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 typedef struct _SgenThreadInfo SgenThreadInfo;
33 #define THREAD_INFO_TYPE SgenThreadInfo
38 #include <mono/utils/mono-compiler.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/metadata/class-internals.h>
41 #include <mono/metadata/object-internals.h>
42 #include <mono/metadata/sgen-archdep.h>
44 #include <mach/mach_port.h>
48 * Turning on heavy statistics will turn off the managed allocator and
49 * the managed write barrier.
51 //#define HEAVY_STATISTICS
54 * If this is set, the nursery is aligned to an address aligned to its size, ie.
55 * a 1MB nursery will be aligned to an address divisible by 1MB. This allows us to
56 * speed up ptr_in_nursery () checks which are very frequent. This requires the
57 * nursery size to be a compile time constant.
59 #define SGEN_ALIGN_NURSERY 1
61 //#define SGEN_BINARY_PROTOCOL
63 #define SGEN_MAX_DEBUG_LEVEL 2
65 #define GC_BITS_PER_WORD (sizeof (mword) * 8)
68 #if SIZEOF_VOID_P == 4
69 typedef guint32 mword;
71 typedef guint64 mword;
74 #define SGEN_TV_DECLARE(name) gint64 name
75 #define SGEN_TV_GETTIME(tv) tv = mono_100ns_ticks ()
76 #define SGEN_TV_ELAPSED(start,end) (int)((end-start) / 10)
77 #define SGEN_TV_ELAPSED_MS(start,end) ((SGEN_TV_ELAPSED((start),(end)) + 500) / 1000)
79 /* for use with write barriers */
80 typedef struct _RememberedSet RememberedSet;
81 struct _RememberedSet {
85 mword data [MONO_ZERO_LEN_ARRAY];
88 /* eventually share with MonoThread? */
89 struct _SgenThreadInfo {
92 thread_port_t mach_port;
95 unsigned int stop_count; /* to catch duplicate signals */
98 volatile int in_critical_region;
101 void *stack_start_limit;
102 char **tlab_next_addr;
103 char **tlab_start_addr;
104 char **tlab_temp_end_addr;
105 char **tlab_real_end_addr;
106 gpointer **store_remset_buffer_addr;
107 long *store_remset_buffer_index_addr;
108 RememberedSet *remset;
109 gpointer runtime_data;
110 gpointer stopped_ip; /* only valid if the thread is stopped */
111 MonoDomain *stopped_domain; /* ditto */
113 #if defined(__MACH__)
115 MonoContext ctx; /* ditto */
117 gpointer regs[ARCH_NUM_REGS]; /* ditto */
122 MonoContext *monoctx; /* ditto */
124 gpointer *stopped_regs; /* ditto */
126 #ifndef HAVE_KW_THREAD
131 gpointer *store_remset_buffer;
132 long store_remset_buffer_index;
142 typedef struct _SgenBlock SgenBlock;
149 * The nursery section and the major copying collector's sections use
152 typedef struct _GCMemSection GCMemSection;
153 struct _GCMemSection {
157 /* pointer where more data could be allocated if it fits */
161 * scan starts is an array of pointers to objects equally spaced in the allocation area
162 * They let use quickly find pinned objects from pinning pointers.
165 /* in major collections indexes in the pin_queue for objects that pin this section */
166 void **pin_queue_start;
167 int pin_queue_num_entries;
168 unsigned short num_scan_start;
169 gboolean is_to_space;
172 #define SGEN_SIZEOF_GC_MEM_SECTION ((sizeof (GCMemSection) + 7) & ~7)
175 * to quickly find the head of an object pinned by a conservative
176 * address we keep track of the objects allocated for each
177 * SGEN_SCAN_START_SIZE memory chunk in the nursery or other memory
178 * sections. Larger values have less memory overhead and bigger
179 * runtime cost. 4-8 KB are reasonable values.
