1 | /* Verify atexit, on_exit, etc. abort on NULL function pointer. |
2 | Copyright (C) 2018-2022 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 | |
20 | #include <assert.h> |
21 | #include <signal.h> |
22 | #include <stdlib.h> |
23 | #include <string.h> |
24 | #include <support/capture_subprocess.h> |
25 | #include <support/check.h> |
26 | #include <support/support.h> |
27 | #include <support/test-driver.h> |
28 | |
29 | extern int __cxa_atexit (void (*func) (void *), void *arg, void *d); |
30 | extern int __cxa_at_quick_exit (void (*func) (void *), void *arg, void *d); |
31 | |
32 | /* GCC "knows" that atexit and on_exit should not be called with NULL |
33 | function pointer, and emits diagnostics if we try to do so. |
34 | Presumably it could emit a trap and drop the call altogether. |
35 | |
36 | The aliases below are intended to bypass this. */ |
37 | |
38 | extern int atexit_alias (void (*) (void)) __asm__ ("atexit" ); |
39 | extern int at_quick_exit_alias (void (*) (void)) __asm__ ("at_quick_exit" ); |
40 | extern int on_exit_alias (void (*) (void), void *) __asm__ ("on_exit" ); |
41 | |
42 | |
43 | static void |
44 | test_bz20544_atexit (void *closure) |
45 | { |
46 | atexit_alias (NULL); /* Should assert. */ |
47 | exit (EXIT_FAILURE); |
48 | } |
49 | |
50 | static void |
51 | test_bz20544_at_quick_exit (void *closure) |
52 | { |
53 | at_quick_exit_alias (NULL); /* Should assert. */ |
54 | exit (EXIT_FAILURE); |
55 | } |
56 | |
57 | static void |
58 | test_bz20544_on_exit (void *closure) |
59 | { |
60 | on_exit_alias (NULL, NULL); /* Should assert. */ |
61 | exit (EXIT_FAILURE); |
62 | } |
63 | |
64 | static void |
65 | test_bz20544_cxa_atexit (void *closure) |
66 | { |
67 | __cxa_atexit (NULL, NULL, NULL); /* Should assert. */ |
68 | exit (EXIT_FAILURE); |
69 | } |
70 | |
71 | static void |
72 | test_bz20544_cxa_at_quick_exit (void *closure) |
73 | { |
74 | __cxa_at_quick_exit (NULL, NULL, NULL); /* Should assert. */ |
75 | exit (EXIT_FAILURE); |
76 | } |
77 | |
78 | static void |
79 | test_one_fn (void (*test_fn) (void *)) |
80 | { |
81 | const char expected_error[] = "Assertion `func != NULL' failed.\n" ; |
82 | struct support_capture_subprocess result; |
83 | result = support_capture_subprocess (callback: test_fn, NULL); |
84 | support_capture_subprocess_check (&result, context: "bz20544" , status_or_signal: -SIGABRT, |
85 | allowed: sc_allow_stderr); |
86 | |
87 | if (strstr (result.err.buffer, expected_error) == NULL) |
88 | { |
89 | support_record_failure (); |
90 | printf (format: "Did not find expected string in error output:\n" |
91 | " expected: >>>%s<<<\n" |
92 | " actual: >>>%s<<<\n" , |
93 | expected_error, result.err.buffer); |
94 | } |
95 | |
96 | support_capture_subprocess_free (&result); |
97 | } |
98 | |
99 | static int |
100 | do_test (void) |
101 | { |
102 | #if defined (NDEBUG) |
103 | FAIL_UNSUPPORTED ("Assertions disabled (NDEBUG). " |
104 | "Can't verify that assertions fire." ); |
105 | #endif |
106 | test_one_fn (test_fn: test_bz20544_atexit); |
107 | test_one_fn (test_fn: test_bz20544_at_quick_exit); |
108 | test_one_fn (test_fn: test_bz20544_on_exit); |
109 | test_one_fn (test_fn: test_bz20544_cxa_atexit); |
110 | test_one_fn (test_fn: test_bz20544_cxa_at_quick_exit); |
111 | |
112 | return 0; |
113 | } |
114 | |
115 | #include <support/test-driver.c> |
116 | |