elf: Do not assume symbol order on tst-audit25{a,b}

The static linker might impose any order or internal function
position, so change the test to check if the audit prints the
symbol only once in any order.

1 files changed, 49 insertions, 0 deletions

diff --git a/elf/tst-audit25.h b/elf/tst-audit25.h
new file mode 100644
index 0000000000..9011c13f3e
--- /dev/null
+++ b/elf/tst-audit25.h
@@ -0,0 +1,49 @@
+/* Check LD_AUDIT and LD_BIND_NOW.  Common definitions.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+static void
+compare_output (void *buffer, size_t length, const char *ref[], size_t reflen)
+{
+  FILE *in = fmemopen (buffer, length, "r");
+  TEST_VERIFY_EXIT (in != NULL);
+  char *line = NULL;
+  size_t linelen = 0;
+
+  bool found[reflen];
+  for (int i = 0; i < reflen; i++)
+    found[i] = false;
+
+  size_t nlines = 0;
+  while (xgetline (&line, &linelen, in))
+    {
+      for (int i = 0; i < reflen; i++)
+	if (strcmp (line, ref[i]) == 0)
+	  {
+	    TEST_COMPARE (found[i], false);
+	    found[i] = true;
+	  }
+      nlines++;
+    }
+
+  TEST_COMPARE (reflen, nlines);
+  for (int i = 0; i < reflen; i++)
+    TEST_COMPARE (found[i], true);
+
+  free (line);
+  fclose (in);
+}