Mercurial > hg > graal-compiler
annotate src/share/vm/services/memoryManager.hpp @ 1766:02f0a9b6f654
6969586: OptimizeStringConcat: SIGSEGV in LoadNode::Value()
Reviewed-by: kvn
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date | Mon, 30 Aug 2010 17:27:35 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // A memory manager is responsible for managing one or more memory pools. | |
26 // The garbage collector is one type of memory managers responsible | |
27 // for reclaiming memory occupied by unreachable objects. A Java virtual | |
28 // machine may have one or more memory managers. It may | |
29 // add or remove memory managers during execution. | |
30 // A memory pool can be managed by more than one memory managers. | |
31 | |
32 class MemoryPool; | |
33 class GCMemoryManager; | |
34 class OopClosure; | |
35 | |
36 class MemoryManager : public CHeapObj { | |
37 private: | |
38 enum { | |
39 max_num_pools = 10 | |
40 }; | |
41 | |
42 MemoryPool* _pools[max_num_pools]; | |
43 int _num_pools; | |
44 | |
45 protected: | |
46 volatile instanceOop _memory_mgr_obj; | |
47 | |
48 public: | |
49 enum Name { | |
50 Abstract, | |
51 CodeCache, | |
52 Copy, | |
53 MarkSweepCompact, | |
54 ParNew, | |
55 ConcurrentMarkSweep, | |
56 PSScavenge, | |
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57 PSMarkSweep, |
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58 G1YoungGen, |
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59 G1OldGen |
0 | 60 }; |
61 | |
62 MemoryManager(); | |
63 | |
64 int num_memory_pools() const { return _num_pools; } | |
65 MemoryPool* get_memory_pool(int index) { | |
66 assert(index >= 0 && index < _num_pools, "Invalid index"); | |
67 return _pools[index]; | |
68 } | |
69 | |
70 void add_pool(MemoryPool* pool); | |
71 | |
72 bool is_manager(instanceHandle mh) { return mh() == _memory_mgr_obj; } | |
73 | |
74 virtual instanceOop get_memory_manager_instance(TRAPS); | |
75 virtual MemoryManager::Name kind() { return MemoryManager::Abstract; } | |
76 virtual bool is_gc_memory_manager() { return false; } | |
77 virtual const char* name() = 0; | |
78 | |
79 // GC support | |
80 void oops_do(OopClosure* f); | |
81 | |
82 // Static factory methods to get a memory manager of a specific type | |
83 static MemoryManager* get_code_cache_memory_manager(); | |
84 static GCMemoryManager* get_copy_memory_manager(); | |
85 static GCMemoryManager* get_msc_memory_manager(); | |
86 static GCMemoryManager* get_parnew_memory_manager(); | |
87 static GCMemoryManager* get_cms_memory_manager(); | |
88 static GCMemoryManager* get_psScavenge_memory_manager(); | |
89 static GCMemoryManager* get_psMarkSweep_memory_manager(); | |
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90 static GCMemoryManager* get_g1YoungGen_memory_manager(); |
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91 static GCMemoryManager* get_g1OldGen_memory_manager(); |
0 | 92 |
93 }; | |
94 | |
95 class CodeCacheMemoryManager : public MemoryManager { | |
96 private: | |
97 public: | |
98 CodeCacheMemoryManager() : MemoryManager() {} | |
99 | |
100 MemoryManager::Name kind() { return MemoryManager::CodeCache; } | |
101 const char* name() { return "CodeCacheManager"; } | |
102 }; | |
103 | |
104 class GCStatInfo : public CHeapObj { | |
105 private: | |
106 size_t _index; | |
107 jlong _start_time; | |
108 jlong _end_time; | |
109 | |
110 // We keep memory usage of all memory pools | |
111 MemoryUsage* _before_gc_usage_array; | |
112 MemoryUsage* _after_gc_usage_array; | |
113 int _usage_array_size; | |
114 | |
115 void set_gc_usage(int pool_index, MemoryUsage, bool before_gc); | |
116 | |
117 public: | |
118 GCStatInfo(int num_pools); | |
119 ~GCStatInfo(); | |
120 | |
121 size_t gc_index() { return _index; } | |
122 jlong start_time() { return _start_time; } | |
123 jlong end_time() { return _end_time; } | |
124 int usage_array_size() { return _usage_array_size; } | |
125 MemoryUsage before_gc_usage_for_pool(int pool_index) { | |
126 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
127 return _before_gc_usage_array[pool_index]; | |
128 } | |
129 MemoryUsage after_gc_usage_for_pool(int pool_index) { | |
130 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
131 return _after_gc_usage_array[pool_index]; | |
132 } | |
133 | |
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134 MemoryUsage* before_gc_usage_array() { return _before_gc_usage_array; } |
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135 MemoryUsage* after_gc_usage_array() { return _after_gc_usage_array; } |
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136 |
0 | 137 void set_index(size_t index) { _index = index; } |
138 void set_start_time(jlong time) { _start_time = time; } | |
139 void set_end_time(jlong time) { _end_time = time; } | |
140 void set_before_gc_usage(int pool_index, MemoryUsage usage) { | |
141 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
142 set_gc_usage(pool_index, usage, true /* before gc */); | |
143 } | |
144 void set_after_gc_usage(int pool_index, MemoryUsage usage) { | |
145 assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking"); | |
146 set_gc_usage(pool_index, usage, false /* after gc */); | |
147 } | |
148 | |
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149 void clear(); |
0 | 150 }; |
151 | |
152 class GCMemoryManager : public MemoryManager { | |
153 private: | |
