Mercurial > hg > truffle
annotate src/share/vm/memory/universe.cpp @ 2080:c04052fd6ae1
7006505: Use kstat info to identify SPARC processor
Summary: read Solaris kstat data to get more precise CPU information
Reviewed-by: iveresov, never, twisti, dholmes
| author | kvn |
|---|---|
| date | Thu, 16 Dec 2010 14:15:12 -0800 |
| parents | f95d63e2154a |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/classLoader.hpp" | |
| 27 #include "classfile/javaClasses.hpp" | |
| 28 #include "classfile/symbolTable.hpp" | |
| 29 #include "classfile/systemDictionary.hpp" | |
| 30 #include "classfile/vmSymbols.hpp" | |
| 31 #include "code/codeCache.hpp" | |
| 32 #include "code/dependencies.hpp" | |
| 33 #include "gc_interface/collectedHeap.inline.hpp" | |
| 34 #include "interpreter/interpreter.hpp" | |
| 35 #include "memory/cardTableModRefBS.hpp" | |
| 36 #include "memory/filemap.hpp" | |
| 37 #include "memory/gcLocker.inline.hpp" | |
| 38 #include "memory/genCollectedHeap.hpp" | |
| 39 #include "memory/genRemSet.hpp" | |
| 40 #include "memory/generation.hpp" | |
| 41 #include "memory/oopFactory.hpp" | |
| 42 #include "memory/permGen.hpp" | |
| 43 #include "memory/space.hpp" | |
| 44 #include "memory/universe.hpp" | |
| 45 #include "memory/universe.inline.hpp" | |
| 46 #include "oops/arrayKlassKlass.hpp" | |
| 47 #include "oops/compiledICHolderKlass.hpp" | |
| 48 #include "oops/constMethodKlass.hpp" | |
| 49 #include "oops/constantPoolKlass.hpp" | |
| 50 #include "oops/constantPoolOop.hpp" | |
| 51 #include "oops/cpCacheKlass.hpp" | |
| 52 #include "oops/cpCacheOop.hpp" | |
| 53 #include "oops/instanceKlass.hpp" | |
| 54 #include "oops/instanceKlassKlass.hpp" | |
| 55 #include "oops/instanceRefKlass.hpp" | |
| 56 #include "oops/klassKlass.hpp" | |
| 57 #include "oops/klassOop.hpp" | |
| 58 #include "oops/methodDataKlass.hpp" | |
| 59 #include "oops/methodKlass.hpp" | |
| 60 #include "oops/objArrayKlassKlass.hpp" | |
| 61 #include "oops/oop.inline.hpp" | |
| 62 #include "oops/symbolKlass.hpp" | |
| 63 #include "oops/typeArrayKlass.hpp" | |
| 64 #include "oops/typeArrayKlassKlass.hpp" | |
| 65 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
| 66 #include "runtime/aprofiler.hpp" | |
| 67 #include "runtime/arguments.hpp" | |
| 68 #include "runtime/deoptimization.hpp" | |
| 69 #include "runtime/fprofiler.hpp" | |
| 70 #include "runtime/handles.inline.hpp" | |
| 71 #include "runtime/init.hpp" | |
| 72 #include "runtime/java.hpp" | |
| 73 #include "runtime/javaCalls.hpp" | |
| 74 #include "runtime/sharedRuntime.hpp" | |
| 75 #include "runtime/synchronizer.hpp" | |
| 76 #include "runtime/timer.hpp" | |
| 77 #include "runtime/vm_operations.hpp" | |
| 78 #include "services/memoryService.hpp" | |
| 79 #include "utilities/copy.hpp" | |
| 80 #include "utilities/events.hpp" | |
| 81 #include "utilities/hashtable.inline.hpp" | |
| 82 #include "utilities/preserveException.hpp" | |
| 83 #ifdef TARGET_OS_FAMILY_linux | |
| 84 # include "thread_linux.inline.hpp" | |
| 85 #endif | |
| 86 #ifdef TARGET_OS_FAMILY_solaris | |
| 87 # include "thread_solaris.inline.hpp" | |
| 88 #endif | |
| 89 #ifdef TARGET_OS_FAMILY_windows | |
| 90 # include "thread_windows.inline.hpp" | |
| 91 #endif | |
| 92 #ifndef SERIALGC | |
| 93 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" | |
| 94 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" | |
| 95 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
| 96 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
