X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-consumerd%2Flttng-consumerd.c;h=dbcda885eede04a0a92a3189a975247de80ce4f2;hb=a0377dfefe40662ba7d68617bce6ff467114136c;hp=ddd07a14279eb3e88bc93b5497e8989a08cb2b3a;hpb=929f71ec24b58045319473f050a7f235f726ec78;p=lttng-tools.git

diff --git a/src/bin/lttng-consumerd/lttng-consumerd.c b/src/bin/lttng-consumerd/lttng-consumerd.c
index ddd07a142..dbcda885e 100644
--- a/src/bin/lttng-consumerd/lttng-consumerd.c
+++ b/src/bin/lttng-consumerd/lttng-consumerd.c
@@ -1,19 +1,9 @@
 /*
- * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
- *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
  *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #define _LGPL_SOURCE
@@ -36,7 +26,6 @@
 #include <poll.h>
 #include <unistd.h>
 #include <sys/mman.h>
-#include <assert.h>
 #include <urcu/compiler.h>
 #include <ulimit.h>
 
@@ -93,13 +82,30 @@ enum lttng_consumer_type lttng_consumer_get_type(void)
 /*
  * Signal handler for the daemon
  */
-static void sighandler(int sig)
+static void sighandler(int sig, siginfo_t *siginfo, void *arg)
 {
 	if (sig == SIGINT && sigintcount++ == 0) {
 		DBG("ignoring first SIGINT");
 		return;
 	}
 
+	if (sig == SIGBUS) {
+		int write_ret;
+		const char msg[] = "Received SIGBUS, aborting program.\n";
+
+		lttng_consumer_sigbus_handle(siginfo->si_addr);
+		/*
+		 * If ustctl did not catch this signal (triggering a
+		 * siglongjmp), abort the program. Otherwise, the execution
+		 * will resume from the ust-ctl call which caused this error.
+		 *
+		 * The return value is ignored since the program aborts anyhow.
+		 */
+		write_ret = write(STDERR_FILENO, msg, sizeof(msg));
+		(void) write_ret;
+		abort();
+	}
+
 	if (ctx) {
 		lttng_consumer_should_exit(ctx);
 	}
@@ -107,7 +113,7 @@ static void sighandler(int sig)
 
 /*
  * Setup signal handler for :
- *      SIGINT, SIGTERM, SIGPIPE
+ *      SIGINT, SIGTERM, SIGPIPE, SIGBUS
  */
 static int set_signal_handler(void)
 {
@@ -121,9 +127,9 @@ static int set_signal_handler(void)
 	}
 
 	sa.sa_mask = sigset;
-	sa.sa_flags = 0;
+	sa.sa_flags = SA_SIGINFO;
 
-	sa.sa_handler = sighandler;
+	sa.sa_sigaction = sighandler;
 	if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
 		PERROR("sigaction");
 		return ret;
@@ -134,6 +140,12 @@ static int set_signal_handler(void)
 		return ret;
 	}
 
+	if ((ret = sigaction(SIGBUS, &sa, NULL)) < 0) {
+		PERROR("sigaction");
+		return ret;
+	}
+
+	sa.sa_flags = 0;
 	sa.sa_handler = SIG_IGN;
 	if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
 		PERROR("sigaction");
@@ -311,6 +323,10 @@ int main(int argc, char **argv)
 
 	rcu_register_thread();
 
+	if (run_as_create_worker(argv[0], NULL, NULL) < 0) {
+		goto exit_set_signal_handler;
+	}
+
 	if (set_signal_handler()) {
 		retval = -1;
 		goto exit_set_signal_handler;
@@ -411,10 +427,6 @@ int main(int argc, char **argv)
 		set_ulimit();
 	}
 
-	if (run_as_create_worker(argv[0], NULL, NULL) < 0) {
-		goto exit_init_data;
-	}
-
 	/* create the consumer instance with and assign the callbacks */
 	ctx = lttng_consumer_create(opt_type, lttng_consumer_read_subbuffer,
 		NULL, lttng_consumer_on_recv_stream, NULL);