Mercurial > hg > truffle
annotate src/share/vm/services/memSnapshot.hpp @ 7811:94ea9a864fc6
Remove usages of VmIds.toString.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Mon, 18 Feb 2013 19:08:52 -0800 |
parents | ecd24264898b |
children | b80cc96882f7 |
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_SNAPSHOT_HPP | |
26 #define SHARE_VM_SERVICES_MEM_SNAPSHOT_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "runtime/mutex.hpp" | |
30 #include "runtime/mutexLocker.hpp" | |
31 #include "services/memBaseline.hpp" | |
32 #include "services/memPtrArray.hpp" | |
33 | |
34 // Snapshot pointer array iterator | |
35 | |
36 // The pointer array contains malloc-ed pointers | |
37 class MemPointerIterator : public MemPointerArrayIteratorImpl { | |
38 public: | |
39 MemPointerIterator(MemPointerArray* arr): | |
40 MemPointerArrayIteratorImpl(arr) { | |
41 assert(arr != NULL, "null array"); | |
42 } | |
43 | |
44 #ifdef ASSERT | |
45 virtual bool is_dup_pointer(const MemPointer* ptr1, | |
46 const MemPointer* ptr2) const { | |
47 MemPointerRecord* p1 = (MemPointerRecord*)ptr1; | |
48 MemPointerRecord* p2 = (MemPointerRecord*)ptr2; | |
49 | |
50 if (p1->addr() != p2->addr()) return false; | |
51 if ((p1->flags() & MemPointerRecord::tag_masks) != | |
52 (p2->flags() & MemPointerRecord::tag_masks)) { | |
53 return false; | |
54 } | |
55 // we do see multiple commit/uncommit on the same memory, it is ok | |
56 return (p1->flags() & MemPointerRecord::tag_masks) == MemPointerRecord::tag_alloc || | |
57 (p1->flags() & MemPointerRecord::tag_masks) == MemPointerRecord::tag_release; | |
58 } | |
59 | |
60 virtual bool insert(MemPointer* ptr) { | |
61 if (_pos > 0) { | |
62 MemPointer* p1 = (MemPointer*)ptr; | |
63 MemPointer* p2 = (MemPointer*)_array->at(_pos - 1); | |
64 assert(!is_dup_pointer(p1, p2), | |
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65 err_msg("duplicated pointer, flag = [%x]", (unsigned int)((MemPointerRecord*)p1)->flags())); |
6197 | 66 } |
67 if (_pos < _array->length() -1) { | |
68 MemPointer* p1 = (MemPointer*)ptr; | |
69 MemPointer* p2 = (MemPointer*)_array->at(_pos + 1); | |
70 assert(!is_dup_pointer(p1, p2), | |
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71 err_msg("duplicated pointer, flag = [%x]", (unsigned int)((MemPointerRecord*)p1)->flags())); |
6197 | 72 } |
73 return _array->insert_at(ptr, _pos); | |
74 } | |
75 | |
76 virtual bool insert_after(MemPointer* ptr) { | |
77 if (_pos > 0) { | |
78 MemPointer* p1 = (MemPointer*)ptr; | |
79 MemPointer* p2 = (MemPointer*)_array->at(_pos - 1); | |
80 assert(!is_dup_pointer(p1, p2), | |
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81 err_msg("duplicated pointer, flag = [%x]", (unsigned int)((MemPointerRecord*)p1)->flags())); |
6197 | 82 } |
83 if (_pos < _array->length() - 1) { | |
84 MemPointer* p1 = (MemPointer*)ptr; | |
85 MemPointer* p2 = (MemPointer*)_array->at(_pos + 1); | |
86 | |
87 assert(!is_dup_pointer(p1, p2), | |
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88 err_msg("duplicated pointer, flag = [%x]", (unsigned int)((MemPointerRecord*)p1)->flags())); |
6197 | 89 } |
90 if (_array->insert_at(ptr, _pos + 1)) { | |
91 _pos ++; | |
92 return true; | |
93 } | |
94 return false; | |
95 } | |
96 #endif | |
97 | |
98 virtual MemPointer* locate(address addr) { | |
99 MemPointer* cur = current(); | |
100 while (cur != NULL && cur->addr() < addr) { | |
101 cur = next(); | |
102 } | |
103 return cur; | |
104 } | |
105 }; | |
106 | |
107 class VMMemPointerIterator : public MemPointerIterator { | |
108 public: | |
109 VMMemPointerIterator(MemPointerArray* arr): | |
110 MemPointerIterator(arr) { | |
111 } | |
112 | |
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113 // locate an existing reserved memory region that contains specified address, |
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114 // or the reserved region just above this address, where the incoming |
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115 // reserved region should be inserted. |
6197 | 116 virtual MemPointer* locate(address addr) { |
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117 reset(); |
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118 VMMemRegion* reg = (VMMemRegion*)current(); |
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119 while (reg != NULL) { |
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120 if (reg->is_reserved_region()) { |
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121 if (reg->contains_address(addr) || addr < reg->base()) { |
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122 return reg; |
6197 | 123 } |
124 } | |
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125 reg = (VMMemRegion*)next(); |
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126 } |
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127 return NULL; |
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128 } |
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129 |
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130 // following methods update virtual memory in the context |
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131 // of 'current' position, which is properly positioned by |
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132 // callers via locate method. |
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133 bool add_reserved_region(MemPointerRecord* rec); |
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134 bool add_committed_region(MemPointerRecord* rec); |
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135 bool remove_uncommitted_region(MemPointerRecord* rec); |
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136 bool remove_released_region(MemPointerRecord* rec); |
6197 | 137 |
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138 // split a reserved region to create a new memory region with specified base and size |
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139 bool split_reserved_region(VMMemRegion* rgn, address new_rgn_addr, size_t new_rgn_size); |
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140 private: |
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141 bool insert_record(MemPointerRecord* rec); |
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142 bool insert_record_after(MemPointerRecord* rec); |
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143 |
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144 bool insert_reserved_region(MemPointerRecord* rec); |
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145 |
