Mercurial > hg > truffle
annotate src/share/vm/services/virtualMemoryTracker.cpp @ 20363:36c9011aaead
8054368: nsk/jdi/VirtualMachine/exit/exit002 crash with detail tracking on (NMT2)
Summary: Dynamic allocate _reserved_regions instead of static object to avoid racing during process exit
Reviewed-by: dholmes, coleenp
author | zgu |
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date | Thu, 14 Aug 2014 09:02:51 -0400 |
parents | 833b0f92429a |
children | c6211b707068 |
rev | line source |
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20360 | 1 /* |
2 * Copyright (c) 2013, 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 #include "precompiled.hpp" | |
25 | |
26 #include "runtime/threadCritical.hpp" | |
27 #include "services/virtualMemoryTracker.hpp" | |
28 | |
29 size_t VirtualMemorySummary::_snapshot[CALC_OBJ_SIZE_IN_TYPE(VirtualMemorySnapshot, size_t)]; | |
30 | |
31 void VirtualMemorySummary::initialize() { | |
32 assert(sizeof(_snapshot) >= sizeof(VirtualMemorySnapshot), "Sanity Check"); | |
33 // Use placement operator new to initialize static data area. | |
34 ::new ((void*)_snapshot) VirtualMemorySnapshot(); | |
35 } | |
36 | |
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37 SortedLinkedList<ReservedMemoryRegion, compare_reserved_region_base>* VirtualMemoryTracker::_reserved_regions; |
20360 | 38 |
39 int compare_committed_region(const CommittedMemoryRegion& r1, const CommittedMemoryRegion& r2) { | |
40 return r1.compare(r2); | |
41 } | |
42 | |
43 int compare_reserved_region_base(const ReservedMemoryRegion& r1, const ReservedMemoryRegion& r2) { | |
44 return r1.compare(r2); | |
45 } | |
46 | |
47 bool ReservedMemoryRegion::add_committed_region(address addr, size_t size, const NativeCallStack& stack) { | |
48 assert(addr != NULL, "Invalid address"); | |
49 assert(size > 0, "Invalid size"); | |
50 assert(contain_region(addr, size), "Not contain this region"); | |
51 | |
52 if (all_committed()) return true; | |
53 | |
54 CommittedMemoryRegion committed_rgn(addr, size, stack); | |
55 LinkedListNode<CommittedMemoryRegion>* node = _committed_regions.find_node(committed_rgn); | |
56 if (node != NULL) { | |
57 CommittedMemoryRegion* rgn = node->data(); | |
58 if (rgn->same_region(addr, size)) { | |
59 return true; | |
60 } | |
61 | |
62 if (rgn->adjacent_to(addr, size)) { | |
63 // check if the next region covers this committed region, | |
64 // the regions may not be merged due to different call stacks | |
65 LinkedListNode<CommittedMemoryRegion>* next = | |
66 node->next(); | |
67 if (next != NULL && next->data()->contain_region(addr, size)) { | |
68 if (next->data()->same_region(addr, size)) { | |
69 next->data()->set_call_stack(stack); | |
70 } | |
71 return true; | |
72 } | |
73 if (rgn->call_stack()->equals(stack)) { | |
74 VirtualMemorySummary::record_uncommitted_memory(rgn->size(), flag()); | |
75 // the two adjacent regions have the same call stack, merge them | |
76 rgn->expand_region(addr, size); | |
77 VirtualMemorySummary::record_committed_memory(rgn->size(), flag()); | |
78 return true; | |
79 } | |
80 VirtualMemorySummary::record_committed_memory(size, flag()); | |
81 if (rgn->base() > addr) { | |
82 return _committed_regions.insert_before(committed_rgn, node) != NULL; | |
83 } else { | |
84 return _committed_regions.insert_after(committed_rgn, node) != NULL; | |
85 } | |
86 } | |
87 assert(rgn->contain_region(addr, size), "Must cover this region"); | |
88 return true; | |
89 } else { | |
90 // New committed region | |
91 VirtualMemorySummary::record_committed_memory(size, flag()); | |
92 return add_committed_region(committed_rgn); | |
93 } | |
94 } | |
95 | |
96 void ReservedMemoryRegion::set_all_committed(bool b) { | |
97 if (all_committed() != b) { | |
98 _all_committed = b; | |
99 if (b) { | |
100 VirtualMemorySummary::record_committed_memory(size(), flag()); | |
101 } | |
102 } | |
103 } | |
104 | |
105 bool ReservedMemoryRegion::remove_uncommitted_region(LinkedListNode<CommittedMemoryRegion>* node, | |
