0
|
1 /*
|
|
2 * Copyright 2003-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 * have any questions.
|
|
22 *
|
|
23 */
|
|
24
|
|
25 # include "incls/_precompiled.incl"
|
|
26 # include "incls/_restore.cpp.incl"
|
|
27
|
|
28
|
|
29 // Closure for serializing initialization data in from a data area
|
|
30 // (oop_array) read from the shared file.
|
|
31
|
|
32 class ReadClosure : public SerializeOopClosure {
|
|
33 private:
|
|
34 oop** _oop_array;
|
|
35
|
|
36 inline oop nextOop() {
|
|
37 return *(*_oop_array)++;
|
|
38 }
|
|
39
|
|
40 public:
|
|
41 ReadClosure(oop** oop_array) { _oop_array = oop_array; }
|
|
42
|
|
43 void do_oop(oop* p) {
|
|
44 assert(SharedSkipVerify || *p == NULL || *p == Universe::klassKlassObj(),
|
|
45 "initializing previously initialized oop.");
|
|
46 oop obj = nextOop();
|
|
47 assert(SharedSkipVerify || (intptr_t)obj >= 0 || (intptr_t)obj < -100,
|
|
48 "hit tag while initializing oops.");
|
|
49 assert(SharedSkipVerify || obj->is_oop_or_null(), "invalid oop");
|
|
50 *p = obj;
|
|
51 }
|
|
52
|
|
53 void do_ptr(void** p) {
|
|
54 assert(*p == NULL, "initializing previous initialized pointer.");
|
|
55 void* obj = nextOop();
|
|
56 assert((intptr_t)obj >= 0 || (intptr_t)obj < -100,
|
|
57 "hit tag while initializing ptrs.");
|
|
58 *p = obj;
|
|
59 }
|
|
60
|
|
61 void do_ptr(HeapWord** p) { do_ptr((void **) p); }
|
|
62
|
|
63 void do_int(int* p) {
|
|
64 *p = (int)(intptr_t)nextOop();
|
|
65 }
|
|
66
|
|
67 void do_size_t(size_t* p) {
|
|
68 // Assumes that size_t and pointers are the same size.
|
|
69 *p = (size_t)nextOop();
|
|
70 }
|
|
71
|
|
72 void do_tag(int tag) {
|
|
73 int old_tag;
|
|
74 do_int(&old_tag);
|
|
75 FileMapInfo::assert_mark(tag == old_tag);
|
|
76 }
|
|
77
|
|
78 void do_region(u_char* start, size_t size) {
|
|
79 assert((intptr_t)start % sizeof(oop) == 0, "bad alignment");
|
|
80 assert(size % sizeof(oop) == 0, "bad size");
|
|
81 do_tag((int)size);
|
|
82 while (size > 0) {
|
|
83 *(oop*)start = nextOop();
|
|
84 start += sizeof(oop);
|
|
85 size -= sizeof(oop);
|
|
86 }
|
|
87 }
|
|
88
|
|
89 bool reading() const { return true; }
|
|
90 };
|
|
91
|
|
92
|
|
93 // Read the oop and miscellaneous data from the shared file, and
|
|
94 // serialize it out to its various destinations.
|
|
95
|
|
96 void CompactingPermGenGen::initialize_oops() {
|
|
97 FileMapInfo *mapinfo = FileMapInfo::current_info();
|
|
98
|
|
99 char* buffer = mapinfo->region_base(md);
|
|
100
|
|
101 // Skip over (reserve space for) a list of addresses of C++ vtables
|
|
102 // for Klass objects. They get filled in later.
|
|
103
|
|
104 // Skip over (reserve space for) dummy C++ vtables Klass objects.
|
|
105 // They are used as is.
|
|
106
|
|
107 void** vtbl_list = (void**)buffer;
|
|
108 buffer += vtbl_list_size * sizeof(void*);
|
|
109 intptr_t vtable_size = *(intptr_t*)buffer;
|
|
110 buffer += sizeof(intptr_t);
|
|
111 buffer += vtable_size;
|
|
112
|
|
113 // Create the symbol table using the bucket array at this spot in the
|
|
114 // misc data space. Since the symbol table is often modified, this
|
|
115 // region (of mapped pages) will be copy-on-write.
