Mercurial > hg > truffle
annotate src/share/vm/services/memTracker.cpp @ 12146:9758d9f36299
8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced
Summary: declare all user-defined operator new()s within Hotspot code with the empty throw() exception specification
Reviewed-by: coleenp, twisti, dholmes, hseigel, dcubed, kvn, ccheung
Contributed-by: lois.foltan@oracle.com
| author | coleenp |
|---|---|
| date | Thu, 29 Aug 2013 18:56:29 -0400 |
| parents | 248c459b2b75 |
| children | ce8f6bb717c9 |
| rev | line source |
|---|---|
| 6197 | 1 /* |
|
9061
4c8bb5e4f68f
8011161: NMT: Memory leak when encountering out of memory error while initializing memory snapshot
zgu
parents:
8810
diff
changeset
|
2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| 6197 | 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 | |
|
7464
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7172
diff
changeset
|
26 #include "oops/instanceKlass.hpp" |
| 6197 | 27 #include "runtime/atomic.hpp" |
| 28 #include "runtime/interfaceSupport.hpp" | |
| 29 #include "runtime/mutexLocker.hpp" | |
| 30 #include "runtime/safepoint.hpp" | |
| 31 #include "runtime/threadCritical.hpp" | |
|
7971
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
32 #include "runtime/vm_operations.hpp" |
| 6197 | 33 #include "services/memPtr.hpp" |
| 34 #include "services/memReporter.hpp" | |
| 35 #include "services/memTracker.hpp" | |
| 36 #include "utilities/decoder.hpp" | |
|
10355
fb14e9ed1594
8011064: Some tests have failed with SIGSEGV on arm-hflt on build b82
jprovino
parents:
10148
diff
changeset
|
37 #include "utilities/defaultStream.hpp" |
| 6197 | 38 #include "utilities/globalDefinitions.hpp" |
| 39 | |
| 40 bool NMT_track_callsite = false; | |
| 41 | |
| 42 // walk all 'known' threads at NMT sync point, and collect their recorders | |
| 43 void SyncThreadRecorderClosure::do_thread(Thread* thread) { | |
| 44 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); | |
| 45 if (thread->is_Java_thread()) { | |
| 46 JavaThread* javaThread = (JavaThread*)thread; | |
| 47 MemRecorder* recorder = javaThread->get_recorder(); | |
| 48 if (recorder != NULL) { | |
| 49 MemTracker::enqueue_pending_recorder(recorder); | |
| 50 javaThread->set_recorder(NULL); | |
| 51 } | |
| 52 } | |
| 53 _thread_count ++; | |
| 54 } | |
| 55 | |
| 56 | |
|
10096
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
57 MemRecorder* volatile MemTracker::_global_recorder = NULL; |
| 6197 | 58 MemSnapshot* MemTracker::_snapshot = NULL; |
| 59 MemBaseline MemTracker::_baseline; | |
|
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
60 Mutex* MemTracker::_query_lock = NULL; |
|
10096
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
61 MemRecorder* volatile MemTracker::_merge_pending_queue = NULL; |
|
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
62 MemRecorder* volatile MemTracker::_pooled_recorders = NULL; |
| 6197 | 63 MemTrackWorker* MemTracker::_worker_thread = NULL; |
| 64 int MemTracker::_sync_point_skip_count = 0; | |
| 65 MemTracker::NMTLevel MemTracker::_tracking_level = MemTracker::NMT_off; | |
| 66 volatile MemTracker::NMTStates MemTracker::_state = NMT_uninited; | |
| 67 MemTracker::ShutdownReason MemTracker::_reason = NMT_shutdown_none; | |
| 68 int MemTracker::_thread_count = 255; | |
| 69 volatile jint MemTracker::_pooled_recorder_count = 0; | |
|
7971
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
70 volatile unsigned long MemTracker::_processing_generation = 0; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
71 volatile bool MemTracker::_worker_thread_idle = false; |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
72 volatile jint MemTracker::_pending_op_count = 0; |
|
8810
06db4c0afbf3
8009298: NMT: Special version of class loading/unloading with runThese stresses out NMT
zgu
parents:
7971
diff
changeset
|
73 volatile bool MemTracker::_slowdown_calling_thread = false; |
| 6197 | 74 debug_only(intx MemTracker::_main_thread_tid = 0;) |
|
6607
e5bf1c79ed5b
7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
zgu
parents:
6235
diff
changeset
|
75 NOT_PRODUCT(volatile jint MemTracker::_pending_recorder_count = 0;) |
| 6197 | 76 |
| 77 void MemTracker::init_tracking_options(const char* option_line) { | |
| 78 _tracking_level = NMT_off; | |
|
7172
bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
zgu
parents:
6882
diff
changeset
|
79 if (strcmp(option_line, "=summary") == 0) { |
| 6197 | 80 _tracking_level = NMT_summary; |
|
7172
bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
zgu
parents:
6882
diff
changeset
|
81 } else if (strcmp(option_line, "=detail") == 0) { |
|
10355
fb14e9ed1594
8011064: Some tests have failed with SIGSEGV on arm-hflt on build b82
jprovino
parents:
10148
diff
changeset
|
82 // detail relies on a stack-walking ability that may not |
|
fb14e9ed1594
8011064: Some tests have failed with SIGSEGV on arm-hflt on build b82
jprovino
parents:
10148
diff
changeset
|
83 // be available depending on platform and/or compiler flags |
| 11129 | 84 #if PLATFORM_NATIVE_STACK_WALKING_SUPPORTED |
|
10355
fb14e9ed1594
8011064: Some tests have failed with SIGSEGV on arm-hflt on build b82
jprovino
parents:
10148
diff
changeset
|
85 _tracking_level = NMT_detail; |
| 11129 | 86 #else |
|
10355
fb14e9ed1594
8011064: Some tests have failed with SIGSEGV on arm-hflt on build b82
jprovino
parents:
10148
diff
changeset
|
87 jio_fprintf(defaultStream::error_stream(), |
| 11129 | 88 "NMT detail is not supported on this platform. Using NMT summary instead.\n"); |
|
10355
fb14e9ed1594
8011064: Some tests have failed with SIGSEGV on arm-hflt on build b82
jprovino
parents:
10148
diff
changeset
|
89 _tracking_level = NMT_summary; |
| 11129 | 90 #endif |
|
7172
bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
zgu
parents:
6882
diff
changeset
|
91 } else if (strcmp(option_line, "=off") != 0) { |
|
bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
zgu
parents:
6882
diff
changeset
|
92 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); |
| 6197 | 93 } |
| 94 } | |
| 95 | |
| 96 // first phase of bootstrapping, when VM is still in single-threaded mode. | |
| 97 void MemTracker::bootstrap_single_thread() { | |
| 98 if (_tracking_level > NMT_off) { | |
| 99 assert(_state == NMT_uninited, "wrong state"); | |
| 100 | |
| 101 // NMT is not supported with UseMallocOnly is on. NMT can NOT | |
| 102 // handle the amount of malloc data without significantly impacting | |
| 103 // runtime performance when this flag is on. | |
| 104 if (UseMallocOnly) { | |
| 105 shutdown(NMT_use_malloc_only); | |
| 106 return; | |
| 107 } | |
| 108 | |
|
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
109 _query_lock = new (std::nothrow) Mutex(Monitor::max_nonleaf, "NMT_queryLock"); |
|
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
110 if (_query_lock == NULL) { |
|
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
111 shutdown(NMT_out_of_memory); |
