rev 7616 : 8067836: The Universe::flush_foo methods belong in CodeCache.
Summary: Move this code to CodeCache.
Reviewed-by: kbarrett, kvn

   1 /*
   2  * Copyright (c) 1997, 2015, 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/classLoader.hpp"
  27 #include "classfile/classLoaderData.hpp"
  28 #include "classfile/javaClasses.hpp"
  29 #include "classfile/stringTable.hpp"
  30 #include "classfile/systemDictionary.hpp"
  31 #include "classfile/vmSymbols.hpp"
  32 #include "code/codeCache.hpp"
  33 #include "code/dependencies.hpp"
  34 #include "gc_interface/collectedHeap.inline.hpp"
  35 #include "interpreter/interpreter.hpp"
  36 #include "memory/cardTableModRefBS.hpp"
  37 #include "memory/filemap.hpp"
  38 #include "memory/gcLocker.inline.hpp"
  39 #include "memory/genCollectedHeap.hpp"
  40 #include "memory/genRemSet.hpp"
  41 #include "memory/generation.hpp"
  42 #include "memory/metadataFactory.hpp"
  43 #include "memory/metaspaceShared.hpp"
  44 #include "memory/oopFactory.hpp"
  45 #include "memory/space.hpp"
  46 #include "memory/universe.hpp"
  47 #include "memory/universe.inline.hpp"
  48 #include "oops/constantPool.hpp"
  49 #include "oops/instanceClassLoaderKlass.hpp"
  50 #include "oops/instanceKlass.hpp"
  51 #include "oops/instanceMirrorKlass.hpp"
  52 #include "oops/instanceRefKlass.hpp"
  53 #include "oops/oop.inline.hpp"
  54 #include "oops/typeArrayKlass.hpp"
  55 #include "prims/jvmtiRedefineClassesTrace.hpp"
  56 #include "runtime/arguments.hpp"
  57 #include "runtime/atomic.inline.hpp"
  58 #include "runtime/deoptimization.hpp"
  59 #include "runtime/fprofiler.hpp"
  60 #include "runtime/handles.inline.hpp"
  61 #include "runtime/init.hpp"
  62 #include "runtime/java.hpp"
  63 #include "runtime/javaCalls.hpp"
  64 #include "runtime/sharedRuntime.hpp"
  65 #include "runtime/synchronizer.hpp"
  66 #include "runtime/thread.inline.hpp"
  67 #include "runtime/timer.hpp"
  68 #include "runtime/vm_operations.hpp"
  69 #include "services/memoryService.hpp"
  70 #include "utilities/copy.hpp"
  71 #include "utilities/events.hpp"
  72 #include "utilities/hashtable.inline.hpp"
  73 #include "utilities/preserveException.hpp"
  74 #include "utilities/macros.hpp"
  75 #if INCLUDE_ALL_GCS
  76 #include "gc_implementation/shared/adaptiveSizePolicy.hpp"
  77 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp"
  78 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  79 #include "gc_implementation/g1/g1CollectorPolicy_ext.hpp"
  80 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
  81 #endif // INCLUDE_ALL_GCS
  82 #if INCLUDE_CDS
  83 #include "classfile/sharedClassUtil.hpp"
  84 #endif
  85 
  86 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  87 
  88 // Known objects
  89 Klass* Universe::_boolArrayKlassObj                 = NULL;
  90 Klass* Universe::_byteArrayKlassObj                 = NULL;
  91 Klass* Universe::_charArrayKlassObj                 = NULL;
  92 Klass* Universe::_intArrayKlassObj                  = NULL;
  93 Klass* Universe::_shortArrayKlassObj                = NULL;
  94 Klass* Universe::_longArrayKlassObj                 = NULL;
  95 Klass* Universe::_singleArrayKlassObj               = NULL;
  96 Klass* Universe::_doubleArrayKlassObj               = NULL;
  97 Klass* Universe::_typeArrayKlassObjs[T_VOID+1]      = { NULL /*, NULL...*/ };
  98 Klass* Universe::_objectArrayKlassObj               = NULL;
  99 oop Universe::_int_mirror                             = NULL;
 100 oop Universe::_float_mirror                           = NULL;
 101 oop Universe::_double_mirror                          = NULL;
 102 oop Universe::_byte_mirror                            = NULL;
 103 oop Universe::_bool_mirror                            = NULL;
 104 oop Universe::_char_mirror                            = NULL;
 105 oop Universe::_long_mirror                            = NULL;
 106 oop Universe::_short_mirror                           = NULL;
 107 oop Universe::_void_mirror                            = NULL;
 108 oop Universe::_mirrors[T_VOID+1]                      = { NULL /*, NULL...*/ };
 109 oop Universe::_main_thread_group                      = NULL;
 110 oop Universe::_system_thread_group                    = NULL;
 111 objArrayOop Universe::_the_empty_class_klass_array    = NULL;
 112 Array<Klass*>* Universe::_the_array_interfaces_array = NULL;
 113 oop Universe::_the_null_string                        = NULL;
 114 oop Universe::_the_min_jint_string                   = NULL;
 115 LatestMethodCache* Universe::_finalizer_register_cache = NULL;
 116 LatestMethodCache* Universe::_loader_addClass_cache    = NULL;
 117 LatestMethodCache* Universe::_pd_implies_cache         = NULL;
 118 oop Universe::_out_of_memory_error_java_heap          = NULL;
 119 oop Universe::_out_of_memory_error_metaspace          = NULL;
 120 oop Universe::_out_of_memory_error_class_metaspace    = NULL;
 121 oop Universe::_out_of_memory_error_array_size         = NULL;
 122 oop Universe::_out_of_memory_error_gc_overhead_limit  = NULL;
 123 oop Universe::_out_of_memory_error_realloc_objects    = NULL;
 124 objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL;
 125 volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0;
 126 bool Universe::_verify_in_progress                    = false;
 127 oop Universe::_null_ptr_exception_instance            = NULL;
 128 oop Universe::_arithmetic_exception_instance          = NULL;
 129 oop Universe::_virtual_machine_error_instance         = NULL;
 130 oop Universe::_vm_exception                           = NULL;
 131 oop Universe::_allocation_context_notification_obj    = NULL;
 132 
 133 Method* Universe::_throw_illegal_access_error         = NULL;
 134 Array<int>* Universe::_the_empty_int_array            = NULL;
 135 Array<u2>* Universe::_the_empty_short_array           = NULL;
 136 Array<Klass*>* Universe::_the_empty_klass_array     = NULL;
 137 Array<Method*>* Universe::_the_empty_method_array   = NULL;
 138 
 139 // These variables are guarded by FullGCALot_lock.
