1 /*
2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
37
38 class BaselineTTYOutputer : public BaselineOutputer {
39 public:
40 BaselineTTYOutputer(outputStream* st) { }
41 };
42
43 class MemTracker : AllStatic {
44 public:
45 enum ShutdownReason {
46 NMT_shutdown_none, // no shutdown requested
47 NMT_shutdown_user, // user requested shutdown
48 NMT_normal, // normal shutdown, process exit
49 NMT_out_of_memory, // shutdown due to out of memory
50 NMT_initialization, // shutdown due to initialization failure
51 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag
52 NMT_error_reporting, // shutdown by vmError::report_and_die()
53 NMT_out_of_generation, // running out of generation queue
54 NMT_sequence_overflow // overflow the sequence number
55 };
56
57
58 public:
59 static inline void init_tracking_options(const char* option_line) { }
60 static inline bool is_on() { return false; }
61 static const char* reason() { return "Native memory tracking is not implemented"; }
62 static inline bool can_walk_stack() { return false; }
63
64 static inline void bootstrap_single_thread() { }
65 static inline void bootstrap_multi_thread() { }
66 static inline void start() { }
67
68 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags,
69 address pc = 0, Thread* thread = NULL) { }
70 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { }
71 static inline void record_realloc(address old_addr, address new_addr, size_t size,
72 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { }
73 static inline void record_arena_size(address addr, size_t size) { }
74 static inline void record_virtual_memory_reserve(address addr, size_t size,
75 address pc = 0, Thread* thread = NULL) { }
76 static inline void record_virtual_memory_commit(address addr, size_t size,
77 address pc = 0, Thread* thread = NULL) { }
78 static inline void record_virtual_memory_uncommit(address addr, size_t size,
79 Thread* thread = NULL) { }
80 static inline void record_virtual_memory_release(address addr, size_t size,
81 Thread* thread = NULL) { }
82 static inline void record_virtual_memory_type(address base, MEMFLAGS flags,
83 Thread* thread = NULL) { }
84 static inline bool baseline() { return false; }
85 static inline bool has_baseline() { return false; }
86
87 static inline void set_autoShutdown(bool value) { }
88 static void shutdown(ShutdownReason reason) { }
89 static inline bool shutdown_in_progress() { return false; }
90 static bool print_memory_usage(BaselineOutputer& out, size_t unit,
91 bool summary_only = true) { return false; }
92 static bool compare_memory_usage(BaselineOutputer& out, size_t unit,
93 bool summary_only = true) { return false; }
94
95 static bool wbtest_wait_for_data_merge() { return false; }
96
97 static inline void sync() { }
98 static inline void thread_exiting(JavaThread* thread) { }
99 };
100
101
102 #else // !INCLUDE_NMT
103
148 * MemTracker is the 'gate' class to native memory tracking runtime.
149 */
150 class MemTracker : AllStatic {
151 friend class GenerationData;
152 friend class MemTrackWorker;
153 friend class MemSnapshot;
154 friend class SyncThreadRecorderClosure;
155
156 // NMT state
157 enum NMTStates {
158 NMT_uninited, // not yet initialized
159 NMT_bootstrapping_single_thread, // bootstrapping, VM is in single thread mode
160 NMT_bootstrapping_multi_thread, // bootstrapping, VM is about to enter multi-thread mode
161 NMT_started, // NMT fully started
162 NMT_shutdown_pending, // shutdown pending
163 NMT_final_shutdown, // in final phase of shutdown
164 NMT_shutdown // shutdown
165 };
166
167 public:
168 // native memory tracking level
169 enum NMTLevel {
170 NMT_off, // native memory tracking is off
171 NMT_summary, // don't track callsite
172 NMT_detail // track callsite also
173 };
174
175 enum ShutdownReason {
176 NMT_shutdown_none, // no shutdown requested
177 NMT_shutdown_user, // user requested shutdown
178 NMT_normal, // normal shutdown, process exit
179 NMT_out_of_memory, // shutdown due to out of memory
180 NMT_initialization, // shutdown due to initialization failure
181 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag
182 NMT_error_reporting, // shutdown by vmError::report_and_die()
183 NMT_out_of_generation, // running out of generation queue
184 NMT_sequence_overflow // overflow the sequence number
185 };
186
187 public:
259 static inline bool shutdown_in_progress() {
260 return (_state >= NMT_shutdown_pending);
261 }
262
263 // bootstrap native memory tracking, so it can start to collect raw data
264 // before worker thread can start
265
266 // the first phase of bootstrapping, when VM still in single-threaded mode
267 static void bootstrap_single_thread();
268 // the second phase of bootstrapping, VM is about or already in multi-threaded mode
269 static void bootstrap_multi_thread();
270
271
272 // start() has to be called when VM still in single thread mode, but after
273 // command line option parsing is done.
