/*
- * Copyright (C) 2016 - Aravind HT <aravind.ht@gmail.com>
- * 2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * SPDX-License-Identifier: LGPL-2.1-only
*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Copyright (C) 2016 Aravind HT <aravind.ht@gmail.com>
+ * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
-#define _GNU_SOURCE
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
/*
* Track whether we are within lttng-ust or application, for close
- * system call override by LD_PRELOAD library. Threads registered
- * as being lttng-ust listener threads need to perform fd tracker
- * locking explicitly around their use of file descriptor manipulation
- * functions.
- */
-static DEFINE_URCU_TLS(int, thread_fd_tracking);
-
-/*
- * Track whether we are invoking close() from a signal handler nested on
- * an application thread.
+ * system call override by LD_PRELOAD library. This also tracks whether
+ * we are invoking close() from a signal handler nested on an
+ * application thread.
*/
static DEFINE_URCU_TLS(int, ust_fd_mutex_nest);
-
/* fd_set used to book keep fd being used by lttng-ust. */
static fd_set *lttng_fd_set;
static int lttng_ust_max_fd;
*/
void lttng_ust_fixup_fd_tracker_tls(void)
{
- asm volatile ("" : : "m" (URCU_TLS(thread_fd_tracking)));
asm volatile ("" : : "m" (URCU_TLS(ust_fd_mutex_nest)));
}
* If called from lttng-ust, we directly call close without
* validating whether the FD is part of the tracked set.
*/
- if (URCU_TLS(thread_fd_tracking))
+ if (URCU_TLS(ust_fd_mutex_nest))
return close_cb(fd);
lttng_ust_lock_fd_tracker();
* If called from lttng-ust, we directly call fclose without
* validating whether the FD is part of the tracked set.
*/
- if (URCU_TLS(thread_fd_tracking))
+ if (URCU_TLS(ust_fd_mutex_nest))
return fclose_cb(stream);
fd = fileno(stream);
* If called from lttng-ust, we directly call close without
* validating whether the FD is part of the tracked set.
*/
- if (URCU_TLS(thread_fd_tracking)) {
+ if (URCU_TLS(ust_fd_mutex_nest)) {
for (i = lowfd; i < lttng_ust_max_fd; i++) {
if (close_cb(i) < 0) {
switch (errno) {
end:
return ret;
}
-
-void lttng_ust_fd_tracker_register_thread(void)
-{
- URCU_TLS(thread_fd_tracking) = 1;
-}