1 /* 2 * Copyright (c) 2001, 2004, 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 // The specification of a generation. This class also encapsulates 26 // some generation-specific behavior. This is done here rather than as a 27 // virtual function of Generation because these methods are needed in 28 // initialization of the Generations. 29 class GenerationSpec : public CHeapObj { 30 friend class VMStructs; 31 private: 32 Generation::Name _name; 33 size_t _init_size; 34 size_t _max_size; 35 36 public: 37 GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) { 38 _name = name; 39 _init_size = init_size; 40 _max_size = max_size; 41 } 42 43 Generation* init(ReservedSpace rs, int level, GenRemSet* remset); 44 45 // Accessors 46 Generation::Name name() const { return _name; } 47 size_t init_size() const { return _init_size; } 48 void set_init_size(size_t size) { _init_size = size; } 49 size_t max_size() const { return _max_size; } 50 void set_max_size(size_t size) { _max_size = size; } 51 52 // Alignment 53 void align(size_t alignment) { 54 set_init_size(align_size_up(init_size(), alignment)); 55 set_max_size(align_size_up(max_size(), alignment)); 56 } 57 58 // Return the number of regions contained in the generation which 59 // might need to be independently covered by a remembered set. 60 virtual int n_covered_regions() const { return 1; } 61 }; 62 63 typedef GenerationSpec* GenerationSpecPtr; 64 65 // The specification of a permanent generation. This class is very 66 // similar to GenerationSpec in use. Due to PermGen's not being a 67 // true Generation, we cannot combine the spec classes either. 68 class PermanentGenerationSpec : public CHeapObj { 69 friend class VMStructs; 70 private: 71 PermGen::Name _name; 72 size_t _init_size; 73 size_t _max_size; 74 size_t _read_only_size; 75 size_t _read_write_size; 76 size_t _misc_data_size; 77 size_t _misc_code_size; 78 bool _enable_shared_spaces; 79 80 enum { 81 _n_spaces = 2 82 }; 83 84 public: 85 PermanentGenerationSpec(PermGen::Name name, size_t init_size, 86 size_t max_size, size_t read_only_size, 87 size_t read_write_size, size_t misc_data_size, 88 size_t misc_code_size); 89 90 PermGen* init(ReservedSpace rs, size_t init_size, GenRemSet* remset); 91 92 void disable_sharing() { 93 _enable_shared_spaces = false; 94 _read_only_size = 0; 95 _read_write_size = 0; 96 _misc_data_size = 0; 97 _misc_code_size = 0; 98 } 99 100 // Accessors 101 PermGen::Name name() const { return _name; } 102 size_t init_size() const { return _init_size; } 103 void set_init_size(size_t size) { _init_size = size; } 104 105 // Max size for user DOES NOT include shared spaces. 106 // Max size for space allocation DOES include shared spaces. 107 size_t max_size() const { 108 return _max_size + _read_only_size + _read_write_size; 109 } 110 111 // Need one covered region for the main space, and one for the shared 112 // spaces (together). 113 int n_covered_regions() const { return 2; } 114 115 void align(size_t alignment); 116 117 size_t read_only_size() const { return _read_only_size; } 118 size_t read_write_size() const { return _read_write_size; } 119 size_t misc_data_size() const { return _misc_data_size; } 120 size_t misc_code_size() const { return _misc_code_size; } 121 bool enable_shared_spaces() const { return _enable_shared_spaces; } 122 };