181 #define SGEN_SCAN_START_SIZE (4096*2)
184 * Objects bigger then this go into the large object space. This size
185 * has a few constraints. It must fit into the major heap, which in
186 * the case of the copying collector means that it must fit into a
187 * pinned chunk. It must also play well with the GC descriptors, some
188 * of which (DESC_TYPE_RUN_LENGTH, DESC_TYPE_SMALL_BITMAP) encode the
191 #define SGEN_MAX_SMALL_OBJ_SIZE 8000
193 /* This is also the MAJOR_SECTION_SIZE for the copying major
195 #define SGEN_PINNED_CHUNK_SIZE (128 * 1024)
197 #define SGEN_PINNED_CHUNK_FOR_PTR(o) ((SgenBlock*)(((mword)(o)) & ~(SGEN_PINNED_CHUNK_SIZE - 1)))
199 typedef struct _SgenPinnedChunk SgenPinnedChunk;
201 #if defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__)
202 const static int suspend_signal_num = SIGXFSZ;
204 const static int suspend_signal_num = SIGPWR;
206 const static int restart_signal_num = SIGXCPU;
209 * Recursion is not allowed for the thread lock.
211 #define LOCK_DECLARE(name) pthread_mutex_t name = PTHREAD_MUTEX_INITIALIZER
212 /* if changing LOCK_INIT to something that isn't idempotent, look at
213 its use in mono_gc_base_init in sgen-gc.c */
214 #define LOCK_INIT(name)
215 #define LOCK_GC pthread_mutex_lock (&gc_mutex)
216 #define UNLOCK_GC pthread_mutex_unlock (&gc_mutex)
217 #define LOCK_INTERRUPTION pthread_mutex_lock (&interruption_mutex)
218 #define UNLOCK_INTERRUPTION pthread_mutex_unlock (&interruption_mutex)
220 #define SGEN_CAS_PTR InterlockedCompareExchangePointer
221 #define SGEN_ATOMIC_ADD(x,i) do { \
225 } while (InterlockedCompareExchange (&(x), __old_x + (i), __old_x) != __old_x); \
228 /* non-pthread will need to provide their own version of start/stop */
229 #define USE_SIGNAL_BASED_START_STOP_WORLD 1
230 /* we intercept pthread_create calls to know which threads exist */
231 #define USE_PTHREAD_INTERCEPT 1
233 #ifdef HEAVY_STATISTICS
234 #define HEAVY_STAT(x) x
236 extern long long stat_objects_alloced_degraded;
237 extern long long stat_bytes_alloced_degraded;
238 extern long long stat_copy_object_called_major;
239 extern long long stat_objects_copied_major;
241 #define HEAVY_STAT(x)
244 #define DEBUG(level,a) do {if (G_UNLIKELY ((level) <= SGEN_MAX_DEBUG_LEVEL && (level) <= gc_debug_level)) a;} while (0)
246 extern int gc_debug_level;
247 extern FILE* gc_debug_file;
249 extern int current_collection_generation;
251 #define SGEN_ALLOC_ALIGN 8
252 #define SGEN_ALLOC_ALIGN_BITS 3
254 #define SGEN_ALIGN_UP(s) (((s)+(SGEN_ALLOC_ALIGN-1)) & ~(SGEN_ALLOC_ALIGN-1))
256 #ifdef SGEN_ALIGN_NURSERY
257 #define SGEN_PTR_IN_NURSERY(p,bits,start,end) (((mword)(p) & ~((1 << (bits)) - 1)) == (mword)(start))
259 #define SGEN_PTR_IN_NURSERY(p,bits,start,end) ((char*)(p) >= (start) && (char*)(p) < (end))
262 /* Structure that corresponds to a MonoVTable: desc is a mword so requires
263 * no cast from a pointer to an integer
270 /* these bits are set in the object vtable: we could merge them since an object can be
271 * either pinned or forwarded but not both.
272 * We store them in the vtable slot because the bits are used in the sync block for
273 * other purposes: if we merge them and alloc the sync blocks aligned to 8 bytes, we can change
274 * this and use bit 3 in the syncblock (with the lower two bits both set for forwarded, that
275 * would be an invalid combination for the monitor and hash code).
276 * The values are already shifted.
277 * The forwarding address is stored in the sync block.
279 #define SGEN_FORWARDED_BIT 1
280 #define SGEN_PINNED_BIT 2
281 #define SGEN_VTABLE_BITS_MASK 0x3
283 /* returns NULL if not forwarded, or the forwarded address */
284 #define SGEN_OBJECT_IS_FORWARDED(obj) (((mword*)(obj))[0] & SGEN_FORWARDED_BIT ? (void*)(((mword*)(obj))[0] & ~SGEN_VTABLE_BITS_MASK) : NULL)
285 #define SGEN_OBJECT_IS_PINNED(obj) (((mword*)(obj))[0] & SGEN_PINNED_BIT)
287 /* set the forwarded address fw_addr for object obj */
288 #define SGEN_FORWARD_OBJECT(obj,fw_addr) do { \
289 ((mword*)(obj))[0] = (mword)(fw_addr) | SGEN_FORWARDED_BIT; \
291 #define SGEN_PIN_OBJECT(obj) do { \
292 ((mword*)(obj))[0] |= SGEN_PINNED_BIT; \
294 #define SGEN_UNPIN_OBJECT(obj) do { \
295 ((mword*)(obj))[0] &= ~SGEN_PINNED_BIT; \
299 * Since we set bits in the vtable, use the macro to load it from the pointer to
300 * an object that is potentially pinned.
