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/* libguestfs
* Copyright (C) 2012 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* This test is mainly aimed at libvirt: There appear to be a lot of
* cases where libvirt is racy when creating transient guests.
* Therefore this test simply launches lots of handles in parallel for
* many minutes, hoping to reveal problems in libvirt this way.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <error.h>
#include <sys/types.h>
#include <pthread.h>
#include "guestfs.h"
#include "guestfs-utils.h"
#include "ignore-value.h"
#include "getprogname.h"
#define TOTAL_TIME 600 /* Seconds, excluding launch. */
#define NR_THREADS 5
struct thread_state {
size_t thread_num; /* Thread number. */
pthread_t thread; /* Thread handle. */
int exit_status; /* Thread exit status. */
};
static struct thread_state threads[NR_THREADS];
static void *start_thread (void *) __attribute__((noreturn));
static volatile sig_atomic_t quit = 0;
static void
catch_sigint (int signal)
{
static char cleaning_up[] = "\ngot signal, cleaning up ...\n";
if (quit == 0) {
quit = 1;
ignore_value (write (2, cleaning_up, sizeof cleaning_up));
}
}
int
main (int argc, char *argv[])
{
const char *skip, *slow;
struct sigaction sa;
int r;
size_t i, errors = 0;
void *status;
srandom (time (NULL) + getpid ());
/* Only run this test when invoked by check-slow. */
slow = getenv ("SLOW");
if (!slow || guestfs_int_is_true (slow) <= 0) {
fprintf (stderr, "%s: use 'make check-slow' to run this test.\n",
getprogname ());
exit (77);
}
/* Allow the test to be skipped by setting an environment variable. */
skip = getenv ("SKIP_TEST_PARALLEL");
if (skip && guestfs_int_is_true (skip) > 0) {
fprintf (stderr, "%s: test skipped because environment variable set.\n",
getprogname ());
exit (77);
}
memset (&sa, 0, sizeof sa);
sa.sa_handler = catch_sigint;
sa.sa_flags = SA_RESTART;
sigaction (SIGINT, &sa, NULL);
sigaction (SIGQUIT, &sa, NULL);
for (i = 0; i < NR_THREADS; ++i) {
threads[i].thread_num = i;
/* Start the thread. */
r = pthread_create (&threads[i].thread, NULL, start_thread,
&threads[i]);
if (r != 0)
error (EXIT_FAILURE, r, "pthread_create");
}
/* Wait for the threads to exit. */
for (i = 0; i < NR_THREADS; ++i) {
r = pthread_join (threads[i].thread, &status);
if (r != 0)
error (EXIT_FAILURE, r, "pthread_join");
if (*(int *)status != 0) {
fprintf (stderr, "%zu: thread returned an error\n", i);
errors++;
}
}
exit (errors == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
/* Run the test in a single thread. */
static void *
start_thread (void *statevp)
{
struct thread_state *state = statevp;
guestfs_h *g;
time_t start_t, t;
char id[64];
time (&start_t);
for (;;) {
/* Keep testing until we run out of time. */
time (&t);
if (quit || t - start_t >= TOTAL_TIME)
break;
g = guestfs_create ();
if (g == NULL) {
perror ("guestfs_create");
state->exit_status = 1;
pthread_exit (&state->exit_status);
}
snprintf (id, sizeof id, "%zu", state->thread_num);
guestfs_set_identifier (g, id);
if (guestfs_add_drive_opts (g, "/dev/null",
GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw",
GUESTFS_ADD_DRIVE_OPTS_READONLY, 1,
-1) == -1) {
error:
guestfs_close (g);
state->exit_status = 1;
pthread_exit (&state->exit_status);
}
if (guestfs_launch (g) == -1)
goto error;
if (guestfs_shutdown (g) == -1)
goto error;
guestfs_close (g);
}
/* Test finished successfully. */
state->exit_status = 0;
pthread_exit (&state->exit_status);
}
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