mono/metadata/sgen-major-copying.c

   1 /*
   2  * sgen-major-copying.c: Simple generational GC.
   3  *
   4  * Author:
   5  *      Paolo Molaro (lupus@ximian.com)
   6  *
   7  * Copyright 2005-2010 Novell, Inc (http://www.novell.com)
   8  *
   9  * Thread start/stop adapted from Boehm's GC:
  10  * Copyright (c) 1994 by Xerox Corporation.  All rights reserved.
  11  * Copyright (c) 1996 by Silicon Graphics.  All rights reserved.
  12  * Copyright (c) 1998 by Fergus Henderson.  All rights reserved.
  13  * Copyright (c) 2000-2004 by Hewlett-Packard Company.  All rights reserved.
  14  *
  15  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
  16  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
  17  *
  18  * Permission is hereby granted to use or copy this program
  19  * for any purpose,  provided the above notices are retained on all copies.
  20  * Permission to modify the code and to distribute modified code is granted,
  21  * provided the above notices are retained, and a notice that the code was
  22  * modified is included with the above copyright notice.
  23  *
  24  *
  25  * Copyright 2001-2003 Ximian, Inc
  26  * Copyright 2003-2010 Novell, Inc.
  27  *
  28  * Permission is hereby granted, free of charge, to any person obtaining
  29  * a copy of this software and associated documentation files (the
  30  * "Software"), to deal in the Software without restriction, including
  31  * without limitation the rights to use, copy, modify, merge, publish,
  32  * distribute, sublicense, and/or sell copies of the Software, and to
  33  * permit persons to whom the Software is furnished to do so, subject to
  34  * the following conditions:
  35  *
  36  * The above copyright notice and this permission notice shall be
  37  * included in all copies or substantial portions of the Software.
  38  *
  39  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  40  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  41  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  42  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  43  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  44  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  45  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  46  */
  47
  48 #ifdef HAVE_SGEN_GC
  49
  50 #include "utils/mono-counters.h"
  51 #include "metadata/object-internals.h"
  52 #include "metadata/profiler-private.h"
  53
  54 #include "metadata/sgen-gc.h"
  55 #include "metadata/sgen-protocol.h"
  56
  57 #define DEBUG(l,x)
  58
  59 #define MAJOR_SECTION_SIZE              SGEN_PINNED_CHUNK_SIZE
  60 #define BLOCK_FOR_OBJECT(o)             SGEN_PINNED_CHUNK_FOR_PTR ((o))
  61 #define MAJOR_SECTION_FOR_OBJECT(o)     ((GCMemSection*)BLOCK_FOR_OBJECT ((o)))
  62
  63 #define MAJOR_OBJ_IS_IN_TO_SPACE(o)     (MAJOR_SECTION_FOR_OBJECT ((o))->is_to_space)
  64
  65 static int num_major_sections = 0;
  66
  67 static GCMemSection *section_list = NULL;
  68
  69 static SgenInternalAllocator pinned_allocator;
  70
  71 /*
  72  * used when moving the objects
  73  */
  74 static char *to_space_bumper = NULL;
  75 static char *to_space_top = NULL;
  76 static GCMemSection *to_space_section = NULL;
  77
  78 /* we get this at init */
  79 static int nursery_bits;
  80 static char *nursery_start;
  81 static char *nursery_end;
  82
  83 #define ptr_in_nursery(p)       (SGEN_PTR_IN_NURSERY ((p), nursery_bits, nursery_start, nursery_end))
  84
  85 #ifdef HEAVY_STATISTICS
  86 static long stat_major_copy_object_failed_forwarded = 0;
  87 static long stat_major_copy_object_failed_pinned = 0;
  88 static long stat_major_copy_object_failed_large_pinned = 0;
  89 static long stat_major_copy_object_failed_to_space = 0;
  90 #endif
  91
  92 static void*
  93 major_alloc_heap (mword nursery_size, mword nursery_align, int the_nursery_bits)
  94 {
  95         if (nursery_align)
  96                 nursery_start = mono_sgen_alloc_os_memory_aligned (nursery_size, nursery_align, TRUE);
  97         else
  98                 nursery_start = mono_sgen_alloc_os_memory (nursery_size, TRUE);
  99
 100         nursery_end = nursery_start + nursery_size;
 101         nursery_bits = the_nursery_bits;
 102
 103         return nursery_start;
 104 }
 105
 106 static gboolean
 107 obj_is_from_pinned_alloc (char *p)
 108 {
 109         return BLOCK_FOR_OBJECT (p)->role == MEMORY_ROLE_PINNED;
 110 }
 111
 112 static void
 113 free_pinned_object (char *obj, size_t size)
 114 {
 115         mono_sgen_free_internal_full (&pinned_allocator, obj, size, INTERNAL_MEM_MANAGED);
 116 }
 117
 118 /*
 119  * Allocate a new section of memory to be used as old generation.