274 static void start();
275
276 // record a 'malloc' call
277 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags,
278 address pc = 0, Thread* thread = NULL) {
279 if (is_on() && NMT_CAN_TRACK(flags)) {
280 assert(size > 0, "Sanity check");
281 create_memory_record(addr, (flags|MemPointerRecord::malloc_tag()), size, pc, thread);
282 }
283 }
284 // record a 'free' call
285 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) {
286 if (is_on() && NMT_CAN_TRACK(flags)) {
287 create_memory_record(addr, MemPointerRecord::free_tag(), 0, 0, thread);
288 }
289 }
290 // record a 'realloc' call
291 static inline void record_realloc(address old_addr, address new_addr, size_t size,
292 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) {
293 if (is_on() && NMT_CAN_TRACK(flags)) {
294 assert(size > 0, "Sanity check");
295 record_free(old_addr, flags, thread);
296 record_malloc(new_addr, size, flags, pc, thread);
297 }
298 }
299
300 // record arena memory size
301 static inline void record_arena_size(address addr, size_t size) {
302 // we add a positive offset to arena address, so we can have arena memory record
303 // sorted after arena record
304 if (is_on() && !UseMallocOnly) {
305 assert(addr != NULL, "Sanity check");
306 create_memory_record((addr + sizeof(void*)), MemPointerRecord::arena_size_tag(), size,
307 DEBUG_CALLER_PC, NULL);
308 }
309 }
310
311 // record a virtual memory 'reserve' call
312 static inline void record_virtual_memory_reserve(address addr, size_t size,
313 address pc = 0, Thread* thread = NULL) {
314 if (is_on()) {
315 assert(size > 0, "Sanity check");
316 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag(),
317 size, pc, thread);
318 }
319 }
320
321 static inline void record_thread_stack(address addr, size_t size, Thread* thr,
322 address pc = 0) {
323 if (is_on()) {
324 assert(size > 0 && thr != NULL, "Sanity check");
325 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag() | mtThreadStack,
326 size, pc, thr);
327 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag() | mtThreadStack,
328 size, pc, thr);
329 }
330 }
331
332 static inline void release_thread_stack(address addr, size_t size, Thread* thr) {
333 if (is_on()) {
334 assert(size > 0 && thr != NULL, "Sanity check");
335 assert(!thr->is_Java_thread(), "too early");
336 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag() | mtThreadStack,
337 size, DEBUG_CALLER_PC, thr);
338 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag() | mtThreadStack,
339 size, DEBUG_CALLER_PC, thr);
340 }
341 }
342
343 // record a virtual memory 'commit' call
344 static inline void record_virtual_memory_commit(address addr, size_t size,
345 address pc, Thread* thread = NULL) {
346 if (is_on()) {
347 assert(size > 0, "Sanity check");
348 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag(),
349 size, pc, thread);
350 }
351 }
352
353 // record a virtual memory 'uncommit' call
354 static inline void record_virtual_memory_uncommit(address addr, size_t size,
355 Thread* thread = NULL) {
356 if (is_on()) {
357 assert(size > 0, "Sanity check");
358 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag(),
359 size, DEBUG_CALLER_PC, thread);
360 }
361 }
362
363 // record a virtual memory 'release' call
364 static inline void record_virtual_memory_release(address addr, size_t size,
365 Thread* thread = NULL) {
366 if (is_on()) {
367 assert(size > 0, "Sanity check");
368 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag(),
369 size, DEBUG_CALLER_PC, thread);
370 }
371 }
372
373 // record memory type on virtual memory base address
374 static inline void record_virtual_memory_type(address base, MEMFLAGS flags,
375 Thread* thread = NULL) {
376 if (is_on()) {
377 assert(base > 0, "wrong base address");
378 assert((flags & (~mt_masks)) == 0, "memory type only");
379 create_memory_record(base, (flags | MemPointerRecord::virtual_memory_type_tag()),
380 0, DEBUG_CALLER_PC, thread);
381 }
382 }
383
384
385 // create memory baseline of current memory snapshot
386 static bool baseline();
387 // is there a memory baseline
388 static bool has_baseline() {
389 return _baseline.baselined();
390 }
391
392 // print memory usage from current snapshot
393 static bool print_memory_usage(BaselineOutputer& out, size_t unit,
394 bool summary_only = true);
395 // compare memory usage between current snapshot and baseline
396 static bool compare_memory_usage(BaselineOutputer& out, size_t unit,
397 bool summary_only = true);
398
399 // the version for whitebox testing support, it ensures that all memory
400 // activities before this method call, are reflected in the snapshot
401 // database.
