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__
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/metadata/class-internals.h>
37 #include <mono/metadata/object-internals.h>
38 #include <mono/metadata/sgen-archdep.h>
40 #include <mach/mach_port.h>
44 * Turning on heavy statistics will turn off the managed allocator and
45 * the managed write barrier.
47 //#define HEAVY_STATISTICS
50 * If this is set, the nursery is aligned to an address aligned to its size, ie.
51 * a 1MB nursery will be aligned to an address divisible by 1MB. This allows us to
52 * speed up ptr_in_nursery () checks which are very frequent. This requires the
53 * nursery size to be a compile time constant.
55 #define SGEN_ALIGN_NURSERY 1
57 //#define SGEN_BINARY_PROTOCOL
59 #define SGEN_MAX_DEBUG_LEVEL 2
61 #define THREAD_HASH_SIZE 11
63 #define GC_BITS_PER_WORD (sizeof (mword) * 8)
65 #define ARCH_THREAD_TYPE pthread_t
66 #define ARCH_GET_THREAD pthread_self
67 #define ARCH_THREAD_EQUALS(a,b) pthread_equal (a, b)
69 #if SIZEOF_VOID_P == 4
70 typedef guint32 mword
;
72 typedef guint64 mword
;
75 #define SGEN_TV_DECLARE(name) gint64 name
76 #define SGEN_TV_GETTIME(tv) tv = mono_100ns_ticks ()
77 #define SGEN_TV_ELAPSED(start,end) (int)((end-start) / 10)
78 #define SGEN_TV_ELAPSED_MS(start,end) ((SGEN_TV_ELAPSED((start),(end)) + 500) / 1000)
80 /* for use with write barriers */
81 typedef struct _RememberedSet RememberedSet
;
82 struct _RememberedSet
{
86 mword data
[MONO_ZERO_LEN_ARRAY
];
89 /* eventually share with MonoThread? */
90 typedef struct _SgenThreadInfo SgenThreadInfo
;
92 struct _SgenThreadInfo
{
96 thread_port_t mach_port
;
99 #if defined(PLATFORM_ANDROID)
103 unsigned int stop_count
; /* to catch duplicate signals */
106 volatile int in_critical_region
;
107 gboolean gc_disabled
;
110 void *stack_start_limit
;
111 char **tlab_next_addr
;
112 char **tlab_start_addr
;
113 char **tlab_temp_end_addr
;
114 char **tlab_real_end_addr
;
115 gpointer
**store_remset_buffer_addr
;
116 long *store_remset_buffer_index_addr
;
117 RememberedSet
*remset
;
118 gpointer runtime_data
;
119 gpointer stopped_ip
; /* only valid if the thread is stopped */
120 MonoDomain
*stopped_domain
; /* ditto */
122 #if defined(__MACH__)
123 gpointer regs
[ARCH_NUM_REGS
]; /* ditto */
126 gpointer
*stopped_regs
; /* ditto */
127 #ifndef HAVE_KW_THREAD
132 gpointer
*store_remset_buffer
;
133 long store_remset_buffer_index
;
144 typedef struct _SgenBlock SgenBlock
;
151 * The nursery section and the major copying collector's sections use
154 typedef struct _GCMemSection GCMemSection
;
155 struct _GCMemSection
{
159 /* pointer where more data could be allocated if it fits */
163 * scan starts is an array of pointers to objects equally spaced in the allocation area
164 * They let use quickly find pinned objects from pinning pointers.
167 /* in major collections indexes in the pin_queue for objects that pin this section */
168 void **pin_queue_start
;
169 int pin_queue_num_entries
;
170 unsigned short num_scan_start
;
171 gboolean is_to_space
;
174 #define SGEN_SIZEOF_GC_MEM_SECTION ((sizeof (GCMemSection) + 7) & ~7)
177 * to quickly find the head of an object pinned by a conservative
178 * address we keep track of the objects allocated for each
179 * SGEN_SCAN_START_SIZE memory chunk in the nursery or other memory
180 * sections. Larger values have less memory overhead and bigger
181 * runtime cost. 4-8 KB are reasonable values.
183 #define SGEN_SCAN_START_SIZE (4096*2)
186 * Objects bigger then this go into the large object space. This size
187 * has a few constraints. It must fit into the major heap, which in
188 * the case of the copying collector means that it must fit into a
189 * pinned chunk. It must also play well with the GC descriptors, some
190 * of which (DESC_TYPE_RUN_LENGTH, DESC_TYPE_SMALL_BITMAP) encode the
193 #define SGEN_MAX_SMALL_OBJ_SIZE 8000
195 /* This is also the MAJOR_SECTION_SIZE for the copying major
197 #define SGEN_PINNED_CHUNK_SIZE (128 * 1024)
199 #define SGEN_PINNED_CHUNK_FOR_PTR(o) ((SgenBlock*)(((mword)(o)) & ~(SGEN_PINNED_CHUNK_SIZE - 1)))
201 typedef struct _SgenPinnedChunk SgenPinnedChunk
;
203 #if defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__)
204 const static int suspend_signal_num
= SIGXFSZ
;
206 const static int suspend_signal_num
= SIGPWR
;
208 const static int restart_signal_num
= SIGXCPU
;
211 * Recursion is not allowed for the thread lock.
