Mercurial > hg > truffle
annotate src/share/vm/memory/binaryTreeDictionary.hpp @ 6119:a297b0e14605
7172226: HotSpot fails to build with GCC 4.7 because of stricter c++ argument dependent lookup
Summary: Add "using" keyword to import base class functions from FreeList<T> to fix template name lookup in gcc 4.7
Reviewed-by: brutisso, iveresov
author | mgerdin |
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date | Mon, 04 Jun 2012 09:21:53 +0200 |
parents | f69a5d43dc19 |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
6026 | 2 * Copyright (c) 2001, 2012, 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 | |
6026 | 25 #ifndef SHARE_VM_MEMORY_BINARYTREEDICTIONARY_HPP |
26 #define SHARE_VM_MEMORY_BINARYTREEDICTIONARY_HPP | |
1972 | 27 |
6026 | 28 #include "memory/freeBlockDictionary.hpp" |
29 #include "memory/freeList.hpp" | |
1972 | 30 |
0 | 31 /* |
32 * A binary tree based search structure for free blocks. | |
6026 | 33 * This is currently used in the Concurrent Mark&Sweep implementation, but |
34 * will be used for free block management for metadata. | |
0 | 35 */ |
36 | |
37 // A TreeList is a FreeList which can be used to maintain a | |
38 // binary tree of free lists. | |
39 | |
6026 | 40 template <class Chunk> class TreeChunk; |
41 template <class Chunk> class BinaryTreeDictionary; | |
42 template <class Chunk> class AscendTreeCensusClosure; | |
43 template <class Chunk> class DescendTreeCensusClosure; | |
44 template <class Chunk> class DescendTreeSearchClosure; | |
0 | 45 |
6026 | 46 template <class Chunk> |
47 class TreeList: public FreeList<Chunk> { | |
48 friend class TreeChunk<Chunk>; | |
49 friend class BinaryTreeDictionary<Chunk>; | |
50 friend class AscendTreeCensusClosure<Chunk>; | |
51 friend class DescendTreeCensusClosure<Chunk>; | |
52 friend class DescendTreeSearchClosure<Chunk>; | |
53 | |
54 TreeList<Chunk>* _parent; | |
55 TreeList<Chunk>* _left; | |
56 TreeList<Chunk>* _right; | |
0 | 57 |
58 protected: | |
6026 | 59 TreeList<Chunk>* parent() const { return _parent; } |
60 TreeList<Chunk>* left() const { return _left; } | |
61 TreeList<Chunk>* right() const { return _right; } | |
62 | |
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63 // Explicitly import these names into our namespace to fix name lookup with templates |
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64 using FreeList<Chunk>::head; |
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65 using FreeList<Chunk>::set_head; |
6026 | 66 |
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67 using FreeList<Chunk>::tail; |
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68 using FreeList<Chunk>::set_tail; |
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69 using FreeList<Chunk>::link_tail; |
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70 |
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71 using FreeList<Chunk>::increment_count; |
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72 NOT_PRODUCT(using FreeList<Chunk>::increment_returned_bytes_by;) |
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73 using FreeList<Chunk>::verify_chunk_in_free_list; |
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74 using FreeList<Chunk>::size; |
0 | 75 |
76 // Accessors for links in tree. | |
77 | |
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78 void set_left(TreeList<Chunk>* tl) { |
0 | 79 _left = tl; |
80 if (tl != NULL) | |
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81 tl->set_parent(this); |
0 | 82 } |
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83 void set_right(TreeList<Chunk>* tl) { |
0 | 84 _right = tl; |
85 if (tl != NULL) | |
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86 tl->set_parent(this); |
0 | 87 } |
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88 void set_parent(TreeList<Chunk>* tl) { _parent = tl; } |
0 | 89 |
90 void clearLeft() { _left = NULL; } | |
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91 void clear_right() { _right = NULL; } |
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92 void clear_parent() { _parent = NULL; } |
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93 void initialize() { clearLeft(); clear_right(), clear_parent(); } |
0 | 94 |
95 // For constructing a TreeList from a Tree chunk or | |
96 // address and size. | |
6026 | 97 static TreeList<Chunk>* as_TreeList(TreeChunk<Chunk>* tc); |
98 static TreeList<Chunk>* as_TreeList(HeapWord* addr, size_t size); | |
0 | 99 |
100 // Returns the head of the free list as a pointer to a TreeChunk. | |
6026 | 101 TreeChunk<Chunk>* head_as_TreeChunk(); |
0 | 102 |
103 // Returns the first available chunk in the free list as a pointer | |
104 // to a TreeChunk. | |