427 static void final_shutdown();
428
429 protected:
430 // retrieve per-thread recorder of the specified thread.
431 // if the recorder is full, it will be enqueued to overflow
432 // queue, a new recorder is acquired from recorder pool or a
433 // new instance is created.
434 // when thread == NULL, it means global recorder
435 static MemRecorder* get_thread_recorder(JavaThread* thread);
436
437 // per-thread recorder pool
438 static void release_thread_recorder(MemRecorder* rec);
439 static void delete_all_pooled_recorders();
440
441 // pending recorder queue. Recorders are queued to pending queue
442 // when they are overflowed or collected at nmt sync point.
443 static void enqueue_pending_recorder(MemRecorder* rec);
444 static MemRecorder* get_pending_recorders();
445 static void delete_all_pending_recorders();
446
447 private:
448 // retrieve a pooled memory record or create new one if there is not
449 // one available
450 static MemRecorder* get_new_or_pooled_instance();
451 static void create_memory_record(address addr, MEMFLAGS type,
452 size_t size, address pc, Thread* thread);
453 static void create_record_in_recorder(address addr, MEMFLAGS type,
454 size_t size, address pc, JavaThread* thread);
455
456 static void set_current_processing_generation(unsigned long generation) {
457 _worker_thread_idle = false;
458 _processing_generation = generation;
459 }
460
461 static void report_worker_idle() {
462 _worker_thread_idle = true;
463 }
464
465 private:
466 // global memory snapshot
505 static int _sync_point_skip_count;
506
507 // if the tracker is properly intialized
508 static bool _is_tracker_ready;
509 // tracking level (off, summary and detail)
510 static enum NMTLevel _tracking_level;
511
512 // current nmt state
513 static volatile enum NMTStates _state;
514 // the reason for shutting down nmt
515 static enum ShutdownReason _reason;
516 // the generation that NMT is processing
517 static volatile unsigned long _processing_generation;
518 // although NMT is still procesing current generation, but
519 // there is not more recorder to process, set idle state
520 static volatile bool _worker_thread_idle;
521
522 // if NMT should slow down calling thread to allow
523 // worker thread to catch up
524 static volatile bool _slowdown_calling_thread;
525 };
526
527 #endif // !INCLUDE_NMT
528
529 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP
|
1 /*
2 * Copyright (c) 2012, 2013, 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 *
37
38 class BaselineTTYOutputer : public BaselineOutputer {
39 public:
40 BaselineTTYOutputer(outputStream* st) { }
41 };
42
43 class MemTracker : AllStatic {
44 public:
45 enum ShutdownReason {
46 NMT_shutdown_none, // no shutdown requested
47 NMT_shutdown_user, // user requested shutdown
48 NMT_normal, // normal shutdown, process exit
49 NMT_out_of_memory, // shutdown due to out of memory
50 NMT_initialization, // shutdown due to initialization failure
51 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag
52 NMT_error_reporting, // shutdown by vmError::report_and_die()
53 NMT_out_of_generation, // running out of generation queue
54 NMT_sequence_overflow // overflow the sequence number
55 };
56
57 class Tracker {
58 public:
59 void discard() { }
60
61 void record(address addr, size_t size = 0, MEMFLAGS flags = mtNone, address pc = NULL) { }
62 void record(address old_addr, address new_addr, size_t size,
63 MEMFLAGS flags, address pc = NULL) { }
64 };
65
66
67
68 public:
69 static inline void init_tracking_options(const char* option_line) { }
70 static inline bool is_on() { return false; }
71 static const char* reason() { return "Native memory tracking is not implemented"; }
