1  /* Test that loading libpthread does not break ld.so exceptions (bug 16628).
       2     Copyright (C) 2016-2023 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 <signal.h>
      21  #include <stdio.h>
      22  #include <string.h>
      23  #include <sys/wait.h>
      24  #include <unistd.h>
      25  
      26  static int
      27  do_test (void)
      28  {
      29    void *handle = dlopen ("tst-latepthreadmod.so", RTLD_LOCAL | RTLD_LAZY);
      30    if (handle == NULL)
      31      {
      32        printf ("error: dlopen failed: %s\n", dlerror ());
      33        return 1;
      34      }
      35    void *ptr = dlsym (handle, "trigger_dynlink_failure");
      36    if (ptr == NULL)
      37      {
      38        printf ("error: dlsym failed: %s\n", dlerror ());
      39        return 1;
      40      }
      41    int (*func) (void) = ptr;
      42  
      43    /* Run the actual test in a subprocess, to capture the error.  */
      44    int fds[2];
      45    if (pipe (fds) < 0)
      46      {
      47        printf ("error: pipe: %m\n");
      48        return 1;
      49      }
      50    pid_t pid = fork ();
      51    if (pid < 0)
      52      {
      53        printf ("error: fork: %m\n");
      54        return 1;
      55      }
      56    else if (pid == 0)
      57      {
      58        if (dup2 (fds[1], STDERR_FILENO) < 0)
      59          _exit (2);
      60        /* Trigger an abort.  */
      61        func ();
      62        _exit (3);
      63      }
      64    /* NB: This assumes that the abort message is so short that the pipe
      65       does not block.  */
      66    int status;
      67    if (waitpid (pid, &status, 0) < 0)
      68      {
      69        printf ("error: waitpid: %m\n");
      70        return 1;
      71      }
      72  
      73    /* Check the printed error message.  */
      74    if (close (fds[1]) < 0)
      75     {
      76       printf ("error: close: %m\n");
      77       return 1;
      78     }
      79    char buf[512];
      80    /* Leave room for the NUL terminator.  */
      81    ssize_t ret = read (fds[0], buf, sizeof (buf) - 1);
      82    if (ret < 0)
      83      {
      84        printf ("error: read: %m\n");
      85        return 1;
      86      }
      87    if (ret > 0 && buf[ret - 1] == '\n')
      88      --ret;
      89    buf[ret] = '\0';
      90    printf ("info: exit status: %d, message: %s\n", status, buf);
      91    if (strstr (buf, "undefined symbol: this_function_is_not_defined") == NULL)
      92      {
      93        printf ("error: message does not contain expected string\n");
      94        return 1;
      95      }
      96    if (!WIFEXITED (status) || WEXITSTATUS (status) != 127)
      97      {
      98        printf ("error: unexpected process exit status\n");
      99        return 1;
     100      }
     101    return 0;
     102  }
     103  
     104  #include <support/test-driver.c>