Fri, 09 Nov 2012 22:22:53 -0800
Merge
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 */
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"
34 #ifdef ASSERT
36 void decode_pointer_record(MemPointerRecord* rec) {
37 tty->print("Pointer: [" PTR_FORMAT " - " PTR_FORMAT "] size = %d bytes", rec->addr(),
38 rec->addr() + rec->size(), (int)rec->size());
39 tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags())));
40 if (rec->is_vm_pointer()) {
41 if (rec->is_allocation_record()) {
42 tty->print_cr(" (reserve)");
43 } else if (rec->is_commit_record()) {
44 tty->print_cr(" (commit)");
45 } else if (rec->is_uncommit_record()) {
46 tty->print_cr(" (uncommit)");
47 } else if (rec->is_deallocation_record()) {
48 tty->print_cr(" (release)");
49 } else {
50 tty->print_cr(" (tag)");
51 }
52 } else {
53 if (rec->is_arena_memory_record()) {
54 tty->print_cr(" (arena size)");
55 } else if (rec->is_allocation_record()) {
56 tty->print_cr(" (malloc)");
57 } else {
58 tty->print_cr(" (free)");
59 }
60 }
61 if (MemTracker::track_callsite()) {
62 char buf[1024];
63 address pc = ((MemPointerRecordEx*)rec)->pc();
64 if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) {
65 tty->print_cr("\tfrom %s", buf);
66 } else {
67 tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc);
68 }
69 }
70 }
72 void decode_vm_region_record(VMMemRegion* rec) {
73 tty->print("VM Region [" PTR_FORMAT " - " PTR_FORMAT "]", rec->addr(),
74 rec->addr() + rec->size());
75 tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags())));
76 if (rec->is_allocation_record()) {
77 tty->print_cr(" (reserved)");
78 } else if (rec->is_commit_record()) {
79 tty->print_cr(" (committed)");
80 } else {
81 ShouldNotReachHere();
82 }
83 if (MemTracker::track_callsite()) {
84 char buf[1024];
85 address pc = ((VMMemRegionEx*)rec)->pc();
86 if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) {
87 tty->print_cr("\tfrom %s", buf);
88 } else {
89 tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc);
90 }
92 }
93 }
95 #endif
98 bool VMMemPointerIterator::insert_record(MemPointerRecord* rec) {
99 VMMemRegionEx new_rec;
100 assert(rec->is_allocation_record() || rec->is_commit_record(),
101 "Sanity check");
102 if (MemTracker::track_callsite()) {
103 new_rec.init((MemPointerRecordEx*)rec);
104 } else {
105 new_rec.init(rec);
106 }
107 return insert(&new_rec);
108 }
110 bool VMMemPointerIterator::insert_record_after(MemPointerRecord* rec) {
111 VMMemRegionEx new_rec;
112 assert(rec->is_allocation_record() || rec->is_commit_record(),
113 "Sanity check");
114 if (MemTracker::track_callsite()) {
115 new_rec.init((MemPointerRecordEx*)rec);
116 } else {
117 new_rec.init(rec);
118 }
119 return insert_after(&new_rec);
120 }
122 // we don't consolidate reserved regions, since they may be categorized
123 // in different types.
124 bool VMMemPointerIterator::add_reserved_region(MemPointerRecord* rec) {
125 assert(rec->is_allocation_record(), "Sanity check");
126 VMMemRegion* reserved_region = (VMMemRegion*)current();
128 // we don't have anything yet
129 if (reserved_region == NULL) {
130 return insert_record(rec);
131 }
133 assert(reserved_region->is_reserved_region(), "Sanity check");
134 // duplicated records
135 if (reserved_region->is_same_region(rec)) {
136 return true;
137 }
138 // Overlapping stack regions indicate that a JNI thread failed to
139 // detach from the VM before exiting. This leaks the JavaThread object.