 120  */
 121 static GCMemSection*
 122 alloc_major_section (void)
 123 {
 124         GCMemSection *section;
 125         int scan_starts;
 126
 127         section = mono_sgen_alloc_os_memory_aligned (MAJOR_SECTION_SIZE, MAJOR_SECTION_SIZE, TRUE);
 128         section->next_data = section->data = (char*)section + SGEN_SIZEOF_GC_MEM_SECTION;
 129         g_assert (!((mword)section->data & 7));
 130         section->size = MAJOR_SECTION_SIZE - SGEN_SIZEOF_GC_MEM_SECTION;
 131         section->end_data = section->data + section->size;
 132         mono_sgen_update_heap_boundaries ((mword)section->data, (mword)section->end_data);
 133         DEBUG (3, fprintf (gc_debug_file, "New major heap section: (%p-%p), total: %zd\n", section->data, section->end_data, total_alloc));
 134         scan_starts = (section->size + SGEN_SCAN_START_SIZE - 1) / SGEN_SCAN_START_SIZE;
 135         section->scan_starts = mono_sgen_alloc_internal_dynamic (sizeof (char*) * scan_starts, INTERNAL_MEM_SCAN_STARTS);
 136         section->num_scan_start = scan_starts;
 137         section->block.role = MEMORY_ROLE_GEN1;
 138         section->is_to_space = TRUE;
 139
 140         /* add to the section list */
 141         section->block.next = section_list;
 142         section_list = section;
 143
 144         ++num_major_sections;
 145
 146         return section;
 147 }
 148
 149 static void
 150 free_major_section (GCMemSection *section)
 151 {
 152         DEBUG (3, fprintf (gc_debug_file, "Freed major section %p (%p-%p)\n", section, section->data, section->end_data));
 153         mono_sgen_free_internal_dynamic (section->scan_starts,
 154                         (section->size + SGEN_SCAN_START_SIZE - 1) / SGEN_SCAN_START_SIZE * sizeof (char*), INTERNAL_MEM_SCAN_STARTS);
 155         mono_sgen_free_os_memory (section, MAJOR_SECTION_SIZE);
 156
 157         --num_major_sections;
 158 }
 159
 160 static void
 161 new_to_space_section (void)
 162 {
 163         /* FIXME: if the current to_space_section is empty, we don't
 164            have to allocate a new one */
 165
 166         to_space_section = alloc_major_section ();
 167         to_space_bumper = to_space_section->next_data;
 168         to_space_top = to_space_section->end_data;
 169 }
 170
 171 static void
 172 to_space_set_next_data (void)
 173 {
 174         g_assert (to_space_bumper >= to_space_section->next_data && to_space_bumper <= to_space_section->end_data);
 175         to_space_section->next_data = to_space_bumper;
 176 }
 177
 178 static void
 179 to_space_expand (void)
 180 {
 181         if (to_space_section) {
 182                 g_assert (to_space_top == to_space_section->end_data);
 183                 to_space_set_next_data ();
 184         }
 185
 186         new_to_space_section ();
 187 }
 188
 189 static void*
 190 major_alloc_object (int size, gboolean has_references)
 191 {
 192         char *dest = to_space_bumper;
 193         /* Make sure we have enough space available */
 194         if (dest + size > to_space_top) {
 195                 to_space_expand ();
 196                 (dest) = to_space_bumper;
 197                 DEBUG (8, g_assert (dest + size <= to_space_top));
 198         }
 199         to_space_bumper += size;
 200         DEBUG (8, g_assert (to_space_bumper <= to_space_top));
 201         to_space_section->scan_starts [(dest - (char*)to_space_section->data)/SGEN_SCAN_START_SIZE] = dest;
 202         return dest;
 203 }
 204
 205 static void
 206 unset_to_space (void)
