1 /*
   2  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "runtime/mutexLocker.hpp"
  27 #include "utilities/decoder.hpp"
  28 #include "services/memBaseline.hpp"
  29 #include "services/memPtr.hpp"
  30 #include "services/memPtrArray.hpp"
  31 #include "services/memSnapshot.hpp"
  32 #include "services/memTracker.hpp"
  33 































































  34 
  35 bool VMMemPointerIterator::insert_record(MemPointerRecord* rec) {
  36   VMMemRegionEx new_rec;
  37   assert(rec->is_allocation_record() || rec->is_commit_record(),
  38     "Sanity check");
  39   if (MemTracker::track_callsite()) {
  40     new_rec.init((MemPointerRecordEx*)rec);
  41   } else {
  42     new_rec.init(rec);
  43   }
  44   return insert(&new_rec);
  45 }
  46 
  47 bool VMMemPointerIterator::insert_record_after(MemPointerRecord* rec) {
  48   VMMemRegionEx new_rec;
  49   assert(rec->is_allocation_record() || rec->is_commit_record(),
  50     "Sanity check");
  51   if (MemTracker::track_callsite()) {
  52     new_rec.init((MemPointerRecordEx*)rec);
  53   } else {
  54     new_rec.init(rec);
  55   }
  56   return insert_after(&new_rec);
  57 }
  58 
  59 // we don't consolidate reserved regions, since they may be categorized
  60 // in different types.
  61 bool VMMemPointerIterator::add_reserved_region(MemPointerRecord* rec) {
  62   assert(rec->is_allocation_record(), "Sanity check");
  63   VMMemRegion* cur = (VMMemRegion*)current();
  64 
  65   // we don't have anything yet
  66   if (cur == NULL) {
  67     return insert_record(rec);
  68   }
  69 
  70   assert(cur->is_reserved_region(), "Sanity check");
  71   // duplicated records
  72   if (cur->is_same_region(rec)) {
  73     return true;
  74   }
  75   assert(cur->base() > rec->addr(), "Just check: locate()");
  76   assert(rec->addr() + rec->size() <= cur->base(), "Can not overlap");
  77   return insert_record(rec);
  78 }
  79 
  80 // we do consolidate committed regions
  81 bool VMMemPointerIterator::add_committed_region(MemPointerRecord* rec) {
  82   assert(rec->is_commit_record(), "Sanity check");
  83   VMMemRegion* cur;
  84   cur = (VMMemRegion*)current();
  85   assert(cur->is_reserved_region() && cur->contains_region(rec),
  86     "Sanity check");
  87 
  88   // thread's native stack is always marked as "committed", ignore
  89   // the "commit" operation for creating stack guard pages
  90   if (FLAGS_TO_MEMORY_TYPE(cur->flags()) == mtThreadStack &&
  91       FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
  92     return true;
  93   }
  94 
  95   cur = (VMMemRegion*)next();
  96   while (cur != NULL && cur->is_committed_region()) {

  97     // duplicated commit records
  98     if(cur->contains_region(rec)) {
  99       return true;
 100     }
 101     if (cur->base() > rec->addr()) {
 102       // committed regions can not overlap
 103       assert(rec->addr() + rec->size() <= cur->base(), "Can not overlap");
 104       if (rec->addr() + rec->size() == cur->base()) {
 105         cur->expand_region(rec->addr(), rec->size());
 106         return true;
 107       } else {
 108         return insert_record(rec);
 109       }
 110     } else if (cur->base() + cur->size() == rec->addr()) {
 111       cur->expand_region(rec->addr(), rec->size());





 112       VMMemRegion* next_reg = (VMMemRegion*)next();
 113       // see if we can consolidate next committed region
 114       if (next_reg != NULL && next_reg->is_committed_region() &&
 115         next_reg->base() == cur->base() + cur->size()) {
 116           cur->expand_region(next_reg->base(), next_reg->size());

 117           remove();
 118       }
 119       return true;



 120     }
 121     cur = (VMMemRegion*)next();
 122   }
 123   return insert_record(rec);
 124 }
 125 
 126 bool VMMemPointerIterator::remove_uncommitted_region(MemPointerRecord* rec) {
 127   assert(rec->is_uncommit_record(), "sanity check");
 128   VMMemRegion* cur;