|
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
112 return; |
|
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
113 } |
|
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
114 |
| 6197 | 115 debug_only(_main_thread_tid = os::current_thread_id();) |
| 116 _state = NMT_bootstrapping_single_thread; | |
| 117 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 // second phase of bootstrapping, when VM is about to or already entered multi-theaded mode. | |
| 122 void MemTracker::bootstrap_multi_thread() { | |
| 123 if (_tracking_level > NMT_off && _state == NMT_bootstrapping_single_thread) { | |
| 124 // create nmt lock for multi-thread execution | |
| 125 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
| 126 _state = NMT_bootstrapping_multi_thread; | |
| 127 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 // fully start nmt | |
| 132 void MemTracker::start() { | |
| 133 // Native memory tracking is off from command line option | |
| 134 if (_tracking_level == NMT_off || shutdown_in_progress()) return; | |
| 135 | |
| 136 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
| 137 assert(_state == NMT_bootstrapping_multi_thread, "wrong state"); | |
| 138 | |
| 139 _snapshot = new (std::nothrow)MemSnapshot(); | |
|
9061
4c8bb5e4f68f
8011161: NMT: Memory leak when encountering out of memory error while initializing memory snapshot
zgu
parents:
8810
diff
changeset
|
140 if (_snapshot != NULL) { |
|
10096
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
141 if (!_snapshot->out_of_memory() && start_worker(_snapshot)) { |
| 6197 | 142 _state = NMT_started; |
| 143 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
| 144 return; | |
| 145 } | |
|
9061
4c8bb5e4f68f
8011161: NMT: Memory leak when encountering out of memory error while initializing memory snapshot
zgu
parents:
8810
diff
changeset
|
146 |
|
4c8bb5e4f68f
8011161: NMT: Memory leak when encountering out of memory error while initializing memory snapshot
zgu
parents:
8810
diff
changeset
|
147 delete _snapshot; |
|
4c8bb5e4f68f
8011161: NMT: Memory leak when encountering out of memory error while initializing memory snapshot
zgu
parents:
8810
diff
changeset
|
148 _snapshot = NULL; |
| 6197 | 149 } |
| 150 | |
| 151 // fail to start native memory tracking, shut it down | |
| 152 shutdown(NMT_initialization); | |
| 153 } | |
| 154 | |
| 155 /** | |
| 156 * Shutting down native memory tracking. | |
| 157 * We can not shutdown native memory tracking immediately, so we just | |
| 158 * setup shutdown pending flag, every native memory tracking component | |
| 159 * should orderly shut itself down. | |
| 160 * | |
| 161 * The shutdown sequences: | |
| 162 * 1. MemTracker::shutdown() sets MemTracker to shutdown pending state | |
| 163 * 2. Worker thread calls MemTracker::final_shutdown(), which transites | |
| 164 * MemTracker to final shutdown state. | |
| 165 * 3. At sync point, MemTracker does final cleanup, before sets memory | |
| 166 * tracking level to off to complete shutdown. | |
| 167 */ | |
| 168 void MemTracker::shutdown(ShutdownReason reason) { | |
| 169 if (_tracking_level == NMT_off) return; | |
| 170 | |
| 171 if (_state <= NMT_bootstrapping_single_thread) { | |
| 172 // we still in single thread mode, there is not contention | |
| 173 _state = NMT_shutdown_pending; | |
| 174 _reason = reason; | |
| 175 } else { | |
| 176 // we want to know who initialized shutdown | |
| 177 if ((jint)NMT_started == Atomic::cmpxchg((jint)NMT_shutdown_pending, | |
| 178 (jint*)&_state, (jint)NMT_started)) { | |
| 179 _reason = reason; | |
| 180 } | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 // final phase of shutdown | |
| 185 void MemTracker::final_shutdown() { | |
| 186 // delete all pending recorders and pooled recorders | |
| 187 delete_all_pending_recorders(); | |
| 188 delete_all_pooled_recorders(); | |
| 189 | |
| 190 { | |
| 191 // shared baseline and snapshot are the only objects needed to | |
| 192 // create query results | |
|
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
193 MutexLockerEx locker(_query_lock, true); |
| 6197 | 194 // cleanup baseline data and snapshot |
| 195 _baseline.clear(); | |
| 196 delete _snapshot; | |
| 197 _snapshot = NULL; | |
| 198 } | |
| 199 | |
| 200 // shutdown shared decoder instance, since it is only | |
| 201 // used by native memory tracking so far. | |
| 202 Decoder::shutdown(); | |
| 203 | |
| 204 MemTrackWorker* worker = NULL; | |
| 205 { | |
| 206 ThreadCritical tc; | |
| 207 // can not delete worker inside the thread critical | |
| 208 if (_worker_thread != NULL && Thread::current() == _worker_thread) { | |
| 209 worker = _worker_thread; | |
| 210 _worker_thread = NULL; | |
| 211 } | |
| 212 } | |
| 213 if (worker != NULL) { | |
| 214 delete worker; | |
| 215 } | |
| 216 _state = NMT_final_shutdown; | |
| 217 } | |
| 218 | |
| 219 // delete all pooled recorders | |
| 220 void MemTracker::delete_all_pooled_recorders() { | |
| 221 // free all pooled recorders | |
|
10096
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
222 MemRecorder* volatile cur_head = _pooled_recorders; |
| 6197 | 223 if (cur_head != NULL) { |
| 224 MemRecorder* null_ptr = NULL; | |
| 225 while (cur_head != NULL && (void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, | |
| 226 (void*)&_pooled_recorders, (void*)cur_head)) { | |
| 227 cur_head = _pooled_recorders; | |
| 228 } | |
| 229 if (cur_head != NULL) { | |
| 230 delete cur_head; | |
| 231 _pooled_recorder_count = 0; | |
| 232 } | |
| 233 } | |
| 234 } | |
| 235 | |
| 236 // delete all recorders in pending queue | |
| 237 void MemTracker::delete_all_pending_recorders() { | |
| 238 // free all pending recorders | |
| 239 MemRecorder* pending_head = get_pending_recorders(); | |
| 240 if (pending_head != NULL) { | |
| 241 delete pending_head; | |
| 242 } | |
| 243 } | |
| 244 | |
| 245 /* | |
| 246 * retrieve per-thread recorder of specified thread. | |
| 247 * if thread == NULL, it means global recorder | |
| 248 */ | |
| 249 MemRecorder* MemTracker::get_thread_recorder(JavaThread* thread) { | |
| 250 if (shutdown_in_progress()) return NULL; | |
| 251 | |
| 252 MemRecorder* rc; | |
| 253 if (thread == NULL) { | |
| 254 rc = _global_recorder; | |
| 255 } else { | |
| 256 rc = thread->get_recorder(); | |
| 257 } | |
| 258 | |
| 259 if (rc != NULL && rc->is_full()) { | |
| 260 enqueue_pending_recorder(rc); | |
| 261 rc = NULL; | |
| 262 } | |
| 263 | |
| 264 if (rc == NULL) { | |
| 265 rc = get_new_or_pooled_instance(); | |
| 266 if (thread == NULL) { | |
| 267 _global_recorder = rc; | |
| 268 } else { | |
| 269 thread->set_recorder(rc); | |
| 270 } | |
| 271 } | |
| 272 return rc; | |
| 273 } | |
| 274 | |
| 275 /* | |
| 276 * get a per-thread recorder from pool, or create a new one if | |
| 277 * there is not one available. | |
| 278 */ | |
| 279 MemRecorder* MemTracker::get_new_or_pooled_instance() { | |
