liblttng-ust/tracelog.c

   1 /*
   2  * Copyright (C) 2013-2014  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #define _GNU_SOURCE
  24 #define _LGPL_SOURCE
  25 #include <stdio.h>
  26
  27 #define TRACEPOINT_CREATE_PROBES
  28 #define TRACEPOINT_DEFINE
  29 #include "lttng-ust-tracelog-provider.h"
  30
  31 #define TRACELOG_CB(level) \
  32         void _lttng_ust_tracelog_##level(const char *file, \
  33                         int line, const char *func, \
  34                         const char *fmt, ...) \
  35         { \
  36                 va_list ap; \
  37                 char *msg; \
  38                 int len; \
  39                 \
  40                 va_start(ap, fmt); \
  41                 len = vasprintf(&msg, fmt, ap); \
  42                 /* len does not include the final \0 */ \
  43                 if (len < 0) \
  44                         goto end; \
  45                 __tracepoint_cb_lttng_ust_tracelog___##level(file, \
  46                         line, func, msg, len, \
  47                         __builtin_return_address(0)); \
  48                 free(msg); \
  49         end: \
  50                 va_end(ap); \
  51         }
  52
  53 TRACELOG_CB(emerg)
  54 TRACELOG_CB(alert)
  55 TRACELOG_CB(crit)
  56 TRACELOG_CB(err)
  57 TRACELOG_CB(warning)
  58 TRACELOG_CB(notice)
  59 TRACELOG_CB(info)
  60 TRACELOG_CB(debug_system)
  61 TRACELOG_CB(debug_program)
  62 TRACELOG_CB(debug_process)
  63 TRACELOG_CB(debug_module)
  64 TRACELOG_CB(debug_unit)
  65 TRACELOG_CB(debug_function)
  66 TRACELOG_CB(debug_line)
  67 TRACELOG_CB(debug)