static void* major_alloc_heap (mword nursery_size, mword nursery_align, int the_nursery_bits) { char *heap_start; mword major_heap_size = ms_heap_num_blocks * MS_BLOCK_SIZE; mword alloc_size = nursery_size + major_heap_size; int i; g_assert (ms_heap_num_blocks > 0); g_assert (nursery_size % MS_BLOCK_SIZE == 0); if (nursery_align) g_assert (nursery_align % MS_BLOCK_SIZE == 0); nursery_start = mono_sgen_alloc_os_memory_aligned (alloc_size, nursery_align ? nursery_align : MS_BLOCK_SIZE, TRUE); nursery_end = heap_start = nursery_start + nursery_size; nursery_bits = the_nursery_bits; ms_heap_end = heap_start + major_heap_size; block_infos = mono_sgen_alloc_internal_dynamic (sizeof (MSBlockInfo) * ms_heap_num_blocks, INTERNAL_MEM_MS_BLOCK_INFO); for (i = 0; i < ms_heap_num_blocks; ++i) { block_infos [i].block = heap_start + i * MS_BLOCK_SIZE; if (i < ms_heap_num_blocks - 1) block_infos [i].next_free = &block_infos [i + 1]; else block_infos [i].next_free = NULL; } empty_blocks = &block_infos [0]; return nursery_start; }
/* * Allocate a new section of memory to be used as old generation. */ static GCMemSection* alloc_major_section (void) { GCMemSection *section; int scan_starts; section = mono_sgen_alloc_os_memory_aligned (MAJOR_SECTION_SIZE, MAJOR_SECTION_SIZE, TRUE); section->next_data = section->data = (char*)section + SGEN_SIZEOF_GC_MEM_SECTION; g_assert (!((mword)section->data & 7)); section->size = MAJOR_SECTION_SIZE - SGEN_SIZEOF_GC_MEM_SECTION; section->end_data = section->data + section->size; mono_sgen_update_heap_boundaries ((mword)section->data, (mword)section->end_data); DEBUG (3, fprintf (gc_debug_file, "New major heap section: (%p-%p), total: %ld\n", section->data, section->end_data, mono_gc_get_heap_size ())); scan_starts = (section->size + SGEN_SCAN_START_SIZE - 1) / SGEN_SCAN_START_SIZE; section->scan_starts = mono_sgen_alloc_internal_dynamic (sizeof (char*) * scan_starts, INTERNAL_MEM_SCAN_STARTS); section->num_scan_start = scan_starts; section->block.role = MEMORY_ROLE_GEN1; section->is_to_space = TRUE; /* add to the section list */ section->block.next = section_list; section_list = section; ++num_major_sections; return section; }
static gpointer alloc_sb (Descriptor *desc) { gpointer sb_header = mono_sgen_alloc_os_memory_aligned (SB_SIZE, SB_SIZE, TRUE); g_assert (sb_header == SB_HEADER_FOR_ADDR (sb_header)); DESCRIPTOR_FOR_ADDR (sb_header) = desc; //g_print ("sb %p for %p\n", sb_header, desc); return (char*)sb_header + SB_HEADER_SIZE; }
static void* major_alloc_heap (mword nursery_size, mword nursery_align, int the_nursery_bits) { if (nursery_align) nursery_start = mono_sgen_alloc_os_memory_aligned (nursery_size, nursery_align, TRUE); else nursery_start = mono_sgen_alloc_os_memory (nursery_size, TRUE); nursery_end = nursery_start + nursery_size; nursery_bits = the_nursery_bits; return nursery_start; }
static void* ms_get_empty_block (void) { char *p; int i; void *block, *empty, *next; retry: if (!empty_blocks) { p = mono_sgen_alloc_os_memory_aligned (MS_BLOCK_SIZE * MS_BLOCK_ALLOC_NUM, MS_BLOCK_SIZE, TRUE); for (i = 0; i < MS_BLOCK_ALLOC_NUM; ++i) { block = p; /* * We do the free list update one after the * other so that other threads can use the new * blocks as quickly as possible. */ do { empty = empty_blocks; *(void**)block = empty; } while (SGEN_CAS_PTR (&empty_blocks, block, empty) != empty); p += MS_BLOCK_SIZE; } SGEN_ATOMIC_ADD (num_empty_blocks, MS_BLOCK_ALLOC_NUM); stat_major_blocks_alloced += MS_BLOCK_ALLOC_NUM; } do { empty = empty_blocks; if (!empty) goto retry; block = empty; next = *(void**)block; } while (SGEN_CAS_PTR (&empty_blocks, next, empty) != empty); SGEN_ATOMIC_ADD (num_empty_blocks, -1); *(void**)block = NULL; g_assert (!((mword)block & (MS_BLOCK_SIZE - 1))); mono_sgen_update_heap_boundaries ((mword)block, (mword)block + MS_BLOCK_SIZE); return block; }
static SgenPinnedChunk* alloc_pinned_chunk (SgenPinnedAllocator *alc) { SgenPinnedChunk *chunk; int offset; int size = SGEN_PINNED_CHUNK_SIZE; chunk = mono_sgen_alloc_os_memory_aligned (size, size, TRUE); chunk->block.role = MEMORY_ROLE_PINNED; mono_sgen_update_heap_boundaries ((mword)chunk, ((mword)chunk + size)); pinned_chunk_bytes_alloced += size; /* setup the bookeeping fields */ chunk->num_pages = size / FREELIST_PAGESIZE; offset = G_STRUCT_OFFSET (SgenPinnedChunk, data); chunk->page_sizes = (void*)((char*)chunk + offset); offset += sizeof (int) * chunk->num_pages; offset = SGEN_ALIGN_UP (offset); chunk->free_list = (void*)((char*)chunk + offset); offset += sizeof (void*) * SGEN_PINNED_FREELIST_NUM_SLOTS; offset = SGEN_ALIGN_UP (offset); chunk->start_data = (void*)((char*)chunk + offset); /* allocate the first page to the freelist */ chunk->page_sizes [0] = PINNED_FIRST_SLOT_SIZE; build_freelist (alc, chunk, slot_for_size (PINNED_FIRST_SLOT_SIZE), PINNED_FIRST_SLOT_SIZE, chunk->start_data, ((char*)chunk + FREELIST_PAGESIZE)); mono_sgen_debug_printf (4, "Allocated pinned chunk %p, size: %d\n", chunk, size); chunk->block.next = alc->chunk_list; alc->chunk_list = chunk; chunk->allocator = alc; return chunk; }