Mercurial > hg > truffle
annotate src/share/vm/services/memTracker.hpp @ 7378:88506cfc3bab
Canonicalize ((a - a % b) / b) into (a / b).
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 15 Jan 2013 17:53:31 +0100 |
parents | f34d701e952e |
children | ecd24264898b |
rev | line source |
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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 | |
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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 | |
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112 extern bool NMT_track_callsite; |
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113 |
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114 #ifdef ASSERT |
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115 #define DEBUG_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) |
6197 | 116 #else |
117 #define DEBUG_CALLER_PC 0 | |
118 #endif | |
119 | |
120 // The thread closure walks threads to collect per-thread | |
121 // memory recorders at NMT sync point | |
122 class SyncThreadRecorderClosure : public ThreadClosure { | |
123 private: | |
124 int _thread_count; | |
125 | |
126 public: | |
127 SyncThreadRecorderClosure() { | |
128 _thread_count =0; | |
129 } | |
130 | |
131 void do_thread(Thread* thread); | |
132 int get_thread_count() const { | |
133 return _thread_count; | |
134 } | |
135 }; | |
136 | |
137 class BaselineOutputer; | |
138 class MemSnapshot; | |
139 class MemTrackWorker; | |
140 class Thread; | |
141 /* | |
142 * MemTracker is the 'gate' class to native memory tracking runtime. | |
143 */ | |
144 class MemTracker : AllStatic { | |
145 friend class MemTrackWorker; | |
146 friend class MemSnapshot; | |
147 friend class SyncThreadRecorderClosure; | |
148 | |
149 // NMT state | |
150 enum NMTStates { | |
151 NMT_uninited, // not yet initialized | |
152 NMT_bootstrapping_single_thread, // bootstrapping, VM is in single thread mode | |
153 NMT_bootstrapping_multi_thread, // bootstrapping, VM is about to enter multi-thread mode | |
154 NMT_started, // NMT fully started | |
155 NMT_shutdown_pending, // shutdown pending | |
156 NMT_final_shutdown, // in final phase of shutdown | |
157 NMT_shutdown // shutdown | |
158 }; | |
159 | |
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160 public: |
6197 | 161 // native memory tracking level |
162 enum NMTLevel { | |
163 NMT_off, // native memory tracking is off | |
164 NMT_summary, // don't track callsite | |
165 NMT_detail // track callsite also | |
166 }; | |
167 | |
168 enum ShutdownReason { | |
169 NMT_shutdown_none, // no shutdown requested | |
170 NMT_shutdown_user, // user requested shutdown | |
171 NMT_normal, // normal shutdown, process exit | |
172 NMT_out_of_memory, // shutdown due to out of memory | |
173 NMT_initialization, // shutdown due to initialization failure | |
174 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag | |
175 NMT_error_reporting, // shutdown by vmError::report_and_die() | |
176 NMT_out_of_generation, // running out of generation queue | |
177 NMT_sequence_overflow // overflow the sequence number | |
178 }; | |
179 | |
180 public: | |
181 // initialize NMT tracking level from command line options, called | |
182 // from VM command line parsing code | |
183 static void init_tracking_options(const char* option_line); | |
184 | |
185 // if NMT is enabled to record memory activities | |
186 static inline bool is_on() { | |
187 return (_tracking_level >= NMT_summary && | |
188 _state >= NMT_bootstrapping_single_thread); | |
189 } | |
190 | |
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191 static inline enum NMTLevel tracking_level() { |
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192 return _tracking_level; |
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193 } |
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194 |
6197 | 195 // user readable reason for shutting down NMT |
196 static const char* reason() { | |
197 switch(_reason) { | |
198 case NMT_shutdown_none: | |
199 return "Native memory tracking is not enabled"; | |
200 case NMT_shutdown_user: | |
201 return "Native memory tracking has been shutdown by user"; | |
202 case NMT_normal: | |
203 return "Native memory tracking has been shutdown due to process exiting"; | |
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204 case NMT_out_of_memory: |
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205 return "Native memory tracking has been shutdown due to out of native memory"; |
