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/atomic.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 initial_stubs_init();
72
73 jint universe_init(); // depends on codeCache_init and initial_stubs_init
74 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
75 void gc_barrier_stubs_init();
76 void continuations_init(); // depends on flags (UseCompressedOops) and barrier sets
77 void continuation_stubs_init(); // depend on continuations_init
78 void interpreter_init_stub(); // before any methods loaded
79 void interpreter_init_code(); // after methods loaded, but before they are linked
80 void accessFlags_init();
81 void InterfaceSupport_init();
82 void universe2_init(); // dependent on codeCache_init and initial_stubs_init, loads primordial classes
83 void referenceProcessor_init();
84 void jni_handles_init();
85 void vmStructs_init() NOT_DEBUG_RETURN;
86
87 void vtableStubs_init();
88 bool compilerOracle_init();
89 bool compileBroker_init();
90 void dependencyContext_init();
91 void dependencies_init();
92
93 // Initialization after compiler initialization
94 bool universe_post_init(); // must happen after compiler_init
95 void javaClasses_init(); // must happen after vtable initialization
96 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
97 void final_stubs_init(); // final StubRoutines stubs
98
99 // Do not disable thread-local-storage, as it is important for some
100 // JNI/JVM/JVMTI functions and signal handlers to work properly
101 // during VM shutdown
102 void perfMemory_exit();
103 void ostream_exit();
104
105 void vm_init_globals() {
106 check_ThreadShadow();
107 basic_types_init();
108 eventlog_init();
109 mutex_init();
110 universe_oopstorage_init();
111 perfMemory_init();
112 SuspendibleThreadSet_init();
113 ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
114 }
115
116
117 jint init_globals() {
118 management_init();
119 JvmtiExport::initialize_oop_storage();
120 #if INCLUDE_JVMTI
121 if (AlwaysRecordEvolDependencies) {
122 JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
123 JvmtiExport::set_all_dependencies_are_recorded(true);
124 }
125 #endif
126 bytecodes_init();
127 classLoader_init1();
128 compilationPolicy_init();
129 codeCache_init();
130 VM_Version_init(); // depends on codeCache_init for emitting code
131 icache_init2(); // depends on VM_Version for choosing the mechanism
132 // stub routines in initial blob are referenced by later generated code
133 initial_stubs_init();
134 // stack overflow exception blob is referenced by the interpreter
135 SharedRuntime::generate_initial_stubs();
136 jint status = universe_init(); // dependent on codeCache_init and
137 // initial_stubs_init and metaspace_init.
138 if (status != JNI_OK)
139 return status;
140
141 #ifdef LEAK_SANITIZER
142 {
143 // Register the Java heap with LSan.
144 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
145 LSAN_REGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
146 }
147 #endif // LEAK_SANITIZER
148 AOTCodeCache::init2(); // depends on universe_init
149 AsyncLogWriter::initialize();
150 gc_barrier_stubs_init(); // depends on universe_init, must be before interpreter_init
151 continuations_init(); // must precede continuation stub generation
152 continuation_stubs_init(); // depends on continuations_init
153 #if INCLUDE_JFR
154 SharedRuntime::generate_jfr_stubs();
155 #endif
156 interpreter_init_stub(); // before methods get loaded
157 accessFlags_init();
158 InterfaceSupport_init();
159 VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
160 SharedRuntime::generate_stubs();
161 AOTCodeCache::init_shared_blobs_table(); // need this after generate_stubs
162 SharedRuntime::init_adapter_library(); // do this after AOTCodeCache::init_shared_blobs_table
163 return JNI_OK;
164 }
165
166 jint init_globals2() {
167 universe2_init(); // dependent on codeCache_init and initial_stubs_init
168 javaClasses_init(); // must happen after vtable initialization, before referenceProcessor_init
169 interpreter_init_code(); // after javaClasses_init and before any method gets linked
170 referenceProcessor_init();
171 jni_handles_init();
172 #if INCLUDE_VM_STRUCTS
173 vmStructs_init();
174 #endif // INCLUDE_VM_STRUCTS
175
176 vtableStubs_init();
177 if (!compilerOracle_init()) {
178 return JNI_EINVAL;
179 }
180 dependencyContext_init();
181 dependencies_init();
182
183 if (!compileBroker_init()) {
184 return JNI_EINVAL;
185 }
186 #if INCLUDE_JVMCI
187 if (EnableJVMCI) {
188 JVMCI::initialize_globals();
189 }
190 #endif
191
192 // Initialize TrainingData only we're recording/replaying
193 if (TrainingData::have_data() || TrainingData::need_data()) {
194 TrainingData::initialize();
195 }
196
197 if (!universe_post_init()) {
198 return JNI_ERR;
199 }
200 compiler_stubs_init(false /* in_compiler_thread */); // compiler's intrinsics stubs
201 final_stubs_init(); // final StubRoutines stubs
202 MethodHandles::generate_adapters();
203
204 // All the flags that get adjusted by VM_Version_init and os::init_2
205 // have been set so dump the flags now.
206 if (PrintFlagsFinal || PrintFlagsRanges) {
207 JVMFlag::printFlags(tty, false, PrintFlagsRanges);
208 }
209
210 return JNI_OK;
211 }
212
213
214 void exit_globals() {
215 static bool destructorsCalled = false;
216 if (!destructorsCalled) {
217 destructorsCalled = true;
218 perfMemory_exit();
219 SafepointTracing::statistics_exit_log();
220 if (PrintStringTableStatistics) {
221 SymbolTable::dump(tty);
222 StringTable::dump(tty);
223 }
224 ostream_exit();
225 #ifdef LEAK_SANITIZER
226 {
227 // Unregister the Java heap with LSan.
228 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
229 LSAN_UNREGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
230 }
231 #endif // LEAK_SANITIZER
232 }
233 }
234
235 static volatile bool _init_completed = false;
236
237 bool is_init_completed() {
238 return Atomic::load_acquire(&_init_completed);
239 }
240
241 void wait_init_completed() {
242 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
243 while (!_init_completed) {
244 ml.wait();
245 }
246 }
247
248 void set_init_completed() {
249 assert(Universe::is_fully_initialized(), "Should have completed initialization");
250 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
251 Atomic::release_store(&_init_completed, true);
252 ml.notify_all();
253 }