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annotate src/share/vm/services/memTracker.hpp @ 6815:86af3dacab81
8000227: [obj|type]ArrayKlass::oop_print_on prints one line to tty instead of the provided output stream
Reviewed-by: brutisso, sla, jmasa, coleenp
author | stefank |
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date | Mon, 01 Oct 2012 13:29:11 +0200 |
parents | 9a86ddfc6c8f |
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6197 | 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 * | |
23 */ | |
24 | |
25 #ifndef SHARE_VM_SERVICES_MEM_TRACKER_HPP | |
26 #define SHARE_VM_SERVICES_MEM_TRACKER_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "runtime/globals.hpp" | |
30 #include "runtime/mutex.hpp" | |
31 #include "runtime/os.hpp" | |
32 #include "runtime/thread.hpp" | |
33 #include "services/memPtr.hpp" | |
34 #include "services/memRecorder.hpp" | |
35 #include "services/memSnapshot.hpp" | |
36 #include "services/memTrackWorker.hpp" | |
37 | |
38 #ifdef SOLARIS | |
39 #include "thread_solaris.inline.hpp" | |
40 #endif | |
41 | |
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42 #ifdef _DEBUG |
6197 | 43 #define DEBUG_CALLER_PC os::get_caller_pc(3) |
44 #else | |
45 #define DEBUG_CALLER_PC 0 | |
46 #endif | |
47 | |
48 // The thread closure walks threads to collect per-thread | |
49 // memory recorders at NMT sync point | |
50 class SyncThreadRecorderClosure : public ThreadClosure { | |
51 private: | |
52 int _thread_count; | |
53 | |
54 public: | |
55 SyncThreadRecorderClosure() { | |
56 _thread_count =0; | |
57 } | |
58 | |
59 void do_thread(Thread* thread); | |
60 int get_thread_count() const { | |
61 return _thread_count; | |
62 } | |
63 }; | |
64 | |
65 class BaselineOutputer; | |
66 class MemSnapshot; | |
67 class MemTrackWorker; | |
68 class Thread; | |
69 /* | |
70 * MemTracker is the 'gate' class to native memory tracking runtime. | |
71 */ | |
72 class MemTracker : AllStatic { | |
73 friend class MemTrackWorker; | |
74 friend class MemSnapshot; | |
75 friend class SyncThreadRecorderClosure; | |
76 | |
77 // NMT state | |
78 enum NMTStates { | |
79 NMT_uninited, // not yet initialized | |
80 NMT_bootstrapping_single_thread, // bootstrapping, VM is in single thread mode | |
81 NMT_bootstrapping_multi_thread, // bootstrapping, VM is about to enter multi-thread mode | |
82 NMT_started, // NMT fully started | |
83 NMT_shutdown_pending, // shutdown pending | |
84 NMT_final_shutdown, // in final phase of shutdown | |
85 NMT_shutdown // shutdown | |
86 }; | |
87 | |
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88 public: |
6197 | 89 // native memory tracking level |
90 enum NMTLevel { | |
91 NMT_off, // native memory tracking is off | |
92 NMT_summary, // don't track callsite | |
93 NMT_detail // track callsite also | |
94 }; | |
95 | |
96 enum ShutdownReason { | |
97 NMT_shutdown_none, // no shutdown requested | |
98 NMT_shutdown_user, // user requested shutdown | |
99 NMT_normal, // normal shutdown, process exit | |
100 NMT_out_of_memory, // shutdown due to out of memory | |
101 NMT_initialization, // shutdown due to initialization failure | |
102 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag | |
103 NMT_error_reporting, // shutdown by vmError::report_and_die() | |
104 NMT_out_of_generation, // running out of generation queue | |
105 NMT_sequence_overflow // overflow the sequence number | |
106 }; | |
107 | |
108 public: | |
109 // initialize NMT tracking level from command line options, called | |
110 // from VM command line parsing code | |
111 static void init_tracking_options(const char* option_line); | |
112 | |
113 // if NMT is enabled to record memory activities | |
114 static inline bool is_on() { | |
115 return (_tracking_level >= NMT_summary && | |
116 _state >= NMT_bootstrapping_single_thread); | |
117 } | |
118 | |
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119 static inline enum NMTLevel tracking_level() { |
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120 return _tracking_level; |
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121 } |
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122 |
6197 | 123 // user readable reason for shutting down NMT |
124 static const char* reason() { | |
125 switch(_reason) { | |
126 case NMT_shutdown_none: | |
127 return "Native memory tracking is not enabled"; | |
128 case NMT_shutdown_user: | |
