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 "cds/metaspaceShared.hpp"
26 #include "classfile/stringTable.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "code/aotCodeCache.hpp"
30 #include "compiler/compiler_globals.hpp"
31 #include "gc/shared/collectedHeap.hpp"
32 #include "gc/shared/gcHeapSummary.hpp"
33 #include "interpreter/bytecodes.hpp"
34 #include "logging/logAsyncWriter.hpp"
35 #include "memory/universe.hpp"
36 #include "nmt/memTracker.hpp"
37 #include "oops/trainingData.hpp"
38 #include "prims/downcallLinker.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "prims/methodHandles.hpp"
41 #include "runtime/atomic.hpp"
42 #include "runtime/continuation.hpp"
43 #include "runtime/flags/jvmFlag.hpp"
44 #include "runtime/globals.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/icache.hpp"
47 #include "runtime/init.hpp"
48 #include "runtime/safepoint.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "sanitizers/leak.hpp"
51 #include "utilities/macros.hpp"
52 #include "utilities/xmlstream.hpp"
53 #if INCLUDE_JVMCI
54 #include "jvmci/jvmci.hpp"
55 #endif
56
57 // Initialization done by VM thread in vm_init_globals()
58 void check_ThreadShadow();
59 void eventlog_init();
60 void mutex_init();
61 void universe_oopstorage_init();
62 void perfMemory_init();
63 void SuspendibleThreadSet_init();
64 void ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
65
66 // Initialization done by Java thread in init_globals()
67 void management_init();
68 void bytecodes_init();
69 void classLoader_init1();
70 void compilationPolicy_init();
71 void codeCache_init();
72 void VM_Version_init();
73 void icache_init2();
74 void initial_stubs_init();
75
76 jint universe_init(); // depends on codeCache_init and initial_stubs_init
77 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
78 void gc_barrier_stubs_init();
79 void continuations_init(); // depends on flags (UseCompressedOops) and barrier sets
80 void continuation_stubs_init(); // depend on continuations_init
81 void interpreter_init_stub(); // before any methods loaded
82 void interpreter_init_code(); // after methods loaded, but before they are linked
83 void accessFlags_init();
84 void InterfaceSupport_init();
85 void universe2_init(); // dependent on codeCache_init and initial_stubs_init, loads primordial classes
86 void referenceProcessor_init();
87 void jni_handles_init();
88 void vmStructs_init() NOT_DEBUG_RETURN;
89
90 void vtableStubs_init();
91 bool compilerOracle_init();
92 bool compileBroker_init();
93 void dependencyContext_init();
94 void dependencies_init();
95
96 // initialize upcalls before class loading
97 bool runtimeUpcalls_open_registration();
98 bool runtimeUpcallNop_register_upcalls();
99 #if INCLUDE_CDS
100 bool cdsEndTrainingUpcall_register_upcalls();
101 #endif // INCLUDE_CDS
102 void runtimeUpcalls_close_registration();
103
104 // Initialization after compiler initialization
105 bool universe_post_init(); // must happen after compiler_init
106 void javaClasses_init(); // must happen after vtable initialization
107 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
108 void final_stubs_init(); // final StubRoutines stubs
109
110 // Do not disable thread-local-storage, as it is important for some
111 // JNI/JVM/JVMTI functions and signal handlers to work properly
112 // during VM shutdown
113 void perfMemory_exit();
114 void ostream_exit();
115
116 void perf_jvm_init();
117
118 void vm_init_globals() {
119 check_ThreadShadow();
120 basic_types_init();
121 eventlog_init();
122 mutex_init();
123 universe_oopstorage_init();
124 perfMemory_init();
125 SuspendibleThreadSet_init();
126 ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
127 }
128
129
130 jint init_globals() {
131 perf_jvm_init();
132 MethodHandles::init_counters();
133
134 management_init();
135 JvmtiExport::initialize_oop_storage();
136 #if INCLUDE_JVMTI
137 if (AlwaysRecordEvolDependencies) {
138 JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
139 JvmtiExport::set_all_dependencies_are_recorded(true);
140 }
141 #endif
142 bytecodes_init();
143 classLoader_init1();
144 compilationPolicy_init();
145 MetaspaceShared::open_static_archive();
146 codeCache_init();
147 VM_Version_init(); // depends on codeCache_init for emitting code
148 icache_init2(); // depends on VM_Version for choosing the mechanism
149 // stub routines in initial blob are referenced by later generated code
150 initial_stubs_init();
151 // stack overflow exception blob is referenced by the interpreter
152 SharedRuntime::generate_initial_stubs();
153 jint status = universe_init(); // dependent on codeCache_init and
154 // initial_stubs_init and metaspace_init.
