Mercurial > hg > truffle
annotate src/share/vm/services/memTracker.hpp @ 8125:0026a2e70695
Merge fixes.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 05 Mar 2013 23:58:57 +0100 |
parents | 4102b59539ce |
children | 06db4c0afbf3 |
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 bool wbtest_wait_for_data_merge() { } |
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95 |
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96 static inline void sync() { } |
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97 static inline void thread_exiting(JavaThread* thread) { } |
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98 }; |
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99 |
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100 |
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101 #else // !INCLUDE_NMT |
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102 |
6197 | 103 #include "memory/allocation.hpp" |
104 #include "runtime/globals.hpp" | |
105 #include "runtime/mutex.hpp" | |
106 #include "runtime/os.hpp" | |
107 #include "runtime/thread.hpp" | |
108 #include "services/memPtr.hpp" | |
109 #include "services/memRecorder.hpp" | |
110 #include "services/memSnapshot.hpp" | |
111 #include "services/memTrackWorker.hpp" | |
112 | |
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113 extern bool NMT_track_callsite; |
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114 |
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115 #ifndef MAX_UNSIGNED_LONG |
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116 #define MAX_UNSIGNED_LONG (unsigned long)(-1) |
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117 #endif |
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118 |
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119 #ifdef ASSERT |
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120 #define DEBUG_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) |
6197 | 121 #else |
122 #define DEBUG_CALLER_PC 0 | |
123 #endif | |
124 | |
125 // The thread closure walks threads to collect per-thread | |
126 // memory recorders at NMT sync point | |
127 class SyncThreadRecorderClosure : public ThreadClosure { | |
128 private: | |
129 int _thread_count; | |
130 | |
131 public: | |
132 SyncThreadRecorderClosure() { | |
133 _thread_count =0; | |
134 } | |
135 | |
136 void do_thread(Thread* thread); | |
137 int get_thread_count() const { | |
138 return _thread_count; | |
139 } | |
140 }; | |
141 | |
142 class BaselineOutputer; | |
143 class MemSnapshot; | |
144 class MemTrackWorker; | |
145 class Thread; | |
146 /* | |
147 * MemTracker is the 'gate' class to native memory tracking runtime. | |
148 */ | |
149 class MemTracker : AllStatic { | |
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150 friend class GenerationData; |
6197 | 151 friend class MemTrackWorker; |
152 friend class MemSnapshot; | |
153 friend class SyncThreadRecorderClosure; | |
154 | |
155 // NMT state | |
156 enum NMTStates { | |
157 NMT_uninited, // not yet initialized | |
158 NMT_bootstrapping_single_thread, // bootstrapping, VM is in single thread mode | |
159 NMT_bootstrapping_multi_thread, // bootstrapping, VM is about to enter multi-thread mode | |
160 NMT_started, // NMT fully started | |
161 NMT_shutdown_pending, // shutdown pending | |
162 NMT_final_shutdown, // in final phase of shutdown | |
163 NMT_shutdown // shutdown | |
164 }; | |
165 | |
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166 public: |
6197 | 167 // native memory tracking level |
168 enum NMTLevel { | |
169 NMT_off, // native memory tracking is off | |
170 NMT_summary, // don't track callsite | |
171 NMT_detail // track callsite also | |
172 }; | |
173 | |
174 enum ShutdownReason { | |
175 NMT_shutdown_none, // no shutdown requested | |
176 NMT_shutdown_user, // user requested shutdown | |
177 NMT_normal, // normal shutdown, process exit | |
178 NMT_out_of_memory, // shutdown due to out of memory | |
179 NMT_initialization, // shutdown due to initialization failure | |
180 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag | |
181 NMT_error_reporting, // shutdown by vmError::report_and_die() | |
182 NMT_out_of_generation, // running out of generation queue | |
183 NMT_sequence_overflow // overflow the sequence number | |
184 }; | |
185 | |
186 public: | |
187 // initialize NMT tracking level from command line options, called | |
188 // from VM command line parsing code | |
189 static void init_tracking_options(const char* option_line); | |
190 | |
191 // if NMT is enabled to record memory activities | |
192 static inline bool is_on() { | |
193 return (_tracking_level >= NMT_summary && | |
194 _state >= NMT_bootstrapping_single_thread); | |
195 } | |
196 | |
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197 static inline enum NMTLevel tracking_level() { |
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198 return _tracking_level; |
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199 } |
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200 |
6197 | 201 // user readable reason for shutting down NMT |
202 static const char* reason() { | |
203 switch(_reason) { | |
204 case NMT_shutdown_none: | |
205 return "Native memory tracking is not enabled"; | |
