1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2011-2020 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program 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 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #include <dlfcn.h> 19 #include <stddef.h> 20 #include <assert.h> 21 22 static const char *volatile filename; 23 24 static void 25 notify (void) 26 { 27 filename = NULL; /* notify-here */ 28 } 29 30 int 31 main (void) 32 { 33 void *h; 34 void (*fp) (void (*) (void)); 35 36 assert (filename != NULL); 37 h = dlopen (filename, RTLD_LAZY); 38 assert (h != NULL); 39 40 fp = dlsym (h, "f"); 41 assert (fp != NULL); 42 43 fp (notify); 44 45 return 0; 46 } 47