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, 108 insertions, 0 deletions

diff --git a/REORG.TODO/elf/tst-dlmodcount.c b/REORG.TODO/elf/tst-dlmodcount.c
new file mode 100644
index 0000000000..34c5b25d7f
--- /dev/null
+++ b/REORG.TODO/elf/tst-dlmodcount.c
@@ -0,0 +1,108 @@
+/* Copyright (C) 2004-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Mosberger <davidm@hpl.hp.com>, 2004.
+
+   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 <link.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define SET	0
+#define ADD	1
+#define REMOVE	2
+
+#define leq(l,r)	(((r) - (l)) <= ~0ULL / 2)
+
+static int
+callback (struct dl_phdr_info *info, size_t size, void *ptr)
+{
+  static int last_adds = 0, last_subs = 0;
+  intptr_t cmd = (intptr_t) ptr;
+
+  printf ("  size = %Zu\n", size);
+  if (size < (offsetof (struct dl_phdr_info, dlpi_subs)
+	      + sizeof (info->dlpi_subs)))
+    {
+      fprintf (stderr, "dl_iterate_phdr failed to pass dlpi_adds/dlpi_subs\n");
+      exit (5);
+    }
+
+  printf ("  dlpi_adds = %Lu dlpi_subs = %Lu\n",
+	  info->dlpi_adds, info->dlpi_subs);
+
+  switch (cmd)
+    {
+    case SET:
+      break;
+
+    case ADD:
+      if (leq (info->dlpi_adds, last_adds))
+	{
+	  fprintf (stderr, "dlpi_adds failed to get incremented!\n");
+	  exit (3);
+	}
+      break;
+
+    case REMOVE:
+      if (leq (info->dlpi_subs, last_subs))
+	{
+	  fprintf (stderr, "dlpi_subs failed to get incremented!\n");
+	  exit (4);
+	}
+      break;
+    }
+  last_adds = info->dlpi_adds;
+  last_subs = info->dlpi_subs;
+  return -1;
+}
+
+static void *
+load (const char *path)
+{
+  void *handle;
+
+  printf ("loading `%s'\n", path);
+  handle = dlopen (path, RTLD_LAZY);
+  if (!handle)
+    exit (1);
+  dl_iterate_phdr (callback, (void *)(intptr_t) ADD);
+  return handle;
+}
+
+static void
+unload (const char *path, void *handle)
+{
+  printf ("unloading `%s'\n", path);
+  if (dlclose (handle) < 0)
+    exit (2);
+  dl_iterate_phdr (callback, (void *)(intptr_t) REMOVE);
+}
+
+static int
+do_test (void)
+{
+  void *handle1, *handle2;
+
+  dl_iterate_phdr (callback, (void *)(intptr_t) SET);
+  handle1 = load ("firstobj.so");
+  handle2 = load ("globalmod1.so");
+  unload ("firstobj.so", handle1);
+  unload ("globalmod1.so", handle2);
+  return 0;
+}
+
+#include <support/test-driver.c>