140 if (CheckJNICalls) {
141 guarantee(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) != mtThreadStack ||
142 !reserved_region->overlaps_region(rec),
143 "Attached JNI thread exited without being detached");
144 }
145 // otherwise, we should not have overlapping reserved regions
146 assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack ||
147 reserved_region->base() > rec->addr(), "Just check: locate()");
148 assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack ||
149 !reserved_region->overlaps_region(rec), "overlapping reserved regions");
151 return insert_record(rec);
152 }
154 // we do consolidate committed regions
155 bool VMMemPointerIterator::add_committed_region(MemPointerRecord* rec) {
156 assert(rec->is_commit_record(), "Sanity check");
157 VMMemRegion* reserved_rgn = (VMMemRegion*)current();
158 assert(reserved_rgn->is_reserved_region() && reserved_rgn->contains_region(rec),
159 "Sanity check");
161 // thread's native stack is always marked as "committed", ignore
162 // the "commit" operation for creating stack guard pages
163 if (FLAGS_TO_MEMORY_TYPE(reserved_rgn->flags()) == mtThreadStack &&
164 FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
165 return true;
166 }
168 // if the reserved region has any committed regions
169 VMMemRegion* committed_rgn = (VMMemRegion*)next();
170 while (committed_rgn != NULL && committed_rgn->is_committed_region()) {
171 // duplicated commit records
172 if(committed_rgn->contains_region(rec)) {
173 return true;
174 } else if (committed_rgn->overlaps_region(rec)) {
175 // overlaps front part
176 if (rec->addr() < committed_rgn->addr()) {
177 committed_rgn->expand_region(rec->addr(),
178 committed_rgn->addr() - rec->addr());
179 } else {
180 // overlaps tail part
181 address committed_rgn_end = committed_rgn->addr() +
182 committed_rgn->size();
183 assert(committed_rgn_end < rec->addr() + rec->size(),
184 "overlap tail part");
185 committed_rgn->expand_region(committed_rgn_end,
186 (rec->addr() + rec->size()) - committed_rgn_end);
187 }
188 } else if (committed_rgn->base() + committed_rgn->size() == rec->addr()) {
189 // adjunct each other
190 committed_rgn->expand_region(rec->addr(), rec->size());
191 VMMemRegion* next_reg = (VMMemRegion*)next();
192 // see if we can consolidate next committed region
193 if (next_reg != NULL && next_reg->is_committed_region() &&
194 next_reg->base() == committed_rgn->base() + committed_rgn->size()) {
195 committed_rgn->expand_region(next_reg->base(), next_reg->size());
196 // delete merged region
197 remove();
198 }
199 return true;
200 } else if (committed_rgn->base() > rec->addr()) {
201 // found the location, insert this committed region
202 return insert_record(rec);
203 }
204 committed_rgn = (VMMemRegion*)next();
205 }
206 return insert_record(rec);
207 }
209 bool VMMemPointerIterator::remove_uncommitted_region(MemPointerRecord* rec) {
210 assert(rec->is_uncommit_record(), "sanity check");
211 VMMemRegion* cur;
212 cur = (VMMemRegion*)current();
213 assert(cur->is_reserved_region() && cur->contains_region(rec),
214 "Sanity check");
215 // thread's native stack is always marked as "committed", ignore
216 // the "commit" operation for creating stack guard pages
217 if (FLAGS_TO_MEMORY_TYPE(cur->flags()) == mtThreadStack &&
218 FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
219 return true;
220 }
222 cur = (VMMemRegion*)next();
223 while (cur != NULL && cur->is_committed_region()) {
224 // region already uncommitted, must be due to duplicated record
225 if (cur->addr() >= rec->addr() + rec->size()) {
226 break;
227 } else if (cur->contains_region(rec)) {
228 // uncommit whole region
229 if (cur->is_same_region(rec)) {
230 remove();
231 break;
232 } else if (rec->addr() == cur->addr() ||
233 rec->addr() + rec->size() == cur->addr() + cur->size()) {
234 // uncommitted from either end of current memory region.
