1/* Initialization of libc after dlmopen/dlclose/dlmopen (bug 29528). Main.
2 Copyright (C) 2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <stdio.h>
20#include <support/check.h>
21#include <support/xdlfcn.h>
22
23/* Run the test multiple times, to check finding a new namespace while
24 another namespace is already in use. This used to trigger bug 29600. */
25static void
26recurse (int depth)
27{
28 if (depth == 0)
29 return;
30
31 printf (format: "info: running at depth %d\n", depth);
32 void *handle = xdlmopen (LM_ID_NEWLM, filename: "tst-dlmopen-twice-mod1.so",
33 RTLD_NOW);
34 xdlclose (handle);
35 handle = xdlmopen (LM_ID_NEWLM, filename: "tst-dlmopen-twice-mod2.so", RTLD_NOW);
36 int (*run_check) (void) = xdlsym (handle, symbol: "run_check");
37 TEST_COMPARE (run_check (), 0);
38 recurse (depth: depth - 1);
39 xdlclose (handle);
40}
41
42static int
43do_test (void)
44{
45 /* First run the test without nesting. */
46 recurse (depth: 1);
47
48 /* Then with nesting. The constant needs to be less than the
49 internal DL_NNS namespace constant. */
50 recurse (depth: 10);
51 return 0;
52}
53
54#include <support/test-driver.c>
55

source code of glibc/elf/tst-dlmopen-twice.c