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8564ccbd MD |
1 | #ifndef _LTTNG_BUG_H |
2 | #define _LTTNG_BUG_H | |
3 | ||
4 | /* | |
5 | * lttng/bug.h | |
6 | * | |
7 | * (C) Copyright 2010-2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
10 | * of this software and associated documentation files (the "Software"), to deal | |
11 | * in the Software without restriction, including without limitation the rights | |
12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
13 | * copies of the Software, and to permit persons to whom the Software is | |
14 | * furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included in | |
17 | * all copies or substantial portions of the Software. | |
18 | */ | |
19 | ||
20 | #include <urcu/compiler.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | ||
24 | #define LTTNG_BUG_ON(condition) \ | |
25 | do { \ | |
26 | if (caa_unlikely(condition)) { \ | |
27 | fprintf(stderr, \ | |
28 | "LTTng BUG in file %s, line %d.\n", \ | |
29 | __FILE__, __LINE__); \ | |
30 | exit(EXIT_FAILURE); \ | |
31 | } \ | |
32 | } while (0) | |
33 | ||
34 | #define LTTNG_BUILD_BUG_ON(condition) \ | |
35 | ((void) sizeof(char[-!!(condition)])) | |
36 | ||
37 | /** | |
38 | * LTTNG_BUILD_RUNTIME_BUG_ON - check condition at build (if constant) or runtime | |
39 | * @condition: the condition which should be false. | |
40 | * | |
41 | * If the condition is a constant and true, the compiler will generate a build | |
42 | * error. If the condition is not constant, a BUG will be triggered at runtime | |
43 | * if the condition is ever true. If the condition is constant and false, no | |
44 | * code is emitted. | |
45 | */ | |
46 | #define LTTNG_BUILD_RUNTIME_BUG_ON(condition) \ | |
47 | do { \ | |
48 | if (__builtin_constant_p(condition)) \ | |
49 | LTTNG_BUILD_BUG_ON(condition); \ | |
50 | else \ | |
51 | LTTNG_BUG_ON(condition); \ | |
52 | } while (0) | |
53 | ||
54 | #endif |