1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <assert.h> |
19 | #include <atomic.h> |
20 | #include <ldsodefs.h> |
21 | #include <libc-pointer-arith.h> |
22 | #include <libintl.h> |
23 | #include <stdio.h> |
24 | #include <stdlib.h> |
25 | #include <sysdep.h> |
26 | #include <unistd.h> |
27 | #include <sys/mman.h> |
28 | #include <setvmaname.h> |
29 | |
30 | |
31 | extern const char *__progname; |
32 | |
33 | #include <wchar.h> |
34 | #include <libio/iolibio.h> |
35 | #define fflush(s) _IO_fflush (s) |
36 | |
37 | /* This function, when passed a string containing an asserted |
38 | expression, a filename, and a line number, prints a message |
39 | on the standard error stream of the form: |
40 | a.c:10: foobar: Assertion `a == b' failed. |
41 | It then aborts program execution via a call to `abort'. */ |
42 | |
43 | #ifdef FATAL_PREPARE_INCLUDE |
44 | # include FATAL_PREPARE_INCLUDE |
45 | #endif |
46 | |
47 | |
48 | void |
49 | __assert_fail_base (const char *fmt, const char *assertion, const char *file, |
50 | unsigned int line, const char *function) |
51 | { |
52 | char *str; |
53 | |
54 | #ifdef FATAL_PREPARE |
55 | FATAL_PREPARE; |
56 | #endif |
57 | |
58 | int total; |
59 | if (__asprintf (&str, fmt, |
60 | __progname, __progname[0] ? ": " : "" , |
61 | file, line, |
62 | function ? function : "" , function ? ": " : "" , |
63 | assertion, &total) >= 0) |
64 | { |
65 | /* Print the message. */ |
66 | (void) __fxprintf (NULL, fmt: "%s" , str); |
67 | (void) fflush (stderr); |
68 | |
69 | total = ALIGN_UP (total + sizeof (struct abort_msg_s) + 1, |
70 | GLRO(dl_pagesize)); |
71 | struct abort_msg_s *buf = __mmap (NULL, total, PROT_READ | PROT_WRITE, |
72 | MAP_ANON | MAP_PRIVATE, -1, 0); |
73 | if (__glibc_likely (buf != MAP_FAILED)) |
74 | { |
75 | buf->size = total; |
76 | strcpy (buf->msg, str); |
77 | __set_vma_name (start: buf, len: total, name: " glibc: assert" ); |
78 | |
79 | /* We have to free the old buffer since the application might |
80 | catch the SIGABRT signal. */ |
81 | struct abort_msg_s *old = atomic_exchange_acquire (&__abort_msg, buf); |
82 | |
83 | if (old != NULL) |
84 | __munmap (old, old->size); |
85 | } |
86 | |
87 | free (ptr: str); |
88 | } |
89 | else |
90 | { |
91 | /* At least print a minimal message. */ |
92 | static const char errstr[] = "Unexpected error.\n" ; |
93 | __libc_write (STDERR_FILENO, errstr, sizeof (errstr) - 1); |
94 | } |
95 | |
96 | abort (); |
97 | } |
98 | |
99 | |
100 | #undef __assert_fail |
101 | void |
102 | __assert_fail (const char *assertion, const char *file, unsigned int line, |
103 | const char *function) |
104 | { |
105 | __assert_fail_base (_("%s%s%s:%u: %s%sAssertion `%s' failed.\n%n" ), |
106 | assertion, file, line, function); |
107 | } |
108 | |