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