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Re: SIGILL problems with Hurd port of GO in gcc-8, and rpctrace bugs.


From: Brent W. Baccala
Subject: Re: SIGILL problems with Hurd port of GO in gcc-8, and rpctrace bugs.
Date: Thu, 16 Nov 2017 12:25:23 -0500

On Wed, Nov 15, 2017 at 11:53 AM, Svante Signell <address@hidden> wrote:

Additionally the rpctrace output hangs hard at gsync_wait() both for the
./index0-out-reduced_OK.x and ./index0-out-reduced_nOK.x files.
Has rpctrace been thoroughly tested on multi-thread applications?

Please, give feedback on this if you have possibility, specifically the rpctrace
bug(s).


rpctrace has a known problem interacting with system RPCs that block the sender.

See the discussion thread starting here:

    http://lists.gnu.org/archive/html/bug-hurd/2016-09/msg00002.html

My guess is that you're seeing the same problem with gsync_wait() that I saw with vm_map().  I've got patches to rpctrace to fix this problem, here:

    https://github.com/BrentBaccala/hurd

For those of you who've seen this before, note that I've renamed the github repository.

This isn't in the main Hurd repository because I wouldn't sign the FSF copyright assignment.  They insisted on a clause that said I assign copyright on "all past and future works of Developer that constitute changes and enhancements to the Program" and I wouldn't agree to it, because I was only willing to assign copyright on specific changes.

So, I've started keeping my own repository.  I just double-checked those patches, and they apply cleanly again the current Savannah repository (just warnings about offset and fuzz).

Perhaps you could try those patches and see if they fix your problem?  If not, then it's something else that should be investigated further.

    agape
    brent

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