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123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/* Test if CLONE_VM does not change pthread pid/tid field (BZ #19957)
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Copyright (C) 2021-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sched.h>
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#include <signal.h>
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#include <string.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/syscall.h>
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#include <clone_internal.h>
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#include <support/xunistd.h>
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#include <support/check.h>
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static int sig;
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static int pipefd[2];
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static int
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f (void *a)
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{
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close (pipefd[0]);
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pid_t ppid = getppid ();
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pid_t pid = getpid ();
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pid_t tid = gettid ();
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if (write (pipefd[1], &ppid, sizeof ppid) != sizeof (ppid))
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FAIL_EXIT1 ("write ppid failed\n");
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if (write (pipefd[1], &pid, sizeof pid) != sizeof (pid))
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FAIL_EXIT1 ("write pid failed\n");
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if (write (pipefd[1], &tid, sizeof tid) != sizeof (tid))
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FAIL_EXIT1 ("write tid failed\n");
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return 0;
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}
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static int
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do_test (void)
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{
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sig = SIGRTMIN;
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sigset_t ss;
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sigemptyset (&ss);
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sigaddset (&ss, sig);
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if (sigprocmask (SIG_BLOCK, &ss, NULL) != 0)
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FAIL_EXIT1 ("sigprocmask failed: %m");
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if (pipe2 (pipefd, O_CLOEXEC))
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FAIL_EXIT1 ("pipe failed: %m");
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#define STACK_SIZE 128 * 1024
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char st[STACK_SIZE] __attribute__ ((aligned));
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struct clone_args clone_args =
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{
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.stack = (uintptr_t) st,
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.stack_size = sizeof (st),
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};
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pid_t p = __clone_internal (&clone_args, f, 0);
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close (pipefd[1]);
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if (p == -1)
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FAIL_EXIT1("clone failed: %m");
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pid_t ppid, pid, tid;
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if (read (pipefd[0], &ppid, sizeof pid) != sizeof pid)
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{
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kill (p, SIGKILL);
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FAIL_EXIT1 ("read ppid failed: %m");
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}
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if (read (pipefd[0], &pid, sizeof pid) != sizeof pid)
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{
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kill (p, SIGKILL);
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FAIL_EXIT1 ("read pid failed: %m");
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}
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if (read (pipefd[0], &tid, sizeof tid) != sizeof tid)
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{
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kill (p, SIGKILL);
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FAIL_EXIT1 ("read tid failed: %m");
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}
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close (pipefd[0]);
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pid_t own_pid = getpid ();
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pid_t own_tid = syscall (__NR_gettid);
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/* Some sanity checks for clone syscall: returned ppid should be current
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pid and both returned tid/pid should be different from current one. */
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if ((ppid != own_pid) || (pid == own_pid) || (tid == own_tid))
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FAIL_RET ("ppid=%i pid=%i tid=%i | own_pid=%i own_tid=%i",
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(int)ppid, (int)pid, (int)tid, (int)own_pid, (int)own_tid);
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int e;
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xwaitpid (p, &e, __WCLONE);
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TEST_VERIFY (WIFEXITED (e));
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TEST_COMPARE (WEXITSTATUS (e), 0);
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return 0;
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}
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#include <support/test-driver.c>
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