1/*
2 * Copyright (C) 2012 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 CodeProfiling_h
27#define CodeProfiling_h
28
29namespace WTF {
30
31class MetaAllocator;
32class MetaAllocatorTracker;
33
34}
35
36namespace JSC {
37
38class CodeProfile;
39class SourceCode;
40
41class CodeProfiling {
42    enum Mode {
43        Disabled,
44        Enabled,
45        Verbose,
46        VeryVerbose
47    };
48
49public:
50    CodeProfiling(const SourceCode& source)
51        : m_active(enabled())
52    {
53        if (m_active)
54            begin(source);
55    }
56
57    ~CodeProfiling()
58    {
59        if (m_active)
60            end();
61    }
62
63    static bool enabled() { return s_mode != Disabled; }
64    static bool beVerbose() { return s_mode >= Verbose; }
65    static bool beVeryVerbose() { return s_mode >= VeryVerbose; }
66
67    static void notifyAllocator(WTF::MetaAllocator*);
68    static void* getOwnerUIDForPC(void*);
69    static void sample(void* pc, void** framePointer);
70
71private:
72    void begin(const SourceCode&);
73    void end();
74
75    bool m_active;
76
77    static Mode s_mode;
78    static WTF::MetaAllocatorTracker* s_tracker;
79    static volatile CodeProfile* s_profileStack;
80};
81
82}
83
84#endif // CodeProfiling_h
85
86