2 * Copyright 2001-2003 Ximian, Inc
3 * Copyright 2003-2010 Novell, Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 #ifndef __MONO_SGENGC_H__
25 #define __MONO_SGENGC_H__
32 #include <mono/utils/mono-compiler.h>
33 #include <mono/metadata/class-internals.h>
34 #include <mono/metadata/object-internals.h>
36 #define SGEN_PARALLEL_MARK
39 * Turning on heavy statistics will turn off the managed allocator and
40 * the managed write barrier.
42 //#define HEAVY_STATISTICS
45 * If this is set, the nursery is aligned to an address aligned to its size, ie.
46 * a 1MB nursery will be aligned to an address divisible by 1MB. This allows us to
47 * speed up ptr_in_nursery () checks which are very frequent. This requires the
48 * nursery size to be a compile time constant.
50 #define SGEN_ALIGN_NURSERY 1
52 //#define SGEN_BINARY_PROTOCOL
54 #define SGEN_MAX_DEBUG_LEVEL 2
56 #define THREAD_HASH_SIZE 11
58 #define GC_BITS_PER_WORD (sizeof (mword) * 8)
60 #define ARCH_THREAD_TYPE pthread_t
61 #define ARCH_GET_THREAD pthread_self
62 #define ARCH_THREAD_EQUALS(a,b) pthread_equal (a, b)
64 #if SIZEOF_VOID_P == 4
65 typedef guint32 mword
;
67 typedef guint64 mword
;
70 /* for use with write barriers */
71 typedef struct _RememberedSet RememberedSet
;
72 struct _RememberedSet
{
76 mword data
[MONO_ZERO_LEN_ARRAY
];
79 /* eventually share with MonoThread? */
80 typedef struct _SgenThreadInfo SgenThreadInfo
;
82 struct _SgenThreadInfo
{
85 unsigned int stop_count
; /* to catch duplicate signals */
88 volatile int in_critical_region
;
91 void *stack_start_limit
;
92 char **tlab_next_addr
;
93 char **tlab_start_addr
;
94 char **tlab_temp_end_addr
;
95 char **tlab_real_end_addr
;
96 gpointer
**store_remset_buffer_addr
;
97 long *store_remset_buffer_index_addr
;
98 RememberedSet
*remset
;
99 gpointer runtime_data
;
100 gpointer stopped_ip
; /* only valid if the thread is stopped */
101 MonoDomain
*stopped_domain
; /* ditto */
102 gpointer
*stopped_regs
; /* ditto */
103 #ifndef HAVE_KW_THREAD
108 gpointer
*store_remset_buffer
;
109 long store_remset_buffer_index
;
120 typedef struct _SgenBlock SgenBlock
;
127 * The nursery section and the major copying collector's sections use
130 typedef struct _GCMemSection GCMemSection
;
131 struct _GCMemSection
{
135 /* pointer where more data could be allocated if it fits */
139 * scan starts is an array of pointers to objects equally spaced in the allocation area
140 * They let use quickly find pinned objects from pinning pointers.
143 /* in major collections indexes in the pin_queue for objects that pin this section */
144 void **pin_queue_start
;
145 int pin_queue_num_entries
;
146 unsigned short num_scan_start
;
147 gboolean is_to_space
;
150 #define SGEN_SIZEOF_GC_MEM_SECTION ((sizeof (GCMemSection) + 7) & ~7)
153 * to quickly find the head of an object pinned by a conservative
154 * address we keep track of the objects allocated for each
155 * SGEN_SCAN_START_SIZE memory chunk in the nursery or other memory
156 * sections. Larger values have less memory overhead and bigger
157 * runtime cost. 4-8 KB are reasonable values.
