after-gc-hook recently broken for bdwgc 7.2alpha CVS

after-gc-hook recently broken for bdwgc 7.2alpha CVS

[Mark H Weaver]

Sometime between 2.0.0 and current stable-2.0, after-gc-hook has been
broken on my system: "FAIL: gc.test: gc: after-gc-hook gets called".

Both 2.0.0 and current stable-2.0 are built and linked with bdwgc
7.2alpha from CVS, circa 2011-03-27.  This on gNewSense metad/mipsel
(slightly modified Debian Lenny).

Any ideas?

   Best,
    Mark

Re: after-gc-hook recently broken for bdwgc 7.2alpha CVS

[Andy Wingo]

On Sat 09 Apr 2011 07:05, Mark H Weaver <mhw@netris.org> writes:

> Sometime between 2.0.0 and current stable-2.0, after-gc-hook has been
> broken on my system: "FAIL: gc.test: gc: after-gc-hook gets called".
>
> Both 2.0.0 and current stable-2.0 are built and linked with bdwgc
> 7.2alpha from CVS, circa 2011-03-27.  This on gNewSense metad/mipsel
> (slightly modified Debian Lenny).
>
> Any ideas?

In 1.8, this hook was called after GC.  In 2.0, it was only called on
explicit (gc), because the boehm GC doesn't have hooks like this.  But
then in ec7f624d652eaf6e4cf06253101b4a986e1b9e8e I figured out an evil
way to get a hook: simply malloc an object, and resuscitate it in its
finalizer.  The finalizer can then schedule the hook.  If your hook is
not running though, that would indicate a problem.

So, no direct ideas, but good luck :-)

Cheers,

Andy
-- 
http://wingolog.org/

Re: after-gc-hook recently broken for bdwgc 7.2alpha CVS

[Ludovic Courtès]

Hi Mark,

Mark H Weaver <mhw@netris.org> writes:

> Sometime between 2.0.0 and current stable-2.0, after-gc-hook has been
> broken on my system: "FAIL: gc.test: gc: after-gc-hook gets called".

FWIW Hydra has had this problem in the GCC 3.x build job:

  http://hydra.nixos.org/build/1043456

It first had the problem when this change set was introduced:

  http://git.savannah.gnu.org/cgit/guile.git/diff/?id=7f22442b2af85ea9db89c84fbd3acb6a96ee13fd&id2=ad301b6d58c2ca054ebe1fdfaf7357e61311a977

Thanks,
Ludo’.

Re: after-gc-hook recently broken for bdwgc 7.2alpha CVS

[Mark H Weaver]

The "after-gc-hook" test now passes on my system.  Thanks Andy! :)

      Mark


I wrote:
> Sometime between 2.0.0 and current stable-2.0, after-gc-hook has been
> broken on my system: "FAIL: gc.test: gc: after-gc-hook gets called".
>
> Both 2.0.0 and current stable-2.0 are built and linked with bdwgc
> 7.2alpha from CVS, circa 2011-03-27.  This on gNewSense metad/mipsel
> (slightly modified Debian Lenny).