Introduce vtracef

[lttng-ust.git] / liblttng-ust / tracef.c

/*
 * Copyright (C) 2013-2014  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <stdio.h>
#include <helper.h>

#define TRACEPOINT_CREATE_PROBES
#define TRACEPOINT_DEFINE
#include "lttng-ust-tracef-provider.h"

static inline __attribute__((always_inline))
void __lttng_ust_vtracef(const char *fmt, va_list ap)
{
	char *msg;
	const int len = vasprintf(&msg, fmt, ap);

	/* len does not include the final \0 */
	if (len < 0)
		goto end;
	__tracepoint_cb_lttng_ust_tracef___event(msg, len,
		LTTNG_UST_CALLER_IP());
	free(msg);
end:
	return;
}

void _lttng_ust_vtracef(const char *fmt, va_list ap)
{
	__lttng_ust_vtracef(fmt, ap);
}

void _lttng_ust_tracef(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	__lttng_ust_vtracef(fmt, ap);
	va_end(ap);
}