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87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/* Basic tests for Linux process_mrelease.
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Copyright (C) 2022-2025 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 <errno.h>
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#include <stdlib.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xsocket.h>
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#include <support/xunistd.h>
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#include <sys/mman.h>
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#include <sys/pidfd.h>
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#include <sys/wait.h>
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static void
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exit_subprocess (int dummy)
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{
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exit (EXIT_FAILURE);
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}
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static void
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subprocess (void)
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{
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/* In case something goes wrong with parent before pidfd_send_signal. */
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support_create_timer (5, 0, false, exit_subprocess);
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pause ();
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_exit (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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{
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int r = process_mrelease (-1, 0);
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TEST_COMPARE (r, -1);
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if (errno == ENOSYS)
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FAIL_UNSUPPORTED ("kernel does not support process_mrelease, "
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"skipping test");
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TEST_COMPARE (errno, EBADF);
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}
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pid_t pid = xfork ();
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if (pid == 0)
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subprocess ();
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int pidfd = pidfd_open (pid, 0);
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TEST_VERIFY (pidfd != -1);
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/* The syscall only succeeds if the target process is exiting and there
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is no guarantee that calling if after pidfd_send_signal will not error
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(ince the process might have already been reaped by the OS). So just
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check if it does fail when the process is stll running. */
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TEST_COMPARE (process_mrelease (pidfd, 0), -1);
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TEST_COMPARE (errno, EINVAL);
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TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), 0);
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{
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siginfo_t info;
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int r = waitid (P_PIDFD, pidfd, &info, WEXITED);
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TEST_COMPARE (r, 0);
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TEST_COMPARE (info.si_status, SIGKILL);
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TEST_COMPARE (info.si_code, CLD_KILLED);
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}
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TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), -1);
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TEST_COMPARE (errno, ESRCH);
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return 0;
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}
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#include <support/test-driver.c>
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