1 /*
2 * Copyright (c) 1997, 2025, 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 "classfile/stringTable.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "code/aotCodeCache.hpp"
28 #include "compiler/compiler_globals.hpp"
29 #include "gc/shared/collectedHeap.hpp"
30 #include "gc/shared/gcHeapSummary.hpp"
31 #include "interpreter/bytecodes.hpp"
32 #include "logging/logAsyncWriter.hpp"
33 #include "memory/universe.hpp"
34 #include "nmt/memTracker.hpp"
35 #include "oops/trainingData.hpp"
36 #include "prims/downcallLinker.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "runtime/atomicAccess.hpp"
40 #include "runtime/continuation.hpp"
41 #include "runtime/flags/jvmFlag.hpp"
42 #include "runtime/globals.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/icache.hpp"
45 #include "runtime/init.hpp"
46 #include "runtime/safepoint.hpp"
47 #include "runtime/sharedRuntime.hpp"
48 #include "sanitizers/leak.hpp"
49 #include "utilities/macros.hpp"
50 #if INCLUDE_JVMCI
51 #include "jvmci/jvmci.hpp"
52 #endif
53
54 // Initialization done by VM thread in vm_init_globals()
55 void check_ThreadShadow();
56 void eventlog_init();
57 void mutex_init();
58 void universe_oopstorage_init();
59 void perfMemory_init();
60 void SuspendibleThreadSet_init();
61 void ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
62
63 // Initialization done by Java thread in init_globals()
64 void management_init();
65 void bytecodes_init();
66 void classLoader_init1();
67 void compilationPolicy_init();
68 void codeCache_init();
69 void VM_Version_init();
70 void icache_init2();
71 void initialize_stub_info(); // must precede all blob/stub generation
72 void preuniverse_stubs_init();
73
74 #if INCLUDE_CDS
75 void stubs_AOTAddressTable_init();
76 #endif // INCLUDE_CDS
77 void initial_stubs_init();
78
79 jint universe_init(); // depends on codeCache_init and preuniverse_stubs_init
80 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
81 void gc_barrier_stubs_init();
82 void continuations_init(); // depends on flags (UseCompressedOops) and barrier sets
83 void continuation_stubs_init(); // depend on continuations_init
84 void interpreter_init_stub(); // before any methods loaded
85 void interpreter_init_code(); // after methods loaded, but before they are linked
86 void accessFlags_init();
87 void InterfaceSupport_init();
88 void universe2_init(); // dependent on codeCache_init and initial_stubs_init, loads primordial classes
89 void referenceProcessor_init();
90 void jni_handles_init();
91 void vmStructs_init() NOT_DEBUG_RETURN;
92
93 void vtableStubs_init();
94 bool compilerOracle_init();
95 bool compileBroker_init();
96 void dependencyContext_init();
97 void dependencies_init();
98
99 // Initialization after compiler initialization
100 bool universe_post_init(); // must happen after compiler_init
101 void javaClasses_init(); // must happen after vtable initialization
102 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
103 void final_stubs_init(); // final StubRoutines stubs
104
105 // Do not disable thread-local-storage, as it is important for some
106 // JNI/JVM/JVMTI functions and signal handlers to work properly
107 // during VM shutdown
108 void perfMemory_exit();
109 void ostream_exit();
110
111 void vm_init_globals() {
112 check_ThreadShadow();
113 basic_types_init();
114 eventlog_init();
115 mutex_init();
116 universe_oopstorage_init();
117 perfMemory_init();
118 SuspendibleThreadSet_init();
119 ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
120 }
121
122
123 jint init_globals() {
124 management_init();
125 JvmtiExport::initialize_oop_storage();
126 #if INCLUDE_JVMTI
127 if (AlwaysRecordEvolDependencies) {
128 JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
129 JvmtiExport::set_all_dependencies_are_recorded(true);
130 }
131 #endif
132 bytecodes_init();
133 classLoader_init1();
134 compilationPolicy_init();
135 codeCache_init();
136 VM_Version_init(); // depends on codeCache_init for emitting code
137 VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
138 icache_init2(); // depends on VM_Version for choosing the mechanism
139 // ensure we know about all blobs, stubs and entries
140 initialize_stub_info();
141 // initialize stubs needed before we can init the universe
142 preuniverse_stubs_init();
143 jint status = universe_init(); // dependent on codeCache_init and preuniverse_stubs_init
144 if (status != JNI_OK) {
145 return status;
146 }
147 #ifdef LEAK_SANITIZER
148 {
149 // Register the Java heap with LSan.
