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/*
* Copyright (C) 2012-2023 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->isNativeCalleeFrame() ? nullptr : 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);
CatchInfo handler = vm.interpreter.unwind(vm, callFrame, exception); // This may update callFrame.
void* catchRoutine = nullptr;
void* dispatchAndCatchRoutine = nullptr;
JSOrWasmInstruction catchPCForInterpreter = { static_cast<JSInstruction*>(nullptr) };
uintptr_t catchMetadataPCForInterpreter = 0;
uint32_t tryDepthForThrow = 0;
if (handler.m_valid) {
catchPCForInterpreter = handler.m_catchPCForInterpreter;
catchMetadataPCForInterpreter = handler.m_catchMetadataPCForInterpreter;
tryDepthForThrow = handler.m_tryDepthForThrow;
#if ENABLE(JIT)
catchRoutine = handler.m_nativeCode.taggedPtr();
if (handler.m_nativeCodeForDispatchAndCatch)
dispatchAndCatchRoutine = handler.m_nativeCodeForDispatchAndCatch.taggedPtr();
#else
auto getCatchRoutine = [](const auto* pc) {
if (pc->isWide32())
return LLInt::getWide32CodePtr(pc->opcodeID());
if (pc->isWide16())
return LLInt::getWide16CodePtr(pc->opcodeID());
return LLInt::getCodePtr(pc->opcodeID());
};
ASSERT_WITH_MESSAGE(!std::holds_alternative<uintptr_t>(catchPCForInterpreter), "IPInt does not support no JIT");
catchRoutine = std::holds_alternative<const JSInstruction*>(catchPCForInterpreter)
? getCatchRoutine(std::get<const JSInstruction*>(catchPCForInterpreter))
: getCatchRoutine(std::get<const WasmInstruction*>(catchPCForInterpreter));
#endif
} else
catchRoutine = LLInt::handleUncaughtException(vm).code().taggedPtr();
ASSERT(std::bit_cast<uintptr_t>(callFrame) < std::bit_cast<uintptr_t>(vm.topEntryFrame));
assertIsTaggedWith<ExceptionHandlerPtrTag>(catchRoutine);
vm.callFrameForCatch = callFrame;
vm.targetMachinePCForThrow = catchRoutine;
vm.targetMachinePCAfterCatch = dispatchAndCatchRoutine;
vm.targetInterpreterPCForThrow = catchPCForInterpreter;
vm.targetInterpreterMetadataPCForThrow = catchMetadataPCForInterpreter;
vm.targetTryDepthForThrow = tryDepthForThrow;
RELEASE_ASSERT(catchRoutine);
}
} // namespace JSC
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