| 97 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
| 98 #endif | |
| 0 | 99 |
| 100 // Known objects | |
| 101 klassOop Universe::_boolArrayKlassObj = NULL; | |
| 102 klassOop Universe::_byteArrayKlassObj = NULL; | |
| 103 klassOop Universe::_charArrayKlassObj = NULL; | |
| 104 klassOop Universe::_intArrayKlassObj = NULL; | |
| 105 klassOop Universe::_shortArrayKlassObj = NULL; | |
| 106 klassOop Universe::_longArrayKlassObj = NULL; | |
| 107 klassOop Universe::_singleArrayKlassObj = NULL; | |
| 108 klassOop Universe::_doubleArrayKlassObj = NULL; | |
| 109 klassOop Universe::_typeArrayKlassObjs[T_VOID+1] = { NULL /*, NULL...*/ }; | |
| 110 klassOop Universe::_objectArrayKlassObj = NULL; | |
| 111 klassOop Universe::_symbolKlassObj = NULL; | |
| 112 klassOop Universe::_methodKlassObj = NULL; | |
| 113 klassOop Universe::_constMethodKlassObj = NULL; | |
| 114 klassOop Universe::_methodDataKlassObj = NULL; | |
| 115 klassOop Universe::_klassKlassObj = NULL; | |
| 116 klassOop Universe::_arrayKlassKlassObj = NULL; | |
| 117 klassOop Universe::_objArrayKlassKlassObj = NULL; | |
| 118 klassOop Universe::_typeArrayKlassKlassObj = NULL; | |
| 119 klassOop Universe::_instanceKlassKlassObj = NULL; | |
| 120 klassOop Universe::_constantPoolKlassObj = NULL; | |
| 121 klassOop Universe::_constantPoolCacheKlassObj = NULL; | |
| 122 klassOop Universe::_compiledICHolderKlassObj = NULL; | |
| 123 klassOop Universe::_systemObjArrayKlassObj = NULL; | |
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124 oop Universe::_int_mirror = NULL; |
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125 oop Universe::_float_mirror = NULL; |
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126 oop Universe::_double_mirror = NULL; |
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127 oop Universe::_byte_mirror = NULL; |
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128 oop Universe::_bool_mirror = NULL; |
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129 oop Universe::_char_mirror = NULL; |
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130 oop Universe::_long_mirror = NULL; |
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131 oop Universe::_short_mirror = NULL; |
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132 oop Universe::_void_mirror = NULL; |
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133 oop Universe::_mirrors[T_VOID+1] = { NULL /*, NULL...*/ }; |
| 0 | 134 oop Universe::_main_thread_group = NULL; |
| 135 oop Universe::_system_thread_group = NULL; | |
| 136 typeArrayOop Universe::_the_empty_byte_array = NULL; | |
| 137 typeArrayOop Universe::_the_empty_short_array = NULL; | |
| 138 typeArrayOop Universe::_the_empty_int_array = NULL; | |
| 139 objArrayOop Universe::_the_empty_system_obj_array = NULL; | |
| 140 objArrayOop Universe::_the_empty_class_klass_array = NULL; | |
| 141 objArrayOop Universe::_the_array_interfaces_array = NULL; | |
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142 oop Universe::_the_null_string = NULL; |
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143 oop Universe::_the_min_jint_string = NULL; |
| 0 | 144 LatestMethodOopCache* Universe::_finalizer_register_cache = NULL; |
| 145 LatestMethodOopCache* Universe::_loader_addClass_cache = NULL; | |
| 146 ActiveMethodOopsCache* Universe::_reflect_invoke_cache = NULL; | |
| 147 oop Universe::_out_of_memory_error_java_heap = NULL; | |
| 148 oop Universe::_out_of_memory_error_perm_gen = NULL; | |