129 return "Native memory tracking has been shutdown by user"; | |
130 case NMT_normal: | |
131 return "Native memory tracking has been shutdown due to process exiting"; | |
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132 case NMT_out_of_memory: |
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133 return "Native memory tracking has been shutdown due to out of native memory"; |
6197 | 134 case NMT_initialization: |
135 return "Native memory tracking failed to initialize"; | |
136 case NMT_error_reporting: | |
137 return "Native memory tracking has been shutdown due to error reporting"; | |
138 case NMT_out_of_generation: | |
139 return "Native memory tracking has been shutdown due to running out of generation buffer"; | |
140 case NMT_sequence_overflow: | |
141 return "Native memory tracking has been shutdown due to overflow the sequence number"; | |
142 case NMT_use_malloc_only: | |
143 return "Native memory tracking is not supported when UseMallocOnly is on"; | |
144 default: | |
145 ShouldNotReachHere(); | |
146 return NULL; | |
147 } | |
148 } | |
149 | |
150 // test if we can walk native stack | |
151 static bool can_walk_stack() { | |
152 // native stack is not walkable during bootstrapping on sparc | |
153 #if defined(SPARC) | |
154 return (_state == NMT_started); | |
155 #else | |
156 return (_state >= NMT_bootstrapping_single_thread && _state <= NMT_started); | |
157 #endif | |
158 } | |
159 | |
160 // if native memory tracking tracks callsite | |
161 static inline bool track_callsite() { return _tracking_level == NMT_detail; } | |
162 | |
163 // shutdown native memory tracking capability. Native memory tracking | |
164 // can be shutdown by VM when it encounters low memory scenarios. | |
165 // Memory tracker should gracefully shutdown itself, and preserve the | |
166 // latest memory statistics for post morten diagnosis. | |
167 static void shutdown(ShutdownReason reason); | |
168 | |
169 // if there is shutdown requested | |
170 static inline bool shutdown_in_progress() { | |
171 return (_state >= NMT_shutdown_pending); | |
172 } | |
173 | |
174 // bootstrap native memory tracking, so it can start to collect raw data | |
175 // before worker thread can start | |
176 | |
177 // the first phase of bootstrapping, when VM still in single-threaded mode | |
178 static void bootstrap_single_thread(); | |
179 // the second phase of bootstrapping, VM is about or already in multi-threaded mode | |
180 static void bootstrap_multi_thread(); | |
181 | |
182 | |
183 // start() has to be called when VM still in single thread mode, but after | |
184 // command line option parsing is done. | |
185 static void start(); | |
186 | |
187 // record a 'malloc' call | |
188 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags, | |
189 address pc = 0, Thread* thread = NULL) { | |
190 if (NMT_CAN_TRACK(flags)) { | |
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191 assert(size > 0, "Sanity check"); |
6197 | 192 create_memory_record(addr, (flags|MemPointerRecord::malloc_tag()), size, pc, thread); |
193 } | |
194 } | |
195 // record a 'free' call | |
196 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { | |
197 if (is_on() && NMT_CAN_TRACK(flags)) { | |
198 create_memory_record(addr, MemPointerRecord::free_tag(), 0, 0, thread); | |
199 } | |
200 } | |
201 // record a 'realloc' call | |
202 static inline void record_realloc(address old_addr, address new_addr, size_t size, | |
203 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { | |
204 if (is_on()) { | |
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205 assert(size > 0, "Sanity check"); |
6197 | 206 record_free(old_addr, flags, thread); |
207 record_malloc(new_addr, size, flags, pc, thread); | |
208 } | |
209 } | |
210 | |
211 // record arena size | |
212 static inline void record_arena_size(address addr, size_t size) { | |
213 // we add a positive offset to arena address, so we can have arena size record | |
214 // sorted after arena record | |
215 if (is_on() && !UseMallocOnly) { | |
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216 assert(addr != NULL, "Sanity check"); |
6197 | 217 create_memory_record((addr + sizeof(void*)), MemPointerRecord::arena_size_tag(), size, |
218 0, NULL); | |
219 } | |
220 } | |
221 | |
222 // record a virtual memory 'reserve' call | |
223 static inline void record_virtual_memory_reserve(address addr, size_t size, | |
224 address pc = 0, Thread* thread = NULL) { | |