159 #define SGEN_SCAN_START_SIZE (4096*2)
162 * Objects bigger then this go into the large object space. This size
163 * has a few constraints. It must fit into the major heap, which in
164 * the case of the copying collector means that it must fit into a
165 * pinned chunk. It must also play well with the GC descriptors, some
166 * of which (DESC_TYPE_RUN_LENGTH, DESC_TYPE_SMALL_BITMAP) encode the
169 #define SGEN_MAX_SMALL_OBJ_SIZE 8000
171 /* This is also the MAJOR_SECTION_SIZE for the copying major
173 #define SGEN_PINNED_CHUNK_SIZE (128 * 1024)
175 #define SGEN_PINNED_CHUNK_FOR_PTR(o) ((SgenBlock*)(((mword)(o)) & ~(SGEN_PINNED_CHUNK_SIZE - 1)))
177 typedef struct _SgenPinnedChunk SgenPinnedChunk
;
180 const static int suspend_signal_num
= SIGXFSZ
;
182 const static int suspend_signal_num
= SIGPWR
;
184 const static int restart_signal_num
= SIGXCPU
;
187 * Recursion is not allowed for the thread lock.
189 #define LOCK_DECLARE(name) pthread_mutex_t name = PTHREAD_MUTEX_INITIALIZER
190 #define LOCK_INIT(name)
191 #define LOCK_GC pthread_mutex_lock (&gc_mutex)
192 #define UNLOCK_GC pthread_mutex_unlock (&gc_mutex)
193 #define LOCK_INTERRUPTION pthread_mutex_lock (&interruption_mutex)
194 #define UNLOCK_INTERRUPTION pthread_mutex_unlock (&interruption_mutex)
196 #ifdef SGEN_PARALLEL_MARK
197 #define LOCK_GLOBAL_REMSET pthread_mutex_lock (&global_remset_mutex)
198 #define UNLOCK_GLOBAL_REMSET pthread_mutex_unlock (&global_remset_mutex)
200 #define LOCK_GLOBAL_REMSET
201 #define UNLOCK_GLOBAL_REMSET
204 #ifdef SGEN_PARALLEL_MARK
205 #define SGEN_CAS_PTR InterlockedCompareExchangePointer
206 #define SGEN_ATOMIC_ADD(x,i) do { \
210 } while (InterlockedCompareExchange (&(x), __old_x + (i), __old_x) != __old_x); \
213 #define SGEN_CAS_PTR(p,n,c) ((*(void**)(p) == (void*)(c)) ? (*(void**)(p) = (void*)(n), (void*)(c)) : (*(void**)(p)))
214 #define SGEN_ATOMIC_ADD(x,i) ((x) += (i))
217 /* non-pthread will need to provide their own version of start/stop */
218 #define USE_SIGNAL_BASED_START_STOP_WORLD 1
219 /* we intercept pthread_create calls to know which threads exist */
220 #define USE_PTHREAD_INTERCEPT 1
222 #ifdef HEAVY_STATISTICS
223 #define HEAVY_STAT(x) x
225 extern long long stat_objects_alloced_degraded
;
226 extern long long stat_bytes_alloced_degraded
;
227 extern long long stat_copy_object_called_major
;
228 extern long long stat_objects_copied_major
;
230 #define HEAVY_STAT(x)
233 #define SGEN_ALLOC_ALIGN 8
234 #define SGEN_ALLOC_ALIGN_BITS 3
236 #define SGEN_ALIGN_UP(s) (((s)+(SGEN_ALLOC_ALIGN-1)) & ~(SGEN_ALLOC_ALIGN-1))
238 #ifdef SGEN_ALIGN_NURSERY
239 #define SGEN_PTR_IN_NURSERY(p,bits,start,end) (((mword)(p) & ~((1 << (bits)) - 1)) == (mword)(start))
241 #define SGEN_PTR_IN_NURSERY(p,bits,start,end) ((char*)(p) >= (start) && (char*)(p) < (end))
244 /* Structure that corresponds to a MonoVTable: desc is a mword so requires
245 * no cast from a pointer to an integer
252 /* these bits are set in the object vtable: we could merge them since an object can be
253 * either pinned or forwarded but not both.
254 * We store them in the vtable slot because the bits are used in the sync block for
255 * other purposes: if we merge them and alloc the sync blocks aligned to 8 bytes, we can change
256 * this and use bit 3 in the syncblock (with the lower two bits both set for forwarded, that
257 * would be an invalid combination for the monitor and hash code).
