mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
11f09947f3
So far this test checks if pidfd_open-syscall is supported, which was introduced with linux 5.3. The process_madvise-syscall was introduced with linux 5.10. Thus you'll get FAILs if you are running a kernel in between. This patch adds a check if the first process_madvise-syscall returns ENOSYS and in this case will fail with UNSUPPORTED. Reviewed-by: Florian Weimer <fweimer@redhat.com>
145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/* Basic tests for Linux process_madvise.
|
|
Copyright (C) 2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <array_length.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <support/check.h>
|
|
#include <support/process_state.h>
|
|
#include <support/support.h>
|
|
#include <support/xsocket.h>
|
|
#include <support/xunistd.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/pidfd.h>
|
|
#include <sys/wait.h>
|
|
|
|
/* The pair of sockets used for coordination. The subprocess uses
|
|
sockets[1]. */
|
|
static int sockets[2];
|
|
|
|
static long int page_size;
|
|
|
|
static void
|
|
exit_subprocess (int dummy)
|
|
{
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
|
|
static void
|
|
subprocess (void)
|
|
{
|
|
/* In case something goes wrong with parent before pidfd_send_signal. */
|
|
support_create_timer (5, 0, false, exit_subprocess);
|
|
|
|
void *p1 = xmmap (NULL, page_size * 2, PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1);
|
|
|
|
void *p2 = xmmap (NULL, page_size, PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1);
|
|
xmunmap(p2, page_size);
|
|
|
|
xsendto (sockets[1], &(struct iovec) { p1, page_size * 2 },
|
|
sizeof (struct iovec), 0, NULL, 0);
|
|
|
|
xsendto (sockets[1], &(struct iovec) { p2, page_size },
|
|
sizeof (struct iovec), 0, NULL, 0);
|
|
|
|
pause ();
|
|
|
|
_exit (0);
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
page_size = sysconf (_SC_PAGE_SIZE);
|
|
|
|
{
|
|
int r = pidfd_open (-1, 0);
|
|
TEST_COMPARE (r, -1);
|
|
if (errno == ENOSYS)
|
|
FAIL_UNSUPPORTED ("kernel does not support pidfd_open, skipping test");
|
|
|
|
TEST_COMPARE (errno, EINVAL);
|
|
}
|
|
|
|
TEST_COMPARE (socketpair (AF_UNIX, SOCK_STREAM, 0, sockets), 0);
|
|
|
|
pid_t pid = xfork ();
|
|
if (pid == 0)
|
|
{
|
|
xclose (sockets[0]);
|
|
subprocess ();
|
|
}
|
|
xclose (sockets[1]);
|
|
|
|
int pidfd = pidfd_open (pid, 0);
|
|
TEST_VERIFY (pidfd != -1);
|
|
|
|
/* The target process is going to send us two iovec's. The first one points
|
|
to a valid mapping, the other points to a previously valid mapping which
|
|
has now been unmapped. */
|
|
{
|
|
struct iovec iv;
|
|
xrecvfrom (sockets[0], &iv, sizeof (iv), 0, NULL, 0);
|
|
|
|
/* We expect this to succeed in the target process because the mapping
|
|
is valid. */
|
|
ssize_t ret = process_madvise (pidfd, &iv, 1, MADV_COLD, 0);
|
|
if (ret == -1 && errno == ENOSYS)
|
|
FAIL_UNSUPPORTED ("kernel does not support process_madvise, skipping"
|
|
"test");
|
|
TEST_COMPARE (ret, 2 * page_size);
|
|
}
|
|
|
|
{
|
|
struct iovec iv;
|
|
xrecvfrom (sockets[0], &iv, sizeof (iv), 0, NULL, 0);
|
|
|
|
/* We expect this to fail in the target process because the second iovec
|
|
points to an unmapped region. The target process arranges for this to
|
|
be the case. */
|
|
TEST_COMPARE (process_madvise (pidfd, &iv, 1, MADV_COLD, 0), -1);
|
|
TEST_COMPARE (errno, ENOMEM);
|
|
}
|
|
|
|
{
|
|
struct iovec iv[IOV_MAX + 1];
|
|
TEST_COMPARE (process_madvise (pidfd, iv, array_length (iv), MADV_COLD,
|
|
0), -1);
|
|
TEST_COMPARE (errno, EINVAL);
|
|
}
|
|
|
|
TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), 0);
|
|
{
|
|
siginfo_t info;
|
|
int r = waitid (P_PIDFD, pidfd, &info, WEXITED);
|
|
TEST_COMPARE (r, 0);
|
|
TEST_COMPARE (info.si_status, SIGKILL);
|
|
TEST_COMPARE (info.si_code, CLD_KILLED);
|
|
}
|
|
|
|
TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), -1);
|
|
TEST_COMPARE (errno, ESRCH);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|