 140 debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;)
 141 debug_only(int Universe::_fullgc_alot_dummy_next      = 0;)
 142 
 143 // Heap
 144 int             Universe::_verify_count = 0;
 145 
 146 int             Universe::_base_vtable_size = 0;
 147 bool            Universe::_bootstrapping = false;
 148 bool            Universe::_fully_initialized = false;
 149 
 150 size_t          Universe::_heap_capacity_at_last_gc;
 151 size_t          Universe::_heap_used_at_last_gc = 0;
 152 
 153 CollectedHeap*  Universe::_collectedHeap = NULL;
 154 
 155 NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true };
 156 NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true };
 157 address Universe::_narrow_ptrs_base;
 158 
 159 void Universe::basic_type_classes_do(void f(Klass*)) {
 160   f(boolArrayKlassObj());
 161   f(byteArrayKlassObj());
 162   f(charArrayKlassObj());
 163   f(intArrayKlassObj());
 164   f(shortArrayKlassObj());
 165   f(longArrayKlassObj());
 166   f(singleArrayKlassObj());
 167   f(doubleArrayKlassObj());
 168 }
 169 
 170 void Universe::oops_do(OopClosure* f, bool do_all) {
 171 
 172   f->do_oop((oop*) &_int_mirror);
 173   f->do_oop((oop*) &_float_mirror);
 174   f->do_oop((oop*) &_double_mirror);
 175   f->do_oop((oop*) &_byte_mirror);
 176   f->do_oop((oop*) &_bool_mirror);
 177   f->do_oop((oop*) &_char_mirror);
 178   f->do_oop((oop*) &_long_mirror);
 179   f->do_oop((oop*) &_short_mirror);
 180   f->do_oop((oop*) &_void_mirror);
 181 
 182   for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
 183     f->do_oop((oop*) &_mirrors[i]);
 184   }
 185   assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking");
 186 
 187   f->do_oop((oop*)&_the_empty_class_klass_array);
 188   f->do_oop((oop*)&_the_null_string);
 189   f->do_oop((oop*)&_the_min_jint_string);
 190   f->do_oop((oop*)&_out_of_memory_error_java_heap);
 191   f->do_oop((oop*)&_out_of_memory_error_metaspace);
 192   f->do_oop((oop*)&_out_of_memory_error_class_metaspace);
 193   f->do_oop((oop*)&_out_of_memory_error_array_size);
 194   f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit);
 195   f->do_oop((oop*)&_out_of_memory_error_realloc_objects);
 196     f->do_oop((oop*)&_preallocated_out_of_memory_error_array);
 197   f->do_oop((oop*)&_null_ptr_exception_instance);
 198   f->do_oop((oop*)&_arithmetic_exception_instance);
 199   f->do_oop((oop*)&_virtual_machine_error_instance);
 200   f->do_oop((oop*)&_main_thread_group);
 201   f->do_oop((oop*)&_system_thread_group);
 202   f->do_oop((oop*)&_vm_exception);
 203   f->do_oop((oop*)&_allocation_context_notification_obj);
 204   debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);)
 205 }
 206 
 207 // Serialize metadata in and out of CDS archive, not oops.
 208 void Universe::serialize(SerializeClosure* f, bool do_all) {
 209 
 210   f->do_ptr((void**)&_boolArrayKlassObj);
 211   f->do_ptr((void**)&_byteArrayKlassObj);
 212   f->do_ptr((void**)&_charArrayKlassObj);
 213   f->do_ptr((void**)&_intArrayKlassObj);
 214   f->do_ptr((void**)&_shortArrayKlassObj);
 215   f->do_ptr((void**)&_longArrayKlassObj);
 216   f->do_ptr((void**)&_singleArrayKlassObj);
 217   f->do_ptr((void**)&_doubleArrayKlassObj);
 218   f->do_ptr((void**)&_objectArrayKlassObj);
 219 
 220   {
 221     for (int i = 0; i < T_VOID+1; i++) {
 222       if (_typeArrayKlassObjs[i] != NULL) {
 223         assert(i >= T_BOOLEAN, "checking");
 224         f->do_ptr((void**)&_typeArrayKlassObjs[i]);
 225       } else if (do_all) {
 226         f->do_ptr((void**)&_typeArrayKlassObjs[i]);
 227       }
 228     }
 229   }
 230 
 231   f->do_ptr((void**)&_the_array_interfaces_array);
 232   f->do_ptr((void**)&_the_empty_int_array);
 233   f->do_ptr((void**)&_the_empty_short_array);
 234   f->do_ptr((void**)&_the_empty_method_array);
 235   f->do_ptr((void**)&_the_empty_klass_array);
 236   _finalizer_register_cache->serialize(f);
 237   _loader_addClass_cache->serialize(f);
 238   _pd_implies_cache->serialize(f);
 239 }
 240 
 241 void Universe::check_alignment(uintx size, uintx alignment, const char* name) {
 242   if (size < alignment || size % alignment != 0) {
 243     vm_exit_during_initialization(
 244       err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment));
 245   }
 246 }
 247 
 248 void initialize_basic_type_klass(Klass* k, TRAPS) {
 249   Klass* ok = SystemDictionary::Object_klass();
 250   if (UseSharedSpaces) {
 251     ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
 252     assert(k->super() == ok, "u3");
 253     k->restore_unshareable_info(loader_data, Handle(), CHECK);
 254   } else {
 255     k->initialize_supers(ok, CHECK);
 256   }
 257   k->append_to_sibling_list();
 258 }
 259 
 260 void Universe::genesis(TRAPS) {
 261   ResourceMark rm;
 262 
 263   { FlagSetting fs(_bootstrapping, true);
 264 
 265     { MutexLocker mc(Compile_lock);
 266 
 267       // determine base vtable size; without that we cannot create the array klasses
 268       compute_base_vtable_size();
 269 
 270       if (!UseSharedSpaces) {
 271         _boolArrayKlassObj      = TypeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK);
 272         _charArrayKlassObj      = TypeArrayKlass::create_klass(T_CHAR,    sizeof(jchar),    CHECK);
 273         _singleArrayKlassObj    = TypeArrayKlass::create_klass(T_FLOAT,   sizeof(jfloat),   CHECK);
 274         _doubleArrayKlassObj    = TypeArrayKlass::create_klass(T_DOUBLE,  sizeof(jdouble),  CHECK);
 275         _byteArrayKlassObj      = TypeArrayKlass::create_klass(T_BYTE,    sizeof(jbyte),    CHECK);
 276         _shortArrayKlassObj     = TypeArrayKlass::create_klass(T_SHORT,   sizeof(jshort),   CHECK);
 277         _intArrayKlassObj       = TypeArrayKlass::create_klass(T_INT,     sizeof(jint),     CHECK);
 278         _longArrayKlassObj      = TypeArrayKlass::create_klass(T_LONG,    sizeof(jlong),    CHECK);
 279 
 280         _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj;
 281         _typeArrayKlassObjs[T_CHAR]    = _charArrayKlassObj;
 282         _typeArrayKlassObjs[T_FLOAT]   = _singleArrayKlassObj;
 283         _typeArrayKlassObjs[T_DOUBLE]  = _doubleArrayKlassObj;
 284         _typeArrayKlassObjs[T_BYTE]    = _byteArrayKlassObj;
 285         _typeArrayKlassObjs[T_SHORT]   = _shortArrayKlassObj;
 286         _typeArrayKlassObjs[T_INT]     = _intArrayKlassObj;
 287         _typeArrayKlassObjs[T_LONG]    = _longArrayKlassObj;
 288 
 289         ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data();
 290 
 291         _the_array_interfaces_array = MetadataFactory::new_array<Klass*>(null_cld, 2, NULL, CHECK);
 292         _the_empty_int_array        = MetadataFactory::new_array<int>(null_cld, 0, CHECK);
 293         _the_empty_short_array      = MetadataFactory::new_array<u2>(null_cld, 0, CHECK);
 294         _the_empty_method_array     = MetadataFactory::new_array<Method*>(null_cld, 0, CHECK);
 295         _the_empty_klass_array      = MetadataFactory::new_array<Klass*>(null_cld, 0, CHECK);
 296       }
 297     }
 298 
 299     vmSymbols::initialize(CHECK);
 300 
 301     SystemDictionary::initialize(CHECK);
 302 
 303     Klass* ok = SystemDictionary::Object_klass();
 304 
 305     _the_null_string            = StringTable::intern("null", CHECK);
 306     _the_min_jint_string       = StringTable::intern("-2147483648", CHECK);
 307 
 308     if (UseSharedSpaces) {
 309       // Verify shared interfaces array.