72 static inline bool can_walk_stack() { return false; }
73
74 static inline void bootstrap_single_thread() { }
75 static inline void bootstrap_multi_thread() { }
76 static inline void start() { }
77
78 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags,
79 address pc = 0, Thread* thread = NULL) { }
80 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { }
81 static inline void record_arena_size(address addr, size_t size) { }
82 static inline void record_virtual_memory_reserve(address addr, size_t size,
83 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { }
84 static inline void record_virtual_memory_reserve_and_commit(address addr, size_t size,
85 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { }
86 static inline void record_virtual_memory_commit(address addr, size_t size,
87 address pc = 0, Thread* thread = NULL) { }
88 static inline void record_virtual_memory_type(address base, MEMFLAGS flags,
89 Thread* thread = NULL) { }
90 static inline Tracker get_realloc_tracker() { return Tracker(); }
91 static inline Tracker get_virtual_memory_uncommit_tracker() { return Tracker(); }
92 static inline Tracker get_virtual_memory_release_tracker() { return Tracker(); }
93 static inline bool baseline() { return false; }
94 static inline bool has_baseline() { return false; }
95
96 static inline void set_autoShutdown(bool value) { }
97 static void shutdown(ShutdownReason reason) { }
98 static inline bool shutdown_in_progress() { return false; }
99 static bool print_memory_usage(BaselineOutputer& out, size_t unit,
100 bool summary_only = true) { return false; }
101 static bool compare_memory_usage(BaselineOutputer& out, size_t unit,
102 bool summary_only = true) { return false; }
103
104 static bool wbtest_wait_for_data_merge() { return false; }
105
106 static inline void sync() { }
107 static inline void thread_exiting(JavaThread* thread) { }
108 };
109
110
111 #else // !INCLUDE_NMT
112
157 * MemTracker is the 'gate' class to native memory tracking runtime.
158 */
159 class MemTracker : AllStatic {
160 friend class GenerationData;
161 friend class MemTrackWorker;
162 friend class MemSnapshot;
163 friend class SyncThreadRecorderClosure;
164
165 // NMT state
166 enum NMTStates {
167 NMT_uninited, // not yet initialized
168 NMT_bootstrapping_single_thread, // bootstrapping, VM is in single thread mode
169 NMT_bootstrapping_multi_thread, // bootstrapping, VM is about to enter multi-thread mode
170 NMT_started, // NMT fully started
171 NMT_shutdown_pending, // shutdown pending
172 NMT_final_shutdown, // in final phase of shutdown
173 NMT_shutdown // shutdown
174 };
175
176 public:
177 class Tracker : public StackObj {
178 friend class MemTracker;
179 public:
180 enum MemoryOperation {
181 NoOp, // no op
182 Malloc, // malloc
183 Realloc, // realloc
184 Free, // free
185 Reserve, // virtual memory reserve
186 Commit, // virtual memory commit
187 ReserveAndCommit, // virtual memory reserve and commit
188 StackAlloc = ReserveAndCommit, // allocate thread stack
189 Type, // assign virtual memory type
190 Uncommit, // virtual memory uncommit
191 Release, // virtual memory release
192 ArenaSize, // set arena size
193 StackRelease // release thread stack
194 };
195
196
197 protected:
198 Tracker(MemoryOperation op, Thread* thr = NULL);
199
200 public:
201 void discard();
202
203 void record(address addr, size_t size = 0, MEMFLAGS flags = mtNone, address pc = NULL);
204 void record(address old_addr, address new_addr, size_t size,
205 MEMFLAGS flags, address pc = NULL);
206
207 private:
208 bool _need_thread_critical_lock;
209 JavaThread* _java_thread;
210 MemoryOperation _op; // memory operation
211 jint _seq; // reserved sequence number
212 };
213
214
215 public:
