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      1 /* This testcase is part of GDB, the GNU debugger.
      2 
      3    Copyright 2021-2024 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 }
     66