Add a dlopen/getpagesize static executable test.

1 files changed, 76 insertions, 0 deletions

diff --git a/dlfcn/tststatic5.c b/dlfcn/tststatic5.c
new file mode 100644
index 0000000..3d0ff7f
--- /dev/null
+++ b/dlfcn/tststatic5.c
@@ -0,0 +1,76 @@
+/* GLRO(dl_pagesize) initialization DSO test with a static executable.
+   Copyright (C) 2013 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/>.  */
+
+#include <dlfcn.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* Check that the same page size is reported both directly and by a DSO
+   mapped from a static executable.
+
+   On targets that support different page sizes, the kernel communicates
+   the size currently in use via the auxiliary vector.  This vector is
+   available to initial startup, but not any DSOs loaded later on.  As
+   static executables do not export their symbols a DSO cannot access
+   the value obtained by initial startup and the value therefore has to
+   be passed on to the DSO and stored within its data area explicitly.
+   This is performed by a call to DL_STATIC_INIT that is defined in a
+   target-dependent way, and that on variable page size targets stores
+   it in the GLRO(dl_pagesize) variable of the DSO's dynamic linker.  */
+static int
+do_test (void)
+{
+  int pagesize = getpagesize ();
+  int (*my_getpagesize) (void);
+  int my_pagesize;
+  void *handle;
+
+  /* Try to map a module.  */
+  handle = dlopen ("modstatic5.so", RTLD_LAZY | RTLD_LOCAL);
+  if (handle == NULL)
+    {
+      printf ("dlopen (modstatic5.so): %s\n", dlerror ());
+      return 1;
+    }
+
+  /* Get at its symbol.  */
+  my_getpagesize = dlsym (handle, "my_getpagesize");
+  if (my_getpagesize == NULL)
+    {
+      printf ("dlsym (my_getpagesize): %s\n", dlerror ());
+      return 1;
+    }
+
+  /* Make sure the page size reported is the same either way.  */
+  my_pagesize = my_getpagesize ();
+  if (my_pagesize != pagesize)
+    {
+      printf ("my_getpagesize: got %i, expected %i\n", my_pagesize, pagesize);
+      return 1;
+    }
+
+  /* All done, clean up.  */
+  my_getpagesize = NULL;
+  dlclose (handle);
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"