| 149 oop Universe::_out_of_memory_error_array_size = NULL; | |
| 150 oop Universe::_out_of_memory_error_gc_overhead_limit = NULL; | |
| 151 objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL; | |
| 152 volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0; | |
| 153 bool Universe::_verify_in_progress = false; | |
| 154 oop Universe::_null_ptr_exception_instance = NULL; | |
| 155 oop Universe::_arithmetic_exception_instance = NULL; | |
| 156 oop Universe::_virtual_machine_error_instance = NULL; | |
| 157 oop Universe::_vm_exception = NULL; | |
| 158 oop Universe::_emptySymbol = NULL; | |
| 159 | |
| 160 // These variables are guarded by FullGCALot_lock. | |
| 161 debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;) | |
| 162 debug_only(int Universe::_fullgc_alot_dummy_next = 0;) | |
| 163 | |
| 164 | |
| 165 // Heap | |
| 166 int Universe::_verify_count = 0; | |
| 167 | |
| 168 int Universe::_base_vtable_size = 0; | |
| 169 bool Universe::_bootstrapping = false; | |
| 170 bool Universe::_fully_initialized = false; | |
| 171 | |
| 172 size_t Universe::_heap_capacity_at_last_gc; | |
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173 size_t Universe::_heap_used_at_last_gc = 0; |
| 0 | 174 |
| 175 CollectedHeap* Universe::_collectedHeap = NULL; | |
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176 |
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177 NarrowOopStruct Universe::_narrow_oop = { NULL, 0, true }; |
| 0 | 178 |
| 179 | |
| 180 void Universe::basic_type_classes_do(void f(klassOop)) { | |
| 181 f(boolArrayKlassObj()); | |
| 182 f(byteArrayKlassObj()); | |
| 183 f(charArrayKlassObj()); | |
| 184 f(intArrayKlassObj()); | |
| 185 f(shortArrayKlassObj()); | |
| 186 f(longArrayKlassObj()); | |
| 187 f(singleArrayKlassObj()); | |
| 188 f(doubleArrayKlassObj()); | |
| 189 } | |
| 190 | |
| 191 | |
| 192 void Universe::system_classes_do(void f(klassOop)) { | |
| 193 f(symbolKlassObj()); | |
| 194 f(methodKlassObj()); | |
| 195 f(constMethodKlassObj()); | |
| 196 f(methodDataKlassObj()); | |
| 197 f(klassKlassObj()); | |
| 198 f(arrayKlassKlassObj()); | |
| 199 f(objArrayKlassKlassObj()); | |
| 200 f(typeArrayKlassKlassObj()); | |
| 201 f(instanceKlassKlassObj()); | |
| 202 f(constantPoolKlassObj()); | |
| 203 f(systemObjArrayKlassObj()); | |
| 204 } | |
| 205 | |
| 206 void Universe::oops_do(OopClosure* f, bool do_all) { | |
| 207 | |
| 208 f->do_oop((oop*) &_int_mirror); | |
| 209 f->do_oop((oop*) &_float_mirror); | |
| 210 f->do_oop((oop*) &_double_mirror); | |
| 211 f->do_oop((oop*) &_byte_mirror); | |
| 212 f->do_oop((oop*) &_bool_mirror); | |
| 213 f->do_oop((oop*) &_char_mirror); | |
| 214 f->do_oop((oop*) &_long_mirror); | |
| 215 f->do_oop((oop*) &_short_mirror); | |
| 216 f->do_oop((oop*) &_void_mirror); | |
| 217 | |
| 218 // It's important to iterate over these guys even if they are null, | |
| 219 // since that's how shared heaps are restored. | |
| 220 for (int i = T_BOOLEAN; i < T_VOID+1; i++) { | |
| 221 f->do_oop((oop*) &_mirrors[i]); | |
| 222 } | |
| 223 assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking"); | |
| 224 | |
| 225 // %%% Consider moving those "shared oops" over here with the others. | |
| 226 f->do_oop((oop*)&_boolArrayKlassObj); | |
| 227 f->do_oop((oop*)&_byteArrayKlassObj); | |
| 228 f->do_oop((oop*)&_charArrayKlassObj); | |
| 229 f->do_oop((oop*)&_intArrayKlassObj); | |
| 230 f->do_oop((oop*)&_shortArrayKlassObj); | |
