Merge GDB 7.5.1

gdb/testsuite/gdb.threads/fork-thread-pending.c

Index: gdb/testsuite/gdb.threads/fork-thread-pending.c
diff --git a/gdb/testsuite/gdb.threads/fork-thread-pending.c b/gdb/testsuite/gdb.threads/fork-thread-pending.c
index ba8824ec85ffb8d46be77369c5537d7f2ed8498e..82317d4b37544ac859e2094b60fba4d1a58f090c 100644
--- a/gdb/testsuite/gdb.threads/fork-thread-pending.c
+++ b/gdb/testsuite/gdb.threads/fork-thread-pending.c
@@ -28,6 +28,7 @@
 #define NUMTHREADS 10
 
 volatile int done = 0;
+static pthread_barrier_t barrier;
 
 static void *
 start (void *arg)
@@ -45,6 +46,8 @@ thread_function (void *arg)
 
   printf ("Thread <%d> executing\n", x);
 
+  pthread_barrier_wait (&barrier);
+
   while (!done)
     usleep (100);
 
@@ -62,6 +65,8 @@ thread_forker (void *arg)
 
   printf ("Thread forker <%d> executing\n", x);
 
+  pthread_barrier_wait (&barrier);
+
   switch ((pid = fork ()))
     {
     case -1:
@@ -89,6 +94,9 @@ main (void)
   int args[NUMTHREADS];
   int i, j;
 
+  i = pthread_barrier_init (&barrier, NULL, NUMTHREADS);
+  assert (i == 0);
+
   /* Create a few threads that do mostly nothing, and then one that
      forks.  */
   for (j = 0; j < NUMTHREADS - 1; ++j)