213 #define LOCK_DECLARE(name) pthread_mutex_t name = PTHREAD_MUTEX_INITIALIZER
214 /* if changing LOCK_INIT to something that isn't idempotent, look at
215 its use in mono_gc_base_init in sgen-gc.c */
216 #define LOCK_INIT(name)
217 #define LOCK_GC pthread_mutex_lock (&gc_mutex)
218 #define UNLOCK_GC pthread_mutex_unlock (&gc_mutex)
219 #define LOCK_INTERRUPTION pthread_mutex_lock (&interruption_mutex)
220 #define UNLOCK_INTERRUPTION pthread_mutex_unlock (&interruption_mutex)
222 #define SGEN_CAS_PTR InterlockedCompareExchangePointer
223 #define SGEN_ATOMIC_ADD(x,i) do { \
227 } while (InterlockedCompareExchange (&(x), __old_x + (i), __old_x) != __old_x); \
230 /* non-pthread will need to provide their own version of start/stop */
231 #define USE_SIGNAL_BASED_START_STOP_WORLD 1
232 /* we intercept pthread_create calls to know which threads exist */
233 #define USE_PTHREAD_INTERCEPT 1
235 #ifdef HEAVY_STATISTICS
236 #define HEAVY_STAT(x) x
238 extern long long stat_objects_alloced_degraded
;
239 extern long long stat_bytes_alloced_degraded
;
240 extern long long stat_copy_object_called_major
;
241 extern long long stat_objects_copied_major
;
243 #define HEAVY_STAT(x)
246 #define DEBUG(level,a) do {if (G_UNLIKELY ((level) <= SGEN_MAX_DEBUG_LEVEL && (level) <= gc_debug_level)) a;} while (0)
248 extern int gc_debug_level
;
249 extern FILE* gc_debug_file
;
251 extern int current_collection_generation
;
253 extern gboolean conservative_stack_mark
;
255 #define SGEN_ALLOC_ALIGN 8
256 #define SGEN_ALLOC_ALIGN_BITS 3
258 #define SGEN_ALIGN_UP(s) (((s)+(SGEN_ALLOC_ALIGN-1)) & ~(SGEN_ALLOC_ALIGN-1))
260 #ifdef SGEN_ALIGN_NURSERY
261 #define SGEN_PTR_IN_NURSERY(p,bits,start,end) (((mword)(p) & ~((1 << (bits)) - 1)) == (mword)(start))
263 #define SGEN_PTR_IN_NURSERY(p,bits,start,end) ((char*)(p) >= (start) && (char*)(p) < (end))
266 /* Structure that corresponds to a MonoVTable: desc is a mword so requires
267 * no cast from a pointer to an integer
274 /* these bits are set in the object vtable: we could merge them since an object can be
275 * either pinned or forwarded but not both.
276 * We store them in the vtable slot because the bits are used in the sync block for
277 * other purposes: if we merge them and alloc the sync blocks aligned to 8 bytes, we can change
278 * this and use bit 3 in the syncblock (with the lower two bits both set for forwarded, that
279 * would be an invalid combination for the monitor and hash code).
280 * The values are already shifted.
281 * The forwarding address is stored in the sync block.
283 #define SGEN_FORWARDED_BIT 1
284 #define SGEN_PINNED_BIT 2
285 #define SGEN_VTABLE_BITS_MASK 0x3
287 /* returns NULL if not forwarded, or the forwarded address */
288 #define SGEN_OBJECT_IS_FORWARDED(obj) (((mword*)(obj))[0] & SGEN_FORWARDED_BIT ? (void*)(((mword*)(obj))[0] & ~SGEN_VTABLE_BITS_MASK) : NULL)
289 #define SGEN_OBJECT_IS_PINNED(obj) (((mword*)(obj))[0] & SGEN_PINNED_BIT)
291 /* set the forwarded address fw_addr for object obj */
292 #define SGEN_FORWARD_OBJECT(obj,fw_addr) do { \
293 ((mword*)(obj))[0] = (mword)(fw_addr) | SGEN_FORWARDED_BIT; \
295 #define SGEN_PIN_OBJECT(obj) do { \
296 ((mword*)(obj))[0] |= SGEN_PINNED_BIT; \
298 #define SGEN_UNPIN_OBJECT(obj) do { \
299 ((mword*)(obj))[0] &= ~SGEN_PINNED_BIT; \
303 * Since we set bits in the vtable, use the macro to load it from the pointer to
304 * an object that is potentially pinned.
