1 /* Verify that MALLOC_ALIGNMENT is honored by malloc. 2 Copyright (C) 2012-2022 Free Software Foundation, Inc. 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 7 License as published by the Free Software Foundation; either 8 version 2.1 of the 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; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <inttypes.h> 22 #include <malloc-size.h> 23 #include <support/check.h> 24 25 static void * test(size_t s)26test (size_t s) 27 { 28 void *p = malloc (s); 29 30 printf ("malloc: %zu, %p: %zu\n", s, p, 31 ((uintptr_t) p) & MALLOC_ALIGN_MASK); 32 return p; 33 } 34 35 #define ALIGNED(p) (((uintptr_t) p & MALLOC_ALIGN_MASK) == 0) 36 37 static int do_test(void)38do_test (void) 39 { 40 void *p; 41 42 p = test (2); 43 TEST_VERIFY (ALIGNED (p)); 44 free (p); 45 46 p = test (8); 47 TEST_VERIFY (ALIGNED (p)); 48 free (p); 49 50 p = test (13); 51 TEST_VERIFY (ALIGNED (p)); 52 free (p); 53 54 p = test (16); 55 TEST_VERIFY (ALIGNED (p)); 56 free (p); 57 58 p = test (23); 59 TEST_VERIFY (ALIGNED (p)); 60 free (p); 61 62 p = test (43); 63 TEST_VERIFY (ALIGNED (p)); 64 free (p); 65 66 p = test (123); 67 TEST_VERIFY (ALIGNED (p)); 68 free (p); 69 70 return 0; 71 } 72 73 #include <support/test-driver.c> 74