Mercurial > hg > truffle
annotate src/share/vm/memory/restore.cpp @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
| author | coleenp |
|---|---|
| date | Sun, 13 Apr 2008 17:43:42 -0400 |
| parents | a61af66fc99e |
| children | d1605aabd0a1 |
| rev | line source |
|---|---|
| 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 | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
53 void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
54 |
| 0 | 55 void do_ptr(void** p) { |
| 56 assert(*p == NULL, "initializing previous initialized pointer."); | |
| 57 void* obj = nextOop(); | |
| 58 assert((intptr_t)obj >= 0 || (intptr_t)obj < -100, | |
| 59 "hit tag while initializing ptrs."); | |
| 60 *p = obj; | |
| 61 } | |
| 62 | |
| 63 void do_ptr(HeapWord** p) { do_ptr((void **) p); } | |
| 64 | |
| 65 void do_int(int* p) { | |
| 66 *p = (int)(intptr_t)nextOop(); | |
| 67 } | |
| 68 | |
| 69 void do_size_t(size_t* p) { | |
| 70 // Assumes that size_t and pointers are the same size. | |
| 71 *p = (size_t)nextOop(); | |
| 72 } | |
| 73 | |
| 74 void do_tag(int tag) { | |
| 75 int old_tag; | |
| 76 do_int(&old_tag); | |
| 77 FileMapInfo::assert_mark(tag == old_tag); | |
| 78 } | |
| 79 | |
| 80 void do_region(u_char* start, size_t size) { | |
| 81 assert((intptr_t)start % sizeof(oop) == 0, "bad alignment"); | |
| 82 assert(size % sizeof(oop) == 0, "bad size"); | |
| 83 do_tag((int)size); | |
| 84 while (size > 0) { | |
| 85 *(oop*)start = nextOop(); | |
| 86 start += sizeof(oop); | |
| 87 size -= sizeof(oop); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 bool reading() const { return true; } | |
| 92 }; | |
| 93 | |
| 94 | |
| 95 // Read the oop and miscellaneous data from the shared file, and | |
| 96 // serialize it out to its various destinations. | |
| 97 | |
| 98 void CompactingPermGenGen::initialize_oops() { | |
| 99 FileMapInfo *mapinfo = FileMapInfo::current_info(); | |
| 100 | |
| 101 char* buffer = mapinfo->region_base(md); | |
| 102 | |
| 103 // Skip over (reserve space for) a list of addresses of C++ vtables | |
| 104 // for Klass objects. They get filled in later. | |
| 105 | |
| 106 // Skip over (reserve space for) dummy C++ vtables Klass objects. | |
| 107 // They are used as is. | |
| 108 | |
| 109 void** vtbl_list = (void**)buffer; | |
| 110 buffer += vtbl_list_size * sizeof(void*); | |
| 111 intptr_t vtable_size = *(intptr_t*)buffer; | |
| 112 buffer += sizeof(intptr_t); | |
| 113 buffer += vtable_size; | |
| 114 | |
| 115 // Create the symbol table using the bucket array at this spot in the | |
| 116 // misc data space. Since the symbol table is often modified, this | |
| 117 // region (of mapped pages) will be copy-on-write. | |
| 118 | |
| 119 int symbolTableLen = *(intptr_t*)buffer; | |
| 120 buffer += sizeof(intptr_t); | |
| 121 int number_of_entries = *(intptr_t*)buffer; | |
| 122 buffer += sizeof(intptr_t); | |
| 123 SymbolTable::create_table((HashtableBucket*)buffer, symbolTableLen, | |
| 124 number_of_entries); | |
| 125 buffer += symbolTableLen; | |
| 126 | |
| 127 // Create the string table using the bucket array at this spot in the | |
| 128 // misc data space. Since the string table is often modified, this | |
| 129 // region (of mapped pages) will be copy-on-write. | |
| 130 | |
| 131 int stringTableLen = *(intptr_t*)buffer; | |
| 132 buffer += sizeof(intptr_t); | |
| 133 number_of_entries = *(intptr_t*)buffer; | |
| 134 buffer += sizeof(intptr_t); | |
| 135 StringTable::create_table((HashtableBucket*)buffer, stringTableLen, | |
| 136 number_of_entries); | |
| 137 buffer += stringTableLen; | |
| 138 | |
| 139 // Create the shared dictionary using the bucket array at this spot in | |
| 140 // the misc data space. Since the shared dictionary table is never | |
| 141 // modified, this region (of mapped pages) will be (effectively, if | |
| 142 // not explicitly) read-only. | |
| 143 | |
| 144 int sharedDictionaryLen = *(intptr_t*)buffer; | |
| 145 buffer += sizeof(intptr_t); | |
| 146 number_of_entries = *(intptr_t*)buffer; | |
| 147 buffer += sizeof(intptr_t); | |
| 148 SystemDictionary::set_shared_dictionary((HashtableBucket*)buffer, | |
| 149 sharedDictionaryLen, | |
| 150 number_of_entries); | |
| 151 buffer += sharedDictionaryLen; | |
| 152 | |
| 153 // Create the package info table using the bucket array at this spot in | |
| 154 // the misc data space. Since the package info table is never | |
| 155 // modified, this region (of mapped pages) will be (effectively, if | |
| 156 // not explicitly) read-only. | |
| 157 | |
| 158 int pkgInfoLen = *(intptr_t*)buffer; | |
| 159 buffer += sizeof(intptr_t); | |
| 160 number_of_entries = *(intptr_t*)buffer; | |
| 161 buffer += sizeof(intptr_t); | |
| 162 ClassLoader::create_package_info_table((HashtableBucket*)buffer, pkgInfoLen, | |
| 163 number_of_entries); | |
| 164 buffer += pkgInfoLen; | |
| 165 ClassLoader::verify(); | |
| 166 | |
| 167 // The following data in the shared misc data region are the linked | |
| 168 // list elements (HashtableEntry objects) for the symbol table, string | |
| 169 // table, and shared dictionary. The heap objects refered to by the | |
| 170 // symbol table, string table, and shared dictionary are permanent and | |
| 171 // unmovable. Since new entries added to the string and symbol tables | |
| 172 // are always added at the beginning of the linked lists, THESE LINKED | |
| 173 // LIST ELEMENTS ARE READ-ONLY. | |
| 174 | |
| 175 int len = *(intptr_t*)buffer; // skip over symbol table entries | |
| 176 buffer += sizeof(intptr_t); | |
| 177 buffer += len; | |
| 178 | |
| 179 len = *(intptr_t*)buffer; // skip over string table entries | |
| 180 buffer += sizeof(intptr_t); | |
| 181 buffer += len; | |
| 182 | |
| 183 len = *(intptr_t*)buffer; // skip over shared dictionary entries | |
| 184 buffer += sizeof(intptr_t); | |
| 185 buffer += len; | |
| 186 | |
| 187 len = *(intptr_t*)buffer; // skip over package info table entries | |
| 188 buffer += sizeof(intptr_t); | |
| 189 buffer += len; | |
| 190 | |
| 191 len = *(intptr_t*)buffer; // skip over package info table char[] arrays. | |
| 192 buffer += sizeof(intptr_t); | |
| 193 buffer += len; | |
| 194 | |
| 195 oop* oop_array = (oop*)buffer; | |
| 196 ReadClosure rc(&oop_array); | |
| 197 serialize_oops(&rc); | |
| 198 } |