306 #define SGEN_LOAD_VTABLE(addr) ((*(mword*)(addr)) & ~SGEN_VTABLE_BITS_MASK)
309 * ######################################################################
310 * ######## GC descriptors
311 * ######################################################################
312 * Used to quickly get the info the GC needs about an object: size and
313 * where the references are held.
315 #define OBJECT_HEADER_WORDS (sizeof(MonoObject)/sizeof(gpointer))
316 #define LOW_TYPE_BITS 3
317 #define SMALL_BITMAP_SHIFT 16
318 #define SMALL_BITMAP_SIZE (GC_BITS_PER_WORD - SMALL_BITMAP_SHIFT)
319 #define VECTOR_INFO_SHIFT 14
320 #define VECTOR_ELSIZE_SHIFT 3
321 #define LARGE_BITMAP_SIZE (GC_BITS_PER_WORD - LOW_TYPE_BITS)
322 #define MAX_ELEMENT_SIZE 0x3ff
323 #define VECTOR_SUBTYPE_PTRFREE (DESC_TYPE_V_PTRFREE << VECTOR_INFO_SHIFT)
324 #define VECTOR_SUBTYPE_REFS (DESC_TYPE_V_REFS << VECTOR_INFO_SHIFT)
325 #define VECTOR_SUBTYPE_RUN_LEN (DESC_TYPE_V_RUN_LEN << VECTOR_INFO_SHIFT)
326 #define VECTOR_SUBTYPE_BITMAP (DESC_TYPE_V_BITMAP << VECTOR_INFO_SHIFT)
328 /* objects are aligned to 8 bytes boundaries
329 * A descriptor is a pointer in MonoVTable, so 32 or 64 bits of size.
330 * The low 3 bits define the type of the descriptor. The other bits
331 * depend on the type.
332 * As a general rule the 13 remaining low bits define the size, either
333 * of the whole object or of the elements in the arrays. While for objects
334 * the size is already in bytes, for arrays we need to shift, because
335 * array elements might be smaller than 8 bytes. In case of arrays, we
336 * use two bits to describe what the additional high bits represents,
337 * so the default behaviour can handle element sizes less than 2048 bytes.
338 * The high 16 bits, if 0 it means the object is pointer-free.
339 * This design should make it easy and fast to skip over ptr-free data.
340 * The first 4 types should cover >95% of the objects.
341 * Note that since the size of objects is limited to 64K, larger objects
342 * will be allocated in the large object heap.
343 * If we want 4-bytes alignment, we need to put vector and small bitmap
348 * We don't use 0 so that 0 isn't a valid GC descriptor. No
349 * deep reason for this other than to be able to identify a
350 * non-inited descriptor for debugging.
352 * If an object contains no references, its GC descriptor is
353 * always DESC_TYPE_RUN_LENGTH, without a size, no exceptions.
354 * This is so that we can quickly check for that in
355 * copy_object_no_checks(), without having to fetch the
358 DESC_TYPE_RUN_LENGTH
= 1, /* 15 bits aligned byte size | 1-3 (offset, numptr) bytes tuples */
359 DESC_TYPE_SMALL_BITMAP
, /* 15 bits aligned byte size | 16-48 bit bitmap */
360 DESC_TYPE_COMPLEX
, /* index for bitmap into complex_descriptors */
361 DESC_TYPE_VECTOR
, /* 10 bits element size | 1 bit array | 2 bits desc | element desc */
362 DESC_TYPE_ARRAY
, /* 10 bits element size | 1 bit array | 2 bits desc | element desc */
363 DESC_TYPE_LARGE_BITMAP
, /* | 29-61 bitmap bits */
364 DESC_TYPE_COMPLEX_ARR
, /* index for bitmap into complex_descriptors */
365 /* subtypes for arrays and vectors */
366 DESC_TYPE_V_PTRFREE
= 0,/* there are no refs: keep first so it has a zero value */
367 DESC_TYPE_V_REFS
, /* all the array elements are refs */
368 DESC_TYPE_V_RUN_LEN
, /* elements are run-length encoded as DESC_TYPE_RUN_LENGTH */
369 DESC_TYPE_V_BITMAP
/* elements are as the bitmap in DESC_TYPE_SMALL_BITMAP */
372 #define SGEN_VTABLE_HAS_REFERENCES(vt) (((MonoVTable*)(vt))->gc_descr != (void*)DESC_TYPE_RUN_LENGTH)
373 #define SGEN_CLASS_HAS_REFERENCES(c) ((c)->gc_descr != (void*)DESC_TYPE_RUN_LENGTH)
375 /* helper macros to scan and traverse objects, macros because we resue them in many functions */
376 #define OBJ_RUN_LEN_SIZE(size,desc,obj) do { \
377 (size) = ((desc) & 0xfff8) >> 1; \
380 #define OBJ_BITMAP_SIZE(size,desc,obj) do { \
381 (size) = ((desc) & 0xfff8) >> 1; \
384 //#define PREFETCH(addr) __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(addr)))
385 #define PREFETCH(addr)
387 /* code using these macros must define a HANDLE_PTR(ptr) macro that does the work */
388 #define OBJ_RUN_LEN_FOREACH_PTR(desc,obj) do { \
389 if ((desc) & 0xffff0000) { \
390 /* there are pointers */ \
391 void **_objptr_end; \
392 void **_objptr = (void**)(obj); \
393 _objptr += ((desc) >> 16) & 0xff; \
394 _objptr_end = _objptr + (((desc) >> 24) & 0xff); \
395 while (_objptr < _objptr_end) { \
396 HANDLE_PTR (_objptr, (obj)); \
402 /* a bitmap desc means that there are pointer references or we'd have
403 * choosen run-length, instead: add an assert to check.