150 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
151 LSAN_REGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
152 }
153 #endif // LEAK_SANITIZER
154 AOTCodeCache::init2(); // depends on universe_init, must be before initial_stubs_init
155 AsyncLogWriter::initialize();
156
157 #if INCLUDE_CDS
158 stubs_AOTAddressTable_init(); // publish external addresses used by stubs
159 // depends on AOTCodeCache::init2
160 #endif // INCLUDE_CDS
161 initial_stubs_init(); // stubgen initial stub routines
162 // stack overflow exception blob is referenced by the interpreter
163 SharedRuntime::generate_initial_stubs();
164 gc_barrier_stubs_init(); // depends on universe_init, must be before interpreter_init
165 continuations_init(); // must precede continuation stub generation
166 AOTCodeCache::init3(); // depends on stubs_AOTAddressTable_init
167 // and continuations_init and must
168 // precede continuation stub generation
169 continuation_stubs_init(); // depends on continuations_init and AOTCodeCache::init3
170 #if INCLUDE_JFR
171 SharedRuntime::generate_jfr_stubs();
172 #endif
173 interpreter_init_stub(); // before methods get loaded
174 accessFlags_init();
175 InterfaceSupport_init();
176 SharedRuntime::generate_stubs();
177 SharedRuntime::init_adapter_library(); // do this after AOTCodeCache::init_shared_blobs_table
178 return JNI_OK;
179 }
180
181 jint init_globals2() {
182 universe2_init(); // dependent on codeCache_init and initial_stubs_init
183 javaClasses_init(); // must happen after vtable initialization, before referenceProcessor_init
184 interpreter_init_code(); // after javaClasses_init and before any method gets linked
185 referenceProcessor_init();
186 jni_handles_init();
187 #if INCLUDE_VM_STRUCTS
188 vmStructs_init();
189 #endif // INCLUDE_VM_STRUCTS
190
191 vtableStubs_init();
192 if (!compilerOracle_init()) {
193 return JNI_EINVAL;
194 }
195 dependencyContext_init();
196 dependencies_init();
197
198 if (!compileBroker_init()) {
199 return JNI_EINVAL;
200 }
201 #if INCLUDE_JVMCI
202 if (EnableJVMCI) {
203 JVMCI::initialize_globals();
204 }
205 #endif
206
207 TrainingData::initialize();
208
209 if (!universe_post_init()) {
210 return JNI_ERR;
211 }
212 compiler_stubs_init(false /* in_compiler_thread */); // compiler's intrinsics stubs
213 final_stubs_init(); // final StubRoutines stubs
214 MethodHandles::generate_adapters();
215
216 // All the flags that get adjusted by VM_Version_init and os::init_2
217 // have been set so dump the flags now.
218 if (PrintFlagsFinal || PrintFlagsRanges) {
219 JVMFlag::printFlags(tty, false, PrintFlagsRanges);
220 }
221
222 return JNI_OK;
223 }
224
225
226 void exit_globals() {
227 static bool destructorsCalled = false;
228 if (!destructorsCalled) {
229 destructorsCalled = true;
230 perfMemory_exit();
231 SafepointTracing::statistics_exit_log();
232 if (PrintStringTableStatistics) {
233 SymbolTable::dump(tty);
234 StringTable::dump(tty);
235 }
236 ostream_exit();
237 #ifdef LEAK_SANITIZER
238 {
239 // Unregister the Java heap with LSan.
240 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
241 LSAN_UNREGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
242 }
243 #endif // LEAK_SANITIZER
244 }
245 }
246
247 static volatile bool _init_completed = false;
248
249 bool is_init_completed() {
250 return AtomicAccess::load_acquire(&_init_completed);
251 }
252
253 void wait_init_completed() {
254 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
255 while (!_init_completed) {
256 ml.wait();
257 }
258 }
259
260 void set_init_completed() {
261 assert(Universe::is_fully_initialized(), "Should have completed initialization");
262 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
263 AtomicAccess::release_store(&_init_completed, true);
264 ml.notify_all();
265 }