tests/dlopen/dlopen.c

   1 /* Copyright (C) 2010  Oussama El Mfadli, Alexis HallÃƒÂ©
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2.1 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  16  */
  17
  18 #include <dlfcn.h>
  19 #include <stdio.h>
  20 #include <ust/marker.h>
  21
  22 int main()
  23 {
  24         int (*fptr)();
  25
  26         trace_mark(ust, from_main_before_lib, "%s", "Event occured in the main program before"
  27                                                 " the opening of the library\n");
  28         void *lib_handle = dlopen("libdummy.so", RTLD_LAZY);
  29
  30         if (lib_handle == NULL) {
  31                 fprintf(stderr, "%s\n", dlerror());
  32                 return 1;
  33         }
  34
  35         fptr = (int (*)())dlsym(lib_handle, "exported_function");
  36
  37         if ( fptr == NULL) {
  38                 fprintf(stderr, "%s\n", dlerror());
  39                 return 1;
  40         }
  41
  42         (*fptr)();
  43         dlclose(lib_handle);
  44
  45         trace_mark(ust, from_main_after_lib,"%s", "Event occured in the main program after "
  46                                                 "the library has been closed\n");
  47
  48         return 0;
  49 }