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 initialize_stub_info(); // must precede all blob/stub generation
72 void preuniverse_stubs_init();
73 void initial_stubs_init();
74
75 jint universe_init(); // depends on codeCache_init and preuniverse_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 // Initialization after compiler initialization
96 bool universe_post_init(); // must happen after compiler_init
97 void javaClasses_init(); // must happen after vtable initialization
98 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
99 void final_stubs_init(); // final StubRoutines stubs
100
101 // Do not disable thread-local-storage, as it is important for some
102 // JNI/JVM/JVMTI functions and signal handlers to work properly
103 // during VM shutdown
104 void perfMemory_exit();
105 void ostream_exit();
106
107 void vm_init_globals() {
108 check_ThreadShadow();
109 basic_types_init();
110 eventlog_init();
111 mutex_init();
112 universe_oopstorage_init();
113 perfMemory_init();
114 SuspendibleThreadSet_init();
115 ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
116 }
117
118
119 jint init_globals() {
120 management_init();
121 JvmtiExport::initialize_oop_storage();
122 #if INCLUDE_JVMTI
123 if (AlwaysRecordEvolDependencies) {
124 JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
125 JvmtiExport::set_all_dependencies_are_recorded(true);
126 }
127 #endif
128 bytecodes_init();
129 classLoader_init1();
130 compilationPolicy_init();
131 codeCache_init();
132 VM_Version_init(); // depends on codeCache_init for emitting code
133 icache_init2(); // depends on VM_Version for choosing the mechanism
134 // ensure we know about all blobs, stubs and entries
135 initialize_stub_info();
136 // initialize stubs needed before we can init the universe
137 preuniverse_stubs_init();
138 jint status = universe_init(); // dependent on codeCache_init and preuniverse_stubs_init
139 if (status != JNI_OK) {
140 return status;
141 }
142 #ifdef LEAK_SANITIZER
143 {
144 // Register the Java heap with LSan.
145 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
146 LSAN_REGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
147 }
148 #endif // LEAK_SANITIZER
149 AOTCodeCache::init2(); // depends on universe_init, must be before initial_stubs_init
150 AsyncLogWriter::initialize();
151
152 initial_stubs_init(); // stubgen initial stub routines
153 // stack overflow exception blob is referenced by the interpreter
154 AOTCodeCache::init_early_stubs_table(); // need this after stubgen initial stubs and before shared runtime initial stubs
155 SharedRuntime::generate_initial_stubs();
156 gc_barrier_stubs_init(); // depends on universe_init, must be before interpreter_init
157 continuations_init(); // must precede continuation stub generation
158 continuation_stubs_init(); // depends on continuations_init
159 #if INCLUDE_JFR
160 SharedRuntime::generate_jfr_stubs();
161 #endif
162 interpreter_init_stub(); // before methods get loaded
163 accessFlags_init();
164 InterfaceSupport_init();
165 VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
166 SharedRuntime::generate_stubs();
167 AOTCodeCache::init_shared_blobs_table(); // need this after generate_stubs
168 SharedRuntime::init_adapter_library(); // do this after AOTCodeCache::init_shared_blobs_table
169 return JNI_OK;
170 }
171
172 jint init_globals2() {
173 universe2_init(); // dependent on codeCache_init and initial_stubs_init
174 javaClasses_init(); // must happen after vtable initialization, before referenceProcessor_init
175 interpreter_init_code(); // after javaClasses_init and before any method gets linked
176 referenceProcessor_init();
177 jni_handles_init();
178 #if INCLUDE_VM_STRUCTS
179 vmStructs_init();
180 #endif // INCLUDE_VM_STRUCTS
181
182 vtableStubs_init();
183 if (!compilerOracle_init()) {
184 return JNI_EINVAL;
185 }
186 dependencyContext_init();
187 dependencies_init();
188
189 if (!compileBroker_init()) {
190 return JNI_EINVAL;
191 }
192 #if INCLUDE_JVMCI
193 if (EnableJVMCI) {
194 JVMCI::initialize_globals();
195 }
196 #endif
197
198 // Initialize TrainingData only we're recording/replaying
199 if (TrainingData::have_data() || TrainingData::need_data()) {
200 TrainingData::initialize();
201 }
202
203 if (!universe_post_init()) {
204 return JNI_ERR;
205 }
206 compiler_stubs_init(false /* in_compiler_thread */); // compiler's intrinsics stubs
207 final_stubs_init(); // final StubRoutines stubs
208 MethodHandles::generate_adapters();
209
210 // All the flags that get adjusted by VM_Version_init and os::init_2
211 // have been set so dump the flags now.
212 if (PrintFlagsFinal || PrintFlagsRanges) {
213 JVMFlag::printFlags(tty, false, PrintFlagsRanges);
214 }
215
216 return JNI_OK;
217 }
218
219
220 void exit_globals() {
221 static bool destructorsCalled = false;
222 if (!destructorsCalled) {
223 destructorsCalled = true;
224 perfMemory_exit();
225 SafepointTracing::statistics_exit_log();
226 if (PrintStringTableStatistics) {
227 SymbolTable::dump(tty);
228 StringTable::dump(tty);
229 }
230 ostream_exit();
231 #ifdef LEAK_SANITIZER
232 {
233 // Unregister the Java heap with LSan.
234 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
235 LSAN_UNREGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
236 }
237 #endif // LEAK_SANITIZER
238 }
239 }
240
241 static volatile bool _init_completed = false;
242
243 bool is_init_completed() {
244 return Atomic::load_acquire(&_init_completed);
245 }
246
247 void wait_init_completed() {
248 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
249 while (!_init_completed) {
250 ml.wait();
251 }
252 }
253
254 void set_init_completed() {
255 assert(Universe::is_fully_initialized(), "Should have completed initialization");
256 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
257 Atomic::release_store(&_init_completed, true);
258 ml.notify_all();
259 }