106 address addr, size_t size) { | |
107 assert(addr != NULL, "Invalid address"); | |
108 assert(size > 0, "Invalid size"); | |
109 | |
110 CommittedMemoryRegion* rgn = node->data(); | |
111 assert(rgn->contain_region(addr, size), "Has to be contained"); | |
112 assert(!rgn->same_region(addr, size), "Can not be the same region"); | |
113 | |
114 if (rgn->base() == addr || | |
115 rgn->end() == addr + size) { | |
116 rgn->exclude_region(addr, size); | |
117 return true; | |
118 } else { | |
119 // split this region | |
120 address top =rgn->end(); | |
121 // use this region for lower part | |
122 size_t exclude_size = rgn->end() - addr; | |
123 rgn->exclude_region(addr, exclude_size); | |
124 | |
125 // higher part | |
126 address high_base = addr + size; | |
127 size_t high_size = top - high_base; | |
128 | |
129 CommittedMemoryRegion high_rgn(high_base, high_size, *rgn->call_stack()); | |
130 LinkedListNode<CommittedMemoryRegion>* high_node = _committed_regions.add(high_rgn); | |
131 assert(high_node == NULL || node->next() == high_node, "Should be right after"); | |
132 return (high_node != NULL); | |
133 } | |
134 | |
135 return false; | |
136 } | |
137 | |
138 bool ReservedMemoryRegion::remove_uncommitted_region(address addr, size_t sz) { | |
139 // uncommit stack guard pages | |
140 if (flag() == mtThreadStack && !same_region(addr, sz)) { | |
141 return true; | |
142 } | |
143 | |
144 assert(addr != NULL, "Invalid address"); | |
145 assert(sz > 0, "Invalid size"); | |
146 | |
147 if (all_committed()) { | |
148 assert(_committed_regions.is_empty(), "Sanity check"); | |
149 assert(contain_region(addr, sz), "Reserved region does not contain this region"); | |
150 set_all_committed(false); | |
151 VirtualMemorySummary::record_uncommitted_memory(sz, flag()); | |
152 if (same_region(addr, sz)) { | |
153 return true; | |
154 } else { | |
155 CommittedMemoryRegion rgn(base(), size(), *call_stack()); | |
156 if (rgn.base() == addr || rgn.end() == (addr + sz)) { | |
157 rgn.exclude_region(addr, sz); | |
158 return add_committed_region(rgn); | |
159 } else { | |
160 // split this region | |
161 // top of the whole region | |
162 address top =rgn.end(); | |
163 // use this region for lower part | |
164 size_t exclude_size = rgn.end() - addr; | |
165 rgn.exclude_region(addr, exclude_size); | |
166 if (add_committed_region(rgn)) { | |
167 // higher part | |
168 address high_base = addr + sz; | |
169 size_t high_size = top - high_base; | |
170 CommittedMemoryRegion high_rgn(high_base, high_size, emptyStack); | |
171 return add_committed_region(high_rgn); | |
172 } else { | |
173 return false; | |
174 } | |
175 } | |
176 } | |
177 } else { | |
178 // we have to walk whole list to remove the committed regions in | |
179 // specified range | |
180 LinkedListNode<CommittedMemoryRegion>* head = | |
181 _committed_regions.head(); | |
182 LinkedListNode<CommittedMemoryRegion>* prev = NULL; | |
183 VirtualMemoryRegion uncommitted_rgn(addr, sz); | |
184 | |
185 while (head != NULL && !uncommitted_rgn.is_empty()) { | |
186 CommittedMemoryRegion* crgn = head->data(); | |
187 // this committed region overlaps to region to uncommit | |
188 if (crgn->overlap_region(uncommitted_rgn.base(), uncommitted_rgn.size())) { | |
189 if (crgn->same_region(uncommitted_rgn.base(), uncommitted_rgn.size())) { | |
190 // find matched region, remove the node will do | |
191 VirtualMemorySummary::record_uncommitted_memory(uncommitted_rgn.size(), flag()); | |
192 _committed_regions.remove_after(prev); | |
193 return true; | |
194 } else if (crgn->contain_region(uncommitted_rgn.base(), uncommitted_rgn.size())) { | |
195 // this committed region contains whole uncommitted region | |
196 VirtualMemorySummary::record_uncommitted_memory(uncommitted_rgn.size(), flag()); | |
197 return remove_uncommitted_region(head, uncommitted_rgn.base(), uncommitted_rgn.size()); | |
198 } else if (uncommitted_rgn.contain_region(crgn->base(), crgn->size())) { | |