206 case NMT_shutdown_user: | |
207 return "Native memory tracking has been shutdown by user"; | |
208 case NMT_normal: | |
209 return "Native memory tracking has been shutdown due to process exiting"; | |
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210 case NMT_out_of_memory: |
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211 return "Native memory tracking has been shutdown due to out of native memory"; |
6197 | 212 case NMT_initialization: |
213 return "Native memory tracking failed to initialize"; | |
214 case NMT_error_reporting: | |
215 return "Native memory tracking has been shutdown due to error reporting"; | |
216 case NMT_out_of_generation: | |
217 return "Native memory tracking has been shutdown due to running out of generation buffer"; | |
218 case NMT_sequence_overflow: | |
219 return "Native memory tracking has been shutdown due to overflow the sequence number"; | |
220 case NMT_use_malloc_only: | |
221 return "Native memory tracking is not supported when UseMallocOnly is on"; | |
222 default: | |
223 ShouldNotReachHere(); | |
224 return NULL; | |
225 } | |
226 } | |
227 | |
228 // test if we can walk native stack | |
229 static bool can_walk_stack() { | |
230 // native stack is not walkable during bootstrapping on sparc | |
231 #if defined(SPARC) | |
232 return (_state == NMT_started); | |
233 #else | |
234 return (_state >= NMT_bootstrapping_single_thread && _state <= NMT_started); | |
235 #endif | |
236 } | |
237 | |
238 // if native memory tracking tracks callsite | |
239 static inline bool track_callsite() { return _tracking_level == NMT_detail; } | |
240 | |
241 // shutdown native memory tracking capability. Native memory tracking | |
242 // can be shutdown by VM when it encounters low memory scenarios. | |
243 // Memory tracker should gracefully shutdown itself, and preserve the | |
244 // latest memory statistics for post morten diagnosis. | |
245 static void shutdown(ShutdownReason reason); | |
246 | |
247 // if there is shutdown requested | |
248 static inline bool shutdown_in_progress() { | |
249 return (_state >= NMT_shutdown_pending); | |
250 } | |
251 | |
252 // bootstrap native memory tracking, so it can start to collect raw data | |
253 // before worker thread can start | |
254 | |
255 // the first phase of bootstrapping, when VM still in single-threaded mode | |
256 static void bootstrap_single_thread(); | |
257 // the second phase of bootstrapping, VM is about or already in multi-threaded mode | |
258 static void bootstrap_multi_thread(); | |
259 | |
260 | |
261 // start() has to be called when VM still in single thread mode, but after | |
262 // command line option parsing is done. | |
263 static void start(); | |
264 | |
265 // record a 'malloc' call | |
266 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags, | |
267 address pc = 0, Thread* thread = NULL) { | |
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268 if (is_on() && NMT_CAN_TRACK(flags)) { |
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269 assert(size > 0, "Sanity check"); |
6197 | 270 create_memory_record(addr, (flags|MemPointerRecord::malloc_tag()), size, pc, thread); |
271 } | |
272 } | |
273 // record a 'free' call | |
274 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { | |
275 if (is_on() && NMT_CAN_TRACK(flags)) { | |
276 create_memory_record(addr, MemPointerRecord::free_tag(), 0, 0, thread); | |
277 } | |
278 } | |
279 // record a 'realloc' call | |
280 static inline void record_realloc(address old_addr, address new_addr, size_t size, | |
281 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { | |
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282 if (is_on() && NMT_CAN_TRACK(flags)) { |
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283 assert(size > 0, "Sanity check"); |
6197 | 284 record_free(old_addr, flags, thread); |
285 record_malloc(new_addr, size, flags, pc, thread); | |
286 } | |
287 } | |
288 | |
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289 // record arena memory size |
6197 | 290 static inline void record_arena_size(address addr, size_t size) { |
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291 // we add a positive offset to arena address, so we can have arena memory record |
6197 | 292 // sorted after arena record |
293 if (is_on() && !UseMallocOnly) { | |
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294 assert(addr != NULL, "Sanity check"); |
6197 | 295 create_memory_record((addr + sizeof(void*)), MemPointerRecord::arena_size_tag(), size, |
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296 DEBUG_CALLER_PC, NULL); |
6197 | 297 } |
298 } | |
299 | |
300 // record a virtual memory 'reserve' call | |
301 static inline void record_virtual_memory_reserve(address addr, size_t size, | |
302 address pc = 0, Thread* thread = NULL) { | |
303 if (is_on()) { | |
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304 assert(size > 0, "Sanity check"); |
6197 | 305 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag(), |
306 size, pc, thread); | |
307 } | |
308 } | |
309 | |
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310 static inline void record_thread_stack(address addr, size_t size, Thread* thr, |
