Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/services/memSnapshot.cpp

src/share/vm/services/memSnapshot.cpp

changeset 7074
833b0f92429a
parent 6680
78bbf4d43a14
child 6876
710a3c8b516e
equal deleted inserted replaced
7073:4d3a43351904 7074:833b0f92429a
1 /*
2 * Copyright (c) 2012, 2014, 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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
35
36 #ifdef ASSERT
37
38 void decode_pointer_record(MemPointerRecord* rec) {
39 tty->print("Pointer: [" PTR_FORMAT " - " PTR_FORMAT "] size = %d bytes", rec->addr(),
40 rec->addr() + rec->size(), (int)rec->size());
41 tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags())));
42 if (rec->is_vm_pointer()) {
43 if (rec->is_allocation_record()) {
44 tty->print_cr(" (reserve)");
45 } else if (rec->is_commit_record()) {
46 tty->print_cr(" (commit)");
47 } else if (rec->is_uncommit_record()) {
48 tty->print_cr(" (uncommit)");
49 } else if (rec->is_deallocation_record()) {
50 tty->print_cr(" (release)");
51 } else {
52 tty->print_cr(" (tag)");
53 }
54 } else {
55 if (rec->is_arena_memory_record()) {
56 tty->print_cr(" (arena size)");
57 } else if (rec->is_allocation_record()) {
58 tty->print_cr(" (malloc)");
59 } else {
60 tty->print_cr(" (free)");
61 }
62 }
63 if (MemTracker::track_callsite()) {
64 char buf[1024];
65 address pc = ((MemPointerRecordEx*)rec)->pc();
66 if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) {
67 tty->print_cr("\tfrom %s", buf);
68 } else {
69 tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc);
70 }
71 }
72 }
73
74 void decode_vm_region_record(VMMemRegion* rec) {
75 tty->print("VM Region [" PTR_FORMAT " - " PTR_FORMAT "]", rec->addr(),
76 rec->addr() + rec->size());
77 tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags())));
78 if (rec->is_allocation_record()) {
79 tty->print_cr(" (reserved)");
80 } else if (rec->is_commit_record()) {
81 tty->print_cr(" (committed)");
82 } else {
83 ShouldNotReachHere();
84 }
85 if (MemTracker::track_callsite()) {
86 char buf[1024];
87 address pc = ((VMMemRegionEx*)rec)->pc();
88 if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) {
89 tty->print_cr("\tfrom %s", buf);
90 } else {
91 tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc);
92 }
93
94 }
95 }
96
97 #endif
98
99
100 bool VMMemPointerIterator::insert_record(MemPointerRecord* rec) {
101 VMMemRegionEx new_rec;
102 assert(rec->is_allocation_record() || rec->is_commit_record(),
103 "Sanity check");
104 if (MemTracker::track_callsite()) {
105 new_rec.init((MemPointerRecordEx*)rec);
106 } else {
107 new_rec.init(rec);
108 }
109 return insert(&new_rec);
110 }
111
112 bool VMMemPointerIterator::insert_record_after(MemPointerRecord* rec) {
113 VMMemRegionEx new_rec;
114 assert(rec->is_allocation_record() || rec->is_commit_record(),
115 "Sanity check");
116 if (MemTracker::track_callsite()) {
117 new_rec.init((MemPointerRecordEx*)rec);
118 } else {
119 new_rec.init(rec);
120 }
121 return insert_after(&new_rec);
122 }
123
124 // we don't consolidate reserved regions, since they may be categorized
125 // in different types.
126 bool VMMemPointerIterator::add_reserved_region(MemPointerRecord* rec) {
127 assert(rec->is_allocation_record(), "Sanity check");
128 VMMemRegion* reserved_region = (VMMemRegion*)current();
129
130 // we don't have anything yet
131 if (reserved_region == NULL) {
132 return insert_record(rec);
133 }
134
135 assert(reserved_region->is_reserved_region(), "Sanity check");
136 // duplicated records
137 if (reserved_region->is_same_region(rec)) {
138 return true;
139 }
140 // Overlapping stack regions indicate that a JNI thread failed to
141 // detach from the VM before exiting. This leaks the JavaThread object.