| 280 MemRecorder* cur_head = const_cast<MemRecorder*> (_pooled_recorders); | |
| 281 if (cur_head == NULL) { | |
| 282 MemRecorder* rec = new (std::nothrow)MemRecorder(); | |
| 283 if (rec == NULL || rec->out_of_memory()) { | |
| 284 shutdown(NMT_out_of_memory); | |
| 285 if (rec != NULL) { | |
| 286 delete rec; | |
| 287 rec = NULL; | |
| 288 } | |
| 289 } | |
| 290 return rec; | |
| 291 } else { | |
| 292 MemRecorder* next_head = cur_head->next(); | |
| 293 if ((void*)cur_head != Atomic::cmpxchg_ptr((void*)next_head, (void*)&_pooled_recorders, | |
| 294 (void*)cur_head)) { | |
| 295 return get_new_or_pooled_instance(); | |
| 296 } | |
| 297 cur_head->set_next(NULL); | |
| 298 Atomic::dec(&_pooled_recorder_count); | |
|
7971
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
299 cur_head->set_generation(); |
| 6197 | 300 return cur_head; |
| 301 } | |
| 302 } | |
| 303 | |
| 304 /* | |
| 305 * retrieve all recorders in pending queue, and empty the queue | |
| 306 */ | |
| 307 MemRecorder* MemTracker::get_pending_recorders() { | |
| 308 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
| 309 MemRecorder* null_ptr = NULL; | |
| 310 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, (void*)&_merge_pending_queue, | |
| 311 (void*)cur_head)) { | |
| 312 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
| 313 } | |
|
6607
e5bf1c79ed5b
7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
zgu
parents:
6235
diff
changeset
|
314 NOT_PRODUCT(Atomic::store(0, &_pending_recorder_count)); |
| 6197 | 315 return cur_head; |
| 316 } | |
| 317 | |
| 318 /* | |
| 319 * release a recorder to recorder pool. | |
| 320 */ | |
| 321 void MemTracker::release_thread_recorder(MemRecorder* rec) { | |
| 322 assert(rec != NULL, "null recorder"); | |
| 323 // we don't want to pool too many recorders | |
| 324 rec->set_next(NULL); | |
| 325 if (shutdown_in_progress() || _pooled_recorder_count > _thread_count * 2) { | |
| 326 delete rec; | |
| 327 return; | |
| 328 } | |
| 329 | |
| 330 rec->clear(); | |
| 331 MemRecorder* cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
| 332 rec->set_next(cur_head); | |
| 333 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_pooled_recorders, | |
| 334 (void*)cur_head)) { | |
| 335 cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
| 336 rec->set_next(cur_head); | |
| 337 } | |
| 338 Atomic::inc(&_pooled_recorder_count); | |
| 339 } | |
| 340 | |
| 341 // write a record to proper recorder. No lock can be taken from this method | |
| 342 // down. | |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
343 void MemTracker::write_tracking_record(address addr, MEMFLAGS flags, |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
344 size_t size, jint seq, address pc, JavaThread* thread) { |
| 6197 | 345 |
| 6231 | 346 MemRecorder* rc = get_thread_recorder(thread); |
| 6197 | 347 if (rc != NULL) { |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
348 rc->record(addr, flags, size, seq, pc); |
| 6197 | 349 } |
| 350 } | |
| 351 | |
| 352 /** | |
| 353 * enqueue a recorder to pending queue | |
| 354 */ | |
| 355 void MemTracker::enqueue_pending_recorder(MemRecorder* rec) { | |
| 356 assert(rec != NULL, "null recorder"); | |
| 357 | |
| 358 // we are shutting down, so just delete it | |
| 359 if (shutdown_in_progress()) { | |
| 360 rec->set_next(NULL); | |
| 361 delete rec; | |
| 362 return; | |
| 363 } | |
| 364 | |
| 365 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
| 366 rec->set_next(cur_head); | |
| 367 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_merge_pending_queue, | |
| 368 (void*)cur_head)) { | |
| 369 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
| 370 rec->set_next(cur_head); | |
| 371 } | |
|
6607
e5bf1c79ed5b
7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
zgu
parents:
6235
diff
changeset
|
372 NOT_PRODUCT(Atomic::inc(&_pending_recorder_count);) |
| 6197 | 373 } |
| 374 | |
| 375 /* | |
| 376 * The method is called at global safepoint | |
| 377 * during it synchronization process. | |
| 378 * 1. enqueue all JavaThreads' per-thread recorders | |
| 379 * 2. enqueue global recorder | |
| 380 * 3. retrieve all pending recorders | |
| 381 * 4. reset global sequence number generator | |
| 382 * 5. call worker's sync | |
| 383 */ | |
| 384 #define MAX_SAFEPOINTS_TO_SKIP 128 | |
| 385 #define SAFE_SEQUENCE_THRESHOLD 30 | |
| 386 #define HIGH_GENERATION_THRESHOLD 60 | |
|
8810
06db4c0afbf3
8009298: NMT: Special version of class loading/unloading with runThese stresses out NMT
zgu
parents:
7971
diff
changeset
|
387 #define MAX_RECORDER_THREAD_RATIO 30 |
|
11137
c9a5fab39234
8012241: NMT huge memory footprint, it usually leads to OOME
zgu
parents:
10986
diff
changeset
|
388 #define MAX_RECORDER_PER_THREAD 100 |
| 6197 | 389 |
| 390 void MemTracker::sync() { | |
| 391 assert(_tracking_level > NMT_off, "NMT is not enabled"); | |
| 392 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); | |
| 393 | |
| 394 // Some GC tests hit large number of safepoints in short period of time | |
| 395 // without meaningful activities. We should prevent going to | |
| 396 // sync point in these cases, which can potentially exhaust generation buffer. | |
| 397 // Here is the factots to determine if we should go into sync point: | |
| 398 // 1. not to overflow sequence number | |
| 399 // 2. if we are in danger to overflow generation buffer | |
| 400 // 3. how many safepoints we already skipped sync point | |
| 401 if (_state == NMT_started) { | |
| 402 // worker thread is not ready, no one can manage generation | |
| 403 // buffer, so skip this safepoint | |
| 404 if (_worker_thread == NULL) return; | |
| 405 | |
| 406 if (_sync_point_skip_count < MAX_SAFEPOINTS_TO_SKIP) { | |
| 407 int per_seq_in_use = SequenceGenerator::peek() * 100 / max_jint; | |
| 408 int per_gen_in_use = _worker_thread->generations_in_use() * 100 / MAX_GENERATIONS; | |
| 409 if (per_seq_in_use < SAFE_SEQUENCE_THRESHOLD && per_gen_in_use >= HIGH_GENERATION_THRESHOLD) { | |
| 410 _sync_point_skip_count ++; | |
| 411 return; | |
| 412 } | |
| 413 } | |
| 414 { | |
| 415 // This method is running at safepoint, with ThreadCritical lock, | |
| 416 // it should guarantee that NMT is fully sync-ed. | |
| 417 ThreadCritical tc; | |
| 6231 | 418 |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
419 // We can NOT execute NMT sync-point if there are pending tracking ops. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
420 if (_pending_op_count == 0) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
421 SequenceGenerator::reset(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
422 _sync_point_skip_count = 0; |
|
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6781
diff
changeset
|
423 |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
424 // walk all JavaThreads to collect recorders |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
425 SyncThreadRecorderClosure stc; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