258 * The values are already shifted.
259 * The forwarding address is stored in the sync block.
261 #define SGEN_FORWARDED_BIT 1
262 #define SGEN_PINNED_BIT 2
263 #define SGEN_VTABLE_BITS_MASK 0x3
265 /* returns NULL if not forwarded, or the forwarded address */
266 #define SGEN_OBJECT_IS_FORWARDED(obj) (((mword*)(obj))[0] & SGEN_FORWARDED_BIT ? (void*)(((mword*)(obj))[0] & ~SGEN_VTABLE_BITS_MASK) : NULL)
267 #define SGEN_OBJECT_IS_PINNED(obj) (((mword*)(obj))[0] & SGEN_PINNED_BIT)
269 /* set the forwarded address fw_addr for object obj */
270 #define SGEN_FORWARD_OBJECT(obj,fw_addr) do { \
271 ((mword*)(obj))[0] = (mword)(fw_addr) | SGEN_FORWARDED_BIT; \
273 #define SGEN_PIN_OBJECT(obj) do { \
274 ((mword*)(obj))[0] |= SGEN_PINNED_BIT; \
276 #define SGEN_UNPIN_OBJECT(obj) do { \
277 ((mword*)(obj))[0] &= ~SGEN_PINNED_BIT; \
281 * Since we set bits in the vtable, use the macro to load it from the pointer to
282 * an object that is potentially pinned.
284 #define SGEN_LOAD_VTABLE(addr) ((*(mword*)(addr)) & ~SGEN_VTABLE_BITS_MASK)
287 * ######################################################################
288 * ######## GC descriptors
289 * ######################################################################
290 * Used to quickly get the info the GC needs about an object: size and
291 * where the references are held.
293 #define OBJECT_HEADER_WORDS (sizeof(MonoObject)/sizeof(gpointer))
294 #define LOW_TYPE_BITS 3
295 #define SMALL_BITMAP_SHIFT 16
296 #define SMALL_BITMAP_SIZE (GC_BITS_PER_WORD - SMALL_BITMAP_SHIFT)
297 #define VECTOR_INFO_SHIFT 14
298 #define VECTOR_ELSIZE_SHIFT 3
299 #define LARGE_BITMAP_SIZE (GC_BITS_PER_WORD - LOW_TYPE_BITS)
300 #define MAX_ELEMENT_SIZE 0x3ff
301 #define VECTOR_SUBTYPE_PTRFREE (DESC_TYPE_V_PTRFREE << VECTOR_INFO_SHIFT)
302 #define VECTOR_SUBTYPE_REFS (DESC_TYPE_V_REFS << VECTOR_INFO_SHIFT)
303 #define VECTOR_SUBTYPE_RUN_LEN (DESC_TYPE_V_RUN_LEN << VECTOR_INFO_SHIFT)
304 #define VECTOR_SUBTYPE_BITMAP (DESC_TYPE_V_BITMAP << VECTOR_INFO_SHIFT)
306 /* objects are aligned to 8 bytes boundaries
307 * A descriptor is a pointer in MonoVTable, so 32 or 64 bits of size.
308 * The low 3 bits define the type of the descriptor. The other bits
309 * depend on the type.
310 * As a general rule the 13 remaining low bits define the size, either
311 * of the whole object or of the elements in the arrays. While for objects
312 * the size is already in bytes, for arrays we need to shift, because
313 * array elements might be smaller than 8 bytes. In case of arrays, we
314 * use two bits to describe what the additional high bits represents,
315 * so the default behaviour can handle element sizes less than 2048 bytes.
316 * The high 16 bits, if 0 it means the object is pointer-free.
317 * This design should make it easy and fast to skip over ptr-free data.
318 * The first 4 types should cover >95% of the objects.
319 * Note that since the size of objects is limited to 64K, larger objects
320 * will be allocated in the large object heap.
321 * If we want 4-bytes alignment, we need to put vector and small bitmap
326 * We don't use 0 so that 0 isn't a valid GC descriptor. No
327 * deep reason for this other than to be able to identify a
328 * non-inited descriptor for debugging.
