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 "compiler/compiler_globals.hpp"
28 #include "gc/shared/collectedHeap.hpp"
29 #include "gc/shared/gcHeapSummary.hpp"
30 #include "interpreter/bytecodes.hpp"
31 #include "logging/logAsyncWriter.hpp"
32 #include "memory/universe.hpp"
33 #include "nmt/memTracker.hpp"
34 #include "prims/downcallLinker.hpp"
35 #include "prims/jvmtiExport.hpp"
36 #include "prims/methodHandles.hpp"
37 #include "runtime/atomic.hpp"
38 #include "runtime/continuation.hpp"
39 #include "runtime/flags/jvmFlag.hpp"
40 #include "runtime/globals.hpp"
41 #include "runtime/handles.inline.hpp"
42 #include "runtime/icache.hpp"
43 #include "runtime/init.hpp"
44 #include "runtime/safepoint.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "sanitizers/leak.hpp"
47 #include "utilities/macros.hpp"
48 #if INCLUDE_JVMCI
49 #include "jvmci/jvmci.hpp"
50 #endif
51
52 // Initialization done by VM thread in vm_init_globals()
53 void check_ThreadShadow();
54 void eventlog_init();
55 void mutex_init();
56 void universe_oopstorage_init();
57 void perfMemory_init();
58 void SuspendibleThreadSet_init();
59 void ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
60
61 // Initialization done by Java thread in init_globals()
62 void management_init();
63 void bytecodes_init();
64 void classLoader_init1();
65 void compilationPolicy_init();
66 void codeCache_init();
67 void VM_Version_init();
68 void icache_init2();
69 void initial_stubs_init();
70
71 jint universe_init(); // depends on codeCache_init and initial_stubs_init
72 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
73 void gc_barrier_stubs_init();
74 void continuations_init(); // depends on flags (UseCompressedOops) and barrier sets
75 void continuation_stubs_init(); // depend on continuations_init
76 void interpreter_init_stub(); // before any methods loaded
77 void interpreter_init_code(); // after methods loaded, but before they are linked
78 void accessFlags_init();
79 void InterfaceSupport_init();
80 void universe2_init(); // dependent on codeCache_init and initial_stubs_init, loads primordial classes
81 void referenceProcessor_init();
82 void jni_handles_init();
83 void vmStructs_init() NOT_DEBUG_RETURN;
84
85 void vtableStubs_init();
86 bool compilerOracle_init();
87 bool compileBroker_init();
88 void dependencyContext_init();
89 void dependencies_init();
90
91 // Initialization after compiler initialization
92 bool universe_post_init(); // must happen after compiler_init
93 void javaClasses_init(); // must happen after vtable initialization
94 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
95 void final_stubs_init(); // final StubRoutines stubs
96
97 // Do not disable thread-local-storage, as it is important for some
98 // JNI/JVM/JVMTI functions and signal handlers to work properly
99 // during VM shutdown
100 void perfMemory_exit();
101 void ostream_exit();
102
103 void vm_init_globals() {
104 check_ThreadShadow();
105 basic_types_init();
106 eventlog_init();
107 mutex_init();
108 universe_oopstorage_init();
109 perfMemory_init();
110 SuspendibleThreadSet_init();
111 ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
112 }
113
114
115 jint init_globals() {
116 management_init();
117 JvmtiExport::initialize_oop_storage();
118 #if INCLUDE_JVMTI
119 if (AlwaysRecordEvolDependencies) {
120 JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
121 JvmtiExport::set_all_dependencies_are_recorded(true);
122 }
123 #endif
124 bytecodes_init();
125 classLoader_init1();
126 compilationPolicy_init();
127 codeCache_init();
128 VM_Version_init(); // depends on codeCache_init for emitting code
129 icache_init2(); // depends on VM_Version for choosing the mechanism
130 // stub routines in initial blob are referenced by later generated code
131 initial_stubs_init();
132 // stack overflow exception blob is referenced by the interpreter
133 SharedRuntime::generate_initial_stubs();
134 jint status = universe_init(); // dependent on codeCache_init and
135 // initial_stubs_init and metaspace_init.
136 if (status != JNI_OK)
137 return status;
138
139 #ifdef LEAK_SANITIZER
140 {
141 // Register the Java heap with LSan.
142 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
143 LSAN_REGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
144 }
145 #endif // LEAK_SANITIZER
146
147 AsyncLogWriter::initialize();
148 gc_barrier_stubs_init(); // depends on universe_init, must be before interpreter_init
149 continuations_init(); // must precede continuation stub generation
150 continuation_stubs_init(); // depends on continuations_init
151 #if INCLUDE_JFR
152 SharedRuntime::generate_jfr_stubs();
153 #endif
154 interpreter_init_stub(); // before methods get loaded
155 accessFlags_init();
156 InterfaceSupport_init();
157 VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
158 SharedRuntime::generate_stubs();
159 return JNI_OK;
160 }
161
162 jint init_globals2() {
163 universe2_init(); // dependent on codeCache_init and initial_stubs_init
164 javaClasses_init(); // must happen after vtable initialization, before referenceProcessor_init
165 interpreter_init_code(); // after javaClasses_init and before any method gets linked
166 referenceProcessor_init();
167 jni_handles_init();
168 #if INCLUDE_VM_STRUCTS
169 vmStructs_init();
170 #endif // INCLUDE_VM_STRUCTS
171
172 vtableStubs_init();
173 if (!compilerOracle_init()) {
174 return JNI_EINVAL;
175 }
176 dependencyContext_init();
177 dependencies_init();
178
179 if (!compileBroker_init()) {
180 return JNI_EINVAL;
181 }
182 #if INCLUDE_JVMCI
183 if (EnableJVMCI) {
184 JVMCI::initialize_globals();
185 }
186 #endif
187
188 if (!universe_post_init()) {
189 return JNI_ERR;
190 }
191 compiler_stubs_init(false /* in_compiler_thread */); // compiler's intrinsics stubs
192 final_stubs_init(); // final StubRoutines stubs
193 MethodHandles::generate_adapters();
194
195 // All the flags that get adjusted by VM_Version_init and os::init_2
196 // have been set so dump the flags now.
197 if (PrintFlagsFinal || PrintFlagsRanges) {
198 JVMFlag::printFlags(tty, false, PrintFlagsRanges);
199 }
200
201 return JNI_OK;
202 }
203
204
205 void exit_globals() {
206 static bool destructorsCalled = false;
207 if (!destructorsCalled) {
208 destructorsCalled = true;
209 perfMemory_exit();
210 SafepointTracing::statistics_exit_log();
211 if (PrintStringTableStatistics) {
212 SymbolTable::dump(tty);
213 StringTable::dump(tty);
214 }
215 ostream_exit();
216 #ifdef LEAK_SANITIZER
217 {
218 // Unregister the Java heap with LSan.
219 VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
220 LSAN_UNREGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
221 }
222 #endif // LEAK_SANITIZER
223 }
224 }
225
226 static volatile bool _init_completed = false;
227
228 bool is_init_completed() {
229 return Atomic::load_acquire(&_init_completed);
230 }
231
232 void wait_init_completed() {
233 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
234 while (!_init_completed) {
235 ml.wait();
236 }
237 }
238
239 void set_init_completed() {
240 assert(Universe::is_fully_initialized(), "Should have completed initialization");
241 MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
242 Atomic::release_store(&_init_completed, true);
243 ml.notify_all();
244 }