155 if (status != JNI_OK)
156 return status;
157 #ifdef LEAK_SANITIZER
158 {
159 // Register the Java heap with LSan.
160 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
161 LSAN_REGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
162 }
163 #endif // LEAK_SANITIZER
164 AOTCodeCache::init2(); // depends on universe_init
165 AsyncLogWriter::initialize();
166 gc_barrier_stubs_init(); // depends on universe_init, must be before interpreter_init
167 continuations_init(); // must precede continuation stub generation
168 continuation_stubs_init(); // depends on continuations_init
169 #if INCLUDE_JFR
170 SharedRuntime::generate_jfr_stubs();
171 #endif
172 interpreter_init_stub(); // before methods get loaded
173 accessFlags_init();
174 InterfaceSupport_init();
175 VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
176 SharedRuntime::generate_stubs();
177 AOTCodeCache::init_shared_blobs_table(); // need this after generate_stubs
178 SharedRuntime::init_adapter_library(); // do this after AOTCodeCache::init_shared_blobs_table
179 return JNI_OK;
180 }
181
182 jint init_globals2() {
183 universe2_init(); // dependent on codeCache_init and initial_stubs_init
184
185 // initialize upcalls before class loading / initialization
186 runtimeUpcalls_open_registration();
187 if (!runtimeUpcallNop_register_upcalls()) {
188 return JNI_EINVAL;
189 }
190 #if INCLUDE_CDS
191 if (!cdsEndTrainingUpcall_register_upcalls()) {
192 return JNI_EINVAL;
193 }
194 #endif // INCLUDE_CDS
195 runtimeUpcalls_close_registration();
196
197 javaClasses_init(); // must happen after vtable initialization, before referenceProcessor_init
198 interpreter_init_code(); // after javaClasses_init and before any method gets linked
199 referenceProcessor_init();
200 jni_handles_init();
201 #if INCLUDE_VM_STRUCTS
202 vmStructs_init();
203 #endif // INCLUDE_VM_STRUCTS
204
205 vtableStubs_init();
206 if (!compilerOracle_init()) {
207 return JNI_EINVAL;
208 }
209 dependencyContext_init();
210 dependencies_init();
211
212 if (!compileBroker_init()) {
213 return JNI_EINVAL;
214 }
215 #if INCLUDE_JVMCI
216 if (EnableJVMCI) {
217 JVMCI::initialize_globals();
218 }
219 #endif
220 // Initialize TrainingData only we're recording/replaying
221 if (TrainingData::have_data() || TrainingData::need_data()) {
222 TrainingData::initialize();
223 }
224
225 // Initialize TrainingData only we're recording/replaying
226 if (TrainingData::have_data() || TrainingData::need_data()) {
227 TrainingData::initialize();
228 }
229
230 if (!universe_post_init()) {
231 return JNI_ERR;
232 }
233 compiler_stubs_init(false /* in_compiler_thread */); // compiler's intrinsics stubs
234 final_stubs_init(); // final StubRoutines stubs
235 AOTCodeCache::init_stubs_table();
236 MethodHandles::generate_adapters();
237
238 // All the flags that get adjusted by VM_Version_init and os::init_2
239 // have been set so dump the flags now.
240 if (PrintFlagsFinal || PrintFlagsRanges) {
241 JVMFlag::printFlags(tty, false, PrintFlagsRanges);
242 } else if (AOTRecordTraining && xtty != nullptr) {
243 JVMFlag::printFlags(xtty->log_only(), false, PrintFlagsRanges);
244 }
245
246 return JNI_OK;
247 }
248
249
250 void exit_globals() {
251 static bool destructorsCalled = false;
252 if (!destructorsCalled) {
253 destructorsCalled = true;
254 perfMemory_exit();
255 SafepointTracing::statistics_exit_log();
256 if (PrintStringTableStatistics) {
257 SymbolTable::dump(tty);
258 StringTable::dump(tty);
259 }
260 ostream_exit();
261 #ifdef LEAK_SANITIZER
262 {
263 // Unregister the Java heap with LSan.
264 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
265 LSAN_UNREGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
266 }
267 #endif // LEAK_SANITIZER
268 }
269 }
270
271 static volatile bool _init_completed = false;
272
273 bool is_init_completed() {
274 return Atomic::load_acquire(&_init_completed);
275 }
276
277 void wait_init_completed() {
278 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
279 while (!_init_completed) {
280 ml.wait();
281 }
282 }
283
284 void set_init_completed() {
285 assert(Universe::is_fully_initialized(), "Should have completed initialization");
286 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
287 Atomic::release_store(&_init_completed, true);
288 ml.notify_all();
289 }