From patchwork Mon Nov 26 08:21:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Stancek X-Patchwork-Id: 1003055 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=lists.linux.it (client-ip=213.254.12.146; helo=picard.linux.it; envelope-from=ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 433Kdc61nGz9s5c for ; Mon, 26 Nov 2018 19:21:53 +1100 (AEDT) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 000543E60E2 for ; Mon, 26 Nov 2018 09:21:47 +0100 (CET) X-Original-To: ltp@lists.linux.it Delivered-To: ltp@picard.linux.it Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [217.194.8.6]) by picard.linux.it (Postfix) with ESMTP id C04CC3E60A9 for ; Mon, 26 Nov 2018 09:21:45 +0100 (CET) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by in-6.smtp.seeweb.it (Postfix) with ESMTPS id E21F114016DD for ; Mon, 26 Nov 2018 09:21:42 +0100 (CET) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DE77FC049D4B for ; Mon, 26 Nov 2018 08:21:39 +0000 (UTC) Received: from dustball.brq.redhat.com (unknown [10.43.17.9]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0D2895C21D; Mon, 26 Nov 2018 08:21:38 +0000 (UTC) From: Jan Stancek To: ltp@lists.linux.it Date: Mon, 26 Nov 2018 09:21:34 +0100 Message-Id: <0e62adebbb4e5c8e3aa28440f860234b937d3e56.1543219161.git.jstancek@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Mon, 26 Nov 2018 08:21:39 +0000 (UTC) X-Virus-Scanned: clamav-milter 0.99.2 at in-6.smtp.seeweb.it X-Virus-Status: Clean X-Spam-Status: No, score=-0.0 required=7.0 tests=SPF_HELO_PASS,SPF_PASS autolearn=disabled version=3.4.0 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on in-6.smtp.seeweb.it Cc: liwan@redhat.com Subject: [LTP] [PATCH v2] mtest06/mmap1: rewrite to newlib X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.18 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it Sender: "ltp" Fixes: #165 This patch is aiming to rewrite mtest06/mmap1 from scratch, to address sporadic failures in #165. Main difference is that it uses only one signal handler and no synchronization between threads, no sched_yield calls. Instead each mmap/munmap increases a map/unmap counter. Upon hitting SIGSEGV or when comparing read value, these counter values are used to determine state of mapped area as observed by first thread. This isn't 100% accurrate as first thread might be faster than the check, but it allows second thread to race against map/unmap for its entire duration. Signed-off-by: Jan Stancek Reviewed-by: Li Wang --- Changes in v2: - add suggestion by Li to write/check for 'b' - drop parameter from runtest file runtest/mm | 2 +- testcases/kernel/mem/mtest06/mmap1.c | 676 +++++++++++++---------------------- 2 files changed, 250 insertions(+), 428 deletions(-) rewrite testcases/kernel/mem/mtest06/mmap1.c (93%) diff --git a/runtest/mm b/runtest/mm index 76d2335622df..a09f39c1e02c 100644 --- a/runtest/mm +++ b/runtest/mm @@ -14,7 +14,7 @@ mtest01w mtest01 -p80 -w #test for race conditions mtest05 mmstress -mtest06 mmap1 -x 0.05 +mtest06 mmap1 mtest06_2 mmap2 -x 0.002 -a -p mtest06_3 mmap3 -x 0.002 -p # Remains diabled till the infinite loop problem is solved diff --git a/testcases/kernel/mem/mtest06/mmap1.c b/testcases/kernel/mem/mtest06/mmap1.c