426 Threads::threads_do(&stc); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
427 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
428 _thread_count = stc.get_thread_count(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
429 MemRecorder* pending_recorders = get_pending_recorders(); |
| 6231 | 430 |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
431 if (_global_recorder != NULL) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
432 _global_recorder->set_next(pending_recorders); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
433 pending_recorders = _global_recorder; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
434 _global_recorder = NULL; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
435 } |
| 6231 | 436 |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
437 // see if NMT has too many outstanding recorder instances, it usually |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
438 // means that worker thread is lagging behind in processing them. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
439 if (!AutoShutdownNMT) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
440 _slowdown_calling_thread = (MemRecorder::_instance_count > MAX_RECORDER_THREAD_RATIO * _thread_count); |
|
11137
c9a5fab39234
8012241: NMT huge memory footprint, it usually leads to OOME
zgu
parents:
10986
diff
changeset
|
441 } else { |
|
c9a5fab39234
8012241: NMT huge memory footprint, it usually leads to OOME
zgu
parents:
10986
diff
changeset
|
442 // If auto shutdown is on, enforce MAX_RECORDER_PER_THREAD threshold to prevent OOM |
|
c9a5fab39234
8012241: NMT huge memory footprint, it usually leads to OOME
zgu
parents:
10986
diff
changeset
|
443 if (MemRecorder::_instance_count >= _thread_count * MAX_RECORDER_PER_THREAD) { |
|
c9a5fab39234
8012241: NMT huge memory footprint, it usually leads to OOME
zgu
parents:
10986
diff
changeset
|
444 shutdown(NMT_out_of_memory); |
|
c9a5fab39234
8012241: NMT huge memory footprint, it usually leads to OOME
zgu
parents:
10986
diff
changeset
|
445 } |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
446 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
447 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
448 // check _worker_thread with lock to avoid racing condition |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
449 if (_worker_thread != NULL) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
450 _worker_thread->at_sync_point(pending_recorders, InstanceKlass::number_of_instance_classes()); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
451 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
452 assert(SequenceGenerator::peek() == 1, "Should not have memory activities during sync-point"); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
453 } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
454 _sync_point_skip_count ++; |
| 6197 | 455 } |
| 456 } | |
| 457 } | |
| 458 | |
| 459 // now, it is the time to shut whole things off | |
| 460 if (_state == NMT_final_shutdown) { | |
| 461 // walk all JavaThreads to delete all recorders | |
| 462 SyncThreadRecorderClosure stc; | |
| 463 Threads::threads_do(&stc); | |
| 464 // delete global recorder | |
| 465 { | |
| 466 ThreadCritical tc; | |
| 467 if (_global_recorder != NULL) { | |
| 468 delete _global_recorder; | |
| 469 _global_recorder = NULL; | |
| 470 } | |
| 471 } | |
| 6231 | 472 MemRecorder* pending_recorders = get_pending_recorders(); |
| 473 if (pending_recorders != NULL) { | |
| 474 delete pending_recorders; | |
| 475 } | |
| 476 // try at a later sync point to ensure MemRecorder instance drops to zero to | |
| 477 // completely shutdown NMT | |
| 478 if (MemRecorder::_instance_count == 0) { | |
| 479 _state = NMT_shutdown; | |
| 480 _tracking_level = NMT_off; | |
| 481 } | |
| 6197 | 482 } |
| 483 } | |
| 484 | |
| 485 /* | |
| 486 * Start worker thread. | |
| 487 */ | |
|
10096
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
488 bool MemTracker::start_worker(MemSnapshot* snapshot) { |
|
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
489 assert(_worker_thread == NULL && _snapshot != NULL, "Just Check"); |
|
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
490 _worker_thread = new (std::nothrow) MemTrackWorker(snapshot); |
|
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
491 if (_worker_thread == NULL) { |
|
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
492 return false; |
|
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
493 } else if (_worker_thread->has_error()) { |
|
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
494 delete _worker_thread; |
|
35f8765422b9
8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
zgu
parents:
9061
diff
changeset
|
495 _worker_thread = NULL; |
| 6197 | 496 return false; |
| 497 } | |
| 498 _worker_thread->start(); | |
| 499 return true; | |
| 500 } | |
| 501 | |
| 502 /* | |
| 503 * We need to collect a JavaThread's per-thread recorder | |
| 504 * before it exits. | |
| 505 */ | |
| 506 void MemTracker::thread_exiting(JavaThread* thread) { | |
| 507 if (is_on()) { | |
| 508 MemRecorder* rec = thread->get_recorder(); | |
| 509 if (rec != NULL) { | |
| 510 enqueue_pending_recorder(rec); | |
| 511 thread->set_recorder(NULL); | |
| 512 } | |
| 513 } | |
| 514 } | |
| 515 | |
| 516 // baseline current memory snapshot | |
| 517 bool MemTracker::baseline() { | |
| 10148 | 518 MutexLocker lock(_query_lock); |
| 6197 | 519 MemSnapshot* snapshot = get_snapshot(); |
| 520 if (snapshot != NULL) { | |
| 521 return _baseline.baseline(*snapshot, false); | |
| 522 } | |
| 523 return false; | |
| 524 } | |
| 525 | |
| 526 // print memory usage from current snapshot | |
| 527 bool MemTracker::print_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
| 528 MemBaseline baseline; | |
| 10148 | 529 MutexLocker lock(_query_lock); |
| 6197 | 530 MemSnapshot* snapshot = get_snapshot(); |
| 531 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
| 532 BaselineReporter reporter(out, unit); | |
| 533 reporter.report_baseline(baseline, summary_only); | |
| 534 return true; | |
| 535 } | |
| 536 return false; | |
| 537 } | |
| 538 | |
|
7971
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
539 // Whitebox API for blocking until the current generation of NMT data has been merged |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
540 bool MemTracker::wbtest_wait_for_data_merge() { |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
541 // NMT can't be shutdown while we're holding _query_lock |
| 10148 | 542 MutexLocker lock(_query_lock); |
|
7971
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
543 assert(_worker_thread != NULL, "Invalid query"); |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
544 // the generation at query time, so NMT will spin till this generation is processed |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