225 if (is_on()) { | |
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226 assert(size > 0, "Sanity check"); |
6197 | 227 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag(), |
228 size, pc, thread); | |
229 } | |
230 } | |
231 | |
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232 static inline void record_thread_stack(address addr, size_t size, Thread* thr, |
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233 address pc = 0) { |
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234 if (is_on()) { |
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235 assert(size > 0 && thr != NULL, "Sanity check"); |
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236 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag() | mtThreadStack, |
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237 size, pc, thr); |
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238 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag() | mtThreadStack, |
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239 size, pc, thr); |
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240 } |
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241 } |
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242 |
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243 static inline void release_thread_stack(address addr, size_t size, Thread* thr) { |
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244 if (is_on()) { |
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245 assert(size > 0 && thr != NULL, "Sanity check"); |
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246 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag() | mtThreadStack, |
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247 size, DEBUG_CALLER_PC, thr); |
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248 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag() | mtThreadStack, |
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249 size, DEBUG_CALLER_PC, thr); |
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250 } |
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251 } |
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252 |
6197 | 253 // record a virtual memory 'commit' call |
254 static inline void record_virtual_memory_commit(address addr, size_t size, | |
255 address pc = 0, Thread* thread = NULL) { | |
256 if (is_on()) { | |
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257 assert(size > 0, "Sanity check"); |
6197 | 258 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag(), |
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259 size, DEBUG_CALLER_PC, thread); |
6197 | 260 } |
261 } | |
262 | |
263 // record a virtual memory 'uncommit' call | |
264 static inline void record_virtual_memory_uncommit(address addr, size_t size, | |
265 Thread* thread = NULL) { | |
266 if (is_on()) { | |
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267 assert(size > 0, "Sanity check"); |
6197 | 268 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag(), |
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269 size, DEBUG_CALLER_PC, thread); |
6197 | 270 } |
271 } | |
272 | |
273 // record a virtual memory 'release' call | |
274 static inline void record_virtual_memory_release(address addr, size_t size, | |
275 Thread* thread = NULL) { | |
276 if (is_on()) { | |
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277 assert(size > 0, "Sanity check"); |
6197 | 278 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag(), |
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279 size, DEBUG_CALLER_PC, thread); |
6197 | 280 } |
281 } | |
282 | |
283 // record memory type on virtual memory base address | |
284 static inline void record_virtual_memory_type(address base, MEMFLAGS flags, | |
285 Thread* thread = NULL) { | |
286 if (is_on()) { | |
287 assert(base > 0, "wrong base address"); | |
288 assert((flags & (~mt_masks)) == 0, "memory type only"); | |
289 create_memory_record(base, (flags | MemPointerRecord::virtual_memory_type_tag()), | |
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290 0, DEBUG_CALLER_PC, thread); |
6197 | 291 } |
292 } | |
293 | |
294 | |
295 // create memory baseline of current memory snapshot | |
296 static bool baseline(); | |
297 // is there a memory baseline | |
298 static bool has_baseline() { | |
299 return _baseline.baselined(); | |
300 } | |
301 | |
