sysdeps/unix/sysv/linux/tst-getpid1-internal.c

   1 /* Verify that the parent pid is unchanged by __clone_internal.
   2    Copyright (C) 2021-2023 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 <sched.h>
  20 #include <signal.h>
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include <unistd.h>
  24 #include <sys/types.h>
  25 #include <sys/wait.h>
  26 #include <clone_internal.h>
  27 #include <support/xunistd.h>
  28
  29 #ifndef TEST_CLONE_FLAGS
  30 #define TEST_CLONE_FLAGS 0
  31 #endif
  32
  33 static int sig;
  34
  35 static int
  36 f (void *a)
  37 {
  38   puts ("in f");
  39   union sigval sival;
  40   sival.sival_int = getpid ();
  41   printf ("pid = %d\n", sival.sival_int);
  42   if (sigqueue (getppid (), sig, sival) != 0)
  43     return 1;
  44   return 0;
  45 }
  46
  47
  48 static int
  49 do_test (void)
  50 {
  51   int mypid = getpid ();
  52
  53   sig = SIGRTMIN;
  54   sigset_t ss;
  55   sigemptyset (&ss);
  56   sigaddset (&ss, sig);
  57   if (sigprocmask (SIG_BLOCK, &ss, NULL) != 0)
  58     {
  59       printf ("sigprocmask failed: %m\n");
  60       return 1;
  61     }
  62
  63 #ifdef __ia64__
  64 # define STACK_SIZE 256 * 1024
  65 #else
  66 # define STACK_SIZE 128 * 1024
  67 #endif
  68   char st[STACK_SIZE] __attribute__ ((aligned));
  69   struct clone_args clone_args =
  70     {
  71       .flags = TEST_CLONE_FLAGS & ~CSIGNAL,
  72       .exit_signal = TEST_CLONE_FLAGS & CSIGNAL,
  73       .stack = (uintptr_t) st,
  74       .stack_size = sizeof (st),
  75     };
  76   pid_t p = __clone_internal (&clone_args, f, 0);
  77   if (p == -1)
  78     {
  79       printf("clone failed: %m\n");
  80       return 1;
  81     }
  82   printf ("new thread: %d\n", (int) p);
  83
  84   siginfo_t si;
  85   do
  86     if (sigwaitinfo (&ss, &si) < 0)
  87       {
  88         printf("sigwaitinfo failed: %m\n");
  89         kill (p, SIGKILL);
  90         return 1;
  91       }
  92   while  (si.si_signo != sig || si.si_code != SI_QUEUE);
  93
  94   int e;
  95   xwaitpid (p, &e, __WCLONE);
  96   if (!WIFEXITED (e))
  97     {
  98       if (WIFSIGNALED (e))
  99         printf ("died from signal %s\n", strsignal (WTERMSIG (e)));
 100       else
 101         puts ("did not terminate correctly");
 102       return 1;
 103     }
 104   if (WEXITSTATUS (e) != 0)
 105     {
 106       printf ("exit code %d\n", WEXITSTATUS (e));
 107       return 1;
 108     }
 109
 110   if (si.si_int != (int) p)
 111     {
 112       printf ("expected PID %d, got si_int %d\n", (int) p, si.si_int);
 113       kill (p, SIGKILL);
 114       return 1;
 115     }
 116
 117   if (si.si_pid != p)
 118     {
 119       printf ("expected PID %d, got si_pid %d\n", (int) p, (int) si.si_pid);
 120       kill (p, SIGKILL);
 121       return 1;
 122     }
 123
 124   if (getpid () != mypid)
 125     {
 126       puts ("my PID changed");
 127       return 1;
 128     }
 129
 130   return 0;
 131 }
 132
 133 #include <support/test-driver.c>