199 // this committed region has been uncommitted | |
200 size_t exclude_size = crgn->end() - uncommitted_rgn.base(); | |
201 uncommitted_rgn.exclude_region(uncommitted_rgn.base(), exclude_size); | |
202 VirtualMemorySummary::record_uncommitted_memory(crgn->size(), flag()); | |
203 LinkedListNode<CommittedMemoryRegion>* tmp = head; | |
204 head = head->next(); | |
205 _committed_regions.remove_after(prev); | |
206 continue; | |
207 } else if (crgn->contain_address(uncommitted_rgn.base())) { | |
208 size_t toUncommitted = crgn->end() - uncommitted_rgn.base(); | |
209 crgn->exclude_region(uncommitted_rgn.base(), toUncommitted); | |
210 uncommitted_rgn.exclude_region(uncommitted_rgn.base(), toUncommitted); | |
211 VirtualMemorySummary::record_uncommitted_memory(toUncommitted, flag()); | |
212 } else if (uncommitted_rgn.contain_address(crgn->base())) { | |
213 size_t toUncommitted = uncommitted_rgn.end() - crgn->base(); | |
214 crgn->exclude_region(crgn->base(), toUncommitted); | |
215 uncommitted_rgn.exclude_region(uncommitted_rgn.end() - toUncommitted, | |
216 toUncommitted); | |
217 VirtualMemorySummary::record_uncommitted_memory(toUncommitted, flag()); | |
218 } | |
219 } | |
220 prev = head; | |
221 head = head->next(); | |
222 } | |
223 } | |
224 | |
225 return true; | |
226 } | |
227 | |
228 void ReservedMemoryRegion::move_committed_regions(address addr, ReservedMemoryRegion& rgn) { | |
229 assert(addr != NULL, "Invalid address"); | |
230 | |
231 // split committed regions | |
232 LinkedListNode<CommittedMemoryRegion>* head = | |
233 _committed_regions.head(); | |
234 LinkedListNode<CommittedMemoryRegion>* prev = NULL; | |
235 | |
236 while (head != NULL) { | |
237 if (head->data()->base() >= addr) { | |
238 break; | |
239 } | |
240 prev = head; | |
241 head = head->next(); | |
242 } | |
243 | |
244 if (head != NULL) { | |
245 if (prev != NULL) { | |
246 prev->set_next(head->next()); | |
247 } else { | |
248 _committed_regions.set_head(NULL); | |
249 } | |
250 } | |
251 | |
252 rgn._committed_regions.set_head(head); | |
253 } | |
254 | |
255 size_t ReservedMemoryRegion::committed_size() const { | |
256 if (all_committed()) { | |
257 return size(); | |
258 } else { | |
259 size_t committed = 0; | |
260 LinkedListNode<CommittedMemoryRegion>* head = | |
261 _committed_regions.head(); | |
262 while (head != NULL) { | |
263 committed += head->data()->size(); | |
264 head = head->next(); | |
265 } | |
266 return committed; | |
267 } | |
268 } | |
269 | |
270 void ReservedMemoryRegion::set_flag(MEMFLAGS f) { | |
271 assert((flag() == mtNone || flag() == f), "Overwrite memory type"); | |
272 if (flag() != f) { | |
273 VirtualMemorySummary::move_reserved_memory(flag(), f, size()); | |
274 VirtualMemorySummary::move_committed_memory(flag(), f, committed_size()); | |
275 _flag = f; | |
276 } | |
277 } | |
278 | |
279 bool VirtualMemoryTracker::initialize(NMT_TrackingLevel level) { | |
280 if (level >= NMT_summary) { | |
281 VirtualMemorySummary::initialize(); | |
282 } | |
283 return true; | |
284 } | |
285 | |
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286 bool VirtualMemoryTracker::late_initialize(NMT_TrackingLevel level) { |
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287 if (level >= NMT_summary) { |
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288 _reserved_regions = new (std::nothrow, ResourceObj::C_HEAP, mtNMT) |
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289 SortedLinkedList<ReservedMemoryRegion, compare_reserved_region_base>(); |
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290 return (_reserved_regions != NULL); |
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291 } |
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292 return true; |
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293 } |
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294 |
20360 | 295 bool VirtualMemoryTracker::add_reserved_region(address base_addr, size_t size, |