142 if (CheckJNICalls) {
143 guarantee(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) != mtThreadStack ||
144 !reserved_region->overlaps_region(rec),
145 "Attached JNI thread exited without being detached");
146 }
147 // otherwise, we should not have overlapping reserved regions
148 assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack ||
149 reserved_region->base() > rec->addr(), "Just check: locate()");
150 assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack ||
151 !reserved_region->overlaps_region(rec), "overlapping reserved regions");
152
153 return insert_record(rec);
154 }
155
156 // we do consolidate committed regions
157 bool VMMemPointerIterator::add_committed_region(MemPointerRecord* rec) {
158 assert(rec->is_commit_record(), "Sanity check");
159 VMMemRegion* reserved_rgn = (VMMemRegion*)current();
160 assert(reserved_rgn->is_reserved_region() && reserved_rgn->contains_region(rec),
161 "Sanity check");
162
163 // thread's native stack is always marked as "committed", ignore
164 // the "commit" operation for creating stack guard pages
165 if (FLAGS_TO_MEMORY_TYPE(reserved_rgn->flags()) == mtThreadStack &&
166 FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
167 return true;
168 }
169
170 // if the reserved region has any committed regions
171 VMMemRegion* committed_rgn = (VMMemRegion*)next();
172 while (committed_rgn != NULL && committed_rgn->is_committed_region()) {
173 // duplicated commit records
174 if(committed_rgn->contains_region(rec)) {
175 return true;
176 } else if (committed_rgn->overlaps_region(rec)) {
177 // overlaps front part
178 if (rec->addr() < committed_rgn->addr()) {
179 committed_rgn->expand_region(rec->addr(),
180 committed_rgn->addr() - rec->addr());
181 } else {
182 // overlaps tail part
183 address committed_rgn_end = committed_rgn->addr() +
184 committed_rgn->size();
185 assert(committed_rgn_end < rec->addr() + rec->size(),
186 "overlap tail part");
187 committed_rgn->expand_region(committed_rgn_end,
188 (rec->addr() + rec->size()) - committed_rgn_end);
189 }
190 } else if (committed_rgn->base() + committed_rgn->size() == rec->addr()) {
191 // adjunct each other
192 committed_rgn->expand_region(rec->addr(), rec->size());
193 VMMemRegion* next_reg = (VMMemRegion*)next();
194 // see if we can consolidate next committed region
195 if (next_reg != NULL && next_reg->is_committed_region() &&
196 next_reg->base() == committed_rgn->base() + committed_rgn->size()) {
197 committed_rgn->expand_region(next_reg->base(), next_reg->size());
198 // delete merged region
199 remove();
200 }
201 return true;
202 } else if (committed_rgn->base() > rec->addr()) {
203 // found the location, insert this committed region
204 return insert_record(rec);
205 }
206 committed_rgn = (VMMemRegion*)next();
207 }
208 return insert_record(rec);
209 }
210
211 bool VMMemPointerIterator::remove_uncommitted_region(MemPointerRecord* rec) {
212 assert(rec->is_uncommit_record(), "sanity check");
213 VMMemRegion* cur;
214 cur = (VMMemRegion*)current();
215 assert(cur->is_reserved_region() && cur->contains_region(rec),
216 "Sanity check");
217 // thread's native stack is always marked as "committed", ignore
218 // the "commit" operation for creating stack guard pages
219 if (FLAGS_TO_MEMORY_TYPE(cur->flags()) == mtThreadStack &&
220 FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
221 return true;
222 }
223
224 cur = (VMMemRegion*)next();
225 while (cur != NULL && cur->is_committed_region()) {
226 // region already uncommitted, must be due to duplicated record
227 if (cur->addr() >= rec->addr() + rec->size()) {
228 break;
229 } else if (cur->contains_region(rec)) {
230 // uncommit whole region
231 if (cur->is_same_region(rec)) {
232 remove();
233 break;
234 } else if (rec->addr() == cur->addr() ||
235 rec->addr() + rec->size() == cur->addr() + cur->size()) {
236 // uncommitted from either end of current memory region.