 310       assert(_the_array_interfaces_array->at(0) ==
 311              SystemDictionary::Cloneable_klass(), "u3");
 312       assert(_the_array_interfaces_array->at(1) ==
 313              SystemDictionary::Serializable_klass(), "u3");
 314     } else {
 315       // Set up shared interfaces array.  (Do this before supers are set up.)
 316       _the_array_interfaces_array->at_put(0, SystemDictionary::Cloneable_klass());
 317       _the_array_interfaces_array->at_put(1, SystemDictionary::Serializable_klass());
 318     }
 319 
 320     initialize_basic_type_klass(boolArrayKlassObj(), CHECK);
 321     initialize_basic_type_klass(charArrayKlassObj(), CHECK);
 322     initialize_basic_type_klass(singleArrayKlassObj(), CHECK);
 323     initialize_basic_type_klass(doubleArrayKlassObj(), CHECK);
 324     initialize_basic_type_klass(byteArrayKlassObj(), CHECK);
 325     initialize_basic_type_klass(shortArrayKlassObj(), CHECK);
 326     initialize_basic_type_klass(intArrayKlassObj(), CHECK);
 327     initialize_basic_type_klass(longArrayKlassObj(), CHECK);
 328   } // end of core bootstrapping
 329 
 330   // Maybe this could be lifted up now that object array can be initialized
 331   // during the bootstrapping.
 332 
 333   // OLD
 334   // Initialize _objectArrayKlass after core bootstraping to make
 335   // sure the super class is set up properly for _objectArrayKlass.
 336   // ---
 337   // NEW
 338   // Since some of the old system object arrays have been converted to
 339   // ordinary object arrays, _objectArrayKlass will be loaded when
 340   // SystemDictionary::initialize(CHECK); is run. See the extra check
 341   // for Object_klass_loaded in objArrayKlassKlass::allocate_objArray_klass_impl.
 342   _objectArrayKlassObj = InstanceKlass::
 343     cast(SystemDictionary::Object_klass())->array_klass(1, CHECK);
 344   // OLD
 345   // Add the class to the class hierarchy manually to make sure that
 346   // its vtable is initialized after core bootstrapping is completed.
 347   // ---
 348   // New
 349   // Have already been initialized.
 350   _objectArrayKlassObj->append_to_sibling_list();
 351 
 352   // Compute is_jdk version flags.
 353   // Only 1.3 or later has the java.lang.Shutdown class.
 354   // Only 1.4 or later has the java.lang.CharSequence interface.
 355   // Only 1.5 or later has the java.lang.management.MemoryUsage class.
 356   if (JDK_Version::is_partially_initialized()) {
 357     uint8_t jdk_version;
 358     Klass* k = SystemDictionary::resolve_or_null(
 359         vmSymbols::java_lang_management_MemoryUsage(), THREAD);
 360     CLEAR_PENDING_EXCEPTION; // ignore exceptions
 361     if (k == NULL) {
 362       k = SystemDictionary::resolve_or_null(
 363           vmSymbols::java_lang_CharSequence(), THREAD);
 364       CLEAR_PENDING_EXCEPTION; // ignore exceptions
 365       if (k == NULL) {
 366         k = SystemDictionary::resolve_or_null(
 367             vmSymbols::java_lang_Shutdown(), THREAD);
 368         CLEAR_PENDING_EXCEPTION; // ignore exceptions
 369         if (k == NULL) {
 370           jdk_version = 2;
 371         } else {
 372           jdk_version = 3;
 373         }
 374       } else {
 375         jdk_version = 4;
 376       }
 377     } else {
 378       jdk_version = 5;
 379     }
 380     JDK_Version::fully_initialize(jdk_version);
 381   }
 382 
 383   #ifdef ASSERT
 384   if (FullGCALot) {
 385     // Allocate an array of dummy objects.
 386     // We'd like these to be at the bottom of the old generation,
 387     // so that when we free one and then collect,
 388     // (almost) the whole heap moves
 389     // and we find out if we actually update all the oops correctly.
 390     // But we can't allocate directly in the old generation,
 391     // so we allocate wherever, and hope that the first collection
 392     // moves these objects to the bottom of the old generation.
 393     // We can allocate directly in the permanent generation, so we do.
 394     int size;
 395     if (UseConcMarkSweepGC) {
 396       warning("Using +FullGCALot with concurrent mark sweep gc "
 397               "will not force all objects to relocate");
 398       size = FullGCALotDummies;
 399     } else {
 400       size = FullGCALotDummies * 2;
 401     }
 402     objArrayOop    naked_array = oopFactory::new_objArray(SystemDictionary::Object_klass(), size, CHECK);
 403     objArrayHandle dummy_array(THREAD, naked_array);
 404     int i = 0;
 405     while (i < size) {
 406         // Allocate dummy in old generation
 407       oop dummy = InstanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK);
 408       dummy_array->obj_at_put(i++, dummy);
 409     }
 410     {
 411       // Only modify the global variable inside the mutex.
 412       // If we had a race to here, the other dummy_array instances
 413       // and their elements just get dropped on the floor, which is fine.
 414       MutexLocker ml(FullGCALot_lock);
 415       if (_fullgc_alot_dummy_array == NULL) {
 416         _fullgc_alot_dummy_array = dummy_array();
 417       }
 418     }
 419     assert(i == _fullgc_alot_dummy_array->length(), "just checking");
 420   }
 421   #endif
 422 
 423   // Initialize dependency array for null class loader
 424   ClassLoaderData::the_null_class_loader_data()->init_dependencies(CHECK);
 425 
 426 }
 427 
 428 // CDS support for patching vtables in metadata in the shared archive.
 429 // All types inherited from Metadata have vtables, but not types inherited
 430 // from MetaspaceObj, because the latter does not have virtual functions.
 431 // If the metadata type has a vtable, it cannot be shared in the read-only
 432 // section of the CDS archive, because the vtable pointer is patched.