545 unsigned long generation_at_query_time = SequenceGenerator::current_generation(); |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
546 unsigned long current_processing_generation = _processing_generation; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
547 // if generation counter overflown |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
548 bool generation_overflown = (generation_at_query_time < current_processing_generation); |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
549 long generations_to_wrap = MAX_UNSIGNED_LONG - current_processing_generation; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
550 // spin |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
551 while (!shutdown_in_progress()) { |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
552 if (!generation_overflown) { |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
553 if (current_processing_generation > generation_at_query_time) { |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
554 return true; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
555 } |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
556 } else { |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
557 assert(generations_to_wrap >= 0, "Sanity check"); |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
558 long current_generations_to_wrap = MAX_UNSIGNED_LONG - current_processing_generation; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
559 assert(current_generations_to_wrap >= 0, "Sanity check"); |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
560 // to overflow an unsigned long should take long time, so to_wrap check should be sufficient |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
561 if (current_generations_to_wrap > generations_to_wrap && |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
562 current_processing_generation > generation_at_query_time) { |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
563 return true; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
564 } |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
565 } |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
566 |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
567 // if worker thread is idle, but generation is not advancing, that means |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
568 // there is not safepoint to let NMT advance generation, force one. |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
569 if (_worker_thread_idle) { |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
570 VM_ForceSafepoint vfs; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
571 VMThread::execute(&vfs); |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
572 } |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
573 MemSnapshot* snapshot = get_snapshot(); |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
574 if (snapshot == NULL) { |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
575 return false; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
576 } |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
577 snapshot->wait(1000); |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
578 current_processing_generation = _processing_generation; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
579 } |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
580 // We end up here if NMT is shutting down before our data has been merged |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
581 return false; |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
582 } |
|
4102b59539ce
8005012: Add WB APIs to better support NMT testing
ctornqvi
parents:
7464
diff
changeset
|
583 |
| 6197 | 584 // compare memory usage between current snapshot and baseline |
| 585 bool MemTracker::compare_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
| 10148 | 586 MutexLocker lock(_query_lock); |
| 6197 | 587 if (_baseline.baselined()) { |
| 588 MemBaseline baseline; | |
| 589 MemSnapshot* snapshot = get_snapshot(); | |
| 590 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
| 591 BaselineReporter reporter(out, unit); | |
| 592 reporter.diff_baselines(baseline, _baseline, summary_only); | |
| 593 return true; | |
| 594 } | |
| 595 } | |
| 596 return false; | |
| 597 } | |
| 598 | |
| 599 #ifndef PRODUCT | |
| 600 void MemTracker::walk_stack(int toSkip, char* buf, int len) { | |
| 601 int cur_len = 0; | |
| 602 char tmp[1024]; | |
| 603 address pc; | |
| 604 | |
| 605 while (cur_len < len) { | |
| 606 pc = os::get_caller_pc(toSkip + 1); | |
| 607 if (pc != NULL && os::dll_address_to_function_name(pc, tmp, sizeof(tmp), NULL)) { | |
| 608 jio_snprintf(&buf[cur_len], (len - cur_len), "%s\n", tmp); | |
| 609 cur_len = (int)strlen(buf); | |
| 610 } else { | |
| 611 buf[cur_len] = '\0'; | |
| 612 break; | |
| 613 } | |
| 614 toSkip ++; | |
| 615 } | |
| 616 } | |
| 617 | |
| 618 void MemTracker::print_tracker_stats(outputStream* st) { | |
| 619 st->print_cr("\nMemory Tracker Stats:"); | |
| 620 st->print_cr("\tMax sequence number = %d", SequenceGenerator::max_seq_num()); | |
| 621 st->print_cr("\tthead count = %d", _thread_count); | |
| 622 st->print_cr("\tArena instance = %d", Arena::_instance_count); | |
| 623 st->print_cr("\tpooled recorder count = %d", _pooled_recorder_count); | |
| 624 st->print_cr("\tqueued recorder count = %d", _pending_recorder_count); | |
| 625 st->print_cr("\tmemory recorder instance count = %d", MemRecorder::_instance_count); | |
| 626 if (_worker_thread != NULL) { | |
| 627 st->print_cr("\tWorker thread:"); | |
| 628 st->print_cr("\t\tSync point count = %d", _worker_thread->_sync_point_count); | |
| 629 st->print_cr("\t\tpending recorder count = %d", _worker_thread->count_pending_recorders()); | |
| 630 st->print_cr("\t\tmerge count = %d", _worker_thread->_merge_count); | |
| 631 } else { | |
| 632 st->print_cr("\tWorker thread is not started"); | |
| 633 } | |
| 634 st->print_cr(" "); | |
| 635 | |
| 636 if (_snapshot != NULL) { | |
| 637 _snapshot->print_snapshot_stats(st); | |
| 638 } else { | |
| 639 st->print_cr("No snapshot"); | |
| 640 } | |
| 641 } | |
| 642 #endif | |
| 643 | |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
644 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
645 // Tracker Implementation |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
646 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
647 /* |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
648 * Create a tracker. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
649 * This is a fairly complicated constructor, as it has to make two important decisions: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
650 * 1) Does it need to take ThreadCritical lock to write tracking record |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
651 * 2) Does it need to pre-reserve a sequence number for the tracking record |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
