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1 /*
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2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // Forward declaration
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26 class MemoryPool;
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27 class MemoryManager;
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28 class GCMemoryManager;
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29 class CollectedHeap;
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30 class Generation;
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31 class DefNewGeneration;
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32 class PSYoungGen;
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33 class PSOldGen;
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34 class PSPermGen;
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35 class CodeHeap;
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36 class ContiguousSpace;
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37 class CompactibleFreeListSpace;
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38 class PermanentGenerationSpec;
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39 class GenCollectedHeap;
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40 class ParallelScavengeHeap;
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41 class CompactingPermGenGen;
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42 class CMSPermGenGen;
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43
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44 // VM Monitoring and Management Support
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45
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46 class MemoryService : public AllStatic {
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47 private:
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48 enum {
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49 init_pools_list_size = 10,
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50 init_managers_list_size = 5
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51 };
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52
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53 // index for minor and major generations
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54 enum {
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55 minor = 0,
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56 major = 1,
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57 n_gens = 2
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58 };
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59
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60 static GrowableArray<MemoryPool*>* _pools_list;
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61 static GrowableArray<MemoryManager*>* _managers_list;
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62
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63 // memory managers for minor and major GC statistics
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64 static GCMemoryManager* _major_gc_manager;
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65 static GCMemoryManager* _minor_gc_manager;
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66
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67 // Code heap memory pool
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68 static MemoryPool* _code_heap_pool;
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69
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70 static void add_generation_memory_pool(Generation* gen,
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71 MemoryManager* major_mgr,
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72 MemoryManager* minor_mgr);
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73 static void add_generation_memory_pool(Generation* gen,
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74 MemoryManager* major_mgr) {
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75 add_generation_memory_pool(gen, major_mgr, NULL);
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76 }
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77
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78 static void add_compact_perm_gen_memory_pool(CompactingPermGenGen* perm_gen,
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79 MemoryManager* mgr);
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80 static void add_cms_perm_gen_memory_pool(CMSPermGenGen* perm_gen,
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81 MemoryManager* mgr);
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82
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83 static void add_psYoung_memory_pool(PSYoungGen* gen,
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84 MemoryManager* major_mgr,
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85 MemoryManager* minor_mgr);
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86 static void add_psOld_memory_pool(PSOldGen* gen,
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87 MemoryManager* mgr);
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88 static void add_psPerm_memory_pool(PSPermGen* perm,
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89 MemoryManager* mgr);
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90
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91
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92 static MemoryPool* add_space(ContiguousSpace* space,
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93 const char* name,
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94 bool is_heap,
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95 size_t max_size,
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96 bool support_usage_threshold);
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97 static MemoryPool* add_survivor_spaces(DefNewGeneration* gen,
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98 const char* name,
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99 bool is_heap,
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100 size_t max_size,
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101 bool support_usage_threshold);
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102 static MemoryPool* add_gen(Generation* gen,
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103 const char* name,
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104 bool is_heap,
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105 bool support_usage_threshold);
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106 static MemoryPool* add_cms_space(CompactibleFreeListSpace* space,
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107 const char* name,
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108 bool is_heap,
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109 size_t max_size,
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110 bool support_usage_threshold);
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111
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112 static void add_gen_collected_heap_info(GenCollectedHeap* heap);
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113 static void add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap);
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114
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115 public:
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116 static void set_universe_heap(CollectedHeap* heap);
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117 static void add_code_heap_memory_pool(CodeHeap* heap);
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118
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119 static MemoryPool* get_memory_pool(instanceHandle pool);
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120 static MemoryManager* get_memory_manager(instanceHandle mgr);
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121
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122 static const int num_memory_pools() {
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123 return _pools_list->length();
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124 }
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125 static const int num_memory_managers() {
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126 return _managers_list->length();
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127 }
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128
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129 static MemoryPool* get_memory_pool(int index) {
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130 return _pools_list->at(index);
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131 }
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132
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133 static MemoryManager* get_memory_manager(int index) {
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134 return _managers_list->at(index);
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135 }
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136
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137 static void track_memory_usage();
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138 static void track_code_cache_memory_usage() {
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139 track_memory_pool_usage(_code_heap_pool);
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140 }
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141 static void track_memory_pool_usage(MemoryPool* pool);
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142
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143 static void gc_begin(bool fullGC);
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144 static void gc_end(bool fullGC);
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145
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146 static void oops_do(OopClosure* f);
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147
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148 static bool get_verbose() { return PrintGC; }
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149 static bool set_verbose(bool verbose);
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150
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151 // Create an instance of java/lang/management/MemoryUsage
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152 static Handle create_MemoryUsage_obj(MemoryUsage usage, TRAPS);
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153 };
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154
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155 class TraceMemoryManagerStats : public StackObj {
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156 private:
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157 bool _fullGC;
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158 public:
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159 TraceMemoryManagerStats(bool fullGC);
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160 TraceMemoryManagerStats(Generation::Name kind);
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161 ~TraceMemoryManagerStats();
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162 };
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