237 cur->exclude_region(rec->addr(), rec->size());
238 break;
239 } else { // split the committed region and release the middle
240 address high_addr = cur->addr() + cur->size();
241 size_t sz = high_addr - rec->addr();
242 cur->exclude_region(rec->addr(), sz);
243 sz = high_addr - (rec->addr() + rec->size());
244 if (MemTracker::track_callsite()) {
245 MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
246 ((VMMemRegionEx*)cur)->pc());
247 return insert_record_after(&tmp);
248 } else {
249 MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
250 return insert_record_after(&tmp);
251 }
252 }
253 }
254 cur = (VMMemRegion*)next();
255 }
256
257 // we may not find committed record due to duplicated records
258 return true;
259 }
260
261 bool VMMemPointerIterator::remove_released_region(MemPointerRecord* rec) {
262 assert(rec->is_deallocation_record(), "Sanity check");
263 VMMemRegion* cur = (VMMemRegion*)current();
264 assert(cur->is_reserved_region() && cur->contains_region(rec),
265 "Sanity check");
266 if (rec->is_same_region(cur)) {
267
268 // In snapshot, the virtual memory records are sorted in following orders:
269 // 1. virtual memory's base address
270 // 2. virtual memory reservation record, followed by commit records within this reservation.
271 // The commit records are also in base address order.
272 // When a reserved region is released, we want to remove the reservation record and all
273 // commit records following it.
274 #ifdef ASSERT
275 address low_addr = cur->addr();
276 address high_addr = low_addr + cur->size();
277 #endif
278 // remove virtual memory reservation record
279 remove();
280 // remove committed regions within above reservation
281 VMMemRegion* next_region = (VMMemRegion*)current();
282 while (next_region != NULL && next_region->is_committed_region()) {
283 assert(next_region->addr() >= low_addr &&
284 next_region->addr() + next_region->size() <= high_addr,
285 "Range check");
286 remove();
287 next_region = (VMMemRegion*)current();
288 }
289 } else if (rec->addr() == cur->addr() ||
290 rec->addr() + rec->size() == cur->addr() + cur->size()) {
291 // released region is at either end of this region
292 cur->exclude_region(rec->addr(), rec->size());
293 assert(check_reserved_region(), "Integrity check");
294 } else { // split the reserved region and release the middle
295 address high_addr = cur->addr() + cur->size();
296 size_t sz = high_addr - rec->addr();
297 cur->exclude_region(rec->addr(), sz);
298 sz = high_addr - rec->addr() - rec->size();
299 if (MemTracker::track_callsite()) {
300 MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
301 ((VMMemRegionEx*)cur)->pc());
302 bool ret = insert_reserved_region(&tmp);
303 assert(!ret || check_reserved_region(), "Integrity check");
304 return ret;
305 } else {
306 MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
307 bool ret = insert_reserved_region(&tmp);
308 assert(!ret || check_reserved_region(), "Integrity check");
309 return ret;
310 }
311 }
312 return true;
313 }
314
315 bool VMMemPointerIterator::insert_reserved_region(MemPointerRecord* rec) {
316 // skip all 'commit' records associated with previous reserved region
317 VMMemRegion* p = (VMMemRegion*)next();
318 while (p != NULL && p->is_committed_region() &&
319 p->base() + p->size() < rec->addr()) {
320 p = (VMMemRegion*)next();
321 }
322 return insert_record(rec);
323 }
324
325 bool VMMemPointerIterator::split_reserved_region(VMMemRegion* rgn, address new_rgn_addr, size_t new_rgn_size) {
326 assert(rgn->contains_region(new_rgn_addr, new_rgn_size), "Not fully contained");
327 address pc = (MemTracker::track_callsite() ? ((VMMemRegionEx*)rgn)->pc() : NULL);
328 if (rgn->base() == new_rgn_addr) { // new region is at the beginning of the region
329 size_t sz = rgn->size() - new_rgn_size;
330 // the original region becomes 'new' region
331 rgn->exclude_region(new_rgn_addr + new_rgn_size, sz);
332 // remaining becomes next region
333 MemPointerRecordEx next_rgn(new_rgn_addr + new_rgn_size, rgn->flags(), sz, pc);
334 return insert_reserved_region(&next_rgn);
335 } else if (rgn->base() + rgn->size() == new_rgn_addr + new_rgn_size) {
336 rgn->exclude_region(new_rgn_addr, new_rgn_size);
337 MemPointerRecordEx next_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
338 return insert_reserved_region(&next_rgn);
339 } else {
340 // the orginal region will be split into three