296 const NativeCallStack& stack, MEMFLAGS flag, bool all_committed) { | |
297 assert(base_addr != NULL, "Invalid address"); | |
298 assert(size > 0, "Invalid size"); | |
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299 assert(_reserved_regions != NULL, "Sanity check"); |
20360 | 300 ReservedMemoryRegion rgn(base_addr, size, stack, flag); |
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301 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
20360 | 302 LinkedListNode<ReservedMemoryRegion>* node; |
303 if (reserved_rgn == NULL) { | |
304 VirtualMemorySummary::record_reserved_memory(size, flag); | |
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305 node = _reserved_regions->add(rgn); |
20360 | 306 if (node != NULL) { |
307 node->data()->set_all_committed(all_committed); | |
308 return true; | |
309 } else { | |
310 return false; | |
311 } | |
312 } else { | |
313 if (reserved_rgn->same_region(base_addr, size)) { | |
314 reserved_rgn->set_call_stack(stack); | |
315 reserved_rgn->set_flag(flag); | |
316 return true; | |
317 } else if (reserved_rgn->adjacent_to(base_addr, size)) { | |
318 VirtualMemorySummary::record_reserved_memory(size, flag); | |
319 reserved_rgn->expand_region(base_addr, size); | |
320 reserved_rgn->set_call_stack(stack); | |
321 return true; | |
322 } else { | |
323 // Overlapped reservation. | |
324 // It can happen when the regions are thread stacks, as JNI | |
325 // thread does not detach from VM before exits, and leads to | |
326 // leak JavaThread object | |
327 if (reserved_rgn->flag() == mtThreadStack) { | |
328 guarantee(!CheckJNICalls, "Attached JNI thread exited without being detached"); | |
329 // Overwrite with new region | |
330 | |
331 // Release old region | |
332 VirtualMemorySummary::record_uncommitted_memory(reserved_rgn->committed_size(), reserved_rgn->flag()); | |
333 VirtualMemorySummary::record_released_memory(reserved_rgn->size(), reserved_rgn->flag()); | |
334 | |
335 // Add new region | |
336 VirtualMemorySummary::record_reserved_memory(rgn.size(), flag); | |
337 | |
338 *reserved_rgn = rgn; | |
339 return true; | |
340 } else { | |
341 ShouldNotReachHere(); | |
342 return false; | |
343 } | |
344 } | |
345 } | |
346 } | |
347 | |
348 void VirtualMemoryTracker::set_reserved_region_type(address addr, MEMFLAGS flag) { | |
349 assert(addr != NULL, "Invalid address"); | |
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350 assert(_reserved_regions != NULL, "Sanity check"); |
20360 | 351 |
352 ReservedMemoryRegion rgn(addr, 1); | |
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353 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
20360 | 354 if (reserved_rgn != NULL) { |
355 assert(reserved_rgn->contain_address(addr), "Containment"); | |
356 if (reserved_rgn->flag() != flag) { | |
357 assert(reserved_rgn->flag() == mtNone, "Overwrite memory type"); | |
358 reserved_rgn->set_flag(flag); | |
359 } | |
360 } | |
361 } | |
362 | |
363 bool VirtualMemoryTracker::add_committed_region(address addr, size_t size, | |
364 const NativeCallStack& stack) { | |
365 assert(addr != NULL, "Invalid address"); | |
366 assert(size > 0, "Invalid size"); | |
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367 assert(_reserved_regions != NULL, "Sanity check"); |
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368 |
20360 | 369 ReservedMemoryRegion rgn(addr, size); |
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370 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
20360 | 371 |
372 assert(reserved_rgn != NULL, "No reserved region"); | |
373 assert(reserved_rgn->contain_region(addr, size), "Not completely contained"); | |
374 return reserved_rgn->add_committed_region(addr, size, stack); | |
375 } | |
376 | |
377 bool VirtualMemoryTracker::remove_uncommitted_region(address addr, size_t size) { | |
378 assert(addr != NULL, "Invalid address"); | |
379 assert(size > 0, "Invalid size"); | |
