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2e0bbbfb | 1 | /* Change the size of an allocated block. |
688903eb | 2 | Copyright (C) 2017-2018 Free Software Foundation, Inc. |
2e0bbbfb DW |
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 License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | 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; see the file COPYING.LIB. If | |
17 | not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <malloc.h> | |
2e0bbbfb DW |
21 | |
22 | void * | |
23 | __libc_reallocarray (void *optr, size_t nmemb, size_t elem_size) | |
24 | { | |
25 | size_t bytes; | |
0253580a | 26 | if (__builtin_mul_overflow (nmemb, elem_size, &bytes)) |
2e0bbbfb DW |
27 | { |
28 | __set_errno (ENOMEM); | |
29 | return 0; | |
30 | } | |
0253580a | 31 | return realloc (optr, bytes); |
2e0bbbfb DW |
32 | } |
33 | libc_hidden_def (__libc_reallocarray) | |
34 | ||
35 | weak_alias (__libc_reallocarray, reallocarray) |