 129   cur = (VMMemRegion*)current();
 130   assert(cur->is_reserved_region() && cur->contains_region(rec),
 131     "Sanity check");
 132   // thread's native stack is always marked as "committed", ignore
 133   // the "commit" operation for creating stack guard pages
 134   if (FLAGS_TO_MEMORY_TYPE(cur->flags()) == mtThreadStack &&
 135       FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
 136     return true;
 137   }
 138 
 139   cur = (VMMemRegion*)next();
 140   while (cur != NULL && cur->is_committed_region()) {
 141     // region already uncommitted, must be due to duplicated record
 142     if (cur->addr() >= rec->addr() + rec->size()) {
 143       break;
 144     } else if (cur->contains_region(rec)) {
 145       // uncommit whole region
 146       if (cur->is_same_region(rec)) {
 147         remove();
 148         break;
 149       } else if (rec->addr() == cur->addr() ||
 150         rec->addr() + rec->size() == cur->addr() + cur->size()) {
 151         // uncommitted from either end of current memory region.
 152         cur->exclude_region(rec->addr(), rec->size());
 153         break;
 154       } else { // split the committed region and release the middle
 155         address high_addr = cur->addr() + cur->size();
 156         size_t sz = high_addr - rec->addr();
 157         cur->exclude_region(rec->addr(), sz);
 158         sz = high_addr - (rec->addr() + rec->size());
 159         if (MemTracker::track_callsite()) {
 160           MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
 161              ((VMMemRegionEx*)cur)->pc());
 162           return insert_record_after(&tmp);
 163         } else {
 164           MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
 165           return insert_record_after(&tmp);
 166         }
 167       }
 168     }
 169     cur = (VMMemRegion*)next();
 170   }
 171 
 172   // we may not find committed record due to duplicated records
 173   return true;
 174 }
 175 
 176 bool VMMemPointerIterator::remove_released_region(MemPointerRecord* rec) {
 177   assert(rec->is_deallocation_record(), "Sanity check");
 178   VMMemRegion* cur = (VMMemRegion*)current();
 179   assert(cur->is_reserved_region() && cur->contains_region(rec),
 180     "Sanity check");
 181 #ifdef ASSERT
 182   VMMemRegion* next_reg = (VMMemRegion*)peek_next();
 183   // should not have any committed memory in this reserved region
 184   assert(next_reg == NULL || !next_reg->is_committed_region(), "Sanity check");
 185 #endif
 186   if (rec->is_same_region(cur)) {
 187     remove();
 188   } else if (rec->addr() == cur->addr() ||
 189     rec->addr() + rec->size() == cur->addr() + cur->size()) {
 190     // released region is at either end of this region
 191     cur->exclude_region(rec->addr(), rec->size());
 192   } else { // split the reserved region and release the middle
 193     address high_addr = cur->addr() + cur->size();
 194     size_t sz = high_addr - rec->addr();
 195     cur->exclude_region(rec->addr(), sz);
 196     sz = high_addr - rec->addr() - rec->size();
 197     if (MemTracker::track_callsite()) {
 198       MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
 199         ((VMMemRegionEx*)cur)->pc());
 200       return insert_reserved_region(&tmp);
 201     } else {
 202       MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
 203       return insert_reserved_region(&tmp);
 204     }
 205   }
 206   return true;
 207 }
 208 
 209 bool VMMemPointerIterator::insert_reserved_region(MemPointerRecord* rec) {
 210   // skip all 'commit' records associated with previous reserved region
 211   VMMemRegion* p = (VMMemRegion*)next();
 212   while (p != NULL && p->is_committed_region() &&
 213          p->base() + p->size() < rec->addr()) {
 214     p = (VMMemRegion*)next();
 215   }
 216   return insert_record(rec);
 217 }
 218 
 219 bool VMMemPointerIterator::split_reserved_region(VMMemRegion* rgn, address new_rgn_addr, size_t new_rgn_size) {