405 #define OBJ_BITMAP_FOREACH_PTR(desc,obj) do { \
406 /* there are pointers */ \
407 void **_objptr = (void**)(obj); \
408 gsize _bmap = (desc) >> 16; \
409 _objptr += OBJECT_HEADER_WORDS; \
412 HANDLE_PTR (_objptr, (obj)); \
419 #define OBJ_LARGE_BITMAP_FOREACH_PTR(desc,obj) do { \
420 /* there are pointers */ \
421 void **_objptr = (void**)(obj); \
422 gsize _bmap = (desc) >> LOW_TYPE_BITS; \
423 _objptr += OBJECT_HEADER_WORDS; \
426 HANDLE_PTR (_objptr, (obj)); \
433 gsize
* mono_sgen_get_complex_descriptor (mword desc
) MONO_INTERNAL
;
435 #define OBJ_COMPLEX_FOREACH_PTR(desc,obj) do { \
436 /* there are pointers */ \
437 void **_objptr = (void**)(obj); \
438 gsize *bitmap_data = mono_sgen_get_complex_descriptor (desc); \
439 int bwords = (*bitmap_data) - 1; \
440 void **start_run = _objptr; \
443 MonoObject *myobj = (MonoObject*)obj; \
444 g_print ("found %d at %p (0x%zx): %s.%s\n", bwords, (obj), desc, myobj->vtable->klass->name_space, myobj->vtable->klass->name); \
446 while (bwords-- > 0) { \
447 gsize _bmap = *bitmap_data++; \
448 _objptr = start_run; \
449 /*g_print ("bitmap: 0x%x/%d at %p\n", _bmap, bwords, _objptr);*/ \
452 HANDLE_PTR (_objptr, (obj)); \
457 start_run += GC_BITS_PER_WORD; \
461 /* this one is untested */
462 #define OBJ_COMPLEX_ARR_FOREACH_PTR(vt,obj) do { \
463 /* there are pointers */ \
464 gsize *mbitmap_data = mono_sgen_get_complex_descriptor ((vt)->desc); \
465 int mbwords = (*mbitmap_data++) - 1; \
466 int el_size = mono_array_element_size (vt->klass); \
467 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
468 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
470 g_print ("found %d at %p (0x%zx): %s.%s\n", mbwords, (obj), (vt)->desc, vt->klass->name_space, vt->klass->name); \
471 while (e_start < e_end) { \
472 void **_objptr = (void**)e_start; \
473 gsize *bitmap_data = mbitmap_data; \
474 unsigned int bwords = mbwords; \
475 while (bwords-- > 0) { \
476 gsize _bmap = *bitmap_data++; \
477 void **start_run = _objptr; \
478 /*g_print ("bitmap: 0x%x\n", _bmap);*/ \
481 HANDLE_PTR (_objptr, (obj)); \
486 _objptr = start_run + GC_BITS_PER_WORD; \
488 e_start += el_size; \
492 #define OBJ_VECTOR_FOREACH_PTR(vt,obj) do { \
493 /* note: 0xffffc000 excludes DESC_TYPE_V_PTRFREE */ \
494 if ((vt)->desc & 0xffffc000) { \
495 int el_size = ((vt)->desc >> 3) & MAX_ELEMENT_SIZE; \
496 /* there are pointers */ \
497 int etype = (vt)->desc & 0xc000; \
498 if (etype == (DESC_TYPE_V_REFS << 14)) { \
499 void **p = (void**)((char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector)); \
500 void **end_refs = (void**)((char*)p + el_size * mono_array_length_fast ((MonoArray*)(obj))); \
501 /* Note: this code can handle also arrays of struct with only references in them */ \
502 while (p < end_refs) { \
503 HANDLE_PTR (p, (obj)); \
506 } else if (etype == DESC_TYPE_V_RUN_LEN << 14) { \
507 int offset = ((vt)->desc >> 16) & 0xff; \
508 int num_refs = ((vt)->desc >> 24) & 0xff; \
509 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
510 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
511 while (e_start < e_end) { \
512 void **p = (void**)e_start; \
515 for (i = 0; i < num_refs; ++i) { \
516 HANDLE_PTR (p + i, (obj)); \
518 e_start += el_size; \
520 } else if (etype == DESC_TYPE_V_BITMAP << 14) { \
521 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
522 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
523 while (e_start < e_end) { \
524 void **p = (void**)e_start; \
525 gsize _bmap = (vt)->desc >> 16; \
526 /* Note: there is no object header here to skip */ \
529 HANDLE_PTR (p, (obj)); \
534 e_start += el_size; \
540 typedef struct _SgenInternalAllocator SgenInternalAllocator
;
542 #define SGEN_GRAY_QUEUE_SECTION_SIZE (128 - 3)
545 * This is a stack now instead of a queue, so the most recently added items are removed
546 * first, improving cache locality, and keeping the stack size manageable.
