src/liblttng-ust/tracef.c

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (C) 2013-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  */
   6
   7 #define _LGPL_SOURCE
   8 #include <stdio.h>
   9 #include <ust-helper.h>
  10
  11 #define TRACEPOINT_CREATE_PROBES
  12 #define TRACEPOINT_DEFINE
  13 #include "lttng-ust-tracef-provider.h"
  14
  15 static inline
  16 void __lttng_ust_vtracef(const char *fmt, va_list ap)
  17         __attribute__((always_inline, format(printf, 1, 0)));
  18 static inline
  19 void __lttng_ust_vtracef(const char *fmt, va_list ap)
  20 {
  21         char *msg;
  22         const int len = vasprintf(&msg, fmt, ap);
  23
  24         /* len does not include the final \0 */
  25         if (len < 0)
  26                 goto end;
  27         __tracepoint_cb_lttng_ust_tracef___event(msg, len,
  28                 LTTNG_UST_CALLER_IP());
  29         free(msg);
  30 end:
  31         return;
  32 }
  33
  34 /*
  35  * FIXME: We should include <lttng/tracef.h> for the declarations here, but it
  36  * fails with tracepoint magic above my paygrade.
  37  */
  38
  39 void _lttng_ust_vtracef(const char *fmt, va_list ap)
  40         __attribute__((format(printf, 1, 0)));
  41 void _lttng_ust_vtracef(const char *fmt, va_list ap)
  42 {
  43         __lttng_ust_vtracef(fmt, ap);
  44 }
  45
  46 void _lttng_ust_tracef(const char *fmt, ...)
  47         __attribute__((format(printf, 1, 2)));
  48 void _lttng_ust_tracef(const char *fmt, ...)
  49 {
  50         va_list ap;
  51
  52         va_start(ap, fmt);
  53         __lttng_ust_vtracef(fmt, ap);
  54         va_end(ap);
  55 }