6026 | 105 TreeChunk<Chunk>* first_available(); |
0 | 106 |
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107 // Returns the block with the largest heap address amongst |
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108 // those in the list for this size; potentially slow and expensive, |
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109 // use with caution! |
6026 | 110 TreeChunk<Chunk>* largest_address(); |
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111 |
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112 // remove_chunk_replace_if_needed() removes the given "tc" from the TreeList. |
0 | 113 // If "tc" is the first chunk in the list, it is also the |
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114 // TreeList that is the node in the tree. remove_chunk_replace_if_needed() |
0 | 115 // returns the possibly replaced TreeList* for the node in |
116 // the tree. It also updates the parent of the original | |
117 // node to point to the new node. | |
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118 TreeList<Chunk>* remove_chunk_replace_if_needed(TreeChunk<Chunk>* tc); |
0 | 119 // See FreeList. |
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120 void return_chunk_at_head(TreeChunk<Chunk>* tc); |
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121 void return_chunk_at_tail(TreeChunk<Chunk>* tc); |
0 | 122 }; |
123 | |
6026 | 124 // A TreeChunk is a subclass of a Chunk that additionally |
0 | 125 // maintains a pointer to the free list on which it is currently |
126 // linked. | |
127 // A TreeChunk is also used as a node in the binary tree. This | |
128 // allows the binary tree to be maintained without any additional | |
129 // storage (the free chunks are used). In a binary tree the first | |
130 // chunk in the free list is also the tree node. Note that the | |
131 // TreeChunk has an embedded TreeList for this purpose. Because | |
132 // the first chunk in the list is distinguished in this fashion | |
133 // (also is the node in the tree), it is the last chunk to be found | |
134 // on the free list for a node in the tree and is only removed if | |
135 // it is the last chunk on the free list. | |
136 | |
6026 | 137 template <class Chunk> |
138 class TreeChunk : public Chunk { | |
139 friend class TreeList<Chunk>; | |
140 TreeList<Chunk>* _list; | |
141 TreeList<Chunk> _embedded_list; // if non-null, this chunk is on _list | |
0 | 142 protected: |
6026 | 143 TreeList<Chunk>* embedded_list() const { return (TreeList<Chunk>*) &_embedded_list; } |
144 void set_embedded_list(TreeList<Chunk>* v) { _embedded_list = *v; } | |
0 | 145 public: |
6026 | 146 TreeList<Chunk>* list() { return _list; } |
147 void set_list(TreeList<Chunk>* v) { _list = v; } | |
148 static TreeChunk<Chunk>* as_TreeChunk(Chunk* fc); | |
0 | 149 // Initialize fields in a TreeChunk that should be |
150 // initialized when the TreeChunk is being added to | |
151 // a free list in the tree. | |
152 void initialize() { embedded_list()->initialize(); } | |
153 | |
6026 | 154 Chunk* next() const { return Chunk::next(); } |
155 Chunk* prev() const { return Chunk::prev(); } | |
156 size_t size() const volatile { return Chunk::size(); } | |
157 | |
0 | 158 // debugging |
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159 void verify_tree_chunk_list() const; |
0 | 160 }; |
161 | |
162 | |
6026 | 163 template <class Chunk> |
164 class BinaryTreeDictionary: public FreeBlockDictionary<Chunk> { | |
152
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165 friend class VMStructs; |
0 | 166 bool _splay; |
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167 size_t _total_size; |
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168 size_t _total_free_blocks; |
6026 | 169 TreeList<Chunk>* _root; |
170 bool _adaptive_freelists; | |
0 | 171 |
172 // private accessors | |
173 bool splay() const { return _splay; } | |
174 void set_splay(bool v) { _splay = v; } | |
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175 void set_total_size(size_t v) { _total_size = v; } |
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176 virtual void inc_total_size(size_t v); |
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177 virtual void dec_total_size(size_t v); |
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178 size_t total_free_blocks() const { return _total_free_blocks; } |
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179 void set_total_free_blocks(size_t v) { _total_free_blocks = v; } |
6026 | 180 TreeList<Chunk>* root() const { return _root; } |
181 void set_root(TreeList<Chunk>* v) { _root = v; } | |
182 bool adaptive_freelists() { return _adaptive_freelists; } | |
183 | |