dissimilarity index 93% index 80889676d96a..91c050949673 100644 --- a/testcases/kernel/mem/mtest06/mmap1.c +++ b/testcases/kernel/mem/mtest06/mmap1.c @@ -1,427 +1,249 @@ -/******************************************************************************/ -/* */ -/* Copyright (c) International Business Machines Corp., 2001 */ -/* Copyright (c) 2001 Manoj Iyer */ -/* Copyright (c) 2003 Robbie Williamson */ -/* Copyright (c) 2004 Paul Larson */ -/* Copyright (c) 2007 */ -/* Copyright (c) 2007 Suzuki K P */ -/* Copyright (c) 2011 Cyril Hrubis */ -/* */ -/* 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 */ -/* */ -/******************************************************************************/ -/******************************************************************************/ -/* Description: Test the LINUX memory manager. The program is aimed at */ -/* stressing the memory manager by simultanious map/unmap/read */ -/* by light weight processes, the test is scheduled to run for */ -/* a mininum of 24 hours. */ -/* */ -/* Create two light weight processes X and Y. */ -/* X - maps, writes and unmap a file in a loop. */ -/* Y - read from this mapped region in a loop. */ -/* read must be a success between map and unmap of the region. */ -/* */ -/******************************************************************************/ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include "test.h" -#include "safe_macros.h" - -#define DISTANT_MMAP_SIZE (64*1024*1024) -#define OPT_MISSING(prog, opt) do { \ - fprintf(stderr, "%s: option -%c ", prog, opt); \ - fprintf(stderr, "requires an argument\n"); \ - usage(prog); \ -} while (0) - -#define TEST_FILENAME "ashfile" - -static int verbose_print = 0; -static char *volatile map_address; -static jmp_buf jmpbuf; -static volatile char read_lock = 0; -static void *distant_area; - -char *TCID = "mmap1"; -int TST_TOTAL = 1; - -static void sig_handler(int signal, siginfo_t * info, void *ut) -{ - switch (signal) { - case SIGALRM: - tst_resm(TPASS, "Test ended, success"); - _exit(TPASS); - case SIGSEGV: - longjmp(jmpbuf, 1); - break; - default: - fprintf(stderr, "Unexpected signal - %d --- exiting\n", signal); - _exit(TBROK); - } -} - -/* - * Signal handler that is active, when file is mapped, eg. we do not expect - * SIGSEGV to be delivered. - */ -static void sig_handler_mapped(int signal, siginfo_t * info, void *ut) -{ - switch (signal) { - case SIGALRM: - tst_resm(TPASS, "Test ended, success"); - _exit(TPASS); - case SIGSEGV: - tst_resm(TINFO, "[%lu] Unexpected page fault at %p", - pthread_self(), info->si_addr); - _exit(TFAIL); - break; - default: - fprintf(stderr, "Unexpected signal - %d --- exiting\n", signal); - _exit(TBROK); - } -} - -int mkfile(int size) -{ - int fd, i; - - fd = open(TEST_FILENAME, O_RDWR | O_CREAT, 0600); - if (fd < 0) - tst_brkm(TBROK | TERRNO, NULL, "open for %s failed", - TEST_FILENAME); - - unlink(TEST_FILENAME); - - for (i = 0; i < size; i++) - if (write(fd, "a", 1) == -1) - tst_brkm(TBROK | TERRNO, NULL, "write() failed"); - - if (write(fd, "\0", 1) == -1) - tst_brkm(TBROK | TERRNO, NULL, "write() failed"); - - if (fsync(fd) == -1) - tst_brkm(TBROK | TERRNO, NULL, "fsync() failed"); - - return fd; -} - -void *map_write_unmap(void *ptr) -{ - struct sigaction sa; - long *args = ptr; - long i; - int j; - - tst_resm(TINFO, "[%lu] - map, change contents, unmap files %ld times", - pthread_self(), args[2]); - - if (verbose_print) - tst_resm(TINFO, "map_write_unmap() arguments are: " - "fd - arg[0]: %ld; " - "size of file - arg[1]: %ld; " - "num of map/write/unmap - arg[2]: %ld", - args[0], args[1], args[2]); - - for (i = 0; i < args[2]; i++) { - map_address = mmap(distant_area, (size_t) args[1], - PROT_WRITE | PROT_READ, MAP_SHARED, (int)args[0], 0); - - if (map_address == (void *)-1) { - perror("map_write_unmap(): mmap()"); - pthread_exit((void *)1); - } - - while (read_lock) - sched_yield(); - - sigfillset(&sa.sa_mask); - sigdelset(&sa.sa_mask, SIGSEGV); - sa.sa_flags = SA_SIGINFO | SA_NODEFER; - sa.sa_sigaction = sig_handler_mapped; - - if (sigaction(SIGSEGV, &sa, NULL)) { - perror("map_write_unmap(): sigaction()"); - pthread_exit((void *)1); - } - - if (verbose_print) - tst_resm(TINFO, "map address = %p", map_address); - - for (j = 0; j < args[1]; j++) { - map_address[j] = 'a'; - if (random() % 2) - sched_yield(); - } - - if (verbose_print) - tst_resm(TINFO, - "[%ld] times done: of total [%ld] iterations, " - "map_write_unmap():memset() content of memory = %s", - i, args[2], (char *)map_address); - - sigfillset(&sa.sa_mask); - sigdelset(&sa.sa_mask, SIGSEGV); - sa.sa_flags = SA_SIGINFO | SA_NODEFER; - sa.sa_sigaction = sig_handler; - - if (sigaction(SIGSEGV, &sa, NULL)) { - perror("map_write_unmap(): sigaction()"); - pthread_exit((void *)1); - } - - if (munmap(map_address, (size_t) args[1]) == -1) { - perror("map_write_unmap(): mmap()"); - pthread_exit((void *)1); - } - } - - pthread_exit(NULL); -} - -void *read_mem(void *ptr) -{ - long i; - long *args = ptr; - int j; - - tst_resm(TINFO, "[%lu] - read contents of memory %p %ld times", - pthread_self(), map_address, args[2]); - - if (verbose_print) - tst_resm(TINFO, "read_mem() arguments are: " - "number of reads to be performed - arg[2]: %ld; " - "read from address %p", args[2], map_address); - - for (i = 0; i < args[2]; i++) { - - if (verbose_print) - tst_resm(TINFO, "read_mem() in while loop %ld times " - "to go %ld times", i, args[2]); - - if (setjmp(jmpbuf) == 1) { - read_lock = 0; - if (verbose_print) - tst_resm(TINFO, "page fault occurred due to " - "a read after an unmap"); - } else { - if (verbose_print) { - read_lock = 1; - tst_resm(TINFO, - "read_mem(): content of memory: %s", - (char *)map_address); - read_lock = 0; - } - for (j = 0; j < args[1]; j++) { - read_lock = 1; - if (map_address[j] != 'a') - pthread_exit((void *)-1); - read_lock = 0; - if (random() % 2) - sched_yield(); - } - } - } - - pthread_exit(NULL); -} - -static void usage(char *progname) -{ - fprintf(stderr, "Usage: %s -d -l -s -v -x\n" - "\t -h help, usage message.