 207 {
 208         /* between collections the to_space_bumper is invalidated
 209            because degraded allocations might occur, so we set it to
 210            NULL, just to make it explicit */
 211         to_space_bumper = NULL;
 212
 213         /* don't unset to_space_section if we implement the FIXME in
 214            new_to_space_section */
 215         to_space_section = NULL;
 216 }
 217
 218 static gboolean
 219 major_is_object_live (char *obj)
 220 {
 221         mword objsize;
 222
 223         /* nursery */
 224         if (ptr_in_nursery (obj))
 225                 return FALSE;
 226
 227         objsize = SGEN_ALIGN_UP (mono_sgen_safe_object_get_size ((MonoObject*)obj));
 228
 229         /* LOS */
 230         if (objsize > SGEN_MAX_SMALL_OBJ_SIZE)
 231                 return FALSE;
 232
 233         /* pinned chunk */
 234         if (obj_is_from_pinned_alloc (obj))
 235                 return FALSE;
 236
 237         /* now we know it's in a major heap section */
 238         return MAJOR_SECTION_FOR_OBJECT (obj)->is_to_space;
 239 }
 240
 241 /* size is a multiple of ALLOC_ALIGN */
 242 static void*
 243 major_alloc_small_pinned_obj (size_t size, gboolean has_references)
 244 {
 245         return mono_sgen_alloc_internal_full (&pinned_allocator, size, INTERNAL_MEM_MANAGED);
 246 }
 247
 248 /*
 249  * size is already rounded up and we hold the GC lock.
 250  */
 251 static void*
 252 major_alloc_degraded (MonoVTable *vtable, size_t size)
 253 {
 254         GCMemSection *section;
 255         void **p = NULL;
 256         g_assert (size <= SGEN_MAX_SMALL_OBJ_SIZE);
 257         HEAVY_STAT (++stat_objects_alloced_degraded);
 258         HEAVY_STAT (stat_bytes_alloced_degraded += size);
 259         for (section = section_list; section; section = section->block.next) {
 260                 if ((section->end_data - section->next_data) >= size) {
 261                         p = (void**)section->next_data;
 262                         break;
 263                 }
 264         }
 265         if (!p) {
 266                 section = alloc_major_section ();
 267                 section->is_to_space = FALSE;
 268                 /* FIXME: handle OOM */
 269                 p = (void**)section->next_data;
 270                 mono_sgen_register_major_sections_alloced (1);
 271         }
 272         section->next_data += size;
 273         DEBUG (3, fprintf (gc_debug_file, "Allocated (degraded) object %p, vtable: %p (%s), size: %zd in section %p\n", p, vtable, vtable->klass->name, size, section));
 274         *p = vtable;
 275         return p;
 276 }
 277
 278 #include "sgen-major-copy-object.h"
 279
 280 static void
 281 major_copy_or_mark_object (void **obj_slot, SgenGrayQueue *queue)
 282 {
 283         char *forwarded;
 284         char *obj = *obj_slot;
 285         mword objsize;
 286
 287         DEBUG (9, g_assert (current_collection_generation == GENERATION_OLD));
 288
 289         HEAVY_STAT (++stat_copy_object_called_major);
 290
 291         DEBUG (9, fprintf (gc_debug_file, "Precise copy of %p from %p", obj, obj_slot));
 292
 293         /*
 294          * obj must belong to one of:
 295          *
 296          * 1. the nursery
 297          * 2. the LOS
 298          * 3. a pinned chunk
 299          * 4. a non-to-space section of the major heap
 300          * 5. a to-space section of the major heap
 301          *
 302          * In addition, objects in 1, 2 and 4 might also be pinned.