330 * If an object contains no references, its GC descriptor is
331 * always DESC_TYPE_RUN_LENGTH, without a size, no exceptions.
332 * This is so that we can quickly check for that in
333 * copy_object_no_checks(), without having to fetch the
336 DESC_TYPE_RUN_LENGTH
= 1, /* 15 bits aligned byte size | 1-3 (offset, numptr) bytes tuples */
337 DESC_TYPE_SMALL_BITMAP
, /* 15 bits aligned byte size | 16-48 bit bitmap */
338 DESC_TYPE_COMPLEX
, /* index for bitmap into complex_descriptors */
339 DESC_TYPE_VECTOR
, /* 10 bits element size | 1 bit array | 2 bits desc | element desc */
340 DESC_TYPE_ARRAY
, /* 10 bits element size | 1 bit array | 2 bits desc | element desc */
341 DESC_TYPE_LARGE_BITMAP
, /* | 29-61 bitmap bits */
342 DESC_TYPE_COMPLEX_ARR
, /* index for bitmap into complex_descriptors */
343 /* subtypes for arrays and vectors */
344 DESC_TYPE_V_PTRFREE
= 0,/* there are no refs: keep first so it has a zero value */
345 DESC_TYPE_V_REFS
, /* all the array elements are refs */
346 DESC_TYPE_V_RUN_LEN
, /* elements are run-length encoded as DESC_TYPE_RUN_LENGTH */
347 DESC_TYPE_V_BITMAP
/* elements are as the bitmap in DESC_TYPE_SMALL_BITMAP */
350 #define SGEN_VTABLE_HAS_REFERENCES(vt) (((MonoVTable*)(vt))->gc_descr != (void*)DESC_TYPE_RUN_LENGTH)
352 /* helper macros to scan and traverse objects, macros because we resue them in many functions */
353 #define OBJ_RUN_LEN_SIZE(size,desc,obj) do { \
354 (size) = ((desc) & 0xfff8) >> 1; \
357 #define OBJ_BITMAP_SIZE(size,desc,obj) do { \
358 (size) = ((desc) & 0xfff8) >> 1; \
361 //#define PREFETCH(addr) __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(addr)))
362 #define PREFETCH(addr)
364 /* code using these macros must define a HANDLE_PTR(ptr) macro that does the work */
365 #define OBJ_RUN_LEN_FOREACH_PTR(desc,obj) do { \
366 if ((desc) & 0xffff0000) { \
367 /* there are pointers */ \
368 void **_objptr_end; \
369 void **_objptr = (void**)(obj); \
370 _objptr += ((desc) >> 16) & 0xff; \
371 _objptr_end = _objptr + (((desc) >> 24) & 0xff); \
372 while (_objptr < _objptr_end) { \
373 HANDLE_PTR (_objptr, (obj)); \
379 /* a bitmap desc means that there are pointer references or we'd have
380 * choosen run-length, instead: add an assert to check.
