Commit-ID: a1556f8479ed58b8d5a33aef54578bad0165c7e7 Gitweb: https://git.kernel.org/tip/a1556f8479ed58b8d5a33aef54578bad0165c7e7 Author: Jiri Olsa <jo...@kernel.org> AuthorDate: Sun, 21 Jul 2019 13:24:14 +0200 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Mon, 29 Jul 2019 18:34:44 -0300
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 <jo...@kernel.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Alexey Budankov <alexey.budan...@linux.intel.com> Cc: Andi Kleen <a...@linux.intel.com> Cc: Michael Petlan <mpet...@redhat.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/r/20190721112506.12306-28-jo...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/lib/core.c | 34 ++++++++++++++++++++++++++++++++++ tools/perf/lib/include/perf/core.h | 13 +++++++++++++ tools/perf/lib/internal.h | 18 ++++++++++++++++++ tools/perf/lib/libperf.map | 2 ++ 4 files changed, 67 insertions(+) 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: *; };
