1/* 2 * Copyright (C) 2011 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef LLIntExceptions_h 27#define LLIntExceptions_h 28 29#include <wtf/Platform.h> 30#include <wtf/StdLibExtras.h> 31 32#if ENABLE(LLINT) 33 34#include "MacroAssemblerCodeRef.h" 35 36namespace JSC { 37 38class ExecState; 39struct Instruction; 40 41namespace LLInt { 42 43// Throw the currently active exception in the context of the caller's call frame. 44void interpreterThrowInCaller(ExecState* callerFrame, ReturnAddressPtr); 45 46// Tells you where to jump to if you want to return-to-throw, after you've already 47// set up all information needed to throw the exception. 48Instruction* returnToThrowForThrownException(ExecState*); 49 50// Saves the current PC in the global data for safe-keeping, and gives you a PC 51// that you can tell the interpreter to go to, which when advanced between 1 52// and 9 slots will give you an "instruction" that threads to the interpreter's 53// exception handler. Note that if you give it the PC for exception handling, 54// it's smart enough to just return that PC without doing anything else; this 55// lets you thread exception handling through common helper functions used by 56// other helpers. 57Instruction* returnToThrow(ExecState*, Instruction*); 58 59// Use this when you're throwing to a call thunk. 60void* callToThrow(ExecState*, Instruction*); 61 62} } // namespace JSC::LLInt 63 64#endif // ENABLE(LLINT) 65 66#endif // LLIntExceptions_h 67