382 #define OBJ_BITMAP_FOREACH_PTR(desc,obj) do { \
383 /* there are pointers */ \
384 void **_objptr = (void**)(obj); \
385 gsize _bmap = (desc) >> 16; \
386 _objptr += OBJECT_HEADER_WORDS; \
389 HANDLE_PTR (_objptr, (obj)); \
396 #define OBJ_LARGE_BITMAP_FOREACH_PTR(vt,obj) do { \
397 /* there are pointers */ \
398 void **_objptr = (void**)(obj); \
399 gsize _bmap = (vt)->desc >> LOW_TYPE_BITS; \
400 _objptr += OBJECT_HEADER_WORDS; \
403 HANDLE_PTR (_objptr, (obj)); \
410 gsize
* mono_sgen_get_complex_descriptor (GCVTable
*vt
) MONO_INTERNAL
;
412 #define OBJ_COMPLEX_FOREACH_PTR(vt,obj) do { \
413 /* there are pointers */ \
414 void **_objptr = (void**)(obj); \
415 gsize *bitmap_data = mono_sgen_get_complex_descriptor ((vt)); \
416 int bwords = (*bitmap_data) - 1; \
417 void **start_run = _objptr; \
420 MonoObject *myobj = (MonoObject*)obj; \
421 g_print ("found %d at %p (0x%zx): %s.%s\n", bwords, (obj), (vt)->desc, myobj->vtable->klass->name_space, myobj->vtable->klass->name); \
423 while (bwords-- > 0) { \
424 gsize _bmap = *bitmap_data++; \
425 _objptr = start_run; \
426 /*g_print ("bitmap: 0x%x/%d at %p\n", _bmap, bwords, _objptr);*/ \
429 HANDLE_PTR (_objptr, (obj)); \
434 start_run += GC_BITS_PER_WORD; \
438 /* this one is untested */
439 #define OBJ_COMPLEX_ARR_FOREACH_PTR(vt,obj) do { \
440 /* there are pointers */ \
441 gsize *mbitmap_data = mono_sgen_get_complex_descriptor ((vt)); \
442 int mbwords = (*mbitmap_data++) - 1; \
443 int el_size = mono_array_element_size (vt->klass); \
444 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
445 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
447 g_print ("found %d at %p (0x%zx): %s.%s\n", mbwords, (obj), (vt)->desc, vt->klass->name_space, vt->klass->name); \
448 while (e_start < e_end) { \
449 void **_objptr = (void**)e_start; \
450 gsize *bitmap_data = mbitmap_data; \
451 unsigned int bwords = mbwords; \
452 while (bwords-- > 0) { \
453 gsize _bmap = *bitmap_data++; \
454 void **start_run = _objptr; \
455 /*g_print ("bitmap: 0x%x\n", _bmap);*/ \
458 HANDLE_PTR (_objptr, (obj)); \
463 _objptr = start_run + GC_BITS_PER_WORD; \
465 e_start += el_size; \
469 #define OBJ_VECTOR_FOREACH_PTR(vt,obj) do { \
470 /* note: 0xffffc000 excludes DESC_TYPE_V_PTRFREE */ \
471 if ((vt)->desc & 0xffffc000) { \
472 int el_size = ((vt)->desc >> 3) & MAX_ELEMENT_SIZE; \
473 /* there are pointers */ \
474 int etype = (vt)->desc & 0xc000; \
475 if (etype == (DESC_TYPE_V_REFS << 14)) { \
476 void **p = (void**)((char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector)); \
477 void **end_refs = (void**)((char*)p + el_size * mono_array_length_fast ((MonoArray*)(obj))); \
478 /* Note: this code can handle also arrays of struct with only references in them */ \
479 while (p < end_refs) { \
480 HANDLE_PTR (p, (obj)); \
483 } else if (etype == DESC_TYPE_V_RUN_LEN << 14) { \
484 int offset = ((vt)->desc >> 16) & 0xff; \
485 int num_refs = ((vt)->desc >> 24) & 0xff; \
486 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
487 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
488 while (e_start < e_end) { \
489 void **p = (void**)e_start; \
492 for (i = 0; i < num_refs; ++i) { \
493 HANDLE_PTR (p + i, (obj)); \
495 e_start += el_size; \
497 } else if (etype == DESC_TYPE_V_BITMAP << 14) { \
498 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
499 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
500 while (e_start < e_end) { \
501 void **p = (void**)e_start; \
502 gsize _bmap = (vt)->desc >> 16; \
503 /* Note: there is no object header here to skip */ \
506 HANDLE_PTR (p, (obj)); \
511 e_start += el_size; \
517 typedef struct _SgenInternalAllocator SgenInternalAllocator
;
519 #define SGEN_GRAY_QUEUE_SECTION_SIZE (128 - 3)
522 * This is a stack now instead of a queue, so the most recently added items are removed
523 * first, improving cache locality, and keeping the stack size manageable.
