Commit a3bef655 authored by Elvira Khabirova's avatar Elvira Khabirova Committed by Dmitry V. Levin

tests: check delay injection

* tests/delay.c: New file.
* tests/delay.test: New test.
* tests/.gitignore: Add delay.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(delay_LDADD): New variable.
(MISC_TESTS): Add delay.test.
Co-Authored-by: default avatarDmitry V. Levin <[email protected]>
parent ba8e768a
......@@ -39,6 +39,7 @@ clone_ptrace
copy_file_range
count-f
creat
delay
delete_module
dev-yy
dup
......
......@@ -97,6 +97,7 @@ check_PROGRAMS = $(PURE_EXECUTABLES) \
clone_parent \
clone_ptrace \
count-f \
delay \
execve-v \
execveat-v \
filter-unavailable \
......@@ -166,6 +167,7 @@ check_PROGRAMS = $(PURE_EXECUTABLES) \
attach_f_p_LDADD = -lpthread $(LDADD)
count_f_LDADD = -lpthread $(LDADD)
delay_LDADD = $(clock_LIBS) $(LDADD)
filter_unavailable_LDADD = -lpthread $(LDADD)
fstat64_CPPFLAGS = $(AM_CPPFLAGS) -D_FILE_OFFSET_BITS=64
fstatat64_CPPFLAGS = $(AM_CPPFLAGS) -D_FILE_OFFSET_BITS=64
......@@ -271,6 +273,7 @@ MISC_TESTS = \
clone_ptrace.test \
count-f.test \
count.test \
delay.test \
detach-running.test \
detach-sleeping.test \
detach-stopped.test \
......
/*
* Check delay injection.
*
* Copyright (c) 2018 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <asm/unistd.h>
static int64_t
usecs_from_tv(const struct timeval *const tv)
{
return (int64_t) tv->tv_sec * 1000000 + tv->tv_usec;
}
static int64_t
usecs_from_ts(const struct timespec *const ts)
{
return (int64_t) ts->tv_sec * 1000000 + ts->tv_nsec / 1000;
}
static void
check_delay(const struct timeval *const tv0,
const struct timespec *const ts,
const struct timeval *const tv1,
const int nproc,
const int64_t delay_enter,
const int64_t delay_exit)
{
const int64_t us0 = usecs_from_tv(tv0);
const int64_t us = usecs_from_ts(ts);
const int64_t us1 = usecs_from_tv(tv1);
if (us - us0 < delay_exit * (nproc - 1) / nproc)
_exit(1);
if (us - us0 > delay_exit * (nproc + 1) / nproc)
_exit(2);
if (us1 - us < delay_enter * (nproc - 1) / nproc)
_exit(3);
if (us1 - us > delay_enter * (nproc + 1) / nproc)
_exit(4);
}
static void
run(const int nproc, const int delay_enter, const int delay_exit)
{
struct timeval prev = { 0, 0 }, now;
for (int i = 0; i < nproc; ++i, prev = now) {
struct timespec ts;
if (i && clock_gettime(CLOCK_REALTIME, &ts))
perror_msg_and_fail("clock_gettime");
if (syscall(__NR_gettimeofday, &now, NULL))
perror_msg_and_fail("gettimeofday");
if (!i)
continue;
check_delay(&prev, &ts, &now, nproc, delay_enter, delay_exit);
}
_exit(0);
}
int
main(int ac, char *av[])
{
if (ac != 4)
error_msg_and_fail("usage: delay <nproc> <delay_enter> <delay_exit>");
const int nproc = atoi(av[1]);
if (nproc <= 1)
perror_msg_and_fail("invalid nproc: %s", av[1]);
const int delay_enter = atoi(av[2]);
if (delay_enter <= 0)
perror_msg_and_fail("invalid delay_enter: %s", av[2]);
const int delay_exit = atoi(av[3]);
if (delay_exit <= 0)
perror_msg_and_fail("invalid delay_exit: %s", av[3]);
for (int i = 0; i < nproc; ++i) {
pid_t pid = fork();
if (pid)
usleep(MAX(delay_enter, delay_exit) / nproc);
else
run(nproc, delay_enter, delay_exit);
}
int status;
while (wait(&status) > 0) {
if (status)
perror_msg_and_fail("wait status %d", status);
}
return 0;
}
#!/bin/sh
# Check delay injection.
. "${srcdir=.}/init.sh"
delay_enter=800000
delay_exit=1600000
run_strace -f -r -egettimeofday \
-einject=gettimeofday:delay_enter=$delay_enter:delay_exit=$delay_exit \
../delay 4 $delay_enter $delay_exit
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