302 #define SGEN_LOAD_VTABLE(addr) ((*(mword*)(addr)) & ~SGEN_VTABLE_BITS_MASK)
305 * ######################################################################
306 * ######## GC descriptors
307 * ######################################################################
308 * Used to quickly get the info the GC needs about an object: size and
309 * where the references are held.
311 #define OBJECT_HEADER_WORDS (sizeof(MonoObject)/sizeof(gpointer))
312 #define LOW_TYPE_BITS 3
313 #define SMALL_BITMAP_SHIFT 16
314 #define SMALL_BITMAP_SIZE (GC_BITS_PER_WORD - SMALL_BITMAP_SHIFT)
315 #define VECTOR_INFO_SHIFT 14
316 #define VECTOR_ELSIZE_SHIFT 3
317 #define LARGE_BITMAP_SIZE (GC_BITS_PER_WORD - LOW_TYPE_BITS)
318 #define MAX_ELEMENT_SIZE 0x3ff
319 #define VECTOR_SUBTYPE_PTRFREE (DESC_TYPE_V_PTRFREE << VECTOR_INFO_SHIFT)
320 #define VECTOR_SUBTYPE_REFS (DESC_TYPE_V_REFS << VECTOR_INFO_SHIFT)
321 #define VECTOR_SUBTYPE_RUN_LEN (DESC_TYPE_V_RUN_LEN << VECTOR_INFO_SHIFT)
322 #define VECTOR_SUBTYPE_BITMAP (DESC_TYPE_V_BITMAP << VECTOR_INFO_SHIFT)
324 /* objects are aligned to 8 bytes boundaries
325 * A descriptor is a pointer in MonoVTable, so 32 or 64 bits of size.
326 * The low 3 bits define the type of the descriptor. The other bits
327 * depend on the type.
328 * As a general rule the 13 remaining low bits define the size, either
329 * of the whole object or of the elements in the arrays. While for objects
330 * the size is already in bytes, for arrays we need to shift, because
331 * array elements might be smaller than 8 bytes. In case of arrays, we
332 * use two bits to describe what the additional high bits represents,
333 * so the default behaviour can handle element sizes less than 2048 bytes.
334 * The high 16 bits, if 0 it means the object is pointer-free.
335 * This design should make it easy and fast to skip over ptr-free data.
336 * The first 4 types should cover >95% of the objects.
337 * Note that since the size of objects is limited to 64K, larger objects
338 * will be allocated in the large object heap.
339 * If we want 4-bytes alignment, we need to put vector and small bitmap
344 * We don't use 0 so that 0 isn't a valid GC descriptor. No
345 * deep reason for this other than to be able to identify a
346 * non-inited descriptor for debugging.
348 * If an object contains no references, its GC descriptor is
349 * always DESC_TYPE_RUN_LENGTH, without a size, no exceptions.