 433 static inline void add_vtable(void** list, int* n, void* o, int count) {
 434   guarantee((*n) < count, "vtable list too small");
 435   void* vtable = dereference_vptr(o);
 436   assert(*(void**)(vtable) != NULL, "invalid vtable");
 437   list[(*n)++] = vtable;
 438 }
 439 
 440 void Universe::init_self_patching_vtbl_list(void** list, int count) {
 441   int n = 0;
 442   { InstanceKlass o;          add_vtable(list, &n, &o, count); }
 443   { InstanceClassLoaderKlass o; add_vtable(list, &n, &o, count); }
 444   { InstanceMirrorKlass o;    add_vtable(list, &n, &o, count); }
 445   { InstanceRefKlass o;       add_vtable(list, &n, &o, count); }
 446   { TypeArrayKlass o;         add_vtable(list, &n, &o, count); }
 447   { ObjArrayKlass o;          add_vtable(list, &n, &o, count); }
 448   { Method o;                 add_vtable(list, &n, &o, count); }
 449   { ConstantPool o;           add_vtable(list, &n, &o, count); }
 450 }
 451 
 452 void Universe::initialize_basic_type_mirrors(TRAPS) {
 453     assert(_int_mirror==NULL, "basic type mirrors already initialized");
 454     _int_mirror     =
 455       java_lang_Class::create_basic_type_mirror("int",    T_INT, CHECK);
 456     _float_mirror   =
 457       java_lang_Class::create_basic_type_mirror("float",  T_FLOAT,   CHECK);
 458     _double_mirror  =
 459       java_lang_Class::create_basic_type_mirror("double", T_DOUBLE,  CHECK);
 460     _byte_mirror    =
 461       java_lang_Class::create_basic_type_mirror("byte",   T_BYTE, CHECK);
 462     _bool_mirror    =
 463       java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK);
 464     _char_mirror    =
 465       java_lang_Class::create_basic_type_mirror("char",   T_CHAR, CHECK);
 466     _long_mirror    =
 467       java_lang_Class::create_basic_type_mirror("long",   T_LONG, CHECK);
 468     _short_mirror   =
 469       java_lang_Class::create_basic_type_mirror("short",  T_SHORT,   CHECK);
 470     _void_mirror    =
 471       java_lang_Class::create_basic_type_mirror("void",   T_VOID, CHECK);
 472 
 473     _mirrors[T_INT]     = _int_mirror;
 474     _mirrors[T_FLOAT]   = _float_mirror;
 475     _mirrors[T_DOUBLE]  = _double_mirror;
 476     _mirrors[T_BYTE]    = _byte_mirror;
 477     _mirrors[T_BOOLEAN] = _bool_mirror;
 478     _mirrors[T_CHAR]    = _char_mirror;
 479     _mirrors[T_LONG]    = _long_mirror;
 480     _mirrors[T_SHORT]   = _short_mirror;
 481     _mirrors[T_VOID]    = _void_mirror;
 482   //_mirrors[T_OBJECT]  = InstanceKlass::cast(_object_klass)->java_mirror();
 483   //_mirrors[T_ARRAY]   = InstanceKlass::cast(_object_klass)->java_mirror();
 484 }
 485 
 486 void Universe::fixup_mirrors(TRAPS) {
 487   // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly,
 488   // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply
 489   // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note
 490   // that the number of objects allocated at this point is very small.
 491   assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded");
 492   HandleMark hm(THREAD);
 493   // Cache the start of the static fields
 494   InstanceMirrorKlass::init_offset_of_static_fields();
 495 
 496   GrowableArray <Klass*>* list = java_lang_Class::fixup_mirror_list();
 497   int list_length = list->length();
 498   for (int i = 0; i < list_length; i++) {
 499     Klass* k = list->at(i);
 500     assert(k->is_klass(), "List should only hold classes");
 501     EXCEPTION_MARK;
 502     KlassHandle kh(THREAD, k);
 503     java_lang_Class::fixup_mirror(kh, CATCH);
 504 }
 505   delete java_lang_Class::fixup_mirror_list();
 506   java_lang_Class::set_fixup_mirror_list(NULL);
 507 }
 508 
 509 static bool has_run_finalizers_on_exit = false;
 510 
 511 void Universe::run_finalizers_on_exit() {
 512   if (has_run_finalizers_on_exit) return;
 513   has_run_finalizers_on_exit = true;
 514 
 515   // Called on VM exit. This ought to be run in a separate thread.
 516   if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit");
 517   {
 518     PRESERVE_EXCEPTION_MARK;
 519     KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass());
 520     JavaValue result(T_VOID);
 521     JavaCalls::call_static(
 522       &result,
 523       finalizer_klass,
 524       vmSymbols::run_finalizers_on_exit_name(),
 525       vmSymbols::void_method_signature(),
 526       THREAD
 527     );
 528     // Ignore any pending exceptions
 529     CLEAR_PENDING_EXCEPTION;
 530   }
 531 }
 532 
 533 
 534 // initialize_vtable could cause gc if
 535 // 1) we specified true to initialize_vtable and
 536 // 2) this ran after gc was enabled
 537 // In case those ever change we use handles for oops
 538 void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) {
 539   // init vtable of k and all subclasses
 540   Klass* ko = k_h();
 541   klassVtable* vt = ko->vtable();
 542   if (vt) vt->initialize_vtable(false, CHECK);
 543   if (ko->oop_is_instance()) {
 544     InstanceKlass* ik = (InstanceKlass*)ko;
 545     for (KlassHandle s_h(THREAD, ik->subklass());
 546          s_h() != NULL;
 547          s_h = KlassHandle(THREAD, s_h()->next_sibling())) {
 548       reinitialize_vtable_of(s_h, CHECK);
 549     }
 550   }
 551 }
 552 
 553 
 554 void initialize_itable_for_klass(Klass* k, TRAPS) {
 555   InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK);
 556 }
 557 
 558 
 559 void Universe::reinitialize_itables(TRAPS) {
 560   SystemDictionary::classes_do(initialize_itable_for_klass, CHECK);
 561 
 562 }
 563 
 564 
 565 bool Universe::on_page_boundary(void* addr) {
 566   return ((uintptr_t) addr) % os::vm_page_size() == 0;
 567 }
 568 
 569 
 570 bool Universe::should_fill_in_stack_trace(Handle throwable) {
 571   // never attempt to fill in the stack trace of preallocated errors that do not have
 572   // backtrace. These errors are kept alive forever and may be "re-used" when all
 573   // preallocated errors with backtrace have been consumed. Also need to avoid
 574   // a potential loop which could happen if an out of memory occurs when attempting
 575   // to allocate the backtrace.
 576   return ((throwable() != Universe::_out_of_memory_error_java_heap) &&
 577           (throwable() != Universe::_out_of_memory_error_metaspace)  &&
 578           (throwable() != Universe::_out_of_memory_error_class_metaspace)  &&
 579           (throwable() != Universe::_out_of_memory_error_array_size) &&
 580           (throwable() != Universe::_out_of_memory_error_gc_overhead_limit) &&
 581           (throwable() != Universe::_out_of_memory_error_realloc_objects));
 582 }
 583 
 584 
 585 oop Universe::gen_out_of_memory_error(oop default_err) {
 586   // generate an out of memory error:
 587   // - if there is a preallocated error with backtrace available then return it wth
 588   //   a filled in stack trace.
