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