jmb
/
hardened_malloc
mirror of https://github.com/GrapheneOS/hardened_malloc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
malloc.c
View File

@ -330,9 +330,12 @@ static void *slab_allocate(size_t requested_size) {
c->partial_slabs = metadata; c->partial_slabs = metadata;
void *slab = get_slab(c, slab_size, 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); pthread_mutex_unlock(&c->mutex);
return slab; return p;
} }
struct slab_metadata *metadata = alloc_metadata(c, slab_size); 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; 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); pthread_mutex_unlock(&c->mutex);
return slab; return p;
} }
struct slab_metadata *metadata = c->partial_slabs; struct slab_metadata *metadata = c->partial_slabs;