/* Test integer wraparound in hcreate. Copyright (C) 2016 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 <limits.h> #include <search.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <sys/resource.h> static void test_size (size_t size) { int res = hcreate (size); if (res == 0) { if (errno == ENOMEM) return; printf ("error: hcreate (%zu): %m\n", size); exit (1); } char *keys[100]; for (int i = 0; i < 100; ++i) { if (asprintf (keys + i, "%d", i) < 0) { printf ("error: asprintf: %m\n"); exit (1); } ENTRY e = { keys[i], (char *) "value" }; if (hsearch (e, ENTER) == NULL) { printf ("error: hsearch (\"%s\"): %m\n", keys[i]); exit (1); } } hdestroy (); for (int i = 0; i < 100; ++i) free (keys[i]); } static int do_test (void) { /* Limit the size of the process, so that memory allocation will fail without impacting the entire system. */ { struct rlimit limit; if (getrlimit (RLIMIT_AS, &limit) != 0) { printf ("getrlimit (RLIMIT_AS) failed: %m\n"); return 1; } long target = 100 * 1024 * 1024; if (limit.rlim_cur == RLIM_INFINITY || limit.rlim_cur > target) { limit.rlim_cur = target; if (setrlimit (RLIMIT_AS, &limit) != 0) { printf ("setrlimit (RLIMIT_AS) failed: %m\n"); return 1; } } } test_size (500); test_size (-1); test_size (-3); test_size (INT_MAX - 2); test_size (INT_MAX - 1); test_size (INT_MAX); test_size (((unsigned) INT_MAX) + 1); test_size (UINT_MAX - 2); test_size (UINT_MAX - 1); test_size (UINT_MAX); return 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"