525 typedef struct _GrayQueueSection GrayQueueSection
;
526 struct _GrayQueueSection
{
528 GrayQueueSection
*next
;
529 char *objects
[SGEN_GRAY_QUEUE_SECTION_SIZE
];
532 typedef struct _SgenGrayQueue SgenGrayQueue
;
534 typedef void (*GrayQueueAllocPrepareFunc
) (SgenGrayQueue
*);
536 struct _SgenGrayQueue
{
537 SgenInternalAllocator
*allocator
;
538 GrayQueueSection
*first
;
539 GrayQueueSection
*free_list
;
541 GrayQueueAllocPrepareFunc alloc_prepare_func
;
542 void *alloc_prepare_data
;
545 #if SGEN_MAX_DEBUG_LEVEL >= 9
546 #define GRAY_OBJECT_ENQUEUE gray_object_enqueue
547 #define GRAY_OBJECT_DEQUEUE(queue,o) ((o) = gray_object_dequeue ((queue)))
549 #define GRAY_OBJECT_ENQUEUE(queue,o) do { \
550 if (G_UNLIKELY (!(queue)->first || (queue)->first->end == SGEN_GRAY_QUEUE_SECTION_SIZE)) \
551 mono_sgen_gray_object_enqueue ((queue), (o)); \
553 (queue)->first->objects [(queue)->first->end++] = (o); \
555 #define GRAY_OBJECT_DEQUEUE(queue,o) do { \
556 if (!(queue)->first) \
558 else if (G_UNLIKELY ((queue)->first->end == 1)) \
559 (o) = mono_sgen_gray_object_dequeue ((queue)); \
561 (o) = (queue)->first->objects [--(queue)->first->end]; \
565 void mono_sgen_gray_object_enqueue (SgenGrayQueue
*queue
, char *obj
) MONO_INTERNAL
;
566 char* mono_sgen_gray_object_dequeue (SgenGrayQueue
*queue
) MONO_INTERNAL
;
568 typedef void (*IterateObjectCallbackFunc
) (char*, size_t, void*);
570 void* mono_sgen_alloc_os_memory (size_t size
, int activate
) MONO_INTERNAL
;
571 void* mono_sgen_alloc_os_memory_aligned (mword size
, mword alignment
, gboolean activate
) MONO_INTERNAL
;
572 void mono_sgen_free_os_memory (void *addr
, size_t size
) MONO_INTERNAL
;
574 int mono_sgen_thread_handshake (int signum
) MONO_INTERNAL
;
575 SgenThreadInfo
* mono_sgen_thread_info_lookup (ARCH_THREAD_TYPE id
) MONO_INTERNAL
;
576 SgenThreadInfo
** mono_sgen_get_thread_table (void) MONO_INTERNAL
;
577 void mono_sgen_wait_for_suspend_ack (int count
) MONO_INTERNAL
;
579 gboolean
mono_sgen_is_worker_thread (pthread_t thread
) MONO_INTERNAL
;
581 void mono_sgen_update_heap_boundaries (mword low
, mword high
) MONO_INTERNAL
;
583 void mono_sgen_register_major_sections_alloced (int num_sections
) MONO_INTERNAL
;
584 mword
mono_sgen_get_minor_collection_allowance (void) MONO_INTERNAL
;
586 void mono_sgen_scan_area_with_callback (char *start
, char *end
, IterateObjectCallbackFunc callback
, void *data
) MONO_INTERNAL
;
587 void mono_sgen_check_section_scan_starts (GCMemSection
*section
) MONO_INTERNAL
;
589 /* Keep in sync with mono_sgen_dump_internal_mem_usage() in dump_heap()! */
591 INTERNAL_MEM_MANAGED
,
592 INTERNAL_MEM_PIN_QUEUE
,
593 INTERNAL_MEM_FRAGMENT
,
594 INTERNAL_MEM_SECTION
,
595 INTERNAL_MEM_SCAN_STARTS
,
596 INTERNAL_MEM_FIN_TABLE
,
597 INTERNAL_MEM_FINALIZE_ENTRY
,
598 INTERNAL_MEM_DISLINK_TABLE
,
599 INTERNAL_MEM_DISLINK
,
600 INTERNAL_MEM_ROOTS_TABLE
,
601 INTERNAL_MEM_ROOT_RECORD
,
602 INTERNAL_MEM_STATISTICS
,
604 INTERNAL_MEM_GRAY_QUEUE
,
605 INTERNAL_MEM_STORE_REMSET
,
606 INTERNAL_MEM_MS_TABLES