548 typedef struct _GrayQueueSection GrayQueueSection
;
549 struct _GrayQueueSection
{
551 GrayQueueSection
*next
;
552 char *objects
[SGEN_GRAY_QUEUE_SECTION_SIZE
];
555 typedef struct _SgenGrayQueue SgenGrayQueue
;
557 typedef void (*GrayQueueAllocPrepareFunc
) (SgenGrayQueue
*);
559 struct _SgenGrayQueue
{
560 SgenInternalAllocator
*allocator
;
561 GrayQueueSection
*first
;
562 GrayQueueSection
*free_list
;
564 GrayQueueAllocPrepareFunc alloc_prepare_func
;
565 void *alloc_prepare_data
;
568 #if SGEN_MAX_DEBUG_LEVEL >= 9
569 #define GRAY_OBJECT_ENQUEUE gray_object_enqueue
570 #define GRAY_OBJECT_DEQUEUE(queue,o) ((o) = gray_object_dequeue ((queue)))
572 #define GRAY_OBJECT_ENQUEUE(queue,o) do { \
573 if (G_UNLIKELY (!(queue)->first || (queue)->first->end == SGEN_GRAY_QUEUE_SECTION_SIZE)) \
574 mono_sgen_gray_object_enqueue ((queue), (o)); \
576 (queue)->first->objects [(queue)->first->end++] = (o); \
578 #define GRAY_OBJECT_DEQUEUE(queue,o) do { \
579 if (!(queue)->first) \
581 else if (G_UNLIKELY ((queue)->first->end == 1)) \
582 (o) = mono_sgen_gray_object_dequeue ((queue)); \
584 (o) = (queue)->first->objects [--(queue)->first->end]; \
588 void mono_sgen_gray_object_enqueue (SgenGrayQueue
*queue
, char *obj
) MONO_INTERNAL
;
589 char* mono_sgen_gray_object_dequeue (SgenGrayQueue
*queue
) MONO_INTERNAL
;
592 List of what each bit on of the vtable gc bits means.
595 SGEN_GC_BIT_BRIDGE_OBJECT
= 1,
598 typedef void (*IterateObjectCallbackFunc
) (char*, size_t, void*);
600 void* mono_sgen_alloc_os_memory (size_t size
, int activate
) MONO_INTERNAL
;
601 void* mono_sgen_alloc_os_memory_aligned (mword size
, mword alignment
, gboolean activate
) MONO_INTERNAL
;
602 void mono_sgen_free_os_memory (void *addr
, size_t size
) MONO_INTERNAL
;
604 int mono_sgen_thread_handshake (int signum
) MONO_INTERNAL
;
605 SgenThreadInfo
* mono_sgen_thread_info_lookup (ARCH_THREAD_TYPE id
) MONO_INTERNAL
;
606 SgenThreadInfo
** mono_sgen_get_thread_table (void) MONO_INTERNAL
;
607 gboolean
mono_sgen_suspend_thread (SgenThreadInfo
*info
) MONO_INTERNAL
;
608 int mono_sgen_pthread_kill (SgenThreadInfo
*info
, int signum
) MONO_INTERNAL
;
611 void mono_sgen_wait_for_suspend_ack (int count
) MONO_INTERNAL
;
613 gboolean
mono_sgen_is_worker_thread (pthread_t thread
) MONO_INTERNAL
;
615 void mono_sgen_update_heap_boundaries (mword low
, mword high
) MONO_INTERNAL
;
617 void mono_sgen_register_major_sections_alloced (int num_sections
) MONO_INTERNAL
;
618 mword
mono_sgen_get_minor_collection_allowance (void) MONO_INTERNAL
;
620 void mono_sgen_scan_area_with_callback (char *start
, char *end
, IterateObjectCallbackFunc callback
, void *data
, gboolean allow_flags
) MONO_INTERNAL
;
621 void mono_sgen_check_section_scan_starts (GCMemSection
*section
) MONO_INTERNAL
;
623 /* Keep in sync with mono_sgen_dump_internal_mem_usage() in dump_heap()! */
625 INTERNAL_MEM_MANAGED
,
626 INTERNAL_MEM_PIN_QUEUE
,
627 INTERNAL_MEM_FRAGMENT
,
628 INTERNAL_MEM_SECTION
,
629 INTERNAL_MEM_SCAN_STARTS
,
630 INTERNAL_MEM_FIN_TABLE
,
631 INTERNAL_MEM_FINALIZE_ENTRY
,
632 INTERNAL_MEM_DISLINK_TABLE
,
633 INTERNAL_MEM_DISLINK
,
634 INTERNAL_MEM_ROOTS_TABLE
,
635 INTERNAL_MEM_ROOT_RECORD
,
636 INTERNAL_MEM_STATISTICS
,
638 INTERNAL_MEM_GRAY_QUEUE
,
639 INTERNAL_MEM_STORE_REMSET
,
640 INTERNAL_MEM_MS_TABLES
,
641 INTERNAL_MEM_MS_BLOCK_INFO
,
642 INTERNAL_MEM_EPHEMERON_LINK
,
643 INTERNAL_MEM_WORKER_DATA
,
644 INTERNAL_MEM_BRIDGE_DATA
,
645 INTERNAL_MEM_TOGGLEREF_DATA
,