652 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
653 * The rules to determine if ThreadCritical is needed: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
654 * 1. When nmt is in single-threaded bootstrapping mode, no lock is needed as VM |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
655 * still in single thread mode. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
656 * 2. For all threads other than JavaThread, ThreadCritical is needed |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
657 * to write to recorders to global recorder. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
658 * 3. For JavaThreads that are no longer visible by safepoint, also |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
659 * need to take ThreadCritical and records are written to global |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
660 * recorders, since these threads are NOT walked by Threads.do_thread(). |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
661 * 4. JavaThreads that are running in safepoint-safe states do not stop |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
662 * for safepoints, ThreadCritical lock should be taken to write |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
663 * memory records. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
664 * 5. JavaThreads that are running in VM state do not need any lock and |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
665 * records are written to per-thread recorders. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
666 * 6. For a thread has yet to attach VM 'Thread', they need to take |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
667 * ThreadCritical to write to global recorder. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
668 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
669 * The memory operations that need pre-reserve sequence numbers: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
670 * The memory operations that "release" memory blocks and the |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
671 * operations can fail, need to pre-reserve sequence number. They |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
672 * are realloc, uncommit and release. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
673 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
674 * The reason for pre-reserve sequence number, is to prevent race condition: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
675 * Thread 1 Thread 2 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
676 * <release> |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
677 * <allocate> |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
678 * <write allocate record> |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
679 * <write release record> |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
680 * if Thread 2 happens to obtain the memory address Thread 1 just released, |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
681 * then NMT can mistakenly report the memory is free. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
682 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
683 * Noticeably, free() does not need pre-reserve sequence number, because the call |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
684 * does not fail, so we can alway write "release" record before the memory is actaully |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
685 * freed. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
686 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
687 * For realloc, uncommit and release, following coding pattern should be used: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
688 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
689 * MemTracker::Tracker tkr = MemTracker::get_realloc_tracker(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
690 * ptr = ::realloc(...); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
691 * if (ptr == NULL) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
692 * tkr.record(...) |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
693 * } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
694 * tkr.discard(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
695 * } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
696 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
697 * MemTracker::Tracker tkr = MemTracker::get_virtual_memory_uncommit_tracker(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
698 * if (uncommit(...)) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
699 * tkr.record(...); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
700 * } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
701 * tkr.discard(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
702 * } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
703 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
704 * MemTracker::Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
705 * if (release(...)) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
706 * tkr.record(...); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
707 * } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
708 * tkr.discard(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
709 * } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
710 * |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
711 * Since pre-reserved sequence number is only good for the generation that it is acquired, |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
712 * when there is pending Tracker that reserved sequence number, NMT sync-point has |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
713 * to be skipped to prevent from advancing generation. This is done by inc and dec |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
714 * MemTracker::_pending_op_count, when MemTracker::_pending_op_count > 0, NMT sync-point is skipped. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
715 * Not all pre-reservation of sequence number will increment pending op count. For JavaThreads |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
716 * that honor safepoints, safepoint can not occur during the memory operations, so the |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
717 * pre-reserved sequence number won't cross the generation boundry. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
718 */ |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
719 MemTracker::Tracker::Tracker(MemoryOperation op, Thread* thr) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
720 _op = NoOp; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
721 _seq = 0; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
722 if (MemTracker::is_on()) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
723 _java_thread = NULL; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
724 _op = op; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