 589   // - if there are no preallocated errors with backtrace available then return
 590   //   an error without backtrace.
 591   int next;
 592   if (_preallocated_out_of_memory_error_avail_count > 0) {
 593     next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count);
 594     assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt");
 595   } else {
 596     next = -1;
 597   }
 598   if (next < 0) {
 599     // all preallocated errors have been used.
 600     // return default
 601     return default_err;
 602   } else {
 603     // get the error object at the slot and set set it to NULL so that the
 604     // array isn't keeping it alive anymore.
 605     oop exc = preallocated_out_of_memory_errors()->obj_at(next);
 606     assert(exc != NULL, "slot has been used already");
 607     preallocated_out_of_memory_errors()->obj_at_put(next, NULL);
 608 
 609     // use the message from the default error
 610     oop msg = java_lang_Throwable::message(default_err);
 611     assert(msg != NULL, "no message");
 612     java_lang_Throwable::set_message(exc, msg);
 613 
 614     // populate the stack trace and return it.
 615     java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc);
 616     return exc;
 617   }
 618 }
 619 
 620 intptr_t Universe::_non_oop_bits = 0;
 621 
 622 void* Universe::non_oop_word() {
 623   // Neither the high bits nor the low bits of this value is allowed
 624   // to look like (respectively) the high or low bits of a real oop.
 625   //
 626   // High and low are CPU-specific notions, but low always includes
 627   // the low-order bit.  Since oops are always aligned at least mod 4,
 628   // setting the low-order bit will ensure that the low half of the
 629   // word will never look like that of a real oop.
 630   //
 631   // Using the OS-supplied non-memory-address word (usually 0 or -1)
 632   // will take care of the high bits, however many there are.
 633 
 634   if (_non_oop_bits == 0) {
 635     _non_oop_bits = (intptr_t)os::non_memory_address_word() | 1;
 636   }
 637 
 638   return (void*)_non_oop_bits;
 639 }
 640 
 641 jint universe_init() {
 642   assert(!Universe::_fully_initialized, "called after initialize_vtables");
 643   guarantee(1 << LogHeapWordSize == sizeof(HeapWord),
 644          "LogHeapWordSize is incorrect.");
 645   guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?");
 646   guarantee(sizeof(oop) % sizeof(HeapWord) == 0,
 647             "oop size is not not a multiple of HeapWord size");
 648   TraceTime timer("Genesis", TraceStartupTime);
 649   JavaClasses::compute_hard_coded_offsets();
 650 
 651   jint status = Universe::initialize_heap();
 652   if (status != JNI_OK) {
 653     return status;
 654   }
 655 
 656   Metaspace::global_initialize();
 657 
 658   // Create memory for metadata.  Must be after initializing heap for
 659   // DumpSharedSpaces.
 660   ClassLoaderData::init_null_class_loader_data();
 661 
 662   // We have a heap so create the Method* caches before
 663   // Metaspace::initialize_shared_spaces() tries to populate them.
 664   Universe::_finalizer_register_cache = new LatestMethodCache();
 665   Universe::_loader_addClass_cache    = new LatestMethodCache();
 666   Universe::_pd_implies_cache         = new LatestMethodCache();
 667 
 668   if (UseSharedSpaces) {
 669     // Read the data structures supporting the shared spaces (shared
 670     // system dictionary, symbol table, etc.).  After that, access to
 671     // the file (other than the mapped regions) is no longer needed, and
 672     // the file is closed. Closing the file does not affect the
 673     // currently mapped regions.
 674     MetaspaceShared::initialize_shared_spaces();
 675     StringTable::create_table();
 676   } else {
 677     SymbolTable::create_table();
 678     StringTable::create_table();
 679     ClassLoader::create_package_info_table();
 680 
 681     if (DumpSharedSpaces) {
 682       MetaspaceShared::prepare_for_dumping();
 683     }
 684   }
 685 
 686   return JNI_OK;
 687 }
 688 
 689 // Choose the heap base address and oop encoding mode
 690 // when compressed oops are used:
 691 // Unscaled  - Use 32-bits oops without encoding when
 692 //     NarrowOopHeapBaseMin + heap_size < 4Gb
 693 // ZeroBased - Use zero based compressed oops with encoding when
 694 //     NarrowOopHeapBaseMin + heap_size < 32Gb
 695 // HeapBased - Use compressed oops with heap base + encoding.
 696 
 697 jint Universe::initialize_heap() {
 698 
 699   if (UseParallelGC) {
 700 #if INCLUDE_ALL_GCS
 701     Universe::_collectedHeap = new ParallelScavengeHeap();
 702 #else  // INCLUDE_ALL_GCS
 703     fatal("UseParallelGC not supported in this VM.");
 704 #endif // INCLUDE_ALL_GCS
 705 
 706   } else if (UseG1GC) {
 707 #if INCLUDE_ALL_GCS
 708     G1CollectorPolicyExt* g1p = new G1CollectorPolicyExt();
 709     g1p->initialize_all();
 710     G1CollectedHeap* g1h = new G1CollectedHeap(g1p);
 711     Universe::_collectedHeap = g1h;
 712 #else  // INCLUDE_ALL_GCS
 713     fatal("UseG1GC not supported in java kernel vm.");
 714 #endif // INCLUDE_ALL_GCS
 715 
 716   } else {
 717     GenCollectorPolicy *gc_policy;
 718 
 719     if (UseSerialGC) {
 720       gc_policy = new MarkSweepPolicy();
 721     } else if (UseConcMarkSweepGC) {
 722 #if INCLUDE_ALL_GCS
 723       gc_policy = new ConcurrentMarkSweepPolicy();
 724 #else  // INCLUDE_ALL_GCS
 725       fatal("UseConcMarkSweepGC not supported in this VM.");
 726 #endif // INCLUDE_ALL_GCS
 727     } else { // default old generation
 728       gc_policy = new MarkSweepPolicy();
 729     }
 730     gc_policy->initialize_all();
 731 
 732     Universe::_collectedHeap = new GenCollectedHeap(gc_policy);
 733   }
 734 
 735   ThreadLocalAllocBuffer::set_max_size(Universe::heap()->max_tlab_size());
 736 
 737   jint status = Universe::heap()->initialize();
 738   if (status != JNI_OK) {
 739     return status;
 740   }
 741 
 742 #ifdef _LP64
 743   if (UseCompressedOops) {
 744     // Subtract a page because something can get allocated at heap base.
 745     // This also makes implicit null checking work, because the
 746     // memory+1 page below heap_base needs to cause a signal.
 747     // See needs_explicit_null_check.
 748     // Only set the heap base for compressed oops because it indicates
 749     // compressed oops for pstack code.