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146 // reset current position |
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147 inline void reset() { _pos = 0; } |
6197 | 148 #ifdef ASSERT |
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149 // check integrity of records on current reserved memory region. |
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150 bool check_reserved_region() { |
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151 VMMemRegion* reserved_region = (VMMemRegion*)current(); |
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152 assert(reserved_region != NULL && reserved_region->is_reserved_region(), |
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153 "Sanity check"); |
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154 // all committed regions that follow current reserved region, should all |
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155 // belong to the reserved region. |
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156 VMMemRegion* next_region = (VMMemRegion*)next(); |
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157 for (; next_region != NULL && next_region->is_committed_region(); |
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158 next_region = (VMMemRegion*)next() ) { |
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159 if(!reserved_region->contains_region(next_region)) { |
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160 return false; |
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161 } |
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162 } |
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163 return true; |
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164 } |
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165 |
6197 | 166 virtual bool is_dup_pointer(const MemPointer* ptr1, |
167 const MemPointer* ptr2) const { | |
168 VMMemRegion* p1 = (VMMemRegion*)ptr1; | |
169 VMMemRegion* p2 = (VMMemRegion*)ptr2; | |
170 | |
171 if (p1->addr() != p2->addr()) return false; | |
172 if ((p1->flags() & MemPointerRecord::tag_masks) != | |
173 (p2->flags() & MemPointerRecord::tag_masks)) { | |
174 return false; | |
175 } | |
176 // we do see multiple commit/uncommit on the same memory, it is ok | |
177 return (p1->flags() & MemPointerRecord::tag_masks) == MemPointerRecord::tag_alloc || | |
178 (p1->flags() & MemPointerRecord::tag_masks) == MemPointerRecord::tag_release; | |
179 } | |
180 #endif | |
181 }; | |
182 | |
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183 class MallocRecordIterator : public MemPointerArrayIterator { |
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184 private: |
6197 | 185 MemPointerArrayIteratorImpl _itr; |
186 | |
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187 |
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188 |
6197 | 189 public: |
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190 MallocRecordIterator(MemPointerArray* arr) : _itr(arr) { |
6197 | 191 } |
192 | |
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193 virtual MemPointer* current() const { |
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194 #ifdef ASSERT |
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195 MemPointer* cur_rec = _itr.current(); |
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196 if (cur_rec != NULL) { |
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197 MemPointer* prev_rec = _itr.peek_prev(); |
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198 MemPointer* next_rec = _itr.peek_next(); |
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199 assert(prev_rec == NULL || prev_rec->addr() < cur_rec->addr(), "Sorting order"); |
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200 assert(next_rec == NULL || next_rec->addr() > cur_rec->addr(), "Sorting order"); |
6197 | 201 } |
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202 #endif |
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203 return _itr.current(); |
6197 | 204 } |
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205 virtual MemPointer* next() { |
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206 MemPointerRecord* next_rec = (MemPointerRecord*)_itr.next(); |
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207 // arena memory record is a special case, which we have to compare |
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208 // sequence number against its associated arena record. |
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209 if (next_rec != NULL && next_rec->is_arena_memory_record()) { |
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210 MemPointerRecord* prev_rec = (MemPointerRecord*)_itr.peek_prev(); |
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211 // if there is an associated arena record, it has to be previous |
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212 // record because of sorting order (by address) - NMT generates a pseudo address |
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213 // for arena's size record by offsetting arena's address, that guarantees |
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214 // the order of arena record and it's size record. |
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215 if (prev_rec != NULL && prev_rec->is_arena_record() && |
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216 next_rec->is_memory_record_of_arena(prev_rec)) { |
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217 if (prev_rec->seq() > next_rec->seq()) { |
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218 // Skip this arena memory record |
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219 // Two scenarios: |
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220 // - if the arena record is an allocation record, this early |
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221 // size record must be leftover by previous arena, |
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222 // and the last size record should have size = 0. |
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223 // - if the arena record is a deallocation record, this |
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224 // size record should be its cleanup record, which should |
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225 // also have size = 0. In other world, arena alway reset |
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226 // its size before gone (see Arena's destructor) |
