Re: kern/52117: ptrace(2) PTRACE_FORK fails on some platforms

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR kern/52117; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/52117: ptrace(2) PTRACE_FORK fails on some platforms
Date: Tue, 28 Mar 2017 18:10:16 +0200

 Unfortunately it does not work...
 
 kpsignal2() ignores attempts to send signals before we are actually
 running in the new context:
 
         /*
          * If the process is being created by fork, is a zombie or is
          * exiting, then just drop the signal here and bail out.
          */
         if (p->p_stat != SACTIVE && p->p_stat != SSTOP)
                 return 0;
         
 so we can not do the handling earlier, w/o duplicating some of the signal
 handling stuff, which we likely do not want to do.
 
 Anyone got better ideas than copying the x86 code over to all child_return
 implementations?
 
 Martin