\n" - "\t -l number of mmap/write/unmap default: 1000\n" - "\t -s size of the file to be mmapped default: 1024 bytes\n" - "\t -v print more info. default: quiet\n" - "\t -x test execution time default: 24 Hrs\n", - progname); - - exit(-1); -} - -struct signal_info { - int signum; - char *signame; -}; - -static struct signal_info sig_info[] = { - {SIGHUP, "SIGHUP"}, - {SIGINT, "SIGINT"}, - {SIGQUIT, "SIGQUIT"}, - {SIGABRT, "SIGABRT"}, - {SIGBUS, "SIGBUS"}, - {SIGSEGV, "SIGSEGV"}, - {SIGALRM, "SIGALRM"}, - {SIGUSR1, "SIGUSR1"}, - {SIGUSR2, "SIGUSR2"}, - {-1, "ENDSIG"} -}; - -int main(int argc, char **argv) -{ - int c, i; - int file_size; - int num_iter; - double exec_time; - int fd; - void *status; - pthread_t thid[2]; - long chld_args[3]; - extern char *optarg; - struct sigaction sigptr; - int ret; - - /* set up the default values */ - file_size = 1024; - num_iter = 1000; - exec_time = 24; - - while ((c = getopt(argc, argv, "hvl:s:x:")) != -1) { - switch (c) { - case 'h': - usage(argv[0]); - break; - case 'l': - if ((num_iter = atoi(optarg)) == 0) - OPT_MISSING(argv[0], optopt); - else if (num_iter < 0) - printf - ("WARNING: bad argument. Using default %d\n", - (num_iter = 1000)); - break; - case 's': - if ((file_size = atoi(optarg)) == 0) - OPT_MISSING(argv[0], optopt); - else if (file_size < 0) - printf - ("WARNING: bad argument. Using default %d\n", - (file_size = 1024)); - break; - case 'v': - verbose_print = 1; - break; - case 'x': - exec_time = atof(optarg); - if (exec_time == 0) - OPT_MISSING(argv[0], optopt); - else if (exec_time < 0) - printf - ("WARNING: bad argument. Using default %.0f\n", - (exec_time = 24)); - break; - default: - usage(argv[0]); - break; - } - } - - /* We don't want other mmap calls to map into same area as is - * used for test (mmap_address). The test expects read to return - * test pattern or read must fail with SIGSEGV. Find an area - * that we can use, which is unlikely to be chosen for other - * mmap calls. */ - distant_area = mmap(0, DISTANT_MMAP_SIZE, PROT_WRITE | PROT_READ, - MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); - if (distant_area == (void *)-1) - tst_brkm(TBROK | TERRNO, NULL, "distant_area: mmap()"); - SAFE_MUNMAP(NULL, distant_area, (size_t)DISTANT_MMAP_SIZE); - distant_area += DISTANT_MMAP_SIZE / 2; - - if (verbose_print) - tst_resm(TINFO, "Input parameters are: File size: %d; " - "Scheduled to run: %lf hours; " - "Number of mmap/write/read: %d", - file_size, exec_time, num_iter); - - alarm(exec_time * 3600); - - /* Do not mask SIGSEGV, as we are interested in handling it. */ - sigptr.sa_sigaction = sig_handler; - sigfillset(&sigptr.sa_mask); - sigdelset(&sigptr.sa_mask, SIGSEGV); - sigptr.sa_flags = SA_SIGINFO | SA_NODEFER; - - for (i = 0; sig_info[i].signum != -1; i++) { - if (sigaction(sig_info[i].signum, &sigptr, NULL) == -1) { - perror("man(): sigaction()"); - fprintf(stderr, - "could not set handler for %s, errno = %d\n", - sig_info[i].signame, errno); - exit(-1); - } - } - - tst_tmpdir(); - - for (;;) { - if ((fd = mkfile(file_size)) == -1) - tst_brkm(TBROK, NULL, - "main(): mkfile(): Failed to create temp file"); - - if (verbose_print) - tst_resm(TINFO, "Tmp file created"); - - chld_args[0] = fd; - chld_args[1] = file_size; - chld_args[2] = num_iter; - - if ((ret = - pthread_create(&thid[0], NULL, map_write_unmap, - chld_args))) - tst_brkm(TBROK, NULL, "main(): pthread_create(): %s", - strerror(ret)); - - tst_resm(TINFO, "created writing thread[%lu]", thid[0]); - - if ((ret = pthread_create(&thid[1], NULL, read_mem, chld_args))) - tst_brkm(TBROK, NULL, "main(): pthread_create(): %s", - strerror(ret)); - - tst_resm(TINFO, "created