 220   assert(rgn->contains_region(new_rgn_addr, new_rgn_size), "Not fully contained");
 221   address pc = (MemTracker::track_callsite() ? ((VMMemRegionEx*)rgn)->pc() : NULL);
 222   if (rgn->base() == new_rgn_addr) { // new region is at the beginning of the region
 223     size_t sz = rgn->size() - new_rgn_size;
 224     // the original region becomes 'new' region
 225     rgn->exclude_region(new_rgn_addr + new_rgn_size, sz);
 226      // remaining becomes next region
 227     MemPointerRecordEx next_rgn(new_rgn_addr + new_rgn_size, rgn->flags(), sz, pc);
 228     return insert_reserved_region(&next_rgn);
 229   } else if (rgn->base() + rgn->size() == new_rgn_addr + new_rgn_size) {
 230     rgn->exclude_region(new_rgn_addr, new_rgn_size);
 231     MemPointerRecordEx next_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
 232     return insert_reserved_region(&next_rgn);
 233   } else {
 234     // the orginal region will be split into three
 235     address rgn_high_addr = rgn->base() + rgn->size();
 236     // first region
 237     rgn->exclude_region(new_rgn_addr, (rgn_high_addr - new_rgn_addr));
 238     // the second region is the new region
 239     MemPointerRecordEx new_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
 240     if (!insert_reserved_region(&new_rgn)) return false;
 241     // the remaining region
 242     MemPointerRecordEx rem_rgn(new_rgn_addr + new_rgn_size, rgn->flags(),
 243       rgn_high_addr - (new_rgn_addr + new_rgn_size), pc);
 244     return insert_reserved_region(&rem_rgn);
 245   }
 246 }
 247 
 248 static int sort_in_seq_order(const void* p1, const void* p2) {
 249   assert(p1 != NULL && p2 != NULL, "Sanity check");
 250   const MemPointerRecord* mp1 = (MemPointerRecord*)p1;
 251   const MemPointerRecord* mp2 = (MemPointerRecord*)p2;
 252   return (mp1->seq() - mp2->seq());
 253 }
 254 
 255 bool StagingArea::init() {
 256   if (MemTracker::track_callsite()) {
 257     _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
 258     _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
 259   } else {
 260     _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
 261     _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
 262   }
 263 
 264   if (_malloc_data != NULL && _vm_data != NULL &&
 265       !_malloc_data->out_of_memory() &&
 266       !_vm_data->out_of_memory()) {
 267     return true;
 268   } else {
 269     if (_malloc_data != NULL) delete _malloc_data;
 270     if (_vm_data != NULL) delete _vm_data;
 271     _malloc_data = NULL;
 272     _vm_data = NULL;
 273     return false;
 274   }
 275 }
 276 
 277 
 278 VMRecordIterator StagingArea::virtual_memory_record_walker() {
 279   MemPointerArray* arr = vm_data();
 280   // sort into seq number order
 281   arr->sort((FN_SORT)sort_in_seq_order);
 282   return VMRecordIterator(arr);
 283 }
 284 
 285 
 286 MemSnapshot::MemSnapshot() {
 287   if (MemTracker::track_callsite()) {
 288     _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecordEx>();
 289     _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegionEx>(64, true);
 290   } else {
 291     _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecord>();
 292     _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegion>(64, true);
 293   }
 294 
 295   _staging_area.init();
 296   _lock = new (std::nothrow) Mutex(Monitor::max_nonleaf - 1, "memSnapshotLock");
 297   NOT_PRODUCT(_untracked_count = 0;)
 298 }
 299 
 300 MemSnapshot::~MemSnapshot() {
 301   assert(MemTracker::shutdown_in_progress(), "native memory tracking still on");
 302   {
 303     MutexLockerEx locker(_lock);
 304     if (_alloc_ptrs != NULL) {
 305       delete _alloc_ptrs;
 306       _alloc_ptrs = NULL;
 307     }
 308 
 309     if (_vm_ptrs != NULL) {
 310       delete _vm_ptrs;
 311       _vm_ptrs = NULL;
 312     }
 313   }
 314 
 315   if (_lock != NULL) {
 316     delete _lock;
 317     _lock = NULL;
 318   }
 319 }
 320 
 321 void MemSnapshot::copy_pointer(MemPointerRecord* dest, const MemPointerRecord* src) {