,
607 INTERNAL_MEM_MS_BLOCK_INFO
,
608 INTERNAL_MEM_EPHEMERON_LINK
,
609 INTERNAL_MEM_WORKER_DATA
,
613 #define SGEN_INTERNAL_FREELIST_NUM_SLOTS 30
615 struct _SgenInternalAllocator
{
616 SgenPinnedChunk
*chunk_list
;
617 SgenPinnedChunk
*free_lists
[SGEN_INTERNAL_FREELIST_NUM_SLOTS
];
618 void *delayed_free_lists
[SGEN_INTERNAL_FREELIST_NUM_SLOTS
];
619 long small_internal_mem_bytes
[INTERNAL_MEM_MAX
];
622 void mono_sgen_init_internal_allocator (void) MONO_INTERNAL
;
624 SgenInternalAllocator
* mono_sgen_get_unmanaged_allocator (void) MONO_INTERNAL
;
626 const char* mono_sgen_internal_mem_type_name (int type
) MONO_INTERNAL
;
627 void mono_sgen_report_internal_mem_usage (void) MONO_INTERNAL
;
628 void mono_sgen_report_internal_mem_usage_full (SgenInternalAllocator
*alc
) MONO_INTERNAL
;
629 void mono_sgen_dump_internal_mem_usage (FILE *heap_dump_file
) MONO_INTERNAL
;
630 void mono_sgen_dump_section (GCMemSection
*section
, const char *type
) MONO_INTERNAL
;
631 void mono_sgen_dump_occupied (char *start
, char *end
, char *section_start
) MONO_INTERNAL
;
633 void mono_sgen_register_moved_object (void *obj
, void *destination
) MONO_INTERNAL
;
635 void mono_sgen_register_fixed_internal_mem_type (int type
, size_t size
) MONO_INTERNAL
;
637 void* mono_sgen_alloc_internal (int type
) MONO_INTERNAL
;
638 void mono_sgen_free_internal (void *addr
, int type
) MONO_INTERNAL
;
640 void* mono_sgen_alloc_internal_dynamic (size_t size
, int type
) MONO_INTERNAL
;
641 void mono_sgen_free_internal_dynamic (void *addr
, size_t size
, int type
) MONO_INTERNAL
;
643 void* mono_sgen_alloc_internal_fixed (SgenInternalAllocator
*allocator
, int type
) MONO_INTERNAL
;
644 void mono_sgen_free_internal_fixed (SgenInternalAllocator
*allocator
, void *addr
, int type
) MONO_INTERNAL
;
646 void* mono_sgen_alloc_internal_full (SgenInternalAllocator
*allocator
, size_t size
, int type
) MONO_INTERNAL
;
647 void mono_sgen_free_internal_full (SgenInternalAllocator
*allocator
, void *addr
, size_t size
, int type
) MONO_INTERNAL
;
649 void mono_sgen_free_internal_delayed (void *addr
, int type
, SgenInternalAllocator
*thread_allocator
) MONO_INTERNAL
;
651 void mono_sgen_debug_printf (int level
, const char *format
, ...) MONO_INTERNAL
;
653 void mono_sgen_internal_scan_objects (SgenInternalAllocator
*alc
, IterateObjectCallbackFunc callback
, void *callback_data
) MONO_INTERNAL
;
654 void mono_sgen_internal_scan_pinned_objects (SgenInternalAllocator
*alc
, IterateObjectCallbackFunc callback
, void *callback_data
) MONO_INTERNAL
;
656 void** mono_sgen_find_optimized_pin_queue_area (void *start
, void *end
, int *num
) MONO_INTERNAL
;
657 void mono_sgen_find_section_pin_queue_start_end (GCMemSection
*section
) MONO_INTERNAL
;
658 void mono_sgen_pin_objects_in_section (GCMemSection
*section
, SgenGrayQueue
*queue
) MONO_INTERNAL
;
660 void mono_sgen_pin_stats_register_object (char *obj
, size_t size
);
662 void mono_sgen_add_to_global_remset (gpointer ptr
) MONO_INTERNAL
;