154 // TODO: We should unify the GCCounter and GCMemoryManager statistic | |
155 size_t _num_collections; | |
156 elapsedTimer _accumulated_timer; | |
157 elapsedTimer _gc_timer; // for measuring every GC duration | |
158 GCStatInfo* _last_gc_stat; | |
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159 Mutex* _last_gc_lock; |
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160 GCStatInfo* _current_gc_stat; |
0 | 161 int _num_gc_threads; |
162 public: | |
163 GCMemoryManager(); | |
164 ~GCMemoryManager(); | |
165 | |
166 void initialize_gc_stat_info(); | |
167 | |
168 bool is_gc_memory_manager() { return true; } | |
169 jlong gc_time_ms() { return _accumulated_timer.milliseconds(); } | |
170 size_t gc_count() { return _num_collections; } | |
171 int num_gc_threads() { return _num_gc_threads; } | |
172 void set_num_gc_threads(int count) { _num_gc_threads = count; } | |
173 | |
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174 void gc_begin(bool recordGCBeginTime, bool recordPreGCUsage, |
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175 bool recordAccumulatedGCTime); |
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176 void gc_end(bool recordPostGCUsage, bool recordAccumulatedGCTime, |
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177 bool recordGCEndTime, bool countCollection); |
0 | 178 |
179 void reset_gc_stat() { _num_collections = 0; _accumulated_timer.reset(); } | |
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180 |
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181 // Copy out _last_gc_stat to the given destination, returning |
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182 // the collection count. Zero signifies no gc has taken place. |
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183 size_t get_last_gc_stat(GCStatInfo* dest); |
0 | 184 |
185 virtual MemoryManager::Name kind() = 0; | |
186 }; | |
187 | |
188 // These subclasses of GCMemoryManager are defined to include | |
189 // GC-specific information. | |
190 // TODO: Add GC-specific information | |
191 class CopyMemoryManager : public GCMemoryManager { | |
192 private: | |
193 public: | |
194 CopyMemoryManager() : GCMemoryManager() {} | |
195 | |
196 MemoryManager::Name kind() { return MemoryManager::Copy; } | |
197 const char* name() { return "Copy"; } | |
198 }; | |
199 | |
200 class MSCMemoryManager : public GCMemoryManager { | |
201 private: | |
202 public: | |
203 MSCMemoryManager() : GCMemoryManager() {} | |
204 | |
205 MemoryManager::Name kind() { return MemoryManager::MarkSweepCompact; } | |
206 const char* name() { return "MarkSweepCompact"; } | |
207 | |
208 }; | |
209 | |
210 class ParNewMemoryManager : public GCMemoryManager { | |
211 private: | |
212 public: | |
213 ParNewMemoryManager() : GCMemoryManager() {} | |
214 | |
215 MemoryManager::Name kind() { return MemoryManager::ParNew; } | |
216 const char* name() { return "ParNew"; } | |
217 | |
218 }; | |
219 | |
220 class CMSMemoryManager : public GCMemoryManager { | |
221 private: | |
222 public: | |
223 CMSMemoryManager() : GCMemoryManager() {} | |
224 | |
225 MemoryManager::Name kind() { return MemoryManager::ConcurrentMarkSweep; } | |
226 const char* name() { return "ConcurrentMarkSweep";} | |
227 | |
228 }; | |
229 | |
230 class PSScavengeMemoryManager : public GCMemoryManager { | |
231 private: | |
232 public: | |
233 PSScavengeMemoryManager() : GCMemoryManager() {} | |
234 | |
235 MemoryManager::Name kind() { return MemoryManager::PSScavenge; } | |
236 const char* name() { return "PS Scavenge"; } | |
237 | |
238 }; | |
239 | |
240 class PSMarkSweepMemoryManager : public GCMemoryManager { | |
241 private: | |
242 public: | |
243 PSMarkSweepMemoryManager() : GCMemoryManager() {} | |
244 | |
245 MemoryManager::Name kind() { return MemoryManager::PSMarkSweep; } | |
246 const char* name() { return "PS MarkSweep"; } | |
247 }; | |
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248 |
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249 class G1YoungGenMemoryManager : public GCMemoryManager { |
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250 private: |
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251 public: |
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252 G1YoungGenMemoryManager() : GCMemoryManager() {} |
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253 |
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254 MemoryManager::Name kind() { return MemoryManager::G1YoungGen; } |
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255 const char* name() { return "G1 Young Generation"; } |
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256 }; |
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257 |
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258 class G1OldGenMemoryManager : public GCMemoryManager { |
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259 private: |
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260 public: |
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261 G1OldGenMemoryManager() : GCMemoryManager() {} |
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262 |
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263 MemoryManager::Name kind() { return MemoryManager::G1OldGen; } |
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264 const char* name() { return "G1 Old Generation"; } |
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265 }; |