350 * This is so that we can quickly check for that in
351 * copy_object_no_checks(), without having to fetch the
354 DESC_TYPE_RUN_LENGTH = 1, /* 15 bits aligned byte size | 1-3 (offset, numptr) bytes tuples */
355 DESC_TYPE_SMALL_BITMAP, /* 15 bits aligned byte size | 16-48 bit bitmap */
356 DESC_TYPE_COMPLEX, /* index for bitmap into complex_descriptors */
357 DESC_TYPE_VECTOR, /* 10 bits element size | 1 bit array | 2 bits desc | element desc */
358 DESC_TYPE_ARRAY, /* 10 bits element size | 1 bit array | 2 bits desc | element desc */
359 DESC_TYPE_LARGE_BITMAP, /* | 29-61 bitmap bits */
360 DESC_TYPE_COMPLEX_ARR, /* index for bitmap into complex_descriptors */
361 /* subtypes for arrays and vectors */
362 DESC_TYPE_V_PTRFREE = 0,/* there are no refs: keep first so it has a zero value */
363 DESC_TYPE_V_REFS, /* all the array elements are refs */
364 DESC_TYPE_V_RUN_LEN, /* elements are run-length encoded as DESC_TYPE_RUN_LENGTH */
365 DESC_TYPE_V_BITMAP /* elements are as the bitmap in DESC_TYPE_SMALL_BITMAP */
368 #define SGEN_VTABLE_HAS_REFERENCES(vt) (((MonoVTable*)(vt))->gc_descr != (void*)DESC_TYPE_RUN_LENGTH)
369 #define SGEN_CLASS_HAS_REFERENCES(c) ((c)->gc_descr != (void*)DESC_TYPE_RUN_LENGTH)
371 /* helper macros to scan and traverse objects, macros because we resue them in many functions */
372 #define OBJ_RUN_LEN_SIZE(size,desc,obj) do { \
373 (size) = ((desc) & 0xfff8) >> 1; \
376 #define OBJ_BITMAP_SIZE(size,desc,obj) do { \
377 (size) = ((desc) & 0xfff8) >> 1; \
381 #define PREFETCH(addr) __builtin_prefetch ((addr))
383 #define PREFETCH(addr)
386 /* code using these macros must define a HANDLE_PTR(ptr) macro that does the work */
387 #define OBJ_RUN_LEN_FOREACH_PTR(desc,obj) do { \
388 if ((desc) & 0xffff0000) { \
389 /* there are pointers */ \
390 void **_objptr_end; \
391 void **_objptr = (void**)(obj); \
392 _objptr += ((desc) >> 16) & 0xff; \
393 _objptr_end = _objptr + (((desc) >> 24) & 0xff); \
394 while (_objptr < _objptr_end) { \
395 HANDLE_PTR (_objptr, (obj)); \
401 /* a bitmap desc means that there are pointer references or we'd have
402 * choosen run-length, instead: add an assert to check.
404 #define OBJ_BITMAP_FOREACH_PTR(desc,obj) do { \
405 /* there are pointers */ \
406 void **_objptr = (void**)(obj); \
407 gsize _bmap = (desc) >> 16; \
408 _objptr += OBJECT_HEADER_WORDS; \
411 HANDLE_PTR (_objptr, (obj)); \
418 #define OBJ_LARGE_BITMAP_FOREACH_PTR(vt,obj) do { \
419 /* there are pointers */ \
420 void **_objptr = (void**)(obj); \
421 gsize _bmap = (vt)->desc >> LOW_TYPE_BITS; \
422 _objptr += OBJECT_HEADER_WORDS; \
425 HANDLE_PTR (_objptr, (obj)); \
432 gsize* mono_sgen_get_complex_descriptor (GCVTable *vt) MONO_INTERNAL;
434 #define OBJ_COMPLEX_FOREACH_PTR(vt,obj) do { \
435 /* there are pointers */ \
436 void **_objptr = (void**)(obj); \
437 gsize *bitmap_data = mono_sgen_get_complex_descriptor ((vt)); \
438 int bwords = (*bitmap_data) - 1; \
439 void **start_run = _objptr; \
442 MonoObject *myobj = (MonoObject*)obj; \
443 g_print ("found %d at %p (0x%zx): %s.%s\n", bwords, (obj), (vt)->desc, myobj->vtable->klass->name_space, myobj->vtable->klass->name); \
445 while (bwords-- > 0) { \
446 gsize _bmap = *bitmap_data++; \
447 _objptr = start_run; \
448 /*g_print ("bitmap: 0x%x/%d at %p\n", _bmap, bwords, _objptr);*/ \
451 HANDLE_PTR (_objptr, (obj)); \
456 start_run += GC_BITS_PER_WORD; \
460 /* this one is untested */
461 #define OBJ_COMPLEX_ARR_FOREACH_PTR(vt,obj) do { \
462 /* there are pointers */ \
463 gsize *mbitmap_data = mono_sgen_get_complex_descriptor ((vt)); \
464 int mbwords = (*mbitmap_data++) - 1; \
465 int el_size = mono_array_element_size (vt->klass); \
466 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
