Mercurial > hg > truffle
annotate src/share/vm/services/memTracker.hpp @ 6882:716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
Summary: Enhanced virtual memory tracking to track committed regions as well as reserved regions, so NMT now can generate virtual memory map.
Reviewed-by: acorn, coleenp
| author | zgu |
|---|---|
| date | Fri, 19 Oct 2012 21:40:07 -0400 |
| parents | fb19af007ffc |
| children | fb3190e77d3c |
| 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 | |
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28 #include "utilities/macros.hpp" |
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29 |
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30 #if !INCLUDE_NMT |
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31 |
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32 #include "utilities/ostream.hpp" |
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33 |
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34 class BaselineOutputer : public StackObj { |
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35 |
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36 }; |
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37 |
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38 class BaselineTTYOutputer : public BaselineOutputer { |
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39 public: |
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40 BaselineTTYOutputer(outputStream* st) { } |
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41 }; |
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42 |
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43 class MemTracker : AllStatic { |
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44 public: |
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45 enum ShutdownReason { |
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46 NMT_shutdown_none, // no shutdown requested |
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47 NMT_shutdown_user, // user requested shutdown |
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48 NMT_normal, // normal shutdown, process exit |
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49 NMT_out_of_memory, // shutdown due to out of memory |
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50 NMT_initialization, // shutdown due to initialization failure |
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51 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag |
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52 NMT_error_reporting, // shutdown by vmError::report_and_die() |
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53 NMT_out_of_generation, // running out of generation queue |
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54 NMT_sequence_overflow // overflow the sequence number |
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55 }; |
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56 |
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57 |
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58 public: |
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59 static inline void init_tracking_options(const char* option_line) { } |
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60 static inline bool is_on() { return false; } |
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61 static const char* reason() { return "Native memory tracking is not implemented"; } |
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62 static inline bool can_walk_stack() { return false; } |
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63 |
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64 static inline void bootstrap_single_thread() { } |
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65 static inline void bootstrap_multi_thread() { } |
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66 static inline void start() { } |
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67 |
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68 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags, |
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69 address pc = 0, Thread* thread = NULL) { } |
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70 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { } |
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71 static inline void record_realloc(address old_addr, address new_addr, size_t size, |
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72 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { } |
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73 static inline void record_arena_size(address addr, size_t size) { } |
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74 static inline void record_virtual_memory_reserve(address addr, size_t size, |
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75 address pc = 0, Thread* thread = NULL) { } |
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76 static inline void record_virtual_memory_commit(address addr, size_t size, |
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77 address pc = 0, Thread* thread = NULL) { } |
