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move slab allocator state into main state region

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This commit is contained in:
Daniel Micay 2018-10-15 14:46:57 -04:00
parent e8eca2d430
commit 1e5dec97e0
1 changed files with 12 additions and 7 deletions
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19
malloc.c
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@ -556,6 +556,11 @@ struct region_allocator {
struct random_state rng; struct random_state rng;
}; };
struct allocator_state {
struct size_class size_class_metadata[N_SIZE_CLASSES];
struct region_allocator region_allocator;
};
static void regions_quarantine_deallocate_pages(void *p, size_t size, size_t guard_size) { static void regions_quarantine_deallocate_pages(void *p, size_t size, size_t guard_size) {
if (size >= REGION_QUARANTINE_SKIP_THRESHOLD) { if (size >= REGION_QUARANTINE_SKIP_THRESHOLD) {
deallocate_pages(p, size, guard_size); deallocate_pages(p, size, guard_size);
@ -762,10 +767,13 @@ COLD static void init_slow_path(void) {
size_t metadata_guard_size = size_t metadata_guard_size =
(get_random_u64_uniform(rng, REAL_CLASS_REGION_SIZE / PAGE_SIZE) + 1) * PAGE_SIZE; (get_random_u64_uniform(rng, REAL_CLASS_REGION_SIZE / PAGE_SIZE) + 1) * PAGE_SIZE;
ro.region_allocator = allocate_pages(sizeof(struct region_allocator), metadata_guard_size, true); struct allocator_state *allocator_state =
if (ro.region_allocator == NULL) { allocate_pages(sizeof(struct allocator_state), metadata_guard_size, true);
fatal_error("failed to allocate region allocator state"); if (allocator_state == NULL) {
fatal_error("failed to reserve allocator state");
} }
ro.region_allocator = &allocator_state->region_allocator;
struct region_allocator *ra = ro.region_allocator; struct region_allocator *ra = ro.region_allocator;
mutex_init(&ra->lock); mutex_init(&ra->lock);
@ -788,10 +796,7 @@ COLD static void init_slow_path(void) {
} }
ro.slab_region_end = (char *)ro.slab_region_start + slab_region_size; ro.slab_region_end = (char *)ro.slab_region_start + slab_region_size;
ro.size_class_metadata = allocate_pages(sizeof(struct size_class) * N_SIZE_CLASSES, PAGE_SIZE, true); ro.size_class_metadata = allocator_state->size_class_metadata;
if (ro.size_class_metadata == NULL) {
fatal_error("failed to allocate slab allocator state");
}
for (unsigned class = 0; class < N_SIZE_CLASSES; class++) { for (unsigned class = 0; class < N_SIZE_CLASSES; class++) {
struct size_class *c = &ro.size_class_metadata[class]; struct size_class *c = &ro.size_class_metadata[class];