Sat, 01 Sep 2012 13:25:18 -0400
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
1 /*
2 * Copyright (c) 1997, 2012, 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 */
25 #include "precompiled.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "code/icBuffer.hpp"
28 #include "gc_interface/collectedHeap.hpp"
29 #include "interpreter/bytecodes.hpp"
30 #include "memory/universe.hpp"
31 #include "prims/methodHandles.hpp"
32 #include "runtime/handles.inline.hpp"
33 #include "runtime/icache.hpp"
34 #include "runtime/init.hpp"
35 #include "runtime/safepoint.hpp"
36 #include "runtime/sharedRuntime.hpp"
38 // Initialization done by VM thread in vm_init_globals()
39 void check_ThreadShadow();
40 void eventlog_init();
41 void mutex_init();
42 void chunkpool_init();
43 void perfMemory_init();
45 // Initialization done by Java thread in init_globals()
46 void management_init();
47 void bytecodes_init();
48 void classLoader_init();
49 void codeCache_init();
50 void VM_Version_init();
51 void os_init_globals(); // depends on VM_Version_init, before universe_init
52 void stubRoutines_init1();
53 jint universe_init(); // depends on codeCache_init and stubRoutines_init
54 void interpreter_init(); // before any methods loaded
55 void invocationCounter_init(); // before any methods loaded
56 void marksweep_init();
57 void accessFlags_init();
58 void templateTable_init();
59 void InterfaceSupport_init();
60 void universe2_init(); // dependent on codeCache_init and stubRoutines_init, loads primordial classes
61 void referenceProcessor_init();
62 void jni_handles_init();
63 void vmStructs_init();
65 void vtableStubs_init();
66 void InlineCacheBuffer_init();
67 void compilerOracle_init();
68 void compilationPolicy_init();
69 void compileBroker_init();
71 // Initialization after compiler initialization
72 bool universe_post_init(); // must happen after compiler_init
73 void javaClasses_init(); // must happen after vtable initialization
74 void stubRoutines_init2(); // note: StubRoutines need 2-phase init
76 // Do not disable thread-local-storage, as it is important for some
77 // JNI/JVM/JVMTI functions and signal handlers to work properly
78 // during VM shutdown
79 void perfMemory_exit();
80 void ostream_exit();
82 void vm_init_globals() {
83 check_ThreadShadow();
84 basic_types_init();
85 eventlog_init();
86 mutex_init();
87 chunkpool_init();
88 perfMemory_init();
89 }
92 jint init_globals() {
93 HandleMark hm;
94 management_init();
95 bytecodes_init();
96 classLoader_init();
97 Metaspace::global_initialize(); // must be before codeCache
98 codeCache_init();
99 VM_Version_init();
100 os_init_globals();
101 stubRoutines_init1();
102 jint status = universe_init(); // dependent on codeCache_init and
103 // stubRoutines_init1 and metaspace_init.
104 if (status != JNI_OK)
105 return status;
107 interpreter_init(); // before any methods loaded
108 invocationCounter_init(); // before any methods loaded
109 marksweep_init();
110 accessFlags_init();
111 templateTable_init();
112 InterfaceSupport_init();
113 SharedRuntime::generate_stubs();
114 universe2_init(); // dependent on codeCache_init and stubRoutines_init1
115 referenceProcessor_init();
116 jni_handles_init();
117 #ifndef VM_STRUCTS_KERNEL
118 vmStructs_init();
119 #endif // VM_STRUCTS_KERNEL
121 vtableStubs_init();
122 InlineCacheBuffer_init();
123 compilerOracle_init();
124 compilationPolicy_init();
125 compileBroker_init();
126 VMRegImpl::set_regName();
128 if (!universe_post_init()) {
129 return JNI_ERR;
130 }
131 javaClasses_init(); // must happen after vtable initialization
132 stubRoutines_init2(); // note: StubRoutines need 2-phase init
134 // Although we'd like to, we can't easily do a heap verify
135 // here because the main thread isn't yet a JavaThread, so
136 // its TLAB may not be made parseable from the usual interfaces.
137 if (VerifyBeforeGC && !UseTLAB &&
138 Universe::heap()->total_collections() >= VerifyGCStartAt) {
139 Universe::heap()->prepare_for_verify();
140 Universe::verify(); // make sure we're starting with a clean slate
141 }
143 // All the flags that get adjusted by VM_Version_init and os::init_2
144 // have been set so dump the flags now.
145 if (PrintFlagsFinal) {
146 CommandLineFlags::printFlags(tty, false);
147 }
149 return JNI_OK;
150 }
153 void exit_globals() {
154 static bool destructorsCalled = false;
155 if (!destructorsCalled) {
156 destructorsCalled = true;
157 perfMemory_exit();
158 if (PrintSafepointStatistics) {
159 // Print the collected safepoint statistics.
160 SafepointSynchronize::print_stat_on_exit();
161 }
162 if (PrintStringTableStatistics) {
163 SymbolTable::dump(tty);
164 StringTable::dump(tty);
165 }
166 ostream_exit();
167 }
168 }
171 static bool _init_completed = false;
173 bool is_init_completed() {
174 return _init_completed;
175 }
178 void set_init_completed() {
179 assert(Universe::is_fully_initialized(), "Should have completed initialization");
180 _init_completed = true;
181 }