Mercurial > hg > truffle
annotate src/share/vm/services/memoryPool.hpp @ 1604:b918d354830a
6960865: ldc of unloaded class throws an assert in ciTypeFlow
Summary: Support java_mirror for unloaded klasses, arrays as well as instances. Simplify ciTypeFlow by removing unused path.
Reviewed-by: kvn
author | jrose |
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date | Sat, 12 Jun 2010 22:53:43 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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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 pool represents the memory area that the VM manages. | |
26 // The Java virtual machine has at least one memory pool | |
27 // and it may create or remove memory pools during execution. | |
28 // A memory pool can belong to the heap or the non-heap memory. | |
29 // A Java virtual machine may also have memory pools belonging to | |
30 // both heap and non-heap memory. | |
31 | |
32 // Forward declaration | |
33 class MemoryManager; | |
34 class SensorInfo; | |
35 class Generation; | |
36 class DefNewGeneration; | |
37 class PSPermGen; | |
38 class PermGen; | |
39 class ThresholdSupport; | |
40 | |
41 class MemoryPool : public CHeapObj { | |
42 friend class MemoryManager; | |
43 public: | |
44 enum PoolType { | |
45 Heap = 1, | |
46 NonHeap = 2 | |
47 }; | |
48 | |
49 private: | |
50 enum { | |
51 max_num_managers = 5 | |
52 }; | |
53 | |
54 // We could make some of the following as performance counters | |
55 // for external monitoring. | |
56 const char* _name; | |
57 PoolType _type; | |
58 size_t _initial_size; | |
59 size_t _max_size; | |
60 bool _available_for_allocation; // Default is true | |
61 MemoryManager* _managers[max_num_managers]; | |
62 int _num_managers; | |
63 MemoryUsage _peak_usage; // Peak memory usage | |
64 MemoryUsage _after_gc_usage; // After GC memory usage | |
65 | |
66 ThresholdSupport* _usage_threshold; | |
67 ThresholdSupport* _gc_usage_threshold; | |
68 | |
69 SensorInfo* _usage_sensor; | |
70 SensorInfo* _gc_usage_sensor; | |
71 | |
72 volatile instanceOop _memory_pool_obj; | |
73 | |
74 void add_manager(MemoryManager* mgr); | |
75 | |
76 public: | |
77 MemoryPool(const char* name, | |
78 PoolType type, | |
79 size_t init_size, | |
80 size_t max_size, | |
81 bool support_usage_threshold, | |
82 bool support_gc_threshold); | |
83 | |
84 const char* name() { return _name; } | |
85 bool is_heap() { return _type == Heap; } | |
86 bool is_non_heap() { return _type == NonHeap; } | |
87 size_t initial_size() const { return _initial_size; } | |
88 int num_memory_managers() const { return _num_managers; } | |
89 // max size could be changed | |
90 virtual size_t max_size() const { return _max_size; } | |
91 | |
92 bool is_pool(instanceHandle pool) { return (pool() == _memory_pool_obj); } | |
93 | |
94 bool available_for_allocation() { return _available_for_allocation; } | |
95 bool set_available_for_allocation(bool value) { | |
96 bool prev = _available_for_allocation; | |
97 _available_for_allocation = value; | |
98 return prev; | |
99 } | |
100 | |
101 MemoryManager* get_memory_manager(int index) { | |
102 assert(index >= 0 && index < _num_managers, "Invalid index"); | |
103 return _managers[index]; | |
104 } | |
105 | |
106 // Records current memory usage if it's a peak usage | |
107 void record_peak_memory_usage(); | |
108 | |
109 MemoryUsage get_peak_memory_usage() { | |
110 // check current memory usage first and then return peak usage | |
111 record_peak_memory_usage(); | |
112 return _peak_usage; | |