341 address rgn_high_addr = rgn->base() + rgn->size();
342 // first region
343 rgn->exclude_region(new_rgn_addr, (rgn_high_addr - new_rgn_addr));
344 // the second region is the new region
345 MemPointerRecordEx new_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
346 if (!insert_reserved_region(&new_rgn)) return false;
347 // the remaining region
348 MemPointerRecordEx rem_rgn(new_rgn_addr + new_rgn_size, rgn->flags(),
349 rgn_high_addr - (new_rgn_addr + new_rgn_size), pc);
350 return insert_reserved_region(&rem_rgn);
351 }
352 }
353
354 static int sort_in_seq_order(const void* p1, const void* p2) {
355 assert(p1 != NULL && p2 != NULL, "Sanity check");
356 const MemPointerRecord* mp1 = (MemPointerRecord*)p1;
357 const MemPointerRecord* mp2 = (MemPointerRecord*)p2;
358 return (mp1->seq() - mp2->seq());
359 }
360
361 bool StagingArea::init() {
362 if (MemTracker::track_callsite()) {
363 _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
364 _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
365 } else {
366 _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
367 _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
368 }
369
370 if (_malloc_data != NULL && _vm_data != NULL &&
371 !_malloc_data->out_of_memory() &&
372 !_vm_data->out_of_memory()) {
373 return true;
374 } else {
375 if (_malloc_data != NULL) delete _malloc_data;
376 if (_vm_data != NULL) delete _vm_data;
377 _malloc_data = NULL;
378 _vm_data = NULL;
379 return false;
380 }
381 }
382
383
384 VMRecordIterator StagingArea::virtual_memory_record_walker() {
385 MemPointerArray* arr = vm_data();
386 // sort into seq number order
387 arr->sort((FN_SORT)sort_in_seq_order);
388 return VMRecordIterator(arr);
389 }
390
391
392 MemSnapshot::MemSnapshot() {
393 if (MemTracker::track_callsite()) {
394 _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecordEx>();
395 _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegionEx>(64, true);
396 } else {
397 _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecord>();
398 _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegion>(64, true);
399 }
400
401 _staging_area.init();
402 _lock = new (std::nothrow) Mutex(Monitor::max_nonleaf - 1, "memSnapshotLock");
403 NOT_PRODUCT(_untracked_count = 0;)
404 _number_of_classes = 0;
405 }
406
407 MemSnapshot::~MemSnapshot() {
408 assert(MemTracker::shutdown_in_progress(), "native memory tracking still on");
409 {
410 MutexLockerEx locker(_lock);
411 if (_alloc_ptrs != NULL) {
412 delete _alloc_ptrs;
413 _alloc_ptrs = NULL;
414 }
415
416 if (_vm_ptrs != NULL) {
417 delete _vm_ptrs;
418 _vm_ptrs = NULL;
419 }
420 }
421
422 if (_lock != NULL) {
423 delete _lock;
424 _lock = NULL;
425 }
426 }
427
428
429 void MemSnapshot::copy_seq_pointer(MemPointerRecord* dest, const MemPointerRecord* src) {
430 assert(dest != NULL && src != NULL, "Just check");
431 assert(dest->addr() == src->addr(), "Just check");
432 assert(dest->seq() > 0 && src->seq() > 0, "not sequenced");
433
434 if (MemTracker::track_callsite()) {
435 *(SeqMemPointerRecordEx*)dest = *(SeqMemPointerRecordEx*)src;
436 } else {
437 *(SeqMemPointerRecord*)dest = *(SeqMemPointerRecord*)src;
438 }
439 }
440
441 void MemSnapshot::assign_pointer(MemPointerRecord*dest, const MemPointerRecord* src) {
442 assert(src != NULL && dest != NULL, "Just check");
443 assert(dest->seq() == 0 && src->seq() >0, "cast away sequence");
444
445 if (MemTracker::track_callsite()) {
446 *(MemPointerRecordEx*)dest = *(MemPointerRecordEx*)src;
447 } else {
448 *(MemPointerRecord*)dest = *(MemPointerRecord*)src;
449 }
450 }
451
452 // merge a recorder to the staging area
453 bool MemSnapshot::merge(MemRecorder* rec) {
454 assert(rec != NULL && !rec->out_of_memory(), "Just check");
455
456 SequencedRecordIterator itr(rec->pointer_itr());
457
458 MutexLockerEx lock(_lock, true);
459 MemPointerIterator malloc_staging_itr(_staging_area.malloc_data());
460 MemPointerRecord* incoming_rec = (MemPointerRecord*) itr.current();
461 MemPointerRecord* matched_rec;
462
463 while (incoming_rec != NULL) {
464 if (incoming_rec->is_vm_pointer()) {
465 // we don't do anything with virtual memory records during merge
466 if (!_staging_area.vm_data()->append(incoming_rec)) {
467 return false;
468 }
469 } else {
470 // locate matched record and/or also position the iterator to proper
471 // location for this incoming record.
