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