core: block unused signals in created threads

Block all signal except those which are set for explicit handling
in glusterfs_signals_setup(). Since thread spawning code in
libglusterfs and xlators can get called from application threads
when used through libgfapi, it is necessary to do this blocking.

Change-Id: Ia320f80521a83d2edcda50b9ad414583a0175281
BUG: 1011662
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/5995
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index f223a3f8a85..d57cd8a55fe 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -2807,6 +2807,7 @@ out:
 
 }
 
+
 /* Sets log file path from user provided arguments */
 int
 gf_set_log_file_path (cmd_args_t *cmd_args)
@@ -2868,3 +2869,29 @@ gf_set_log_file_path (cmd_args_t *cmd_args)
 done:
         return ret;
 }
+
+int
+gf_thread_create (pthread_t *thread, const pthread_attr_t *attr,
+		  void *(*start_routine)(void *), void *arg)
+{
+	sigset_t set, old;
+	int ret;
+
+	sigemptyset (&set);
+
+	sigfillset (&set);
+	sigdelset (&set, SIGSEGV);
+	sigdelset (&set, SIGBUS);
+	sigdelset (&set, SIGILL);
+	sigdelset (&set, SIGSYS);
+	sigdelset (&set, SIGFPE);
+	sigdelset (&set, SIGABRT);
+
+	pthread_sigmask (SIG_BLOCK, &set, &old);
+
+	ret = pthread_create (thread, attr, start_routine, arg);
+
+	pthread_sigmask (SIG_SETMASK, &old, NULL);
+
+	return ret;
+}