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 preuniverse_stubs_init();
72 void initial_stubs_init();
73
74 jint universe_init(); // depends on codeCache_init and preuniverse_stubs_init
75 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
76 void gc_barrier_stubs_init();
77 void continuations_init(); // depends on flags (UseCompressedOops) and barrier sets
78 void continuation_stubs_init(); // depend on continuations_init
79 void interpreter_init_stub(); // before any methods loaded
80 void interpreter_init_code(); // after methods loaded, but before they are linked
81 void accessFlags_init();
82 void InterfaceSupport_init();
83 void universe2_init(); // dependent on codeCache_init and initial_stubs_init, loads primordial classes
84 void referenceProcessor_init();
85 void jni_handles_init();
86 void vmStructs_init() NOT_DEBUG_RETURN;
87
88 void vtableStubs_init();
89 bool compilerOracle_init();
90 bool compileBroker_init();
91 void dependencyContext_init();
92 void dependencies_init();
93
94 // Initialization after compiler initialization
95 bool universe_post_init(); // must happen after compiler_init
96 void javaClasses_init(); // must happen after vtable initialization
97 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
98 void final_stubs_init(); // final StubRoutines stubs
99
100 // Do not disable thread-local-storage, as it is important for some
101 // JNI/JVM/JVMTI functions and signal handlers to work properly
102 // during VM shutdown
103 void perfMemory_exit();
104 void ostream_exit();
105
106 void vm_init_globals() {
107 check_ThreadShadow();
108 basic_types_init();
109 eventlog_init();
110 mutex_init();
111 universe_oopstorage_init();
112 perfMemory_init();
113 SuspendibleThreadSet_init();
114 ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
115 }
116
117
118 jint init_globals() {
119 management_init();
120 JvmtiExport::initialize_oop_storage();
121 #if INCLUDE_JVMTI
122 if (AlwaysRecordEvolDependencies) {
123 JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
124 JvmtiExport::set_all_dependencies_are_recorded(true);
125 }
126 #endif
127 bytecodes_init();
128 classLoader_init1();
129 compilationPolicy_init();
130 codeCache_init();
131 VM_Version_init(); // depends on codeCache_init for emitting code
132 VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
133 icache_init2(); // depends on VM_Version for choosing the mechanism
134 // initialize stubs needed before we can init the universe
135 preuniverse_stubs_init();
136 jint status = universe_init(); // dependent on codeCache_init and preuniverse_stubs_init
137 if (status != JNI_OK) {
138 return status;
139 }
140 #ifdef LEAK_SANITIZER
141 {
142 // Register the Java heap with LSan.
143 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
144 LSAN_REGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
145 }
146 #endif // LEAK_SANITIZER
147 AOTCodeCache::init2(); // depends on universe_init, must be before initial_stubs_init
148 AsyncLogWriter::initialize();
149
150 initial_stubs_init(); // initial stub routines
151 // stack overflow exception blob is referenced by the interpreter
152 SharedRuntime::generate_initial_stubs();
153 AOTCodeCache::init_early_stubs_table(); // need this after initial_stubs
154 gc_barrier_stubs_init(); // depends on universe_init, must be before interpreter_init
155 continuations_init(); // must precede continuation stub generation
156 continuation_stubs_init(); // depends on continuations_init
157 #if INCLUDE_JFR
158 SharedRuntime::generate_jfr_stubs();
159 #endif
160 interpreter_init_stub(); // before methods get loaded
161 accessFlags_init();
162 InterfaceSupport_init();
163 SharedRuntime::generate_stubs();
164 AOTCodeCache::init_shared_blobs_table(); // need this after generate_stubs
165 SharedRuntime::init_adapter_library(); // do this after AOTCodeCache::init_shared_blobs_table
166 return JNI_OK;
167 }
168
169 jint init_globals2() {
170 universe2_init(); // dependent on codeCache_init and initial_stubs_init
171 javaClasses_init(); // must happen after vtable initialization, before referenceProcessor_init
172 interpreter_init_code(); // after javaClasses_init and before any method gets linked
173 referenceProcessor_init();
174 jni_handles_init();
175 #if INCLUDE_VM_STRUCTS
176 vmStructs_init();
177 #endif // INCLUDE_VM_STRUCTS
178
179 vtableStubs_init();
180 if (!compilerOracle_init()) {
181 return JNI_EINVAL;
182 }
183 dependencyContext_init();
184 dependencies_init();
185
186 if (!compileBroker_init()) {
187 return JNI_EINVAL;
188 }
189 #if INCLUDE_JVMCI
190 if (EnableJVMCI) {
191 JVMCI::initialize_globals();
192 }
193 #endif
194
195 // Initialize TrainingData only we're recording/replaying
196 if (TrainingData::have_data() || TrainingData::need_data()) {
197 TrainingData::initialize();
198 }
199
200 if (!universe_post_init()) {
201 return JNI_ERR;
202 }
203 compiler_stubs_init(false /* in_compiler_thread */); // compiler's intrinsics stubs
204 final_stubs_init(); // final StubRoutines stubs
205 MethodHandles::generate_adapters();
206
207 // All the flags that get adjusted by VM_Version_init and os::init_2
208 // have been set so dump the flags now.
209 if (PrintFlagsFinal || PrintFlagsRanges) {
210 JVMFlag::printFlags(tty, false, PrintFlagsRanges);
211 }
212
213 return JNI_OK;
214 }
215
216
217 void exit_globals() {
218 static bool destructorsCalled = false;
219 if (!destructorsCalled) {
220 destructorsCalled = true;
221 perfMemory_exit();
222 SafepointTracing::statistics_exit_log();
223 if (PrintStringTableStatistics) {
224 SymbolTable::dump(tty);
225 StringTable::dump(tty);
226 }
227 ostream_exit();
228 #ifdef LEAK_SANITIZER
229 {
230 // Unregister the Java heap with LSan.
231 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
232 LSAN_UNREGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
233 }
234 #endif // LEAK_SANITIZER
235 }
236 }
237
238 static volatile bool _init_completed = false;
239
240 bool is_init_completed() {
241 return Atomic::load_acquire(&_init_completed);
242 }
243
244 void wait_init_completed() {
245 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
246 while (!_init_completed) {
247 ml.wait();
248 }
249 }
250
251 void set_init_completed() {
252 assert(Universe::is_fully_initialized(), "Should have completed initialization");
253 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
254 Atomic::release_store(&_init_completed, true);
255 ml.notify_all();
256 }