|
|
116
|
|
117 int symbolTableLen = *(intptr_t*)buffer;
|
|
118 buffer += sizeof(intptr_t);
|
|
119 int number_of_entries = *(intptr_t*)buffer;
|
|
120 buffer += sizeof(intptr_t);
|
|
121 SymbolTable::create_table((HashtableBucket*)buffer, symbolTableLen,
|
|
122 number_of_entries);
|
|
123 buffer += symbolTableLen;
|
|
124
|
|
125 // Create the string table using the bucket array at this spot in the
|
|
126 // misc data space. Since the string table is often modified, this
|
|
127 // region (of mapped pages) will be copy-on-write.
|
|
128
|
|
129 int stringTableLen = *(intptr_t*)buffer;
|
|
130 buffer += sizeof(intptr_t);
|
|
131 number_of_entries = *(intptr_t*)buffer;
|
|
132 buffer += sizeof(intptr_t);
|
|
133 StringTable::create_table((HashtableBucket*)buffer, stringTableLen,
|
|
134 number_of_entries);
|
|
135 buffer += stringTableLen;
|
|
136
|
|
137 // Create the shared dictionary using the bucket array at this spot in
|
|
138 // the misc data space. Since the shared dictionary table is never
|
|
139 // modified, this region (of mapped pages) will be (effectively, if
|
|
140 // not explicitly) read-only.
|
|
141
|
|
142 int sharedDictionaryLen = *(intptr_t*)buffer;
|
|
143 buffer += sizeof(intptr_t);
|
|
144 number_of_entries = *(intptr_t*)buffer;
|
|
145 buffer += sizeof(intptr_t);
|
|
146 SystemDictionary::set_shared_dictionary((HashtableBucket*)buffer,
|
|
147 sharedDictionaryLen,
|
|
148 number_of_entries);
|
|
149 buffer += sharedDictionaryLen;
|
|
150
|
|
151 // Create the package info table using the bucket array at this spot in
|
|
152 // the misc data space. Since the package info table is never
|
|
153 // modified, this region (of mapped pages) will be (effectively, if
|
|
154 // not explicitly) read-only.
|
|
155
|
|
156 int pkgInfoLen = *(intptr_t*)buffer;
|
|
157 buffer += sizeof(intptr_t);
|
|
158 number_of_entries = *(intptr_t*)buffer;
|
|
159 buffer += sizeof(intptr_t);
|
|
160 ClassLoader::create_package_info_table((HashtableBucket*)buffer, pkgInfoLen,
|
|
161 number_of_entries);
|
|
162 buffer += pkgInfoLen;
|
|
163 ClassLoader::verify();
|
|
164
|
|
165 // The following data in the shared misc data region are the linked
|
|
166 // list elements (HashtableEntry objects) for the symbol table, string
|
|
167 // table, and shared dictionary. The heap objects refered to by the
|
|
168 // symbol table, string table, and shared dictionary are permanent and
|
|
169 // unmovable. Since new entries added to the string and symbol tables
|
|
170 // are always added at the beginning of the linked lists, THESE LINKED
|
|
171 // LIST ELEMENTS ARE READ-ONLY.
|
|
172
|
|
173 int len = *(intptr_t*)buffer; // skip over symbol table entries
|
|
174 buffer += sizeof(intptr_t);
|
|
175 buffer += len;
|
|
176
|
|
177 len = *(intptr_t*)buffer; // skip over string table entries
|
|
178 buffer += sizeof(intptr_t);
|
|
179 buffer += len;
|
|
180
|
|
181 len = *(intptr_t*)buffer; // skip over shared dictionary entries
|
|
182 buffer += sizeof(intptr_t);
|
|
183 buffer += len;
|
|
184
|
|
185 len = *(intptr_t*)buffer; // skip over package info table entries
|
|
186 buffer += sizeof(intptr_t);
|
|
187 buffer += len;
|
|
188
|
|
189 len = *(intptr_t*)buffer; // skip over package info table char[] arrays.
|
|
190 buffer += sizeof(intptr_t);
|
|
191 buffer += len;
|
|
192
|
|
193 oop* oop_array = (oop*)buffer;
|
|
194 ReadClosure rc(&oop_array);
|
|
195 serialize_oops(&rc);
|
|
196 }
|