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