649 #define SGEN_INTERNAL_FREELIST_NUM_SLOTS 30
651 struct _SgenInternalAllocator
{
652 SgenPinnedChunk
*chunk_list
;
653 SgenPinnedChunk
*free_lists
[SGEN_INTERNAL_FREELIST_NUM_SLOTS
];
654 void *delayed_free_lists
[SGEN_INTERNAL_FREELIST_NUM_SLOTS
];
655 long small_internal_mem_bytes
[INTERNAL_MEM_MAX
];
664 void mono_sgen_init_internal_allocator (void) MONO_INTERNAL
;
666 SgenInternalAllocator
* mono_sgen_get_unmanaged_allocator (void) MONO_INTERNAL
;
668 const char* mono_sgen_internal_mem_type_name (int type
) MONO_INTERNAL
;
669 void mono_sgen_report_internal_mem_usage (void) MONO_INTERNAL
;
670 void mono_sgen_report_internal_mem_usage_full (SgenInternalAllocator
*alc
) MONO_INTERNAL
;
671 void mono_sgen_dump_internal_mem_usage (FILE *heap_dump_file
) MONO_INTERNAL
;
672 void mono_sgen_dump_section (GCMemSection
*section
, const char *type
) MONO_INTERNAL
;
673 void mono_sgen_dump_occupied (char *start
, char *end
, char *section_start
) MONO_INTERNAL
;
675 void mono_sgen_register_moved_object (void *obj
, void *destination
) MONO_INTERNAL
;
677 void mono_sgen_register_fixed_internal_mem_type (int type
, size_t size
) MONO_INTERNAL
;
679 void* mono_sgen_alloc_internal (int type
) MONO_INTERNAL
;
680 void mono_sgen_free_internal (void *addr
, int type
) MONO_INTERNAL
;
682 void* mono_sgen_alloc_internal_dynamic (size_t size
, int type
) MONO_INTERNAL
;
683 void mono_sgen_free_internal_dynamic (void *addr
, size_t size
, int type
) MONO_INTERNAL
;
685 void* mono_sgen_alloc_internal_fixed (SgenInternalAllocator
*allocator
, int type
) MONO_INTERNAL
;
686 void mono_sgen_free_internal_fixed (SgenInternalAllocator
*allocator
, void *addr
, int type
) MONO_INTERNAL
;
688 void* mono_sgen_alloc_internal_full (SgenInternalAllocator
*allocator
, size_t size
, int type
) MONO_INTERNAL
;
689 void mono_sgen_free_internal_full (SgenInternalAllocator
*allocator
, void *addr
, size_t size
, int type
) MONO_INTERNAL
;
691 void mono_sgen_free_internal_delayed (void *addr
, int type
, SgenInternalAllocator
*thread_allocator
) MONO_INTERNAL
;
693 void mono_sgen_debug_printf (int level
, const char *format
, ...) MONO_INTERNAL
;
695 gboolean
mono_sgen_parse_environment_string_extract_number (const char *str
, glong
*out
) MONO_INTERNAL
;
697 void mono_sgen_internal_scan_objects (SgenInternalAllocator
*alc
, IterateObjectCallbackFunc callback
, void *callback_data
) MONO_INTERNAL
;
698 void mono_sgen_internal_scan_pinned_objects (SgenInternalAllocator
*alc
, IterateObjectCallbackFunc callback
, void *callback_data
) MONO_INTERNAL
;
700 void mono_sgen_internal_update_heap_boundaries (SgenInternalAllocator
*alc
) MONO_INTERNAL
;
702 void** mono_sgen_find_optimized_pin_queue_area (void *start
, void *end
, int *num
) MONO_INTERNAL
;
703 void mono_sgen_find_section_pin_queue_start_end (GCMemSection
*section
) MONO_INTERNAL
;
704 void mono_sgen_pin_objects_in_section (GCMemSection
*section
, SgenGrayQueue
*queue
) MONO_INTERNAL
;
706 void mono_sgen_pin_stats_register_object (char *obj
, size_t size
);
708 void mono_sgen_add_to_global_remset (gpointer ptr
) MONO_INTERNAL
;
710 int mono_sgen_get_current_collection_generation (void) MONO_INTERNAL
;
712 typedef void (*sgen_cardtable_block_callback
) (mword start
, mword size
);
714 typedef struct _SgenMajorCollector SgenMajorCollector
;
715 struct _SgenMajorCollector
{
717 gboolean is_parallel
;
718 gboolean supports_cardtable
;
721 * This is set to TRUE if the sweep for the last major
722 * collection has been completed.
