1 /*
   2  * Copyright (c) 1997, 2012, 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/symbolTable.hpp"
  27 #include "code/icBuffer.hpp"
  28 #include "gc_interface/collectedHeap.hpp"
  29 #include "interpreter/bytecodes.hpp"
  30 #include "memory/universe.hpp"
  31 #include "prims/methodHandles.hpp"
  32 #include "runtime/handles.inline.hpp"
  33 #include "runtime/icache.hpp"
  34 #include "runtime/init.hpp"
  35 #include "runtime/safepoint.hpp"
  36 #include "runtime/sharedRuntime.hpp"
  37 
  38 // Initialization done by VM thread in vm_init_globals()
  39 void check_ThreadShadow();
  40 void eventlog_init();
  41 void mutex_init();
  42 void chunkpool_init();
  43 void perfMemory_init();
  44 
  45 // Initialization done by Java thread in init_globals()
  46 void management_init();
  47 void bytecodes_init();
  48 void classLoader_init();
  49 void codeCache_init();
  50 void VM_Version_init();
  51 void os_init_globals();        // depends on VM_Version_init, before universe_init
  52 void stubRoutines_init1();
  53 jint universe_init();          // depends on codeCache_init and stubRoutines_init
  54 void interpreter_init();       // before any methods loaded
  55 void invocationCounter_init(); // before any methods loaded
  56 void marksweep_init();
  57 void accessFlags_init();
  58 void templateTable_init();
  59 void InterfaceSupport_init();
  60 void universe2_init();  // dependent on codeCache_init and stubRoutines_init, loads primordial classes
  61 void referenceProcessor_init();
  62 void jni_handles_init();
  63 void vmStructs_init();
  64 
  65 void vtableStubs_init();
  66 void InlineCacheBuffer_init();
  67 void compilerOracle_init();
  68 void compilationPolicy_init();
  69 void compileBroker_init();
  70 
  71 // Initialization after compiler initialization
  72 bool universe_post_init();  // must happen after compiler_init
  73 void javaClasses_init();  // must happen after vtable initialization
  74 void stubRoutines_init2(); // note: StubRoutines need 2-phase init
  75 
  76 // Do not disable thread-local-storage, as it is important for some
  77 // JNI/JVM/JVMTI functions and signal handlers to work properly
  78 // during VM shutdown
  79 void perfMemory_exit();
  80 void ostream_exit();
  81 
  82 void vm_init_globals() {
  83   check_ThreadShadow();
  84   basic_types_init();
  85   eventlog_init();
  86   mutex_init();
  87   chunkpool_init();
  88   perfMemory_init();
  89 }
  90 
  91 
  92 jint init_globals() {
  93   HandleMark hm;
  94   management_init();
  95   bytecodes_init();
  96   classLoader_init();
  97   Metaspace::global_initialize(); // must be before codeCache
  98   codeCache_init();
  99   VM_Version_init();
 100   os_init_globals();
 101   stubRoutines_init1();
 102   jint status = universe_init();  // dependent on codeCache_init and
 103                                   // stubRoutines_init1 and metaspace_init.
 104   if (status != JNI_OK)
 105     return status;
 106 
 107   interpreter_init();  // before any methods loaded
 108   invocationCounter_init();  // before any methods loaded
 109   marksweep_init();
 110   accessFlags_init();
 111   templateTable_init();
 112   InterfaceSupport_init();
 113   SharedRuntime::generate_stubs();
 114   universe2_init();  // dependent on codeCache_init and stubRoutines_init1
 115   referenceProcessor_init();
 116   jni_handles_init();
 117 #ifndef VM_STRUCTS_KERNEL
 118   vmStructs_init();
 119 #endif // VM_STRUCTS_KERNEL
 120 
 121   vtableStubs_init();
 122   InlineCacheBuffer_init();
 123   compilerOracle_init();
 124   compilationPolicy_init();
 125   compileBroker_init();
 126   VMRegImpl::set_regName();
 127 
 128   if (!universe_post_init()) {
 129     return JNI_ERR;
 130   }
 131   javaClasses_init();   // must happen after vtable initialization
 132   stubRoutines_init2(); // note: StubRoutines need 2-phase init
 133 
 134   // Although we'd like to, we can't easily do a heap verify
 135   // here because the main thread isn't yet a JavaThread, so
 136   // its TLAB may not be made parseable from the usual interfaces.
 137   if (VerifyBeforeGC && !UseTLAB &&
 138       Universe::heap()->total_collections() >= VerifyGCStartAt) {
 139     Universe::heap()->prepare_for_verify();
 140     Universe::verify();   // make sure we're starting with a clean slate
 141   }
 142 
 143   // All the flags that get adjusted by VM_Version_init and os::init_2
 144   // have been set so dump the flags now.
 145   if (PrintFlagsFinal) {
 146     CommandLineFlags::printFlags(tty, false);
 147   }
 148 
 149   return JNI_OK;
 150 }
 151 
 152 
 153 void exit_globals() {
 154   static bool destructorsCalled = false;
 155   if (!destructorsCalled) {
 156     destructorsCalled = true;
 157     perfMemory_exit();
 158     if (PrintSafepointStatistics) {
 159       // Print the collected safepoint statistics.
 160       SafepointSynchronize::print_stat_on_exit();
 161     }
 162     if (PrintStringTableStatistics) {
 163       SymbolTable::dump(tty);
 164       StringTable::dump(tty);
 165     }
 166     ostream_exit();
 167   }
 168 }
 169 
 170 
 171 static bool _init_completed = false;
 172 
 173 bool is_init_completed() {
 174   return _init_completed;
 175 }
 176 
 177 
 178 void set_init_completed() {
 179   assert(Universe::is_fully_initialized(), "Should have completed initialization");
 180   _init_completed = true;
 181 }