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78 static inline void record_virtual_memory_uncommit(address addr, size_t size, |
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79 Thread* thread = NULL) { } |
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80 static inline void record_virtual_memory_release(address addr, size_t size, |
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81 Thread* thread = NULL) { } |
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82 static inline void record_virtual_memory_type(address base, MEMFLAGS flags, |
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83 Thread* thread = NULL) { } |
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84 static inline bool baseline() { return false; } |
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85 static inline bool has_baseline() { return false; } |
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86 |
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87 static void shutdown(ShutdownReason reason) { } |
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88 static inline bool shutdown_in_progress() { } |
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89 static bool print_memory_usage(BaselineOutputer& out, size_t unit, |
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90 bool summary_only = true) { } |
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91 static bool compare_memory_usage(BaselineOutputer& out, size_t unit, |
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92 bool summary_only = true) { } |
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93 |
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94 static inline void sync() { } |
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95 static inline void thread_exiting(JavaThread* thread) { } |
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96 |
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97 }; |
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98 |
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99 |
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100 #else // !INCLUDE_NMT |
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101 |
| 6197 | 102 #include "memory/allocation.hpp" |
| 103 #include "runtime/globals.hpp" | |
| 104 #include "runtime/mutex.hpp" | |
| 105 #include "runtime/os.hpp" | |
| 106 #include "runtime/thread.hpp" | |
| 107 #include "services/memPtr.hpp" | |
| 108 #include "services/memRecorder.hpp" | |
| 109 #include "services/memSnapshot.hpp" | |
| 110 #include "services/memTrackWorker.hpp" | |
| 111 | |
| 112 #ifdef SOLARIS | |
| 113 #include "thread_solaris.inline.hpp" | |
| 114 #endif | |
| 115 | |
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116 extern bool NMT_track_callsite; |
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117 |
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118 #ifdef ASSERT |
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119 #define DEBUG_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) |
| 6197 | 120 #else |
| 121 #define DEBUG_CALLER_PC 0 | |
| 122 #endif | |
| 123 | |
| 124 // The thread closure walks threads to collect per-thread | |
| 125 // memory recorders at NMT sync point | |
| 126 class SyncThreadRecorderClosure : public ThreadClosure { | |
| 127 private: | |
| 128 int _thread_count; | |
| 129 | |
| 130 public: | |
| 131 SyncThreadRecorderClosure() { | |
| 132 _thread_count =0; | |
| 133 } | |
| 134 | |
| 135 void do_thread(Thread* thread); | |
| 136 int get_thread_count() const { | |
| 137 return _thread_count; | |
| 138 } | |
| 139 }; | |
| 140 | |
| 141 class BaselineOutputer; | |
| 142 class MemSnapshot; | |
| 143 class MemTrackWorker; | |
| 144 class Thread; | |
| 145 /* | |
| 146 * MemTracker is the 'gate' class to native memory tracking runtime. | |
| 147 */ | |
| 148 class MemTracker : AllStatic { | |
| 149 friend class MemTrackWorker; | |
| 150 friend class MemSnapshot; | |
| 151 friend class SyncThreadRecorderClosure; | |
| 152 | |
| 153 // NMT state | |
| 154 enum NMTStates { | |
| 155 NMT_uninited, // not yet initialized | |
| 156 NMT_bootstrapping_single_thread, // bootstrapping, VM is in single thread mode | |
| 157 NMT_bootstrapping_multi_thread, // bootstrapping, VM is about to enter multi-thread mode | |
| 158 NMT_started, // NMT fully started | |
| 159 NMT_shutdown_pending, // shutdown pending | |
| 160 NMT_final_shutdown, // in final phase of shutdown | |
| 161 NMT_shutdown // shutdown | |
| 162 }; | |
| 163 | |
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164 public: |
| 6197 | 165 // native memory tracking level |
| 166 enum NMTLevel { | |
| 167 NMT_off, // native memory tracking is off | |
| 168 NMT_summary, // don't track callsite | |
| 169 NMT_detail // track callsite also | |
| 170 }; | |
| 171 | |
| 172 enum ShutdownReason { | |
| 173 NMT_shutdown_none, // no shutdown requested | |
| 174 NMT_shutdown_user, // user requested shutdown | |
| 175 NMT_normal, // normal shutdown, process exit | |
| 176 NMT_out_of_memory, // shutdown due to out of memory | |
| 177 NMT_initialization, // shutdown due to initialization failure | |