235 cur->exclude_region(rec->addr(), rec->size());
236 break;
237 } else { // split the committed region and release the middle
238 address high_addr = cur->addr() + cur->size();
239 size_t sz = high_addr - rec->addr();
240 cur->exclude_region(rec->addr(), sz);
241 sz = high_addr - (rec->addr() + rec->size());
242 if (MemTracker::track_callsite()) {
243 MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
244 ((VMMemRegionEx*)cur)->pc());
245 return insert_record_after(&tmp);
246 } else {
247 MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
248 return insert_record_after(&tmp);
249 }
250 }
251 }
252 cur = (VMMemRegion*)next();
253 }
255 // we may not find committed record due to duplicated records
256 return true;
257 }
259 bool VMMemPointerIterator::remove_released_region(MemPointerRecord* rec) {
260 assert(rec->is_deallocation_record(), "Sanity check");
261 VMMemRegion* cur = (VMMemRegion*)current();
262 assert(cur->is_reserved_region() && cur->contains_region(rec),
263 "Sanity check");
264 #ifdef ASSERT
265 VMMemRegion* next_reg = (VMMemRegion*)peek_next();
266 // should not have any committed memory in this reserved region
267 assert(next_reg == NULL || !next_reg->is_committed_region(), "Sanity check");
268 #endif
269 if (rec->is_same_region(cur)) {
270 remove();
271 } else if (rec->addr() == cur->addr() ||
272 rec->addr() + rec->size() == cur->addr() + cur->size()) {
273 // released region is at either end of this region
274 cur->exclude_region(rec->addr(), rec->size());
275 } else { // split the reserved region and release the middle
276 address high_addr = cur->addr() + cur->size();
277 size_t sz = high_addr - rec->addr();
278 cur->exclude_region(rec->addr(), sz);
279 sz = high_addr - rec->addr() - rec->size();
280 if (MemTracker::track_callsite()) {
281 MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
282 ((VMMemRegionEx*)cur)->pc());
283 return insert_reserved_region(&tmp);
284 } else {
285 MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
286 return insert_reserved_region(&tmp);
287 }
288 }
289 return true;
290 }
292 bool VMMemPointerIterator::insert_reserved_region(MemPointerRecord* rec) {
293 // skip all 'commit' records associated with previous reserved region
294 VMMemRegion* p = (VMMemRegion*)next();
295 while (p != NULL && p->is_committed_region() &&
296 p->base() + p->size() < rec->addr()) {
297 p = (VMMemRegion*)next();
298 }
299 return insert_record(rec);
300 }
302 bool VMMemPointerIterator::split_reserved_region(VMMemRegion* rgn, address new_rgn_addr, size_t new_rgn_size) {
303 assert(rgn->contains_region(new_rgn_addr, new_rgn_size), "Not fully contained");
304 address pc = (MemTracker::track_callsite() ? ((VMMemRegionEx*)rgn)->pc() : NULL);
305 if (rgn->base() == new_rgn_addr) { // new region is at the beginning of the region
306 size_t sz = rgn->size() - new_rgn_size;
307 // the original region becomes 'new' region
308 rgn->exclude_region(new_rgn_addr + new_rgn_size, sz);
309 // remaining becomes next region
310 MemPointerRecordEx next_rgn(new_rgn_addr + new_rgn_size, rgn->flags(), sz, pc);
311 return insert_reserved_region(&next_rgn);
312 } else if (rgn->base() + rgn->size() == new_rgn_addr + new_rgn_size) {
313 rgn->exclude_region(new_rgn_addr, new_rgn_size);
314 MemPointerRecordEx next_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
315 return insert_reserved_region(&next_rgn);
316 } else {
317 // the orginal region will be split into three
318 address rgn_high_addr = rgn->base() + rgn->size();
319 // first region
320 rgn->exclude_region(new_rgn_addr, (rgn_high_addr - new_rgn_addr));
321 // the second region is the new region
322 MemPointerRecordEx new_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
323 if (!insert_reserved_region(&new_rgn)) return false;
324 // the remaining region
325 MemPointerRecordEx rem_rgn(new_rgn_addr + new_rgn_size, rgn->flags(),