113 } | |
114 void reset_peak_memory_usage() { | |
115 _peak_usage = get_memory_usage(); | |
116 } | |
117 | |
118 ThresholdSupport* usage_threshold() { return _usage_threshold; } | |
119 ThresholdSupport* gc_usage_threshold() { return _gc_usage_threshold; } | |
120 | |
121 SensorInfo* usage_sensor() { return _usage_sensor; } | |
122 SensorInfo* gc_usage_sensor() { return _gc_usage_sensor; } | |
123 | |
124 void set_usage_sensor_obj(instanceHandle s); | |
125 void set_gc_usage_sensor_obj(instanceHandle s); | |
126 void set_last_collection_usage(MemoryUsage u) { _after_gc_usage = u; } | |
127 | |
128 virtual instanceOop get_memory_pool_instance(TRAPS); | |
129 virtual MemoryUsage get_memory_usage() = 0; | |
130 virtual size_t used_in_bytes() = 0; | |
131 virtual bool is_collected_pool() { return false; } | |
132 virtual MemoryUsage get_last_collection_usage() { return _after_gc_usage; } | |
133 | |
134 // GC support | |
135 void oops_do(OopClosure* f); | |
136 }; | |
137 | |
138 class CollectedMemoryPool : public MemoryPool { | |
139 public: | |
140 CollectedMemoryPool(const char* name, PoolType type, size_t init_size, size_t max_size, bool support_usage_threshold) : | |
141 MemoryPool(name, type, init_size, max_size, support_usage_threshold, true) {}; | |
142 bool is_collected_pool() { return true; } | |
143 }; | |
144 | |
145 class ContiguousSpacePool : public CollectedMemoryPool { | |
146 private: | |
147 ContiguousSpace* _space; | |
148 | |
149 public: | |
150 ContiguousSpacePool(ContiguousSpace* space, const char* name, PoolType type, size_t max_size, bool support_usage_threshold); | |
151 | |
152 ContiguousSpace* space() { return _space; } | |
153 MemoryUsage get_memory_usage(); | |
154 size_t used_in_bytes() { return space()->used(); } | |
155 }; | |
156 | |
157 class SurvivorContiguousSpacePool : public CollectedMemoryPool { | |
158 private: | |
159 DefNewGeneration* _gen; | |
160 | |
161 public: | |
162 SurvivorContiguousSpacePool(DefNewGeneration* gen, | |
163 const char* name, | |
164 PoolType type, | |
165 size_t max_size, | |
166 bool support_usage_threshold); | |
167 | |
168 MemoryUsage get_memory_usage(); | |
169 | |
170 size_t used_in_bytes() { | |
171 return _gen->from()->used(); | |
172 } | |
173 size_t committed_in_bytes() { | |
174 return _gen->from()->capacity(); | |
175 } | |
176 }; | |
177 | |
178 #ifndef SERIALGC | |
179 class CompactibleFreeListSpacePool : public CollectedMemoryPool { | |
180 private: | |
181 CompactibleFreeListSpace* _space; | |
182 public: | |
183 CompactibleFreeListSpacePool(CompactibleFreeListSpace* space, | |
184 const char* name, | |
185 PoolType type, | |
186 size_t max_size, | |
187 bool support_usage_threshold); | |
188 | |
189 MemoryUsage get_memory_usage(); | |
190 size_t used_in_bytes() { return _space->used(); } | |
191 }; | |
192 #endif // SERIALGC | |
193 | |
194 | |
195 class GenerationPool : public CollectedMemoryPool { | |
196 private: | |
197 Generation* _gen; | |
198 public: | |
199 GenerationPool(Generation* gen, const char* name, PoolType type, bool support_usage_threshold); | |
200 | |
201 MemoryUsage get_memory_usage(); | |
202 size_t used_in_bytes() { return _gen->used(); } | |
203 }; | |
204 | |
205 class CodeHeapPool: public MemoryPool { | |
206 private: | |
207 CodeHeap* _codeHeap; | |
208 public: | |
209 CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold); | |
210 MemoryUsage get_memory_usage(); | |
211 size_t used_in_bytes() { return _codeHeap->allocated_capacity(); } | |
212 }; |