724 gboolean
*have_swept
;
726 void* (*alloc_heap
) (mword nursery_size
, mword nursery_align
, int nursery_bits
);
727 gboolean (*is_object_live
) (char *obj
);
728 void* (*alloc_small_pinned_obj
) (size_t size
, gboolean has_references
);
729 void* (*alloc_degraded
) (MonoVTable
*vtable
, size_t size
);
730 void (*copy_or_mark_object
) (void **obj_slot
, SgenGrayQueue
*queue
);
731 void (*minor_scan_object
) (char *start
, SgenGrayQueue
*queue
);
732 char* (*minor_scan_vtype
) (char *start
, MonoClass
*klass
, char* from_start
, char* from_end
, SgenGrayQueue
*queue
);
733 void (*major_scan_object
) (char *start
, SgenGrayQueue
*queue
);
734 void (*copy_object
) (void **obj_slot
, SgenGrayQueue
*queue
);
735 void* (*alloc_object
) (int size
, gboolean has_references
);
736 void (*free_pinned_object
) (char *obj
, size_t size
);
737 void (*iterate_objects
) (gboolean non_pinned
, gboolean pinned
, IterateObjectCallbackFunc callback
, void *data
);
738 void (*free_non_pinned_object
) (char *obj
, size_t size
);
739 void (*find_pin_queue_start_ends
) (SgenGrayQueue
*queue
);
740 void (*pin_objects
) (SgenGrayQueue
*queue
);
741 void (*scan_card_table
) (SgenGrayQueue
*queue
);
742 void (*iterate_live_block_ranges
) (sgen_cardtable_block_callback callback
);
743 void (*init_to_space
) (void);
744 void (*sweep
) (void);
745 void (*check_scan_starts
) (void);
746 void (*dump_heap
) (FILE *heap_dump_file
);
747 gint64 (*get_used_size
) (void);
748 void (*start_nursery_collection
) (void);
749 void (*finish_nursery_collection
) (void);
750 void (*start_major_collection
) (void);
751 void (*finish_major_collection
) (void);
752 void (*have_computed_minor_collection_allowance
) (void);
753 gboolean (*ptr_is_in_non_pinned_space
) (char *ptr
);
754 gboolean (*obj_is_from_pinned_alloc
) (char *obj
);
755 void (*report_pinned_memory_usage
) (void);
756 int (*get_num_major_sections
) (void);
757 gboolean (*handle_gc_param
) (const char *opt
);
758 void (*print_gc_param_usage
) (void);
759 gboolean (*is_worker_thread
) (pthread_t thread
);
762 void mono_sgen_marksweep_init (SgenMajorCollector
*collector
) MONO_INTERNAL
;
763 void mono_sgen_marksweep_fixed_init (SgenMajorCollector
*collector
) MONO_INTERNAL
;
764 void mono_sgen_marksweep_par_init (SgenMajorCollector
*collector
) MONO_INTERNAL
;
765 void mono_sgen_marksweep_fixed_par_init (SgenMajorCollector
*collector
) MONO_INTERNAL
;
766 void mono_sgen_copying_init (SgenMajorCollector
*collector
) MONO_INTERNAL
;
769 * This function can be called on an object whose first word, the
770 * vtable field, is not intact. This is necessary for the parallel
774 mono_sgen_par_object_get_size (MonoVTable
*vtable
, MonoObject
* o
)
776 MonoClass
*klass
= vtable
->klass
;
778 * We depend on mono_string_length_fast and
779 * mono_array_length_fast not using the object's vtable.
