1 /*
  2  * Copyright (c) 1997, 2021, 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 "classfile/stringTable.hpp"
 27 #include "classfile/symbolTable.hpp"
 28 #include "code/icBuffer.hpp"
 29 #include "compiler/compiler_globals.hpp"
 30 #include "gc/shared/collectedHeap.hpp"
 31 #if INCLUDE_JVMCI
 32 #include "jvmci/jvmci.hpp"
 33 #endif
 34 #include "interpreter/bytecodes.hpp"
 35 #include "logging/log.hpp"
 36 #include "logging/logAsyncWriter.hpp"
 37 #include "logging/logTag.hpp"
 38 #include "memory/universe.hpp"
 39 #include "prims/jvmtiExport.hpp"
 40 #include "prims/methodHandles.hpp"
 41 #include "prims/universalNativeInvoker.hpp"
 42 #include "runtime/globals.hpp"
 43 #include "runtime/atomic.hpp"
 44 #include "runtime/continuation.hpp"
 45 #include "runtime/flags/jvmFlag.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 "services/memTracker.hpp"
 52 #include "utilities/macros.hpp"
 53 
 54 
 55 // Initialization done by VM thread in vm_init_globals()
 56 void check_ThreadShadow();
 57 void eventlog_init();
 58 void mutex_init();
 59 void universe_oopstorage_init();
 60 void perfMemory_init();
 61 void SuspendibleThreadSet_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 stubRoutines_init1();
 71 void stubRoutines_initContinuationStubs();
 72 jint universe_init();          // depends on codeCache_init and stubRoutines_init
 73 // depends on universe_init, must be before interpreter_init (currently only on SPARC)
 74 void gc_barrier_stubs_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 stubRoutines_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 void InlineCacheBuffer_init();
 86 void 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 stubRoutines_init2(); // note: StubRoutines need 2-phase init
 95 
 96 void continuations_init(); // depends on flags (UseCompressedOops, LoomGenCode) and barrier sets
 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 }
113 
114 
115 jint init_globals() {
116   management_init();
117   JvmtiExport::initialize_oop_storage();
118   bytecodes_init();
119   classLoader_init1();
120   compilationPolicy_init();
121   codeCache_init();
122   VM_Version_init();              // depends on codeCache_init for emitting code
123   stubRoutines_init1();
124   jint status = universe_init();  // dependent on codeCache_init and
125                                   // stubRoutines_init1 and metaspace_init.
126   if (status != JNI_OK)
127     return status;
128 
129   AsyncLogWriter::initialize();
130   gc_barrier_stubs_init();  // depends on universe_init, must be before interpreter_init
131   stubRoutines_initContinuationStubs();
132   interpreter_init_stub();  // before methods get loaded
133   accessFlags_init();
134   InterfaceSupport_init();
135   VMRegImpl::set_regName(); // need this before generate_stubs (for printing oop maps).
136   SharedRuntime::generate_stubs();
137   universe2_init();  // dependent on codeCache_init and stubRoutines_init1
138   javaClasses_init();// must happen after vtable initialization, before referenceProcessor_init
139   interpreter_init_code();  // after javaClasses_init and before any method gets linked
140   referenceProcessor_init();
141   jni_handles_init();
142 #if INCLUDE_VM_STRUCTS
143   vmStructs_init();
144 #endif // INCLUDE_VM_STRUCTS
145 
146   vtableStubs_init();
147   InlineCacheBuffer_init();
148   compilerOracle_init();
149   dependencyContext_init();
150   dependencies_init();
151 
152   if (!compileBroker_init()) {
153     return JNI_EINVAL;
154   }
155 #if INCLUDE_JVMCI
156   if (EnableJVMCI) {
157     JVMCI::initialize_globals();
158   }
159 #endif
160 
161   if (!universe_post_init()) {
162     return JNI_ERR;
163   }
164   stubRoutines_init2(); // note: StubRoutines need 2-phase init
165   MethodHandles::generate_adapters();
166 
167   continuations_init();
168 
169   // All the flags that get adjusted by VM_Version_init and os::init_2
170   // have been set so dump the flags now.
171   if (PrintFlagsFinal || PrintFlagsRanges) {
172     JVMFlag::printFlags(tty, false, PrintFlagsRanges);
173   }
174 
175 
176   return JNI_OK;
177 }
178 
179 
180 void exit_globals() {
181   static bool destructorsCalled = false;
182   if (!destructorsCalled) {
183     destructorsCalled = true;
184     perfMemory_exit();
185     SafepointTracing::statistics_exit_log();
186     if (PrintStringTableStatistics) {
187       SymbolTable::dump(tty);
188       StringTable::dump(tty);
189     }
190     ostream_exit();
191   }
192 }
193 
194 static volatile bool _init_completed = false;
195 
196 bool is_init_completed() {
197   return Atomic::load_acquire(&_init_completed);
198 }
199 
200 void wait_init_completed() {
201   MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
202   while (!_init_completed) {
203     ml.wait();
204   }
205 }
206 
207 void set_init_completed() {
208   assert(Universe::is_fully_initialized(), "Should have completed initialization");
209   MonitorLocker ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
210   Atomic::release_store(&_init_completed, true);
211   ml.notify_all();
212 }