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Date:      Wed, 16 Jan 2002 09:55:00 -0800 (PST)
From:      Torbjorn Granlund <tege@swox.se>
To:        freebsd-gnats-submit@FreeBSD.org
Subject:   kern/33952: Bogus error message from correct phreads code
Message-ID:  <200201161755.g0GHt0e87109@freefall.freebsd.org>
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>Number:         33952
>Category:       kern
>Synopsis:       Bogus error message from correct phreads code
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jan 16 10:00:08 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Torbjorn Granlund
>Release:        4.4 (and 4.2, 4.3, but not fbsd 4.1)
>Organization:
Swox AB
>Environment:
FreeBSD hill.swox.se 4.4-RELEASE FreeBSD 4.4-RELEASE #0: Tue Sep 18 11:57:08 PDT 2001     murray@builder.FreeBSD.org:/usr/src/sys/compile/GENERIC  i386

>Description:
This test case makes the pthreads code print a bogus error message:

Fatal error 'Thread 0x804c400 has called pthread_exit() from a destructor. POSIX 1003.1 1996 s16.2.5.2 does not allow this!' at line ? in file /usr/src/lib/libc_r/uthread/uthread_exit.c (errno = ?)

>How-To-Repeat:
Compile and run the program below.

#include <pthread.h>
#include <unistd.h>

int stop_flag = 0;

void *
crunch(void *ignored)
{
  pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, 0);
  pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, 0);

  while (!stop_flag)
    ;
  pthread_exit (0);
}

int
main()
{
  pthread_t thread;

  pthread_create(&thread, NULL, crunch, 0);
  sleep(1);
  pthread_cancel(thread);
  stop_flag = 1;
  sleep(1);
  return 0;
}

>Fix:
None.  We have to tell our customer to run the program on any Unix
system except FreeBSD until this (and the other pthreads bug we've
also reported) are fixed.

>Release-Note:
>Audit-Trail:
>Unformatted:

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