6197 | 206 case NMT_initialization: |
207 return "Native memory tracking failed to initialize"; | |
208 case NMT_error_reporting: | |
209 return "Native memory tracking has been shutdown due to error reporting"; | |
210 case NMT_out_of_generation: | |
211 return "Native memory tracking has been shutdown due to running out of generation buffer"; | |
212 case NMT_sequence_overflow: | |
213 return "Native memory tracking has been shutdown due to overflow the sequence number"; | |
214 case NMT_use_malloc_only: | |
215 return "Native memory tracking is not supported when UseMallocOnly is on"; | |
216 default: | |
217 ShouldNotReachHere(); | |
218 return NULL; | |
219 } | |
220 } | |
221 | |
222 // test if we can walk native stack | |
223 static bool can_walk_stack() { | |
224 // native stack is not walkable during bootstrapping on sparc | |
225 #if defined(SPARC) | |
226 return (_state == NMT_started); | |
227 #else | |
228 return (_state >= NMT_bootstrapping_single_thread && _state <= NMT_started); | |
229 #endif | |
230 } | |
231 | |
232 // if native memory tracking tracks callsite | |
233 static inline bool track_callsite() { return _tracking_level == NMT_detail; } | |
234 | |
235 // shutdown native memory tracking capability. Native memory tracking | |
236 // can be shutdown by VM when it encounters low memory scenarios. | |
237 // Memory tracker should gracefully shutdown itself, and preserve the | |
238 // latest memory statistics for post morten diagnosis. | |
239 static void shutdown(ShutdownReason reason); | |
240 | |
241 // if there is shutdown requested | |
242 static inline bool shutdown_in_progress() { | |
243 return (_state >= NMT_shutdown_pending); | |
244 } | |
245 | |
246 // bootstrap native memory tracking, so it can start to collect raw data | |
247 // before worker thread can start | |
248 | |
249 // the first phase of bootstrapping, when VM still in single-threaded mode | |
250 static void bootstrap_single_thread(); | |
251 // the second phase of bootstrapping, VM is about or already in multi-threaded mode | |
252 static void bootstrap_multi_thread(); | |
253 | |
254 | |
255 // start() has to be called when VM still in single thread mode, but after | |
256 // command line option parsing is done. | |
257 static void start(); | |
258 | |
259 // record a 'malloc' call | |
260 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags, | |
261 address pc = 0, Thread* thread = NULL) { | |
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262 if (is_on() && NMT_CAN_TRACK(flags)) { |
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263 assert(size > 0, "Sanity check"); |
6197 | 264 create_memory_record(addr, (flags|MemPointerRecord::malloc_tag()), size, pc, thread); |
265 } | |
266 } | |
267 // record a 'free' call | |
268 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { | |
269 if (is_on() && NMT_CAN_TRACK(flags)) { | |
270 create_memory_record(addr, MemPointerRecord::free_tag(), 0, 0, thread); | |
271 } | |
272 } | |
273 // record a 'realloc' call | |
274 static inline void record_realloc(address old_addr, address new_addr, size_t size, | |
275 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { | |
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276 if (is_on() && NMT_CAN_TRACK(flags)) { |
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277 assert(size > 0, "Sanity check"); |
6197 | 278 record_free(old_addr, flags, thread); |
279 record_malloc(new_addr, size, flags, pc, thread); | |
280 } | |
281 } | |
282 | |
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283 // record arena memory size |
6197 | 284 static inline void record_arena_size(address addr, size_t size) { |
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285 // we add a positive offset to arena address, so we can have arena memory record |
6197 | 286 // sorted after arena record |
287 if (is_on() && !UseMallocOnly) { | |
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288 assert(addr != NULL, "Sanity check"); |
6197 | 289 create_memory_record((addr + sizeof(void*)), MemPointerRecord::arena_size_tag(), size, |
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290 DEBUG_CALLER_PC, NULL); |
6197 | 291 } |
292 } | |
293 | |
294 // record a virtual memory 'reserve' call | |
295 static inline void record_virtual_memory_reserve(address addr, size_t size, | |
296 address pc = 0, Thread* thread = NULL) { | |
297 if (is_on()) { | |
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298 assert(size > 0, "Sanity check"); |
