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1 | #ifndef TRACE_H |
2 | #define TRACE_H | |
3 | ||
4 | #include "git-compat-util.h" | |
5 | #include "strbuf.h" | |
6 | ||
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7 | struct trace_key { |
8 | const char * const key; | |
9 | int fd; | |
10 | unsigned int initialized : 1; | |
11 | unsigned int need_close : 1; | |
12 | }; | |
13 | ||
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14 | extern struct trace_key trace_default_key; |
15 | ||
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16 | #define TRACE_KEY_INIT(name) { "GIT_TRACE_" #name, 0, 0, 0 } |
17 | ||
5991a55c | 18 | extern void trace_repo_setup(const char *prefix); |
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19 | extern int trace_want(struct trace_key *key); |
20 | extern void trace_disable(struct trace_key *key); | |
148d6771 | 21 | extern uint64_t getnanotime(void); |
578da039 | 22 | extern void trace_command_performance(const char **argv); |
32359838 | 23 | extern void trace_verbatim(struct trace_key *key, const void *buf, unsigned len); |
66f66c59 | 24 | |
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25 | #ifndef HAVE_VARIADIC_MACROS |
26 | ||
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27 | __attribute__((format (printf, 1, 2))) |
28 | extern void trace_printf(const char *format, ...); | |
29 | ||
5991a55c | 30 | __attribute__((format (printf, 2, 3))) |
6aa30857 | 31 | extern void trace_printf_key(struct trace_key *key, const char *format, ...); |
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32 | |
33 | __attribute__((format (printf, 2, 3))) | |
34 | extern void trace_argv_printf(const char **argv, const char *format, ...); | |
35 | ||
c69dfd24 | 36 | extern void trace_strbuf(struct trace_key *key, const struct strbuf *data); |
5991a55c | 37 | |
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38 | /* Prints elapsed time (in nanoseconds) if GIT_TRACE_PERFORMANCE is enabled. */ |
39 | __attribute__((format (printf, 2, 3))) | |
40 | extern void trace_performance(uint64_t nanos, const char *format, ...); | |
41 | ||
42 | /* Prints elapsed time since 'start' if GIT_TRACE_PERFORMANCE is enabled. */ | |
43 | __attribute__((format (printf, 2, 3))) | |
44 | extern void trace_performance_since(uint64_t start, const char *format, ...); | |
45 | ||
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46 | #else |
47 | ||
48 | /* | |
49 | * Macros to add file:line - see above for C-style declarations of how these | |
50 | * should be used. | |
51 | */ | |
52 | ||
53 | /* | |
54 | * TRACE_CONTEXT may be set to __FUNCTION__ if the compiler supports it. The | |
55 | * default is __FILE__, as it is consistent with assert(), and static function | |
56 | * names are not necessarily unique. | |
57 | * | |
58 | * __FILE__ ":" __FUNCTION__ doesn't work with GNUC, as __FILE__ is supplied | |
59 | * by the preprocessor as a string literal, and __FUNCTION__ is filled in by | |
60 | * the compiler as a string constant. | |
61 | */ | |
62 | #ifndef TRACE_CONTEXT | |
63 | # define TRACE_CONTEXT __FILE__ | |
64 | #endif | |
65 | ||
66 | /* | |
67 | * Note: with C99 variadic macros, __VA_ARGS__ must include the last fixed | |
68 | * parameter ('format' in this case). Otherwise, a call without variable | |
69 | * arguments will have a surplus ','. E.g.: | |
70 | * | |
71 | * #define foo(format, ...) bar(format, __VA_ARGS__) | |
72 | * foo("test"); | |
73 | * | |
74 | * will expand to | |
75 | * | |
76 | * bar("test",); | |
77 | * | |
78 | * which is invalid (note the ',)'). With GNUC, '##__VA_ARGS__' drops the | |
79 | * comma, but this is non-standard. | |
80 | */ | |
81 | ||
82 | #define trace_printf(...) \ | |
406102a7 | 83 | trace_printf_key_fl(TRACE_CONTEXT, __LINE__, &trace_default_key, __VA_ARGS__) |
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84 | |
85 | #define trace_printf_key(key, ...) \ | |
86 | trace_printf_key_fl(TRACE_CONTEXT, __LINE__, key, __VA_ARGS__) | |
87 | ||
88 | #define trace_argv_printf(argv, ...) \ | |
89 | trace_argv_printf_fl(TRACE_CONTEXT, __LINE__, argv, __VA_ARGS__) | |
90 | ||
91 | #define trace_strbuf(key, data) \ | |
92 | trace_strbuf_fl(TRACE_CONTEXT, __LINE__, key, data) | |
93 | ||
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94 | #define trace_performance(nanos, ...) \ |
95 | trace_performance_fl(TRACE_CONTEXT, __LINE__, nanos, __VA_ARGS__) | |
96 | ||
97 | #define trace_performance_since(start, ...) \ | |
98 | trace_performance_fl(TRACE_CONTEXT, __LINE__, getnanotime() - (start), \ | |
99 | __VA_ARGS__) | |
100 | ||
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101 | /* backend functions, use non-*fl macros instead */ |
102 | __attribute__((format (printf, 4, 5))) | |
103 | extern void trace_printf_key_fl(const char *file, int line, struct trace_key *key, | |
104 | const char *format, ...); | |
105 | __attribute__((format (printf, 4, 5))) | |
106 | extern void trace_argv_printf_fl(const char *file, int line, const char **argv, | |
107 | const char *format, ...); | |
108 | extern void trace_strbuf_fl(const char *file, int line, struct trace_key *key, | |
109 | const struct strbuf *data); | |
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110 | __attribute__((format (printf, 4, 5))) |
111 | extern void trace_performance_fl(const char *file, int line, | |
112 | uint64_t nanos, const char *fmt, ...); | |
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113 | |
114 | #endif /* HAVE_VARIADIC_MACROS */ | |
115 | ||
5991a55c | 116 | #endif /* TRACE_H */ |