 303          * Objects in 1 and 4 might be forwarded.
 304          *
 305          * Before we can copy the object we must make sure that we are
 306          * allowed to, i.e. that the object not pinned, not already
 307          * forwarded and doesn't belong to the LOS, a pinned chunk, or
 308          * a to-space section.
 309          *
 310          * We are usually called for to-space objects (5) when we have
 311          * two remset entries for the same reference.  The first entry
 312          * copies the object and updates the reference and the second
 313          * calls us with the updated reference that points into
 314          * to-space.  There might also be other circumstances where we
 315          * get to-space objects.
 316          */
 317
 318         if ((forwarded = SGEN_OBJECT_IS_FORWARDED (obj))) {
 319                 DEBUG (9, g_assert (((MonoVTable*)SGEN_LOAD_VTABLE(obj))->gc_descr));
 320                 DEBUG (9, fprintf (gc_debug_file, " (already forwarded to %p)\n", forwarded));
 321                 HEAVY_STAT (++stat_major_copy_object_failed_forwarded);
 322                 *obj_slot = forwarded;
 323                 return;
 324         }
 325         if (SGEN_OBJECT_IS_PINNED (obj)) {
 326                 DEBUG (9, g_assert (((MonoVTable*)SGEN_LOAD_VTABLE(obj))->gc_descr));
 327                 DEBUG (9, fprintf (gc_debug_file, " (pinned, no change)\n"));
 328                 HEAVY_STAT (++stat_major_copy_object_failed_pinned);
 329                 return;
 330         }
 331
 332         if (ptr_in_nursery (obj))
 333                 goto copy;
 334
 335         /*
 336          * At this point we know obj is not pinned, not forwarded and
 337          * belongs to 2, 3, 4, or 5.
 338          *
 339          * LOS object (2) are simple, at least until we always follow
 340          * the rule: if objsize > SGEN_MAX_SMALL_OBJ_SIZE, pin the
 341          * object and return it.  At the end of major collections, we
 342          * walk the los list and if the object is pinned, it is
 343          * marked, otherwise it can be freed.
 344          *
 345          * Pinned chunks (3) and major heap sections (4, 5) both
 346          * reside in blocks, which are always aligned, so once we've
 347          * eliminated LOS objects, we can just access the block and
 348          * see whether it's a pinned chunk or a major heap section.
 349          */
 350
 351         objsize = SGEN_ALIGN_UP (mono_sgen_safe_object_get_size ((MonoObject*)obj));
 352
 353         if (G_UNLIKELY (objsize > SGEN_MAX_SMALL_OBJ_SIZE || obj_is_from_pinned_alloc (obj))) {
 354                 if (SGEN_OBJECT_IS_PINNED (obj))
 355                         return;
 356                 DEBUG (9, fprintf (gc_debug_file, " (marked LOS/Pinned %p (%s), size: %zd)\n", obj, safe_name (obj), objsize));
 357                 binary_protocol_pin (obj, (gpointer)SGEN_LOAD_VTABLE (obj), mono_sgen_safe_object_get_size ((MonoObject*)obj));
 358                 SGEN_PIN_OBJECT (obj);
 359                 GRAY_OBJECT_ENQUEUE (queue, obj);
 360                 HEAVY_STAT (++stat_major_copy_object_failed_large_pinned);
 361                 return;
 362         }
 363
 364         /*
 365          * Now we know the object is in a major heap section.  All we
 366          * need to do is check whether it's already in to-space (5) or
 367          * not (4).