6197 | 299 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag(), |
300 size, pc, thread); | |
301 } | |
302 } | |
303 | |
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304 static inline void record_thread_stack(address addr, size_t size, Thread* thr, |
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305 address pc = 0) { |
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306 if (is_on()) { |
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307 assert(size > 0 && thr != NULL, "Sanity check"); |
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308 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag() | mtThreadStack, |
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309 size, pc, thr); |
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310 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag() | mtThreadStack, |
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311 size, pc, thr); |
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312 } |
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313 } |
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314 |
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315 static inline void release_thread_stack(address addr, size_t size, Thread* thr) { |
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316 if (is_on()) { |
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317 assert(size > 0 && thr != NULL, "Sanity check"); |
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318 assert(!thr->is_Java_thread(), "too early"); |
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319 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag() | mtThreadStack, |
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320 size, DEBUG_CALLER_PC, thr); |
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321 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag() | mtThreadStack, |
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322 size, DEBUG_CALLER_PC, thr); |
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323 } |
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324 } |
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325 |
6197 | 326 // record a virtual memory 'commit' call |
327 static inline void record_virtual_memory_commit(address addr, size_t size, | |
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328 address pc, Thread* thread = NULL) { |
6197 | 329 if (is_on()) { |
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330 assert(size > 0, "Sanity check"); |
6197 | 331 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag(), |
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332 size, pc, thread); |
6197 | 333 } |
334 } | |
335 | |
336 // record a virtual memory 'uncommit' call | |
337 static inline void record_virtual_memory_uncommit(address addr, size_t size, | |
338 Thread* thread = NULL) { | |
339 if (is_on()) { | |
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340 assert(size > 0, "Sanity check"); |
6197 | 341 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag(), |
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342 size, DEBUG_CALLER_PC, thread); |
6197 | 343 } |
344 } | |
345 | |
346 // record a virtual memory 'release' call | |
347 static inline void record_virtual_memory_release(address addr, size_t size, | |
348 Thread* thread = NULL) { | |
349 if (is_on()) { | |
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350 assert(size > 0, "Sanity check"); |
6197 | 351 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag(), |
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352 size, DEBUG_CALLER_PC, thread); |
6197 | 353 } |
354 } | |
355 | |
356 // record memory type on virtual memory base address | |
357 static inline void record_virtual_memory_type(address base, MEMFLAGS flags, | |
358 Thread* thread = NULL) { | |
359 if (is_on()) { | |
360 assert(base > 0, "wrong base address"); | |
361 assert((flags & (~mt_masks)) == 0, "memory type only"); | |
362 create_memory_record(base, (flags | MemPointerRecord::virtual_memory_type_tag()), | |
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363 0, DEBUG_CALLER_PC, thread); |
6197 | 364 } |
365 } | |
366 | |
367 | |
368 // create memory baseline of current memory snapshot | |
369 static bool baseline(); | |
370 // is there a memory baseline | |
371 static bool has_baseline() { | |
372 return _baseline.baselined(); | |
373 } | |
374 | |
375 // print memory usage from current snapshot | |
