gdb/testsuite/gdb.base/dlmopen.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2021-2023 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 */
  19
  20 #define _GNU_SOURCE
  21 #include <dlfcn.h>
  22 #include <stddef.h>
  23 #include <assert.h>
  24 #include <unistd.h>
  25
  26 volatile int wait_for_gdb = 1;
  27
  28 int
  29 main (void)
  30 {
  31   void *handle[4];
  32   int (*fun) (int);
  33   Lmid_t lmid;
  34   int dl;
  35
  36   handle[0] = dlmopen (LM_ID_NEWLM, DSO1_NAME, RTLD_LAZY | RTLD_LOCAL);
  37   assert (handle[0] != NULL);
  38
  39   dlinfo (handle[0], RTLD_DI_LMID, &lmid);
  40
  41   handle[1] = dlopen (DSO1_NAME, RTLD_LAZY | RTLD_LOCAL);
  42   assert (handle[1] != NULL);
  43
  44   handle[2] = dlmopen (LM_ID_NEWLM, DSO1_NAME, RTLD_LAZY | RTLD_LOCAL);
  45   assert (handle[2] != NULL);
  46
  47   handle[3] = dlmopen (lmid, DSO2_NAME, RTLD_LAZY | RTLD_LOCAL);
  48   assert (handle[3] != NULL);
  49
  50   alarm (20);
  51   while (wait_for_gdb != 0)
  52     usleep (1);
  53
  54   for (dl = 0; dl < 4; ++dl)
  55     {
  56       fun = dlsym (handle[dl], "inc");
  57       assert (fun != NULL);
  58
  59       fun (42);
  60
  61       dlclose (handle[dl]);
  62     }
  63
  64   return 0;  /* bp.main  */
  65 }