326 rgn_high_addr - (new_rgn_addr + new_rgn_size), pc);
327 return insert_reserved_region(&rem_rgn);
328 }
329 }
331 static int sort_in_seq_order(const void* p1, const void* p2) {
332 assert(p1 != NULL && p2 != NULL, "Sanity check");
333 const MemPointerRecord* mp1 = (MemPointerRecord*)p1;
334 const MemPointerRecord* mp2 = (MemPointerRecord*)p2;
335 return (mp1->seq() - mp2->seq());
336 }
338 bool StagingArea::init() {
339 if (MemTracker::track_callsite()) {
340 _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
341 _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
342 } else {
343 _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
344 _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
345 }
347 if (_malloc_data != NULL && _vm_data != NULL &&
348 !_malloc_data->out_of_memory() &&
349 !_vm_data->out_of_memory()) {
350 return true;
351 } else {
352 if (_malloc_data != NULL) delete _malloc_data;
353 if (_vm_data != NULL) delete _vm_data;
354 _malloc_data = NULL;
355 _vm_data = NULL;
356 return false;
357 }
358 }
361 VMRecordIterator StagingArea::virtual_memory_record_walker() {
362 MemPointerArray* arr = vm_data();
363 // sort into seq number order
364 arr->sort((FN_SORT)sort_in_seq_order);
365 return VMRecordIterator(arr);
366 }
369 MemSnapshot::MemSnapshot() {
370 if (MemTracker::track_callsite()) {
371 _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecordEx>();
372 _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegionEx>(64, true);
373 } else {
374 _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecord>();
375 _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegion>(64, true);
376 }
378 _staging_area.init();
379 _lock = new (std::nothrow) Mutex(Monitor::max_nonleaf - 1, "memSnapshotLock");
380 NOT_PRODUCT(_untracked_count = 0;)
381 }
383 MemSnapshot::~MemSnapshot() {
384 assert(MemTracker::shutdown_in_progress(), "native memory tracking still on");
385 {
386 MutexLockerEx locker(_lock);
387 if (_alloc_ptrs != NULL) {
388 delete _alloc_ptrs;
389 _alloc_ptrs = NULL;
390 }
392 if (_vm_ptrs != NULL) {
393 delete _vm_ptrs;
394 _vm_ptrs = NULL;
395 }
396 }
398 if (_lock != NULL) {
399 delete _lock;
400 _lock = NULL;
401 }
402 }
405 void MemSnapshot::copy_seq_pointer(MemPointerRecord* dest, const MemPointerRecord* src) {
406 assert(dest != NULL && src != NULL, "Just check");
407 assert(dest->addr() == src->addr(), "Just check");
408 assert(dest->seq() > 0 && src->seq() > 0, "not sequenced");
410 if (MemTracker::track_callsite()) {
411 *(SeqMemPointerRecordEx*)dest = *(SeqMemPointerRecordEx*)src;
412 } else {
413 *(SeqMemPointerRecord*)dest = *(SeqMemPointerRecord*)src;
414 }
415 }
417 void MemSnapshot::assign_pointer(MemPointerRecord*dest, const MemPointerRecord* src) {
418 assert(src != NULL && dest != NULL, "Just check");
419 assert(dest->seq() == 0 && src->seq() >0, "cast away sequence");
421 if (MemTracker::track_callsite()) {
422 *(MemPointerRecordEx*)dest = *(MemPointerRecordEx*)src;
423 } else {
424 *(MemPointerRecord*)dest = *(MemPointerRecord*)src;
425 }
426 }
428 // merge a recorder to the staging area
429 bool MemSnapshot::merge(MemRecorder* rec) {
430 assert(rec != NULL && !rec->out_of_memory(), "Just check");
432 SequencedRecordIterator itr(rec->pointer_itr());
434 MutexLockerEx lock(_lock, true);
435 MemPointerIterator malloc_staging_itr(_staging_area.malloc_data());
436 MemPointerRecord* incoming_rec = (MemPointerRecord*) itr.current();
437 MemPointerRecord* matched_rec;
439 while (incoming_rec != NULL) {
440 if (incoming_rec->is_vm_pointer()) {
441 // we don't do anything with virtual memory records during merge
442 if (!_staging_area.vm_data()->append(incoming_rec)) {
443 return false;
444 }
445 } else {
446 // locate matched record and/or also position the iterator to proper
447 // location for this incoming record.
