1 files changed, 156 insertions, 0 deletions
diff --git a/REORG.TODO/stdlib/tst-tls-atexit.c b/REORG.TODO/stdlib/tst-tls-atexit.c
new file mode 100644
index 0000000000..6dbf49d460
--- /dev/null
+++ b/REORG.TODO/stdlib/tst-tls-atexit.c
@@ -0,0 +1,156 @@
+/* Verify that DSO is unloaded only if its TLS objects are destroyed.
+   Copyright (C) 2013-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* For the default case, i.e. NO_DELETE not defined, the test dynamically loads
+   a DSO and spawns a thread that subsequently calls into the DSO to register a
+   destructor for an object in the DSO and then calls dlclose on the handle for
+   the DSO.  When the thread exits, the DSO should not be unloaded or else the
+   destructor called during thread exit will crash.  Further in the main
+   thread, the DSO is opened and closed again, at which point the DSO should be
+   unloaded.
+
+   When NO_DELETE is defined, the DSO is loaded twice, once with just RTLD_LAZY
+   flag and the second time with the RTLD_NODELETE flag set.  The thread is
+   spawned, destructor registered and then thread exits without closing the
+   DSO.  In the main thread, the first handle is then closed, followed by the
+   second handle.  In the end, the DSO should remain loaded due to the
+   RTLD_NODELETE flag being set in the second dlopen call.  */
+
+#include <dlfcn.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <link.h>
+#include <stdbool.h>
+
+#ifndef NO_DELETE
+# define LOADED_IS_GOOD false
+#endif
+
+#ifndef H2_RTLD_FLAGS
+# define H2_RTLD_FLAGS (RTLD_LAZY)
+#endif
+
+#define DSO_NAME "$ORIGIN/tst-tls-atexit-lib.so"
+
+/* Walk through the map in the _r_debug structure to see if our lib is still
+   loaded.  */
+static bool
+is_loaded (void)
+{
+  struct link_map *lm = (struct link_map *) _r_debug.r_map;
+
+  for (; lm; lm = lm->l_next)
+    if (lm->l_type == lt_loaded && lm->l_name
+	&& strcmp (basename (DSO_NAME), basename (lm->l_name)) == 0)
+      {
+	printf ("%s is still loaded\n", lm->l_name);
+	return true;
+      }
+  return false;
+}
+
+/* Accept a valid handle returned by DLOPEN, load the reg_dtor symbol to
+   register a destructor and then call dlclose on the handle.  The dlclose
+   should not unload the DSO since the destructor has not been called yet.  */
+static void *
+reg_dtor_and_close (void *h)
+{
+  void (*reg_dtor) (void) = (void (*) (void)) dlsym (h, "reg_dtor");
+
+  if (reg_dtor == NULL)
+    {
+      printf ("Unable to find symbol: %s\n", dlerror ());
+      return (void *) (uintptr_t) 1;
+    }
+
+  reg_dtor ();
+
+#ifndef NO_DELETE
+  dlclose (h);
+#endif
+
+  return NULL;
+}
+
+static int
+spawn_thread (void *h)
+{
+  pthread_t t;
+  int ret;
+  void *thr_ret;
+
+  if ((ret = pthread_create (&t, NULL, reg_dtor_and_close, h)) != 0)
+    {
+      printf ("pthread_create failed: %s\n", strerror (ret));
+      return 1;
+    }
+
+  if ((ret = pthread_join (t, &thr_ret)) != 0)
+    {
+      printf ("pthread_join failed: %s\n", strerror (ret));
+      return 1;
+    }
+
+  if (thr_ret != NULL)
+    return 1;
+
+  return 0;
+}
+
+static int
+do_test (void)
+{
+  /* Load the DSO.  */
+  void *h1 = dlopen (DSO_NAME, RTLD_LAZY);
+  if (h1 == NULL)
+    {
+      printf ("h1: Unable to load DSO: %s\n", dlerror ());
+      return 1;
+    }
+
+#ifndef NO_DELETE
+  if (spawn_thread (h1) != 0)
+    return 1;
+#endif
+
+  void *h2 = dlopen (DSO_NAME, H2_RTLD_FLAGS);
+  if (h2 == NULL)
+    {
+      printf ("h2: Unable to load DSO: %s\n", dlerror ());
+      return 1;
+    }
+
+#ifdef NO_DELETE
+  if (spawn_thread (h1) != 0)
+    return 1;
+
+  dlclose (h1);
+#endif
+  dlclose (h2);
+
+  /* Check link maps to ensure that the DSO has unloaded.  In the normal case,
+     the DSO should be unloaded if there are no uses.  However, if one of the
+     dlopen calls were with RTLD_NODELETE, the DSO should remain loaded.  */
+  return is_loaded () == LOADED_IS_GOOD ? 0 : 1;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"