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hardened_malloc
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randomize slot selection for empty slabs too

pull/50/head
Daniel Micay 2018-08-25 18:02:13 -04:00
parent c335c43dd7
commit 173dd6e7a5
1 changed files with 9 additions and 4 deletions
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13
malloc.c
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@ -330,9 +330,12 @@ static void *slab_allocate(size_t requested_size) {
c->partial_slabs = metadata;
void *slab = get_slab(c, slab_size, metadata);
set_slot(metadata, 0);
size_t slot = get_free_slot(&c->rng, slots, metadata);
set_slot(metadata, slot);
void *p = slot_pointer(size, slab, slot);
pthread_mutex_unlock(&c->mutex);
return slab;
return p;
}
struct slab_metadata *metadata = alloc_metadata(c, slab_size);
@ -349,10 +352,12 @@ static void *slab_allocate(size_t requested_size) {
}
c->partial_slabs = metadata;
set_slot(metadata, 0);
size_t slot = get_free_slot(&c->rng, slots, metadata);
set_slot(metadata, slot);
void *p = slot_pointer(size, slab, slot);
pthread_mutex_unlock(&c->mutex);
return slab;
return p;
}
struct slab_metadata *metadata = c->partial_slabs;