 368          */
 369         if (MAJOR_OBJ_IS_IN_TO_SPACE (obj)) {
 370                 DEBUG (9, g_assert (objsize <= SGEN_MAX_SMALL_OBJ_SIZE));
 371                 DEBUG (9, fprintf (gc_debug_file, " (already copied)\n"));
 372                 HEAVY_STAT (++stat_major_copy_object_failed_to_space);
 373                 return;
 374         }
 375
 376  copy:
 377         HEAVY_STAT (++stat_objects_copied_major);
 378
 379         *obj_slot = copy_object_no_checks (obj, queue);
 380 }
 381
 382 #include "sgen-major-scan-object.h"
 383
 384 /* FIXME: later reduce code duplication here with build_nursery_fragments().
 385  * We don't keep track of section fragments for non-nursery sections yet, so
 386  * just memset to 0.
 387  */
 388 static void
 389 build_section_fragments (GCMemSection *section)
 390 {
 391         int i;
 392         char *frag_start, *frag_end;
 393         size_t frag_size;
 394
 395         /* clear scan starts */
 396         memset (section->scan_starts, 0, section->num_scan_start * sizeof (gpointer));
 397         frag_start = section->data;
 398         section->next_data = section->data;
 399         for (i = 0; i < section->pin_queue_num_entries; ++i) {
 400                 frag_end = section->pin_queue_start [i];
 401                 /* remove the pin bit from pinned objects */
 402                 SGEN_UNPIN_OBJECT (frag_end);
 403                 if (frag_end >= section->data + section->size) {
 404                         frag_end = section->data + section->size;
 405                 } else {
 406                         section->scan_starts [((char*)frag_end - (char*)section->data)/SGEN_SCAN_START_SIZE] = frag_end;
 407                 }
 408                 frag_size = frag_end - frag_start;
 409                 if (frag_size) {
 410                         binary_protocol_empty (frag_start, frag_size);
 411                         memset (frag_start, 0, frag_size);
 412                 }
 413                 frag_size = SGEN_ALIGN_UP (mono_sgen_safe_object_get_size ((MonoObject*)section->pin_queue_start [i]));
 414                 frag_start = (char*)section->pin_queue_start [i] + frag_size;
 415                 section->next_data = MAX (section->next_data, frag_start);
 416         }
 417         frag_end = section->end_data;
 418         frag_size = frag_end - frag_start;
 419         if (frag_size) {
 420                 binary_protocol_empty (frag_start, frag_size);
 421                 memset (frag_start, 0, frag_size);
 422         }
 423 }
 424
 425 static void
 426 sweep_pinned_objects_callback (char *ptr, size_t size, void *data)
 427 {
 428         if (SGEN_OBJECT_IS_PINNED (ptr)) {
 429                 SGEN_UNPIN_OBJECT (ptr);
 430                 DEBUG (6, fprintf (gc_debug_file, "Unmarked pinned object %p (%s)\n", ptr, safe_name (ptr)));
 431         } else {
 432                 DEBUG (6, fprintf (gc_debug_file, "Freeing unmarked pinned object %p (%s)\n", ptr, safe_name (ptr)));
 433                 free_pinned_object (ptr, size);
 434         }
 435 }
 436
 437 static void
 438 sweep_pinned_objects (void)
 439 {
 440         mono_sgen_internal_scan_objects (&pinned_allocator, sweep_pinned_objects_callback, NULL);
 441 }
 442
 443 static void
 444 major_iterate_objects (gboolean non_pinned, gboolean pinned, IterateObjectCallbackFunc callback, void *data)
 445 {
 446         if (non_pinned) {
 447                 GCMemSection *section;
 448                 for (section = section_list; section; section = section->block.next)
 449                         mono_sgen_scan_area_with_callback (section->data, section->end_data, callback, data);
 450         }
 451         if (pinned)
 452                 mono_sgen_internal_scan_objects (&pinned_allocator, callback, data);
 453 }
 454
 455 static void
 456 major_free_non_pinned_object (char *obj, size_t size)
 457 {
 458         memset (obj, 0, size);
 459 }
 460
 461 static void
 462 pin_pinned_object_callback (void *addr, size_t slot_size, SgenGrayQueue *queue)
 463 {
 464         binary_protocol_pin (addr, (gpointer)SGEN_LOAD_VTABLE (addr), mono_sgen_safe_object_get_size ((MonoObject*)addr));
 465         if (!SGEN_OBJECT_IS_PINNED (addr))
 466                 mono_sgen_pin_stats_register_object ((char*) addr, mono_sgen_safe_object_get_size ((MonoObject*) addr));