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227 assert(next_rec->size() == 0, "size not reset"); |
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228 return _itr.next(); |
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229 } else { |
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230 assert(prev_rec->is_allocation_record(), |
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231 "Arena size record ahead of allocation record"); |
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232 } |
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233 } |
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234 } |
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235 return next_rec; |
6197 | 236 } |
237 | |
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238 MemPointer* peek_next() const { ShouldNotReachHere(); return NULL; } |
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239 MemPointer* peek_prev() const { ShouldNotReachHere(); return NULL; } |
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240 void remove() { ShouldNotReachHere(); } |
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241 bool insert(MemPointer* ptr) { ShouldNotReachHere(); return false; } |
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242 bool insert_after(MemPointer* ptr) { ShouldNotReachHere(); return false; } |
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243 }; |
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244 |
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245 // collapse duplicated records. Eliminating duplicated records here, is much |
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246 // cheaper than during promotion phase. However, it does have limitation - it |
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247 // can only eliminate duplicated records within the generation, there are |
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248 // still chances seeing duplicated records during promotion. |
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249 // We want to use the record with higher sequence number, because it has |
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250 // more accurate callsite pc. |
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251 class VMRecordIterator : public MemPointerArrayIterator { |
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252 private: |
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253 MemPointerArrayIteratorImpl _itr; |
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254 |
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255 public: |
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256 VMRecordIterator(MemPointerArray* arr) : _itr(arr) { |
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257 MemPointerRecord* cur = (MemPointerRecord*)_itr.current(); |
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258 MemPointerRecord* next = (MemPointerRecord*)_itr.peek_next(); |
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259 while (next != NULL) { |
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260 assert(cur != NULL, "Sanity check"); |
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261 assert(((SeqMemPointerRecord*)next)->seq() > ((SeqMemPointerRecord*)cur)->seq(), |
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262 "pre-sort order"); |
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263 |
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264 if (is_duplicated_record(cur, next)) { |
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265 _itr.next(); |
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266 next = (MemPointerRecord*)_itr.peek_next(); |
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267 } else { |
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268 break; |
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269 } |
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270 } |
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271 } |
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272 |
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273 virtual MemPointer* current() const { |
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274 return _itr.current(); |
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275 } |
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276 |
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277 // get next record, but skip the duplicated records |
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278 virtual MemPointer* next() { |
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279 MemPointerRecord* cur = (MemPointerRecord*)_itr.next(); |
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280 MemPointerRecord* next = (MemPointerRecord*)_itr.peek_next(); |
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281 while (next != NULL) { |
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282 assert(cur != NULL, "Sanity check"); |
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283 assert(((SeqMemPointerRecord*)next)->seq() > ((SeqMemPointerRecord*)cur)->seq(), |
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284 "pre-sort order"); |
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285 |
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286 if (is_duplicated_record(cur, next)) { |
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287 _itr.next(); |
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288 cur = next; |
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289 next = (MemPointerRecord*)_itr.peek_next(); |
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290 } else { |
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291 break; |
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292 } |
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293 } |
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294 return cur; |
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295 } |
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296 |
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297 MemPointer* peek_next() const { ShouldNotReachHere(); return NULL; } |
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298 MemPointer* peek_prev() const { ShouldNotReachHere(); return NULL; } |
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299 void remove() { ShouldNotReachHere(); } |
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300 bool insert(MemPointer* ptr) { ShouldNotReachHere(); return false; } |