 750     if ((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) {
 751       // Didn't reserve heap below 4Gb.  Must shift.
 752       Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
 753     }
 754     if ((uint64_t)Universe::heap()->reserved_region().end() <= OopEncodingHeapMax) {
 755       // Did reserve heap below 32Gb. Can use base == 0;
 756       Universe::set_narrow_oop_base(0);
 757     }
 758 
 759     Universe::set_narrow_ptrs_base(Universe::narrow_oop_base());
 760 
 761     if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
 762       Universe::print_compressed_oops_mode();
 763     }
 764 
 765     // Tell tests in which mode we run.
 766     Arguments::PropertyList_add(new SystemProperty("java.vm.compressedOopsMode",
 767                                                    narrow_oop_mode_to_string(narrow_oop_mode()),
 768                                                    false));
 769   }
 770   // Universe::narrow_oop_base() is one page below the heap.
 771   assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() -
 772          os::vm_page_size()) ||
 773          Universe::narrow_oop_base() == NULL, "invalid value");
 774   assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes ||
 775          Universe::narrow_oop_shift() == 0, "invalid value");
 776 #endif
 777 
 778   // We will never reach the CATCH below since Exceptions::_throw will cause
 779   // the VM to exit if an exception is thrown during initialization
 780 
 781   if (UseTLAB) {
 782     assert(Universe::heap()->supports_tlab_allocation(),
 783            "Should support thread-local allocation buffers");
 784     ThreadLocalAllocBuffer::startup_initialization();
 785   }
 786   return JNI_OK;
 787 }
 788 
 789 void Universe::print_compressed_oops_mode() {
 790   tty->cr();
 791   tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB",
 792               Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M);
 793 
 794   tty->print(", Compressed Oops mode: %s", narrow_oop_mode_to_string(narrow_oop_mode()));
 795 
 796   if (Universe::narrow_oop_base() != 0) {
 797     tty->print(": " PTR_FORMAT, Universe::narrow_oop_base());
 798   }
 799 
 800   if (Universe::narrow_oop_shift() != 0) {
 801     tty->print(", Oop shift amount: %d", Universe::narrow_oop_shift());
 802   }
 803 
 804   if (!Universe::narrow_oop_use_implicit_null_checks()) {
 805     tty->print(", no protected page in front of the heap");
 806   }
 807 
 808   tty->cr();
 809   tty->cr();
 810 }
 811 
 812 ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) {
 813 
 814   assert(alignment <= Arguments::conservative_max_heap_alignment(),
 815       err_msg("actual alignment "SIZE_FORMAT" must be within maximum heap alignment "SIZE_FORMAT,
 816           alignment, Arguments::conservative_max_heap_alignment()));
 817 
 818   size_t total_reserved = align_size_up(heap_size, alignment);
 819   assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())),
 820       "heap size is too big for compressed oops");
 821 
 822   bool use_large_pages = UseLargePages && is_size_aligned(alignment, os::large_page_size());
 823   assert(!UseLargePages
 824       || UseParallelGC
 825       || use_large_pages, "Wrong alignment to use large pages");
 826 
 827   // Now create the space.
 828   ReservedHeapSpace total_rs(total_reserved, alignment, use_large_pages);
 829 
 830   if (total_rs.is_reserved()) {
 831     assert((total_reserved == total_rs.size()) && ((uintptr_t)total_rs.base() % alignment == 0),
 832            "must be exactly of required size and alignment");
 833     // We are good.
 834 
 835     if (UseCompressedOops) {
 836       // Universe::initialize_heap() will reset this to NULL if unscaled
 837       // or zero-based narrow oops are actually used.
 838       // Else heap start and base MUST differ, so that NULL can be encoded nonambigous.
 839       Universe::set_narrow_oop_base((address)total_rs.compressed_oop_base());
 840     }
 841 
 842     return total_rs;
 843   }
 844 
 845   vm_exit_during_initialization(
 846     err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap",
 847             total_reserved/K));
 848 
 849   // satisfy compiler
 850   ShouldNotReachHere();
 851   return ReservedHeapSpace(0, 0, false);
 852 }
 853 
 854 
 855 // It's the caller's responsibility to ensure glitch-freedom
 856 // (if required).
 857 void Universe::update_heap_info_at_gc() {
 858   _heap_capacity_at_last_gc = heap()->capacity();
 859   _heap_used_at_last_gc     = heap()->used();
 860 }
 861 
 862 
 863 const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) {
 864   switch (mode) {
 865     case UnscaledNarrowOop:
 866       return "32-bit";
 867     case ZeroBasedNarrowOop:
 868       return "Zero based";
 869     case DisjointBaseNarrowOop:
 870       return "Non-zero disjoint base";
 871     case HeapBasedNarrowOop:
 872       return "Non-zero based";
 873   }
 874 
 875   ShouldNotReachHere();
 876   return "";
 877 }
 878 
 879 
 880 Universe::NARROW_OOP_MODE Universe::narrow_oop_mode() {
 881   if (narrow_oop_base_disjoint()) {
 882     return DisjointBaseNarrowOop;
 883   }
 884 
 885   if (narrow_oop_base() != 0) {
 886     return HeapBasedNarrowOop;
 887   }
 888 
 889   if (narrow_oop_shift() != 0) {
 890     return ZeroBasedNarrowOop;
 891   }
 892 
 893   return UnscaledNarrowOop;
 894 }
 895 
 896 
 897 void universe2_init() {
 898   EXCEPTION_MARK;
 899   Universe::genesis(CATCH);
 900 }
 901 
 902 
 903 bool universe_post_init() {
 904   assert(!is_init_completed(), "Error: initialization not yet completed!");
 905   Universe::_fully_initialized = true;
 906   EXCEPTION_MARK;
 907   { ResourceMark rm;
 908     Interpreter::initialize();      // needed for interpreter entry points
 909     if (!UseSharedSpaces) {
 910       HandleMark hm(THREAD);
 911       KlassHandle ok_h(THREAD, SystemDictionary::Object_klass());
 912       Universe::reinitialize_vtable_of(ok_h, CHECK_false);
 913       Universe::reinitialize_itables(CHECK_false);
 914     }
 915   }
 916 
 917   HandleMark hm(THREAD);
 918   Klass* k;
 919   instanceKlassHandle k_h;
 920     // Setup preallocated empty java.lang.Class array
 921     Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false);
 922 
 923     // Setup preallocated OutOfMemoryError errors
 924     k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false);
 925     k_h = instanceKlassHandle(THREAD, k);
 926     Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false);
 927     Universe::_out_of_memory_error_metaspace = k_h->allocate_instance(CHECK_false);
 928     Universe::_out_of_memory_error_class_metaspace = k_h->allocate_instance(CHECK_false);
 929     Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false);
 930     Universe::_out_of_memory_error_gc_overhead_limit =
 931       k_h->allocate_instance(CHECK_false);
 932     Universe::_out_of_memory_error_realloc_objects = k_h->allocate_instance(CHECK_false);
 933 
 934     // Setup preallocated NullPointerException
 935     // (this is currently used for a cheap & dirty solution in compiler exception handling)
 936     k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false);
 937     Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false);
 938     // Setup preallocated ArithmeticException
 939     // (this is currently used for a cheap & dirty solution in compiler exception handling)
 940     k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false);
 941     Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false);
 942     // Virtual Machine Error for when we get into a situation we can't resolve
 943     k = SystemDictionary::resolve_or_fail(
 944       vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false);
 945     bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false);
 946     if (!linked) {
 947       tty->print_cr("Unable to link/verify VirtualMachineError class");
 948       return false; // initialization failed
 949     }
 950     Universe::_virtual_machine_error_instance =
 951       InstanceKlass::cast(k)->allocate_instance(CHECK_false);
 952 
 953     Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false);
 954 
 955   if (!DumpSharedSpaces) {
 956     // These are the only Java fields that are currently set during shared space dumping.