reading thread[%lu]", thid[1]); - - for (i = 0; i < 2; i++) { - if ((ret = pthread_join(thid[i], &status))) - tst_brkm(TBROK, NULL, - "main(): pthread_join(): %s", - strerror(ret)); - - if (status) - tst_brkm(TFAIL, NULL, - "thread [%lu] - process exited " - "with %ld", thid[i], (long)status); - } - - close(fd); - } - - tst_rmdir(); - - exit(0); -} +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2018 Jan Stancek. All rights reserved. + */ +/* + * Test: Spawn 2 threads. First thread maps, writes and unmaps + * an area. Second thread tries to read from it. Second thread + * races against first thread. There is no synchronization + * between threads, but each mmap/munmap increases a counter + * that is checked to determine when has read occurred. If a read + * hit SIGSEGV in between mmap/munmap it is a failure. If a read + * between mmap/munmap worked, then its value must match expected + * value. + */ +#include +#include +#include +#include +#include +#include +#include +#include "tst_test.h" +#include "tst_safe_pthread.h" + +#define DISTANT_MMAP_SIZE (64*1024*1024) +#define TEST_FILENAME "ashfile" + +/* seconds remaining before reaching timeout */ +#define STOP_THRESHOLD 10 + +#define PROGRESS_SEC 3 + +static int file_size = 1024; +static int num_iter = 5000; +static float exec_time = 0.05; /* default is 3 min */ + +static void *distant_area; +static char *str_exec_time; +static jmp_buf jmpbuf; +static volatile unsigned char *map_address; +static unsigned long page_sz; + +static unsigned long mapped_sigsegv_count; +static unsigned long map_count; +static unsigned long threads_spawned; +static unsigned long data_matched; +static unsigned long repeated_reads; + +/* sequence id for each map/unmap performed */ +static int mapcnt, unmapcnt; +/* stored sequence id before making read attempt */ +static int br_map, br_unmap; + +static struct tst_option options[] = { + {"x:", &str_exec_time, "Exec time (hours)"}, + {NULL, NULL, NULL} +}; + +/* compare "before read" counters with "after read" counters */ +static inline int was_area_mapped(int br_m, int br_u, int ar_m, int ar_u) +{ + return (br_m == ar_m && br_u == ar_u && br_m > br_u); +} + +static void sig_handler(int signal, siginfo_t *info, + LTP_ATTRIBUTE_UNUSED void *ut) +{ + int ar_m, ar_u; + + switch (signal) { + case SIGSEGV: + /* if we hit SIGSEGV between map/unmap, something is wrong */ + ar_u = tst_atomic_load(&unmapcnt); + ar_m = tst_atomic_load(&mapcnt); + if (was_area_mapped(br_map, br_unmap, ar_m, ar_u)) { + tst_res(TFAIL, "got sigsegv while mapped"); + _exit(TFAIL); + } + + mapped_sigsegv_count++; + longjmp(jmpbuf, 1); + break; + default: + tst_res(TFAIL, "Unexpected signal - %d, addr: %p, exiting\n", + signal, info->si_addr); + _exit(TBROK); + } +} + +void *map_write_unmap(void *ptr) +{ + long *args = ptr; + void *tmp; + int i, j; + + for (i = 0; i < num_iter; i++) { + map_address = SAFE_MMAP(distant_area, + (size_t) file_size, PROT_WRITE | PROT_READ, + MAP_SHARED, (int)args[0], 0); + tst_atomic_inc(&mapcnt); + + for (j = 0; j < file_size; j++) + map_address[j] = 'b'; + + tmp = (void *)map_address; + tst_atomic_inc(&unmapcnt); + SAFE_MUNMAP(tmp, file_size); + + map_count++; + } + + return