Mercurial > hg > truffle
annotate src/share/vm/services/memTracker.hpp @ 6741:33143ee07800
7181995: NMT ON: NMT assertion failure assert(cur_vm->is_uncommit_record() || cur_vm->is_deallocation_record
Summary: Fixed virtual memory records merge and promotion logic, should be based on sequence number vs. base address order
Reviewed-by: coleenp, acorn
| author | zgu |
|---|---|
| date | Tue, 11 Sep 2012 20:53:17 -0400 |
| parents | 4acebbe310e1 |
| children | 716e6ef4482a |
| rev | line source |
|---|---|
| 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 | |
| 88 | |
| 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 public: | |
| 97 enum ShutdownReason { | |
| 98 NMT_shutdown_none, // no shutdown requested | |
| 99 NMT_shutdown_user, // user requested shutdown | |
| 100 NMT_normal, // normal shutdown, process exit | |
| 101 NMT_out_of_memory, // shutdown due to out of memory | |
| 102 NMT_initialization, // shutdown due to initialization failure | |
| 103 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag | |
| 104 NMT_error_reporting, // shutdown by vmError::report_and_die() | |
| 105 NMT_out_of_generation, // running out of generation queue | |
| 106 NMT_sequence_overflow // overflow the sequence number | |
| 107 }; | |
| 108 | |
| 109 public: | |
| 110 // initialize NMT tracking level from command line options, called | |
| 111 // from VM command line parsing code | |
| 112 static void init_tracking_options(const char* option_line); | |
| 113 | |
| 114 // if NMT is enabled to record memory activities | |
| 115 static inline bool is_on() { | |
| 116 return (_tracking_level >= NMT_summary && | |
| 117 _state >= NMT_bootstrapping_single_thread); | |
| 118 } | |
| 119 | |
| 120 // user readable reason for shutting down NMT | |
| 121 static const char* reason() { | |
| 122 switch(_reason) { | |
| 123 case NMT_shutdown_none: | |
| 124 return "Native memory tracking is not enabled"; | |
| 125 case NMT_shutdown_user: | |
| 126 return "Native memory tracking has been shutdown by user"; | |
| 127 case NMT_normal: | |
| 128 return "Native memory tracking has been shutdown due to process exiting"; | |
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129 case NMT_out_of_memory: |
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130 return "Native memory tracking has been shutdown due to out of native memory"; |
| 6197 | 131 case NMT_initialization: |
| 132 return "Native memory tracking failed to initialize"; | |
| 133 case NMT_error_reporting: | |
| 134 return "Native memory tracking has been shutdown due to error reporting"; | |
| 135 case NMT_out_of_generation: | |
| 136 return "Native memory tracking has been shutdown due to running out of generation buffer"; | |
| 137 case NMT_sequence_overflow: | |
| 138 return "Native memory tracking has been shutdown due to overflow the sequence number"; | |
| 139 case NMT_use_malloc_only: | |
| 140 return "Native memory tracking is not supported when UseMallocOnly is on"; | |
| 141 default: | |
| 142 ShouldNotReachHere(); | |
| 143 return NULL; | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 // test if we can walk native stack | |
| 148 static bool can_walk_stack() { | |
| 149 // native stack is not walkable during bootstrapping on sparc | |
| 150 #if defined(SPARC) | |
| 151 return (_state == NMT_started); | |
| 152 #else | |
| 153 return (_state >= NMT_bootstrapping_single_thread && _state <= NMT_started); | |
| 154 #endif | |
| 155 } | |
| 156 | |
| 157 // if native memory tracking tracks callsite | |
| 158 static inline bool track_callsite() { return _tracking_level == NMT_detail; } | |
| 159 | |
| 160 // shutdown native memory tracking capability. Native memory tracking | |
| 161 // can be shutdown by VM when it encounters low memory scenarios. | |
| 162 // Memory tracker should gracefully shutdown itself, and preserve the | |
| 163 // latest memory statistics for post morten diagnosis. | |
| 164 static void shutdown(ShutdownReason reason); | |
| 165 | |
| 166 // if there is shutdown requested | |
| 167 static inline bool shutdown_in_progress() { | |
| 168 return (_state >= NMT_shutdown_pending); | |
| 169 } | |
| 170 | |
| 171 // bootstrap native memory tracking, so it can start to collect raw data | |
| 172 // before worker thread can start | |
| 173 | |
| 174 // the first phase of bootstrapping, when VM still in single-threaded mode | |
| 175 static void bootstrap_single_thread(); | |
| 176 // the second phase of bootstrapping, VM is about or already in multi-threaded mode | |
| 177 static void bootstrap_multi_thread(); | |
| 178 | |
| 179 | |
| 180 // start() has to be called when VM still in single thread mode, but after | |
| 181 // command line option parsing is done. | |
| 182 static void start(); | |
| 183 | |
| 184 // record a 'malloc' call | |
| 185 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags, | |
| 186 address pc = 0, Thread* thread = NULL) { | |
| 187 if (NMT_CAN_TRACK(flags)) { | |
| 188 create_memory_record(addr, (flags|MemPointerRecord::malloc_tag()), size, pc, thread); | |