184 // This field is added and can be set to point to the | |
185 // the Mutex used to synchronize access to the | |
186 // dictionary so that assertion checking can be done. | |
187 // For example it is set to point to _parDictionaryAllocLock. | |
188 NOT_PRODUCT(Mutex* _lock;) | |
0 | 189 |
190 // Remove a chunk of size "size" or larger from the tree and | |
191 // return it. If the chunk | |
192 // is the last chunk of that size, remove the node for that size | |
193 // from the tree. | |
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194 TreeChunk<Chunk>* get_chunk_from_tree(size_t size, enum FreeBlockDictionary<Chunk>::Dither dither, bool splay); |
0 | 195 // Return a list of the specified size or NULL from the tree. |
196 // The list is not removed from the tree. | |
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197 TreeList<Chunk>* find_list (size_t size) const; |
0 | 198 // Remove this chunk from the tree. If the removal results |
199 // in an empty list in the tree, remove the empty list. | |
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200 TreeChunk<Chunk>* remove_chunk_from_tree(TreeChunk<Chunk>* tc); |
0 | 201 // Remove the node in the trees starting at tl that has the |
202 // minimum value and return it. Repair the tree as needed. | |
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203 TreeList<Chunk>* remove_tree_minimum(TreeList<Chunk>* tl); |
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204 void semi_splay_step(TreeList<Chunk>* tl); |
0 | 205 // Add this free chunk to the tree. |
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206 void insert_chunk_in_tree(Chunk* freeChunk); |
0 | 207 public: |
6026 | 208 |
209 static const size_t min_tree_chunk_size = sizeof(TreeChunk<Chunk>)/HeapWordSize; | |
210 | |
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211 void verify_tree() const; |
0 | 212 // verify that the given chunk is in the tree. |
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213 bool verify_chunk_in_free_list(Chunk* tc) const; |
0 | 214 private: |
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215 void verify_tree_helper(TreeList<Chunk>* tl) const; |
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216 static size_t verify_prev_free_ptrs(TreeList<Chunk>* tl); |
0 | 217 |
218 // Returns the total number of chunks in the list. | |
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219 size_t total_list_length(TreeList<Chunk>* tl) const; |
0 | 220 // Returns the total number of words in the chunks in the tree |
221 // starting at "tl". | |
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222 size_t total_size_in_tree(TreeList<Chunk>* tl) const; |
0 | 223 // Returns the sum of the square of the size of each block |
224 // in the tree starting at "tl". | |
6026 | 225 double sum_of_squared_block_sizes(TreeList<Chunk>* const tl) const; |
0 | 226 // Returns the total number of free blocks in the tree starting |
227 // at "tl". | |
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228 size_t total_free_blocks_in_tree(TreeList<Chunk>* tl) const; |
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229 size_t num_free_blocks() const; |
0 | 230 size_t treeHeight() const; |
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231 size_t tree_height_helper(TreeList<Chunk>* tl) const; |
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232 size_t total_nodes_in_tree(TreeList<Chunk>* tl) const; |
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233 size_t total_nodes_helper(TreeList<Chunk>* tl) const; |
0 | 234 |
235 public: | |
236 // Constructor | |
6026 | 237 BinaryTreeDictionary(bool adaptive_freelists, bool splay = false); |
238 BinaryTreeDictionary(MemRegion mr, bool adaptive_freelists, bool splay = false); | |
239 | |
240 // Public accessors | |
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241 size_t total_size() const { return _total_size; } |
0 | 242 |
243 // Reset the dictionary to the initial conditions with | |
244 // a single free chunk. | |
245 void reset(MemRegion mr); | |
246 void reset(HeapWord* addr, size_t size); | |
247 // Reset the dictionary to be empty. | |
248 void reset(); | |
249 | |
250 // Return a chunk of size "size" or greater from | |
251 // the tree. | |
252 // want a better dynamic splay strategy for the future. | |
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253 Chunk* get_chunk(size_t size, enum FreeBlockDictionary<Chunk>::Dither dither) { |
6026 | 254 FreeBlockDictionary<Chunk>::verify_par_locked(); |
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255 Chunk* res = get_chunk_from_tree(size, dither, splay()); |
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256 assert(res == NULL || res->is_free(), |
