84 lines
1.9 KiB
C
84 lines
1.9 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 "futextest.h"
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#include "../../kselftest_harness.h"
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#define WAIT_US 5000000
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static int child_blocked = 1;
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static bool child_ret;
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void *buf;
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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 = true;
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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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ksft_exit_fail_msg("futex failure\n");
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child_ret = false;
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}
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pthread_exit(NULL);
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}
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TEST(futex_wait_uninitialized_heap)
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{
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long page_size;
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pthread_t thr;
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int ret;
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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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ksft_exit_fail_msg("mmap\n");
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ret = pthread_create(&thr, NULL, wait_thread, NULL);
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if (ret)
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ksft_exit_fail_msg("pthread_create\n");
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ksft_print_dbg_msg("waiting %dus for child to return\n", WAIT_US);
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usleep(WAIT_US);
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if (child_blocked)
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ksft_test_result_fail("child blocked in kernel\n");
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if (!child_ret)
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ksft_test_result_fail("child error\n");
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}
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TEST_HARNESS_MAIN
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