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Date: Wed, 17 Jun 2009 19:10:42 +0530
From: naresh kamboju <naresh.kernel@...il.com>
To: linux-arm@...ts.arm.linux.org.uk, linux-kernel@...r.kernel.org
Cc: Oleg Nesterov <oleg@...hat.com>,
Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
Roland McGrath <roland@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Christoph Hellwig <hch@...radead.org>,
Ingo Molnar <mingo@...e.hu>, Pavel Emelyanov <xemul@...nvz.org>
Subject: [ARM-SIGNAL]open_posix_testcase-nanosleep+SIGCONT+SIGSTOP+Failed
Hi,
I want to inform 2.6.29 signal issues of ARM.
this issue is noticed only on ARM.
As per my understanding I have noticed that when there is a delay
(sleep/nanosleep/usleep) in the child process. Child could not
reporting exit status to parent at this situation parent is waiting
for ever by combinations of SIGSTOP and SIGCONT. So test cases are
reporting as HUNG.
Here I have attached open posix test cases which are reported as HUNG
with 2.6.29 kernels.
1. ltp/testcases/open_posix_testsuite/conformance/interfaces/clock_nanosleep/1-5.c
2. ltp/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-2.c
ARCH: ARM
KERNEL: 2.6.29.1-alp_nl-kzm-arm11
Glibc: 2.9
Gcc: 4.3.3
/*****************************************************************/
open_posix_testsuite/conformance/interfaces/clock_nanosleep/1-5.c
/*****************************************************************/
/*
* Copyright (c) 2002-3, Intel Corporation. All rights reserved.
* Created by: julie.n.fleischer REMOVE-THIS AT intel DOT com
* This file is licensed under the GPL license. For the full content
* of this license, see the COPYING file at the top level of this
* source tree.
* Test that clock_nanosleep() does not stop if a signal is received
* that has no signal handler. clock_nanosleep() should still respond
* to the signal, but should resume after a SIGCONT signal is received.
*
* SIGSTOP will be used to stop the sleep.
*/
#include <stdio.h>
#include <time.h>
#include <signal.h>
#include <unistd.h>
#include <sys/wait.h>
#include <stdlib.h>
#include "posixtest.h"
#define SLEEPSEC 5
#define CHILDPASS 1
#define CHILDFAIL 0
int main(int argc, char *argv[])
{
int pid, slepts;
struct timespec tsbefore, tsafter;
if (clock_gettime(CLOCK_REALTIME, &tsbefore) != 0) {
perror("clock_gettime() did not return success\n");
return PTS_UNRESOLVED;
}
if ((pid = fork()) == 0) {
/* child here */
struct timespec tssleep;
tssleep.tv_sec=SLEEPSEC;
tssleep.tv_nsec=0;
if (clock_nanosleep(CLOCK_REALTIME, 0, &tssleep, NULL) == 0) {
printf("clock_nanosleep() returned success\n");
return CHILDPASS;
} else {
printf("clock_nanosleep() did not return success\n");
return CHILDFAIL;
}
return CHILDFAIL;
} else {
/* parent here */
int i;
sleep(1);
if (kill(pid, SIGSTOP) != 0) {
printf("Could not raise SIGSTOP\n");
return PTS_UNRESOLVED;
}
if (kill(pid, SIGCONT) != 0) {
printf("Could not raise SIGCONT\n");
return PTS_UNRESOLVED;
}
if (wait(&i) == -1) {
perror("Error waiting for child to exit\n");
return PTS_UNRESOLVED;
}
if (!WIFEXITED(i) || !WEXITSTATUS(i)) {
printf("Test FAILED\n");
return PTS_FAIL;
}
if (clock_gettime(CLOCK_REALTIME, &tsafter) == -1) {
perror("Error in clock_gettime()\n");
return PTS_UNRESOLVED;
}
slepts=tsafter.tv_sec-tsbefore.tv_sec;
#ifdef DEBUG
printf("Start %d sec; End %d sec\n", (int) tsbefore.tv_sec,
(int) tsafter.tv_sec);
#endif
if (slepts >= SLEEPSEC) {
printf("Test PASSED\n");
return PTS_PASS;
} else {
printf("clock_nanosleep() did not sleep long enough\n");
return PTS_FAIL;
}
} //end fork
return PTS_UNRESOLVED;
}
/*****************************************************************/
open_posix_testsuite/conformance/interfaces/nanosleep/3-2.c
/*****************************************************************/
/*
* Copyright (c) 2002, Intel Corporation. All rights reserved.
* Created by: julie.n.fleischer REMOVE-THIS AT intel DOT com
* This file is licensed under the GPL license. For the full content
* of this license, see the COPYING file at the top level of this
* source tree.
*
* Regression test motivated by an LKML discussion. Test that nanosleep()
* can be interrupted and then continue.
*/
#include <stdio.h>
#include <time.h>
#include <signal.h>
#include <unistd.h>
#include <sys/wait.h>
#include <stdlib.h>
#define PTS_PASS 0
#define PTS_FAIL 1
#define PTS_UNRESOLVED 2
#define PTS_UNSUPPORTED 4
#define PTS_UNTESTED 5
#define SLEEPSEC 5
#define CHILDPASS 0 //if interrupted, child will return 0
#define CHILDFAIL 1
int main(int argc, char *argv[])
{
int pid, slepts;
struct timespec tsbefore, tsafter;
if (clock_gettime(CLOCK_REALTIME, &tsbefore) != 0) {
perror("clock_gettime() did not return success\n");
return PTS_UNRESOLVED;
}
if ((pid = fork()) == 0) {
/* child here */
struct timespec tssleep;
tssleep.tv_sec=SLEEPSEC;
tssleep.tv_nsec=0;
if (nanosleep(&tssleep, NULL) == 0) {
printf("nanosleep() returned success\n");
return CHILDPASS;
} else {
printf("nanosleep() did not return success\n");
return CHILDFAIL;
}
return CHILDFAIL;
} else {
/* parent here */
int i;
sleep(1);
if (kill(pid, SIGSTOP) != 0) {
printf("Could not raise SIGSTOP\n");
return PTS_UNRESOLVED;
}
if (kill(pid, SIGCONT) != 0) {
printf("Could not raise SIGCONT\n");
return PTS_UNRESOLVED;
}
if (wait(&i) == -1) {
perror("Error waiting for child to exit\n");
return PTS_UNRESOLVED;
}
if (!WIFEXITED(i)) {
printf("nanosleep() did not return 0\n");
return PTS_FAIL;
}
if (clock_gettime(CLOCK_REALTIME, &tsafter) == -1) {
perror("Error in clock_gettime()\n");
return PTS_UNRESOLVED;
}
slepts=tsafter.tv_sec-tsbefore.tv_sec;
printf("Start %d sec; End %d sec\n", (int) tsbefore.tv_sec,
(int) tsafter.tv_sec);
if (slepts >= SLEEPSEC) {
printf("Test PASSED\n");
return PTS_PASS;
} else {
printf("nanosleep() did not sleep long enough\n");
return PTS_FAIL;
}
} //end fork
return PTS_UNRESOLVED;
}
/*****************************************************************/
Best regards,
Naresh Kamboju
View attachment "proc_log.txt" of type "text/plain" (1618 bytes)
Download attachment "3-2.c" of type "application/octet-stream" (2344 bytes)
Download attachment "1-5.c" of type "application/octet-stream" (2405 bytes)
Download attachment "nano_sleep_3-2.log" of type "application/octet-stream" (4502 bytes)
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