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f63b7381 | 1 | /* Test dlopen rollback after failures involving NODELETE objects (bug 20839). |
581c785b | 2 | Copyright (C) 2019-2022 Free Software Foundation, Inc. |
f63b7381 FW |
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 <dlfcn.h> | |
20 | #include <errno.h> | |
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21 | #include <stddef.h> |
22 | #include <stdio.h> | |
23 | #include <string.h> | |
24 | #include <support/check.h> | |
25 | #include <support/xdlfcn.h> | |
26 | ||
27 | static int | |
28 | do_test (void) | |
29 | { | |
7862ff8e | 30 | TEST_VERIFY (dlsym (NULL, "no_delete_mod_function") == NULL); |
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31 | |
32 | /* This is expected to fail because of the missing dependency. */ | |
33 | puts ("info: attempting to load tst-dlopenfailmod1.so"); | |
34 | TEST_VERIFY (dlopen ("tst-dlopenfailmod1.so", RTLD_LAZY) == NULL); | |
35 | const char *message = dlerror (); | |
36 | TEST_COMPARE_STRING (message, | |
37 | "tst-dlopenfail-missingmod.so:" | |
38 | " cannot open shared object file:" | |
39 | " No such file or directory"); | |
40 | ||
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41 | /* Do not probe for the presence of the tst-dlopenfailnodelmod.so at |
42 | this point because that might trigger relocation if bug 20839 is | |
43 | present, obscuring a subsequent crash. */ | |
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44 | |
45 | /* This is expected to succeed. */ | |
46 | puts ("info: loading tst-dlopenfailmod2.so"); | |
47 | void *handle = xdlopen ("tst-dlopenfailmod2.so", RTLD_NOW); | |
48 | xdlclose (handle); | |
49 | ||
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50 | /* The NODELETE module should remain loaded. */ |
51 | TEST_VERIFY (dlopen ("tst-dlopenfailnodelmod.so", RTLD_LAZY | RTLD_NOLOAD) | |
52 | != NULL); | |
53 | /* But the symbol is not in the global scope. */ | |
54 | TEST_VERIFY (dlsym (NULL, "no_delete_mod_function") == NULL); | |
f63b7381 | 55 | |
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56 | /* We can make tst-dlopenfailnodelmod.so global, and then the symbol |
57 | should become available. */ | |
58 | TEST_VERIFY (dlopen ("tst-dlopenfailnodelmod.so", RTLD_LAZY | RTLD_GLOBAL) | |
59 | != NULL); | |
60 | void (*no_delete_mod_function) (void) | |
61 | = dlsym (NULL, "no_delete_mod_function"); | |
62 | TEST_VERIFY_EXIT (no_delete_mod_function != NULL); | |
f63b7381 | 63 | |
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64 | /* Hopefully, no_delete_mod_function is sufficiently complex to |
65 | depend on relocations. */ | |
66 | no_delete_mod_function (); | |
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67 | |
68 | return 0; | |
69 | } | |
70 | ||
71 | #include <support/test-driver.c> |