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BDW doesn't have mutator-local freelists for pointerless objects

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This commit is contained in:
Andy Wingo 2022-03-29 14:51:20 +02:00
parent e837d51f53
commit ac57e01e31
1 changed files with 5 additions and 8 deletions
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11
bdw.h
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@ -34,7 +34,6 @@ struct heap {
struct mutator { struct mutator {
void *freelists[GC_INLINE_FREELIST_COUNT]; void *freelists[GC_INLINE_FREELIST_COUNT];
void *pointerless_freelists[GC_INLINE_FREELIST_COUNT];
struct heap *heap; struct heap *heap;
}; };
@ -94,13 +93,10 @@ static inline void* allocate(struct mutator *mut, enum alloc_kind kind,
static inline void* allocate_pointerless(struct mutator *mut, static inline void* allocate_pointerless(struct mutator *mut,
enum alloc_kind kind, size_t size) { enum alloc_kind kind, size_t size) {
size_t idx = gc_inline_bytes_to_freelist_index(size); // Because the BDW API requires us to implement a custom marker so
// that the pointerless freelist gets traced, even though it's in a
if (UNLIKELY (idx >= GC_INLINE_FREELIST_COUNT)) // pointerless region, we punt on thread-local pointerless freelists.
return GC_malloc_atomic(size); return GC_malloc_atomic(size);
return allocate_small(&mut->pointerless_freelists[idx], idx,
GC_INLINE_KIND_POINTERLESS);
} }
static inline void collect(struct mutator *mut) { static inline void collect(struct mutator *mut) {
@ -138,6 +134,7 @@ static int initialize_gc(size_t heap_size, struct heap **heap,
GC_set_max_heap_size (heap_size); GC_set_max_heap_size (heap_size);
GC_expand_hp(heap_size - current_heap_size); GC_expand_hp(heap_size - current_heap_size);
} }
GC_allow_register_threads();
*heap = GC_malloc(sizeof(struct heap)); *heap = GC_malloc(sizeof(struct heap));
pthread_mutex_init(&(*heap)->lock, NULL); pthread_mutex_init(&(*heap)->lock, NULL);
*mutator = add_mutator(*heap); *mutator = add_mutator(*heap);