725 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
726 // figure out if ThreadCritical lock is needed to write this operation |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
727 // to MemTracker |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
728 if (MemTracker::is_single_threaded_bootstrap()) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
729 thr = NULL; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
730 } else if (thr == NULL) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
731 // don't use Thread::current(), since it is possible that |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
732 // the calling thread has yet to attach to VM 'Thread', |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
733 // which will result assertion failure |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
734 thr = ThreadLocalStorage::thread(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
735 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
736 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
737 if (thr != NULL) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
738 // Check NMT load |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
739 MemTracker::check_NMT_load(thr); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
740 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
741 if (thr->is_Java_thread() && ((JavaThread*)thr)->is_safepoint_visible()) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
742 _java_thread = (JavaThread*)thr; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
743 JavaThreadState state = _java_thread->thread_state(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
744 // JavaThreads that are safepoint safe, can run through safepoint, |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
745 // so ThreadCritical is needed to ensure no threads at safepoint create |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
746 // new records while the records are being gathered and the sequence number is changing |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
747 _need_thread_critical_lock = |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
748 SafepointSynchronize::safepoint_safe(_java_thread, state); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
749 } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
750 _need_thread_critical_lock = true; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
751 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
752 } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
753 _need_thread_critical_lock |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
754 = !MemTracker::is_single_threaded_bootstrap(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
755 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
756 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
757 // see if we need to pre-reserve sequence number for this operation |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
758 if (_op == Realloc || _op == Uncommit || _op == Release) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
759 if (_need_thread_critical_lock) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
760 ThreadCritical tc; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
761 MemTracker::inc_pending_op_count(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
762 _seq = SequenceGenerator::next(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
763 } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
764 // for the threads that honor safepoints, no safepoint can occur |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
765 // during the lifespan of tracker, so we don't need to increase |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
766 // pending op count. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
767 _seq = SequenceGenerator::next(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
768 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
769 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
770 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
771 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
772 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
773 void MemTracker::Tracker::discard() { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
774 if (MemTracker::is_on() && _seq != 0) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
775 if (_need_thread_critical_lock) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
776 ThreadCritical tc; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
777 MemTracker::dec_pending_op_count(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
778 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
779 _seq = 0; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
780 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
781 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
782 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
783 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
784 void MemTracker::Tracker::record(address old_addr, address new_addr, size_t size, |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
785 MEMFLAGS flags, address pc) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
786 assert(old_addr != NULL && new_addr != NULL, "Sanity check"); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
787 assert(_op == Realloc || _op == NoOp, "Wrong call"); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
788 if (MemTracker::is_on() && NMT_CAN_TRACK(flags) && _op != NoOp) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
789 assert(_seq > 0, "Need pre-reserve sequence number"); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
790 if (_need_thread_critical_lock) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
791 ThreadCritical tc; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
792 // free old address, use pre-reserved sequence number |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
793 MemTracker::write_tracking_record(old_addr, MemPointerRecord::free_tag(), |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
794 0, _seq, pc, _java_thread); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
795 MemTracker::write_tracking_record(new_addr, flags | MemPointerRecord::malloc_tag(), |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
796 size, SequenceGenerator::next(), pc, _java_thread); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
797 // decrement MemTracker pending_op_count |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
798 MemTracker::dec_pending_op_count(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
799 } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
800 // free old address, use pre-reserved sequence number |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
801 MemTracker::write_tracking_record(old_addr, MemPointerRecord::free_tag(), |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
