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Commit a1556f84 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 5b7f445d

tools/perf/lib/core.c

+34 −0
Original line number Diff line number Diff line 
// 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);

}

tools/perf/lib/include/perf/core.h

+13 −0
Original line number Diff line number Diff line
@@ -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 */

tools/perf/lib/internal.h

0 → 100644
+18 −0
Original line number Diff line number Diff line 
/* 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 */

tools/perf/lib/libperf.map

+2 −0
Original line number Diff line number Diff line 
LIBPERF_0.0.1 {

	global:

		libperf_set_print;

	local:

		*;

};