Re: [Sbcl-help] Garbage collection trouble

[Nikodemus S. <nik...@ra...>]

Christopher Laux <chr...@we...> writes:

>> Nikodemus Siivola <nik...@ra...> writes:
>> 
>> How do you tell the objects you are seeing are not part of SBCL itself?
>
> I recognize them (strings) as data generated by my application.

One easy way to make sure specific things get collected, is to use a
counter managed by a finalizer:

 (defvar *counter* 0)

 (defun uncount () (decf *counter*))

 (defun count-object (object)
   (incf *counter*)
   (sb-ext:finalize object #'uncount))

 (count-object (make-symbol "FOO"))
 *counter* => 1
 (gc :full t)
 *counter* => 0

...of course, finalizer may not get called if the conservativism of the 
GC makes the object look like a live object.

Cheers,

  -- Nikodemus              Schemer: "Buddha is small, clean, and serious."
                   Lispnik: "Buddha is big, has hairy armpits, and laughs."