1/*
2 * Copyright (C) 2016-2018 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#pragma once
27
28#include "DFGCommon.h"
29
30#if ENABLE(FTL_JIT)
31
32#include "CCallHelpers.h"
33#include "FTLOSRExitHandle.h"
34#include <wtf/Box.h>
35#include <wtf/ThreadSafeRefCounted.h>
36
37namespace JSC { namespace FTL {
38
39class State;
40
41class ExceptionTarget : public ThreadSafeRefCounted<ExceptionTarget> {
42public:
43 ~ExceptionTarget();
44
45 // It's OK to call this during linking, but not any sooner.
46 CodeLocationLabel<ExceptionHandlerPtrTag> label(LinkBuffer&);
47
48 // Or, you can get a JumpList at any time. Anything you add to this JumpList will be linked to
49 // the target's label.
50 Box<CCallHelpers::JumpList> jumps(CCallHelpers&);
51
52private:
53 friend class PatchpointExceptionHandle;
54
55 ExceptionTarget(bool isDefaultHandler, Box<CCallHelpers::Label>, RefPtr<OSRExitHandle>);
56
57 bool m_isDefaultHandler;
58 Box<CCallHelpers::Label> m_defaultHandler;
59 RefPtr<OSRExitHandle> m_handle;
60};
61
62} } // namespace JSC::FTL
63
64#endif // ENABLE(FTL_JIT)
65