781 if (klass
== mono_defaults
.string_class
) {
782 return sizeof (MonoString
) + 2 * mono_string_length_fast ((MonoString
*) o
) + 2;
783 } else if (klass
->rank
) {
784 MonoArray
*array
= (MonoArray
*)o
;
785 size_t size
= sizeof (MonoArray
) + klass
->sizes
.element_size
* mono_array_length_fast (array
);
786 if (G_UNLIKELY (array
->bounds
)) {
787 size
+= sizeof (mono_array_size_t
) - 1;
788 size
&= ~(sizeof (mono_array_size_t
) - 1);
789 size
+= sizeof (MonoArrayBounds
) * klass
->rank
;
793 /* from a created object: the class must be inited already */
794 return klass
->instance_size
;
799 mono_sgen_safe_object_get_size (MonoObject
*obj
)
803 if ((forwarded
= SGEN_OBJECT_IS_FORWARDED (obj
)))
804 obj
= (MonoObject
*)forwarded
;
806 return mono_sgen_par_object_get_size ((MonoVTable
*)SGEN_LOAD_VTABLE (obj
), obj
);
809 const char* mono_sgen_safe_name (void* obj
) MONO_INTERNAL
;
811 gboolean
mono_sgen_object_is_live (void *obj
) MONO_INTERNAL
;
813 gboolean
mono_sgen_need_bridge_processing (void) MONO_INTERNAL
;
814 void mono_sgen_bridge_processing_register_objects (int num_objs
, MonoObject
**objs
) MONO_INTERNAL
;
815 void mono_sgen_bridge_reset_data (void) MONO_INTERNAL
;
816 void mono_sgen_bridge_processing_stw_step (void) MONO_INTERNAL
;
817 void mono_sgen_bridge_processing_finish (void) MONO_INTERNAL
;
818 void mono_sgen_register_test_bridge_callbacks (void) MONO_INTERNAL
;
819 gboolean
mono_sgen_is_bridge_object (MonoObject
*obj
) MONO_INTERNAL
;
820 gboolean
mono_sgen_is_bridge_class (MonoClass
*class) MONO_INTERNAL
;
821 void mono_sgen_mark_bridge_object (MonoObject
*obj
) MONO_INTERNAL
;
823 typedef void (*CopyOrMarkObjectFunc
) (void**, SgenGrayQueue
*);
824 void mono_sgen_scan_togglerefs (CopyOrMarkObjectFunc copy_func
, char *start
, char *end
, SgenGrayQueue
*queue
) MONO_INTERNAL
;
825 void mono_sgen_process_togglerefs (void) MONO_INTERNAL
;
828 gboolean
mono_sgen_gc_is_object_ready_for_finalization (void *object
) MONO_INTERNAL
;
829 void mono_sgen_gc_lock (void) MONO_INTERNAL
;
830 void mono_sgen_gc_unlock (void) MONO_INTERNAL
;
837 gboolean
mono_sgen_try_alloc_space (mword size
, int space
) MONO_INTERNAL
;
838 void mono_sgen_release_space (mword size
, int space
) MONO_INTERNAL
;
839 void mono_sgen_pin_object (void *object
, SgenGrayQueue
*queue
) MONO_INTERNAL
;
840 void sgen_collect_major_no_lock (const char *reason
) MONO_INTERNAL
;
841 gboolean
mono_sgen_need_major_collection (mword space_needed
) MONO_INTERNAL
;
845 typedef struct _LOSObject LOSObject
;
848 mword size
; /* this is the object size */
850 int dummy
; /* to have a sizeof (LOSObject) a multiple of ALLOC_ALIGN and data starting at same alignment */
851 char data
[MONO_ZERO_LEN_ARRAY
];
854 #define ARRAY_OBJ_INDEX(ptr,array,elem_size) (((char*)(ptr) - ((char*)(array) + G_STRUCT_OFFSET (MonoArray, vector))) / (elem_size))
856 extern LOSObject
*los_object_list
;
857 extern mword los_memory_usage
;
859 void mono_sgen_los_free_object (LOSObject
*obj
) MONO_INTERNAL
;
860 void* mono_sgen_los_alloc_large_inner (MonoVTable
*vtable
, size_t size
) MONO_INTERNAL
;
861 void mono_sgen_los_sweep (void) MONO_INTERNAL
;
862 gboolean
mono_sgen_ptr_is_in_los (char *ptr
, char **start
) MONO_INTERNAL
;
863 void mono_sgen_los_iterate_objects (IterateObjectCallbackFunc cb
, void *user_data
) MONO_INTERNAL
;
864 void mono_sgen_los_iterate_live_block_ranges (sgen_cardtable_block_callback callback
) MONO_INTERNAL
;
865 void mono_sgen_los_scan_card_table (SgenGrayQueue
*queue
) MONO_INTERNAL
;
866 FILE *mono_sgen_get_logfile (void) MONO_INTERNAL
;
868 #endif /* HAVE_SGEN_GC */
870 #endif /* __MONO_SGENGC_H__ */