467 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
469 g_print ("found %d at %p (0x%zx): %s.%s\n", mbwords, (obj), (vt)->desc, vt->klass->name_space, vt->klass->name); \
470 while (e_start < e_end) { \
471 void **_objptr = (void**)e_start; \
472 gsize *bitmap_data = mbitmap_data; \
473 unsigned int bwords = mbwords; \
474 while (bwords-- > 0) { \
475 gsize _bmap = *bitmap_data++; \
476 void **start_run = _objptr; \
477 /*g_print ("bitmap: 0x%x\n", _bmap);*/ \
480 HANDLE_PTR (_objptr, (obj)); \
485 _objptr = start_run + GC_BITS_PER_WORD; \
487 e_start += el_size; \
491 #define OBJ_VECTOR_FOREACH_PTR(vt,obj) do { \
492 /* note: 0xffffc000 excludes DESC_TYPE_V_PTRFREE */ \
493 if ((vt)->desc & 0xffffc000) { \
494 int el_size = ((vt)->desc >> 3) & MAX_ELEMENT_SIZE; \
495 /* there are pointers */ \
496 int etype = (vt)->desc & 0xc000; \
497 if (etype == (DESC_TYPE_V_REFS << 14)) { \
498 void **p = (void**)((char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector)); \
499 void **end_refs = (void**)((char*)p + el_size * mono_array_length_fast ((MonoArray*)(obj))); \
500 /* Note: this code can handle also arrays of struct with only references in them */ \
501 while (p < end_refs) { \
502 HANDLE_PTR (p, (obj)); \
505 } else if (etype == DESC_TYPE_V_RUN_LEN << 14) { \
506 int offset = ((vt)->desc >> 16) & 0xff; \
507 int num_refs = ((vt)->desc >> 24) & 0xff; \
508 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
509 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
510 while (e_start < e_end) { \
511 void **p = (void**)e_start; \
514 for (i = 0; i < num_refs; ++i) { \
515 HANDLE_PTR (p + i, (obj)); \
517 e_start += el_size; \
519 } else if (etype == DESC_TYPE_V_BITMAP << 14) { \
520 char *e_start = (char*)(obj) + G_STRUCT_OFFSET (MonoArray, vector); \
521 char *e_end = e_start + el_size * mono_array_length_fast ((MonoArray*)(obj)); \
522 while (e_start < e_end) { \
523 void **p = (void**)e_start; \
524 gsize _bmap = (vt)->desc >> 16; \
525 /* Note: there is no object header here to skip */ \
528 HANDLE_PTR (p, (obj)); \
533 e_start += el_size; \
539 #define SGEN_GRAY_QUEUE_SECTION_SIZE (128 - 3)
542 * This is a stack now instead of a queue, so the most recently added items are removed
543 * first, improving cache locality, and keeping the stack size manageable.
545 typedef struct _GrayQueueSection GrayQueueSection;
546 struct _GrayQueueSection {
548 GrayQueueSection *next;
549 char *objects [SGEN_GRAY_QUEUE_SECTION_SIZE];
552 typedef struct _SgenGrayQueue SgenGrayQueue;
554 typedef void (*GrayQueueAllocPrepareFunc) (SgenGrayQueue*);
556 struct _SgenGrayQueue {
557 GrayQueueSection *first;
558 GrayQueueSection *free_list;
560 GrayQueueAllocPrepareFunc alloc_prepare_func;
561 void *alloc_prepare_data;
564 #if SGEN_MAX_DEBUG_LEVEL >= 9
565 #define GRAY_OBJECT_ENQUEUE gray_object_enqueue
566 #define GRAY_OBJECT_DEQUEUE(queue,o) ((o) = gray_object_dequeue ((queue)))
568 #define GRAY_OBJECT_ENQUEUE(queue,o) do { \
569 if (G_UNLIKELY (!(queue)->first || (queue)->first->end == SGEN_GRAY_QUEUE_SECTION_SIZE)) \
570 mono_sgen_gray_object_enqueue ((queue), (o)); \
572 (queue)->first->objects [(queue)->first->end++] = (o); \
575 #define GRAY_OBJECT_DEQUEUE(queue,o) do { \
576 if (!(queue)->first) \
578 else if (G_UNLIKELY ((queue)->first->end == 1)) \
579 (o) = mono_sgen_gray_object_dequeue ((queue)); \
581 (o) = (queue)->first->objects [--(queue)->first->end]; \
585 void mono_sgen_gray_object_enqueue (SgenGrayQueue *queue, char *obj) MONO_INTERNAL;
586 char* mono_sgen_gray_object_dequeue (SgenGrayQueue *queue) MONO_INTERNAL;
588 typedef void (*IterateObjectCallbackFunc) (char*, size_t, void*);
590 void* mono_sgen_alloc_os_memory (size_t size, int activate) MONO_INTERNAL;
