def malloc_fixedsize_clear(self, typeid, size, has_finalizer=False, is_finalizer_light=False, contains_weakptr=False): if (has_finalizer or (raw_malloc_usage(size) > self.lb_young_fixedsize and raw_malloc_usage(size) > self.largest_young_fixedsize)): # ^^^ we do two size comparisons; the first one appears redundant, # but it can be constant-folded if 'size' is a constant; then # it almost always folds down to False, which kills the # second comparison as well. ll_assert(not contains_weakptr, "wrong case for mallocing weakref") # "non-simple" case or object too big: don't use the nursery return SemiSpaceGC.malloc_fixedsize_clear(self, typeid, size, has_finalizer, is_finalizer_light, contains_weakptr) size_gc_header = self.gcheaderbuilder.size_gc_header totalsize = size_gc_header + size result = self.nursery_free if raw_malloc_usage(totalsize) > self.nursery_top - result: result = self.collect_nursery() llarena.arena_reserve(result, totalsize) # GCFLAG_NO_YOUNG_PTRS is never set on young objs self.init_gc_object(result, typeid, flags=0) self.nursery_free = result + totalsize if contains_weakptr: self.young_objects_with_weakrefs.append(result + size_gc_header) return llmemory.cast_adr_to_ptr(result + size_gc_header, llmemory.GCREF)
def malloc_fixedsize_clear(self, typeid, size, can_collect, has_finalizer=False, contains_weakptr=False): if (has_finalizer or not can_collect or (raw_malloc_usage(size) > self.lb_young_var_basesize and raw_malloc_usage(size) > self.largest_young_fixedsize)): # ^^^ we do two size comparisons; the first one appears redundant, # but it can be constant-folded if 'size' is a constant; then # it almost always folds down to False, which kills the # second comparison as well. ll_assert(not contains_weakptr, "wrong case for mallocing weakref") # "non-simple" case or object too big: don't use the nursery return SemiSpaceGC.malloc_fixedsize_clear(self, typeid, size, can_collect, has_finalizer, contains_weakptr) size_gc_header = self.gcheaderbuilder.size_gc_header totalsize = size_gc_header + size result = self.nursery_free if raw_malloc_usage(totalsize) > self.nursery_top - result: result = self.collect_nursery() llarena.arena_reserve(result, totalsize) # GCFLAG_NO_YOUNG_PTRS is never set on young objs self.init_gc_object(result, typeid, flags=0) self.nursery_free = result + totalsize if contains_weakptr: self.young_objects_with_weakrefs.append(result + size_gc_header) return llmemory.cast_adr_to_ptr(result+size_gc_header, llmemory.GCREF)
def coalloc_fixedsize_clear(self, coallocator, typeid, size): # note: a coallocated object can never return a weakref, since the # coallocation analysis is done at a time where weakrefs are # represented as opaque objects which aren't allocated using malloc but # with weakref_create if self.is_in_nursery(coallocator): return self.malloc_fixedsize_clear(typeid, size, True, False, False) else: return SemiSpaceGC.malloc_fixedsize_clear(self, typeid, size, True, False, False)