elf/tst-latepthread.c

   1 /* Test that loading libpthread does not break ld.so exceptions (bug 16628).
   2    Copyright (C) 2016-2017 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    <http://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>