591 void* mono_sgen_alloc_os_memory_aligned (mword size, mword alignment, gboolean activate) MONO_INTERNAL;
592 void mono_sgen_free_os_memory (void *addr, size_t size) MONO_INTERNAL;
594 int mono_sgen_thread_handshake (int signum) MONO_INTERNAL;
595 gboolean mono_sgen_suspend_thread (SgenThreadInfo *info) MONO_INTERNAL;
596 gboolean mono_sgen_resume_thread (SgenThreadInfo *info) MONO_INTERNAL;
599 void mono_sgen_wait_for_suspend_ack (int count) MONO_INTERNAL;
601 gboolean mono_sgen_is_worker_thread (pthread_t thread) MONO_INTERNAL;
603 void mono_sgen_update_heap_boundaries (mword low, mword high) MONO_INTERNAL;
605 void mono_sgen_register_major_sections_alloced (int num_sections) MONO_INTERNAL;
606 mword mono_sgen_get_minor_collection_allowance (void) MONO_INTERNAL;
608 void mono_sgen_scan_area_with_callback (char *start, char *end, IterateObjectCallbackFunc callback, void *data, gboolean allow_flags) MONO_INTERNAL;
609 void mono_sgen_check_section_scan_starts (GCMemSection *section) MONO_INTERNAL;
611 /* Keep in sync with mono_sgen_dump_internal_mem_usage() in dump_heap()! */
613 INTERNAL_MEM_PIN_QUEUE,
614 INTERNAL_MEM_FRAGMENT,
615 INTERNAL_MEM_SECTION,
616 INTERNAL_MEM_SCAN_STARTS,
617 INTERNAL_MEM_FIN_TABLE,
618 INTERNAL_MEM_FINALIZE_ENTRY,
619 INTERNAL_MEM_DISLINK_TABLE,
620 INTERNAL_MEM_DISLINK,
621 INTERNAL_MEM_ROOTS_TABLE,
622 INTERNAL_MEM_ROOT_RECORD,
623 INTERNAL_MEM_STATISTICS,
625 INTERNAL_MEM_GRAY_QUEUE,
626 INTERNAL_MEM_STORE_REMSET,
627 INTERNAL_MEM_MS_TABLES,
628 INTERNAL_MEM_MS_BLOCK_INFO,
629 INTERNAL_MEM_EPHEMERON_LINK,
630 INTERNAL_MEM_WORKER_DATA,
631 INTERNAL_MEM_BRIDGE_DATA,
632 INTERNAL_MEM_JOB_QUEUE_ENTRY,
636 #define SGEN_PINNED_FREELIST_NUM_SLOTS 30
639 SgenPinnedChunk *chunk_list;
640 SgenPinnedChunk *free_lists [SGEN_PINNED_FREELIST_NUM_SLOTS];
641 void *delayed_free_lists [SGEN_PINNED_FREELIST_NUM_SLOTS];
642 } SgenPinnedAllocator;
650 void mono_sgen_init_internal_allocator (void) MONO_INTERNAL;
651 void mono_sgen_init_pinned_allocator (void) MONO_INTERNAL;
653 void mono_sgen_report_internal_mem_usage (void) MONO_INTERNAL;
654 void mono_sgen_report_pinned_mem_usage (SgenPinnedAllocator *alc) MONO_INTERNAL;
655 void mono_sgen_dump_internal_mem_usage (FILE *heap_dump_file) MONO_INTERNAL;
656 void mono_sgen_dump_section (GCMemSection *section, const char *type) MONO_INTERNAL;
657 void mono_sgen_dump_occupied (char *start, char *end, char *section_start) MONO_INTERNAL;
659 void mono_sgen_register_moved_object (void *obj, void *destination) MONO_INTERNAL;
661 void mono_sgen_register_fixed_internal_mem_type (int type, size_t size) MONO_INTERNAL;
663 void* mono_sgen_alloc_internal (int type) MONO_INTERNAL;
664 void mono_sgen_free_internal (void *addr, int type) MONO_INTERNAL;
666 void* mono_sgen_alloc_internal_dynamic (size_t size, int type) MONO_INTERNAL;
667 void mono_sgen_free_internal_dynamic (void *addr, size_t size, int type) MONO_INTERNAL;
669 void* mono_sgen_alloc_pinned (SgenPinnedAllocator *allocator, size_t size) MONO_INTERNAL;
670 void mono_sgen_free_pinned (SgenPinnedAllocator *allocator, void *addr, size_t size) MONO_INTERNAL;
673 void mono_sgen_debug_printf (int level, const char *format, ...) MONO_INTERNAL;
675 gboolean mono_sgen_parse_environment_string_extract_number (const char *str, glong *out) MONO_INTERNAL;
677 void mono_sgen_pinned_scan_objects (SgenPinnedAllocator *alc, IterateObjectCallbackFunc callback, void *callback_data) MONO_INTERNAL;
678 void mono_sgen_pinned_scan_pinned_objects (SgenPinnedAllocator *alc, IterateObjectCallbackFunc callback, void *callback_data) MONO_INTERNAL;
680 void mono_sgen_pinned_update_heap_boundaries (SgenPinnedAllocator *alc) MONO_INTERNAL;