| 189 } | |
| 190 } | |
| 191 // record a 'free' call | |
| 192 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { | |
| 193 if (is_on() && NMT_CAN_TRACK(flags)) { | |
| 194 create_memory_record(addr, MemPointerRecord::free_tag(), 0, 0, thread); | |
| 195 } | |
| 196 } | |
| 197 // record a 'realloc' call | |
| 198 static inline void record_realloc(address old_addr, address new_addr, size_t size, | |
| 199 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { | |
| 200 if (is_on()) { | |
| 201 record_free(old_addr, flags, thread); | |
| 202 record_malloc(new_addr, size, flags, pc, thread); | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 // record arena size | |
| 207 static inline void record_arena_size(address addr, size_t size) { | |
| 208 // we add a positive offset to arena address, so we can have arena size record | |
| 209 // sorted after arena record | |
| 210 if (is_on() && !UseMallocOnly) { | |
| 211 create_memory_record((addr + sizeof(void*)), MemPointerRecord::arena_size_tag(), size, | |
| 212 0, NULL); | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 // record a virtual memory 'reserve' call | |
| 217 static inline void record_virtual_memory_reserve(address addr, size_t size, | |
| 218 address pc = 0, Thread* thread = NULL) { | |
| 219 if (is_on()) { | |
| 220 assert(size > 0, "reserve szero size"); | |
| 221 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag(), | |
| 222 size, pc, thread); | |
| 223 } | |
| 224 } | |
| 225 | |
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226 static inline void record_thread_stack(address addr, size_t size, Thread* thr, |
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227 address pc = 0) { |
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228 if (is_on()) { |
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229 assert(size > 0 && thr != NULL, "Sanity check"); |
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230 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag() | mtThreadStack, |
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231 size, pc, thr); |
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232 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag() | mtThreadStack, |
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233 size, pc, thr); |
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234 } |
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235 } |
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236 |
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237 static inline void release_thread_stack(address addr, size_t size, Thread* thr) { |
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238 if (is_on()) { |
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239 assert(size > 0 && thr != NULL, "Sanity check"); |
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240 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag() | mtThreadStack, |
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241 size, DEBUG_CALLER_PC, thr); |
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242 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag() | mtThreadStack, |
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243 size, DEBUG_CALLER_PC, thr); |
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244 } |
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245 } |
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246 |
| 6197 | 247 // record a virtual memory 'commit' call |
| 248 static inline void record_virtual_memory_commit(address addr, size_t size, | |
| 249 address pc = 0, Thread* thread = NULL) { | |
| 250 if (is_on()) { | |
| 251 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag(), | |
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252 size, DEBUG_CALLER_PC, thread); |
| 6197 | 253 } |
| 254 } | |
| 255 | |
| 256 // record a virtual memory 'uncommit' call | |
| 257 static inline void record_virtual_memory_uncommit(address addr, size_t size, | |
| 258 Thread* thread = NULL) { | |
| 259 if (is_on()) { | |
| 260 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag(), | |
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261 size, DEBUG_CALLER_PC, thread); |
| 6197 | 262 } |
| 263 } | |
| 264 | |
| 265 // record a virtual memory 'release' call | |
| 266 static inline void record_virtual_memory_release(address addr, size_t size, | |
| 267 Thread* thread = NULL) { | |
| 268 if (is_on()) { | |
| 269 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag(), | |
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270 size, DEBUG_CALLER_PC, thread); |
| 6197 | 271 } |
| 272 } | |
| 273 | |
| 274 // record memory type on virtual memory base address | |
| 275 static inline void record_virtual_memory_type(address base, MEMFLAGS flags, | |
| 276 Thread* thread = NULL) { | |
| 277 if (is_on()) { | |
| 278 assert(base > 0, "wrong base address"); | |
| 279 assert((flags & (~mt_masks)) == 0, "memory type only"); | |
| 280 create_memory_record(base, (flags | MemPointerRecord::virtual_memory_type_tag()), | |