NULL; +} + +void *read_mem(LTP_ATTRIBUTE_UNUSED void *ptr) +{ + int i, j, ar_map, ar_unmap; + unsigned char c; + + for (i = 0; i < num_iter; i++) { + if (setjmp(jmpbuf) == 1) + continue; + + for (j = 0; j < file_size; j++) { +read_again: + br_map = tst_atomic_load(&mapcnt); + br_unmap = tst_atomic_load(&unmapcnt); + + c = map_address[j]; + + ar_unmap = tst_atomic_load(&unmapcnt); + ar_map = tst_atomic_load(&mapcnt); + + /* + * Read above is racing against munmap and mmap + * in other thread. While the address might be valid + * the mapping could be in various stages of being + * 'ready'. We only check the value, if we can be sure + * read hapenned in between single mmap and munmap as + * observed by first thread. + */ + if (was_area_mapped(br_map, br_unmap, ar_map, + ar_unmap)) { + switch (c) { + case 'a': + repeated_reads++; + goto read_again; + case 'b': + data_matched++; + break; + default: + tst_res(TFAIL, "value[%d] is %c", j, c); + break; + } + } + } + } + + return NULL; +} + +int mkfile(int size) +{ + int fd, i; + + fd = SAFE_OPEN(TEST_FILENAME, O_RDWR | O_CREAT, 0600); + SAFE_UNLINK(TEST_FILENAME); + + for (i = 0; i < size; i++) + SAFE_WRITE(1, fd, "a", 1); + SAFE_WRITE(1, fd, "\0", 1); + + if (fsync(fd) == -1) + tst_brk(TBROK | TERRNO, "fsync()"); + + return fd; +} + +static void setup(void) +{ + struct sigaction sigptr; + + page_sz = getpagesize(); + + /* + * Used as hint for mmap thread, so it doesn't interfere + * with other potential (temporary) mappings from libc + */ + distant_area = SAFE_MMAP(0, DISTANT_MMAP_SIZE, PROT_WRITE | PROT_READ, + MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + SAFE_MUNMAP(distant_area, (size_t)DISTANT_MMAP_SIZE); + distant_area += DISTANT_MMAP_SIZE / 2; + + if (tst_parse_float(str_exec_time, &exec_time, 0, FLT_MAX)) { + tst_brk(TBROK, "Invalid number for exec_time '%s'", + str_exec_time); + } + + sigptr.sa_sigaction = sig_handler; + sigemptyset(&sigptr.sa_mask); + sigptr.sa_flags = SA_SIGINFO | SA_NODEFER; + SAFE_SIGACTION(SIGSEGV, &sigptr, NULL); + + tst_set_timeout((int)(exec_time * 3600)); +} + +static void run(void) +{ + pthread_t thid[2]; + long chld_args[1]; + int remaining = tst_timeout_remaining(); + int elapsed = 0; + + while (tst_timeout_remaining() > STOP_THRESHOLD) { + int fd = mkfile(file_size); + + tst_atomic_store(0, &mapcnt); + tst_atomic_store(0, &unmapcnt); + + chld_args[0] = fd; + SAFE_PTHREAD_CREATE(&thid[0], NULL, map_write_unmap, chld_args); + SAFE_PTHREAD_CREATE(&thid[1], NULL, read_mem, chld_args); + threads_spawned += 2; + + SAFE_PTHREAD_JOIN(thid[0], NULL); + SAFE_PTHREAD_JOIN(thid[1], NULL); + + close(fd); + + if (remaining - tst_timeout_remaining() > PROGRESS_SEC) { + remaining = tst_timeout_remaining(); + elapsed += PROGRESS_SEC; + tst_res(TINFO, "[%d] mapped: %lu, sigsegv hit: %lu, " + "threads spawned: %lu", elapsed, map_count, + mapped_sigsegv_count, threads_spawned); + tst_res(TINFO, "[%d] repeated_reads: %ld, " + "data_matched: %lu", elapsed, repeated_reads, + data_matched); + } + } + tst_res(TPASS, "System survived."); +} + +static struct tst_test test = { + .test_all = run, + .setup = setup, + .options = options, + .needs_tmpdir = 1, +};