NetBSD Problem Report #54377

From gson@gson.org  Tue Jul 16 07:34:05 2019
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Date: Tue, 16 Jul 2019 10:34:00 +0300 (EEST)
From: gson@gson.org (Andreas Gustafsson)
Reply-To: gson@gson.org (Andreas Gustafsson)
To: gnats-bugs@NetBSD.org
Subject: lib/libc/sys/t_ptrace_wait4/resume1 test case fails randomly
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>Number:         54377
>Category:       kern
>Synopsis:       lib/libc/sys/t_ptrace_wait4/resume1 test case fails randomly
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 16 07:35:00 +0000 2019
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date 2019.07.13.09.47.14
>Organization:

>Environment:
System: NetBSD
Architecture: x86_64
Machine: amd64
>Description:

The resume1 test case of the lib/libc/sys/t_ptrace_wait4 test program
fails randomly, even on real hardware.

>How-To-Repeat:

  cd /usr/tests/lib/libc/sys
  while ./t_ptrace_wait4 resume1 >/tmp/stdout 2>/tmp/stderr; do echo -n .; done

On my system, this either hangs or exits with a nonzero exit status within
a few seconds.

>Fix:

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