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301 bool insert_after(MemPointer* ptr) { ShouldNotReachHere(); return false; } |
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302 |
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303 private: |
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304 bool is_duplicated_record(MemPointerRecord* p1, MemPointerRecord* p2) const { |
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305 bool ret = (p1->addr() == p2->addr() && p1->size() == p2->size() && p1->flags() == p2->flags()); |
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306 assert(!(ret && FLAGS_TO_MEMORY_TYPE(p1->flags()) == mtThreadStack), "dup on stack record"); |
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307 return ret; |
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308 } |
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309 }; |
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310 |
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311 class StagingArea : public _ValueObj { |
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312 private: |
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313 MemPointerArray* _malloc_data; |
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314 MemPointerArray* _vm_data; |
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315 |
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316 public: |
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317 StagingArea() : _malloc_data(NULL), _vm_data(NULL) { |
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318 init(); |
6197 | 319 } |
320 | |
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321 ~StagingArea() { |
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322 if (_malloc_data != NULL) delete _malloc_data; |
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323 if (_vm_data != NULL) delete _vm_data; |
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324 } |
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325 |
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326 MallocRecordIterator malloc_record_walker() { |
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327 return MallocRecordIterator(malloc_data()); |
6197 | 328 } |
329 | |
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330 VMRecordIterator virtual_memory_record_walker(); |
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331 |
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332 bool init(); |
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333 void clear() { |
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334 assert(_malloc_data != NULL && _vm_data != NULL, "Just check"); |
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335 _malloc_data->shrink(); |
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336 _malloc_data->clear(); |
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337 _vm_data->clear(); |
6197 | 338 } |
339 | |
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340 inline MemPointerArray* malloc_data() { return _malloc_data; } |
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341 inline MemPointerArray* vm_data() { return _vm_data; } |
6197 | 342 }; |
343 | |
344 class MemBaseline; | |
345 class MemSnapshot : public CHeapObj<mtNMT> { | |
346 private: | |
347 // the following two arrays contain records of all known lived memory blocks | |
348 // live malloc-ed memory pointers | |
349 MemPointerArray* _alloc_ptrs; | |
350 // live virtual memory pointers | |
351 MemPointerArray* _vm_ptrs; | |
352 | |
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353 StagingArea _staging_area; |
6197 | 354 |
355 // the lock to protect this snapshot | |
356 Monitor* _lock; | |
357 | |
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358 // the number of instance classes |
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359 int _number_of_classes; |
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360 |
6197 | 361 NOT_PRODUCT(size_t _untracked_count;) |
362 friend class MemBaseline; | |
363 | |
364 public: | |
365 MemSnapshot(); | |
366 virtual ~MemSnapshot(); | |
367 | |
368 // if we are running out of native memory | |
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369 bool out_of_memory() { |
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370 return (_alloc_ptrs == NULL || |
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371 _staging_area.malloc_data() == NULL || |
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372 _staging_area.vm_data() == NULL || |
6197 | 373 _vm_ptrs == NULL || _lock == NULL || |
374 _alloc_ptrs->out_of_memory() || | |
375 _vm_ptrs->out_of_memory()); | |
376 } | |
377 | |
378 // merge a per-thread memory recorder into staging area | |
379 bool merge(MemRecorder* rec); | |
380 // promote staged data to snapshot | |
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381 bool promote(int number_of_classes); |
6197 | 382 |
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383 int number_of_classes() const { return _number_of_classes; } |
6197 | 384 |
385 void wait(long timeout) { | |
386 assert(_lock != NULL, "Just check"); | |
387 MonitorLockerEx locker(_lock); | |
388 locker.wait(true, timeout); | |
389 } | |
390 | |
391 NOT_PRODUCT(void print_snapshot_stats(outputStream* st);) | |
392 NOT_PRODUCT(void check_staging_data();) | |
393 NOT_PRODUCT(void check_malloc_pointers();) | |
394 NOT_PRODUCT(bool has_allocation_record(address addr);) | |
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395 // dump all virtual memory pointers in snapshot |
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396 DEBUG_ONLY( void dump_all_vm_pointers();) |
6197 | 397 |
398 private: | |
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399 // copy sequenced pointer from src to dest |
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400 void copy_seq_pointer(MemPointerRecord* dest, const MemPointerRecord* src); |
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401 // assign a sequenced pointer to non-sequenced pointer |
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402 void assign_pointer(MemPointerRecord*dest, const MemPointerRecord* src); |
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403 |
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404 bool promote_malloc_records(MemPointerArrayIterator* itr); |
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405 bool promote_virtual_memory_records(MemPointerArrayIterator* itr); |
6197 | 406 }; |
407 | |
408 #endif // SHARE_VM_SERVICES_MEM_SNAPSHOT_HPP |