2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/******************************************************************************
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*
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* Copyright FUJITSU LIMITED 2010
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* Copyright KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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*
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* DESCRIPTION
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* Wait on uninitialized heap. It shold be zero and FUTEX_WAIT should
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* return immediately. This test is intent to test zero page handling in
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* futex.
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*
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* AUTHOR
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* KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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*
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* HISTORY
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* 2010-Jan-6: Initial version by KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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*
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*****************************************************************************/
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <syscall.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <linux/futex.h>
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#include <libgen.h>
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#include "logging.h"
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#include "futextest.h"
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#define TEST_NAME "futex-wait-uninitialized-heap"
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#define WAIT_US 5000000
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static int child_blocked = 1;
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static int child_ret;
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void *buf;
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void usage(char *prog)
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{
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printf("Usage: %s\n", prog);
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printf(" -c Use color\n");
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printf(" -h Display this help message\n");
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printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
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VQUIET, VCRITICAL, VINFO);
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}
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void *wait_thread(void *arg)
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{
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int res;
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child_ret = RET_PASS;
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res = futex_wait(buf, 1, NULL, 0);
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child_blocked = 0;
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if (res != 0 && errno != EWOULDBLOCK) {
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error("futex failure\n", errno);
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child_ret = RET_ERROR;
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}
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pthread_exit(NULL);
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}
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int main(int argc, char **argv)
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{
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int c, ret = RET_PASS;
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long page_size;
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pthread_t thr;
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while ((c = getopt(argc, argv, "chv:")) != -1) {
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switch (c) {
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case 'c':
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log_color(1);
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break;
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case 'h':
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usage(basename(argv[0]));
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exit(0);
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case 'v':
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log_verbosity(atoi(optarg));
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break;
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default:
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usage(basename(argv[0]));
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exit(1);
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}
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}
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page_size = sysconf(_SC_PAGESIZE);
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buf = mmap(NULL, page_size, PROT_READ|PROT_WRITE,
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MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
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if (buf == (void *)-1) {
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error("mmap\n", errno);
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exit(1);
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}
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ksft_print_header();
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ksft_set_plan(1);
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ksft_print_msg("%s: Test the uninitialized futex value in FUTEX_WAIT\n",
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basename(argv[0]));
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ret = pthread_create(&thr, NULL, wait_thread, NULL);
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if (ret) {
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error("pthread_create\n", errno);
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ret = RET_ERROR;
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goto out;
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}
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info("waiting %dus for child to return\n", WAIT_US);
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usleep(WAIT_US);
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ret = child_ret;
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if (child_blocked) {
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fail("child blocked in kernel\n");
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ret = RET_FAIL;
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}
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out:
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print_result(TEST_NAME, ret);
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return ret;
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}
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