liblttng-ust/tracef.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-tracef-provider.h"
  30
  31 void _lttng_ust_tracef(const char *fmt, ...)
  32 {
  33         va_list ap;
  34         char *msg;
  35         int len;
  36
  37         va_start(ap, fmt);
  38         len = vasprintf(&msg, fmt, ap);
  39         /* len does not include the final \0 */
  40         if (len < 0)
  41                 goto end;
  42         __tracepoint_cb_lttng_ust_tracef___event(msg, len,
  43                 __builtin_return_address(0));
  44         free(msg);
  45 end:
  46         va_end(ap);
  47 }