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 "prims/downcallLinker.hpp"
36 #include "prims/jvmtiExport.hpp"
37 #include "prims/methodHandles.hpp"
38 #include "runtime/atomic.hpp"
39 #include "runtime/continuation.hpp"
40 #include "runtime/flags/jvmFlag.hpp"
41 #include "runtime/globals.hpp"
42 #include "runtime/handles.inline.hpp"
43 #include "runtime/icache.hpp"
44 #include "runtime/init.hpp"
45 #include "runtime/safepoint.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "sanitizers/leak.hpp"
48 #include "utilities/macros.hpp"
49 #if INCLUDE_JVMCI
50 #include "jvmci/jvmci.hpp"
51 #endif
52
53 // Initialization done by VM thread in vm_init_globals()
54 void check_ThreadShadow();
55 void eventlog_init();
56 void mutex_init();
57 void universe_oopstorage_init();
58 void perfMemory_init();
59 void SuspendibleThreadSet_init();
60 void ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
61
62 // Initialization done by Java thread in init_globals()
63 void management_init();
64 void bytecodes_init();
65 void classLoader_init1();
66 void compilationPolicy_init();
67 void codeCache_init();
68 void VM_Version_init();
69 void icache_init2();
70 void initial_stubs_init();
71
72 jint universe_init(); // depends on codeCache_init and initial_stubs_init
73 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
74 void gc_barrier_stubs_init();
75 void continuations_init(); // depends on flags (UseCompressedOops) and barrier sets
76 void continuation_stubs_init(); // depend on continuations_init
77 void interpreter_init_stub(); // before any methods loaded
78 void interpreter_init_code(); // after methods loaded, but before they are linked
79 void accessFlags_init();
80 void InterfaceSupport_init();
81 void universe2_init(); // dependent on codeCache_init and initial_stubs_init, loads primordial classes
82 void referenceProcessor_init();
83 void jni_handles_init();
84 void vmStructs_init() NOT_DEBUG_RETURN;
85
86 void vtableStubs_init();
87 bool compilerOracle_init();
88 bool compileBroker_init();
89 void dependencyContext_init();
90 void dependencies_init();
91
92 // Initialization after compiler initialization
93 bool universe_post_init(); // must happen after compiler_init
94 void javaClasses_init(); // must happen after vtable initialization
95 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
96 void final_stubs_init(); // final StubRoutines stubs
97
98 // Do not disable thread-local-storage, as it is important for some
99 // JNI/JVM/JVMTI functions and signal handlers to work properly
100 // during VM shutdown
101 void perfMemory_exit();
102 void ostream_exit();
103
104 void vm_init_globals() {
105 check_ThreadShadow();
106 basic_types_init();
107 eventlog_init();
108 mutex_init();
109 universe_oopstorage_init();
110 perfMemory_init();
111 SuspendibleThreadSet_init();
112 ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
113 }
114
115
116 jint init_globals() {
117 management_init();
118 JvmtiExport::initialize_oop_storage();
119 #if INCLUDE_JVMTI
120 if (AlwaysRecordEvolDependencies) {
121 JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
122 JvmtiExport::set_all_dependencies_are_recorded(true);
123 }
124 #endif
125 bytecodes_init();
126 classLoader_init1();
127 compilationPolicy_init();
128 codeCache_init();
129 VM_Version_init(); // depends on codeCache_init for emitting code
130 VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
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 SharedRuntime::generate_stubs();
160 AOTCodeCache::init_shared_blobs_table(); // need this after generate_stubs
161 SharedRuntime::init_adapter_library(); // do this after AOTCodeCache::init_shared_blobs_table
162 return JNI_OK;
163 }
164
165 jint init_globals2() {
166 universe2_init(); // dependent on codeCache_init and initial_stubs_init
167 javaClasses_init(); // must happen after vtable initialization, before referenceProcessor_init
168 interpreter_init_code(); // after javaClasses_init and before any method gets linked
169 referenceProcessor_init();
170 jni_handles_init();
171 #if INCLUDE_VM_STRUCTS
172 vmStructs_init();
173 #endif // INCLUDE_VM_STRUCTS
174
175 vtableStubs_init();
176 if (!compilerOracle_init()) {
177 return JNI_EINVAL;
178 }
179 dependencyContext_init();
180 dependencies_init();
181
182 if (!compileBroker_init()) {
183 return JNI_EINVAL;
184 }
185 #if INCLUDE_JVMCI
186 if (EnableJVMCI) {
187 JVMCI::initialize_globals();
188 }
189 #endif
190
191 if (!universe_post_init()) {
192 return JNI_ERR;
193 }
194 compiler_stubs_init(false /* in_compiler_thread */); // compiler's intrinsics stubs
195 final_stubs_init(); // final StubRoutines stubs
196 MethodHandles::generate_adapters();
197
198 // All the flags that get adjusted by VM_Version_init and os::init_2
199 // have been set so dump the flags now.
200 if (PrintFlagsFinal || PrintFlagsRanges) {
201 JVMFlag::printFlags(tty, false, PrintFlagsRanges);
202 }
203
204 return JNI_OK;
205 }
206
207
208 void exit_globals() {
209 static bool destructorsCalled = false;
210 if (!destructorsCalled) {
211 destructorsCalled = true;
212 perfMemory_exit();
213 SafepointTracing::statistics_exit_log();
214 if (PrintStringTableStatistics) {
215 SymbolTable::dump(tty);
216 StringTable::dump(tty);
217 }
218 ostream_exit();
219 #ifdef LEAK_SANITIZER
220 {
221 // Unregister the Java heap with LSan.
222 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
223 LSAN_UNREGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
224 }
225 #endif // LEAK_SANITIZER
226 }
227 }
228
229 static volatile bool _init_completed = false;
230
231 bool is_init_completed() {
232 return Atomic::load_acquire(&_init_completed);
233 }
234
235 void wait_init_completed() {
236 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
237 while (!_init_completed) {
238 ml.wait();
239 }
240 }
241
242 void set_init_completed() {
243 assert(Universe::is_fully_initialized(), "Should have completed initialization");
244 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
245 Atomic::release_store(&_init_completed, true);
246 ml.notify_all();
247 }