 322   assert(dest != NULL && src != NULL, "Just check");
 323   assert(dest->addr() == src->addr(), "Just check");
 324 
 325   MEMFLAGS flags = dest->flags();
 326 
 327   if (MemTracker::track_callsite()) {
 328     *(MemPointerRecordEx*)dest = *(MemPointerRecordEx*)src;
 329   } else {
 330     *dest = *src;
 331   }
 332 }
 333 
 334 
 335 // merge a per-thread memory recorder to the staging area
 336 bool MemSnapshot::merge(MemRecorder* rec) {
 337   assert(rec != NULL && !rec->out_of_memory(), "Just check");
 338 
 339   SequencedRecordIterator itr(rec->pointer_itr());
 340 
 341   MutexLockerEx lock(_lock, true);
 342   MemPointerIterator malloc_staging_itr(_staging_area.malloc_data());
 343   MemPointerRecord *p1, *p2;
 344   p1 = (MemPointerRecord*) itr.current();
 345   while (p1 != NULL) {
 346     if (p1->is_vm_pointer()) {
 347       // we don't do anything with virtual memory records during merge
 348       if (!_staging_area.vm_data()->append(p1)) {
 349         return false;
 350       }
 351     } else {
 352       // locate matched record and/or also position the iterator to proper
 353       // location for this incoming record.
 354       p2 = (MemPointerRecord*)malloc_staging_itr.locate(p1->addr());
 355       // we have not seen this memory block, so just add to staging area
 356       if (p2 == NULL) {
 357         if (!malloc_staging_itr.insert(p1)) {
 358           return false;
 359         }
 360       } else if (p1->addr() == p2->addr()) {
 361         MemPointerRecord* staging_next = (MemPointerRecord*)malloc_staging_itr.peek_next();
 362         // a memory block can have many tagging records, find right one to replace or
 363         // right position to insert
 364         while (staging_next != NULL && staging_next->addr() == p1->addr()) {
 365           if ((staging_next->flags() & MemPointerRecord::tag_masks) <=
 366             (p1->flags() & MemPointerRecord::tag_masks)) {
 367             p2 = (MemPointerRecord*)malloc_staging_itr.next();
 368             staging_next = (MemPointerRecord*)malloc_staging_itr.peek_next();
 369           } else {
 370             break;
 371           }
 372         }
 373         int df = (p1->flags() & MemPointerRecord::tag_masks) -
 374           (p2->flags() & MemPointerRecord::tag_masks);
 375         if (df == 0) {
 376           assert(p1->seq() > 0, "not sequenced");
 377           assert(p2->seq() > 0, "not sequenced");
 378           if (p1->seq() > p2->seq()) {
 379             copy_pointer(p2, p1);
 380           }
 381         } else if (df < 0) {
 382           if (!malloc_staging_itr.insert(p1)) {
 383             return false;
 384           }
 385         } else {
 386           if (!malloc_staging_itr.insert_after(p1)) {
 387             return false;
 388           }
 389         }
 390       } else if (p1->addr() < p2->addr()) {
 391         if (!malloc_staging_itr.insert(p1)) {
 392           return false;
 393         }
 394       } else {
 395         if (!malloc_staging_itr.insert_after(p1)) {
 396           return false;
 397         }
 398       }
 399     }
 400     p1 = (MemPointerRecord*)itr.next();
 401   }
 402   NOT_PRODUCT(void check_staging_data();)
 403   return true;
 404 }
 405 
 406 
 407 
 408 // promote data to next generation
 409 bool MemSnapshot::promote() {
 410   assert(_alloc_ptrs != NULL && _vm_ptrs != NULL, "Just check");
 411   assert(_staging_area.malloc_data() != NULL && _staging_area.vm_data() != NULL,
 412          "Just check");
 413   MutexLockerEx lock(_lock, true);
 414 
 415   MallocRecordIterator  malloc_itr = _staging_area.malloc_record_walker();
 416   bool promoted = false;
 417   if (promote_malloc_records(&malloc_itr)) {
 418     VMRecordIterator vm_itr = _staging_area.virtual_memory_record_walker();
 419     if (promote_virtual_memory_records(&vm_itr)) {
 420       promoted = true;
 421     }
 422   }
 423 
 424   NOT_PRODUCT(check_malloc_pointers();)