216 // native memory tracking level
217 enum NMTLevel {
218 NMT_off, // native memory tracking is off
219 NMT_summary, // don't track callsite
220 NMT_detail // track callsite also
221 };
222
223 enum ShutdownReason {
224 NMT_shutdown_none, // no shutdown requested
225 NMT_shutdown_user, // user requested shutdown
226 NMT_normal, // normal shutdown, process exit
227 NMT_out_of_memory, // shutdown due to out of memory
228 NMT_initialization, // shutdown due to initialization failure
229 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag
230 NMT_error_reporting, // shutdown by vmError::report_and_die()
231 NMT_out_of_generation, // running out of generation queue
232 NMT_sequence_overflow // overflow the sequence number
233 };
234
235 public:
307 static inline bool shutdown_in_progress() {
308 return (_state >= NMT_shutdown_pending);
309 }
310
311 // bootstrap native memory tracking, so it can start to collect raw data
312 // before worker thread can start
313
314 // the first phase of bootstrapping, when VM still in single-threaded mode
315 static void bootstrap_single_thread();
316 // the second phase of bootstrapping, VM is about or already in multi-threaded mode
317 static void bootstrap_multi_thread();
318
319
320 // start() has to be called when VM still in single thread mode, but after
321 // command line option parsing is done.
322 static void start();
323
324 // record a 'malloc' call
325 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags,
326 address pc = 0, Thread* thread = NULL) {
327 Tracker tkr(Tracker::Malloc, thread);
328 tkr.record(addr, size, flags, pc);
329 }
330 // record a 'free' call
331 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) {
332 Tracker tkr(Tracker::Free, thread);
333 tkr.record(addr, 0, flags, DEBUG_CALLER_PC);
334 }
335
336 static inline void record_arena_size(address addr, size_t size) {
337 Tracker tkr(Tracker::ArenaSize);
338 tkr.record(addr, size);
339 }
340
341 // record a virtual memory 'reserve' call
342 static inline void record_virtual_memory_reserve(address addr, size_t size,
343 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) {
344 assert(size > 0, "Sanity check");
345 Tracker tkr(Tracker::Reserve, thread);
346 tkr.record(addr, size, flags, pc);
347 }
348
349 static inline void record_thread_stack(address addr, size_t size, Thread* thr,
350 address pc = 0) {
351 Tracker tkr(Tracker::StackAlloc, thr);
352 tkr.record(addr, size, mtThreadStack, pc);
353 }
354
355 static inline void release_thread_stack(address addr, size_t size, Thread* thr) {
356 Tracker tkr(Tracker::StackRelease, thr);
357 tkr.record(addr, size, mtThreadStack, DEBUG_CALLER_PC);
358 }
359
360 // record a virtual memory 'commit' call
361 static inline void record_virtual_memory_commit(address addr, size_t size,
362 address pc, Thread* thread = NULL) {
363 Tracker tkr(Tracker::Commit, thread);
364 tkr.record(addr, size, mtNone, pc);
365 }
366
367 static inline void record_virtual_memory_reserve_and_commit(address addr, size_t size,
368 MEMFLAGS flags, address pc, Thread* thread = NULL) {
369 Tracker tkr(Tracker::ReserveAndCommit, thread);
370 tkr.record(addr, size, flags, pc);
371 }
372
373
374 // record memory type on virtual memory base address
375 static inline void record_virtual_memory_type(address base, MEMFLAGS flags,
376 Thread* thread = NULL) {
377 Tracker tkr(Tracker::Type);
378 tkr.record(base, 0, flags);
379 }
380
381 // Get memory trackers for memory operations that can result race conditions.
382 // The memory tracker has to be obtained before realloc, virtual memory uncommit
383 // and virtual memory release, and call tracker.record() method if operation
384 // succeeded, or tracker.discard() to abort the tracking.
