Release 4.7 tools/testing/selftests/futex/functional/futex_wait_uninitialized_heap.c
/******************************************************************************
*
* Copyright FUJITSU LIMITED 2010
* Copyright KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
*
* 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.
*
* DESCRIPTION
* Wait on uninitialized heap. It shold be zero and FUTEX_WAIT should
* return immediately. This test is intent to test zero page handling in
* futex.
*
* AUTHOR
* KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
*
* HISTORY
* 2010-Jan-6: Initial version by KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
*
*****************************************************************************/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <syscall.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <linux/futex.h>
#include <libgen.h>
#include "logging.h"
#include "futextest.h"
#define WAIT_US 5000000
static int child_blocked = 1;
static int child_ret;
void *buf;
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darren hart | darren hart | 37 | 100.00% | 1 | 100.00% |
| Total | 37 | 100.00% | 1 | 100.00% |
void *wait_thread(void *arg)
{
int res;
child_ret = RET_PASS;
res = futex_wait(buf, 1, NULL, 0);
child_blocked = 0;
if (res != 0 && errno != EWOULDBLOCK) {
error("futex failure\n", errno);
child_ret = RET_ERROR;
}
pthread_exit(NULL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darren hart | darren hart | 62 | 100.00% | 1 | 100.00% |
| Total | 62 | 100.00% | 1 | 100.00% |
int main(int argc, char **argv)
{
int c, ret = RET_PASS;
long page_size;
pthread_t thr;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
page_size = sysconf(_SC_PAGESIZE);
buf = mmap(NULL, page_size, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
if (buf == (void *)-1) {
error("mmap\n", errno);
exit(1);
}
printf("%s: Test the uninitialized futex value in FUTEX_WAIT\n",
basename(argv[0]));
ret = pthread_create(&thr, NULL, wait_thread, NULL);
if (ret) {
error("pthread_create\n", errno);
ret = RET_ERROR;
goto out;
}
info("waiting %dus for child to return\n", WAIT_US);
usleep(WAIT_US);
ret = child_ret;
if (child_blocked) {
fail("child blocked in kernel\n");
ret = RET_FAIL;
}
out:
print_result(ret);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darren hart | darren hart | 250 | 100.00% | 1 | 100.00% |
| Total | 250 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| darren hart | darren hart | 407 | 100.00% | 1 | 100.00% |
| Total | 407 | 100.00% | 1 | 100.00% |
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