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Commit 975f14fa authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

tools lib api: Add debug output support 



Adding support for warning/info/debug output within libapi code. Adding
following macros:

  pr_warning(fmt, ...)
  pr_info(fmt, ...)
  pr_debug(fmt, ...)

Also adding libapi_set_print function to set above functions. This will
be used in perf to set standard debug handlers for libapi.

Adding 2 header files:
  debug.h
    - to be used outside libapi, contains
      libapi_set_print interface

  debug-internal.h
    - to be used within libapi, contains
      pr_warning/pr_info/pr_debug definitions

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1455465826-8426-2-git-send-email-jolsa@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent d646ae0a

tools/lib/api/Build

+1 −0
Original line number Diff line number Diff line 
libapi-y += fd/

libapi-y += fs/

libapi-y += cpu.o

libapi-y += debug.o

tools/lib/api/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ LIBFILE = $(OUTPUT)libapi.a 
CFLAGS := $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)

CFLAGS += -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fPIC

CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64

CFLAGS += -I$(srctree)/tools/lib/api



RM = rm -f

tools/lib/api/debug-internal.h

0 → 100644
+20 −0
Original line number Diff line number Diff line 
#ifndef __API_DEBUG_INTERNAL_H__

#define __API_DEBUG_INTERNAL_H__



#include "debug.h"



#define __pr(func, fmt, ...)	\

do {				\

	if ((func))		\

		(func)("libapi: " fmt, ##__VA_ARGS__); \

} while (0)



extern libapi_print_fn_t __pr_warning;

extern libapi_print_fn_t __pr_info;

extern libapi_print_fn_t __pr_debug;



#define pr_warning(fmt, ...)	__pr(__pr_warning, fmt, ##__VA_ARGS__)

#define pr_info(fmt, ...)	__pr(__pr_info, fmt, ##__VA_ARGS__)

#define pr_debug(fmt, ...)	__pr(__pr_debug, fmt, ##__VA_ARGS__)



#endif /* __API_DEBUG_INTERNAL_H__ */

tools/lib/api/debug.c

0 → 100644
+28 −0
Original line number Diff line number Diff line 
#include <stdio.h>

#include <stdarg.h>

#include "debug.h"

#include "debug-internal.h"



static int __base_pr(const char *format, ...)

{

	va_list args;

	int err;



	va_start(args, format);

	err = vfprintf(stderr, format, args);

	va_end(args);

	return err;

}



libapi_print_fn_t __pr_warning = __base_pr;

libapi_print_fn_t __pr_info    = __base_pr;

libapi_print_fn_t __pr_debug;



void libapi_set_print(libapi_print_fn_t warn,

		      libapi_print_fn_t info,

		      libapi_print_fn_t debug)

{

	__pr_warning = warn;

	__pr_info    = info;

	__pr_debug   = debug;

}

tools/lib/api/debug.h

0 → 100644
+10 −0
Original line number Diff line number Diff line 
#ifndef __API_DEBUG_H__

#define __API_DEBUG_H__



typedef int (*libapi_print_fn_t)(const char *, ...);



void libapi_set_print(libapi_print_fn_t warn,

		      libapi_print_fn_t info,

		      libapi_print_fn_t debug);



#endif /* __API_DEBUG_H__ */