1  /* Test unrelated dlopen after dlopen failure involving NODELETE.
       2     Copyright (C) 2019-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library 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 GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <dlfcn.h>
      20  #include <errno.h>
      21  #include <gnu/lib-names.h>
      22  #include <stddef.h>
      23  #include <stdio.h>
      24  #include <string.h>
      25  #include <support/check.h>
      26  #include <support/xdlfcn.h>
      27  
      28  static int
      29  do_test (void)
      30  {
      31    TEST_VERIFY (dlsym (NULL, "no_delete_mod_function") == NULL);
      32  
      33    /* This is expected to fail because of the missing dependency.  */
      34    puts ("info: attempting to load tst-dlopenfailmod1.so");
      35    TEST_VERIFY (dlopen ("tst-dlopenfailmod1.so", RTLD_LAZY) == NULL);
      36    const char *message = dlerror ();
      37    TEST_COMPARE_STRING (message,
      38                         "tst-dlopenfail-missingmod.so:"
      39                         " cannot open shared object file:"
      40                         " No such file or directory");
      41  
      42    /* Open a small shared object.  With a dangling GL (dl_initfirst)
      43       pointer, this is likely to crash because there is no longer any
      44       mapped text segment there (bug 25396).  */
      45  
      46    puts ("info: attempting to load tst-dlopenfailmod3.so");
      47    xdlclose (xdlopen ("tst-dlopenfailmod3.so", RTLD_NOW));
      48  
      49    return 0;
      50  }
      51  
      52  /* Do not perturb the dangling link map.  With M_PERTURB, the link map
      53     appears to have l_init_called set, so there are no constructor
      54     calls and no crashes.  */
      55  #define TEST_NO_MALLOPT
      56  #include <support/test-driver.c>