Mercurial > hg > truffle
annotate src/share/vm/services/virtualMemoryTracker.cpp @ 20553:417e3b8d04c5
8059100: SIGSEGV VirtualMemoryTracker::remove_released_region
Summary: Disallow increasing native memory tracking level
Reviewed-by: hseigel, ctornqvi, gtriantafill
| author | coleenp |
|---|---|
| date | Fri, 10 Oct 2014 19:36:12 +0000 |
| parents | 3adc0e278f49 |
| children |
| rev | line source |
|---|---|
| 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; | |
| 20364 | 170 CommittedMemoryRegion high_rgn(high_base, high_size, NativeCallStack::EMPTY_STACK); |
| 20360 | 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 } | |
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341 |
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342 // CDS mapping region. |
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343 // CDS reserves the whole region for mapping CDS archive, then maps each section into the region. |
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344 // NMT reports CDS as a whole. |
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345 if (reserved_rgn->flag() == mtClassShared) { |
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346 assert(reserved_rgn->contain_region(base_addr, size), "Reserved CDS region should contain this mapping region"); |
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347 return true; |
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348 } |
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349 |
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350 ShouldNotReachHere(); |
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351 return false; |
| 20360 | 352 } |
| 353 } | |
| 354 } | |
| 355 | |
| 356 void VirtualMemoryTracker::set_reserved_region_type(address addr, MEMFLAGS flag) { | |
| 357 assert(addr != NULL, "Invalid address"); | |
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358 assert(_reserved_regions != NULL, "Sanity check"); |
| 20360 | 359 |
| 360 ReservedMemoryRegion rgn(addr, 1); | |
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361 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
| 20360 | 362 if (reserved_rgn != NULL) { |
| 363 assert(reserved_rgn->contain_address(addr), "Containment"); | |
| 364 if (reserved_rgn->flag() != flag) { | |
| 365 assert(reserved_rgn->flag() == mtNone, "Overwrite memory type"); | |
| 366 reserved_rgn->set_flag(flag); | |
| 367 } | |
| 368 } | |
| 369 } | |
| 370 | |
| 371 bool VirtualMemoryTracker::add_committed_region(address addr, size_t size, | |
| 372 const NativeCallStack& stack) { | |
| 373 assert(addr != NULL, "Invalid address"); | |
| 374 assert(size > 0, "Invalid size"); | |
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375 assert(_reserved_regions != NULL, "Sanity check"); |
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376 |
| 20360 | 377 ReservedMemoryRegion rgn(addr, size); |
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378 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
| 20360 | 379 |
| 380 assert(reserved_rgn != NULL, "No reserved region"); | |
| 381 assert(reserved_rgn->contain_region(addr, size), "Not completely contained"); | |
| 382 return reserved_rgn->add_committed_region(addr, size, stack); | |
| 383 } | |
| 384 | |
| 385 bool VirtualMemoryTracker::remove_uncommitted_region(address addr, size_t size) { | |
| 386 assert(addr != NULL, "Invalid address"); | |
| 387 assert(size > 0, "Invalid size"); | |
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388 assert(_reserved_regions != NULL, "Sanity check"); |
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389 |
| 20360 | 390 ReservedMemoryRegion rgn(addr, size); |
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391 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
| 20360 | 392 assert(reserved_rgn != NULL, "No reserved region"); |
| 393 assert(reserved_rgn->contain_region(addr, size), "Not completely contained"); | |
| 394 return reserved_rgn->remove_uncommitted_region(addr, size); | |
| 395 } | |
| 396 | |
| 397 bool VirtualMemoryTracker::remove_released_region(address addr, size_t size) { | |
| 398 assert(addr != NULL, "Invalid address"); | |
| 399 assert(size > 0, "Invalid size"); | |
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400 assert(_reserved_regions != NULL, "Sanity check"); |
| 20360 | 401 |
| 402 ReservedMemoryRegion rgn(addr, size); | |
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403 ReservedMemoryRegion* reserved_rgn = _reserved_regions->find(rgn); |
| 20360 | 404 |
| 405 assert(reserved_rgn != NULL, "No reserved region"); | |
| 406 | |
| 407 // uncommit regions within the released region | |
| 408 if (!reserved_rgn->remove_uncommitted_region(addr, size)) { | |
| 409 return false; | |
| 410 } | |
| 411 | |
| 412 | |
| 413 VirtualMemorySummary::record_released_memory(size, reserved_rgn->flag()); | |
| 414 | |
| 415 if (reserved_rgn->same_region(addr, size)) { | |
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416 return _reserved_regions->remove(rgn); |
| 20360 | 417 } else { |
| 418 assert(reserved_rgn->contain_region(addr, size), "Not completely contained"); | |
| 419 if (reserved_rgn->base() == addr || | |
| 420 reserved_rgn->end() == addr + size) { | |
| 421 reserved_rgn->exclude_region(addr, size); | |
| 422 return true; | |
| 423 } else { | |
| 424 address top = reserved_rgn->end(); | |
| 425 address high_base = addr + size; | |
| 426 ReservedMemoryRegion high_rgn(high_base, top - high_base, | |
| 427 *reserved_rgn->call_stack(), reserved_rgn->flag()); | |
| 428 | |
| 429 // use original region for lower region | |
| 430 reserved_rgn->exclude_region(addr, top - addr); | |
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431 LinkedListNode<ReservedMemoryRegion>* new_rgn = _reserved_regions->add(high_rgn); |
| 20360 | 432 if (new_rgn == NULL) { |
| 433 return false; | |
| 434 } else { | |
| 435 reserved_rgn->move_committed_regions(addr, *new_rgn->data()); | |
| 436 return true; | |
| 437 } | |
| 438 } | |
| 439 } | |
| 440 } | |
| 441 | |
| 442 | |
| 443 bool VirtualMemoryTracker::walk_virtual_memory(VirtualMemoryWalker* walker) { | |
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444 assert(_reserved_regions != NULL, "Sanity check"); |
| 20360 | 445 ThreadCritical tc; |
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446 // Check that the _reserved_regions haven't been deleted. |
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447 if (_reserved_regions != NULL) { |
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448 LinkedListNode<ReservedMemoryRegion>* head = _reserved_regions->head(); |
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449 while (head != NULL) { |
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450 const ReservedMemoryRegion* rgn = head->peek(); |
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451 if (!walker->do_allocation_site(rgn)) { |
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452 return false; |
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453 } |
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454 head = head->next(); |
| 20360 | 455 } |
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456 } |
| 20360 | 457 return true; |
| 458 } | |
| 459 | |
| 460 // Transition virtual memory tracking level. | |
| 461 bool VirtualMemoryTracker::transition(NMT_TrackingLevel from, NMT_TrackingLevel to) { | |
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462 assert (from != NMT_minimal, "cannot convert from the lowest tracking level to anything"); |
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463 if (to == NMT_minimal) { |
| 20360 | 464 assert(from == NMT_summary || from == NMT_detail, "Just check"); |
| 465 // Clean up virtual memory tracking data structures. | |
| 466 ThreadCritical tc; | |
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467 // Check for potential race with other thread calling transition |
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468 if (_reserved_regions != NULL) { |
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469 delete _reserved_regions; |
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470 _reserved_regions = NULL; |
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471 } |
| 20360 | 472 } |
| 473 | |
| 474 return true; | |
| 475 } | |
| 476 | |
| 477 |