GNU bug report logs - #9900
Using a guardian on a value in a weak hash

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Package: guile;

Reported by: Ian Price <ianprice90 <at> googlemail.com>

Date: Fri, 28 Oct 2011 20:47:02 UTC

Severity: normal

Done: Andy Wingo <wingo <at> pobox.com>

Bug is archived. No further changes may be made.

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Message #20 received at submit <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: bug-guile <at> gnu.org
Subject: Re: bug#9900: local vars not cleaned
Date: Tue, 01 Nov 2011 01:20:34 +0100

Hi Stefan,

Stefan Israelsson Tampe <stefan.itampe <at> gmail.com> skribis:

> A program is executed and a set of locals is allocated on the stack for the
> duration of the loading, this means that during the
> whole execution of the loaded file the locals variables are below the stack
> pointer and hence always contains a reference from the stack to the last
> used objects in the local variables.

Normally the GC will only scan the relevant part of the VM stack–see
‘VM_ENABLE_PRECISE_STACK_GC_SCAN’ in vm.c.  If you think this is not
working as advertised, can you add a breakpoint in ‘vm_stack_mark’ and
see what happens?

To check your hypothesis you could also define ‘VM_ENABLE_STACK_NULLING’
in vm.c.

TIA! :-)

Ludo’.
This bug report was last modified 13 years and 156 days ago.

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