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