* gdb.threads/sigthread.c: Use barriers to ensure that

child_thread and child_thread_two are always initialized before we
start to use them.

1 files changed, 10 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.threads/sigthread.c b/gdb/testsuite/gdb.threads/sigthread.c
index 131d96a848e..b5233bc9bc8 100644
--- a/gdb/testsuite/gdb.threads/sigthread.c
+++ b/gdb/testsuite/gdb.threads/sigthread.c
@@ -20,6 +20,8 @@
    testing.  */
 #define NSIGS 10000000
 
+pthread_barrier_t barrier;
+
 void
 handler (int sig)
 {
@@ -34,6 +36,8 @@ child_two (void *arg)
 {
   int i;
 
+  pthread_barrier_wait (&barrier);
+
   for (i = 0; i < NSIGS; i++)
     pthread_kill (child_thread, SIGUSR1);
 }
@@ -43,6 +47,8 @@ thread_function (void *arg)
 {
   int i;
 
+  pthread_barrier_wait (&barrier);
+
   for (i = 0; i < NSIGS; i++)
     pthread_kill (child_thread_two, SIGUSR2);
 }
@@ -54,10 +60,14 @@ int main()
   signal (SIGUSR1, handler);
   signal (SIGUSR2, handler);
 
+  pthread_barrier_init (&barrier, NULL, 3);
+
   main_thread = pthread_self ();
   pthread_create (&child_thread, NULL, thread_function, NULL);
   pthread_create (&child_thread_two, NULL, child_two, NULL);
 
+  pthread_barrier_wait (&barrier);
+
   for (i = 0; i < NSIGS; i++)
     pthread_kill (child_thread_two, SIGUSR1);