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1 /* | |
2 * Copyright (C) 2011 Google 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 are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Neither the name of Google Inc. nor the names of its | |
11 * contributors may be used to endorse or promote products derived from | |
12 * this software without specific prior written permission. | |
13 * | |
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
25 */ | |
26 | |
27 #ifndef WTF_DynamicAnnotations_h | |
28 #define WTF_DynamicAnnotations_h | |
29 | |
30 /* This file defines dynamic annotations for use with dynamic analysis | |
31 * tool such as ThreadSanitizer, Valgrind, etc. | |
32 * | |
33 * Dynamic annotation is a source code annotation that affects | |
34 * the generated code (that is, the annotation is not a comment). | |
35 * Each such annotation is attached to a particular | |
36 * instruction and/or to a particular object (address) in the program. | |
37 * | |
38 * By using dynamic annotations a developer can give more details to the dynamic | |
39 * analysis tool to improve its precision. | |
40 * | |
41 * In C/C++ program the annotations are represented as C macros. | |
42 * With the default build flags, these macros are empty, hence don't affect | |
43 * performance of a compiled binary. | |
44 * If dynamic annotations are enabled, they just call no-op functions. | |
45 * The dynamic analysis tools can intercept these functions and replace them | |
46 * with their own implementations. | |
47 * | |
48 * See http://code.google.com/p/data-race-test/wiki/DynamicAnnotations for more
information. | |
49 */ | |
50 | |
51 #if USE(DYNAMIC_ANNOTATIONS) | |
52 /* Tell data race detector that we're not interested in reports on the given add
ress range. */ | |
53 #define WTF_ANNOTATE_BENIGN_RACE_SIZED(address, size, description) WTFAnnotateBe
nignRaceSized(__FILE__, __LINE__, address, size, description) | |
54 #define WTF_ANNOTATE_BENIGN_RACE(pointer, description) WTFAnnotateBenignRaceSize
d(__FILE__, __LINE__, pointer, sizeof(*(pointer)), description) | |
55 | |
56 /* Annotations for user-defined synchronization mechanisms. | |
57 * These annotations can be used to define happens-before arcs in user-defined | |
58 * synchronization mechanisms: the race detector will infer an arc from | |
59 * the former to the latter when they share the same argument pointer. | |
60 * | |
61 * The most common case requiring annotations is atomic reference counting: | |
62 * bool deref() { | |
63 * ANNOTATE_HAPPENS_BEFORE(&m_refCount); | |
64 * if (!atomicDecrement(&m_refCount)) { | |
65 * // m_refCount is now 0 | |
66 * ANNOTATE_HAPPENS_AFTER(&m_refCount); | |
67 * // "return true; happens-after each atomicDecrement of m_refCount" | |
68 * return true; | |
69 * } | |
70 * return false; | |
71 * } | |
72 */ | |
73 #define WTF_ANNOTATE_HAPPENS_BEFORE(address) WTFAnnotateHappensBefore(__FILE__,
__LINE__, address) | |
74 #define WTF_ANNOTATE_HAPPENS_AFTER(address) WTFAnnotateHappensAfter(__FILE__, __
LINE__, address) | |
75 | |
76 #ifdef __cplusplus | |
77 extern "C" { | |
78 #endif | |
79 /* Don't use these directly, use the above macros instead. */ | |
80 void WTFAnnotateBenignRaceSized(const char* file, int line, const volatile void*
memory, long size, const char* description); | |
81 void WTFAnnotateHappensBefore(const char* file, int line, const volatile void* a
ddress); | |
82 void WTFAnnotateHappensAfter(const char* file, int line, const volatile void* ad
dress); | |
83 #ifdef __cplusplus | |
84 } // extern "C" | |
85 #endif | |
86 | |
87 #else // USE(DYNAMIC_ANNOTATIONS) | |
88 /* These macros are empty when dynamic annotations are not enabled so you can | |
89 * use them without affecting the performance of release binaries. */ | |
90 #define WTF_ANNOTATE_BENIGN_RACE_SIZED(address, size, description) | |
91 #define WTF_ANNOTATE_BENIGN_RACE(pointer, description) | |
92 #define WTF_ANNOTATE_HAPPENS_BEFORE(address) | |
93 #define WTF_ANNOTATE_HAPPENS_AFTER(address) | |
94 #endif // USE(DYNAMIC_ANNOTATIONS) | |
95 | |
96 #endif // WTF_DynamicAnnotations_h | |
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