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140 lines
4.3 KiB
140 lines
4.3 KiB
#ifndef TRACE_H |
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#define TRACE_H |
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#include "git-compat-util.h" |
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#include "strbuf.h" |
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struct trace_key { |
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const char * const key; |
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int fd; |
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unsigned int initialized : 1; |
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unsigned int need_close : 1; |
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}; |
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extern struct trace_key trace_default_key; |
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#define TRACE_KEY_INIT(name) { "GIT_TRACE_" #name, 0, 0, 0 } |
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extern struct trace_key trace_perf_key; |
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extern struct trace_key trace_setup_key; |
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extern void trace_repo_setup(const char *prefix); |
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extern int trace_want(struct trace_key *key); |
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extern void trace_disable(struct trace_key *key); |
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extern uint64_t getnanotime(void); |
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extern void trace_command_performance(const char **argv); |
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extern void trace_verbatim(struct trace_key *key, const void *buf, unsigned len); |
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#ifndef HAVE_VARIADIC_MACROS |
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__attribute__((format (printf, 1, 2))) |
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extern void trace_printf(const char *format, ...); |
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__attribute__((format (printf, 2, 3))) |
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extern void trace_printf_key(struct trace_key *key, const char *format, ...); |
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__attribute__((format (printf, 2, 3))) |
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extern void trace_argv_printf(const char **argv, const char *format, ...); |
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extern void trace_strbuf(struct trace_key *key, const struct strbuf *data); |
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/* Prints elapsed time (in nanoseconds) if GIT_TRACE_PERFORMANCE is enabled. */ |
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__attribute__((format (printf, 2, 3))) |
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extern void trace_performance(uint64_t nanos, const char *format, ...); |
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/* Prints elapsed time since 'start' if GIT_TRACE_PERFORMANCE is enabled. */ |
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__attribute__((format (printf, 2, 3))) |
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extern void trace_performance_since(uint64_t start, const char *format, ...); |
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#else |
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/* |
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* Macros to add file:line - see above for C-style declarations of how these |
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* should be used. |
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*/ |
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/* |
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* TRACE_CONTEXT may be set to __FUNCTION__ if the compiler supports it. The |
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* default is __FILE__, as it is consistent with assert(), and static function |
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* names are not necessarily unique. |
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* |
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* __FILE__ ":" __FUNCTION__ doesn't work with GNUC, as __FILE__ is supplied |
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* by the preprocessor as a string literal, and __FUNCTION__ is filled in by |
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* the compiler as a string constant. |
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*/ |
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#ifndef TRACE_CONTEXT |
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# define TRACE_CONTEXT __FILE__ |
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#endif |
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/* |
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* Note: with C99 variadic macros, __VA_ARGS__ must include the last fixed |
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* parameter ('format' in this case). Otherwise, a call without variable |
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* arguments will have a surplus ','. E.g.: |
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* |
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* #define foo(format, ...) bar(format, __VA_ARGS__) |
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* foo("test"); |
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* |
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* will expand to |
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* |
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* bar("test",); |
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* |
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* which is invalid (note the ',)'). With GNUC, '##__VA_ARGS__' drops the |
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* comma, but this is non-standard. |
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*/ |
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#define trace_printf_key(key, ...) \ |
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do { \ |
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if (trace_pass_fl(key)) \ |
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trace_printf_key_fl(TRACE_CONTEXT, __LINE__, key, \ |
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__VA_ARGS__); \ |
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} while (0) |
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#define trace_printf(...) trace_printf_key(&trace_default_key, __VA_ARGS__) |
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#define trace_argv_printf(argv, ...) \ |
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do { \ |
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if (trace_pass_fl(&trace_default_key)) \ |
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trace_argv_printf_fl(TRACE_CONTEXT, __LINE__, \ |
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argv, __VA_ARGS__); \ |
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} while (0) |
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#define trace_strbuf(key, data) \ |
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do { \ |
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if (trace_pass_fl(key)) \ |
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trace_strbuf_fl(TRACE_CONTEXT, __LINE__, key, data);\ |
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} while (0) |
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#define trace_performance(nanos, ...) \ |
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do { \ |
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if (trace_pass_fl(&trace_perf_key)) \ |
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trace_performance_fl(TRACE_CONTEXT, __LINE__, nanos,\ |
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__VA_ARGS__); \ |
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} while (0) |
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#define trace_performance_since(start, ...) \ |
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do { \ |
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if (trace_pass_fl(&trace_perf_key)) \ |
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trace_performance_fl(TRACE_CONTEXT, __LINE__, \ |
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getnanotime() - (start), \ |
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__VA_ARGS__); \ |
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} while (0) |
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/* backend functions, use non-*fl macros instead */ |
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__attribute__((format (printf, 4, 5))) |
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extern void trace_printf_key_fl(const char *file, int line, struct trace_key *key, |
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const char *format, ...); |
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__attribute__((format (printf, 4, 5))) |
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extern void trace_argv_printf_fl(const char *file, int line, const char **argv, |
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const char *format, ...); |
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extern void trace_strbuf_fl(const char *file, int line, struct trace_key *key, |
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const struct strbuf *data); |
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__attribute__((format (printf, 4, 5))) |
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extern void trace_performance_fl(const char *file, int line, |
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uint64_t nanos, const char *fmt, ...); |
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static inline int trace_pass_fl(struct trace_key *key) |
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{ |
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return key->fd || !key->initialized; |
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} |
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#endif /* HAVE_VARIADIC_MACROS */ |
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#endif /* TRACE_H */
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