 467         SGEN_PIN_OBJECT (addr);
 468         GRAY_OBJECT_ENQUEUE (queue, addr);
 469         DEBUG (6, fprintf (gc_debug_file, "Marked pinned object %p (%s) from roots\n", addr, safe_name (addr)));
 470 }
 471
 472 static void
 473 major_find_pin_queue_start_ends (SgenGrayQueue *queue)
 474 {
 475         GCMemSection *section;
 476
 477         for (section = section_list; section; section = section->block.next)
 478                 mono_sgen_find_section_pin_queue_start_end (section);
 479         mono_sgen_internal_scan_pinned_objects (&pinned_allocator, (IterateObjectCallbackFunc)pin_pinned_object_callback, queue);
 480 }
 481
 482 static void
 483 major_pin_objects (SgenGrayQueue *queue)
 484 {
 485         GCMemSection *section;
 486
 487         for (section = section_list; section; section = section->block.next)
 488                 mono_sgen_pin_objects_in_section (section, queue);
 489 }
 490
 491 static void
 492 major_init_to_space (void)
 493 {
 494         new_to_space_section ();
 495 }
 496
 497 static void
 498 major_sweep (void)
 499 {
 500         GCMemSection *section, *prev_section;
 501
 502         to_space_set_next_data ();
 503         unset_to_space ();
 504
 505         /* unpin objects from the pinned chunks and free the unmarked ones */
 506         sweep_pinned_objects ();
 507
 508         /* free the unused sections */
 509         prev_section = NULL;
 510         for (section = section_list; section;) {
 511                 /* to_space doesn't need handling here */
 512                 if (section->is_to_space) {
 513                         section->is_to_space = FALSE;
 514                         prev_section = section;
 515                         section = section->block.next;
 516                         continue;
 517                 }
 518                 /* no pinning object, so the section is free */
 519                 if (!section->pin_queue_num_entries) {
 520                         GCMemSection *to_free;
 521                         g_assert (!section->pin_queue_start);
 522                         if (prev_section)
 523                                 prev_section->block.next = section->block.next;
 524                         else
 525                                 section_list = section->block.next;
 526                         to_free = section;
 527                         section = section->block.next;
 528                         free_major_section (to_free);
 529                         continue;
 530                 } else {
 531                         DEBUG (6, fprintf (gc_debug_file, "Section %p has still pinned objects (%d)\n", section, section->pin_queue_num_entries));
 532                         build_section_fragments (section);
 533                 }
 534                 prev_section = section;
 535                 section = section->block.next;
 536         }
 537 }
 538
 539 static void
 540 major_check_scan_starts (void)
 541 {
 542         GCMemSection *section;
 543         for (section = section_list; section; section = section->block.next)
 544                 mono_sgen_check_section_scan_starts (section);
 545 }
 546
 547 static void
 548 major_dump_heap (FILE *heap_dump_file)
 549 {
 550         GCMemSection *section;
 551         for (section = section_list; section; section = section->block.next)
 552                 mono_sgen_dump_section (section, "old");
 553         /* FIXME: dump pinned sections, too */
 554 }
 555
 556 static gint64
 557 major_get_used_size (void)
 558 {
 559         gint64 tot = 0;
 560         GCMemSection *section;
 561         for (section = section_list; section; section = section->block.next) {
 562                 /* this is approximate... */
 563                 tot += section->next_data - section->data;
 564         }
 565         return tot;
 566 }
 567
 568 /* only valid during minor collections */
 569 static int old_num_major_sections;
 570
 571 static void
 572 major_start_nursery_collection (void)
 573 {
 574         old_num_major_sections = num_major_sections;
 575
 576         if (!to_space_section) {
 577                 new_to_space_section ();
 578         } else {
 579                 /* we might have done degraded allocation since the
 580                    last collection */