472 matched_rec = (MemPointerRecord*)malloc_staging_itr.locate(incoming_rec->addr());
473 // we have not seen this memory block in this generation,
474 // so just add to staging area
475 if (matched_rec == NULL) {
476 if (!malloc_staging_itr.insert(incoming_rec)) {
477 return false;
478 }
479 } else if (incoming_rec->addr() == matched_rec->addr()) {
480 // whoever has higher sequence number wins
481 if (incoming_rec->seq() > matched_rec->seq()) {
482 copy_seq_pointer(matched_rec, incoming_rec);
483 }
484 } else if (incoming_rec->addr() < matched_rec->addr()) {
485 if (!malloc_staging_itr.insert(incoming_rec)) {
486 return false;
487 }
488 } else {
489 ShouldNotReachHere();
490 }
491 }
492 incoming_rec = (MemPointerRecord*)itr.next();
493 }
494 NOT_PRODUCT(void check_staging_data();)
495 return true;
496 }
497
498
499 // promote data to next generation
500 bool MemSnapshot::promote(int number_of_classes) {
501 assert(_alloc_ptrs != NULL && _vm_ptrs != NULL, "Just check");
502 assert(_staging_area.malloc_data() != NULL && _staging_area.vm_data() != NULL,
503 "Just check");
504 MutexLockerEx lock(_lock, true);
505
506 MallocRecordIterator malloc_itr = _staging_area.malloc_record_walker();
507 bool promoted = false;
508 if (promote_malloc_records(&malloc_itr)) {
509 VMRecordIterator vm_itr = _staging_area.virtual_memory_record_walker();
510 if (promote_virtual_memory_records(&vm_itr)) {
511 promoted = true;
512 }
513 }
514
515 NOT_PRODUCT(check_malloc_pointers();)
516 _staging_area.clear();
517 _number_of_classes = number_of_classes;
518 return promoted;
519 }
520
521 bool MemSnapshot::promote_malloc_records(MemPointerArrayIterator* itr) {
522 MemPointerIterator malloc_snapshot_itr(_alloc_ptrs);
523 MemPointerRecord* new_rec = (MemPointerRecord*)itr->current();
524 MemPointerRecord* matched_rec;
525 while (new_rec != NULL) {
526 matched_rec = (MemPointerRecord*)malloc_snapshot_itr.locate(new_rec->addr());
527 // found matched memory block
528 if (matched_rec != NULL && new_rec->addr() == matched_rec->addr()) {
529 // snapshot already contains 'live' records
530 assert(matched_rec->is_allocation_record() || matched_rec->is_arena_memory_record(),
531 "Sanity check");
532 // update block states
533 if (new_rec->is_allocation_record()) {
534 assign_pointer(matched_rec, new_rec);
535 } else if (new_rec->is_arena_memory_record()) {
536 if (new_rec->size() == 0) {
537 // remove size record once size drops to 0
538 malloc_snapshot_itr.remove();
539 } else {
540 assign_pointer(matched_rec, new_rec);
541 }
542 } else {
543 // a deallocation record
544 assert(new_rec->is_deallocation_record(), "Sanity check");
545 // an arena record can be followed by a size record, we need to remove both
546 if (matched_rec->is_arena_record()) {
547 MemPointerRecord* next = (MemPointerRecord*)malloc_snapshot_itr.peek_next();
548 if (next != NULL && next->is_arena_memory_record() &&
549 next->is_memory_record_of_arena(matched_rec)) {
550 malloc_snapshot_itr.remove();
551 }
552 }
553 // the memory is deallocated, remove related record(s)
554 malloc_snapshot_itr.remove();
555 }
556 } else {