| 178 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag | |
| 179 NMT_error_reporting, // shutdown by vmError::report_and_die() | |
| 180 NMT_out_of_generation, // running out of generation queue | |
| 181 NMT_sequence_overflow // overflow the sequence number | |
| 182 }; | |
| 183 | |
| 184 public: | |
| 185 // initialize NMT tracking level from command line options, called | |
| 186 // from VM command line parsing code | |
| 187 static void init_tracking_options(const char* option_line); | |
| 188 | |
| 189 // if NMT is enabled to record memory activities | |
| 190 static inline bool is_on() { | |
| 191 return (_tracking_level >= NMT_summary && | |
| 192 _state >= NMT_bootstrapping_single_thread); | |
| 193 } | |
| 194 | |
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195 static inline enum NMTLevel tracking_level() { |
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196 return _tracking_level; |
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197 } |
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198 |
| 6197 | 199 // user readable reason for shutting down NMT |
| 200 static const char* reason() { | |
| 201 switch(_reason) { | |
| 202 case NMT_shutdown_none: | |
| 203 return "Native memory tracking is not enabled"; | |
| 204 case NMT_shutdown_user: | |
| 205 return "Native memory tracking has been shutdown by user"; | |
| 206 case NMT_normal: | |
| 207 return "Native memory tracking has been shutdown due to process exiting"; | |
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208 case NMT_out_of_memory: |
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209 return "Native memory tracking has been shutdown due to out of native memory"; |
| 6197 | 210 case NMT_initialization: |
| 211 return "Native memory tracking failed to initialize"; | |
| 212 case NMT_error_reporting: | |
| 213 return "Native memory tracking has been shutdown due to error reporting"; | |
| 214 case NMT_out_of_generation: | |
| 215 return "Native memory tracking has been shutdown due to running out of generation buffer"; | |
| 216 case NMT_sequence_overflow: | |
| 217 return "Native memory tracking has been shutdown due to overflow the sequence number"; | |
| 218 case NMT_use_malloc_only: | |
| 219 return "Native memory tracking is not supported when UseMallocOnly is on"; | |
| 220 default: | |
| 221 ShouldNotReachHere(); | |
| 222 return NULL; | |
| 223 } | |
| 224 } | |
| 225 | |
| 226 // test if we can walk native stack | |
| 227 static bool can_walk_stack() { | |
| 228 // native stack is not walkable during bootstrapping on sparc | |
| 229 #if defined(SPARC) | |
| 230 return (_state == NMT_started); | |
| 231 #else | |
| 232 return (_state >= NMT_bootstrapping_single_thread && _state <= NMT_started); | |
| 233 #endif | |
| 234 } | |
| 235 | |
| 236 // if native memory tracking tracks callsite | |
| 237 static inline bool track_callsite() { return _tracking_level == NMT_detail; } | |
| 238 | |
| 239 // shutdown native memory tracking capability. Native memory tracking | |
| 240 // can be shutdown by VM when it encounters low memory scenarios. | |
| 241 // Memory tracker should gracefully shutdown itself, and preserve the | |
| 242 // latest memory statistics for post morten diagnosis. | |
| 243 static void shutdown(ShutdownReason reason); | |
| 244 | |
| 245 // if there is shutdown requested | |
| 246 static inline bool shutdown_in_progress() { | |
| 247 return (_state >= NMT_shutdown_pending); | |
| 248 } | |
| 249 | |
| 250 // bootstrap native memory tracking, so it can start to collect raw data | |
| 251 // before worker thread can start | |
| 252 | |
| 253 // the first phase of bootstrapping, when VM still in single-threaded mode | |
| 254 static void bootstrap_single_thread(); | |
| 255 // the second phase of bootstrapping, VM is about or already in multi-threaded mode | |
| 256 static void bootstrap_multi_thread(); | |
| 257 | |
| 258 | |
| 259 // start() has to be called when VM still in single thread mode, but after | |
| 260 // command line option parsing is done. | |
| 261 static void start(); | |
| 262 | |
| 263 // record a 'malloc' call | |
| 264 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags, | |
| 265 address pc = 0, Thread* thread = NULL) { | |
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266 if (is_on() && NMT_CAN_TRACK(flags)) { |
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267 assert(size > 0, "Sanity check"); |
| 6197 | 268 create_memory_record(addr, (flags|MemPointerRecord::malloc_tag()), size, pc, thread); |
| 269 } | |
| 270 } | |
| 271 // record a 'free' call | |
| 272 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { | |
| 273 if (is_on() && NMT_CAN_TRACK(flags)) { | |
| 274 create_memory_record(addr, MemPointerRecord::free_tag(), 0, 0, thread); | |
| 275 } | |
| 276 } | |
| 277 // record a 'realloc' call | |
| 278 static inline void record_realloc(address old_addr, address new_addr, size_t size, | |
| 279 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { | |
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280 if (is_on() && NMT_CAN_TRACK(flags)) { |
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281 assert(size > 0, "Sanity check"); |