 581                 g_assert (to_space_bumper <= to_space_section->next_data);
 582                 to_space_bumper = to_space_section->next_data;
 583
 584                 to_space_section->is_to_space = TRUE;
 585         }
 586 }
 587
 588 static void
 589 major_finish_nursery_collection (void)
 590 {
 591         GCMemSection *section;
 592         int sections_alloced;
 593
 594         to_space_set_next_data ();
 595
 596         for (section = section_list; section; section = section->block.next)
 597                 section->is_to_space = FALSE;
 598
 599         sections_alloced = num_major_sections - old_num_major_sections;
 600         mono_sgen_register_major_sections_alloced (sections_alloced);
 601 }
 602
 603 static void
 604 major_finish_major_collection (void)
 605 {
 606 }
 607
 608 static gboolean
 609 major_ptr_is_in_non_pinned_space (char *ptr)
 610 {
 611         GCMemSection *section;
 612         for (section = section_list; section;) {
 613                 if (ptr >= section->data && ptr < section->data + section->size)
 614                         return TRUE;
 615                 section = section->block.next;
 616         }
 617         return FALSE;
 618 }
 619
 620 static void
 621 major_report_pinned_memory_usage (void)
 622 {
 623         mono_sgen_report_internal_mem_usage_full (&pinned_allocator);
 624 }
 625
 626 static int
 627 get_num_major_sections (void)
 628 {
 629         return num_major_sections;
 630 }
 631
 632 void
 633 mono_sgen_copying_init (SgenMajorCollector *collector)
 634 {
 635 #ifdef HEAVY_STATISTICS
 636         mono_counters_register ("# major copy_object() failed forwarded", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_major_copy_object_failed_forwarded);
 637         mono_counters_register ("# major copy_object() failed pinned", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_major_copy_object_failed_pinned);
 638         mono_counters_register ("# major copy_object() failed large or pinned chunk", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_major_copy_object_failed_large_pinned);
 639         mono_counters_register ("# major copy_object() failed to space", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_major_copy_object_failed_to_space);
 640 #endif
 641
 642         collector->section_size = MAJOR_SECTION_SIZE;
 643         collector->supports_cardtable = FALSE;
 644         collector->is_parallel = FALSE;
 645
 646         collector->alloc_heap = major_alloc_heap;
 647         collector->is_object_live = major_is_object_live;
 648         collector->alloc_small_pinned_obj = major_alloc_small_pinned_obj;
 649         collector->alloc_degraded = major_alloc_degraded;
 650         collector->copy_or_mark_object = major_copy_or_mark_object;
 651         collector->alloc_object = major_alloc_object;
 652         collector->free_pinned_object = free_pinned_object;
 653         collector->iterate_objects = major_iterate_objects;
 654         collector->free_non_pinned_object = major_free_non_pinned_object;
 655         collector->find_pin_queue_start_ends = major_find_pin_queue_start_ends;
 656         collector->pin_objects = major_pin_objects;
 657         collector->init_to_space = major_init_to_space;
 658         collector->sweep = major_sweep;
 659         collector->check_scan_starts = major_check_scan_starts;
 660         collector->dump_heap = major_dump_heap;
 661         collector->get_used_size = major_get_used_size;
 662         collector->start_nursery_collection = major_start_nursery_collection;
 663         collector->finish_nursery_collection = major_finish_nursery_collection;
 664         collector->finish_major_collection = major_finish_major_collection;
 665         collector->ptr_is_in_non_pinned_space = major_ptr_is_in_non_pinned_space;
 666         collector->obj_is_from_pinned_alloc = obj_is_from_pinned_alloc;
 667         collector->report_pinned_memory_usage = major_report_pinned_memory_usage;
 668         collector->get_num_major_sections = get_num_major_sections;
 669         collector->handle_gc_param = NULL;
 670         collector->print_gc_param_usage = NULL;
 671
 672         FILL_COLLECTOR_COPY_OBJECT (collector);
 673         FILL_COLLECTOR_SCAN_OBJECT (collector);
 674 }
 675
 676 #endif