557 // don't insert size 0 record
558 if (new_rec->is_arena_memory_record() && new_rec->size() == 0) {
559 new_rec = NULL;
560 }
561
562 if (new_rec != NULL) {
563 if (new_rec->is_allocation_record() || new_rec->is_arena_memory_record()) {
564 if (matched_rec != NULL && new_rec->addr() > matched_rec->addr()) {
565 if (!malloc_snapshot_itr.insert_after(new_rec)) {
566 return false;
567 }
568 } else {
569 if (!malloc_snapshot_itr.insert(new_rec)) {
570 return false;
571 }
572 }
573 }
574 #ifndef PRODUCT
575 else if (!has_allocation_record(new_rec->addr())) {
576 // NMT can not track some startup memory, which is allocated before NMT is on
577 _untracked_count ++;
578 }
579 #endif
580 }
581 }
582 new_rec = (MemPointerRecord*)itr->next();
583 }
584 return true;
585 }
586
587 bool MemSnapshot::promote_virtual_memory_records(MemPointerArrayIterator* itr) {
588 VMMemPointerIterator vm_snapshot_itr(_vm_ptrs);
589 MemPointerRecord* new_rec = (MemPointerRecord*)itr->current();
590 VMMemRegion* reserved_rec;
591 while (new_rec != NULL) {
592 assert(new_rec->is_vm_pointer(), "Sanity check");
593
594 // locate a reserved region that contains the specified address, or
595 // the nearest reserved region has base address just above the specified
596 // address
597 reserved_rec = (VMMemRegion*)vm_snapshot_itr.locate(new_rec->addr());
598 if (reserved_rec != NULL && reserved_rec->contains_region(new_rec)) {
599 // snapshot can only have 'live' records
600 assert(reserved_rec->is_reserved_region(), "Sanity check");
601 if (new_rec->is_allocation_record()) {
602 if (!reserved_rec->is_same_region(new_rec)) {
603 // only deal with split a bigger reserved region into smaller regions.
604 // So far, CDS is the only use case.
605 if (!vm_snapshot_itr.split_reserved_region(reserved_rec, new_rec->addr(), new_rec->size())) {
606 return false;
607 }
608 }
609 } else if (new_rec->is_uncommit_record()) {
610 if (!vm_snapshot_itr.remove_uncommitted_region(new_rec)) {
611 return false;
612 }
613 } else if (new_rec->is_commit_record()) {
614 // insert or expand existing committed region to cover this
615 // newly committed region
616 if (!vm_snapshot_itr.add_committed_region(new_rec)) {
617 return false;
618 }
619 } else if (new_rec->is_deallocation_record()) {
620 // release part or all memory region
621 if (!vm_snapshot_itr.remove_released_region(new_rec)) {
622 return false;
623 }
624 } else if (new_rec->is_type_tagging_record()) {
625 // tag this reserved virtual memory range to a memory type. Can not re-tag a memory range
626 // to different type.
627 assert(FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == mtNone ||
628 FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == FLAGS_TO_MEMORY_TYPE(new_rec->flags()),
629 "Sanity check");
630 reserved_rec->tag(new_rec->flags());
631 } else {
632 ShouldNotReachHere();
633 }
634 } else {
635 /*
636 * The assertion failure indicates mis-matched virtual memory records. The likely
637 * scenario is, that some virtual memory operations are not going through os::xxxx_memory()
638 * api, which have to be tracked manually. (perfMemory is an example).