682 void** mono_sgen_find_optimized_pin_queue_area (void *start, void *end, int *num) MONO_INTERNAL;
683 void mono_sgen_find_section_pin_queue_start_end (GCMemSection *section) MONO_INTERNAL;
684 void mono_sgen_pin_objects_in_section (GCMemSection *section, SgenGrayQueue *queue) MONO_INTERNAL;
686 void mono_sgen_pin_stats_register_object (char *obj, size_t size);
688 void mono_sgen_add_to_global_remset (gpointer ptr) MONO_INTERNAL;
690 int mono_sgen_get_current_collection_generation (void) MONO_INTERNAL;
692 typedef void (*sgen_cardtable_block_callback) (mword start, mword size);
694 typedef struct _SgenMajorCollector SgenMajorCollector;
695 struct _SgenMajorCollector {
697 gboolean is_parallel;
698 gboolean supports_cardtable;
701 * This is set to TRUE if the sweep for the last major
702 * collection has been completed.
704 gboolean *have_swept;
706 void* (*alloc_heap) (mword nursery_size, mword nursery_align, int nursery_bits);
707 gboolean (*is_object_live) (char *obj);
708 void* (*alloc_small_pinned_obj) (size_t size, gboolean has_references);
709 void* (*alloc_degraded) (MonoVTable *vtable, size_t size);
710 void (*copy_or_mark_object) (void **obj_slot, SgenGrayQueue *queue);
711 void (*minor_scan_object) (char *start, SgenGrayQueue *queue);
712 char* (*minor_scan_vtype) (char *start, mword desc, char* from_start, char* from_end, SgenGrayQueue *queue);
713 void (*major_scan_object) (char *start, SgenGrayQueue *queue);
714 void (*copy_object) (void **obj_slot, SgenGrayQueue *queue);
715 void* (*alloc_object) (int size, gboolean has_references);
716 void (*free_pinned_object) (char *obj, size_t size);
717 void (*iterate_objects) (gboolean non_pinned, gboolean pinned, IterateObjectCallbackFunc callback, void *data);
718 void (*free_non_pinned_object) (char *obj, size_t size);
719 void (*find_pin_queue_start_ends) (SgenGrayQueue *queue);
720 void (*pin_objects) (SgenGrayQueue *queue);
721 void (*scan_card_table) (SgenGrayQueue *queue);
722 void (*iterate_live_block_ranges) (sgen_cardtable_block_callback callback);
723 void (*init_to_space) (void);
724 void (*sweep) (void);
725 void (*check_scan_starts) (void);
726 void (*dump_heap) (FILE *heap_dump_file);
727 gint64 (*get_used_size) (void);
728 void (*start_nursery_collection) (void);
729 void (*finish_nursery_collection) (void);
730 void (*start_major_collection) (void);
731 void (*finish_major_collection) (void);
732 void (*have_computed_minor_collection_allowance) (void);
733 gboolean (*ptr_is_in_non_pinned_space) (char *ptr);
734 gboolean (*obj_is_from_pinned_alloc) (char *obj);
735 void (*report_pinned_memory_usage) (void);
736 int (*get_num_major_sections) (void);
737 gboolean (*handle_gc_param) (const char *opt);
738 void (*print_gc_param_usage) (void);
739 gboolean (*is_worker_thread) (pthread_t thread);
740 void (*post_param_init) (void);
741 void* (*alloc_worker_data) (void);
742 void (*init_worker_thread) (void *data);
743 void (*reset_worker_data) (void *data);
746 void mono_sgen_marksweep_init (SgenMajorCollector *collector) MONO_INTERNAL;
747 void mono_sgen_marksweep_fixed_init (SgenMajorCollector *collector) MONO_INTERNAL;
748 void mono_sgen_marksweep_par_init (SgenMajorCollector *collector) MONO_INTERNAL;
749 void mono_sgen_marksweep_fixed_par_init (SgenMajorCollector *collector) MONO_INTERNAL;
750 void mono_sgen_copying_init (SgenMajorCollector *collector) MONO_INTERNAL;
753 * This function can be called on an object whose first word, the
754 * vtable field, is not intact. This is necessary for the parallel
758 mono_sgen_par_object_get_size (MonoVTable *vtable, MonoObject* o)
760 MonoClass *klass = vtable->klass;
762 * We depend on mono_string_length_fast and
763 * mono_array_length_fast not using the object's vtable.
