Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 76 insertions, 0 deletions

diff --git a/REORG.TODO/dlfcn/tststatic5.c b/REORG.TODO/dlfcn/tststatic5.c
new file mode 100644
index 0000000000..782304811d
--- /dev/null
+++ b/REORG.TODO/dlfcn/tststatic5.c
@@ -0,0 +1,76 @@
+/* GLRO(dl_pagesize) initialization DSO test with a static executable.
+   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/>.  */
+
+#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"