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/aotMetaspace.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 initialize_stub_info(); // must precede all blob/stub generation
75 void preuniverse_stubs_init();
76 void initial_stubs_init();
77
78 jint universe_init(); // depends on codeCache_init and preuniverse_stubs_init
79 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
80 void gc_barrier_stubs_init();
81 void continuations_init(); // depends on flags (UseCompressedOops) and barrier sets
82 void continuation_stubs_init(); // depend on continuations_init
83 void interpreter_init_stub(); // before any methods loaded
84 void interpreter_init_code(); // after methods loaded, but before they are linked
85 void accessFlags_init();
86 void InterfaceSupport_init();
87 void universe2_init(); // dependent on codeCache_init and initial_stubs_init, loads primordial classes
88 void referenceProcessor_init();
89 void jni_handles_init();
90 void vmStructs_init() NOT_DEBUG_RETURN;
91
92 void vtableStubs_init();
93 bool compilerOracle_init();
94 bool compileBroker_init();
95 void dependencyContext_init();
96 void dependencies_init();
97
98 // initialize upcalls before class loading
99 bool runtimeUpcalls_open_registration();
100 bool runtimeUpcallNop_register_upcalls();
101 #if INCLUDE_CDS
102 bool cdsEndTrainingUpcall_register_upcalls();
103 #endif // INCLUDE_CDS
104 void runtimeUpcalls_close_registration();
105
106 // Initialization after compiler initialization
107 bool universe_post_init(); // must happen after compiler_init
108 void javaClasses_init(); // must happen after vtable initialization
109 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
110 void final_stubs_init(); // final StubRoutines stubs
111
112 // Do not disable thread-local-storage, as it is important for some
113 // JNI/JVM/JVMTI functions and signal handlers to work properly
114 // during VM shutdown
115 void perfMemory_exit();
116 void ostream_exit();
117
118 void perf_jvm_init();
119
120 void vm_init_globals() {
121 check_ThreadShadow();
122 basic_types_init();
123 eventlog_init();
124 mutex_init();
125 universe_oopstorage_init();
126 perfMemory_init();
127 SuspendibleThreadSet_init();
128 ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
129 }
130
131
132 jint init_globals() {
133 perf_jvm_init();
134 MethodHandles::init_counters();
135
136 management_init();
137 JvmtiExport::initialize_oop_storage();
138 #if INCLUDE_JVMTI
139 if (AlwaysRecordEvolDependencies) {
140 JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
141 JvmtiExport::set_all_dependencies_are_recorded(true);
142 }
143 #endif
144 bytecodes_init();
145 classLoader_init1();
146 compilationPolicy_init();
147 AOTMetaspace::open_static_archive();
148 codeCache_init();
149 VM_Version_init(); // depends on codeCache_init for emitting code
150 icache_init2(); // depends on VM_Version for choosing the mechanism
151 // ensure we know about all blobs, stubs and entries
152 initialize_stub_info();
153 // initialize stubs needed before we can init the universe
154 preuniverse_stubs_init();
155 jint status = universe_init(); // dependent on codeCache_init and preuniverse_stubs_init
156 if (status != JNI_OK) {
157 return status;
158 }
159 #ifdef LEAK_SANITIZER
160 {
161 // Register the Java heap with LSan.
162 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
163 LSAN_REGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
164 }
165 #endif // LEAK_SANITIZER
166 AOTCodeCache::init2(); // depends on universe_init, must be before initial_stubs_init
167 AsyncLogWriter::initialize();
168
169 initial_stubs_init(); // stubgen initial stub routines
170 // stack overflow exception blob is referenced by the interpreter
171 AOTCodeCache::init_early_stubs_table(); // need this after stubgen initial stubs and before shared runtime initial stubs
172 SharedRuntime::generate_initial_stubs();
173 gc_barrier_stubs_init(); // depends on universe_init, must be before interpreter_init
174 continuations_init(); // must precede continuation stub generation
175 continuation_stubs_init(); // depends on continuations_init
176 #if INCLUDE_JFR
177 SharedRuntime::generate_jfr_stubs();
178 #endif
179 interpreter_init_stub(); // before methods get loaded
180 accessFlags_init();
181 InterfaceSupport_init();
182 VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
183 SharedRuntime::generate_stubs();
184 AOTCodeCache::init_shared_blobs_table(); // need this after generate_stubs
185 SharedRuntime::init_adapter_library(); // do this after AOTCodeCache::init_shared_blobs_table
186 return JNI_OK;
187 }
188
189 jint init_globals2() {
190 universe2_init(); // dependent on codeCache_init and initial_stubs_init
191
192 // initialize upcalls before class loading / initialization
193 runtimeUpcalls_open_registration();
194 if (!runtimeUpcallNop_register_upcalls()) {
195 return JNI_EINVAL;
196 }
197 #if INCLUDE_CDS
198 if (!cdsEndTrainingUpcall_register_upcalls()) {
199 return JNI_EINVAL;
200 }
201 #endif // INCLUDE_CDS
202 runtimeUpcalls_close_registration();
203
204 javaClasses_init(); // must happen after vtable initialization, before referenceProcessor_init
205 interpreter_init_code(); // after javaClasses_init and before any method gets linked
206 referenceProcessor_init();
207 jni_handles_init();
208 #if INCLUDE_VM_STRUCTS
209 vmStructs_init();
210 #endif // INCLUDE_VM_STRUCTS
211
212 vtableStubs_init();
213 if (!compilerOracle_init()) {
214 return JNI_EINVAL;
215 }
216 dependencyContext_init();
217 dependencies_init();
218
219 if (!compileBroker_init()) {
220 return JNI_EINVAL;
221 }
222 #if INCLUDE_JVMCI
223 if (EnableJVMCI) {
224 JVMCI::initialize_globals();
225 }
226 #endif
227
228 TrainingData::initialize();
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 }