1 /* Test of reallocarray function. 2 Copyright (C) 2010-2021 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program 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 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 #include <config.h> 18 19 /* Specification. */ 20 #include <stdlib.h> 21 22 #include <errno.h> 23 #include <stdint.h> 24 25 #include "signature.h" 26 SIGNATURE_CHECK (reallocarray, void *, (void *, size_t, size_t)); 27 28 #include "macros.h" 29 30 int 31 main () /* */ 32 { 33 /* Check that reallocarray fails when requested to allocate a block 34 of memory larger than PTRDIFF_MAX or SIZE_MAX bytes. */ 35 for (size_t n = 2; n != 0; n <<= 1) 36 { 37 void *volatile p = NULL; 38 39 if (PTRDIFF_MAX / n + 1 <= SIZE_MAX) 40 { 41 p = reallocarray (p, PTRDIFF_MAX / n + 1, n); 42 ASSERT (p == NULL); 43 ASSERT (errno == ENOMEM); 44 } 45 46 p = reallocarray (p, SIZE_MAX / n + 1, n); 47 ASSERT (p == NULL); 48 ASSERT (errno == ENOMEM 49 || errno == EOVERFLOW /* NetBSD */); 50 51 /* Reallocarray should not crash with zero sizes. */ 52 p = reallocarray (p, 0, n); 53 p = reallocarray (p, n, 0); 54 free (p); 55 } 56 57 return 0; 58 }