hints on debugging memory corruption...

[Joern Rennecke]

Quoting Tom Tromey <tromey@redhat.com>:

>>>>>> "Basile" == Basile Starynkevitch <basile@starynkevitch.net> writes:
>
> Basile> So I need to understand who is writing the 0x101 in that field.


> One thing to watch out for is that the memory can be recycled.  I've
> been very confused whenever I've forgotten this.  I have a hack for the
> GC (appended -- ancient enough that it probably won't apply) that makes
> it easy to notice when an object you are interested in is collected.
> IIRC I apply this before the first run, call ggc_watch_object for the
> thing I am interested in, and then see in what GC cycle the real one is
> allocated.

If what you are looking for survives such a change, postponing garbage
collection so it won't happen till the crash can make things simpler.