(predictionTarget.sourceFilename, predictionTarget.opcodeId, startLocation, endLocation);
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return getPredictionInternal(codeBlock, predictionTarget, original);
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}
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} // namespace JSC
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