mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
94 lines
3.9 KiB
C++
94 lines
3.9 KiB
C++
/*
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* Copyright (C) 2012-2019 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 "JITExceptions.h"
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#include "CallFrame.h"
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#include "CatchScope.h"
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#include "CodeBlock.h"
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#include "Interpreter.h"
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#include "JSCJSValueInlines.h"
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#include "LLIntData.h"
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#include "LLIntExceptions.h"
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#include "Opcode.h"
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#include "ShadowChicken.h"
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#include "VMInlines.h"
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namespace JSC {
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void genericUnwind(VM& vm, CallFrame* callFrame)
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{
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auto scope = DECLARE_CATCH_SCOPE(vm);
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CallFrame* topJSCallFrame = vm.topJSCallFrame();
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if (UNLIKELY(Options::breakOnThrow())) {
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CodeBlock* codeBlock = topJSCallFrame->codeBlock();
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dataLog("In call frame ", RawPointer(topJSCallFrame), " for code block ", codeBlock, "\n");
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WTFBreakpointTrap();
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}
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if (auto* shadowChicken = vm.shadowChicken())
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shadowChicken->log(vm, topJSCallFrame, ShadowChicken::Packet::throwPacket());
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Exception* exception = scope.exception();
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RELEASE_ASSERT(exception);
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HandlerInfo* handler = vm.interpreter->unwind(vm, callFrame, exception); // This may update callFrame.
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void* catchRoutine;
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const Instruction* catchPCForInterpreter = nullptr;
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if (handler) {
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// handler->target is meaningless for getting a code offset when catching
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// the exception in a DFG/FTL frame. This bytecode target offset could be
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// something that's in an inlined frame, which means an array access
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// with this bytecode offset in the machine frame is utterly meaningless
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// and can cause an overflow. OSR exit properly exits to handler->target
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// in the proper frame.
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if (!JITCode::isOptimizingJIT(callFrame->codeBlock()->jitType()))
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catchPCForInterpreter = callFrame->codeBlock()->instructions().at(handler->target).ptr();
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#if ENABLE(JIT)
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catchRoutine = handler->nativeCode.executableAddress();
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#else
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if (catchPCForInterpreter->isWide32())
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catchRoutine = LLInt::getWide32CodePtr(catchPCForInterpreter->opcodeID());
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else if (catchPCForInterpreter->isWide16())
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catchRoutine = LLInt::getWide16CodePtr(catchPCForInterpreter->opcodeID());
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else
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catchRoutine = LLInt::getCodePtr(catchPCForInterpreter->opcodeID());
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#endif
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} else
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catchRoutine = LLInt::handleUncaughtException(vm).code().executableAddress();
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ASSERT(bitwise_cast<uintptr_t>(callFrame) < bitwise_cast<uintptr_t>(vm.topEntryFrame));
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assertIsTaggedWith<ExceptionHandlerPtrTag>(catchRoutine);
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vm.callFrameForCatch = callFrame;
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vm.targetMachinePCForThrow = catchRoutine;
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vm.targetInterpreterPCForThrow = catchPCForInterpreter;
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RELEASE_ASSERT(catchRoutine);
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}
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} // namespace JSC
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