0 | 257 "Should be returning a free chunk"); |
258 return res; | |
259 } | |
260 | |
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261 void return_chunk(Chunk* chunk) { |
6026 | 262 FreeBlockDictionary<Chunk>::verify_par_locked(); |
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263 insert_chunk_in_tree(chunk); |
0 | 264 } |
265 | |
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266 void remove_chunk(Chunk* chunk) { |
6026 | 267 FreeBlockDictionary<Chunk>::verify_par_locked(); |
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268 remove_chunk_from_tree((TreeChunk<Chunk>*)chunk); |
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269 assert(chunk->is_free(), "Should still be a free chunk"); |
0 | 270 } |
271 | |
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272 size_t max_chunk_size() const; |
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273 size_t total_chunk_size(debug_only(const Mutex* lock)) const { |
0 | 274 debug_only( |
275 if (lock != NULL && lock->owned_by_self()) { | |
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276 assert(total_size_in_tree(root()) == total_size(), |
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277 "_total_size inconsistency"); |
0 | 278 } |
279 ) | |
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280 return total_size(); |
0 | 281 } |
282 | |
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283 size_t min_size() const { |
6026 | 284 return min_tree_chunk_size; |
0 | 285 } |
286 | |
287 double sum_of_squared_block_sizes() const { | |
288 return sum_of_squared_block_sizes(root()); | |
289 } | |
290 | |
6026 | 291 Chunk* find_chunk_ends_at(HeapWord* target) const; |
0 | 292 |
293 // Find the list with size "size" in the binary tree and update | |
294 // the statistics in the list according to "split" (chunk was | |
295 // split or coalesce) and "birth" (chunk was added or removed). | |
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296 void dict_census_udpate(size_t size, bool split, bool birth); |
0 | 297 // Return true if the dictionary is overpopulated (more chunks of |
298 // this size than desired) for size "size". | |
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299 bool coal_dict_over_populated(size_t size); |
0 | 300 // Methods called at the beginning of a sweep to prepare the |
301 // statistics for the sweep. | |
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302 void begin_sweep_dict_census(double coalSurplusPercent, |
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303 float inter_sweep_current, |
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304 float inter_sweep_estimate, |
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305 float intra_sweep_estimate); |
0 | 306 // Methods called after the end of a sweep to modify the |
307 // statistics for the sweep. | |
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308 void end_sweep_dict_census(double splitSurplusPercent); |
0 | 309 // Return the largest free chunk in the tree. |
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310 Chunk* find_largest_dict() const; |
0 | 311 // Accessors for statistics |
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312 void set_tree_surplus(double splitSurplusPercent); |
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313 void set_tree_hints(void); |
0 | 314 // Reset statistics for all the lists in the tree. |
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315 void clear_tree_census(void); |
0 | 316 // Print the statistcis for all the lists in the tree. Also may |
317 // print out summaries. | |
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318 void print_dict_census(void) const; |
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319 void print_free_lists(outputStream* st) const; |
0 | 320 |
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321 // For debugging. Returns the sum of the _returned_bytes for |
0 | 322 // all lists in the tree. |
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323 size_t sum_dict_returned_bytes() PRODUCT_RETURN0; |
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324 // Sets the _returned_bytes for all the lists in the tree to zero. |
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325 void initialize_dict_returned_bytes() PRODUCT_RETURN; |
0 | 326 // For debugging. Return the total number of chunks in the dictionary. |
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327 size_t total_count() PRODUCT_RETURN0; |
0 | 328 |
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329 void report_statistics() const; |
0 | 330 |
331 void verify() const; | |
332 }; | |
1972 | 333 |
6026 | 334 #endif // SHARE_VM_MEMORY_BINARYTREEDICTIONARY_HPP |