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RE: SIGSEGV in GC_mark_from
- To: "Boehm, Hans" <hans_boehm at hp dot com>
- Subject: RE: SIGSEGV in GC_mark_from
- From: Jeff Sturm <jsturm at one-point dot com>
- Date: Thu, 6 Sep 2001 01:41:15 -0400 (EDT)
- cc: java at gcc dot gnu dot org
On Wed, 5 Sep 2001, Boehm, Hans wrote:
> I assume this is the trunk?
Yes.
> You might check that current_p points to an object which is properly
> described, i.e. has a pointer to a proper vtable.
The first word at current_p points to another heap object. It's not yet
clear to me whether current_p is invalid or it was somehow overwritten.
> Failing that, probably the only real way to debug this is to insert code
> that looks for absurd descriptors at various places, i.e. anything huge with
> the 4 low order bits zero. I would start by inserting such a test around
> line 622.
That helps, thanks.
Jeff