802 0, _seq, pc, _java_thread); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
803 MemTracker::write_tracking_record(new_addr, flags | MemPointerRecord::malloc_tag(), |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
804 size, SequenceGenerator::next(), pc, _java_thread); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
805 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
806 _seq = 0; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
807 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
808 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
809 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
810 void MemTracker::Tracker::record(address addr, size_t size, MEMFLAGS flags, address pc) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
811 // OOM already? |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
812 if (addr == NULL) return; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
813 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
814 if (MemTracker::is_on() && NMT_CAN_TRACK(flags) && _op != NoOp) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
815 bool pre_reserved_seq = (_seq != 0); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
816 address pc = CALLER_CALLER_PC; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
817 MEMFLAGS orig_flags = flags; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
818 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
819 // or the tagging flags |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
820 switch(_op) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
821 case Malloc: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
822 flags |= MemPointerRecord::malloc_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
823 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
824 case Free: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
825 flags = MemPointerRecord::free_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
826 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
827 case Realloc: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
828 fatal("Use the other Tracker::record()"); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
829 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
830 case Reserve: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
831 case ReserveAndCommit: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
832 flags |= MemPointerRecord::virtual_memory_reserve_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
833 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
834 case Commit: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
835 flags = MemPointerRecord::virtual_memory_commit_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
836 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
837 case Type: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
838 flags |= MemPointerRecord::virtual_memory_type_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
839 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
840 case Uncommit: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
841 assert(pre_reserved_seq, "Need pre-reserve sequence number"); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
842 flags = MemPointerRecord::virtual_memory_uncommit_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
843 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
844 case Release: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
845 assert(pre_reserved_seq, "Need pre-reserve sequence number"); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
846 flags = MemPointerRecord::virtual_memory_release_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
847 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
848 case ArenaSize: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
849 // a bit of hack here, add a small postive offset to arena |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
850 // address for its size record, so the size record is sorted |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
851 // right after arena record. |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
852 flags = MemPointerRecord::arena_size_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
853 addr += sizeof(void*); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
854 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
855 case StackRelease: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
856 flags = MemPointerRecord::virtual_memory_release_tag(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
857 break; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
858 default: |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
859 ShouldNotReachHere(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
860 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
861 |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
862 // write memory tracking record |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
863 if (_need_thread_critical_lock) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
864 ThreadCritical tc; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
865 if (_seq == 0) _seq = SequenceGenerator::next(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
866 MemTracker::write_tracking_record(addr, flags, size, _seq, pc, _java_thread); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
867 if (_op == ReserveAndCommit) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
868 MemTracker::write_tracking_record(addr, orig_flags | MemPointerRecord::virtual_memory_commit_tag(), |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
869 size, SequenceGenerator::next(), pc, _java_thread); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
870 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
871 if (pre_reserved_seq) MemTracker::dec_pending_op_count(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
872 } else { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
873 if (_seq == 0) _seq = SequenceGenerator::next(); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
874 MemTracker::write_tracking_record(addr, flags, size, _seq, pc, _java_thread); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
875 if (_op == ReserveAndCommit) { |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
876 MemTracker::write_tracking_record(addr, orig_flags | MemPointerRecord::virtual_memory_commit_tag(), |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
877 size, SequenceGenerator::next(), pc, _java_thread); |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
878 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
879 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
880 _seq = 0; |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
881 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
882 } |
|
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10355
diff
changeset
|
883 |