| 6197 | 282 record_free(old_addr, flags, thread); |
| 283 record_malloc(new_addr, size, flags, pc, thread); | |
| 284 } | |
| 285 } | |
| 286 | |
| 287 // record arena size | |
| 288 static inline void record_arena_size(address addr, size_t size) { | |
| 289 // we add a positive offset to arena address, so we can have arena size record | |
| 290 // sorted after arena record | |
| 291 if (is_on() && !UseMallocOnly) { | |
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292 assert(addr != NULL, "Sanity check"); |
| 6197 | 293 create_memory_record((addr + sizeof(void*)), MemPointerRecord::arena_size_tag(), size, |
| 294 0, NULL); | |
| 295 } | |
| 296 } | |
| 297 | |
| 298 // record a virtual memory 'reserve' call | |
| 299 static inline void record_virtual_memory_reserve(address addr, size_t size, | |
| 300 address pc = 0, Thread* thread = NULL) { | |
| 301 if (is_on()) { | |
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302 assert(size > 0, "Sanity check"); |
| 6197 | 303 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag(), |
| 304 size, pc, thread); | |
| 305 } | |
| 306 } | |
| 307 | |
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308 static inline void record_thread_stack(address addr, size_t size, Thread* thr, |
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309 address pc = 0) { |
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310 if (is_on()) { |
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311 assert(size > 0 && thr != NULL, "Sanity check"); |
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312 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag() | mtThreadStack, |
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313 size, pc, thr); |
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314 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag() | mtThreadStack, |
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315 size, pc, thr); |
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316 } |
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317 } |
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318 |
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319 static inline void release_thread_stack(address addr, size_t size, Thread* thr) { |
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320 if (is_on()) { |
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321 assert(size > 0 && thr != NULL, "Sanity check"); |
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322 assert(!thr->is_Java_thread(), "too early"); |
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323 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag() | mtThreadStack, |
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324 size, DEBUG_CALLER_PC, thr); |
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325 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag() | mtThreadStack, |
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326 size, DEBUG_CALLER_PC, thr); |
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327 } |
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328 } |
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329 |
| 6197 | 330 // record a virtual memory 'commit' call |
| 331 static inline void record_virtual_memory_commit(address addr, size_t size, | |
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332 address pc, Thread* thread = NULL) { |
| 6197 | 333 if (is_on()) { |
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334 assert(size > 0, "Sanity check"); |
| 6197 | 335 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag(), |
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336 size, pc, thread); |
| 6197 | 337 } |
| 338 } | |
| 339 | |
| 340 // record a virtual memory 'uncommit' call | |
| 341 static inline void record_virtual_memory_uncommit(address addr, size_t size, | |
| 342 Thread* thread = NULL) { | |
| 343 if (is_on()) { | |
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344 assert(size > 0, "Sanity check"); |
| 6197 | 345 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag(), |
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346 size, DEBUG_CALLER_PC, thread); |
| 6197 | 347 } |
| 348 } | |
| 349 | |
| 350 // record a virtual memory 'release' call | |
| 351 static inline void record_virtual_memory_release(address addr, size_t size, | |
| 352 Thread* thread = NULL) { | |
| 353 if (is_on()) { | |
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354 assert(size > 0, "Sanity check"); |
| 6197 | 355 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag(), |
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356 size, DEBUG_CALLER_PC, thread); |
| 6197 | 357 } |
| 358 } | |
| 359 | |
| 360 // record memory type on virtual memory base address | |
| 361 static inline void record_virtual_memory_type(address base, MEMFLAGS flags, | |
| 362 Thread* thread = NULL) { | |
| 363 if (is_on()) { | |
| 364 assert(base > 0, "wrong base address"); | |
| 365 assert((flags & (~mt_masks)) == 0, "memory type only"); | |
| 366 create_memory_record(base, (flags | MemPointerRecord::virtual_memory_type_tag()), | |
