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List: glibc-bug
Subject: sem_trywait on initial zeroed semaphore core dumps
From: "Iseri, Jerry" <Jerry.Iseri () SpirentCom ! COM>
Date: 2002-11-28 0:16:58
[Download RAW message or body]
-----Original Message-----
From: Jerry.Iseri@talos4.Adtech-Inc.COM
[mailto:Jerry.Iseri@talos4.Adtech-Inc.COM]
Sent: Wednesday, November 20, 2002 3:39 PM
To: glibc-bug-reports-stable@gnu.org
Cc: Jerry.Iseri@SpirentCOM.com
Subject: sem_trywait on initial zeroed semaphore core dumps
>Submitter-Id: net
>Originator:
>Organization:
>Confidential: no
>Synopsis: sem_trywait on zeroed semaphore core dumps
>Severity: serious
>Priority: medium
>Category: libc
>Class: sw-bug
>Release: libc-2.2.4
>Environment:
Host type: i386-redhat-linux-gnu
System: Linux talos4 2.4.2-2 #1 Sun Apr 8 20:41:30 EDT 2001 i686 unknown
Architecture: i686
Addons: c_stubs glibc-compat linuxthreads
Build CFLAGS: -march=i386 -D__USE_STRING_INLINES -fstrict-aliasing
-freorder-blocks -DNDEBUG=1 -g -O3
Build CC: gcc
Compiler version: 2.96 20000731 (Red Hat Linux 7.2 2.96-108.1)
Kernel headers: 2.4.2-2
Symbol versioning: yes
Build static: yes
Build shared: yes
Build pic-default: no
Build profile: yes
Build omitfp: no
Build bounded: no
Build static-nss: no
Stdio: libio
>Description:
compile the following code using
g++ -DLinux -D_REENTRANT -o semaphore1 semaphore1.c -lrt -lpthread
This works on the following release (Red Hat Linux release 6.1 (Cartman)
Release: libc-2.1.2
Environment:
<machine, os, target, libraries (multiple lines)>
Host type: i386-redhat-linux-gnu
System: Linux swrhat4 2.2.12-20 #1 Mon Sep 27 10:40:35 EDT 1999 i686 unknown
Architecture: i686
Addons: crypt glibc-compat linuxthreads
Build CFLAGS: -O3 -Wall -Winline -Wstrict-prototypes -Wwrite-strings -g
Build CC: egcs
Compiler version: egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)
Kernel headers: 2.2.12-20
Symbol versioning: yes
Build static: yes
Build shared: yes
Build pic-default: no
Build profile: yes
Build omitfp: no
Build bounded: no
Build static-nss: no
Stdio: libio
>How-To-Repeat:
/*
* File: semaphore1.c
*
*
*
--------------------------------------------------------------------------
*
*
--------------------------------------------------------------------------
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999,2002 Pthreads-win32 contributors
*
* Contact Email: rpj@ise.canberra.edu.au
*
* The current list of contributors is contained
* in the file CONTRIBUTORS included with the source
* code distribution. The list can also be seen at the
* following World Wide Web location:
* http://sources.redhat.com/pthreads-win32/contributors.html
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library in the file COPYING.LIB;
* if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
*
--------------------------------------------------------------------------
*
* Test Synopsis: Verify trywait() returns -1 and sets EAGAIN.
* -
*
* Test Method (Validation or Falsification):
* - Validation
*
* Requirements Tested:
* -
*
* Features Tested:
* -
*
* Cases Tested:
* -
*
* Description:
* -
*
* Environment:
* -
*
* Input:
* - None.
*
* Output:
* - File name, Line number, and failed expression on failure.
* - No output on success.
*
* Assumptions:
* -
*
* Pass Criteria:
* - Process returns zero exit status.
*
* Fail Criteria:
* - Process returns non-zero exit status.
*/
#include <unistd.h>
#if defined(SunOS)
#include <thread.h>
#endif
#include <pthread.h>
#include <sched.h>
#include <semaphore.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
void *
thr(void * arg)
{
sem_t s;
int result;
assert(sem_init(&s, PTHREAD_PROCESS_PRIVATE, 0) == 0);
assert((result = sem_trywait(&s)) == -1);
if ( result == -1 )
{
perror("thread: sem_trywait 1"); // No error
#if defined(LINUX)
/*Is this a linux threads bug */
printf("Linux errno = %d instead of Solaris/Win32 %d\n",errno,EAGAIN);
//assert(errno == ESPIPE);
/* works on RH Linux 6.1 */
assert(errno == EAGAIN);
#else
assert(errno == EAGAIN);
#endif
}
else
{
printf("thread: ok 1\n");
}
assert((result = sem_post(&s)) == 0);
assert((result = sem_trywait(&s)) == 0);
if ( result == -1 )
{
perror("thread: sem_trywait 2");
}
else
{
printf("thread: ok 2\n");
}
assert(sem_post(&s) == 0);
return 0;
}
int
main()
{
pthread_t t;
sem_t s;
int result;
assert(pthread_create(&t, NULL, thr, NULL) == 0);
assert(pthread_join(t, (void **)&result) == 0);
assert(result == 0);
assert(sem_init(&s, PTHREAD_PROCESS_PRIVATE, 0) == 0);
assert((result = sem_trywait(&s)) == -1);
if ( result == -1 )
{
perror("main: sem_trywait 1"); // No error
#if defined(LINUX)
/* a linux threads bug ??/ */
printf("Linux errno = %d instead of Solaris/Win32 %d\n",errno,EAGAIN);
//assert(errno == ESPIPE);
/* works on RH Linux 6.1 */
assert(errno == EAGAIN);
#else
assert(errno == EAGAIN);
#endif
}
else
{
printf("main: ok 1\n");
}
assert((result = sem_post(&s)) == 0);
assert((result = sem_trywait(&s)) == 0);
if ( result == -1 )
{
perror("main: sem_trywait 2");
}
else
{
printf("main: ok 2\n");
}
assert(sem_post(&s) == 0);
return 0;
}
>Fix:
unknown
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