765 if (klass == mono_defaults.string_class) {
766 return sizeof (MonoString) + 2 * mono_string_length_fast ((MonoString*) o) + 2;
767 } else if (klass->rank) {
768 MonoArray *array = (MonoArray*)o;
769 size_t size = sizeof (MonoArray) + klass->sizes.element_size * mono_array_length_fast (array);
770 if (G_UNLIKELY (array->bounds)) {
771 size += sizeof (mono_array_size_t) - 1;
772 size &= ~(sizeof (mono_array_size_t) - 1);
773 size += sizeof (MonoArrayBounds) * klass->rank;
777 /* from a created object: the class must be inited already */
778 return klass->instance_size;
782 #define mono_sgen_safe_object_get_size(o) mono_sgen_par_object_get_size ((MonoVTable*)SGEN_LOAD_VTABLE ((o)), (o))
784 const char* mono_sgen_safe_name (void* obj) MONO_INTERNAL;
786 gboolean mono_sgen_object_is_live (void *obj) MONO_INTERNAL;
788 gboolean mono_sgen_need_bridge_processing (void) MONO_INTERNAL;
789 void mono_sgen_bridge_processing (int num_objs, MonoObject **objs) MONO_INTERNAL;
790 void mono_sgen_register_test_bridge_callbacks (void) MONO_INTERNAL;
797 gboolean mono_sgen_try_alloc_space (mword size, int space) MONO_INTERNAL;
798 void mono_sgen_release_space (mword size, int space) MONO_INTERNAL;
799 void mono_sgen_pin_object (void *object, SgenGrayQueue *queue) MONO_INTERNAL;
800 void sgen_collect_major_no_lock (const char *reason) MONO_INTERNAL;
801 gboolean mono_sgen_need_major_collection (mword space_needed) MONO_INTERNAL;
805 typedef struct _LOSObject LOSObject;
808 mword size; /* this is the object size */
810 int dummy; /* to have a sizeof (LOSObject) a multiple of ALLOC_ALIGN and data starting at same alignment */
811 char data [MONO_ZERO_LEN_ARRAY];
814 #define ARRAY_OBJ_INDEX(ptr,array,elem_size) (((char*)(ptr) - ((char*)(array) + G_STRUCT_OFFSET (MonoArray, vector))) / (elem_size))
816 extern LOSObject *los_object_list;
817 extern mword los_memory_usage;
818 extern mword last_los_memory_usage;
820 void mono_sgen_los_free_object (LOSObject *obj) MONO_INTERNAL;
821 void* mono_sgen_los_alloc_large_inner (MonoVTable *vtable, size_t size) MONO_INTERNAL;
822 void mono_sgen_los_sweep (void) MONO_INTERNAL;
823 gboolean mono_sgen_ptr_is_in_los (char *ptr, char **start) MONO_INTERNAL;
824 void mono_sgen_los_iterate_objects (IterateObjectCallbackFunc cb, void *user_data) MONO_INTERNAL;
825 void mono_sgen_los_iterate_live_block_ranges (sgen_cardtable_block_callback callback) MONO_INTERNAL;
826 void mono_sgen_los_scan_card_table (SgenGrayQueue *queue) MONO_INTERNAL;
827 FILE *mono_sgen_get_logfile (void) MONO_INTERNAL;
829 #endif /* HAVE_SGEN_GC */
831 #endif /* __MONO_SGENGC_H__ */