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367 0, DEBUG_CALLER_PC, thread); |
| 6197 | 368 } |
| 369 } | |
| 370 | |
| 371 | |
| 372 // create memory baseline of current memory snapshot | |
| 373 static bool baseline(); | |
| 374 // is there a memory baseline | |
| 375 static bool has_baseline() { | |
| 376 return _baseline.baselined(); | |
| 377 } | |
| 378 | |
| 379 // print memory usage from current snapshot | |
| 380 static bool print_memory_usage(BaselineOutputer& out, size_t unit, | |
| 381 bool summary_only = true); | |
| 382 // compare memory usage between current snapshot and baseline | |
| 383 static bool compare_memory_usage(BaselineOutputer& out, size_t unit, | |
| 384 bool summary_only = true); | |
| 385 | |
| 386 // sync is called within global safepoint to synchronize nmt data | |
| 387 static void sync(); | |
| 388 | |
| 389 // called when a thread is about to exit | |
| 390 static void thread_exiting(JavaThread* thread); | |
| 391 | |
| 392 // retrieve global snapshot | |
| 393 static MemSnapshot* get_snapshot() { | |
| 394 if (shutdown_in_progress()) { | |
| 395 return NULL; | |
| 396 } | |
| 397 return _snapshot; | |
| 398 } | |
| 399 | |
| 400 // print tracker stats | |
| 401 NOT_PRODUCT(static void print_tracker_stats(outputStream* st);) | |
| 402 NOT_PRODUCT(static void walk_stack(int toSkip, char* buf, int len);) | |
| 403 | |
| 404 private: | |
| 405 // start native memory tracking worker thread | |
| 406 static bool start_worker(); | |
| 407 | |
| 408 // called by worker thread to complete shutdown process | |
| 409 static void final_shutdown(); | |
| 410 | |
| 411 protected: | |
| 412 // retrieve per-thread recorder of the specified thread. | |
| 413 // if the recorder is full, it will be enqueued to overflow | |
| 414 // queue, a new recorder is acquired from recorder pool or a | |
| 415 // new instance is created. | |
| 416 // when thread == NULL, it means global recorder | |
| 417 static MemRecorder* get_thread_recorder(JavaThread* thread); | |
| 418 | |
| 419 // per-thread recorder pool | |
| 420 static void release_thread_recorder(MemRecorder* rec); | |
| 421 static void delete_all_pooled_recorders(); | |
| 422 | |
| 423 // pending recorder queue. Recorders are queued to pending queue | |
| 424 // when they are overflowed or collected at nmt sync point. | |
| 425 static void enqueue_pending_recorder(MemRecorder* rec); | |
| 426 static MemRecorder* get_pending_recorders(); | |
| 427 static void delete_all_pending_recorders(); | |
| 428 | |
| 429 private: | |
| 430 // retrieve a pooled memory record or create new one if there is not | |
| 431 // one available | |
| 432 static MemRecorder* get_new_or_pooled_instance(); | |
| 433 static void create_memory_record(address addr, MEMFLAGS type, | |
| 434 size_t size, address pc, Thread* thread); | |
| 435 static void create_record_in_recorder(address addr, MEMFLAGS type, | |
| 6231 | 436 size_t size, address pc, JavaThread* thread); |
| 6197 | 437 |
| 438 private: | |
| 439 // global memory snapshot | |
| 440 static MemSnapshot* _snapshot; | |
| 441 | |
| 442 // a memory baseline of snapshot | |
| 443 static MemBaseline _baseline; | |
| 444 | |
| 445 // query lock | |
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446 static Mutex* _query_lock; |
| 6197 | 447 |
| 448 // a thread can start to allocate memory before it is attached | |
| 449 // to VM 'Thread', those memory activities are recorded here. | |
| 450 // ThreadCritical is required to guard this global recorder. | |
| 451 static MemRecorder* _global_recorder; | |
| 452 | |
| 453 // main thread id | |
| 454 debug_only(static intx _main_thread_tid;) | |
| 455 | |
| 456 // pending recorders to be merged | |
| 457 static volatile MemRecorder* _merge_pending_queue; | |
| 458 | |
| 459 NOT_PRODUCT(static volatile jint _pending_recorder_count;) | |
| 460 | |
| 461 // pooled memory recorders | |
| 462 static volatile MemRecorder* _pooled_recorders; | |
| 463 | |
| 464 // memory recorder pool management, uses following | |
| 465 // counter to determine if a released memory recorder | |
| 466 // should be pooled | |
| 467 | |
| 468 // latest thread count | |
| 469 static int _thread_count; | |
| 470 // pooled recorder count | |
| 471 static volatile jint _pooled_recorder_count; | |
| 472 | |
| 473 | |
| 474 // worker thread to merge pending recorders into snapshot | |
| 475 static MemTrackWorker* _worker_thread; | |
| 476 | |
| 477 // how many safepoints we skipped without entering sync point | |
| 478 static int _sync_point_skip_count; | |
| 479 | |
| 480 // if the tracker is properly intialized | |
| 481 static bool _is_tracker_ready; | |
| 482 // tracking level (off, summary and detail) | |
| 483 static enum NMTLevel _tracking_level; | |
| 484 | |
| 485 // current nmt state | |
| 486 static volatile enum NMTStates _state; | |
| 487 // the reason for shutting down nmt | |
| 488 static enum ShutdownReason _reason; | |
| 489 }; | |
| 490 | |
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491 #endif // !INCLUDE_NMT |
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492 |
| 6197 | 493 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP |