1 /* Ensure that malloc_usable_size returns the request size with 2 MALLOC_CHECK_ exported to a positive value. 3 4 Copyright (C) 2012-2022 Free Software Foundation, Inc. 5 Copyright The GNU Toolchain Authors. 6 This file is part of the GNU C Library. 7 8 The GNU C Library is free software; you can redistribute it and/or 9 modify it under the terms of the GNU Lesser General Public 10 License as published by the Free Software Foundation; either 11 version 2.1 of the License, or (at your option) any later version. 12 13 The GNU C Library is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 Lesser General Public License for more details. 17 18 You should have received a copy of the GNU Lesser General Public 19 License along with the GNU C Library; if not, see 20 <https://www.gnu.org/licenses/>. */ 21 22 #include <malloc.h> 23 #include <string.h> 24 #include <stdio.h> 25 #include <support/support.h> 26 #include <support/check.h> 27 28 static int do_test(void)29do_test (void) 30 { 31 size_t usable_size; 32 void *p = malloc (7); 33 34 TEST_VERIFY_EXIT (p != NULL); 35 usable_size = malloc_usable_size (p); 36 TEST_COMPARE (usable_size, 7); 37 memset (p, 0, usable_size); 38 free (p); 39 40 TEST_COMPARE (malloc_usable_size (NULL), 0); 41 42 return 0; 43 } 44 45 #include "support/test-driver.c" 46