376 static bool print_memory_usage(BaselineOutputer& out, size_t unit, | |
377 bool summary_only = true); | |
378 // compare memory usage between current snapshot and baseline | |
379 static bool compare_memory_usage(BaselineOutputer& out, size_t unit, | |
380 bool summary_only = true); | |
381 | |
382 // sync is called within global safepoint to synchronize nmt data | |
383 static void sync(); | |
384 | |
385 // called when a thread is about to exit | |
386 static void thread_exiting(JavaThread* thread); | |
387 | |
388 // retrieve global snapshot | |
389 static MemSnapshot* get_snapshot() { | |
390 if (shutdown_in_progress()) { | |
391 return NULL; | |
392 } | |
393 return _snapshot; | |
394 } | |
395 | |
396 // print tracker stats | |
397 NOT_PRODUCT(static void print_tracker_stats(outputStream* st);) | |
398 NOT_PRODUCT(static void walk_stack(int toSkip, char* buf, int len);) | |
399 | |
400 private: | |
401 // start native memory tracking worker thread | |
402 static bool start_worker(); | |
403 | |
404 // called by worker thread to complete shutdown process | |
405 static void final_shutdown(); | |
406 | |
407 protected: | |
408 // retrieve per-thread recorder of the specified thread. | |
409 // if the recorder is full, it will be enqueued to overflow | |
410 // queue, a new recorder is acquired from recorder pool or a | |
411 // new instance is created. | |
412 // when thread == NULL, it means global recorder | |
413 static MemRecorder* get_thread_recorder(JavaThread* thread); | |
414 | |
415 // per-thread recorder pool | |
416 static void release_thread_recorder(MemRecorder* rec); | |
417 static void delete_all_pooled_recorders(); | |
418 | |
419 // pending recorder queue. Recorders are queued to pending queue | |
420 // when they are overflowed or collected at nmt sync point. | |
421 static void enqueue_pending_recorder(MemRecorder* rec); | |
422 static MemRecorder* get_pending_recorders(); | |
423 static void delete_all_pending_recorders(); | |
424 | |
425 private: | |
426 // retrieve a pooled memory record or create new one if there is not | |
427 // one available | |
428 static MemRecorder* get_new_or_pooled_instance(); | |
429 static void create_memory_record(address addr, MEMFLAGS type, | |
430 size_t size, address pc, Thread* thread); | |
431 static void create_record_in_recorder(address addr, MEMFLAGS type, | |
6231 | 432 size_t size, address pc, JavaThread* thread); |
6197 | 433 |
434 private: | |
435 // global memory snapshot | |
436 static MemSnapshot* _snapshot; | |
437 | |
438 // a memory baseline of snapshot | |
439 static MemBaseline _baseline; | |
440 | |
441 // query lock | |
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442 static Mutex* _query_lock; |
6197 | 443 |
444 // a thread can start to allocate memory before it is attached | |
445 // to VM 'Thread', those memory activities are recorded here. | |
446 // ThreadCritical is required to guard this global recorder. | |
447 static MemRecorder* _global_recorder; | |
448 | |
449 // main thread id | |
450 debug_only(static intx _main_thread_tid;) | |
451 | |
452 // pending recorders to be merged | |
453 static volatile MemRecorder* _merge_pending_queue; | |
454 | |
455 NOT_PRODUCT(static volatile jint _pending_recorder_count;) | |
456 | |
457 // pooled memory recorders | |
458 static volatile MemRecorder* _pooled_recorders; | |
459 | |
460 // memory recorder pool management, uses following | |
461 // counter to determine if a released memory recorder | |
462 // should be pooled | |
463 | |
464 // latest thread count | |
465 static int _thread_count; | |
466 // pooled recorder count | |
467 static volatile jint _pooled_recorder_count; | |
468 | |
469 | |
470 // worker thread to merge pending recorders into snapshot | |
471 static MemTrackWorker* _worker_thread; | |
472 | |
473 // how many safepoints we skipped without entering sync point | |
474 static int _sync_point_skip_count; | |
475 | |
476 // if the tracker is properly intialized | |
477 static bool _is_tracker_ready; | |
478 // tracking level (off, summary and detail) | |
479 static enum NMTLevel _tracking_level; | |
480 | |
481 // current nmt state | |
482 static volatile enum NMTStates _state; | |
483 // the reason for shutting down nmt | |
484 static enum ShutdownReason _reason; | |
485 }; | |
486 | |
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487 #endif // !INCLUDE_NMT |
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488 |
6197 | 489 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP |