[PATCH] libgomp: Add master thread to thread pool

[Kevin Buettner]

For debugging purposes, I need to be able to find the master thread
in the thread pool.

Without this patch, I see over 20 failures in the tests that I've
written for GDB.

I've also tested this in the gcc tree - no regressions.

libgomp/ChangeLog:

        * team.c (gomp_team_start): Initialize pool->threads[0].
---
 libgomp/team.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libgomp/team.c b/libgomp/team.c
index 2b2e9750da5..e331c9b72c0 100644
--- a/libgomp/team.c
+++ b/libgomp/team.c
@@ -477,11 +477,17 @@ gomp_team_start (void (*fn) (void *), void *data, 
unsigned nthreads,
         make no effort to expand gomp_threads_size geometrically.  */
       if (nthreads >= pool->threads_size)
        {
+         bool need_init = (pool->threads == NULL);
          pool->threads_size = nthreads + 1;
          pool->threads
            = gomp_realloc (pool->threads,
                            pool->threads_size
                            * sizeof (struct gomp_thread *));
+         if (need_init)
+           {
+             /* Add current (master) thread to threads[].  */
+             pool->threads[0] = thr;
+           }
        }
 
       /* Release existing idle threads.  */