1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/* Verify that an already opened DSO opened agained with RTLD_NODELETE actually
sets the NODELETE flag.
Copyright (C) 2015-2023 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/>. */
#include <dlfcn.h>
#include <stdio.h>
int
do_test (void)
{
void *h1 = dlopen ("$ORIGIN/tst-nodelete-opened-lib.so", RTLD_LAZY);
if (h1 == NULL)
{
printf ("h1: failed to open DSO: %s\n", dlerror ());
return 1;
}
void *h2 = dlopen ("$ORIGIN/tst-nodelete-opened-lib.so",
RTLD_LAZY | RTLD_NODELETE);
if (h2 == NULL)
{
printf ("h2: failed to open DSO: %s\n", dlerror ());
return 1;
}
int *foo = dlsym (h2, "foo_var");
if (foo == NULL)
{
printf ("failed to load symbol foo_var: %s\n", dlerror ());
return 1;
}
if (dlclose (h1) != 0)
{
printf ("h1: dlclose failed: %s\n", dlerror ());
return 1;
}
if (dlclose (h2) != 0)
{
printf ("h2: dlclose failed: %s\n", dlerror ());
return 1;
}
/* This FOO dereference will crash with a segfault if the DSO was
unloaded. */
printf ("foo == %d\n", *foo);
return 0;
}
#include <support/test-driver.c>
|