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281 0, DEBUG_CALLER_PC, thread); |
| 6197 | 282 } |
| 283 } | |
| 284 | |
| 285 | |
| 286 // create memory baseline of current memory snapshot | |
| 287 static bool baseline(); | |
| 288 // is there a memory baseline | |
| 289 static bool has_baseline() { | |
| 290 return _baseline.baselined(); | |
| 291 } | |
| 292 | |
| 293 // print memory usage from current snapshot | |
| 294 static bool print_memory_usage(BaselineOutputer& out, size_t unit, | |
| 295 bool summary_only = true); | |
| 296 // compare memory usage between current snapshot and baseline | |
| 297 static bool compare_memory_usage(BaselineOutputer& out, size_t unit, | |
| 298 bool summary_only = true); | |
| 299 | |
| 300 // sync is called within global safepoint to synchronize nmt data | |
| 301 static void sync(); | |
| 302 | |
| 303 // called when a thread is about to exit | |
| 304 static void thread_exiting(JavaThread* thread); | |
| 305 | |
| 306 // retrieve global snapshot | |
| 307 static MemSnapshot* get_snapshot() { | |
| 308 if (shutdown_in_progress()) { | |
| 309 return NULL; | |
| 310 } | |
| 311 return _snapshot; | |
| 312 } | |
| 313 | |
| 314 // print tracker stats | |
| 315 NOT_PRODUCT(static void print_tracker_stats(outputStream* st);) | |
| 316 NOT_PRODUCT(static void walk_stack(int toSkip, char* buf, int len);) | |
| 317 | |
| 318 private: | |
| 319 // start native memory tracking worker thread | |
| 320 static bool start_worker(); | |
| 321 | |
| 322 // called by worker thread to complete shutdown process | |
| 323 static void final_shutdown(); | |
| 324 | |
| 325 protected: | |
| 326 // retrieve per-thread recorder of the specified thread. | |
| 327 // if the recorder is full, it will be enqueued to overflow | |
| 328 // queue, a new recorder is acquired from recorder pool or a | |
| 329 // new instance is created. | |
| 330 // when thread == NULL, it means global recorder | |
| 331 static MemRecorder* get_thread_recorder(JavaThread* thread); | |
| 332 | |
| 333 // per-thread recorder pool | |
| 334 static void release_thread_recorder(MemRecorder* rec); | |
| 335 static void delete_all_pooled_recorders(); | |
| 336 | |
| 337 // pending recorder queue. Recorders are queued to pending queue | |
| 338 // when they are overflowed or collected at nmt sync point. | |
| 339 static void enqueue_pending_recorder(MemRecorder* rec); | |
| 340 static MemRecorder* get_pending_recorders(); | |
| 341 static void delete_all_pending_recorders(); | |
| 342 | |
| 343 private: | |
| 344 // retrieve a pooled memory record or create new one if there is not | |
| 345 // one available | |
| 346 static MemRecorder* get_new_or_pooled_instance(); | |
| 347 static void create_memory_record(address addr, MEMFLAGS type, | |
| 348 size_t size, address pc, Thread* thread); | |
| 349 static void create_record_in_recorder(address addr, MEMFLAGS type, | |
| 6231 | 350 size_t size, address pc, JavaThread* thread); |
| 6197 | 351 |
| 352 private: | |
| 353 // global memory snapshot | |
| 354 static MemSnapshot* _snapshot; | |
| 355 | |
| 356 // a memory baseline of snapshot | |
| 357 static MemBaseline _baseline; | |
| 358 | |
| 359 // query lock | |
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360 static Mutex* _query_lock; |
| 6197 | 361 |
| 362 // a thread can start to allocate memory before it is attached | |
| 363 // to VM 'Thread', those memory activities are recorded here. | |
| 364 // ThreadCritical is required to guard this global recorder. | |
| 365 static MemRecorder* _global_recorder; | |
| 366 | |
| 367 // main thread id | |
| 368 debug_only(static intx _main_thread_tid;) | |
| 369 | |
| 370 // pending recorders to be merged | |
| 371 static volatile MemRecorder* _merge_pending_queue; | |
| 372 | |
| 373 NOT_PRODUCT(static volatile jint _pending_recorder_count;) | |
| 374 | |
| 375 // pooled memory recorders | |
| 376 static volatile MemRecorder* _pooled_recorders; | |
| 377 | |
| 378 // memory recorder pool management, uses following | |
| 379 // counter to determine if a released memory recorder | |
| 380 // should be pooled | |
| 381 | |
| 382 // latest thread count | |
| 383 static int _thread_count; | |
| 384 // pooled recorder count | |
| 385 static volatile jint _pooled_recorder_count; | |
| 386 | |
| 387 | |
| 388 // worker thread to merge pending recorders into snapshot | |
| 389 static MemTrackWorker* _worker_thread; | |
| 390 | |
| 391 // how many safepoints we skipped without entering sync point | |
| 392 static int _sync_point_skip_count; | |
| 393 | |
| 394 // if the tracker is properly intialized | |
| 395 static bool _is_tracker_ready; | |
| 396 // tracking level (off, summary and detail) | |
| 397 static enum NMTLevel _tracking_level; | |
| 398 | |
| 399 // current nmt state | |
| 400 static volatile enum NMTStates _state; | |
| 401 // the reason for shutting down nmt | |
| 402 static enum ShutdownReason _reason; | |
| 403 }; | |
| 404 | |
| 405 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP |