Re: bin/52932: tests hang on netbsd-8

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR bin/52932; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
	Manuel.Bouyer%lip6.fr@localhost
Cc: 
Subject: Re: bin/52932: tests hang on netbsd-8
Date: Wed, 17 Jan 2018 13:52:11 -0500

 On Jan 17,  6:50pm, gson%gson.org@localhost (Andreas Gustafsson) wrote:
 -- Subject: Re: bin/52932: tests hang on netbsd-8
 
 | The following reply was made to PR bin/52932; it has been noted by GNATS.
 | 
 | From: Andreas Gustafsson <gson%gson.org@localhost>
 | To: Manuel.Bouyer%lip6.fr@localhost, gnats-bugs%NetBSD.org@localhost
 | Cc: 
 | Subject: Re: bin/52932: tests hang on netbsd-8
 | Date: Wed, 17 Jan 2018 20:49:15 +0200
 | 
 |  This problem first appeared in -current with src/sys/kern/kern_lwp.c 1.191,
 |  which was then pulled up: http://releng.netbsd.org/cgi-bin/req-8.cgi?show=417
 |  
 |  The problem was worked around in -current by disabling the hanging
 |  test in src/tests/lib/libc/sys/t_ptrace_wait.c 1.11, but apparently
 |  this change has not been pulled up.
 |  
 |  Has anyone actually conclusively determined whether the kern_lwp.c
 |  commit or the test is at fault?
 
 Well, there conclusion I've reached is that there are more races in
 ptrace(2) that are exposed by the kern_lwp.c change. Reverting the change
 makes regular (non-ptraced) binaries hang randomly, such as go. Choose
 your poison... Would you rather have the ptrace test hang, or a regular
 program?
 
 christos