1 /* Test fortify-source allocation size handling in pvalloc (bug 25401). 2 Copyright (C) 2020-2022 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 License as 7 published by the Free Software Foundation; either version 2.1 of the 8 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; see the file COPYING.LIB. If 17 not, see <https://www.gnu.org/licenses/>. */ 18 19 #undef _FORTIFY_SOURCE 20 #define _FORTIFY_SOURCE 2 21 #include <malloc.h> 22 #include <string.h> 23 #include <support/check.h> 24 #include <support/xunistd.h> 25 #include <unistd.h> 26 27 static int do_test(void)28do_test (void) 29 { 30 /* The test below assumes that pvalloc rounds up the allocation size 31 to at least 8. */ 32 TEST_VERIFY (xsysconf (_SC_PAGESIZE) >= 8); 33 34 void *p = pvalloc (5); 35 TEST_VERIFY_EXIT (p != NULL); 36 37 /* This is valid assuming the page size is at least 8 because 38 pvalloc rounds up the allocation size to a multiple of the page 39 size. Due to bug 25041, this used to trigger a compiler 40 warning. */ 41 strcpy (p, "abcdefg"); 42 43 asm ("" : : "g" (p) : "memory"); /* Optimization barrier. */ 44 TEST_VERIFY (malloc_usable_size (p) >= xsysconf (_SC_PAGESIZE)); 45 return 0; 46 } 47 48 #include <support/test-driver.c> 49