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a2ffc2c4 | 1 | /* Memory management routines. |
fbd26352 | 2 | Copyright (C) 2002-2019 Free Software Foundation, Inc. |
4ee9c684 | 3 | Contributed by Paul Brook <paul@nowt.org> |
4 | ||
5e62a3cc | 5 | This file is part of the GNU Fortran runtime library (libgfortran). |
4ee9c684 | 6 | |
b417ea8c | 7 | Libgfortran is free software; you can redistribute it and/or |
8 | modify it under the terms of the GNU General Public | |
4ee9c684 | 9 | License as published by the Free Software Foundation; either |
6bc9506f | 10 | version 3 of the License, or (at your option) any later version. |
b417ea8c | 11 | |
12 | Libgfortran is distributed in the hope that it will be useful, | |
4ee9c684 | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
b417ea8c | 15 | GNU General Public License for more details. |
4ee9c684 | 16 | |
6bc9506f | 17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
4ee9c684 | 25 | |
4ee9c684 | 26 | #include "libgfortran.h" |
af1e9051 | 27 | #include <errno.h> |
28 | ||
4ee9c684 | 29 | |
4ee9c684 | 30 | void * |
25c067ae | 31 | xmalloc (size_t n) |
4ee9c684 | 32 | { |
33 | void *p; | |
34 | ||
25c067ae | 35 | if (n == 0) |
36 | n = 1; | |
37 | ||
38 | p = malloc (n); | |
39 | ||
4ee9c684 | 40 | if (p == NULL) |
41 | os_error ("Memory allocation failed"); | |
42 | ||
43 | return p; | |
44 | } | |
45 | ||
46 | ||
af1e9051 | 47 | void * |
48 | xmallocarray (size_t nmemb, size_t size) | |
49 | { | |
50 | void *p; | |
6bc936d3 | 51 | size_t prod; |
af1e9051 | 52 | |
53 | if (!nmemb || !size) | |
6bc936d3 | 54 | prod = 1; |
55 | else if (__builtin_mul_overflow (nmemb, size, &prod)) | |
af1e9051 | 56 | { |
57 | errno = ENOMEM; | |
58 | os_error ("Integer overflow in xmallocarray"); | |
59 | } | |
60 | ||
6bc936d3 | 61 | p = malloc (prod); |
af1e9051 | 62 | |
63 | if (!p) | |
64 | os_error ("Memory allocation failed in xmallocarray"); | |
65 | ||
66 | return p; | |
67 | } | |
68 | ||
69 | ||
33123ed7 | 70 | /* calloc wrapper that aborts on error. */ |
71 | ||
72 | void * | |
73 | xcalloc (size_t nmemb, size_t size) | |
74 | { | |
af1e9051 | 75 | if (!nmemb || !size) |
33123ed7 | 76 | nmemb = size = 1; |
77 | ||
78 | void *p = calloc (nmemb, size); | |
79 | if (!p) | |
80 | os_error ("Allocating cleared memory failed"); | |
81 | ||
82 | return p; | |
83 | } | |
3e52c822 | 84 | |
85 | ||
86 | void * | |
87 | xrealloc (void *ptr, size_t size) | |
88 | { | |
89 | if (size == 0) | |
90 | size = 1; | |
91 | ||
92 | void *newp = realloc (ptr, size); | |
93 | if (!newp) | |
94 | os_error ("Memory allocation failure in xrealloc"); | |
95 | ||
96 | return newp; | |
97 | } |