448 matched_rec = (MemPointerRecord*)malloc_staging_itr.locate(incoming_rec->addr());
449 // we have not seen this memory block in this generation,
450 // so just add to staging area
451 if (matched_rec == NULL) {
452 if (!malloc_staging_itr.insert(incoming_rec)) {
453 return false;
454 }
455 } else if (incoming_rec->addr() == matched_rec->addr()) {
456 // whoever has higher sequence number wins
457 if (incoming_rec->seq() > matched_rec->seq()) {
458 copy_seq_pointer(matched_rec, incoming_rec);
459 }
460 } else if (incoming_rec->addr() < matched_rec->addr()) {
461 if (!malloc_staging_itr.insert(incoming_rec)) {
462 return false;
463 }
464 } else {
465 ShouldNotReachHere();
466 }
467 }
468 incoming_rec = (MemPointerRecord*)itr.next();
469 }
470 NOT_PRODUCT(void check_staging_data();)
471 return true;
472 }
475 // promote data to next generation
476 bool MemSnapshot::promote() {
477 assert(_alloc_ptrs != NULL && _vm_ptrs != NULL, "Just check");
478 assert(_staging_area.malloc_data() != NULL && _staging_area.vm_data() != NULL,
479 "Just check");
480 MutexLockerEx lock(_lock, true);
482 MallocRecordIterator malloc_itr = _staging_area.malloc_record_walker();
483 bool promoted = false;
484 if (promote_malloc_records(&malloc_itr)) {
485 VMRecordIterator vm_itr = _staging_area.virtual_memory_record_walker();
486 if (promote_virtual_memory_records(&vm_itr)) {
487 promoted = true;
488 }
489 }
491 NOT_PRODUCT(check_malloc_pointers();)
492 _staging_area.clear();
493 return promoted;
494 }
496 bool MemSnapshot::promote_malloc_records(MemPointerArrayIterator* itr) {
497 MemPointerIterator malloc_snapshot_itr(_alloc_ptrs);
498 MemPointerRecord* new_rec = (MemPointerRecord*)itr->current();
499 MemPointerRecord* matched_rec;
500 while (new_rec != NULL) {
501 matched_rec = (MemPointerRecord*)malloc_snapshot_itr.locate(new_rec->addr());
502 // found matched memory block
503 if (matched_rec != NULL && new_rec->addr() == matched_rec->addr()) {
504 // snapshot already contains 'live' records
505 assert(matched_rec->is_allocation_record() || matched_rec->is_arena_memory_record(),
506 "Sanity check");
507 // update block states
508 if (new_rec->is_allocation_record()) {
509 assign_pointer(matched_rec, new_rec);
510 } else if (new_rec->is_arena_memory_record()) {
511 if (new_rec->size() == 0) {
512 // remove size record once size drops to 0
513 malloc_snapshot_itr.remove();
514 } else {
515 assign_pointer(matched_rec, new_rec);
516 }
517 } else {
518 // a deallocation record
519 assert(new_rec->is_deallocation_record(), "Sanity check");
520 // an arena record can be followed by a size record, we need to remove both
521 if (matched_rec->is_arena_record()) {
522 MemPointerRecord* next = (MemPointerRecord*)malloc_snapshot_itr.peek_next();
523 if (next->is_arena_memory_record() && next->is_memory_record_of_arena(matched_rec)) {
524 malloc_snapshot_itr.remove();
525 }
526 }
527 // the memory is deallocated, remove related record(s)
528 malloc_snapshot_itr.remove();
529 }
530 } else {
531 // don't insert size 0 record