 425   _staging_area.clear();
 426   return promoted;
 427 }
 428 
 429 bool MemSnapshot::promote_malloc_records(MemPointerArrayIterator* itr) {
 430   MemPointerIterator malloc_snapshot_itr(_alloc_ptrs);
 431   MemPointerRecord* new_rec = (MemPointerRecord*)itr->current();
 432   MemPointerRecord* matched_rec;
 433   while (new_rec != NULL) {
 434     matched_rec = (MemPointerRecord*)malloc_snapshot_itr.locate(new_rec->addr());
 435     // found matched memory block
 436     if (matched_rec != NULL && new_rec->addr() == matched_rec->addr()) {
 437       // snapshot already contains 'live' records
 438       assert(matched_rec->is_allocation_record() || matched_rec->is_arena_size_record(),
 439              "Sanity check");
 440       // update block states
 441       if (new_rec->is_allocation_record() || new_rec->is_arena_size_record()) {
 442         copy_pointer(matched_rec, new_rec);
 443       } else {
 444         // a deallocation record
 445         assert(new_rec->is_deallocation_record(), "Sanity check");
 446         // an arena record can be followed by a size record, we need to remove both
 447         if (matched_rec->is_arena_record()) {
 448           MemPointerRecord* next = (MemPointerRecord*)malloc_snapshot_itr.peek_next();
 449           if (next->is_arena_size_record()) {
 450             // it has to match the arena record
 451             assert(next->is_size_record_of_arena(matched_rec), "Sanity check");
 452             malloc_snapshot_itr.remove();
 453           }
 454         }
 455         // the memory is deallocated, remove related record(s)
 456         malloc_snapshot_itr.remove();
 457       }
 458     } else {
 459       // it is a new record, insert into snapshot
 460       if (new_rec->is_arena_size_record()) {
 461         MemPointerRecord* prev = (MemPointerRecord*)malloc_snapshot_itr.peek_prev();
 462         if (prev == NULL || !prev->is_arena_record() || !new_rec->is_size_record_of_arena(prev)) {
 463           // no matched arena record, ignore the size record
 464           new_rec = NULL;
 465         }
 466       }
 467       // only 'live' record can go into snapshot
 468       if (new_rec != NULL) {
 469         if  (new_rec->is_allocation_record() || new_rec->is_arena_size_record()) {
 470           if (matched_rec != NULL && new_rec->addr() > matched_rec->addr()) {
 471             if (!malloc_snapshot_itr.insert_after(new_rec)) {
 472               return false;
 473             }
 474           } else {
 475             if (!malloc_snapshot_itr.insert(new_rec)) {
 476               return false;
 477             }
 478           }
 479         }
 480 #ifndef PRODUCT
 481         else if (!has_allocation_record(new_rec->addr())) {
 482           // NMT can not track some startup memory, which is allocated before NMT is on
 483           _untracked_count ++;
 484         }
 485 #endif
 486       }
 487     }
 488     new_rec = (MemPointerRecord*)itr->next();
 489   }
 490   return true;
 491 }
 492 
 493 bool MemSnapshot::promote_virtual_memory_records(MemPointerArrayIterator* itr) {
 494   VMMemPointerIterator vm_snapshot_itr(_vm_ptrs);
 495   MemPointerRecord* new_rec = (MemPointerRecord*)itr->current();
 496   VMMemRegion*  reserved_rec;
 497   while (new_rec != NULL) {
 498     assert(new_rec->is_vm_pointer(), "Sanity check");
 499 
 500     // locate a reserved region that contains the specified address, or
 501     // the nearest reserved region has base address just above the specified
 502     // address
 503     reserved_rec = (VMMemRegion*)vm_snapshot_itr.locate(new_rec->addr());
 504     if (reserved_rec != NULL && reserved_rec->contains_region(new_rec)) {
 505       // snapshot can only have 'live' records
 506       assert(reserved_rec->is_reserved_region(), "Sanity check");
 507       if (new_rec->is_allocation_record()) {
 508         if (!reserved_rec->is_same_region(new_rec)) {
 509           // only deal with split a bigger reserved region into smaller regions.
 510           // So far, CDS is the only use case.
 511           if (!vm_snapshot_itr.split_reserved_region(reserved_rec, new_rec->addr(), new_rec->size())) {
 512             return false;
 513           }
 514         }
 515       } else if (new_rec->is_uncommit_record()) {
 516         if (!vm_snapshot_itr.remove_uncommitted_region(new_rec)) {
 517           return false;
 518         }
 519       } else if (new_rec->is_commit_record()) {
 520         // insert or expand existing committed region to cover this
 521         // newly committed region
 522         if (!vm_snapshot_itr.add_committed_region(new_rec)) {
 523           return false;
 524         }
 525       } else if (new_rec->is_deallocation_record()) {
 526         // release part or all memory region
 527         if (!vm_snapshot_itr.remove_released_region(new_rec)) {
 528           return false;
 529         }
 530       } else if (new_rec->is_type_tagging_record()) {
 531         // tag this reserved virtual memory range to a memory type. Can not re-tag a memory range
 532         // to different type.
 533         assert(FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == mtNone ||
 534                FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == FLAGS_TO_MEMORY_TYPE(new_rec->flags()),
 535                "Sanity check");
 536         reserved_rec->tag(new_rec->flags());
 537     } else {
 538         ShouldNotReachHere();
 539           }
 540         } else {
 541       /*
 542        * The assertion failure indicates mis-matched virtual memory records. The likely
 543        * scenario is, that some virtual memory operations are not going through os::xxxx_memory()
 544        * api, which have to be tracked manually. (perfMemory is an example).
 545       */
 546       assert(new_rec->is_allocation_record(), "Sanity check");
 547       if (!vm_snapshot_itr.add_reserved_region(new_rec)) {
 548             return false;
 549           }
 550   }
 551     new_rec = (MemPointerRecord*)itr->next();
 552   }
 553   return true;
 554 }
 555 
 556 #ifndef PRODUCT
 557 void MemSnapshot::print_snapshot_stats(outputStream* st) {
 558   st->print_cr("Snapshot:");
 559   st->print_cr("\tMalloced: %d/%d [%5.2f%%]  %dKB", _alloc_ptrs->length(), _alloc_ptrs->capacity(),
 560     (100.0 * (float)_alloc_ptrs->length()) / (float)_alloc_ptrs->capacity(), _alloc_ptrs->instance_size()/K);
 561 
 562   st->print_cr("\tVM: %d/%d [%5.2f%%] %dKB", _vm_ptrs->length(), _vm_ptrs->capacity(),
 563     (100.0 * (float)_vm_ptrs->length()) / (float)_vm_ptrs->capacity(), _vm_ptrs->instance_size()/K);
 564 
 565   st->print_cr("\tMalloc staging Area:     %d/%d [%5.2f%%] %dKB", _staging_area.malloc_data()->length(),
 566     _staging_area.malloc_data()->capacity(),
 567     (100.0 * (float)_staging_area.malloc_data()->length()) / (float)_staging_area.malloc_data()->capacity(),
 568     _staging_area.malloc_data()->instance_size()/K);
 569 
 570   st->print_cr("\tVirtual memory staging Area:     %d/%d [%5.2f%%] %dKB", _staging_area.vm_data()->length(),
