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JITExceptions.cpp
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executable file
·106 lines (88 loc) · 3.64 KB
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/*
* Copyright (C) 2012 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 "CallFrameInlines.h"
#include "CodeBlock.h"
#include "Interpreter.h"
#include "JSCJSValue.h"
#include "VM.h"
#include "Operations.h"
#if ENABLE(JIT) || ENABLE(LLINT)
namespace JSC {
static unsigned getExceptionLocation(VM* vm, CallFrame* callFrame)
{
UNUSED_PARAM(vm);
ASSERT(!callFrame->hasHostCallFrameFlag());
#if ENABLE(DFG_JIT)
if (callFrame->hasLocationAsCodeOriginIndex())
return callFrame->bytecodeOffsetFromCodeOriginIndex();
#endif
return callFrame->locationAsBytecodeOffset();
}
#if USE(JSVALUE32_64)
EncodedExceptionHandler encode(ExceptionHandler handler)
{
ExceptionHandlerUnion u;
u.handler = handler;
return u.encodedHandler;
}
#endif
ExceptionHandler uncaughtExceptionHandler()
{
void* catchRoutine = FunctionPtr(LLInt::getCodePtr(ctiOpThrowNotCaught)).value();
ExceptionHandler exceptionHandler = { 0, catchRoutine};
return exceptionHandler;
}
ExceptionHandler genericThrow(VM* vm, ExecState* callFrame, JSValue exceptionValue, unsigned vPCIndex)
{
RELEASE_ASSERT(exceptionValue);
HandlerInfo* handler = vm->interpreter->unwind(callFrame, exceptionValue, vPCIndex); // This may update callFrame.
void* catchRoutine;
Instruction* catchPCForInterpreter = 0;
if (handler) {
catchPCForInterpreter = &callFrame->codeBlock()->instructions()[handler->target];
catchRoutine = ExecutableBase::catchRoutineFor(handler, catchPCForInterpreter);
} else
catchRoutine = FunctionPtr(LLInt::getCodePtr(ctiOpThrowNotCaught)).value();
vm->callFrameForThrow = callFrame;
vm->targetMachinePCForThrow = catchRoutine;
vm->targetInterpreterPCForThrow = catchPCForInterpreter;
RELEASE_ASSERT(catchRoutine);
ExceptionHandler exceptionHandler = { callFrame, catchRoutine};
return exceptionHandler;
}
ExceptionHandler jitThrowNew(VM* vm, ExecState* callFrame, JSValue exceptionValue)
{
unsigned bytecodeOffset = getExceptionLocation(vm, callFrame);
return genericThrow(vm, callFrame, exceptionValue, bytecodeOffset);
}
ExceptionHandler jitThrow(VM* vm, ExecState* callFrame, JSValue exceptionValue, ReturnAddressPtr faultLocation)
{
return genericThrow(vm, callFrame, exceptionValue, callFrame->codeBlock()->bytecodeOffset(callFrame, faultLocation));
}
}
#endif