532 if (new_rec->is_arena_memory_record() && new_rec->size() == 0) {
533 new_rec = NULL;
534 }
536 if (new_rec != NULL) {
537 if (new_rec->is_allocation_record() || new_rec->is_arena_memory_record()) {
538 if (matched_rec != NULL && new_rec->addr() > matched_rec->addr()) {
539 if (!malloc_snapshot_itr.insert_after(new_rec)) {
540 return false;
541 }
542 } else {
543 if (!malloc_snapshot_itr.insert(new_rec)) {
544 return false;
545 }
546 }
547 }
548 #ifndef PRODUCT
549 else if (!has_allocation_record(new_rec->addr())) {
550 // NMT can not track some startup memory, which is allocated before NMT is on
551 _untracked_count ++;
552 }
553 #endif
554 }
555 }
556 new_rec = (MemPointerRecord*)itr->next();
557 }
558 return true;
559 }
561 bool MemSnapshot::promote_virtual_memory_records(MemPointerArrayIterator* itr) {
562 VMMemPointerIterator vm_snapshot_itr(_vm_ptrs);
563 MemPointerRecord* new_rec = (MemPointerRecord*)itr->current();
564 VMMemRegion* reserved_rec;
565 while (new_rec != NULL) {
566 assert(new_rec->is_vm_pointer(), "Sanity check");
568 // locate a reserved region that contains the specified address, or
569 // the nearest reserved region has base address just above the specified
570 // address
571 reserved_rec = (VMMemRegion*)vm_snapshot_itr.locate(new_rec->addr());
572 if (reserved_rec != NULL && reserved_rec->contains_region(new_rec)) {
573 // snapshot can only have 'live' records
574 assert(reserved_rec->is_reserved_region(), "Sanity check");
575 if (new_rec->is_allocation_record()) {
576 if (!reserved_rec->is_same_region(new_rec)) {
577 // only deal with split a bigger reserved region into smaller regions.
578 // So far, CDS is the only use case.
579 if (!vm_snapshot_itr.split_reserved_region(reserved_rec, new_rec->addr(), new_rec->size())) {
580 return false;
581 }
582 }
583 } else if (new_rec->is_uncommit_record()) {
584 if (!vm_snapshot_itr.remove_uncommitted_region(new_rec)) {
585 return false;
586 }
587 } else if (new_rec->is_commit_record()) {
588 // insert or expand existing committed region to cover this
589 // newly committed region
590 if (!vm_snapshot_itr.add_committed_region(new_rec)) {
591 return false;
592 }
593 } else if (new_rec->is_deallocation_record()) {
594 // release part or all memory region
595 if (!vm_snapshot_itr.remove_released_region(new_rec)) {
596 return false;
597 }
598 } else if (new_rec->is_type_tagging_record()) {
599 // tag this reserved virtual memory range to a memory type. Can not re-tag a memory range
600 // to different type.
601 assert(FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == mtNone ||
602 FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == FLAGS_TO_MEMORY_TYPE(new_rec->flags()),
603 "Sanity check");
604 reserved_rec->tag(new_rec->flags());
605 } else {
606 ShouldNotReachHere();
607 }
608 } else {
609 /*
610 * The assertion failure indicates mis-matched virtual memory records. The likely
611 * scenario is, that some virtual memory operations are not going through os::xxxx_memory()
612 * api, which have to be tracked manually. (perfMemory is an example).