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311 address pc = 0) { |
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312 if (is_on()) { |
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313 assert(size > 0 && thr != NULL, "Sanity check"); |
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314 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag() | mtThreadStack, |
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315 size, pc, thr); |
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316 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag() | mtThreadStack, |
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317 size, pc, thr); |
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318 } |
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319 } |
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320 |
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321 static inline void release_thread_stack(address addr, size_t size, Thread* thr) { |
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322 if (is_on()) { |
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323 assert(size > 0 && thr != NULL, "Sanity check"); |
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324 assert(!thr->is_Java_thread(), "too early"); |
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325 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag() | mtThreadStack, |
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326 size, DEBUG_CALLER_PC, thr); |
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327 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag() | mtThreadStack, |
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328 size, DEBUG_CALLER_PC, thr); |
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329 } |
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330 } |
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331 |
6197 | 332 // record a virtual memory 'commit' call |
333 static inline void record_virtual_memory_commit(address addr, size_t size, | |
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334 address pc, Thread* thread = NULL) { |
6197 | 335 if (is_on()) { |
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336 assert(size > 0, "Sanity check"); |
6197 | 337 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag(), |
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338 size, pc, thread); |
6197 | 339 } |
340 } | |
341 | |
342 // record a virtual memory 'uncommit' call | |
343 static inline void record_virtual_memory_uncommit(address addr, size_t size, | |
344 Thread* thread = NULL) { | |
345 if (is_on()) { | |
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346 assert(size > 0, "Sanity check"); |
6197 | 347 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag(), |
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348 size, DEBUG_CALLER_PC, thread); |
6197 | 349 } |
350 } | |
351 | |
352 // record a virtual memory 'release' call | |
353 static inline void record_virtual_memory_release(address addr, size_t size, | |
354 Thread* thread = NULL) { | |
355 if (is_on()) { | |
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356 assert(size > 0, "Sanity check"); |
6197 | 357 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag(), |
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358 size, DEBUG_CALLER_PC, thread); |
6197 | 359 } |
360 } | |
361 | |
362 // record memory type on virtual memory base address | |
363 static inline void record_virtual_memory_type(address base, MEMFLAGS flags, | |
364 Thread* thread = NULL) { | |
365 if (is_on()) { | |
366 assert(base > 0, "wrong base address"); | |
367 assert((flags & (~mt_masks)) == 0, "memory type only"); | |
368 create_memory_record(base, (flags | MemPointerRecord::virtual_memory_type_tag()), | |
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369 0, DEBUG_CALLER_PC, thread); |
6197 | 370 } |
371 } | |
372 | |
373 | |
374 // create memory baseline of current memory snapshot | |
375 static bool baseline(); | |
376 // is there a memory baseline | |
377 static bool has_baseline() { | |
378 return _baseline.baselined(); | |
379 } | |
380 | |
381 // print memory usage from current snapshot | |
382 static bool print_memory_usage(BaselineOutputer& out, size_t unit, | |
383 bool summary_only = true); | |
384 // compare memory usage between current snapshot and baseline | |
385 static bool compare_memory_usage(BaselineOutputer& out, size_t unit, | |
386 bool summary_only = true); | |
387 | |
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388 // the version for whitebox testing support, it ensures that all memory |
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389 // activities before this method call, are reflected in the snapshot |
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390 // database. |
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391 static bool wbtest_wait_for_data_merge(); |
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392 |
6197 | 393 // sync is called within global safepoint to synchronize nmt data |
394 static void sync(); | |
395 | |
396 // called when a thread is about to exit | |
397 static void thread_exiting(JavaThread* thread); | |
398 | |
399 // retrieve global snapshot | |
