Fix PR/18564 - regression in showing __thread so extern variable

Ensure tls variable address is not relocated, as the msym addr
is an offset in the thread local storage of the shared library/object.

1 files changed, 47 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.threads/tls-so_extern_main.c b/gdb/testsuite/gdb.threads/tls-so_extern_main.c
new file mode 100644
index 0000000..ab70faf
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/tls-so_extern_main.c
@@ -0,0 +1,47 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2015 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   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, see <http://www.gnu.org/licenses/>.  */
+
+#include <pthread.h>
+
+extern __thread void *so_extern;
+extern __thread void *so_extern2;
+
+static void *
+tls_ptr (void *p)
+{
+   so_extern = &so_extern;
+   so_extern2 = &so_extern2; /* break here to check result */
+}
+
+int
+main (void)
+{
+   pthread_t threads[2];
+
+   tls_ptr (NULL);
+
+   pthread_create (&threads[0], NULL, tls_ptr, NULL);
+   pthread_create (&threads[1], NULL, tls_ptr, NULL);
+
+   pthread_join (threads[0], NULL);
+   pthread_join (threads[1], NULL);
+
+   tls_ptr (NULL);
+
+   return 0;
+}
+