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Added poisoning of free'd objects when we're debugging.

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This commit is contained in:
Martin Mares 2000-05-16 13:51:31 +00:00
parent df9f0fb30a
commit b8e60d3562
1 changed files with 7 additions and 0 deletions
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7
lib/slab.c
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@ -16,6 +16,10 @@
#undef FAKE_SLAB /* Turn on if you want to debug memory allocations */ #undef FAKE_SLAB /* Turn on if you want to debug memory allocations */
#ifdef DEBUGGING
#define POISON /* Poison all regions after they are freed */
#endif
static void slab_free(resource *r); static void slab_free(resource *r);
static void slab_dump(resource *r); static void slab_dump(resource *r);
static resource *slab_lookup(resource *r, unsigned long addr); static resource *slab_lookup(resource *r, unsigned long addr);
@ -221,6 +225,9 @@ sl_free(slab *s, void *oo)
struct sl_obj *o = SKIP_BACK(struct sl_obj, u.data, oo); struct sl_obj *o = SKIP_BACK(struct sl_obj, u.data, oo);
struct sl_head *h = o->slab; struct sl_head *h = o->slab;
#ifdef POISON
memset(oo, 0xdb, s->obj_size);
#endif
o->u.next = h->first_free; o->u.next = h->first_free;
h->first_free = o; h->first_free = o;
if (!--h->num_full) if (!--h->num_full)