1 /*
2 * Copyright (c) 2001, 2010, 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 #include "precompiled.hpp"
26 #include "memory/compactPermGen.hpp"
27 #include "memory/defNewGeneration.hpp"
28 #include "memory/filemap.hpp"
29 #include "memory/genRemSet.hpp"
30 #include "memory/generationSpec.hpp"
31 #include "memory/tenuredGeneration.hpp"
32 #include "runtime/java.hpp"
33 #ifndef SERIALGC
34 #include "gc_implementation/concurrentMarkSweep/cmsPermGen.hpp"
35 #include "gc_implementation/parNew/asParNewGeneration.hpp"
36 #include "gc_implementation/parNew/parNewGeneration.hpp"
37 #endif
38
39 Generation* GenerationSpec::init(ReservedSpace rs, int level,
40 GenRemSet* remset) {
41 switch (name()) {
42 case Generation::DefNew:
43 return new DefNewGeneration(rs, init_size(), level);
44
45 case Generation::MarkSweepCompact:
46 return new TenuredGeneration(rs, init_size(), level, remset);
47
48 #ifndef SERIALGC
49 case Generation::ParNew:
50 return new ParNewGeneration(rs, init_size(), level);
51
52 case Generation::ASParNew:
53 return new ASParNewGeneration(rs,
54 init_size(),
55 init_size() /* min size */,
56 level);
57
58 case Generation::ConcurrentMarkSweep: {
59 assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");
60 CardTableRS* ctrs = remset->as_CardTableRS();
61 if (ctrs == NULL) {
62 vm_exit_during_initialization("Rem set incompatibility.");
63 }
64 // Otherwise
65 // The constructor creates the CMSCollector if needed,
66 // else registers with an existing CMSCollector
67
68 ConcurrentMarkSweepGeneration* g = NULL;
69 g = new ConcurrentMarkSweepGeneration(rs,
70 init_size(), level, ctrs, UseCMSAdaptiveFreeLists,
71 (FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice);
72
73 g->initialize_performance_counters();
74
75 return g;
76 }
77
78 case Generation::ASConcurrentMarkSweep: {
79 assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");
80 CardTableRS* ctrs = remset->as_CardTableRS();
81 if (ctrs == NULL) {
82 vm_exit_during_initialization("Rem set incompatibility.");
83 }
84 // Otherwise
85 // The constructor creates the CMSCollector if needed,
86 // else registers with an existing CMSCollector
87
88 ASConcurrentMarkSweepGeneration* g = NULL;
89 g = new ASConcurrentMarkSweepGeneration(rs,
90 init_size(), level, ctrs, UseCMSAdaptiveFreeLists,
91 (FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice);
92
93 g->initialize_performance_counters();
94
95 return g;
96 }
97 #endif // SERIALGC
98
99 default:
100 guarantee(false, "unrecognized GenerationName");
101 return NULL;
102 }
103 }
104
105
106 PermanentGenerationSpec::PermanentGenerationSpec(PermGen::Name name,
107 size_t init_size, size_t max_size,
108 size_t read_only_size, size_t read_write_size,
109 size_t misc_data_size, size_t misc_code_size) {
110 _name = name;
111 _init_size = init_size;
112
113 if (UseSharedSpaces || DumpSharedSpaces) {
114 _enable_shared_spaces = true;
115 if (UseSharedSpaces) {
116 // Override shared space sizes from those in the file.
117 FileMapInfo* mapinfo = FileMapInfo::current_info();
118 _read_only_size = mapinfo->space_capacity(CompactingPermGenGen::ro);
119 _read_write_size = mapinfo->space_capacity(CompactingPermGenGen::rw);
120 _misc_data_size = mapinfo->space_capacity(CompactingPermGenGen::md);
121 _misc_code_size = mapinfo->space_capacity(CompactingPermGenGen::mc);
122 } else {
123 _read_only_size = read_only_size;
124 _read_write_size = read_write_size;
125 _misc_data_size = misc_data_size;
126 _misc_code_size = misc_code_size;
127 }
128 } else {
129 _enable_shared_spaces = false;
130 _read_only_size = 0;
131 _read_write_size = 0;
132 _misc_data_size = 0;
133 _misc_code_size = 0;
134 }
135
136 _max_size = max_size;
137 }
138
139
140 PermGen* PermanentGenerationSpec::init(ReservedSpace rs,
141 size_t init_size,
142 GenRemSet *remset) {
143
144 // Break the reserved spaces into pieces for the permanent space
145 // and the shared spaces.
146 ReservedSpace perm_rs = rs.first_part(_max_size, UseSharedSpaces,
147 UseSharedSpaces);
148 ReservedSpace shared_rs = rs.last_part(_max_size);
149
150 if (enable_shared_spaces()) {
151 if (!perm_rs.is_reserved() ||
152 perm_rs.base() + perm_rs.size() != shared_rs.base()) {
153 FileMapInfo* mapinfo = FileMapInfo::current_info();
154 mapinfo->fail_continue("Sharing disabled - unable to "
155 "reserve address space.");
156 shared_rs.release();
157 disable_sharing();
158 }
159 }
160
161 switch (name()) {
162 case PermGen::MarkSweepCompact:
163 return new CompactingPermGen(perm_rs, shared_rs, init_size, remset, this);
164
165 #ifndef SERIALGC
166 case PermGen::MarkSweep:
167 guarantee(false, "NYI");
168 return NULL;
169
170 case PermGen::ConcurrentMarkSweep: {
171 assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");
172 CardTableRS* ctrs = remset->as_CardTableRS();
173 if (ctrs == NULL) {
174 vm_exit_during_initialization("RemSet/generation incompatibility.");
175 }
176 // XXXPERM
177 return new CMSPermGen(perm_rs, init_size, ctrs,
178 (FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice);
179 }
180 #endif // SERIALGC
181 default:
182 guarantee(false, "unrecognized GenerationName");
183 return NULL;
184 }
185 }
186
187
188 // Alignment
189 void PermanentGenerationSpec::align(size_t alignment) {
190 _init_size = align_size_up(_init_size, alignment);
191 _max_size = align_size_up(_max_size, alignment);
192 _read_only_size = align_size_up(_read_only_size, alignment);
193 _read_write_size = align_size_up(_read_write_size, alignment);
194 _misc_data_size = align_size_up(_misc_data_size, alignment);
195 _misc_code_size = align_size_up(_misc_code_size, alignment);
196
197 assert(enable_shared_spaces() || (_read_only_size + _read_write_size == 0),
198 "Shared space when disabled?");
199 }