664 typedef struct _SgenMajorCollector SgenMajorCollector
;
665 struct _SgenMajorCollector
{
668 gboolean (*is_object_live
) (char *obj
);
669 void* (*alloc_small_pinned_obj
) (size_t size
, gboolean has_references
);
670 void* (*alloc_degraded
) (MonoVTable
*vtable
, size_t size
);
671 void (*copy_or_mark_object
) (void **obj_slot
, SgenGrayQueue
*queue
);
672 void (*minor_scan_object
) (char *start
, SgenGrayQueue
*queue
);
673 char* (*minor_scan_vtype
) (char *start
, mword desc
, char* from_start
, char* from_end
, SgenGrayQueue
*queue
);
674 void (*major_scan_object
) (char *start
, SgenGrayQueue
*queue
);
675 void (*copy_object
) (void **obj_slot
, SgenGrayQueue
*queue
);
676 void* (*alloc_object
) (int size
, gboolean has_references
);
677 void (*free_pinned_object
) (char *obj
, size_t size
);
678 void (*iterate_objects
) (gboolean non_pinned
, gboolean pinned
, IterateObjectCallbackFunc callback
, void *data
);
679 void (*free_non_pinned_object
) (char *obj
, size_t size
);
680 void (*find_pin_queue_start_ends
) (SgenGrayQueue
*queue
);
681 void (*pin_objects
) (SgenGrayQueue
*queue
);
682 void (*init_to_space
) (void);
683 void (*sweep
) (void);
684 void (*check_scan_starts
) (void);
685 void (*dump_heap
) (FILE *heap_dump_file
);
686 gint64 (*get_used_size
) (void);
687 void (*start_nursery_collection
) (void);
688 void (*finish_nursery_collection
) (void);
689 void (*finish_major_collection
) (void);
690 gboolean (*ptr_is_in_non_pinned_space
) (char *ptr
);
691 gboolean (*obj_is_from_pinned_alloc
) (char *obj
);
692 void (*report_pinned_memory_usage
) (void);
693 int (*get_num_major_sections
) (void);
696 void mono_sgen_marksweep_init (SgenMajorCollector
*collector
, int nursery_bits
, char *nursery_start
, char *nursery_end
) MONO_INTERNAL
;
697 void mono_sgen_copying_init (SgenMajorCollector
*collector
, int the_nursery_bits
, char *the_nursery_start
, char *the_nursery_end
) MONO_INTERNAL
;
700 * This function can be called on an object whose first word, the
701 * vtable field, is not intact. This is necessary for the parallel
705 mono_sgen_par_object_get_size (MonoVTable
*vtable
, MonoObject
* o
)
707 MonoClass
*klass
= vtable
->klass
;
709 * We depend on mono_string_length_fast and
710 * mono_array_length_fast not using the object's vtable.
712 if (klass
== mono_defaults
.string_class
) {
713 return sizeof (MonoString
) + 2 * mono_string_length_fast ((MonoString
*) o
) + 2;
714 } else if (klass
->rank
) {
715 MonoArray
*array
= (MonoArray
*)o
;
716 size_t size
= sizeof (MonoArray
) + klass
->sizes
.element_size
* mono_array_length_fast (array
);
717 if (G_UNLIKELY (array
->bounds
)) {
718 size
+= sizeof (mono_array_size_t
) - 1;
719 size
&= ~(sizeof (mono_array_size_t
) - 1);
720 size
+= sizeof (MonoArrayBounds
) * klass
->rank
;
724 /* from a created object: the class must be inited already */
725 return klass
->instance_size
;
729 #define mono_sgen_safe_object_get_size(o) mono_sgen_par_object_get_size ((MonoVTable*)SGEN_LOAD_VTABLE ((o)), (o))
731 #endif /* __MONO_SGENGC_H__ */