613 */
614 assert(new_rec->is_allocation_record(), "Sanity check");
615 if (!vm_snapshot_itr.add_reserved_region(new_rec)) {
616 return false;
617 }
618 }
619 new_rec = (MemPointerRecord*)itr->next();
620 }
621 return true;
622 }
624 #ifndef PRODUCT
625 void MemSnapshot::print_snapshot_stats(outputStream* st) {
626 st->print_cr("Snapshot:");
627 st->print_cr("\tMalloced: %d/%d [%5.2f%%] %dKB", _alloc_ptrs->length(), _alloc_ptrs->capacity(),
628 (100.0 * (float)_alloc_ptrs->length()) / (float)_alloc_ptrs->capacity(), _alloc_ptrs->instance_size()/K);
630 st->print_cr("\tVM: %d/%d [%5.2f%%] %dKB", _vm_ptrs->length(), _vm_ptrs->capacity(),
631 (100.0 * (float)_vm_ptrs->length()) / (float)_vm_ptrs->capacity(), _vm_ptrs->instance_size()/K);
633 st->print_cr("\tMalloc staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.malloc_data()->length(),
634 _staging_area.malloc_data()->capacity(),
635 (100.0 * (float)_staging_area.malloc_data()->length()) / (float)_staging_area.malloc_data()->capacity(),
636 _staging_area.malloc_data()->instance_size()/K);
638 st->print_cr("\tVirtual memory staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.vm_data()->length(),
639 _staging_area.vm_data()->capacity(),
640 (100.0 * (float)_staging_area.vm_data()->length()) / (float)_staging_area.vm_data()->capacity(),
641 _staging_area.vm_data()->instance_size()/K);
643 st->print_cr("\tUntracked allocation: %d", _untracked_count);
644 }
646 void MemSnapshot::check_malloc_pointers() {
647 MemPointerArrayIteratorImpl mItr(_alloc_ptrs);
648 MemPointerRecord* p = (MemPointerRecord*)mItr.current();
649 MemPointerRecord* prev = NULL;
650 while (p != NULL) {
651 if (prev != NULL) {
652 assert(p->addr() >= prev->addr(), "sorting order");
653 }
654 prev = p;
655 p = (MemPointerRecord*)mItr.next();
656 }
657 }
659 bool MemSnapshot::has_allocation_record(address addr) {
660 MemPointerArrayIteratorImpl itr(_staging_area.malloc_data());
661 MemPointerRecord* cur = (MemPointerRecord*)itr.current();
662 while (cur != NULL) {
663 if (cur->addr() == addr && cur->is_allocation_record()) {
664 return true;
665 }
666 cur = (MemPointerRecord*)itr.next();
667 }
668 return false;
669 }
670 #endif // PRODUCT
672 #ifdef ASSERT
673 void MemSnapshot::check_staging_data() {
674 MemPointerArrayIteratorImpl itr(_staging_area.malloc_data());
675 MemPointerRecord* cur = (MemPointerRecord*)itr.current();
676 MemPointerRecord* next = (MemPointerRecord*)itr.next();
677 while (next != NULL) {
678 assert((next->addr() > cur->addr()) ||
679 ((next->flags() & MemPointerRecord::tag_masks) >
680 (cur->flags() & MemPointerRecord::tag_masks)),
681 "sorting order");
682 cur = next;
683 next = (MemPointerRecord*)itr.next();
684 }
686 MemPointerArrayIteratorImpl vm_itr(_staging_area.vm_data());
687 cur = (MemPointerRecord*)vm_itr.current();
688 while (cur != NULL) {
689 assert(cur->is_vm_pointer(), "virtual memory pointer only");
690 cur = (MemPointerRecord*)vm_itr.next();
691 }
692 }
694 void MemSnapshot::dump_all_vm_pointers() {
695 MemPointerArrayIteratorImpl itr(_vm_ptrs);
696 VMMemRegion* ptr = (VMMemRegion*)itr.current();
697 tty->print_cr("dump virtual memory pointers:");
698 while (ptr != NULL) {
699 if (ptr->is_committed_region()) {
700 tty->print("\t");
701 }
702 tty->print("[" PTR_FORMAT " - " PTR_FORMAT "] [%x]", ptr->addr(),
703 (ptr->addr() + ptr->size()), ptr->flags());
705 if (MemTracker::track_callsite()) {
706 VMMemRegionEx* ex = (VMMemRegionEx*)ptr;
707 if (ex->pc() != NULL) {
708 char buf[1024];
709 if (os::dll_address_to_function_name(ex->pc(), buf, sizeof(buf), NULL)) {
710 tty->print_cr("\t%s", buf);
711 } else {
712 tty->print_cr("");
713 }
714 }
715 }
717 ptr = (VMMemRegion*)itr.next();
718 }
719 tty->flush();
720 }
721 #endif // ASSERT