302 // print memory usage from current snapshot | |
303 static bool print_memory_usage(BaselineOutputer& out, size_t unit, | |
304 bool summary_only = true); | |
305 // compare memory usage between current snapshot and baseline | |
306 static bool compare_memory_usage(BaselineOutputer& out, size_t unit, | |
307 bool summary_only = true); | |
308 | |
309 // sync is called within global safepoint to synchronize nmt data | |
310 static void sync(); | |
311 | |
312 // called when a thread is about to exit | |
313 static void thread_exiting(JavaThread* thread); | |
314 | |
315 // retrieve global snapshot | |
316 static MemSnapshot* get_snapshot() { | |
317 if (shutdown_in_progress()) { | |
318 return NULL; | |
319 } | |
320 return _snapshot; | |
321 } | |
322 | |
323 // print tracker stats | |
324 NOT_PRODUCT(static void print_tracker_stats(outputStream* st);) | |
325 NOT_PRODUCT(static void walk_stack(int toSkip, char* buf, int len);) | |
326 | |
327 private: | |
328 // start native memory tracking worker thread | |
329 static bool start_worker(); | |
330 | |
331 // called by worker thread to complete shutdown process | |
332 static void final_shutdown(); | |
333 | |
334 protected: | |
335 // retrieve per-thread recorder of the specified thread. | |
336 // if the recorder is full, it will be enqueued to overflow | |
337 // queue, a new recorder is acquired from recorder pool or a | |
338 // new instance is created. | |
339 // when thread == NULL, it means global recorder | |
340 static MemRecorder* get_thread_recorder(JavaThread* thread); | |
341 | |
342 // per-thread recorder pool | |
343 static void release_thread_recorder(MemRecorder* rec); | |
344 static void delete_all_pooled_recorders(); | |
345 | |
346 // pending recorder queue. Recorders are queued to pending queue | |
347 // when they are overflowed or collected at nmt sync point. | |
348 static void enqueue_pending_recorder(MemRecorder* rec); | |
349 static MemRecorder* get_pending_recorders(); | |
350 static void delete_all_pending_recorders(); | |
351 | |
352 private: | |
353 // retrieve a pooled memory record or create new one if there is not | |
354 // one available | |
355 static MemRecorder* get_new_or_pooled_instance(); | |
356 static void create_memory_record(address addr, MEMFLAGS type, | |
357 size_t size, address pc, Thread* thread); | |
358 static void create_record_in_recorder(address addr, MEMFLAGS type, | |
6231 | 359 size_t size, address pc, JavaThread* thread); |
6197 | 360 |
361 private: | |
362 // global memory snapshot | |
363 static MemSnapshot* _snapshot; | |
364 | |
365 // a memory baseline of snapshot | |
366 static MemBaseline _baseline; | |
367 | |
368 // query lock | |
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369 static Mutex* _query_lock; |
6197 | 370 |
371 // a thread can start to allocate memory before it is attached | |
372 // to VM 'Thread', those memory activities are recorded here. | |
373 // ThreadCritical is required to guard this global recorder. | |
374 static MemRecorder* _global_recorder; | |
375 | |
376 // main thread id | |
377 debug_only(static intx _main_thread_tid;) | |
378 | |
379 // pending recorders to be merged | |
380 static volatile MemRecorder* _merge_pending_queue; | |
381 | |
382 NOT_PRODUCT(static volatile jint _pending_recorder_count;) | |
383 | |
384 // pooled memory recorders | |
385 static volatile MemRecorder* _pooled_recorders; | |
386 | |
387 // memory recorder pool management, uses following | |
388 // counter to determine if a released memory recorder | |
389 // should be pooled | |
390 | |
391 // latest thread count | |
392 static int _thread_count; | |
393 // pooled recorder count | |
394 static volatile jint _pooled_recorder_count; | |
395 | |
396 | |
397 // worker thread to merge pending recorders into snapshot | |
398 static MemTrackWorker* _worker_thread; | |
399 | |
400 // how many safepoints we skipped without entering sync point | |
401 static int _sync_point_skip_count; | |
402 | |
403 // if the tracker is properly intialized | |
404 static bool _is_tracker_ready; | |
405 // tracking level (off, summary and detail) | |
406 static enum NMTLevel _tracking_level; | |
407 | |
408 // current nmt state | |
409 static volatile enum NMTStates _state; | |
410 // the reason for shutting down nmt | |
411 static enum ShutdownReason _reason; | |
412 }; | |
413 | |
414 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP |