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