1 /*
  2  * Copyright (c) 1997, 2024, 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 "precompiled.hpp"
 26 #include "cds/metaspaceShared.hpp"
 27 #include "classfile/stringTable.hpp"
 28 #include "classfile/symbolTable.hpp"
 29 #include "classfile/systemDictionary.hpp"
 30 #include "code/SCCache.hpp"
 31 #include "compiler/compiler_globals.hpp"
 32 #include "gc/shared/collectedHeap.hpp"
 33 #include "gc/shared/gcHeapSummary.hpp"
 34 #include "interpreter/bytecodes.hpp"
 35 #include "logging/logAsyncWriter.hpp"
 36 #include "memory/universe.hpp"
 37 #include "nmt/memTracker.hpp"
 38 #include "oops/trainingData.hpp"
 39 #include "prims/downcallLinker.hpp"
 40 #include "prims/jvmtiExport.hpp"
 41 #include "prims/methodHandles.hpp"
 42 #include "runtime/atomic.hpp"
 43 #include "runtime/continuation.hpp"
 44 #include "runtime/flags/jvmFlag.hpp"
 45 #include "runtime/globals.hpp"
 46 #include "runtime/handles.inline.hpp"
 47 #include "runtime/icache.hpp"
 48 #include "runtime/init.hpp"
 49 #include "runtime/safepoint.hpp"
 50 #include "runtime/sharedRuntime.hpp"
 51 #include "sanitizers/leak.hpp"
 52 #include "utilities/macros.hpp"
 53 #include "utilities/xmlstream.hpp"
 54 #if INCLUDE_JVMCI
 55 #include "jvmci/jvmci.hpp"
 56 #endif
 57 
 58 // Initialization done by VM thread in vm_init_globals()
 59 void check_ThreadShadow();
 60 void eventlog_init();
 61 void mutex_init();
 62 void universe_oopstorage_init();
 63 void perfMemory_init();
 64 void SuspendibleThreadSet_init();
 65 void ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
 66 
 67 // Initialization done by Java thread in init_globals()
 68 void management_init();
 69 void bytecodes_init();
 70 void classLoader_init1();
 71 void compilationPolicy_init();
 72 void codeCache_init();
 73 void VM_Version_init();
 74 void initial_stubs_init();
 75 
 76 jint universe_init();           // depends on codeCache_init and initial_stubs_init
 77 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
 78 void gc_barrier_stubs_init();
 79 void continuations_init();      // depends on flags (UseCompressedOops) and barrier sets
 80 void continuation_stubs_init(); // depend on continuations_init
 81 void interpreter_init_stub();   // before any methods loaded
 82 void interpreter_init_code();   // after methods loaded, but before they are linked
 83 void accessFlags_init();
 84 void InterfaceSupport_init();
 85 void universe2_init();  // dependent on codeCache_init and initial_stubs_init, loads primordial classes
 86 void referenceProcessor_init();
 87 void jni_handles_init();
 88 void vmStructs_init() NOT_DEBUG_RETURN;
 89 
 90 void vtableStubs_init();
 91 bool compilerOracle_init();
 92 bool compileBroker_init();
 93 void dependencyContext_init();
 94 void dependencies_init();
 95 
 96 // Initialization after compiler initialization
 97 bool universe_post_init();  // must happen after compiler_init
 98 void javaClasses_init();    // must happen after vtable initialization
 99 void compiler_stubs_init(bool in_compiler_thread); // compiler's StubRoutines stubs
100 void final_stubs_init();    // final StubRoutines stubs
101 
102 // Do not disable thread-local-storage, as it is important for some
103 // JNI/JVM/JVMTI functions and signal handlers to work properly
104 // during VM shutdown
105 void perfMemory_exit();
106 void ostream_exit();
107 
108 void perf_jvm_init();
109 
110 void vm_init_globals() {
111   check_ThreadShadow();
112   basic_types_init();
113   eventlog_init();
114   mutex_init();
115   universe_oopstorage_init();
116   perfMemory_init();
117   SuspendibleThreadSet_init();
118   ExternalsRecorder_init(); // After mutex_init() and before CodeCache_init
119 }
120 
121 
122 jint init_globals() {
123   perf_jvm_init();
124   MethodHandles::init_counters();
125 
126   management_init();
127   JvmtiExport::initialize_oop_storage();
128 #if INCLUDE_JVMTI
129   if (AlwaysRecordEvolDependencies) {
130     JvmtiExport::set_can_hotswap_or_post_breakpoint(true);
131     JvmtiExport::set_all_dependencies_are_recorded(true);
132   }
133 #endif
134   bytecodes_init();
135   classLoader_init1();
136   compilationPolicy_init();
137   MetaspaceShared::open_static_archive();
138   codeCache_init();
139   VM_Version_init();              // depends on codeCache_init for emitting code
140   // stub routines in initial blob are referenced by later generated code
141   initial_stubs_init();
142   // stack overflow exception blob is referenced by the interpreter
143   SharedRuntime::generate_initial_stubs();
144   jint status = universe_init();  // dependent on codeCache_init and
145                                   // initial_stubs_init and metaspace_init.