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380 assert(_reserved_regions != NULL, "Sanity check"); |
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381 |
20360 | 382 ReservedMemoryRegion rgn(addr, size); |
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383 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
20360 | 384 assert(reserved_rgn != NULL, "No reserved region"); |
385 assert(reserved_rgn->contain_region(addr, size), "Not completely contained"); | |
386 return reserved_rgn->remove_uncommitted_region(addr, size); | |
387 } | |
388 | |
389 bool VirtualMemoryTracker::remove_released_region(address addr, size_t size) { | |
390 assert(addr != NULL, "Invalid address"); | |
391 assert(size > 0, "Invalid size"); | |
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392 assert(_reserved_regions != NULL, "Sanity check"); |
20360 | 393 |
394 ReservedMemoryRegion rgn(addr, size); | |
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395 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
20360 | 396 |
397 assert(reserved_rgn != NULL, "No reserved region"); | |
398 | |
399 // uncommit regions within the released region | |
400 if (!reserved_rgn->remove_uncommitted_region(addr, size)) { | |
401 return false; | |
402 } | |
403 | |
404 | |
405 VirtualMemorySummary::record_released_memory(size, reserved_rgn->flag()); | |
406 | |
407 if (reserved_rgn->same_region(addr, size)) { | |
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408 return _reserved_regions->remove(rgn); |
20360 | 409 } else { |
410 assert(reserved_rgn->contain_region(addr, size), "Not completely contained"); | |
411 if (reserved_rgn->base() == addr || | |
412 reserved_rgn->end() == addr + size) { | |
413 reserved_rgn->exclude_region(addr, size); | |
414 return true; | |
415 } else { | |
416 address top = reserved_rgn->end(); | |
417 address high_base = addr + size; | |
418 ReservedMemoryRegion high_rgn(high_base, top - high_base, | |
419 *reserved_rgn->call_stack(), reserved_rgn->flag()); | |
420 | |
421 // use original region for lower region | |
422 reserved_rgn->exclude_region(addr, top - addr); | |
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423 LinkedListNode<ReservedMemoryRegion>* new_rgn = _reserved_regions->add(high_rgn); |
20360 | 424 if (new_rgn == NULL) { |
425 return false; | |
426 } else { | |
427 reserved_rgn->move_committed_regions(addr, *new_rgn->data()); | |
428 return true; | |
429 } | |
430 } | |
431 } | |
432 } | |
433 | |
434 | |
435 bool VirtualMemoryTracker::walk_virtual_memory(VirtualMemoryWalker* walker) { | |
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436 assert(_reserved_regions != NULL, "Sanity check"); |
20360 | 437 ThreadCritical tc; |
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438 LinkedListNode<ReservedMemoryRegion>* head = _reserved_regions->head(); |
20360 | 439 while (head != NULL) { |
440 const ReservedMemoryRegion* rgn = head->peek(); | |
441 if (!walker->do_allocation_site(rgn)) { | |
442 return false; | |
443 } | |
444 head = head->next(); | |
445 } | |
446 return true; | |
447 } | |
448 | |
449 // Transition virtual memory tracking level. | |
450 bool VirtualMemoryTracker::transition(NMT_TrackingLevel from, NMT_TrackingLevel to) { | |
451 if (from == NMT_minimal) { | |
452 assert(to == NMT_summary || to == NMT_detail, "Just check"); | |
453 VirtualMemorySummary::reset(); | |
454 } else if (to == NMT_minimal) { | |
455 assert(from == NMT_summary || from == NMT_detail, "Just check"); | |
456 // Clean up virtual memory tracking data structures. | |
457 ThreadCritical tc; | |
20363
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458 if (_reserved_regions != NULL) { |
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459 delete _reserved_regions; |
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460 _reserved_regions = NULL; |
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461 } |
20360 | 462 } |
463 | |
464 return true; | |
465 } | |
466 | |
467 |