385 static inline Tracker get_realloc_tracker() {
386 return Tracker(Tracker::Realloc);
387 }
388
389 static inline Tracker get_virtual_memory_uncommit_tracker() {
390 return Tracker(Tracker::Uncommit);
391 }
392
393 static inline Tracker get_virtual_memory_release_tracker() {
394 return Tracker(Tracker::Release);
395 }
396
397
398 // create memory baseline of current memory snapshot
399 static bool baseline();
400 // is there a memory baseline
401 static bool has_baseline() {
402 return _baseline.baselined();
403 }
404
405 // print memory usage from current snapshot
406 static bool print_memory_usage(BaselineOutputer& out, size_t unit,
407 bool summary_only = true);
408 // compare memory usage between current snapshot and baseline
409 static bool compare_memory_usage(BaselineOutputer& out, size_t unit,
410 bool summary_only = true);
411
412 // the version for whitebox testing support, it ensures that all memory
413 // activities before this method call, are reflected in the snapshot
414 // database.
440 static void final_shutdown();
441
442 protected:
443 // retrieve per-thread recorder of the specified thread.
444 // if the recorder is full, it will be enqueued to overflow
445 // queue, a new recorder is acquired from recorder pool or a
446 // new instance is created.
447 // when thread == NULL, it means global recorder
448 static MemRecorder* get_thread_recorder(JavaThread* thread);
449
450 // per-thread recorder pool
451 static void release_thread_recorder(MemRecorder* rec);
452 static void delete_all_pooled_recorders();
453
454 // pending recorder queue. Recorders are queued to pending queue
455 // when they are overflowed or collected at nmt sync point.
456 static void enqueue_pending_recorder(MemRecorder* rec);
457 static MemRecorder* get_pending_recorders();
458 static void delete_all_pending_recorders();
459
460 // write a memory tracking record in recorder
461 static void write_tracking_record(address addr, MEMFLAGS type,
462 size_t size, jint seq, address pc, JavaThread* thread);
463
464 static bool is_single_threaded_bootstrap() {
465 return _state == NMT_bootstrapping_single_thread;
466 }
467
468 static void check_NMT_load(Thread* thr) {
469 assert(thr != NULL, "Sanity check");
470 if (_slowdown_calling_thread && thr != _worker_thread) {
471 os::yield_all();
472 }
473 }
474
475 static void inc_pending_op_count() {
476 Atomic::inc(&_pending_op_count);
477 }
478
479 static void dec_pending_op_count() {
480 Atomic::dec(&_pending_op_count);
481 assert(_pending_op_count >= 0, "Sanity check");
482 }
483
484
485 private:
486 // retrieve a pooled memory record or create new one if there is not
487 // one available
488 static MemRecorder* get_new_or_pooled_instance();
489 static void create_memory_record(address addr, MEMFLAGS type,
490 size_t size, address pc, Thread* thread);
491 static void create_record_in_recorder(address addr, MEMFLAGS type,
492 size_t size, address pc, JavaThread* thread);
493
494 static void set_current_processing_generation(unsigned long generation) {
495 _worker_thread_idle = false;
496 _processing_generation = generation;
497 }
498
499 static void report_worker_idle() {
500 _worker_thread_idle = true;
501 }
502
503 private:
504 // global memory snapshot
543 static int _sync_point_skip_count;
544
545 // if the tracker is properly intialized
546 static bool _is_tracker_ready;
547 // tracking level (off, summary and detail)
548 static enum NMTLevel _tracking_level;
549
550 // current nmt state
551 static volatile enum NMTStates _state;
552 // the reason for shutting down nmt
553 static enum ShutdownReason _reason;
554 // the generation that NMT is processing
555 static volatile unsigned long _processing_generation;
556 // although NMT is still procesing current generation, but
557 // there is not more recorder to process, set idle state
558 static volatile bool _worker_thread_idle;
559
560 // if NMT should slow down calling thread to allow
561 // worker thread to catch up
562 static volatile bool _slowdown_calling_thread;
563
564 // pending memory op count.
565 // Certain memory ops need to pre-reserve sequence number
566 // before memory operation can happen to avoid race condition.
567 // See MemTracker::Tracker for detail
568 static volatile jint _pending_op_count;
569 };
570
571 #endif // !INCLUDE_NMT
572
573 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP
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