146   if (status != JNI_OK)
147     return status;
148   SCCache::initialize();
149 #ifdef LEAK_SANITIZER
150   {
151     // Register the Java heap with LSan.
152     VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
153     LSAN_REGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
154   }
155 #endif // LEAK_SANITIZER
156   SCCache::init2();        // depends on universe_init
157   AsyncLogWriter::initialize();
158   gc_barrier_stubs_init();   // depends on universe_init, must be before interpreter_init
159   continuations_init();      // must precede continuation stub generation
160   continuation_stubs_init(); // depends on continuations_init
161 #if INCLUDE_JFR
162   SharedRuntime::generate_jfr_stubs();
163 #endif
164   interpreter_init_stub();   // before methods get loaded
165   accessFlags_init();
166   InterfaceSupport_init();
167   VMRegImpl::set_regName();  // need this before generate_stubs (for printing oop maps).
168   SharedRuntime::generate_stubs();
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   if (TrainingData::have_data() || TrainingData::need_data()) {
199     TrainingData::initialize();
200   }
201 
202   if (!universe_post_init()) {
203     return JNI_ERR;
204   }
205   compiler_stubs_init(false /* in_compiler_thread */); // compiler's intrinsics stubs
206   final_stubs_init();    // final StubRoutines stubs
207   MethodHandles::generate_adapters();
208   SystemDictionary::restore_archived_method_handle_intrinsics();
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   } else if (RecordTraining && xtty != nullptr) {
215     JVMFlag::printFlags(xtty->log_only(), false, PrintFlagsRanges);
216   }
217 
218   return JNI_OK;
219 }
220 
221 
222 void exit_globals() {
223   static bool destructorsCalled = false;
224   if (!destructorsCalled) {
225     destructorsCalled = true;
226     perfMemory_exit();
227     SafepointTracing::statistics_exit_log();
228     if (PrintStringTableStatistics) {
229       SymbolTable::dump(tty);
230       StringTable::dump(tty);
231     }
232     ostream_exit();
233 #ifdef LEAK_SANITIZER
234     {
235       // Unregister the Java heap with LSan.
236       VirtualSpaceSummary summary = Universe::heap()->create_heap_space_summary();
237       LSAN_UNREGISTER_ROOT_REGION(summary.start(), summary.reserved_size());
238     }
239 #endif // LEAK_SANITIZER
240   }
241 }
242 
243 static volatile bool _init_completed = false;
244 
245 bool is_init_completed() {
246   return Atomic::load_acquire(&_init_completed);
247 }
248 
249 void wait_init_completed() {
250   MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
251   while (!_init_completed) {
252     ml.wait();
253   }
254 }
255 
256 void set_init_completed() {
257   assert(Universe::is_fully_initialized(), "Should have completed initialization");
258   MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
259   Atomic::release_store(&_init_completed, true);
260   ml.notify_all();
261 }