 571     _staging_area.vm_data()->capacity(),
 572     (100.0 * (float)_staging_area.vm_data()->length()) / (float)_staging_area.vm_data()->capacity(),
 573     _staging_area.vm_data()->instance_size()/K);
 574 
 575   st->print_cr("\tUntracked allocation: %d", _untracked_count);
 576 }
 577 
 578 void MemSnapshot::check_malloc_pointers() {
 579   MemPointerArrayIteratorImpl mItr(_alloc_ptrs);
 580   MemPointerRecord* p = (MemPointerRecord*)mItr.current();
 581   MemPointerRecord* prev = NULL;
 582   while (p != NULL) {
 583     if (prev != NULL) {
 584       assert(p->addr() >= prev->addr(), "sorting order");
 585     }
 586     prev = p;
 587     p = (MemPointerRecord*)mItr.next();
 588   }
 589 }
 590 
 591 bool MemSnapshot::has_allocation_record(address addr) {
 592   MemPointerArrayIteratorImpl itr(_staging_area.malloc_data());
 593   MemPointerRecord* cur = (MemPointerRecord*)itr.current();
 594   while (cur != NULL) {
 595     if (cur->addr() == addr && cur->is_allocation_record()) {
 596       return true;
 597     }
 598     cur = (MemPointerRecord*)itr.next();
 599   }
 600   return false;
 601 }
 602 #endif // PRODUCT
 603 
 604 #ifdef ASSERT
 605 void MemSnapshot::check_staging_data() {
 606   MemPointerArrayIteratorImpl itr(_staging_area.malloc_data());
 607   MemPointerRecord* cur = (MemPointerRecord*)itr.current();
 608   MemPointerRecord* next = (MemPointerRecord*)itr.next();
 609   while (next != NULL) {
 610     assert((next->addr() > cur->addr()) ||
 611       ((next->flags() & MemPointerRecord::tag_masks) >
 612        (cur->flags() & MemPointerRecord::tag_masks)),
 613        "sorting order");
 614     cur = next;
 615     next = (MemPointerRecord*)itr.next();
 616   }
 617 
 618   MemPointerArrayIteratorImpl vm_itr(_staging_area.vm_data());
 619   cur = (MemPointerRecord*)vm_itr.current();
 620   while (cur != NULL) {
 621     assert(cur->is_vm_pointer(), "virtual memory pointer only");
 622     cur = (MemPointerRecord*)vm_itr.next();
 623   }
 624 }
 625 
 626 void MemSnapshot::dump_all_vm_pointers() {
 627   MemPointerArrayIteratorImpl itr(_vm_ptrs);
 628   VMMemRegion* ptr = (VMMemRegion*)itr.current();
 629   tty->print_cr("dump virtual memory pointers:");
 630   while (ptr != NULL) {
 631     if (ptr->is_committed_region()) {
 632       tty->print("\t");
 633     }
 634     tty->print("[" PTR_FORMAT " - " PTR_FORMAT "] [%x]", ptr->addr(),
 635       (ptr->addr() + ptr->size()), ptr->flags());
 636 
 637     if (MemTracker::track_callsite()) {
 638       VMMemRegionEx* ex = (VMMemRegionEx*)ptr;
 639       if (ex->pc() != NULL) {
 640         char buf[1024];
 641         if (os::dll_address_to_function_name(ex->pc(), buf, sizeof(buf), NULL)) {
 642           tty->print_cr("\t%s", buf);
 643         } else {
 644           tty->print_cr("");
 645         }
 646       }
 647     }
 648 
 649     ptr = (VMMemRegion*)itr.next();
 650   }
 651   tty->flush();
 652 }
 653 #endif // ASSERT
 654 
--- EOF ---