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Copy pathJITExceptions.cpp
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93 lines (82 loc) · 3.9 KB
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/*
* Copyright (C) 2012-2019 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 "JITExceptions.h"
#include "CallFrame.h"
#include "CatchScope.h"
#include "CodeBlock.h"
#include "Interpreter.h"
#include "JSCJSValueInlines.h"
#include "LLIntData.h"
#include "LLIntExceptions.h"
#include "Opcode.h"
#include "ShadowChicken.h"
#include "VMInlines.h"
namespace JSC {
void genericUnwind(VM& vm, CallFrame* callFrame)
{
auto scope = DECLARE_CATCH_SCOPE(vm);
CallFrame* topJSCallFrame = vm.topJSCallFrame();
if (UNLIKELY(Options::breakOnThrow())) {
CodeBlock* codeBlock = topJSCallFrame->codeBlock();
dataLog("In call frame ", RawPointer(topJSCallFrame), " for code block ", codeBlock, "\n");
WTFBreakpointTrap();
}
if (auto* shadowChicken = vm.shadowChicken())
shadowChicken->log(vm, topJSCallFrame, ShadowChicken::Packet::throwPacket());
Exception* exception = scope.exception();
RELEASE_ASSERT(exception);
HandlerInfo* handler = vm.interpreter->unwind(vm, callFrame, exception); // This may update callFrame.
void* catchRoutine;
const Instruction* catchPCForInterpreter = nullptr;
if (handler) {
// handler->target is meaningless for getting a code offset when catching
// the exception in a DFG/FTL frame. This bytecode target offset could be
// something that's in an inlined frame, which means an array access
// with this bytecode offset in the machine frame is utterly meaningless
// and can cause an overflow. OSR exit properly exits to handler->target
// in the proper frame.
if (!JITCode::isOptimizingJIT(callFrame->codeBlock()->jitType()))
catchPCForInterpreter = callFrame->codeBlock()->instructions().at(handler->target).ptr();
#if ENABLE(JIT)
catchRoutine = handler->nativeCode.executableAddress();
#else
if (catchPCForInterpreter->isWide32())
catchRoutine = LLInt::getWide32CodePtr(catchPCForInterpreter->opcodeID());
else if (catchPCForInterpreter->isWide16())
catchRoutine = LLInt::getWide16CodePtr(catchPCForInterpreter->opcodeID());
else
catchRoutine = LLInt::getCodePtr(catchPCForInterpreter->opcodeID());
#endif
} else
catchRoutine = LLInt::handleUncaughtException(vm).code().executableAddress();
ASSERT(bitwise_cast<uintptr_t>(callFrame) < bitwise_cast<uintptr_t>(vm.topEntryFrame));
assertIsTaggedWith<ExceptionHandlerPtrTag>(catchRoutine);
vm.callFrameForCatch = callFrame;
vm.targetMachinePCForThrow = catchRoutine;
vm.targetInterpreterPCForThrow = catchPCForInterpreter;
RELEASE_ASSERT(catchRoutine);
}
} // namespace JSC