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 #include <helper.h>
  27
  28 #define TRACEPOINT_CREATE_PROBES
  29 #define TRACEPOINT_DEFINE
  30 #include "lttng-ust-tracelog-provider.h"
  31
  32 #define TRACELOG_CB(level) \
  33         static inline __attribute__((always_inline)) \
  34         void __lttng_ust_vtracelog_##level(const char *file, \
  35                         int line, const char *func, \
  36                         const char *fmt, va_list ap) \
  37         { \
  38                 char *msg; \
  39                 const int len = vasprintf(&msg, fmt, ap); \
  40                 \
  41                 /* len does not include the final \0 */ \
  42                 if (len < 0) \
  43                         goto end; \
  44                 __tracepoint_cb_lttng_ust_tracelog___##level(file, \
  45                         line, func, msg, len, \
  46                         LTTNG_UST_CALLER_IP()); \
  47                 free(msg); \
  48         end: \
  49                 return; \
  50         } \
  51         \
  52         void _lttng_ust_vtracelog_##level(const char *file, \
  53                         int line, const char *func, \
  54                         const char *fmt, va_list ap) \
  55         { \
  56                 __lttng_ust_vtracelog_##level(file, line, func, fmt, ap); \
  57         } \
  58         \
  59         void _lttng_ust_tracelog_##level(const char *file, \
  60                         int line, const char *func, \
  61                         const char *fmt, ...) \
  62         { \
  63                 va_list ap; \
  64                 \
  65                 va_start(ap, fmt); \
  66                 __lttng_ust_vtracelog_##level(file, line, func, fmt, ap); \
  67                 va_end(ap); \
  68         }
  69
  70 TRACELOG_CB(TRACE_EMERG)
  71 TRACELOG_CB(TRACE_ALERT)
  72 TRACELOG_CB(TRACE_CRIT)
  73 TRACELOG_CB(TRACE_ERR)
  74 TRACELOG_CB(TRACE_WARNING)
  75 TRACELOG_CB(TRACE_NOTICE)
  76 TRACELOG_CB(TRACE_INFO)
  77 TRACELOG_CB(TRACE_DEBUG_SYSTEM)
  78 TRACELOG_CB(TRACE_DEBUG_PROGRAM)
  79 TRACELOG_CB(TRACE_DEBUG_PROCESS)
  80 TRACELOG_CB(TRACE_DEBUG_MODULE)
  81 TRACELOG_CB(TRACE_DEBUG_UNIT)
  82 TRACELOG_CB(TRACE_DEBUG_FUNCTION)
  83 TRACELOG_CB(TRACE_DEBUG_LINE)
  84 TRACELOG_CB(TRACE_DEBUG)