diff options
author | Jiri Olsa <jolsa@kernel.org> | 2019-07-21 14:24:14 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-07-30 00:34:44 +0300 |
commit | a1556f8479ed58b8d5a33aef54578bad0165c7e7 (patch) | |
tree | f00f4e19160f6b4d5663f53dc8cc06424b12fddf /tools/perf | |
parent | 5b7f445d684fc287a2101e29d42d1fee19ae14ff (diff) | |
download | linux-a1556f8479ed58b8d5a33aef54578bad0165c7e7.tar.xz |
libperf: Add debug output support
Add the perf_set_print() function to allow setting an output function
for warn/info/debug messages.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-28-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r-- | tools/perf/lib/core.c | 34 | ||||
-rw-r--r-- | tools/perf/lib/include/perf/core.h | 13 | ||||
-rw-r--r-- | tools/perf/lib/internal.h | 18 | ||||
-rw-r--r-- | tools/perf/lib/libperf.map | 2 |
4 files changed, 67 insertions, 0 deletions
diff --git a/tools/perf/lib/core.c b/tools/perf/lib/core.c index e69de29bb2d1..29d5e3348718 100644 --- a/tools/perf/lib/core.c +++ b/tools/perf/lib/core.c @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#define __printf(a, b) __attribute__((format(printf, a, b))) + +#include <stdio.h> +#include <stdarg.h> +#include <perf/core.h> +#include "internal.h" + +static int __base_pr(enum libperf_print_level level, const char *format, + va_list args) +{ + return vfprintf(stderr, format, args); +} + +static libperf_print_fn_t __libperf_pr = __base_pr; + +void libperf_set_print(libperf_print_fn_t fn) +{ + __libperf_pr = fn; +} + +__printf(2, 3) +void libperf_print(enum libperf_print_level level, const char *format, ...) +{ + va_list args; + + if (!__libperf_pr) + return; + + va_start(args, format); + __libperf_pr(level, format, args); + va_end(args); +} diff --git a/tools/perf/lib/include/perf/core.h b/tools/perf/lib/include/perf/core.h index e2e4b43c9131..c341a7b2c874 100644 --- a/tools/perf/lib/include/perf/core.h +++ b/tools/perf/lib/include/perf/core.h @@ -2,8 +2,21 @@ #ifndef __LIBPERF_CORE_H #define __LIBPERF_CORE_H +#include <stdarg.h> + #ifndef LIBPERF_API #define LIBPERF_API __attribute__((visibility("default"))) #endif +enum libperf_print_level { + LIBPERF_WARN, + LIBPERF_INFO, + LIBPERF_DEBUG, +}; + +typedef int (*libperf_print_fn_t)(enum libperf_print_level level, + const char *, va_list ap); + +LIBPERF_API void libperf_set_print(libperf_print_fn_t fn); + #endif /* __LIBPERF_CORE_H */ diff --git a/tools/perf/lib/internal.h b/tools/perf/lib/internal.h new file mode 100644 index 000000000000..dc92f241732e --- /dev/null +++ b/tools/perf/lib/internal.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LIBPERF_INTERNAL_H +#define __LIBPERF_INTERNAL_H + +void libperf_print(enum libperf_print_level level, + const char *format, ...) + __attribute__((format(printf, 2, 3))); + +#define __pr(level, fmt, ...) \ +do { \ + libperf_print(level, "libperf: " fmt, ##__VA_ARGS__); \ +} while (0) + +#define pr_warning(fmt, ...) __pr(LIBPERF_WARN, fmt, ##__VA_ARGS__) +#define pr_info(fmt, ...) __pr(LIBPERF_INFO, fmt, ##__VA_ARGS__) +#define pr_debug(fmt, ...) __pr(LIBPERF_DEBUG, fmt, ##__VA_ARGS__) + +#endif /* __LIBPERF_INTERNAL_H */ diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map index a8e913988edf..3536242c545c 100644 --- a/tools/perf/lib/libperf.map +++ b/tools/perf/lib/libperf.map @@ -1,4 +1,6 @@ LIBPERF_0.0.1 { + global: + libperf_set_print; local: *; }; |