src/lib/lttng-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 "common/macros.h"
  10
  11 /* The tracepoint definition is public, but the provider definition is hidden. */
  12 #define LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION
  13
  14 #define LTTNG_UST_TRACEPOINT_CREATE_PROBES
  15 #define LTTNG_UST_TRACEPOINT_DEFINE
  16 #include "lttng-ust-tracef-provider.h"
  17
  18 static inline
  19 void lttng_ust___vtracef(const char *fmt, va_list ap)
  20         __attribute__((always_inline, format(printf, 1, 0)));
  21 static inline
  22 void lttng_ust___vtracef(const char *fmt, va_list ap)
  23 {
  24         char *msg;
  25         const int len = vasprintf(&msg, fmt, ap);
  26
  27         /* len does not include the final \0 */
  28         if (len < 0)
  29                 goto end;
  30         lttng_ust_tracepoint_cb_lttng_ust_tracef___event(msg, len,
  31                 LTTNG_UST_CALLER_IP());
  32         free(msg);
  33 end:
  34         return;
  35 }
  36
  37 void lttng_ust__vtracef(const char *fmt, va_list ap)
  38         __attribute__((format(printf, 1, 0)));
  39 void lttng_ust__vtracef(const char *fmt, va_list ap)
  40 {
  41         lttng_ust___vtracef(fmt, ap);
  42 }
  43
  44 void lttng_ust__tracef(const char *fmt, ...)
  45         __attribute__((format(printf, 1, 2)));
  46 void lttng_ust__tracef(const char *fmt, ...)
  47 {
  48         va_list ap;
  49
  50         va_start(ap, fmt);
  51         lttng_ust___vtracef(fmt, ap);
  52         va_end(ap);
  53 }