[812] in Pthreads mailing list archive
Strange behaviour
daemon@ATHENA.MIT.EDU (Wolfgang =?iso-8859-1?Q?R=F6mer?=)
Thu Mar 11 11:06:59 1999
Date: Thu, 11 Mar 1999 16:47:04 +0100
From: Wolfgang =?iso-8859-1?Q?R=F6mer?= <Wolfgang.Roemer@brokat.com>
To: pthreads@MIT.EDU
Hi,
some strange behaviour occured to me concerning the following code:
-----------------cut here--------------------------------
#include <sys/types.h>
/********************************************************************************
* This program (named test1) forces an error when compiled and linked
as follows:
*
* gcc -o test1 test1.c -lpthreads
*
* I know it seems strange to link this program with the pthreads
library because
* it does not use pthreads, but this test program is only a part of a
much larger
* program that uses pthreads and I could not get it to work on Linux
(It works great
* on solaris, aix and hpux). In 2 days of work I could reduce the
problem to this
* dummy program. Linking without the pthreads makes the program run
fine.
*
* Sympthoms:
* CPU load is 100% and the child never stops
*
* Environment:
* SuSE Linux 5.3, Kernel 2.0.36, gcc-2.7.2.1, libc5.4.33,
libpthreads1.60.4
*
* (The problems appears with Kernel 2.0.35 as well.)
********************************************************************************/
int main()
{
pid_t pid = fork();
if( pid < 0 )
{
perror( "test" );
exit(1);
}
else if( pid > 0 )
{
/* this is the parent */
waitpid( pid, NULL, 0 );
exit(0);
};
/* this is the child */
sleep(10);
exit(0);
}
-------------------cut here-------------------------------
Any ideas
Wolfgang