639 */
640 assert(new_rec->is_allocation_record(), "Sanity check");
641 if (!vm_snapshot_itr.add_reserved_region(new_rec)) {
642 return false;
643 }
644 }
645 new_rec = (MemPointerRecord*)itr->next();
646 }
647 return true;
648 }
649
650 #ifndef PRODUCT
651 void MemSnapshot::print_snapshot_stats(outputStream* st) {
652 st->print_cr("Snapshot:");
653 st->print_cr("\tMalloced: %d/%d [%5.2f%%] %dKB", _alloc_ptrs->length(), _alloc_ptrs->capacity(),
654 (100.0 * (float)_alloc_ptrs->length()) / (float)_alloc_ptrs->capacity(), _alloc_ptrs->instance_size()/K);
655
656 st->print_cr("\tVM: %d/%d [%5.2f%%] %dKB", _vm_ptrs->length(), _vm_ptrs->capacity(),
657 (100.0 * (float)_vm_ptrs->length()) / (float)_vm_ptrs->capacity(), _vm_ptrs->instance_size()/K);
658
659 st->print_cr("\tMalloc staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.malloc_data()->length(),
660 _staging_area.malloc_data()->capacity(),
661 (100.0 * (float)_staging_area.malloc_data()->length()) / (float)_staging_area.malloc_data()->capacity(),
662 _staging_area.malloc_data()->instance_size()/K);
663
664 st->print_cr("\tVirtual memory staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.vm_data()->length(),
665 _staging_area.vm_data()->capacity(),
666 (100.0 * (float)_staging_area.vm_data()->length()) / (float)_staging_area.vm_data()->capacity(),
667 _staging_area.vm_data()->instance_size()/K);
668
669 st->print_cr("\tUntracked allocation: %d", _untracked_count);
670 }
671
672 void MemSnapshot::check_malloc_pointers() {
673 MemPointerArrayIteratorImpl mItr(_alloc_ptrs);
674 MemPointerRecord* p = (MemPointerRecord*)mItr.current();
675 MemPointerRecord* prev = NULL;
676 while (p != NULL) {
677 if (prev != NULL) {
678 assert(p->addr() >= prev->addr(), "sorting order");
679 }
680 prev = p;
681 p = (MemPointerRecord*)mItr.next();
682 }
683 }
684
685 bool MemSnapshot::has_allocation_record(address addr) {
686 MemPointerArrayIteratorImpl itr(_staging_area.malloc_data());
687 MemPointerRecord* cur = (MemPointerRecord*)itr.current();
688 while (cur != NULL) {
689 if (cur->addr() == addr && cur->is_allocation_record()) {
690 return true;
691 }
692 cur = (MemPointerRecord*)itr.next();
693 }
694 return false;
695 }
696 #endif // PRODUCT
697
698 #ifdef ASSERT
699 void MemSnapshot::check_staging_data() {
700 MemPointerArrayIteratorImpl itr(_staging_area.malloc_data());
701 MemPointerRecord* cur = (MemPointerRecord*)itr.current();
702 MemPointerRecord* next = (MemPointerRecord*)itr.next();
703 while (next != NULL) {
704 assert((next->addr() > cur->addr()) ||
705 ((next->flags() & MemPointerRecord::tag_masks) >
706 (cur->flags() & MemPointerRecord::tag_masks)),
707 "sorting order");
708 cur = next;
709 next = (MemPointerRecord*)itr.next();
710 }
711
712 MemPointerArrayIteratorImpl vm_itr(_staging_area.vm_data());
713 cur = (MemPointerRecord*)vm_itr.current();
714 while (cur != NULL) {
715 assert(cur->is_vm_pointer(), "virtual memory pointer only");
716 cur = (MemPointerRecord*)vm_itr.next();
717 }
718 }
719
720 void MemSnapshot::dump_all_vm_pointers() {
721 MemPointerArrayIteratorImpl itr(_vm_ptrs);
722 VMMemRegion* ptr = (VMMemRegion*)itr.current();
723 tty->print_cr("dump virtual memory pointers:");
724 while (ptr != NULL) {
725 if (ptr->is_committed_region()) {
726 tty->print("\t");
727 }
728 tty->print("[" PTR_FORMAT " - " PTR_FORMAT "] [%x]", ptr->addr(),
729 (ptr->addr() + ptr->size()), ptr->flags());
730
731 if (MemTracker::track_callsite()) {
732 VMMemRegionEx* ex = (VMMemRegionEx*)ptr;
733 if (ex->pc() != NULL) {
734 char buf[1024];
735 if (os::dll_address_to_function_name(ex->pc(), buf, sizeof(buf), NULL)) {
736 tty->print_cr("\t%s", buf);
737 } else {
738 tty->cr();
739 }
740 }
741 }
742
743 ptr = (VMMemRegion*)itr.next();
744 }
745 tty->flush();
746 }
747 #endif // ASSERT
748

Mercurial Repository: jdk8-mips64-public/hotspot

mercurial