1/*
2 * Copyright (C) 2013 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 DFGOSRExitBase_h
27#define DFGOSRExitBase_h
28
29#if ENABLE(DFG_JIT)
30
31#include "CodeOrigin.h"
32#include "DFGExitProfile.h"
33
34namespace JSC { namespace DFG {
35
36struct BasicBlock;
37struct Node;
38
39// Provides for the OSR exit profiling functionality that is common between the DFG
40// and the FTL.
41
42struct OSRExitBase {
43    OSRExitBase(ExitKind kind, CodeOrigin origin, CodeOrigin originForProfile)
44        : m_kind(kind)
45        , m_count(0)
46        , m_codeOrigin(origin)
47        , m_codeOriginForExitProfile(originForProfile)
48    {
49        ASSERT(m_codeOrigin.isSet());
50        ASSERT(m_codeOriginForExitProfile.isSet());
51    }
52
53    ExitKind m_kind;
54    uint32_t m_count;
55
56    CodeOrigin m_codeOrigin;
57    CodeOrigin m_codeOriginForExitProfile;
58
59protected:
60    bool considerAddingAsFrequentExitSite(CodeBlock* profiledCodeBlock, ExitingJITType jitType)
61    {
62        if (!m_count)
63            return false;
64        return considerAddingAsFrequentExitSiteSlow(profiledCodeBlock, jitType);
65    }
66
67private:
68    bool considerAddingAsFrequentExitSiteSlow(CodeBlock* profiledCodeBlock, ExitingJITType);
69};
70
71} } // namespace JSC::DFG
72
73#endif // ENABLE(DFG_JIT)
74
75#endif // DFGOSRExitBase_h
76
77