Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1RegionToSpaceMapper.hpp @ 20417:d35872270666
8057658: Enable G1 FullGC extensions
Summary: Refactored the G1 FullGC code to enable it to be extended.
Reviewed-by: mgerdin, brutisso
| author | sjohanss |
|---|---|
| date | Tue, 09 Sep 2014 00:05:25 +0200 |
| parents | 7b2fc3129653 |
| children | e7d0505c8a30 |
| rev | line source |
|---|---|
| 20337 | 1 /* |
| 2 * Copyright (c) 2014, 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_GC_IMPLEMENTATION_G1_G1REGIONTOSPACEMAPPER_HPP | |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REGIONTOSPACEMAPPER_HPP | |
| 27 | |
| 28 #include "gc_implementation/g1/g1PageBasedVirtualSpace.hpp" | |
|
20339
7b2fc3129653
8055635: Missing include in g1RegionToSpaceMapper.hpp results in unresolved symbol of fastdebug build without precompiled headers
tschatzl
parents:
20337
diff
changeset
|
29 #include "memory/allocation.hpp" |
| 20337 | 30 #include "utilities/debug.hpp" |
| 31 | |
| 32 class G1MappingChangedListener VALUE_OBJ_CLASS_SPEC { | |
| 33 public: | |
| 34 // Fired after commit of the memory, i.e. the memory this listener is registered | |
| 35 // for can be accessed. | |
| 36 virtual void on_commit(uint start_idx, size_t num_regions) = 0; | |
| 37 }; | |
| 38 | |
| 39 // Maps region based commit/uncommit requests to the underlying page sized virtual | |
| 40 // space. | |
| 41 class G1RegionToSpaceMapper : public CHeapObj<mtGC> { | |
| 42 private: | |
| 43 G1MappingChangedListener* _listener; | |
| 44 protected: | |
| 45 // Backing storage. | |
| 46 G1PageBasedVirtualSpace _storage; | |
| 47 size_t _commit_granularity; | |
| 48 size_t _region_granularity; | |
| 49 // Mapping management | |
| 50 BitMap _commit_map; | |
| 51 | |
| 52 G1RegionToSpaceMapper(ReservedSpace rs, size_t commit_granularity, size_t region_granularity, MemoryType type); | |
| 53 | |
| 54 void fire_on_commit(uint start_idx, size_t num_regions); | |
| 55 public: | |
| 56 MemRegion reserved() { return _storage.reserved(); } | |
| 57 | |
| 58 void set_mapping_changed_listener(G1MappingChangedListener* listener) { _listener = listener; } | |
| 59 | |
| 60 virtual ~G1RegionToSpaceMapper() { | |
| 61 _commit_map.resize(0, /* in_resource_area */ false); | |
| 62 } | |
| 63 | |
| 64 bool is_committed(uintptr_t idx) const { | |
| 65 return _commit_map.at(idx); | |
| 66 } | |
| 67 | |
| 68 virtual void commit_regions(uintptr_t start_idx, size_t num_regions = 1) = 0; | |
| 69 virtual void uncommit_regions(uintptr_t start_idx, size_t num_regions = 1) = 0; | |
| 70 | |
| 71 // Creates an appropriate G1RegionToSpaceMapper for the given parameters. | |
| 72 // The byte_translation_factor defines how many bytes in a region correspond to | |
| 73 // a single byte in the data structure this mapper is for. | |
| 74 // Eg. in the card table, this value corresponds to the size a single card | |
| 75 // table entry corresponds to. | |
| 76 static G1RegionToSpaceMapper* create_mapper(ReservedSpace rs, | |
| 77 size_t os_commit_granularity, | |
| 78 size_t region_granularity, | |
| 79 size_t byte_translation_factor, | |
| 80 MemoryType type); | |
| 81 }; | |
| 82 | |
| 83 #endif /* SHARE_VM_GC_IMPLEMENTATION_G1_G1REGIONTOSPACEMAPPER_HPP */ |