 957     // We prefer to not handle this generally, so we always reinitialize these detail messages.
 958     Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false);
 959     java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg());
 960 
 961     msg = java_lang_String::create_from_str("Metaspace", CHECK_false);
 962     java_lang_Throwable::set_message(Universe::_out_of_memory_error_metaspace, msg());
 963     msg = java_lang_String::create_from_str("Compressed class space", CHECK_false);
 964     java_lang_Throwable::set_message(Universe::_out_of_memory_error_class_metaspace, msg());
 965 
 966     msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false);
 967     java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg());
 968 
 969     msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false);
 970     java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg());
 971 
 972     msg = java_lang_String::create_from_str("Java heap space: failed reallocation of scalar replaced objects", CHECK_false);
 973     java_lang_Throwable::set_message(Universe::_out_of_memory_error_realloc_objects, msg());
 974 
 975     msg = java_lang_String::create_from_str("/ by zero", CHECK_false);
 976     java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg());
 977 
 978     // Setup the array of errors that have preallocated backtrace
 979     k = Universe::_out_of_memory_error_java_heap->klass();
 980     assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error");
 981     k_h = instanceKlassHandle(THREAD, k);
 982 
 983     int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0;
 984     Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false);
 985     for (int i=0; i<len; i++) {
 986       oop err = k_h->allocate_instance(CHECK_false);
 987       Handle err_h = Handle(THREAD, err);
 988       java_lang_Throwable::allocate_backtrace(err_h, CHECK_false);
 989       Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h());
 990     }
 991     Universe::_preallocated_out_of_memory_error_avail_count = (jint)len;
 992   }
 993 
 994 
 995   // Setup static method for registering finalizers
 996   // The finalizer klass must be linked before looking up the method, in
 997   // case it needs to get rewritten.
 998   InstanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false);
 999   Method* m = InstanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method(
1000                                   vmSymbols::register_method_name(),
1001                                   vmSymbols::register_method_signature());
1002   if (m == NULL || !m->is_static()) {
1003     tty->print_cr("Unable to link/verify Finalizer.register method");
1004     return false; // initialization failed (cannot throw exception yet)
1005   }
1006   Universe::_finalizer_register_cache->init(
1007     SystemDictionary::Finalizer_klass(), m);
1008 
1009   InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->link_class(CHECK_false);
1010   m = InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->find_method(
1011                                   vmSymbols::throwIllegalAccessError_name(),
1012                                   vmSymbols::void_method_signature());
1013   if (m != NULL && !m->is_static()) {
1014     // Note null is okay; this method is used in itables, and if it is null,
1015     // then AbstractMethodError is thrown instead.
1016     tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method");
1017     return false; // initialization failed (cannot throw exception yet)
1018   }
1019   Universe::_throw_illegal_access_error = m;
1020 
1021   // Setup method for registering loaded classes in class loader vector
1022   InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false);
1023   m = InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature());
1024   if (m == NULL || m->is_static()) {
1025     tty->print_cr("Unable to link/verify ClassLoader.addClass method");
1026     return false; // initialization failed (cannot throw exception yet)
1027   }
1028   Universe::_loader_addClass_cache->init(
1029     SystemDictionary::ClassLoader_klass(), m);
1030 
1031   // Setup method for checking protection domain
1032   InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())->link_class(CHECK_false);
1033   m = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())->
1034             find_method(vmSymbols::impliesCreateAccessControlContext_name(),
1035                         vmSymbols::void_boolean_signature());
1036   // Allow NULL which should only happen with bootstrapping.
1037   if (m != NULL) {
1038     if (m->is_static()) {
1039       // NoSuchMethodException doesn't actually work because it tries to run the
1040       // <init> function before java_lang_Class is linked. Print error and exit.
1041       tty->print_cr("ProtectionDomain.impliesCreateAccessControlContext() has the wrong linkage");
1042       return false; // initialization failed
1043     }
1044     Universe::_pd_implies_cache->init(
1045       SystemDictionary::ProtectionDomain_klass(), m);;
1046   }
1047 
1048   // This needs to be done before the first scavenge/gc, since
1049   // it's an input to soft ref clearing policy.
1050   {
1051     MutexLocker x(Heap_lock);
1052     Universe::update_heap_info_at_gc();
1053   }
1054 
1055   // ("weak") refs processing infrastructure initialization
1056   Universe::heap()->post_initialize();
1057 
1058   // Initialize performance counters for metaspaces
1059   MetaspaceCounters::initialize_performance_counters();
1060   CompressedClassSpaceCounters::initialize_performance_counters();
1061 
1062   MemoryService::add_metaspace_memory_pools();
1063 
1064   MemoryService::set_universe_heap(Universe::_collectedHeap);
1065 #if INCLUDE_CDS
1066   SharedClassUtil::initialize(CHECK_false);
1067 #endif
1068   return true;
1069 }
1070 
1071 
1072 void Universe::compute_base_vtable_size() {
1073   _base_vtable_size = ClassLoader::compute_Object_vtable();
1074 }
1075 
1076 

















































































































1077 void Universe::print() {
1078   print_on(gclog_or_tty);
1079 }
1080 
1081 void Universe::print_on(outputStream* st, bool extended) {
1082   st->print_cr("Heap");
1083   if (!extended) {
1084     heap()->print_on(st);
1085   } else {
1086     heap()->print_extended_on(st);
1087   }
1088 }
1089 
1090 void Universe::print_heap_at_SIGBREAK() {
1091   if (PrintHeapAtSIGBREAK) {
1092     MutexLocker hl(Heap_lock);
1093     print_on(tty);
1094     tty->cr();
1095     tty->flush();
1096   }
1097 }
1098 
1099 void Universe::print_heap_before_gc(outputStream* st, bool ignore_extended) {
1100   st->print_cr("{Heap before GC invocations=%u (full %u):",
1101                heap()->total_collections(),
1102                heap()->total_full_collections());
1103   if (!PrintHeapAtGCExtended || ignore_extended) {
1104     heap()->print_on(st);
1105   } else {
1106     heap()->print_extended_on(st);
1107   }
1108 }
1109 
1110 void Universe::print_heap_after_gc(outputStream* st, bool ignore_extended) {
1111   st->print_cr("Heap after GC invocations=%u (full %u):",
1112                heap()->total_collections(),
1113                heap()->total_full_collections());
1114   if (!PrintHeapAtGCExtended || ignore_extended) {
1115     heap()->print_on(st);
1116   } else {
1117     heap()->print_extended_on(st);
1118   }
1119   st->print_cr("}");
1120 }
1121 
1122 void Universe::verify(VerifyOption option, const char* prefix, bool silent) {
1123   // The use of _verify_in_progress is a temporary work around for
1124   // 6320749.  Don't bother with a creating a class to set and clear
1125   // it since it is only used in this method and the control flow is
1126   // straight forward.
1127   _verify_in_progress = true;
1128 
1129   COMPILER2_PRESENT(
1130     assert(!DerivedPointerTable::is_active(),
1131          "DPT should not be active during verification "
1132          "(of thread stacks below)");
1133   )
1134 
1135   ResourceMark rm;
1136   HandleMark hm;  // Handles created during verification can be zapped
1137   _verify_count++;
1138 
1139   if (!silent) gclog_or_tty->print("%s", prefix);
1140   if (!silent) gclog_or_tty->print("[Verifying ");
1141   if (!silent) gclog_or_tty->print("threads ");
1142   Threads::verify();
1143   if (!silent) gclog_or_tty->print("heap ");
1144   heap()->verify(silent, option);
1145   if (!silent) gclog_or_tty->print("syms ");
1146   SymbolTable::verify();
1147   if (!silent) gclog_or_tty->print("strs ");
1148   StringTable::verify();
1149   {
1150     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1151     if (!silent) gclog_or_tty->print("zone ");
1152     CodeCache::verify();
1153   }
1154   if (!silent) gclog_or_tty->print("dict ");
1155   SystemDictionary::verify();
1156 #ifndef PRODUCT
1157   if (!silent) gclog_or_tty->print("cldg ");
1158   ClassLoaderDataGraph::verify();
1159 #endif
1160   if (!silent) gclog_or_tty->print("metaspace chunks ");
1161   MetaspaceAux::verify_free_chunks();
1162   if (!silent) gclog_or_tty->print("hand ");
1163   JNIHandles::verify();
1164   if (!silent) gclog_or_tty->print("C-heap ");
1165   os::check_heap();
1166   if (!silent) gclog_or_tty->print("code cache ");
1167   CodeCache::verify_oops();
1168   if (!silent) gclog_or_tty->print_cr("]");
1169 
1170   _verify_in_progress = false;
1171 }
1172 
1173 // Oop verification (see MacroAssembler::verify_oop)
1174 
1175 static uintptr_t _verify_oop_data[2]   = {0, (uintptr_t)-1};
1176 static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1};
1177 
1178 
1179 #ifndef PRODUCT
1180 
1181 static void calculate_verify_data(uintptr_t verify_data[2],
1182                                   HeapWord* low_boundary,
1183                                   HeapWord* high_boundary) {
1184   assert(low_boundary < high_boundary, "bad interval");
1185 
1186   // decide which low-order bits we require to be clear:
1187   size_t alignSize = MinObjAlignmentInBytes;
1188   size_t min_object_size = CollectedHeap::min_fill_size();
1189 
1190   // make an inclusive limit:
1191   uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize;
1192   uintptr_t min = (uintptr_t)low_boundary;
1193   assert(min < max, "bad interval");
1194   uintptr_t diff = max ^ min;
1195 
1196   // throw away enough low-order bits to make the diff vanish
1197   uintptr_t mask = (uintptr_t)(-1);
1198   while ((mask & diff) != 0)
1199     mask <<= 1;
1200   uintptr_t bits = (min & mask);
1201   assert(bits == (max & mask), "correct mask");
1202   // check an intermediate value between min and max, just to make sure:
1203   assert(bits == ((min + (max-min)/2) & mask), "correct mask");
1204 
1205   // require address alignment, too:
1206   mask |= (alignSize - 1);
1207 
1208   if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) {
1209     assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability");
1210   }
1211   verify_data[0] = mask;
1212   verify_data[1] = bits;
1213 }
1214 
1215 // Oop verification (see MacroAssembler::verify_oop)
1216 
1217 uintptr_t Universe::verify_oop_mask() {
1218   MemRegion m = heap()->reserved_region();
1219   calculate_verify_data(_verify_oop_data,
1220                         m.start(),
1221                         m.end());
1222   return _verify_oop_data[0];
1223 }
1224 
1225 
1226 
1227 uintptr_t Universe::verify_oop_bits() {
1228   verify_oop_mask();
1229   return _verify_oop_data[1];
1230 }
1231 
1232 uintptr_t Universe::verify_mark_mask() {
1233   return markOopDesc::lock_mask_in_place;
1234 }
1235 
1236 uintptr_t Universe::verify_mark_bits() {
1237   intptr_t mask = verify_mark_mask();
1238   intptr_t bits = (intptr_t)markOopDesc::prototype();
1239   assert((bits & ~mask) == 0, "no stray header bits");
1240   return bits;
1241 }
1242 #endif // PRODUCT
1243 
1244 
1245 void Universe::compute_verify_oop_data() {
1246   verify_oop_mask();
1247   verify_oop_bits();
1248   verify_mark_mask();
1249   verify_mark_bits();
1250 }
1251 
1252 
1253 void LatestMethodCache::init(Klass* k, Method* m) {
1254   if (!UseSharedSpaces) {
1255     _klass = k;
1256   }
1257 #ifndef PRODUCT
1258   else {
1259     // sharing initilization should have already set up _klass
1260     assert(_klass != NULL, "just checking");
1261   }
1262 #endif
1263 
1264   _method_idnum = m->method_idnum();
1265   assert(_method_idnum >= 0, "sanity check");
1266 }
1267 
1268 
1269 Method* LatestMethodCache::get_method() {
1270   if (klass() == NULL) return NULL;
1271   InstanceKlass* ik = InstanceKlass::cast(klass());
1272   Method* m = ik->method_with_idnum(method_idnum());
1273   assert(m != NULL, "sanity check");
1274   return m;
1275 }
1276 
1277 
1278 #ifdef ASSERT
1279 // Release dummy object(s) at bottom of heap
1280 bool Universe::release_fullgc_alot_dummy() {
1281   MutexLocker ml(FullGCALot_lock);
1282   if (_fullgc_alot_dummy_array != NULL) {
1283     if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) {
1284       // No more dummies to release, release entire array instead
1285       _fullgc_alot_dummy_array = NULL;
1286       return false;
1287     }
1288     if (!UseConcMarkSweepGC) {
1289       // Release dummy at bottom of old generation
1290       _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL);
1291     }
1292     // Release dummy at bottom of permanent generation
1293     _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL);
1294   }
1295   return true;
1296 }
1297 
1298 #endif // ASSERT
--- EOF ---