Hi,
[EMAIL PROTECTED] (Ludovic Courtès) writes:
> $ guile
> guile> (gc-live-object-stats)
> Segmentation fault (core dumped)
The patch below fixes this problem. Basically, what happens when doing
this is that `scm_i_card_statistics ()' gets called on yet uninitialized
cards. This is normal because cards are initialized lazily at sweep
time by `scm_i_sweep_some_cards ()' which calls
`scm_i_init_card_freelist ()' if needed.
BTW, looking at the code of `scm_i_sweep_some_cards ()', it looks like
cards can be initialized more than once in the event where THRESHOLD is
reached before NEXT_FREE reached the upper boundary of SEG. In such a
case, SEG->FIRST_TIME will remain equal to 1, and thus, the next time
this function is called on SEG, `scm_i_init_card_freelist ()' will be
called again for each of SEG's cards.
Did I miss something?
Thanks,
Ludovic.
2005-11-17 Ludovic Courtès <[EMAIL PROTECTED]>
* gc-card.c (scm_i_card_statistics): Return if BITVEC is NULL.
This was typically hit when running `gc-live-object-stats' right
after starting Guile.
--- orig/libguile/gc-card.c
+++ mod/libguile/gc-card.c
@@ -306,6 +306,10 @@
int span = seg->span;
int offset = SCM_MAX (SCM_GC_CARD_N_HEADER_CELLS, span);
+ if (!bitvec)
+ /* Card P hasn't been initialized yet by `scm_i_init_card_freelist ()'. */
+ return;
+
for (p += offset; p < end; p += span, offset += span)
{
scm_t_bits tag = -1;
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