400 static MemSnapshot* get_snapshot() { | |
401 if (shutdown_in_progress()) { | |
402 return NULL; | |
403 } | |
404 return _snapshot; | |
405 } | |
406 | |
407 // print tracker stats | |
408 NOT_PRODUCT(static void print_tracker_stats(outputStream* st);) | |
409 NOT_PRODUCT(static void walk_stack(int toSkip, char* buf, int len);) | |
410 | |
411 private: | |
412 // start native memory tracking worker thread | |
413 static bool start_worker(); | |
414 | |
415 // called by worker thread to complete shutdown process | |
416 static void final_shutdown(); | |
417 | |
418 protected: | |
419 // retrieve per-thread recorder of the specified thread. | |
420 // if the recorder is full, it will be enqueued to overflow | |
421 // queue, a new recorder is acquired from recorder pool or a | |
422 // new instance is created. | |
423 // when thread == NULL, it means global recorder | |
424 static MemRecorder* get_thread_recorder(JavaThread* thread); | |
425 | |
426 // per-thread recorder pool | |
427 static void release_thread_recorder(MemRecorder* rec); | |
428 static void delete_all_pooled_recorders(); | |
429 | |
430 // pending recorder queue. Recorders are queued to pending queue | |
431 // when they are overflowed or collected at nmt sync point. | |
432 static void enqueue_pending_recorder(MemRecorder* rec); | |
433 static MemRecorder* get_pending_recorders(); | |
434 static void delete_all_pending_recorders(); | |
435 | |
436 private: | |
437 // retrieve a pooled memory record or create new one if there is not | |
438 // one available | |
439 static MemRecorder* get_new_or_pooled_instance(); | |
440 static void create_memory_record(address addr, MEMFLAGS type, | |
441 size_t size, address pc, Thread* thread); | |
442 static void create_record_in_recorder(address addr, MEMFLAGS type, | |
6231 | 443 size_t size, address pc, JavaThread* thread); |
6197 | 444 |
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445 static void set_current_processing_generation(unsigned long generation) { |
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446 _worker_thread_idle = false; |
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447 _processing_generation = generation; |
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448 } |
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449 |
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450 static void report_worker_idle() { |
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451 _worker_thread_idle = true; |
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452 } |
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453 |
6197 | 454 private: |
455 // global memory snapshot | |
456 static MemSnapshot* _snapshot; | |
457 | |
458 // a memory baseline of snapshot | |
459 static MemBaseline _baseline; | |
460 | |
461 // query lock | |
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462 static Mutex* _query_lock; |
6197 | 463 |
464 // a thread can start to allocate memory before it is attached | |
465 // to VM 'Thread', those memory activities are recorded here. | |
466 // ThreadCritical is required to guard this global recorder. | |
467 static MemRecorder* _global_recorder; | |
468 | |
469 // main thread id | |
470 debug_only(static intx _main_thread_tid;) | |
471 | |
472 // pending recorders to be merged | |
473 static volatile MemRecorder* _merge_pending_queue; | |
474 | |
475 NOT_PRODUCT(static volatile jint _pending_recorder_count;) | |
476 | |
477 // pooled memory recorders | |
478 static volatile MemRecorder* _pooled_recorders; | |
479 | |
480 // memory recorder pool management, uses following | |
481 // counter to determine if a released memory recorder | |
482 // should be pooled | |
483 | |
484 // latest thread count | |
485 static int _thread_count; | |
486 // pooled recorder count | |
487 static volatile jint _pooled_recorder_count; | |
488 | |
489 | |
490 // worker thread to merge pending recorders into snapshot | |
491 static MemTrackWorker* _worker_thread; | |
492 | |
493 // how many safepoints we skipped without entering sync point | |
494 static int _sync_point_skip_count; | |
495 | |
496 // if the tracker is properly intialized | |
497 static bool _is_tracker_ready; | |
498 // tracking level (off, summary and detail) | |
499 static enum NMTLevel _tracking_level; | |
500 | |
501 // current nmt state | |
502 static volatile enum NMTStates _state; | |
503 // the reason for shutting down nmt | |
504 static enum ShutdownReason _reason; | |
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505 // the generation that NMT is processing |
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506 static volatile unsigned long _processing_generation; |
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507 // although NMT is still procesing current generation, but |
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508 // there is not more recorder to process, set idle state |
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509 static volatile bool _worker_thread_idle; |
6197 | 510 }; |
511 | |
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512 #endif // !INCLUDE_NMT |
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513 |
6197 | 514 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP |