Wed, 27 Apr 2016 01:25:04 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "classfile/classLoader.hpp" |
aoqi@0 | 27 | #include "classfile/classLoaderData.hpp" |
aoqi@0 | 28 | #include "classfile/javaClasses.hpp" |
aoqi@0 | 29 | #include "classfile/symbolTable.hpp" |
aoqi@0 | 30 | #include "classfile/systemDictionary.hpp" |
aoqi@0 | 31 | #include "classfile/vmSymbols.hpp" |
aoqi@0 | 32 | #include "code/codeCache.hpp" |
aoqi@0 | 33 | #include "code/dependencies.hpp" |
aoqi@0 | 34 | #include "gc_interface/collectedHeap.inline.hpp" |
aoqi@0 | 35 | #include "interpreter/interpreter.hpp" |
aoqi@0 | 36 | #include "memory/cardTableModRefBS.hpp" |
aoqi@0 | 37 | #include "memory/gcLocker.inline.hpp" |
aoqi@0 | 38 | #include "memory/genCollectedHeap.hpp" |
aoqi@0 | 39 | #include "memory/genRemSet.hpp" |
aoqi@0 | 40 | #include "memory/generation.hpp" |
aoqi@0 | 41 | #include "memory/metadataFactory.hpp" |
aoqi@0 | 42 | #include "memory/metaspaceShared.hpp" |
aoqi@0 | 43 | #include "memory/oopFactory.hpp" |
aoqi@0 | 44 | #include "memory/space.hpp" |
aoqi@0 | 45 | #include "memory/universe.hpp" |
aoqi@0 | 46 | #include "memory/universe.inline.hpp" |
aoqi@0 | 47 | #include "oops/constantPool.hpp" |
aoqi@0 | 48 | #include "oops/instanceClassLoaderKlass.hpp" |
aoqi@0 | 49 | #include "oops/instanceKlass.hpp" |
aoqi@0 | 50 | #include "oops/instanceMirrorKlass.hpp" |
aoqi@0 | 51 | #include "oops/instanceRefKlass.hpp" |
aoqi@0 | 52 | #include "oops/oop.inline.hpp" |
aoqi@0 | 53 | #include "oops/typeArrayKlass.hpp" |
aoqi@0 | 54 | #include "prims/jvmtiRedefineClassesTrace.hpp" |
aoqi@0 | 55 | #include "runtime/arguments.hpp" |
aoqi@0 | 56 | #include "runtime/deoptimization.hpp" |
aoqi@0 | 57 | #include "runtime/fprofiler.hpp" |
aoqi@0 | 58 | #include "runtime/handles.inline.hpp" |
aoqi@0 | 59 | #include "runtime/init.hpp" |
aoqi@0 | 60 | #include "runtime/java.hpp" |
aoqi@0 | 61 | #include "runtime/javaCalls.hpp" |
aoqi@0 | 62 | #include "runtime/sharedRuntime.hpp" |
aoqi@0 | 63 | #include "runtime/synchronizer.hpp" |
aoqi@0 | 64 | #include "runtime/thread.inline.hpp" |
aoqi@0 | 65 | #include "runtime/timer.hpp" |
aoqi@0 | 66 | #include "runtime/vm_operations.hpp" |
aoqi@0 | 67 | #include "services/memoryService.hpp" |
aoqi@0 | 68 | #include "utilities/copy.hpp" |
aoqi@0 | 69 | #include "utilities/events.hpp" |
aoqi@0 | 70 | #include "utilities/hashtable.inline.hpp" |
aoqi@0 | 71 | #include "utilities/preserveException.hpp" |
aoqi@0 | 72 | #include "utilities/macros.hpp" |
aoqi@0 | 73 | #if INCLUDE_ALL_GCS |
aoqi@0 | 74 | #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" |
aoqi@0 | 75 | #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" |
aoqi@0 | 76 | #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
aoqi@0 | 77 | #include "gc_implementation/g1/g1CollectorPolicy.hpp" |
aoqi@0 | 78 | #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
aoqi@0 | 79 | #endif // INCLUDE_ALL_GCS |
aoqi@0 | 80 | |
aoqi@0 | 81 | PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
aoqi@0 | 82 | |
aoqi@0 | 83 | // Known objects |
aoqi@0 | 84 | Klass* Universe::_boolArrayKlassObj = NULL; |
aoqi@0 | 85 | Klass* Universe::_byteArrayKlassObj = NULL; |
aoqi@0 | 86 | Klass* Universe::_charArrayKlassObj = NULL; |
aoqi@0 | 87 | Klass* Universe::_intArrayKlassObj = NULL; |
aoqi@0 | 88 | Klass* Universe::_shortArrayKlassObj = NULL; |
aoqi@0 | 89 | Klass* Universe::_longArrayKlassObj = NULL; |
aoqi@0 | 90 | Klass* Universe::_singleArrayKlassObj = NULL; |
aoqi@0 | 91 | Klass* Universe::_doubleArrayKlassObj = NULL; |
aoqi@0 | 92 | Klass* Universe::_typeArrayKlassObjs[T_VOID+1] = { NULL /*, NULL...*/ }; |
aoqi@0 | 93 | Klass* Universe::_objectArrayKlassObj = NULL; |
aoqi@0 | 94 | oop Universe::_int_mirror = NULL; |
aoqi@0 | 95 | oop Universe::_float_mirror = NULL; |
aoqi@0 | 96 | oop Universe::_double_mirror = NULL; |
aoqi@0 | 97 | oop Universe::_byte_mirror = NULL; |
aoqi@0 | 98 | oop Universe::_bool_mirror = NULL; |
aoqi@0 | 99 | oop Universe::_char_mirror = NULL; |
aoqi@0 | 100 | oop Universe::_long_mirror = NULL; |
aoqi@0 | 101 | oop Universe::_short_mirror = NULL; |
aoqi@0 | 102 | oop Universe::_void_mirror = NULL; |
aoqi@0 | 103 | oop Universe::_mirrors[T_VOID+1] = { NULL /*, NULL...*/ }; |
aoqi@0 | 104 | oop Universe::_main_thread_group = NULL; |
aoqi@0 | 105 | oop Universe::_system_thread_group = NULL; |
aoqi@0 | 106 | objArrayOop Universe::_the_empty_class_klass_array = NULL; |
aoqi@0 | 107 | Array<Klass*>* Universe::_the_array_interfaces_array = NULL; |
aoqi@0 | 108 | oop Universe::_the_null_string = NULL; |
aoqi@0 | 109 | oop Universe::_the_min_jint_string = NULL; |
aoqi@0 | 110 | LatestMethodCache* Universe::_finalizer_register_cache = NULL; |
aoqi@0 | 111 | LatestMethodCache* Universe::_loader_addClass_cache = NULL; |
aoqi@0 | 112 | LatestMethodCache* Universe::_pd_implies_cache = NULL; |
aoqi@0 | 113 | oop Universe::_out_of_memory_error_java_heap = NULL; |
aoqi@0 | 114 | oop Universe::_out_of_memory_error_metaspace = NULL; |
aoqi@0 | 115 | oop Universe::_out_of_memory_error_class_metaspace = NULL; |
aoqi@0 | 116 | oop Universe::_out_of_memory_error_array_size = NULL; |
aoqi@0 | 117 | oop Universe::_out_of_memory_error_gc_overhead_limit = NULL; |
aoqi@0 | 118 | objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL; |
aoqi@0 | 119 | volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0; |
aoqi@0 | 120 | bool Universe::_verify_in_progress = false; |
aoqi@0 | 121 | oop Universe::_null_ptr_exception_instance = NULL; |
aoqi@0 | 122 | oop Universe::_arithmetic_exception_instance = NULL; |
aoqi@0 | 123 | oop Universe::_virtual_machine_error_instance = NULL; |
aoqi@0 | 124 | oop Universe::_vm_exception = NULL; |
aoqi@0 | 125 | Method* Universe::_throw_illegal_access_error = NULL; |
aoqi@0 | 126 | Array<int>* Universe::_the_empty_int_array = NULL; |
aoqi@0 | 127 | Array<u2>* Universe::_the_empty_short_array = NULL; |
aoqi@0 | 128 | Array<Klass*>* Universe::_the_empty_klass_array = NULL; |
aoqi@0 | 129 | Array<Method*>* Universe::_the_empty_method_array = NULL; |
aoqi@0 | 130 | |
aoqi@0 | 131 | // These variables are guarded by FullGCALot_lock. |
aoqi@0 | 132 | debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;) |
aoqi@0 | 133 | debug_only(int Universe::_fullgc_alot_dummy_next = 0;) |
aoqi@0 | 134 | |
aoqi@0 | 135 | // Heap |
aoqi@0 | 136 | int Universe::_verify_count = 0; |
aoqi@0 | 137 | |
aoqi@0 | 138 | int Universe::_base_vtable_size = 0; |
aoqi@0 | 139 | bool Universe::_bootstrapping = false; |
aoqi@0 | 140 | bool Universe::_fully_initialized = false; |
aoqi@0 | 141 | |
aoqi@0 | 142 | size_t Universe::_heap_capacity_at_last_gc; |
aoqi@0 | 143 | size_t Universe::_heap_used_at_last_gc = 0; |
aoqi@0 | 144 | |
aoqi@0 | 145 | CollectedHeap* Universe::_collectedHeap = NULL; |
aoqi@0 | 146 | |
aoqi@0 | 147 | NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true }; |
aoqi@0 | 148 | NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true }; |
aoqi@0 | 149 | address Universe::_narrow_ptrs_base; |
aoqi@0 | 150 | |
aoqi@0 | 151 | void Universe::basic_type_classes_do(void f(Klass*)) { |
aoqi@0 | 152 | f(boolArrayKlassObj()); |
aoqi@0 | 153 | f(byteArrayKlassObj()); |
aoqi@0 | 154 | f(charArrayKlassObj()); |
aoqi@0 | 155 | f(intArrayKlassObj()); |
aoqi@0 | 156 | f(shortArrayKlassObj()); |
aoqi@0 | 157 | f(longArrayKlassObj()); |
aoqi@0 | 158 | f(singleArrayKlassObj()); |
aoqi@0 | 159 | f(doubleArrayKlassObj()); |
aoqi@0 | 160 | } |
aoqi@0 | 161 | |
aoqi@0 | 162 | void Universe::oops_do(OopClosure* f, bool do_all) { |
aoqi@0 | 163 | |
aoqi@0 | 164 | f->do_oop((oop*) &_int_mirror); |
aoqi@0 | 165 | f->do_oop((oop*) &_float_mirror); |
aoqi@0 | 166 | f->do_oop((oop*) &_double_mirror); |
aoqi@0 | 167 | f->do_oop((oop*) &_byte_mirror); |
aoqi@0 | 168 | f->do_oop((oop*) &_bool_mirror); |
aoqi@0 | 169 | f->do_oop((oop*) &_char_mirror); |
aoqi@0 | 170 | f->do_oop((oop*) &_long_mirror); |
aoqi@0 | 171 | f->do_oop((oop*) &_short_mirror); |
aoqi@0 | 172 | f->do_oop((oop*) &_void_mirror); |
aoqi@0 | 173 | |
aoqi@0 | 174 | for (int i = T_BOOLEAN; i < T_VOID+1; i++) { |
aoqi@0 | 175 | f->do_oop((oop*) &_mirrors[i]); |
aoqi@0 | 176 | } |
aoqi@0 | 177 | assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking"); |
aoqi@0 | 178 | |
aoqi@0 | 179 | f->do_oop((oop*)&_the_empty_class_klass_array); |
aoqi@0 | 180 | f->do_oop((oop*)&_the_null_string); |
aoqi@0 | 181 | f->do_oop((oop*)&_the_min_jint_string); |
aoqi@0 | 182 | f->do_oop((oop*)&_out_of_memory_error_java_heap); |
aoqi@0 | 183 | f->do_oop((oop*)&_out_of_memory_error_metaspace); |
aoqi@0 | 184 | f->do_oop((oop*)&_out_of_memory_error_class_metaspace); |
aoqi@0 | 185 | f->do_oop((oop*)&_out_of_memory_error_array_size); |
aoqi@0 | 186 | f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit); |
aoqi@0 | 187 | f->do_oop((oop*)&_preallocated_out_of_memory_error_array); |
aoqi@0 | 188 | f->do_oop((oop*)&_null_ptr_exception_instance); |
aoqi@0 | 189 | f->do_oop((oop*)&_arithmetic_exception_instance); |
aoqi@0 | 190 | f->do_oop((oop*)&_virtual_machine_error_instance); |
aoqi@0 | 191 | f->do_oop((oop*)&_main_thread_group); |
aoqi@0 | 192 | f->do_oop((oop*)&_system_thread_group); |
aoqi@0 | 193 | f->do_oop((oop*)&_vm_exception); |
aoqi@0 | 194 | debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);) |
aoqi@0 | 195 | } |
aoqi@0 | 196 | |
aoqi@0 | 197 | // Serialize metadata in and out of CDS archive, not oops. |
aoqi@0 | 198 | void Universe::serialize(SerializeClosure* f, bool do_all) { |
aoqi@0 | 199 | |
aoqi@0 | 200 | f->do_ptr((void**)&_boolArrayKlassObj); |
aoqi@0 | 201 | f->do_ptr((void**)&_byteArrayKlassObj); |
aoqi@0 | 202 | f->do_ptr((void**)&_charArrayKlassObj); |
aoqi@0 | 203 | f->do_ptr((void**)&_intArrayKlassObj); |
aoqi@0 | 204 | f->do_ptr((void**)&_shortArrayKlassObj); |
aoqi@0 | 205 | f->do_ptr((void**)&_longArrayKlassObj); |
aoqi@0 | 206 | f->do_ptr((void**)&_singleArrayKlassObj); |
aoqi@0 | 207 | f->do_ptr((void**)&_doubleArrayKlassObj); |
aoqi@0 | 208 | f->do_ptr((void**)&_objectArrayKlassObj); |
aoqi@0 | 209 | |
aoqi@0 | 210 | { |
aoqi@0 | 211 | for (int i = 0; i < T_VOID+1; i++) { |
aoqi@0 | 212 | if (_typeArrayKlassObjs[i] != NULL) { |
aoqi@0 | 213 | assert(i >= T_BOOLEAN, "checking"); |
aoqi@0 | 214 | f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
aoqi@0 | 215 | } else if (do_all) { |
aoqi@0 | 216 | f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
aoqi@0 | 217 | } |
aoqi@0 | 218 | } |
aoqi@0 | 219 | } |
aoqi@0 | 220 | |
aoqi@0 | 221 | f->do_ptr((void**)&_the_array_interfaces_array); |
aoqi@0 | 222 | f->do_ptr((void**)&_the_empty_int_array); |
aoqi@0 | 223 | f->do_ptr((void**)&_the_empty_short_array); |
aoqi@0 | 224 | f->do_ptr((void**)&_the_empty_method_array); |
aoqi@0 | 225 | f->do_ptr((void**)&_the_empty_klass_array); |
aoqi@0 | 226 | _finalizer_register_cache->serialize(f); |
aoqi@0 | 227 | _loader_addClass_cache->serialize(f); |
aoqi@0 | 228 | _pd_implies_cache->serialize(f); |
aoqi@0 | 229 | } |
aoqi@0 | 230 | |
aoqi@0 | 231 | void Universe::check_alignment(uintx size, uintx alignment, const char* name) { |
aoqi@0 | 232 | if (size < alignment || size % alignment != 0) { |
aoqi@0 | 233 | vm_exit_during_initialization( |
aoqi@0 | 234 | err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment)); |
aoqi@0 | 235 | } |
aoqi@0 | 236 | } |
aoqi@0 | 237 | |
aoqi@0 | 238 | void initialize_basic_type_klass(Klass* k, TRAPS) { |
aoqi@0 | 239 | Klass* ok = SystemDictionary::Object_klass(); |
aoqi@0 | 240 | if (UseSharedSpaces) { |
aoqi@0 | 241 | assert(k->super() == ok, "u3"); |
aoqi@0 | 242 | k->restore_unshareable_info(CHECK); |
aoqi@0 | 243 | } else { |
aoqi@0 | 244 | k->initialize_supers(ok, CHECK); |
aoqi@0 | 245 | } |
aoqi@0 | 246 | k->append_to_sibling_list(); |
aoqi@0 | 247 | } |
aoqi@0 | 248 | |
aoqi@0 | 249 | void Universe::genesis(TRAPS) { |
aoqi@0 | 250 | ResourceMark rm; |
aoqi@0 | 251 | |
aoqi@0 | 252 | { FlagSetting fs(_bootstrapping, true); |
aoqi@0 | 253 | |
aoqi@0 | 254 | { MutexLocker mc(Compile_lock); |
aoqi@0 | 255 | |
aoqi@0 | 256 | // determine base vtable size; without that we cannot create the array klasses |
aoqi@0 | 257 | compute_base_vtable_size(); |
aoqi@0 | 258 | |
aoqi@0 | 259 | if (!UseSharedSpaces) { |
aoqi@0 | 260 | _boolArrayKlassObj = TypeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK); |
aoqi@0 | 261 | _charArrayKlassObj = TypeArrayKlass::create_klass(T_CHAR, sizeof(jchar), CHECK); |
aoqi@0 | 262 | _singleArrayKlassObj = TypeArrayKlass::create_klass(T_FLOAT, sizeof(jfloat), CHECK); |
aoqi@0 | 263 | _doubleArrayKlassObj = TypeArrayKlass::create_klass(T_DOUBLE, sizeof(jdouble), CHECK); |
aoqi@0 | 264 | _byteArrayKlassObj = TypeArrayKlass::create_klass(T_BYTE, sizeof(jbyte), CHECK); |
aoqi@0 | 265 | _shortArrayKlassObj = TypeArrayKlass::create_klass(T_SHORT, sizeof(jshort), CHECK); |
aoqi@0 | 266 | _intArrayKlassObj = TypeArrayKlass::create_klass(T_INT, sizeof(jint), CHECK); |
aoqi@0 | 267 | _longArrayKlassObj = TypeArrayKlass::create_klass(T_LONG, sizeof(jlong), CHECK); |
aoqi@0 | 268 | |
aoqi@0 | 269 | _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj; |
aoqi@0 | 270 | _typeArrayKlassObjs[T_CHAR] = _charArrayKlassObj; |
aoqi@0 | 271 | _typeArrayKlassObjs[T_FLOAT] = _singleArrayKlassObj; |
aoqi@0 | 272 | _typeArrayKlassObjs[T_DOUBLE] = _doubleArrayKlassObj; |
aoqi@0 | 273 | _typeArrayKlassObjs[T_BYTE] = _byteArrayKlassObj; |
aoqi@0 | 274 | _typeArrayKlassObjs[T_SHORT] = _shortArrayKlassObj; |
aoqi@0 | 275 | _typeArrayKlassObjs[T_INT] = _intArrayKlassObj; |
aoqi@0 | 276 | _typeArrayKlassObjs[T_LONG] = _longArrayKlassObj; |
aoqi@0 | 277 | |
aoqi@0 | 278 | ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); |
aoqi@0 | 279 | |
aoqi@0 | 280 | _the_array_interfaces_array = MetadataFactory::new_array<Klass*>(null_cld, 2, NULL, CHECK); |
aoqi@0 | 281 | _the_empty_int_array = MetadataFactory::new_array<int>(null_cld, 0, CHECK); |
aoqi@0 | 282 | _the_empty_short_array = MetadataFactory::new_array<u2>(null_cld, 0, CHECK); |
aoqi@0 | 283 | _the_empty_method_array = MetadataFactory::new_array<Method*>(null_cld, 0, CHECK); |
aoqi@0 | 284 | _the_empty_klass_array = MetadataFactory::new_array<Klass*>(null_cld, 0, CHECK); |
aoqi@0 | 285 | } |
aoqi@0 | 286 | } |
aoqi@0 | 287 | |
aoqi@0 | 288 | vmSymbols::initialize(CHECK); |
aoqi@0 | 289 | |
aoqi@0 | 290 | SystemDictionary::initialize(CHECK); |
aoqi@0 | 291 | |
aoqi@0 | 292 | Klass* ok = SystemDictionary::Object_klass(); |
aoqi@0 | 293 | |
aoqi@0 | 294 | _the_null_string = StringTable::intern("null", CHECK); |
aoqi@0 | 295 | _the_min_jint_string = StringTable::intern("-2147483648", CHECK); |
aoqi@0 | 296 | |
aoqi@0 | 297 | if (UseSharedSpaces) { |
aoqi@0 | 298 | // Verify shared interfaces array. |
aoqi@0 | 299 | assert(_the_array_interfaces_array->at(0) == |
aoqi@0 | 300 | SystemDictionary::Cloneable_klass(), "u3"); |
aoqi@0 | 301 | assert(_the_array_interfaces_array->at(1) == |
aoqi@0 | 302 | SystemDictionary::Serializable_klass(), "u3"); |
aoqi@0 | 303 | } else { |
aoqi@0 | 304 | // Set up shared interfaces array. (Do this before supers are set up.) |
aoqi@0 | 305 | _the_array_interfaces_array->at_put(0, SystemDictionary::Cloneable_klass()); |
aoqi@0 | 306 | _the_array_interfaces_array->at_put(1, SystemDictionary::Serializable_klass()); |
aoqi@0 | 307 | } |
aoqi@0 | 308 | |
aoqi@0 | 309 | initialize_basic_type_klass(boolArrayKlassObj(), CHECK); |
aoqi@0 | 310 | initialize_basic_type_klass(charArrayKlassObj(), CHECK); |
aoqi@0 | 311 | initialize_basic_type_klass(singleArrayKlassObj(), CHECK); |
aoqi@0 | 312 | initialize_basic_type_klass(doubleArrayKlassObj(), CHECK); |
aoqi@0 | 313 | initialize_basic_type_klass(byteArrayKlassObj(), CHECK); |
aoqi@0 | 314 | initialize_basic_type_klass(shortArrayKlassObj(), CHECK); |
aoqi@0 | 315 | initialize_basic_type_klass(intArrayKlassObj(), CHECK); |
aoqi@0 | 316 | initialize_basic_type_klass(longArrayKlassObj(), CHECK); |
aoqi@0 | 317 | } // end of core bootstrapping |
aoqi@0 | 318 | |
aoqi@0 | 319 | // Maybe this could be lifted up now that object array can be initialized |
aoqi@0 | 320 | // during the bootstrapping. |
aoqi@0 | 321 | |
aoqi@0 | 322 | // OLD |
aoqi@0 | 323 | // Initialize _objectArrayKlass after core bootstraping to make |
aoqi@0 | 324 | // sure the super class is set up properly for _objectArrayKlass. |
aoqi@0 | 325 | // --- |
aoqi@0 | 326 | // NEW |
aoqi@0 | 327 | // Since some of the old system object arrays have been converted to |
aoqi@0 | 328 | // ordinary object arrays, _objectArrayKlass will be loaded when |
aoqi@0 | 329 | // SystemDictionary::initialize(CHECK); is run. See the extra check |
aoqi@0 | 330 | // for Object_klass_loaded in objArrayKlassKlass::allocate_objArray_klass_impl. |
aoqi@0 | 331 | _objectArrayKlassObj = InstanceKlass:: |
aoqi@0 | 332 | cast(SystemDictionary::Object_klass())->array_klass(1, CHECK); |
aoqi@0 | 333 | // OLD |
aoqi@0 | 334 | // Add the class to the class hierarchy manually to make sure that |
aoqi@0 | 335 | // its vtable is initialized after core bootstrapping is completed. |
aoqi@0 | 336 | // --- |
aoqi@0 | 337 | // New |
aoqi@0 | 338 | // Have already been initialized. |
aoqi@0 | 339 | _objectArrayKlassObj->append_to_sibling_list(); |
aoqi@0 | 340 | |
aoqi@0 | 341 | // Compute is_jdk version flags. |
aoqi@0 | 342 | // Only 1.3 or later has the java.lang.Shutdown class. |
aoqi@0 | 343 | // Only 1.4 or later has the java.lang.CharSequence interface. |
aoqi@0 | 344 | // Only 1.5 or later has the java.lang.management.MemoryUsage class. |
aoqi@0 | 345 | if (JDK_Version::is_partially_initialized()) { |
aoqi@0 | 346 | uint8_t jdk_version; |
aoqi@0 | 347 | Klass* k = SystemDictionary::resolve_or_null( |
aoqi@0 | 348 | vmSymbols::java_lang_management_MemoryUsage(), THREAD); |
aoqi@0 | 349 | CLEAR_PENDING_EXCEPTION; // ignore exceptions |
aoqi@0 | 350 | if (k == NULL) { |
aoqi@0 | 351 | k = SystemDictionary::resolve_or_null( |
aoqi@0 | 352 | vmSymbols::java_lang_CharSequence(), THREAD); |
aoqi@0 | 353 | CLEAR_PENDING_EXCEPTION; // ignore exceptions |
aoqi@0 | 354 | if (k == NULL) { |
aoqi@0 | 355 | k = SystemDictionary::resolve_or_null( |
aoqi@0 | 356 | vmSymbols::java_lang_Shutdown(), THREAD); |
aoqi@0 | 357 | CLEAR_PENDING_EXCEPTION; // ignore exceptions |
aoqi@0 | 358 | if (k == NULL) { |
aoqi@0 | 359 | jdk_version = 2; |
aoqi@0 | 360 | } else { |
aoqi@0 | 361 | jdk_version = 3; |
aoqi@0 | 362 | } |
aoqi@0 | 363 | } else { |
aoqi@0 | 364 | jdk_version = 4; |
aoqi@0 | 365 | } |
aoqi@0 | 366 | } else { |
aoqi@0 | 367 | jdk_version = 5; |
aoqi@0 | 368 | } |
aoqi@0 | 369 | JDK_Version::fully_initialize(jdk_version); |
aoqi@0 | 370 | } |
aoqi@0 | 371 | |
aoqi@0 | 372 | #ifdef ASSERT |
aoqi@0 | 373 | if (FullGCALot) { |
aoqi@0 | 374 | // Allocate an array of dummy objects. |
aoqi@0 | 375 | // We'd like these to be at the bottom of the old generation, |
aoqi@0 | 376 | // so that when we free one and then collect, |
aoqi@0 | 377 | // (almost) the whole heap moves |
aoqi@0 | 378 | // and we find out if we actually update all the oops correctly. |
aoqi@0 | 379 | // But we can't allocate directly in the old generation, |
aoqi@0 | 380 | // so we allocate wherever, and hope that the first collection |
aoqi@0 | 381 | // moves these objects to the bottom of the old generation. |
aoqi@0 | 382 | // We can allocate directly in the permanent generation, so we do. |
aoqi@0 | 383 | int size; |
aoqi@0 | 384 | if (UseConcMarkSweepGC) { |
aoqi@0 | 385 | warning("Using +FullGCALot with concurrent mark sweep gc " |
aoqi@0 | 386 | "will not force all objects to relocate"); |
aoqi@0 | 387 | size = FullGCALotDummies; |
aoqi@0 | 388 | } else { |
aoqi@0 | 389 | size = FullGCALotDummies * 2; |
aoqi@0 | 390 | } |
aoqi@0 | 391 | objArrayOop naked_array = oopFactory::new_objArray(SystemDictionary::Object_klass(), size, CHECK); |
aoqi@0 | 392 | objArrayHandle dummy_array(THREAD, naked_array); |
aoqi@0 | 393 | int i = 0; |
aoqi@0 | 394 | while (i < size) { |
aoqi@0 | 395 | // Allocate dummy in old generation |
aoqi@0 | 396 | oop dummy = InstanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK); |
aoqi@0 | 397 | dummy_array->obj_at_put(i++, dummy); |
aoqi@0 | 398 | } |
aoqi@0 | 399 | { |
aoqi@0 | 400 | // Only modify the global variable inside the mutex. |
aoqi@0 | 401 | // If we had a race to here, the other dummy_array instances |
aoqi@0 | 402 | // and their elements just get dropped on the floor, which is fine. |
aoqi@0 | 403 | MutexLocker ml(FullGCALot_lock); |
aoqi@0 | 404 | if (_fullgc_alot_dummy_array == NULL) { |
aoqi@0 | 405 | _fullgc_alot_dummy_array = dummy_array(); |
aoqi@0 | 406 | } |
aoqi@0 | 407 | } |
aoqi@0 | 408 | assert(i == _fullgc_alot_dummy_array->length(), "just checking"); |
aoqi@0 | 409 | } |
aoqi@0 | 410 | #endif |
aoqi@0 | 411 | |
aoqi@0 | 412 | // Initialize dependency array for null class loader |
aoqi@0 | 413 | ClassLoaderData::the_null_class_loader_data()->init_dependencies(CHECK); |
aoqi@0 | 414 | |
aoqi@0 | 415 | } |
aoqi@0 | 416 | |
aoqi@0 | 417 | // CDS support for patching vtables in metadata in the shared archive. |
aoqi@0 | 418 | // All types inherited from Metadata have vtables, but not types inherited |
aoqi@0 | 419 | // from MetaspaceObj, because the latter does not have virtual functions. |
aoqi@0 | 420 | // If the metadata type has a vtable, it cannot be shared in the read-only |
aoqi@0 | 421 | // section of the CDS archive, because the vtable pointer is patched. |
aoqi@0 | 422 | static inline void add_vtable(void** list, int* n, void* o, int count) { |
aoqi@0 | 423 | guarantee((*n) < count, "vtable list too small"); |
aoqi@0 | 424 | void* vtable = dereference_vptr(o); |
aoqi@0 | 425 | assert(*(void**)(vtable) != NULL, "invalid vtable"); |
aoqi@0 | 426 | list[(*n)++] = vtable; |
aoqi@0 | 427 | } |
aoqi@0 | 428 | |
aoqi@0 | 429 | void Universe::init_self_patching_vtbl_list(void** list, int count) { |
aoqi@0 | 430 | int n = 0; |
aoqi@0 | 431 | { InstanceKlass o; add_vtable(list, &n, &o, count); } |
aoqi@0 | 432 | { InstanceClassLoaderKlass o; add_vtable(list, &n, &o, count); } |
aoqi@0 | 433 | { InstanceMirrorKlass o; add_vtable(list, &n, &o, count); } |
aoqi@0 | 434 | { InstanceRefKlass o; add_vtable(list, &n, &o, count); } |
aoqi@0 | 435 | { TypeArrayKlass o; add_vtable(list, &n, &o, count); } |
aoqi@0 | 436 | { ObjArrayKlass o; add_vtable(list, &n, &o, count); } |
aoqi@0 | 437 | { Method o; add_vtable(list, &n, &o, count); } |
aoqi@0 | 438 | { ConstantPool o; add_vtable(list, &n, &o, count); } |
aoqi@0 | 439 | } |
aoqi@0 | 440 | |
aoqi@0 | 441 | void Universe::initialize_basic_type_mirrors(TRAPS) { |
aoqi@0 | 442 | assert(_int_mirror==NULL, "basic type mirrors already initialized"); |
aoqi@0 | 443 | _int_mirror = |
aoqi@0 | 444 | java_lang_Class::create_basic_type_mirror("int", T_INT, CHECK); |
aoqi@0 | 445 | _float_mirror = |
aoqi@0 | 446 | java_lang_Class::create_basic_type_mirror("float", T_FLOAT, CHECK); |
aoqi@0 | 447 | _double_mirror = |
aoqi@0 | 448 | java_lang_Class::create_basic_type_mirror("double", T_DOUBLE, CHECK); |
aoqi@0 | 449 | _byte_mirror = |
aoqi@0 | 450 | java_lang_Class::create_basic_type_mirror("byte", T_BYTE, CHECK); |
aoqi@0 | 451 | _bool_mirror = |
aoqi@0 | 452 | java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK); |
aoqi@0 | 453 | _char_mirror = |
aoqi@0 | 454 | java_lang_Class::create_basic_type_mirror("char", T_CHAR, CHECK); |
aoqi@0 | 455 | _long_mirror = |
aoqi@0 | 456 | java_lang_Class::create_basic_type_mirror("long", T_LONG, CHECK); |
aoqi@0 | 457 | _short_mirror = |
aoqi@0 | 458 | java_lang_Class::create_basic_type_mirror("short", T_SHORT, CHECK); |
aoqi@0 | 459 | _void_mirror = |
aoqi@0 | 460 | java_lang_Class::create_basic_type_mirror("void", T_VOID, CHECK); |
aoqi@0 | 461 | |
aoqi@0 | 462 | _mirrors[T_INT] = _int_mirror; |
aoqi@0 | 463 | _mirrors[T_FLOAT] = _float_mirror; |
aoqi@0 | 464 | _mirrors[T_DOUBLE] = _double_mirror; |
aoqi@0 | 465 | _mirrors[T_BYTE] = _byte_mirror; |
aoqi@0 | 466 | _mirrors[T_BOOLEAN] = _bool_mirror; |
aoqi@0 | 467 | _mirrors[T_CHAR] = _char_mirror; |
aoqi@0 | 468 | _mirrors[T_LONG] = _long_mirror; |
aoqi@0 | 469 | _mirrors[T_SHORT] = _short_mirror; |
aoqi@0 | 470 | _mirrors[T_VOID] = _void_mirror; |
aoqi@0 | 471 | //_mirrors[T_OBJECT] = InstanceKlass::cast(_object_klass)->java_mirror(); |
aoqi@0 | 472 | //_mirrors[T_ARRAY] = InstanceKlass::cast(_object_klass)->java_mirror(); |
aoqi@0 | 473 | } |
aoqi@0 | 474 | |
aoqi@0 | 475 | void Universe::fixup_mirrors(TRAPS) { |
aoqi@0 | 476 | // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly, |
aoqi@0 | 477 | // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply |
aoqi@0 | 478 | // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note |
aoqi@0 | 479 | // that the number of objects allocated at this point is very small. |
aoqi@0 | 480 | assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded"); |
aoqi@0 | 481 | HandleMark hm(THREAD); |
aoqi@0 | 482 | // Cache the start of the static fields |
aoqi@0 | 483 | InstanceMirrorKlass::init_offset_of_static_fields(); |
aoqi@0 | 484 | |
aoqi@0 | 485 | GrowableArray <Klass*>* list = java_lang_Class::fixup_mirror_list(); |
aoqi@0 | 486 | int list_length = list->length(); |
aoqi@0 | 487 | for (int i = 0; i < list_length; i++) { |
aoqi@0 | 488 | Klass* k = list->at(i); |
aoqi@0 | 489 | assert(k->is_klass(), "List should only hold classes"); |
aoqi@0 | 490 | EXCEPTION_MARK; |
aoqi@0 | 491 | KlassHandle kh(THREAD, k); |
aoqi@0 | 492 | java_lang_Class::fixup_mirror(kh, CATCH); |
aoqi@0 | 493 | } |
aoqi@0 | 494 | delete java_lang_Class::fixup_mirror_list(); |
aoqi@0 | 495 | java_lang_Class::set_fixup_mirror_list(NULL); |
aoqi@0 | 496 | } |
aoqi@0 | 497 | |
aoqi@0 | 498 | static bool has_run_finalizers_on_exit = false; |
aoqi@0 | 499 | |
aoqi@0 | 500 | void Universe::run_finalizers_on_exit() { |
aoqi@0 | 501 | if (has_run_finalizers_on_exit) return; |
aoqi@0 | 502 | has_run_finalizers_on_exit = true; |
aoqi@0 | 503 | |
aoqi@0 | 504 | // Called on VM exit. This ought to be run in a separate thread. |
aoqi@0 | 505 | if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit"); |
aoqi@0 | 506 | { |
aoqi@0 | 507 | PRESERVE_EXCEPTION_MARK; |
aoqi@0 | 508 | KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass()); |
aoqi@0 | 509 | JavaValue result(T_VOID); |
aoqi@0 | 510 | JavaCalls::call_static( |
aoqi@0 | 511 | &result, |
aoqi@0 | 512 | finalizer_klass, |
aoqi@0 | 513 | vmSymbols::run_finalizers_on_exit_name(), |
aoqi@0 | 514 | vmSymbols::void_method_signature(), |
aoqi@0 | 515 | THREAD |
aoqi@0 | 516 | ); |
aoqi@0 | 517 | // Ignore any pending exceptions |
aoqi@0 | 518 | CLEAR_PENDING_EXCEPTION; |
aoqi@0 | 519 | } |
aoqi@0 | 520 | } |
aoqi@0 | 521 | |
aoqi@0 | 522 | |
aoqi@0 | 523 | // initialize_vtable could cause gc if |
aoqi@0 | 524 | // 1) we specified true to initialize_vtable and |
aoqi@0 | 525 | // 2) this ran after gc was enabled |
aoqi@0 | 526 | // In case those ever change we use handles for oops |
aoqi@0 | 527 | void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) { |
aoqi@0 | 528 | // init vtable of k and all subclasses |
aoqi@0 | 529 | Klass* ko = k_h(); |
aoqi@0 | 530 | klassVtable* vt = ko->vtable(); |
aoqi@0 | 531 | if (vt) vt->initialize_vtable(false, CHECK); |
aoqi@0 | 532 | if (ko->oop_is_instance()) { |
aoqi@0 | 533 | InstanceKlass* ik = (InstanceKlass*)ko; |
aoqi@0 | 534 | for (KlassHandle s_h(THREAD, ik->subklass()); |
aoqi@0 | 535 | s_h() != NULL; |
aoqi@0 | 536 | s_h = KlassHandle(THREAD, s_h()->next_sibling())) { |
aoqi@0 | 537 | reinitialize_vtable_of(s_h, CHECK); |
aoqi@0 | 538 | } |
aoqi@0 | 539 | } |
aoqi@0 | 540 | } |
aoqi@0 | 541 | |
aoqi@0 | 542 | |
aoqi@0 | 543 | void initialize_itable_for_klass(Klass* k, TRAPS) { |
aoqi@0 | 544 | InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK); |
aoqi@0 | 545 | } |
aoqi@0 | 546 | |
aoqi@0 | 547 | |
aoqi@0 | 548 | void Universe::reinitialize_itables(TRAPS) { |
aoqi@0 | 549 | SystemDictionary::classes_do(initialize_itable_for_klass, CHECK); |
aoqi@0 | 550 | |
aoqi@0 | 551 | } |
aoqi@0 | 552 | |
aoqi@0 | 553 | |
aoqi@0 | 554 | bool Universe::on_page_boundary(void* addr) { |
aoqi@0 | 555 | return ((uintptr_t) addr) % os::vm_page_size() == 0; |
aoqi@0 | 556 | } |
aoqi@0 | 557 | |
aoqi@0 | 558 | |
aoqi@0 | 559 | bool Universe::should_fill_in_stack_trace(Handle throwable) { |
aoqi@0 | 560 | // never attempt to fill in the stack trace of preallocated errors that do not have |
aoqi@0 | 561 | // backtrace. These errors are kept alive forever and may be "re-used" when all |
aoqi@0 | 562 | // preallocated errors with backtrace have been consumed. Also need to avoid |
aoqi@0 | 563 | // a potential loop which could happen if an out of memory occurs when attempting |
aoqi@0 | 564 | // to allocate the backtrace. |
aoqi@0 | 565 | return ((throwable() != Universe::_out_of_memory_error_java_heap) && |
aoqi@0 | 566 | (throwable() != Universe::_out_of_memory_error_metaspace) && |
aoqi@0 | 567 | (throwable() != Universe::_out_of_memory_error_class_metaspace) && |
aoqi@0 | 568 | (throwable() != Universe::_out_of_memory_error_array_size) && |
aoqi@0 | 569 | (throwable() != Universe::_out_of_memory_error_gc_overhead_limit)); |
aoqi@0 | 570 | } |
aoqi@0 | 571 | |
aoqi@0 | 572 | |
aoqi@0 | 573 | oop Universe::gen_out_of_memory_error(oop default_err) { |
aoqi@0 | 574 | // generate an out of memory error: |
aoqi@0 | 575 | // - if there is a preallocated error with backtrace available then return it wth |
aoqi@0 | 576 | // a filled in stack trace. |
aoqi@0 | 577 | // - if there are no preallocated errors with backtrace available then return |
aoqi@0 | 578 | // an error without backtrace. |
aoqi@0 | 579 | int next; |
aoqi@0 | 580 | if (_preallocated_out_of_memory_error_avail_count > 0) { |
aoqi@0 | 581 | next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count); |
aoqi@0 | 582 | assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt"); |
aoqi@0 | 583 | } else { |
aoqi@0 | 584 | next = -1; |
aoqi@0 | 585 | } |
aoqi@0 | 586 | if (next < 0) { |
aoqi@0 | 587 | // all preallocated errors have been used. |
aoqi@0 | 588 | // return default |
aoqi@0 | 589 | return default_err; |
aoqi@0 | 590 | } else { |
aoqi@0 | 591 | // get the error object at the slot and set set it to NULL so that the |
aoqi@0 | 592 | // array isn't keeping it alive anymore. |
aoqi@0 | 593 | oop exc = preallocated_out_of_memory_errors()->obj_at(next); |
aoqi@0 | 594 | assert(exc != NULL, "slot has been used already"); |
aoqi@0 | 595 | preallocated_out_of_memory_errors()->obj_at_put(next, NULL); |
aoqi@0 | 596 | |
aoqi@0 | 597 | // use the message from the default error |
aoqi@0 | 598 | oop msg = java_lang_Throwable::message(default_err); |
aoqi@0 | 599 | assert(msg != NULL, "no message"); |
aoqi@0 | 600 | java_lang_Throwable::set_message(exc, msg); |
aoqi@0 | 601 | |
aoqi@0 | 602 | // populate the stack trace and return it. |
aoqi@0 | 603 | java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc); |
aoqi@0 | 604 | return exc; |
aoqi@0 | 605 | } |
aoqi@0 | 606 | } |
aoqi@0 | 607 | |
aoqi@0 | 608 | intptr_t Universe::_non_oop_bits = 0; |
aoqi@0 | 609 | |
aoqi@0 | 610 | void* Universe::non_oop_word() { |
aoqi@0 | 611 | // Neither the high bits nor the low bits of this value is allowed |
aoqi@0 | 612 | // to look like (respectively) the high or low bits of a real oop. |
aoqi@0 | 613 | // |
aoqi@0 | 614 | // High and low are CPU-specific notions, but low always includes |
aoqi@0 | 615 | // the low-order bit. Since oops are always aligned at least mod 4, |
aoqi@0 | 616 | // setting the low-order bit will ensure that the low half of the |
aoqi@0 | 617 | // word will never look like that of a real oop. |
aoqi@0 | 618 | // |
aoqi@0 | 619 | // Using the OS-supplied non-memory-address word (usually 0 or -1) |
aoqi@0 | 620 | // will take care of the high bits, however many there are. |
aoqi@0 | 621 | |
aoqi@0 | 622 | if (_non_oop_bits == 0) { |
aoqi@0 | 623 | _non_oop_bits = (intptr_t)os::non_memory_address_word() | 1; |
aoqi@0 | 624 | } |
aoqi@0 | 625 | |
aoqi@0 | 626 | return (void*)_non_oop_bits; |
aoqi@0 | 627 | } |
aoqi@0 | 628 | |
aoqi@0 | 629 | jint universe_init() { |
aoqi@0 | 630 | assert(!Universe::_fully_initialized, "called after initialize_vtables"); |
aoqi@0 | 631 | guarantee(1 << LogHeapWordSize == sizeof(HeapWord), |
aoqi@0 | 632 | "LogHeapWordSize is incorrect."); |
aoqi@0 | 633 | guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?"); |
aoqi@0 | 634 | guarantee(sizeof(oop) % sizeof(HeapWord) == 0, |
aoqi@0 | 635 | "oop size is not not a multiple of HeapWord size"); |
aoqi@0 | 636 | TraceTime timer("Genesis", TraceStartupTime); |
aoqi@0 | 637 | JavaClasses::compute_hard_coded_offsets(); |
aoqi@0 | 638 | |
aoqi@0 | 639 | jint status = Universe::initialize_heap(); |
aoqi@0 | 640 | if (status != JNI_OK) { |
aoqi@0 | 641 | return status; |
aoqi@0 | 642 | } |
aoqi@0 | 643 | |
aoqi@0 | 644 | Metaspace::global_initialize(); |
aoqi@0 | 645 | |
aoqi@0 | 646 | // Create memory for metadata. Must be after initializing heap for |
aoqi@0 | 647 | // DumpSharedSpaces. |
aoqi@0 | 648 | ClassLoaderData::init_null_class_loader_data(); |
aoqi@0 | 649 | |
aoqi@0 | 650 | // We have a heap so create the Method* caches before |
aoqi@0 | 651 | // Metaspace::initialize_shared_spaces() tries to populate them. |
aoqi@0 | 652 | Universe::_finalizer_register_cache = new LatestMethodCache(); |
aoqi@0 | 653 | Universe::_loader_addClass_cache = new LatestMethodCache(); |
aoqi@0 | 654 | Universe::_pd_implies_cache = new LatestMethodCache(); |
aoqi@0 | 655 | |
aoqi@0 | 656 | if (UseSharedSpaces) { |
aoqi@0 | 657 | // Read the data structures supporting the shared spaces (shared |
aoqi@0 | 658 | // system dictionary, symbol table, etc.). After that, access to |
aoqi@0 | 659 | // the file (other than the mapped regions) is no longer needed, and |
aoqi@0 | 660 | // the file is closed. Closing the file does not affect the |
aoqi@0 | 661 | // currently mapped regions. |
aoqi@0 | 662 | MetaspaceShared::initialize_shared_spaces(); |
aoqi@0 | 663 | StringTable::create_table(); |
aoqi@0 | 664 | } else { |
aoqi@0 | 665 | SymbolTable::create_table(); |
aoqi@0 | 666 | StringTable::create_table(); |
aoqi@0 | 667 | ClassLoader::create_package_info_table(); |
aoqi@0 | 668 | } |
aoqi@0 | 669 | |
aoqi@0 | 670 | return JNI_OK; |
aoqi@0 | 671 | } |
aoqi@0 | 672 | |
aoqi@0 | 673 | // Choose the heap base address and oop encoding mode |
aoqi@0 | 674 | // when compressed oops are used: |
aoqi@0 | 675 | // Unscaled - Use 32-bits oops without encoding when |
aoqi@0 | 676 | // NarrowOopHeapBaseMin + heap_size < 4Gb |
aoqi@0 | 677 | // ZeroBased - Use zero based compressed oops with encoding when |
aoqi@0 | 678 | // NarrowOopHeapBaseMin + heap_size < 32Gb |
aoqi@0 | 679 | // HeapBased - Use compressed oops with heap base + encoding. |
aoqi@0 | 680 | |
aoqi@0 | 681 | // 4Gb |
aoqi@0 | 682 | static const uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1); |
aoqi@0 | 683 | // 32Gb |
aoqi@0 | 684 | // OopEncodingHeapMax == UnscaledOopHeapMax << LogMinObjAlignmentInBytes; |
aoqi@0 | 685 | |
aoqi@0 | 686 | char* Universe::preferred_heap_base(size_t heap_size, size_t alignment, NARROW_OOP_MODE mode) { |
aoqi@0 | 687 | assert(is_size_aligned((size_t)OopEncodingHeapMax, alignment), "Must be"); |
aoqi@0 | 688 | assert(is_size_aligned((size_t)UnscaledOopHeapMax, alignment), "Must be"); |
aoqi@0 | 689 | assert(is_size_aligned(heap_size, alignment), "Must be"); |
aoqi@0 | 690 | |
aoqi@0 | 691 | uintx heap_base_min_address_aligned = align_size_up(HeapBaseMinAddress, alignment); |
aoqi@0 | 692 | |
aoqi@0 | 693 | size_t base = 0; |
aoqi@0 | 694 | #ifdef _LP64 |
aoqi@0 | 695 | if (UseCompressedOops) { |
aoqi@0 | 696 | assert(mode == UnscaledNarrowOop || |
aoqi@0 | 697 | mode == ZeroBasedNarrowOop || |
aoqi@0 | 698 | mode == HeapBasedNarrowOop, "mode is invalid"); |
aoqi@0 | 699 | const size_t total_size = heap_size + heap_base_min_address_aligned; |
aoqi@0 | 700 | // Return specified base for the first request. |
aoqi@0 | 701 | if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) { |
aoqi@0 | 702 | base = heap_base_min_address_aligned; |
aoqi@0 | 703 | |
aoqi@0 | 704 | // If the total size is small enough to allow UnscaledNarrowOop then |
aoqi@0 | 705 | // just use UnscaledNarrowOop. |
aoqi@0 | 706 | } else if ((total_size <= OopEncodingHeapMax) && (mode != HeapBasedNarrowOop)) { |
aoqi@0 | 707 | if ((total_size <= UnscaledOopHeapMax) && (mode == UnscaledNarrowOop) && |
aoqi@0 | 708 | (Universe::narrow_oop_shift() == 0)) { |
aoqi@0 | 709 | // Use 32-bits oops without encoding and |
aoqi@0 | 710 | // place heap's top on the 4Gb boundary |
aoqi@0 | 711 | base = (UnscaledOopHeapMax - heap_size); |
aoqi@0 | 712 | } else { |
aoqi@0 | 713 | // Can't reserve with NarrowOopShift == 0 |
aoqi@0 | 714 | Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
aoqi@0 | 715 | |
aoqi@0 | 716 | if (mode == UnscaledNarrowOop || |
aoqi@0 | 717 | mode == ZeroBasedNarrowOop && total_size <= UnscaledOopHeapMax) { |
aoqi@0 | 718 | |
aoqi@0 | 719 | // Use zero based compressed oops with encoding and |
aoqi@0 | 720 | // place heap's top on the 32Gb boundary in case |
aoqi@0 | 721 | // total_size > 4Gb or failed to reserve below 4Gb. |
aoqi@0 | 722 | uint64_t heap_top = OopEncodingHeapMax; |
aoqi@0 | 723 | |
aoqi@0 | 724 | // For small heaps, save some space for compressed class pointer |
aoqi@0 | 725 | // space so it can be decoded with no base. |
aoqi@0 | 726 | if (UseCompressedClassPointers && !UseSharedSpaces && |
aoqi@0 | 727 | OopEncodingHeapMax <= 32*G) { |
aoqi@0 | 728 | |
aoqi@0 | 729 | uint64_t class_space = align_size_up(CompressedClassSpaceSize, alignment); |
aoqi@0 | 730 | assert(is_size_aligned((size_t)OopEncodingHeapMax-class_space, |
aoqi@0 | 731 | alignment), "difference must be aligned too"); |
aoqi@0 | 732 | uint64_t new_top = OopEncodingHeapMax-class_space; |
aoqi@0 | 733 | |
aoqi@0 | 734 | if (total_size <= new_top) { |
aoqi@0 | 735 | heap_top = new_top; |
aoqi@0 | 736 | } |
aoqi@0 | 737 | } |
aoqi@0 | 738 | |
aoqi@0 | 739 | // Align base to the adjusted top of the heap |
aoqi@0 | 740 | base = heap_top - heap_size; |
aoqi@0 | 741 | } |
aoqi@0 | 742 | } |
aoqi@0 | 743 | } else { |
aoqi@0 | 744 | // UnscaledNarrowOop encoding didn't work, and no base was found for ZeroBasedOops or |
aoqi@0 | 745 | // HeapBasedNarrowOop encoding was requested. So, can't reserve below 32Gb. |
aoqi@0 | 746 | Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
aoqi@0 | 747 | } |
aoqi@0 | 748 | |
aoqi@0 | 749 | // Set narrow_oop_base and narrow_oop_use_implicit_null_checks |
aoqi@0 | 750 | // used in ReservedHeapSpace() constructors. |
aoqi@0 | 751 | // The final values will be set in initialize_heap() below. |
aoqi@0 | 752 | if ((base != 0) && ((base + heap_size) <= OopEncodingHeapMax)) { |
aoqi@0 | 753 | // Use zero based compressed oops |
aoqi@0 | 754 | Universe::set_narrow_oop_base(NULL); |
aoqi@0 | 755 | // Don't need guard page for implicit checks in indexed |
aoqi@0 | 756 | // addressing mode with zero based Compressed Oops. |
aoqi@0 | 757 | Universe::set_narrow_oop_use_implicit_null_checks(true); |
aoqi@0 | 758 | } else { |
aoqi@0 | 759 | // Set to a non-NULL value so the ReservedSpace ctor computes |
aoqi@0 | 760 | // the correct no-access prefix. |
aoqi@0 | 761 | // The final value will be set in initialize_heap() below. |
aoqi@0 | 762 | Universe::set_narrow_oop_base((address)UnscaledOopHeapMax); |
aoqi@0 | 763 | #if defined(_WIN64) || defined(AIX) |
aoqi@0 | 764 | if (UseLargePages) { |
aoqi@0 | 765 | // Cannot allocate guard pages for implicit checks in indexed |
aoqi@0 | 766 | // addressing mode when large pages are specified on windows. |
aoqi@0 | 767 | Universe::set_narrow_oop_use_implicit_null_checks(false); |
aoqi@0 | 768 | } |
aoqi@0 | 769 | #endif // _WIN64 |
aoqi@0 | 770 | } |
aoqi@0 | 771 | } |
aoqi@0 | 772 | #endif |
aoqi@0 | 773 | |
aoqi@0 | 774 | assert(is_ptr_aligned((char*)base, alignment), "Must be"); |
aoqi@0 | 775 | return (char*)base; // also return NULL (don't care) for 32-bit VM |
aoqi@0 | 776 | } |
aoqi@0 | 777 | |
aoqi@0 | 778 | jint Universe::initialize_heap() { |
aoqi@0 | 779 | |
aoqi@0 | 780 | if (UseParallelGC) { |
aoqi@0 | 781 | #if INCLUDE_ALL_GCS |
aoqi@0 | 782 | Universe::_collectedHeap = new ParallelScavengeHeap(); |
aoqi@0 | 783 | #else // INCLUDE_ALL_GCS |
aoqi@0 | 784 | fatal("UseParallelGC not supported in this VM."); |
aoqi@0 | 785 | #endif // INCLUDE_ALL_GCS |
aoqi@0 | 786 | |
aoqi@0 | 787 | } else if (UseG1GC) { |
aoqi@0 | 788 | #if INCLUDE_ALL_GCS |
aoqi@0 | 789 | G1CollectorPolicy* g1p = new G1CollectorPolicy(); |
aoqi@0 | 790 | g1p->initialize_all(); |
aoqi@0 | 791 | G1CollectedHeap* g1h = new G1CollectedHeap(g1p); |
aoqi@0 | 792 | Universe::_collectedHeap = g1h; |
aoqi@0 | 793 | #else // INCLUDE_ALL_GCS |
aoqi@0 | 794 | fatal("UseG1GC not supported in java kernel vm."); |
aoqi@0 | 795 | #endif // INCLUDE_ALL_GCS |
aoqi@0 | 796 | |
aoqi@0 | 797 | } else { |
aoqi@0 | 798 | GenCollectorPolicy *gc_policy; |
aoqi@0 | 799 | |
aoqi@0 | 800 | if (UseSerialGC) { |
aoqi@0 | 801 | gc_policy = new MarkSweepPolicy(); |
aoqi@0 | 802 | } else if (UseConcMarkSweepGC) { |
aoqi@0 | 803 | #if INCLUDE_ALL_GCS |
aoqi@0 | 804 | if (UseAdaptiveSizePolicy) { |
aoqi@0 | 805 | gc_policy = new ASConcurrentMarkSweepPolicy(); |
aoqi@0 | 806 | } else { |
aoqi@0 | 807 | gc_policy = new ConcurrentMarkSweepPolicy(); |
aoqi@0 | 808 | } |
aoqi@0 | 809 | #else // INCLUDE_ALL_GCS |
aoqi@0 | 810 | fatal("UseConcMarkSweepGC not supported in this VM."); |
aoqi@0 | 811 | #endif // INCLUDE_ALL_GCS |
aoqi@0 | 812 | } else { // default old generation |
aoqi@0 | 813 | gc_policy = new MarkSweepPolicy(); |
aoqi@0 | 814 | } |
aoqi@0 | 815 | gc_policy->initialize_all(); |
aoqi@0 | 816 | |
aoqi@0 | 817 | Universe::_collectedHeap = new GenCollectedHeap(gc_policy); |
aoqi@0 | 818 | } |
aoqi@0 | 819 | |
aoqi@0 | 820 | ThreadLocalAllocBuffer::set_max_size(Universe::heap()->max_tlab_size()); |
aoqi@0 | 821 | |
aoqi@0 | 822 | jint status = Universe::heap()->initialize(); |
aoqi@0 | 823 | if (status != JNI_OK) { |
aoqi@0 | 824 | return status; |
aoqi@0 | 825 | } |
aoqi@0 | 826 | |
aoqi@0 | 827 | #ifdef _LP64 |
aoqi@0 | 828 | if (UseCompressedOops) { |
aoqi@0 | 829 | // Subtract a page because something can get allocated at heap base. |
aoqi@0 | 830 | // This also makes implicit null checking work, because the |
aoqi@0 | 831 | // memory+1 page below heap_base needs to cause a signal. |
aoqi@0 | 832 | // See needs_explicit_null_check. |
aoqi@0 | 833 | // Only set the heap base for compressed oops because it indicates |
aoqi@0 | 834 | // compressed oops for pstack code. |
aoqi@0 | 835 | bool verbose = PrintCompressedOopsMode || (PrintMiscellaneous && Verbose); |
aoqi@0 | 836 | if (verbose) { |
aoqi@0 | 837 | tty->cr(); |
aoqi@0 | 838 | tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB", |
aoqi@0 | 839 | Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M); |
aoqi@0 | 840 | } |
aoqi@0 | 841 | if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax)) { |
aoqi@0 | 842 | // Can't reserve heap below 32Gb. |
aoqi@0 | 843 | // keep the Universe::narrow_oop_base() set in Universe::reserve_heap() |
aoqi@0 | 844 | Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
aoqi@0 | 845 | #ifdef AIX |
aoqi@0 | 846 | // There is no protected page before the heap. This assures all oops |
aoqi@0 | 847 | // are decoded so that NULL is preserved, so this page will not be accessed. |
aoqi@0 | 848 | Universe::set_narrow_oop_use_implicit_null_checks(false); |
aoqi@0 | 849 | #endif |
aoqi@0 | 850 | if (verbose) { |
aoqi@0 | 851 | tty->print(", %s: "PTR_FORMAT, |
aoqi@0 | 852 | narrow_oop_mode_to_string(HeapBasedNarrowOop), |
aoqi@0 | 853 | Universe::narrow_oop_base()); |
aoqi@0 | 854 | } |
aoqi@0 | 855 | } else { |
aoqi@0 | 856 | Universe::set_narrow_oop_base(0); |
aoqi@0 | 857 | if (verbose) { |
aoqi@0 | 858 | tty->print(", %s", narrow_oop_mode_to_string(ZeroBasedNarrowOop)); |
aoqi@0 | 859 | } |
aoqi@0 | 860 | #ifdef _WIN64 |
aoqi@0 | 861 | if (!Universe::narrow_oop_use_implicit_null_checks()) { |
aoqi@0 | 862 | // Don't need guard page for implicit checks in indexed addressing |
aoqi@0 | 863 | // mode with zero based Compressed Oops. |
aoqi@0 | 864 | Universe::set_narrow_oop_use_implicit_null_checks(true); |
aoqi@0 | 865 | } |
aoqi@0 | 866 | #endif // _WIN64 |
aoqi@0 | 867 | if((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) { |
aoqi@0 | 868 | // Can't reserve heap below 4Gb. |
aoqi@0 | 869 | Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
aoqi@0 | 870 | } else { |
aoqi@0 | 871 | Universe::set_narrow_oop_shift(0); |
aoqi@0 | 872 | if (verbose) { |
aoqi@0 | 873 | tty->print(", %s", narrow_oop_mode_to_string(UnscaledNarrowOop)); |
aoqi@0 | 874 | } |
aoqi@0 | 875 | } |
aoqi@0 | 876 | } |
aoqi@0 | 877 | |
aoqi@0 | 878 | if (verbose) { |
aoqi@0 | 879 | tty->cr(); |
aoqi@0 | 880 | tty->cr(); |
aoqi@0 | 881 | } |
aoqi@0 | 882 | Universe::set_narrow_ptrs_base(Universe::narrow_oop_base()); |
aoqi@0 | 883 | } |
aoqi@0 | 884 | // Universe::narrow_oop_base() is one page below the heap. |
aoqi@0 | 885 | assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - |
aoqi@0 | 886 | os::vm_page_size()) || |
aoqi@0 | 887 | Universe::narrow_oop_base() == NULL, "invalid value"); |
aoqi@0 | 888 | assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes || |
aoqi@0 | 889 | Universe::narrow_oop_shift() == 0, "invalid value"); |
aoqi@0 | 890 | #endif |
aoqi@0 | 891 | |
aoqi@0 | 892 | // We will never reach the CATCH below since Exceptions::_throw will cause |
aoqi@0 | 893 | // the VM to exit if an exception is thrown during initialization |
aoqi@0 | 894 | |
aoqi@0 | 895 | if (UseTLAB) { |
aoqi@0 | 896 | assert(Universe::heap()->supports_tlab_allocation(), |
aoqi@0 | 897 | "Should support thread-local allocation buffers"); |
aoqi@0 | 898 | ThreadLocalAllocBuffer::startup_initialization(); |
aoqi@0 | 899 | } |
aoqi@0 | 900 | return JNI_OK; |
aoqi@0 | 901 | } |
aoqi@0 | 902 | |
aoqi@0 | 903 | |
aoqi@0 | 904 | // Reserve the Java heap, which is now the same for all GCs. |
aoqi@0 | 905 | ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) { |
aoqi@0 | 906 | assert(alignment <= Arguments::conservative_max_heap_alignment(), |
aoqi@0 | 907 | err_msg("actual alignment "SIZE_FORMAT" must be within maximum heap alignment "SIZE_FORMAT, |
aoqi@0 | 908 | alignment, Arguments::conservative_max_heap_alignment())); |
aoqi@0 | 909 | size_t total_reserved = align_size_up(heap_size, alignment); |
aoqi@0 | 910 | assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())), |
aoqi@0 | 911 | "heap size is too big for compressed oops"); |
aoqi@0 | 912 | |
aoqi@0 | 913 | bool use_large_pages = UseLargePages && is_size_aligned(alignment, os::large_page_size()); |
aoqi@0 | 914 | assert(!UseLargePages |
aoqi@0 | 915 | || UseParallelGC |
aoqi@0 | 916 | || use_large_pages, "Wrong alignment to use large pages"); |
aoqi@0 | 917 | |
aoqi@0 | 918 | char* addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::UnscaledNarrowOop); |
aoqi@0 | 919 | |
aoqi@0 | 920 | ReservedHeapSpace total_rs(total_reserved, alignment, use_large_pages, addr); |
aoqi@0 | 921 | |
aoqi@0 | 922 | if (UseCompressedOops) { |
aoqi@0 | 923 | if (addr != NULL && !total_rs.is_reserved()) { |
aoqi@0 | 924 | // Failed to reserve at specified address - the requested memory |
aoqi@0 | 925 | // region is taken already, for example, by 'java' launcher. |
aoqi@0 | 926 | // Try again to reserver heap higher. |
aoqi@0 | 927 | addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::ZeroBasedNarrowOop); |
aoqi@0 | 928 | |
aoqi@0 | 929 | ReservedHeapSpace total_rs0(total_reserved, alignment, |
aoqi@0 | 930 | use_large_pages, addr); |
aoqi@0 | 931 | |
aoqi@0 | 932 | if (addr != NULL && !total_rs0.is_reserved()) { |
aoqi@0 | 933 | // Failed to reserve at specified address again - give up. |
aoqi@0 | 934 | addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::HeapBasedNarrowOop); |
aoqi@0 | 935 | assert(addr == NULL, ""); |
aoqi@0 | 936 | |
aoqi@0 | 937 | ReservedHeapSpace total_rs1(total_reserved, alignment, |
aoqi@0 | 938 | use_large_pages, addr); |
aoqi@0 | 939 | total_rs = total_rs1; |
aoqi@0 | 940 | } else { |
aoqi@0 | 941 | total_rs = total_rs0; |
aoqi@0 | 942 | } |
aoqi@0 | 943 | } |
aoqi@0 | 944 | } |
aoqi@0 | 945 | |
aoqi@0 | 946 | if (!total_rs.is_reserved()) { |
aoqi@0 | 947 | vm_exit_during_initialization(err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap", total_reserved/K)); |
aoqi@0 | 948 | return total_rs; |
aoqi@0 | 949 | } |
aoqi@0 | 950 | |
aoqi@0 | 951 | if (UseCompressedOops) { |
aoqi@0 | 952 | // Universe::initialize_heap() will reset this to NULL if unscaled |
aoqi@0 | 953 | // or zero-based narrow oops are actually used. |
aoqi@0 | 954 | address base = (address)(total_rs.base() - os::vm_page_size()); |
aoqi@0 | 955 | Universe::set_narrow_oop_base(base); |
aoqi@0 | 956 | } |
aoqi@0 | 957 | return total_rs; |
aoqi@0 | 958 | } |
aoqi@0 | 959 | |
aoqi@0 | 960 | |
aoqi@0 | 961 | // It's the caller's responsibility to ensure glitch-freedom |
aoqi@0 | 962 | // (if required). |
aoqi@0 | 963 | void Universe::update_heap_info_at_gc() { |
aoqi@0 | 964 | _heap_capacity_at_last_gc = heap()->capacity(); |
aoqi@0 | 965 | _heap_used_at_last_gc = heap()->used(); |
aoqi@0 | 966 | } |
aoqi@0 | 967 | |
aoqi@0 | 968 | |
aoqi@0 | 969 | const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) { |
aoqi@0 | 970 | switch (mode) { |
aoqi@0 | 971 | case UnscaledNarrowOop: |
aoqi@0 | 972 | return "32-bits Oops"; |
aoqi@0 | 973 | case ZeroBasedNarrowOop: |
aoqi@0 | 974 | return "zero based Compressed Oops"; |
aoqi@0 | 975 | case HeapBasedNarrowOop: |
aoqi@0 | 976 | return "Compressed Oops with base"; |
aoqi@0 | 977 | } |
aoqi@0 | 978 | |
aoqi@0 | 979 | ShouldNotReachHere(); |
aoqi@0 | 980 | return ""; |
aoqi@0 | 981 | } |
aoqi@0 | 982 | |
aoqi@0 | 983 | |
aoqi@0 | 984 | Universe::NARROW_OOP_MODE Universe::narrow_oop_mode() { |
aoqi@0 | 985 | if (narrow_oop_base() != 0) { |
aoqi@0 | 986 | return HeapBasedNarrowOop; |
aoqi@0 | 987 | } |
aoqi@0 | 988 | |
aoqi@0 | 989 | if (narrow_oop_shift() != 0) { |
aoqi@0 | 990 | return ZeroBasedNarrowOop; |
aoqi@0 | 991 | } |
aoqi@0 | 992 | |
aoqi@0 | 993 | return UnscaledNarrowOop; |
aoqi@0 | 994 | } |
aoqi@0 | 995 | |
aoqi@0 | 996 | |
aoqi@0 | 997 | void universe2_init() { |
aoqi@0 | 998 | EXCEPTION_MARK; |
aoqi@0 | 999 | Universe::genesis(CATCH); |
aoqi@0 | 1000 | } |
aoqi@0 | 1001 | |
aoqi@0 | 1002 | |
aoqi@0 | 1003 | // This function is defined in JVM.cpp |
aoqi@0 | 1004 | extern void initialize_converter_functions(); |
aoqi@0 | 1005 | |
aoqi@0 | 1006 | bool universe_post_init() { |
aoqi@0 | 1007 | assert(!is_init_completed(), "Error: initialization not yet completed!"); |
aoqi@0 | 1008 | Universe::_fully_initialized = true; |
aoqi@0 | 1009 | EXCEPTION_MARK; |
aoqi@0 | 1010 | { ResourceMark rm; |
aoqi@0 | 1011 | Interpreter::initialize(); // needed for interpreter entry points |
aoqi@0 | 1012 | if (!UseSharedSpaces) { |
aoqi@0 | 1013 | HandleMark hm(THREAD); |
aoqi@0 | 1014 | KlassHandle ok_h(THREAD, SystemDictionary::Object_klass()); |
aoqi@0 | 1015 | Universe::reinitialize_vtable_of(ok_h, CHECK_false); |
aoqi@0 | 1016 | Universe::reinitialize_itables(CHECK_false); |
aoqi@0 | 1017 | } |
aoqi@0 | 1018 | } |
aoqi@0 | 1019 | |
aoqi@0 | 1020 | HandleMark hm(THREAD); |
aoqi@0 | 1021 | Klass* k; |
aoqi@0 | 1022 | instanceKlassHandle k_h; |
aoqi@0 | 1023 | // Setup preallocated empty java.lang.Class array |
aoqi@0 | 1024 | Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false); |
aoqi@0 | 1025 | |
aoqi@0 | 1026 | // Setup preallocated OutOfMemoryError errors |
aoqi@0 | 1027 | k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false); |
aoqi@0 | 1028 | k_h = instanceKlassHandle(THREAD, k); |
aoqi@0 | 1029 | Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false); |
aoqi@0 | 1030 | Universe::_out_of_memory_error_metaspace = k_h->allocate_instance(CHECK_false); |
aoqi@0 | 1031 | Universe::_out_of_memory_error_class_metaspace = k_h->allocate_instance(CHECK_false); |
aoqi@0 | 1032 | Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false); |
aoqi@0 | 1033 | Universe::_out_of_memory_error_gc_overhead_limit = |
aoqi@0 | 1034 | k_h->allocate_instance(CHECK_false); |
aoqi@0 | 1035 | |
aoqi@0 | 1036 | // Setup preallocated NullPointerException |
aoqi@0 | 1037 | // (this is currently used for a cheap & dirty solution in compiler exception handling) |
aoqi@0 | 1038 | k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false); |
aoqi@0 | 1039 | Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
aoqi@0 | 1040 | // Setup preallocated ArithmeticException |
aoqi@0 | 1041 | // (this is currently used for a cheap & dirty solution in compiler exception handling) |
aoqi@0 | 1042 | k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false); |
aoqi@0 | 1043 | Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
aoqi@0 | 1044 | // Virtual Machine Error for when we get into a situation we can't resolve |
aoqi@0 | 1045 | k = SystemDictionary::resolve_or_fail( |
aoqi@0 | 1046 | vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false); |
aoqi@0 | 1047 | bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false); |
aoqi@0 | 1048 | if (!linked) { |
aoqi@0 | 1049 | tty->print_cr("Unable to link/verify VirtualMachineError class"); |
aoqi@0 | 1050 | return false; // initialization failed |
aoqi@0 | 1051 | } |
aoqi@0 | 1052 | Universe::_virtual_machine_error_instance = |
aoqi@0 | 1053 | InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
aoqi@0 | 1054 | |
aoqi@0 | 1055 | Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
aoqi@0 | 1056 | |
aoqi@0 | 1057 | if (!DumpSharedSpaces) { |
aoqi@0 | 1058 | // These are the only Java fields that are currently set during shared space dumping. |
aoqi@0 | 1059 | // We prefer to not handle this generally, so we always reinitialize these detail messages. |
aoqi@0 | 1060 | Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false); |
aoqi@0 | 1061 | java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg()); |
aoqi@0 | 1062 | |
aoqi@0 | 1063 | msg = java_lang_String::create_from_str("Metaspace", CHECK_false); |
aoqi@0 | 1064 | java_lang_Throwable::set_message(Universe::_out_of_memory_error_metaspace, msg()); |
aoqi@0 | 1065 | msg = java_lang_String::create_from_str("Compressed class space", CHECK_false); |
aoqi@0 | 1066 | java_lang_Throwable::set_message(Universe::_out_of_memory_error_class_metaspace, msg()); |
aoqi@0 | 1067 | |
aoqi@0 | 1068 | msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false); |
aoqi@0 | 1069 | java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg()); |
aoqi@0 | 1070 | |
aoqi@0 | 1071 | msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false); |
aoqi@0 | 1072 | java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg()); |
aoqi@0 | 1073 | |
aoqi@0 | 1074 | msg = java_lang_String::create_from_str("/ by zero", CHECK_false); |
aoqi@0 | 1075 | java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg()); |
aoqi@0 | 1076 | |
aoqi@0 | 1077 | // Setup the array of errors that have preallocated backtrace |
aoqi@0 | 1078 | k = Universe::_out_of_memory_error_java_heap->klass(); |
aoqi@0 | 1079 | assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error"); |
aoqi@0 | 1080 | k_h = instanceKlassHandle(THREAD, k); |
aoqi@0 | 1081 | |
aoqi@0 | 1082 | int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0; |
aoqi@0 | 1083 | Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false); |
aoqi@0 | 1084 | for (int i=0; i<len; i++) { |
aoqi@0 | 1085 | oop err = k_h->allocate_instance(CHECK_false); |
aoqi@0 | 1086 | Handle err_h = Handle(THREAD, err); |
aoqi@0 | 1087 | java_lang_Throwable::allocate_backtrace(err_h, CHECK_false); |
aoqi@0 | 1088 | Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h()); |
aoqi@0 | 1089 | } |
aoqi@0 | 1090 | Universe::_preallocated_out_of_memory_error_avail_count = (jint)len; |
aoqi@0 | 1091 | } |
aoqi@0 | 1092 | |
aoqi@0 | 1093 | |
aoqi@0 | 1094 | // Setup static method for registering finalizers |
aoqi@0 | 1095 | // The finalizer klass must be linked before looking up the method, in |
aoqi@0 | 1096 | // case it needs to get rewritten. |
aoqi@0 | 1097 | InstanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false); |
aoqi@0 | 1098 | Method* m = InstanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method( |
aoqi@0 | 1099 | vmSymbols::register_method_name(), |
aoqi@0 | 1100 | vmSymbols::register_method_signature()); |
aoqi@0 | 1101 | if (m == NULL || !m->is_static()) { |
aoqi@0 | 1102 | tty->print_cr("Unable to link/verify Finalizer.register method"); |
aoqi@0 | 1103 | return false; // initialization failed (cannot throw exception yet) |
aoqi@0 | 1104 | } |
aoqi@0 | 1105 | Universe::_finalizer_register_cache->init( |
aoqi@0 | 1106 | SystemDictionary::Finalizer_klass(), m); |
aoqi@0 | 1107 | |
aoqi@0 | 1108 | InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->link_class(CHECK_false); |
aoqi@0 | 1109 | m = InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->find_method( |
aoqi@0 | 1110 | vmSymbols::throwIllegalAccessError_name(), |
aoqi@0 | 1111 | vmSymbols::void_method_signature()); |
aoqi@0 | 1112 | if (m != NULL && !m->is_static()) { |
aoqi@0 | 1113 | // Note null is okay; this method is used in itables, and if it is null, |
aoqi@0 | 1114 | // then AbstractMethodError is thrown instead. |
aoqi@0 | 1115 | tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method"); |
aoqi@0 | 1116 | return false; // initialization failed (cannot throw exception yet) |
aoqi@0 | 1117 | } |
aoqi@0 | 1118 | Universe::_throw_illegal_access_error = m; |
aoqi@0 | 1119 | |
aoqi@0 | 1120 | // Setup method for registering loaded classes in class loader vector |
aoqi@0 | 1121 | InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false); |
aoqi@0 | 1122 | m = InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature()); |
aoqi@0 | 1123 | if (m == NULL || m->is_static()) { |
aoqi@0 | 1124 | tty->print_cr("Unable to link/verify ClassLoader.addClass method"); |
aoqi@0 | 1125 | return false; // initialization failed (cannot throw exception yet) |
aoqi@0 | 1126 | } |
aoqi@0 | 1127 | Universe::_loader_addClass_cache->init( |
aoqi@0 | 1128 | SystemDictionary::ClassLoader_klass(), m); |
aoqi@0 | 1129 | |
aoqi@0 | 1130 | // Setup method for checking protection domain |
aoqi@0 | 1131 | InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())->link_class(CHECK_false); |
aoqi@0 | 1132 | m = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())-> |
aoqi@0 | 1133 | find_method(vmSymbols::impliesCreateAccessControlContext_name(), |
aoqi@0 | 1134 | vmSymbols::void_boolean_signature()); |
aoqi@0 | 1135 | // Allow NULL which should only happen with bootstrapping. |
aoqi@0 | 1136 | if (m != NULL) { |
aoqi@0 | 1137 | if (m->is_static()) { |
aoqi@0 | 1138 | // NoSuchMethodException doesn't actually work because it tries to run the |
aoqi@0 | 1139 | // <init> function before java_lang_Class is linked. Print error and exit. |
aoqi@0 | 1140 | tty->print_cr("ProtectionDomain.impliesCreateAccessControlContext() has the wrong linkage"); |
aoqi@0 | 1141 | return false; // initialization failed |
aoqi@0 | 1142 | } |
aoqi@0 | 1143 | Universe::_pd_implies_cache->init( |
aoqi@0 | 1144 | SystemDictionary::ProtectionDomain_klass(), m);; |
aoqi@0 | 1145 | } |
aoqi@0 | 1146 | |
aoqi@0 | 1147 | // The folowing is initializing converter functions for serialization in |
aoqi@0 | 1148 | // JVM.cpp. If we clean up the StrictMath code above we may want to find |
aoqi@0 | 1149 | // a better solution for this as well. |
aoqi@0 | 1150 | initialize_converter_functions(); |
aoqi@0 | 1151 | |
aoqi@0 | 1152 | // This needs to be done before the first scavenge/gc, since |
aoqi@0 | 1153 | // it's an input to soft ref clearing policy. |
aoqi@0 | 1154 | { |
aoqi@0 | 1155 | MutexLocker x(Heap_lock); |
aoqi@0 | 1156 | Universe::update_heap_info_at_gc(); |
aoqi@0 | 1157 | } |
aoqi@0 | 1158 | |
aoqi@0 | 1159 | // ("weak") refs processing infrastructure initialization |
aoqi@0 | 1160 | Universe::heap()->post_initialize(); |
aoqi@0 | 1161 | |
aoqi@0 | 1162 | // Initialize performance counters for metaspaces |
aoqi@0 | 1163 | MetaspaceCounters::initialize_performance_counters(); |
aoqi@0 | 1164 | CompressedClassSpaceCounters::initialize_performance_counters(); |
aoqi@0 | 1165 | |
aoqi@0 | 1166 | MemoryService::add_metaspace_memory_pools(); |
aoqi@0 | 1167 | |
aoqi@0 | 1168 | MemoryService::set_universe_heap(Universe::_collectedHeap); |
aoqi@0 | 1169 | return true; |
aoqi@0 | 1170 | } |
aoqi@0 | 1171 | |
aoqi@0 | 1172 | |
aoqi@0 | 1173 | void Universe::compute_base_vtable_size() { |
aoqi@0 | 1174 | _base_vtable_size = ClassLoader::compute_Object_vtable(); |
aoqi@0 | 1175 | } |
aoqi@0 | 1176 | |
aoqi@0 | 1177 | |
aoqi@0 | 1178 | // %%% The Universe::flush_foo methods belong in CodeCache. |
aoqi@0 | 1179 | |
aoqi@0 | 1180 | // Flushes compiled methods dependent on dependee. |
aoqi@0 | 1181 | void Universe::flush_dependents_on(instanceKlassHandle dependee) { |
aoqi@0 | 1182 | assert_lock_strong(Compile_lock); |
aoqi@0 | 1183 | |
aoqi@0 | 1184 | if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; |
aoqi@0 | 1185 | |
aoqi@0 | 1186 | // CodeCache can only be updated by a thread_in_VM and they will all be |
aoqi@0 | 1187 | // stopped dring the safepoint so CodeCache will be safe to update without |
aoqi@0 | 1188 | // holding the CodeCache_lock. |
aoqi@0 | 1189 | |
aoqi@0 | 1190 | KlassDepChange changes(dependee); |
aoqi@0 | 1191 | |
aoqi@0 | 1192 | // Compute the dependent nmethods |
aoqi@0 | 1193 | if (CodeCache::mark_for_deoptimization(changes) > 0) { |
aoqi@0 | 1194 | // At least one nmethod has been marked for deoptimization |
aoqi@0 | 1195 | VM_Deoptimize op; |
aoqi@0 | 1196 | VMThread::execute(&op); |
aoqi@0 | 1197 | } |
aoqi@0 | 1198 | } |
aoqi@0 | 1199 | |
aoqi@0 | 1200 | // Flushes compiled methods dependent on a particular CallSite |
aoqi@0 | 1201 | // instance when its target is different than the given MethodHandle. |
aoqi@0 | 1202 | void Universe::flush_dependents_on(Handle call_site, Handle method_handle) { |
aoqi@0 | 1203 | assert_lock_strong(Compile_lock); |
aoqi@0 | 1204 | |
aoqi@0 | 1205 | if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; |
aoqi@0 | 1206 | |
aoqi@0 | 1207 | // CodeCache can only be updated by a thread_in_VM and they will all be |
aoqi@0 | 1208 | // stopped dring the safepoint so CodeCache will be safe to update without |
aoqi@0 | 1209 | // holding the CodeCache_lock. |
aoqi@0 | 1210 | |
aoqi@0 | 1211 | CallSiteDepChange changes(call_site(), method_handle()); |
aoqi@0 | 1212 | |
aoqi@0 | 1213 | // Compute the dependent nmethods that have a reference to a |
aoqi@0 | 1214 | // CallSite object. We use InstanceKlass::mark_dependent_nmethod |
aoqi@0 | 1215 | // directly instead of CodeCache::mark_for_deoptimization because we |
aoqi@0 | 1216 | // want dependents on the call site class only not all classes in |
aoqi@0 | 1217 | // the ContextStream. |
aoqi@0 | 1218 | int marked = 0; |
aoqi@0 | 1219 | { |
aoqi@0 | 1220 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
aoqi@0 | 1221 | InstanceKlass* call_site_klass = InstanceKlass::cast(call_site->klass()); |
aoqi@0 | 1222 | marked = call_site_klass->mark_dependent_nmethods(changes); |
aoqi@0 | 1223 | } |
aoqi@0 | 1224 | if (marked > 0) { |
aoqi@0 | 1225 | // At least one nmethod has been marked for deoptimization |
aoqi@0 | 1226 | VM_Deoptimize op; |
aoqi@0 | 1227 | VMThread::execute(&op); |
aoqi@0 | 1228 | } |
aoqi@0 | 1229 | } |
aoqi@0 | 1230 | |
aoqi@0 | 1231 | #ifdef HOTSWAP |
aoqi@0 | 1232 | // Flushes compiled methods dependent on dependee in the evolutionary sense |
aoqi@0 | 1233 | void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) { |
aoqi@0 | 1234 | // --- Compile_lock is not held. However we are at a safepoint. |
aoqi@0 | 1235 | assert_locked_or_safepoint(Compile_lock); |
aoqi@0 | 1236 | if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; |
aoqi@0 | 1237 | |
aoqi@0 | 1238 | // CodeCache can only be updated by a thread_in_VM and they will all be |
aoqi@0 | 1239 | // stopped dring the safepoint so CodeCache will be safe to update without |
aoqi@0 | 1240 | // holding the CodeCache_lock. |
aoqi@0 | 1241 | |
aoqi@0 | 1242 | // Compute the dependent nmethods |
aoqi@0 | 1243 | if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) { |
aoqi@0 | 1244 | // At least one nmethod has been marked for deoptimization |
aoqi@0 | 1245 | |
aoqi@0 | 1246 | // All this already happens inside a VM_Operation, so we'll do all the work here. |
aoqi@0 | 1247 | // Stuff copied from VM_Deoptimize and modified slightly. |
aoqi@0 | 1248 | |
aoqi@0 | 1249 | // We do not want any GCs to happen while we are in the middle of this VM operation |
aoqi@0 | 1250 | ResourceMark rm; |
aoqi@0 | 1251 | DeoptimizationMarker dm; |
aoqi@0 | 1252 | |
aoqi@0 | 1253 | // Deoptimize all activations depending on marked nmethods |
aoqi@0 | 1254 | Deoptimization::deoptimize_dependents(); |
aoqi@0 | 1255 | |
aoqi@0 | 1256 | // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) |
aoqi@0 | 1257 | CodeCache::make_marked_nmethods_not_entrant(); |
aoqi@0 | 1258 | } |
aoqi@0 | 1259 | } |
aoqi@0 | 1260 | #endif // HOTSWAP |
aoqi@0 | 1261 | |
aoqi@0 | 1262 | |
aoqi@0 | 1263 | // Flushes compiled methods dependent on dependee |
aoqi@0 | 1264 | void Universe::flush_dependents_on_method(methodHandle m_h) { |
aoqi@0 | 1265 | // --- Compile_lock is not held. However we are at a safepoint. |
aoqi@0 | 1266 | assert_locked_or_safepoint(Compile_lock); |
aoqi@0 | 1267 | |
aoqi@0 | 1268 | // CodeCache can only be updated by a thread_in_VM and they will all be |
aoqi@0 | 1269 | // stopped dring the safepoint so CodeCache will be safe to update without |
aoqi@0 | 1270 | // holding the CodeCache_lock. |
aoqi@0 | 1271 | |
aoqi@0 | 1272 | // Compute the dependent nmethods |
aoqi@0 | 1273 | if (CodeCache::mark_for_deoptimization(m_h()) > 0) { |
aoqi@0 | 1274 | // At least one nmethod has been marked for deoptimization |
aoqi@0 | 1275 | |
aoqi@0 | 1276 | // All this already happens inside a VM_Operation, so we'll do all the work here. |
aoqi@0 | 1277 | // Stuff copied from VM_Deoptimize and modified slightly. |
aoqi@0 | 1278 | |
aoqi@0 | 1279 | // We do not want any GCs to happen while we are in the middle of this VM operation |
aoqi@0 | 1280 | ResourceMark rm; |
aoqi@0 | 1281 | DeoptimizationMarker dm; |
aoqi@0 | 1282 | |
aoqi@0 | 1283 | // Deoptimize all activations depending on marked nmethods |
aoqi@0 | 1284 | Deoptimization::deoptimize_dependents(); |
aoqi@0 | 1285 | |
aoqi@0 | 1286 | // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) |
aoqi@0 | 1287 | CodeCache::make_marked_nmethods_not_entrant(); |
aoqi@0 | 1288 | } |
aoqi@0 | 1289 | } |
aoqi@0 | 1290 | |
aoqi@0 | 1291 | void Universe::print() { |
aoqi@0 | 1292 | print_on(gclog_or_tty); |
aoqi@0 | 1293 | } |
aoqi@0 | 1294 | |
aoqi@0 | 1295 | void Universe::print_on(outputStream* st, bool extended) { |
aoqi@0 | 1296 | st->print_cr("Heap"); |
aoqi@0 | 1297 | if (!extended) { |
aoqi@0 | 1298 | heap()->print_on(st); |
aoqi@0 | 1299 | } else { |
aoqi@0 | 1300 | heap()->print_extended_on(st); |
aoqi@0 | 1301 | } |
aoqi@0 | 1302 | } |
aoqi@0 | 1303 | |
aoqi@0 | 1304 | void Universe::print_heap_at_SIGBREAK() { |
aoqi@0 | 1305 | if (PrintHeapAtSIGBREAK) { |
aoqi@0 | 1306 | MutexLocker hl(Heap_lock); |
aoqi@0 | 1307 | print_on(tty); |
aoqi@0 | 1308 | tty->cr(); |
aoqi@0 | 1309 | tty->flush(); |
aoqi@0 | 1310 | } |
aoqi@0 | 1311 | } |
aoqi@0 | 1312 | |
aoqi@0 | 1313 | void Universe::print_heap_before_gc(outputStream* st, bool ignore_extended) { |
aoqi@0 | 1314 | st->print_cr("{Heap before GC invocations=%u (full %u):", |
aoqi@0 | 1315 | heap()->total_collections(), |
aoqi@0 | 1316 | heap()->total_full_collections()); |
aoqi@0 | 1317 | if (!PrintHeapAtGCExtended || ignore_extended) { |
aoqi@0 | 1318 | heap()->print_on(st); |
aoqi@0 | 1319 | } else { |
aoqi@0 | 1320 | heap()->print_extended_on(st); |
aoqi@0 | 1321 | } |
aoqi@0 | 1322 | } |
aoqi@0 | 1323 | |
aoqi@0 | 1324 | void Universe::print_heap_after_gc(outputStream* st, bool ignore_extended) { |
aoqi@0 | 1325 | st->print_cr("Heap after GC invocations=%u (full %u):", |
aoqi@0 | 1326 | heap()->total_collections(), |
aoqi@0 | 1327 | heap()->total_full_collections()); |
aoqi@0 | 1328 | if (!PrintHeapAtGCExtended || ignore_extended) { |
aoqi@0 | 1329 | heap()->print_on(st); |
aoqi@0 | 1330 | } else { |
aoqi@0 | 1331 | heap()->print_extended_on(st); |
aoqi@0 | 1332 | } |
aoqi@0 | 1333 | st->print_cr("}"); |
aoqi@0 | 1334 | } |
aoqi@0 | 1335 | |
aoqi@0 | 1336 | void Universe::verify(VerifyOption option, const char* prefix, bool silent) { |
aoqi@0 | 1337 | // The use of _verify_in_progress is a temporary work around for |
aoqi@0 | 1338 | // 6320749. Don't bother with a creating a class to set and clear |
aoqi@0 | 1339 | // it since it is only used in this method and the control flow is |
aoqi@0 | 1340 | // straight forward. |
aoqi@0 | 1341 | _verify_in_progress = true; |
aoqi@0 | 1342 | |
aoqi@0 | 1343 | COMPILER2_PRESENT( |
aoqi@0 | 1344 | assert(!DerivedPointerTable::is_active(), |
aoqi@0 | 1345 | "DPT should not be active during verification " |
aoqi@0 | 1346 | "(of thread stacks below)"); |
aoqi@0 | 1347 | ) |
aoqi@0 | 1348 | |
aoqi@0 | 1349 | ResourceMark rm; |
aoqi@0 | 1350 | HandleMark hm; // Handles created during verification can be zapped |
aoqi@0 | 1351 | _verify_count++; |
aoqi@0 | 1352 | |
aoqi@0 | 1353 | if (!silent) gclog_or_tty->print("%s", prefix); |
aoqi@0 | 1354 | if (!silent) gclog_or_tty->print("[Verifying "); |
aoqi@0 | 1355 | if (!silent) gclog_or_tty->print("threads "); |
aoqi@0 | 1356 | Threads::verify(); |
aoqi@0 | 1357 | if (!silent) gclog_or_tty->print("heap "); |
aoqi@0 | 1358 | heap()->verify(silent, option); |
aoqi@0 | 1359 | if (!silent) gclog_or_tty->print("syms "); |
aoqi@0 | 1360 | SymbolTable::verify(); |
aoqi@0 | 1361 | if (!silent) gclog_or_tty->print("strs "); |
aoqi@0 | 1362 | StringTable::verify(); |
aoqi@0 | 1363 | { |
aoqi@0 | 1364 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
aoqi@0 | 1365 | if (!silent) gclog_or_tty->print("zone "); |
aoqi@0 | 1366 | CodeCache::verify(); |
aoqi@0 | 1367 | } |
aoqi@0 | 1368 | if (!silent) gclog_or_tty->print("dict "); |
aoqi@0 | 1369 | SystemDictionary::verify(); |
aoqi@0 | 1370 | #ifndef PRODUCT |
aoqi@0 | 1371 | if (!silent) gclog_or_tty->print("cldg "); |
aoqi@0 | 1372 | ClassLoaderDataGraph::verify(); |
aoqi@0 | 1373 | #endif |
aoqi@0 | 1374 | if (!silent) gclog_or_tty->print("metaspace chunks "); |
aoqi@0 | 1375 | MetaspaceAux::verify_free_chunks(); |
aoqi@0 | 1376 | if (!silent) gclog_or_tty->print("hand "); |
aoqi@0 | 1377 | JNIHandles::verify(); |
aoqi@0 | 1378 | if (!silent) gclog_or_tty->print("C-heap "); |
aoqi@0 | 1379 | os::check_heap(); |
aoqi@0 | 1380 | if (!silent) gclog_or_tty->print("code cache "); |
aoqi@0 | 1381 | CodeCache::verify_oops(); |
aoqi@0 | 1382 | if (!silent) gclog_or_tty->print_cr("]"); |
aoqi@0 | 1383 | |
aoqi@0 | 1384 | _verify_in_progress = false; |
aoqi@0 | 1385 | } |
aoqi@0 | 1386 | |
aoqi@0 | 1387 | // Oop verification (see MacroAssembler::verify_oop) |
aoqi@0 | 1388 | |
aoqi@0 | 1389 | static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1}; |
aoqi@0 | 1390 | static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1}; |
aoqi@0 | 1391 | |
aoqi@0 | 1392 | |
aoqi@0 | 1393 | #ifndef PRODUCT |
aoqi@0 | 1394 | |
aoqi@0 | 1395 | static void calculate_verify_data(uintptr_t verify_data[2], |
aoqi@0 | 1396 | HeapWord* low_boundary, |
aoqi@0 | 1397 | HeapWord* high_boundary) { |
aoqi@0 | 1398 | assert(low_boundary < high_boundary, "bad interval"); |
aoqi@0 | 1399 | |
aoqi@0 | 1400 | // decide which low-order bits we require to be clear: |
aoqi@0 | 1401 | size_t alignSize = MinObjAlignmentInBytes; |
aoqi@0 | 1402 | size_t min_object_size = CollectedHeap::min_fill_size(); |
aoqi@0 | 1403 | |
aoqi@0 | 1404 | // make an inclusive limit: |
aoqi@0 | 1405 | uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize; |
aoqi@0 | 1406 | uintptr_t min = (uintptr_t)low_boundary; |
aoqi@0 | 1407 | assert(min < max, "bad interval"); |
aoqi@0 | 1408 | uintptr_t diff = max ^ min; |
aoqi@0 | 1409 | |
aoqi@0 | 1410 | // throw away enough low-order bits to make the diff vanish |
aoqi@0 | 1411 | uintptr_t mask = (uintptr_t)(-1); |
aoqi@0 | 1412 | while ((mask & diff) != 0) |
aoqi@0 | 1413 | mask <<= 1; |
aoqi@0 | 1414 | uintptr_t bits = (min & mask); |
aoqi@0 | 1415 | assert(bits == (max & mask), "correct mask"); |
aoqi@0 | 1416 | // check an intermediate value between min and max, just to make sure: |
aoqi@0 | 1417 | assert(bits == ((min + (max-min)/2) & mask), "correct mask"); |
aoqi@0 | 1418 | |
aoqi@0 | 1419 | // require address alignment, too: |
aoqi@0 | 1420 | mask |= (alignSize - 1); |
aoqi@0 | 1421 | |
aoqi@0 | 1422 | if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) { |
aoqi@0 | 1423 | assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability"); |
aoqi@0 | 1424 | } |
aoqi@0 | 1425 | verify_data[0] = mask; |
aoqi@0 | 1426 | verify_data[1] = bits; |
aoqi@0 | 1427 | } |
aoqi@0 | 1428 | |
aoqi@0 | 1429 | // Oop verification (see MacroAssembler::verify_oop) |
aoqi@0 | 1430 | |
aoqi@0 | 1431 | uintptr_t Universe::verify_oop_mask() { |
aoqi@0 | 1432 | MemRegion m = heap()->reserved_region(); |
aoqi@0 | 1433 | calculate_verify_data(_verify_oop_data, |
aoqi@0 | 1434 | m.start(), |
aoqi@0 | 1435 | m.end()); |
aoqi@0 | 1436 | return _verify_oop_data[0]; |
aoqi@0 | 1437 | } |
aoqi@0 | 1438 | |
aoqi@0 | 1439 | |
aoqi@0 | 1440 | |
aoqi@0 | 1441 | uintptr_t Universe::verify_oop_bits() { |
aoqi@0 | 1442 | verify_oop_mask(); |
aoqi@0 | 1443 | return _verify_oop_data[1]; |
aoqi@0 | 1444 | } |
aoqi@0 | 1445 | |
aoqi@0 | 1446 | uintptr_t Universe::verify_mark_mask() { |
aoqi@0 | 1447 | return markOopDesc::lock_mask_in_place; |
aoqi@0 | 1448 | } |
aoqi@0 | 1449 | |
aoqi@0 | 1450 | uintptr_t Universe::verify_mark_bits() { |
aoqi@0 | 1451 | intptr_t mask = verify_mark_mask(); |
aoqi@0 | 1452 | intptr_t bits = (intptr_t)markOopDesc::prototype(); |
aoqi@0 | 1453 | assert((bits & ~mask) == 0, "no stray header bits"); |
aoqi@0 | 1454 | return bits; |
aoqi@0 | 1455 | } |
aoqi@0 | 1456 | #endif // PRODUCT |
aoqi@0 | 1457 | |
aoqi@0 | 1458 | |
aoqi@0 | 1459 | void Universe::compute_verify_oop_data() { |
aoqi@0 | 1460 | verify_oop_mask(); |
aoqi@0 | 1461 | verify_oop_bits(); |
aoqi@0 | 1462 | verify_mark_mask(); |
aoqi@0 | 1463 | verify_mark_bits(); |
aoqi@0 | 1464 | } |
aoqi@0 | 1465 | |
aoqi@0 | 1466 | |
aoqi@0 | 1467 | void LatestMethodCache::init(Klass* k, Method* m) { |
aoqi@0 | 1468 | if (!UseSharedSpaces) { |
aoqi@0 | 1469 | _klass = k; |
aoqi@0 | 1470 | } |
aoqi@0 | 1471 | #ifndef PRODUCT |
aoqi@0 | 1472 | else { |
aoqi@0 | 1473 | // sharing initilization should have already set up _klass |
aoqi@0 | 1474 | assert(_klass != NULL, "just checking"); |
aoqi@0 | 1475 | } |
aoqi@0 | 1476 | #endif |
aoqi@0 | 1477 | |
aoqi@0 | 1478 | _method_idnum = m->method_idnum(); |
aoqi@0 | 1479 | assert(_method_idnum >= 0, "sanity check"); |
aoqi@0 | 1480 | } |
aoqi@0 | 1481 | |
aoqi@0 | 1482 | |
aoqi@0 | 1483 | Method* LatestMethodCache::get_method() { |
aoqi@0 | 1484 | if (klass() == NULL) return NULL; |
aoqi@0 | 1485 | InstanceKlass* ik = InstanceKlass::cast(klass()); |
aoqi@0 | 1486 | Method* m = ik->method_with_idnum(method_idnum()); |
aoqi@0 | 1487 | assert(m != NULL, "sanity check"); |
aoqi@0 | 1488 | return m; |
aoqi@0 | 1489 | } |
aoqi@0 | 1490 | |
aoqi@0 | 1491 | |
aoqi@0 | 1492 | #ifdef ASSERT |
aoqi@0 | 1493 | // Release dummy object(s) at bottom of heap |
aoqi@0 | 1494 | bool Universe::release_fullgc_alot_dummy() { |
aoqi@0 | 1495 | MutexLocker ml(FullGCALot_lock); |
aoqi@0 | 1496 | if (_fullgc_alot_dummy_array != NULL) { |
aoqi@0 | 1497 | if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) { |
aoqi@0 | 1498 | // No more dummies to release, release entire array instead |
aoqi@0 | 1499 | _fullgc_alot_dummy_array = NULL; |
aoqi@0 | 1500 | return false; |
aoqi@0 | 1501 | } |
aoqi@0 | 1502 | if (!UseConcMarkSweepGC) { |
aoqi@0 | 1503 | // Release dummy at bottom of old generation |
aoqi@0 | 1504 | _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); |
aoqi@0 | 1505 | } |
aoqi@0 | 1506 | // Release dummy at bottom of permanent generation |
aoqi@0 | 1507 | _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); |
aoqi@0 | 1508 | } |
aoqi@0 | 1509 | return true; |
aoqi@0 | 1510 | } |
aoqi@0 | 1511 | |
aoqi@0 | 1512 | #endif // ASSERT |