| /* Copyright (C) 2013-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <malloc.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| static int errors = 0; |
| |
| static void |
| merror (const char *msg) |
| { |
| ++errors; |
| printf ("Error: %s\n", msg); |
| } |
| |
| static int |
| do_test (void) |
| { |
| void *p; |
| unsigned char *c; |
| int save, i, ok; |
| |
| errno = 0; |
| |
| /* realloc (NULL, ...) behaves similarly to malloc (C89). */ |
| p = realloc (NULL, -1); |
| save = errno; |
| |
| if (p != NULL) |
| merror ("realloc (NULL, -1) succeeded."); |
| |
| /* errno should be set to ENOMEM on failure (POSIX). */ |
| if (p == NULL && save != ENOMEM) |
| merror ("errno is not set correctly"); |
| |
| errno = 0; |
| |
| /* realloc (NULL, ...) behaves similarly to malloc (C89). */ |
| p = realloc (NULL, 10); |
| save = errno; |
| |
| if (p == NULL) |
| merror ("realloc (NULL, 10) failed."); |
| |
| /* errno should be clear on success (POSIX). */ |
| if (p != NULL && save != 0) |
| merror ("errno is set but should not be"); |
| |
| free (p); |
| |
| p = calloc (20, 1); |
| if (p == NULL) |
| merror ("calloc (20, 1) failed."); |
| |
| /* Check increasing size preserves contents (C89). */ |
| p = realloc (p, 200); |
| if (p == NULL) |
| merror ("realloc (p, 200) failed."); |
| |
| c = p; |
| ok = 1; |
| |
| for (i = 0; i < 20; i++) |
| { |
| if (c[i] != 0) |
| ok = 0; |
| } |
| |
| if (ok == 0) |
| merror ("first 20 bytes were not cleared"); |
| |
| free (p); |
| |
| p = realloc (NULL, 100); |
| if (p == NULL) |
| merror ("realloc (NULL, 100) failed."); |
| |
| memset (p, 0xff, 100); |
| |
| /* Check decreasing size preserves contents (C89). */ |
| p = realloc (p, 16); |
| if (p == NULL) |
| merror ("realloc (p, 16) failed."); |
| |
| c = p; |
| ok = 1; |
| |
| for (i = 0; i < 16; i++) |
| { |
| if (c[i] != 0xff) |
| ok = 0; |
| } |
| |
| if (ok == 0) |
| merror ("first 16 bytes were not correct"); |
| |
| /* Check failed realloc leaves original untouched (C89). */ |
| c = realloc (p, -1); |
| if (c != NULL) |
| merror ("realloc (p, -1) succeeded."); |
| |
| c = p; |
| ok = 1; |
| |
| for (i = 0; i < 16; i++) |
| { |
| if (c[i] != 0xff) |
| ok = 0; |
| } |
| |
| if (ok == 0) |
| merror ("first 16 bytes were not correct after failed realloc"); |
| |
| /* realloc (p, 0) frees p (C89) and returns NULL (glibc). */ |
| p = realloc (p, 0); |
| if (p != NULL) |
| merror ("realloc (p, 0) returned non-NULL."); |
| |
| /* realloc (NULL, 0) acts like malloc (0) (glibc). */ |
| p = realloc (NULL, 0); |
| if (p == NULL) |
| merror ("realloc (NULL, 0) returned NULL."); |
| |
| free (p); |
| |
| return errors != 0; |
| } |
| |
| #define TEST_FUNCTION do_test () |
| #include "../test-skeleton.c" |