| 231 f->do_oop((oop*)&_longArrayKlassObj); | |
| 232 f->do_oop((oop*)&_singleArrayKlassObj); | |
| 233 f->do_oop((oop*)&_doubleArrayKlassObj); | |
| 234 f->do_oop((oop*)&_objectArrayKlassObj); | |
| 235 { | |
| 236 for (int i = 0; i < T_VOID+1; i++) { | |
| 237 if (_typeArrayKlassObjs[i] != NULL) { | |
| 238 assert(i >= T_BOOLEAN, "checking"); | |
| 239 f->do_oop((oop*)&_typeArrayKlassObjs[i]); | |
| 240 } else if (do_all) { | |
| 241 f->do_oop((oop*)&_typeArrayKlassObjs[i]); | |
| 242 } | |
| 243 } | |
| 244 } | |
| 245 f->do_oop((oop*)&_symbolKlassObj); | |
| 246 f->do_oop((oop*)&_methodKlassObj); | |
| 247 f->do_oop((oop*)&_constMethodKlassObj); | |
| 248 f->do_oop((oop*)&_methodDataKlassObj); | |
| 249 f->do_oop((oop*)&_klassKlassObj); | |
| 250 f->do_oop((oop*)&_arrayKlassKlassObj); | |
| 251 f->do_oop((oop*)&_objArrayKlassKlassObj); | |
| 252 f->do_oop((oop*)&_typeArrayKlassKlassObj); | |
| 253 f->do_oop((oop*)&_instanceKlassKlassObj); | |
| 254 f->do_oop((oop*)&_constantPoolKlassObj); | |
| 255 f->do_oop((oop*)&_constantPoolCacheKlassObj); | |
| 256 f->do_oop((oop*)&_compiledICHolderKlassObj); | |
| 257 f->do_oop((oop*)&_systemObjArrayKlassObj); | |
| 258 f->do_oop((oop*)&_the_empty_byte_array); | |
| 259 f->do_oop((oop*)&_the_empty_short_array); | |
| 260 f->do_oop((oop*)&_the_empty_int_array); | |
| 261 f->do_oop((oop*)&_the_empty_system_obj_array); | |
| 262 f->do_oop((oop*)&_the_empty_class_klass_array); | |
| 263 f->do_oop((oop*)&_the_array_interfaces_array); | |
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264 f->do_oop((oop*)&_the_null_string); |
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265 f->do_oop((oop*)&_the_min_jint_string); |
| 0 | 266 _finalizer_register_cache->oops_do(f); |
| 267 _loader_addClass_cache->oops_do(f); | |
| 268 _reflect_invoke_cache->oops_do(f); | |
| 269 f->do_oop((oop*)&_out_of_memory_error_java_heap); | |
| 270 f->do_oop((oop*)&_out_of_memory_error_perm_gen); | |
| 271 f->do_oop((oop*)&_out_of_memory_error_array_size); | |
| 272 f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit); | |
| 273 if (_preallocated_out_of_memory_error_array != (oop)NULL) { // NULL when DumpSharedSpaces | |
| 274 f->do_oop((oop*)&_preallocated_out_of_memory_error_array); | |
| 275 } | |
| 276 f->do_oop((oop*)&_null_ptr_exception_instance); | |
| 277 f->do_oop((oop*)&_arithmetic_exception_instance); | |
| 278 f->do_oop((oop*)&_virtual_machine_error_instance); | |
| 279 f->do_oop((oop*)&_main_thread_group); | |
| 280 f->do_oop((oop*)&_system_thread_group); | |
| 281 f->do_oop((oop*)&_vm_exception); | |
| 282 f->do_oop((oop*)&_emptySymbol); | |
| 283 debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);) | |
| 284 } | |
| 285 | |
| 286 | |
| 287 void Universe::check_alignment(uintx size, uintx alignment, const char* name) { | |
| 288 if (size < alignment || size % alignment != 0) { | |
| 289 ResourceMark rm; | |
| 290 stringStream st; | |
| 291 st.print("Size of %s (%ld bytes) must be aligned to %ld bytes", name, size, alignment); | |
| 292 char* error = st.as_string(); | |
| 293 vm_exit_during_initialization(error); | |
| 294 } | |
| 295 } | |
| 296 | |
| 297 | |
| 298 void Universe::genesis(TRAPS) { | |
| 299 ResourceMark rm; | |
| 300 { FlagSetting fs(_bootstrapping, true); | |
| 301 | |
| 302 { MutexLocker mc(Compile_lock); | |
| 303 | |
| 304 // determine base vtable size; without that we cannot create the array klasses | |
| 305 compute_base_vtable_size(); | |
| 306 | |
| 307 if (!UseSharedSpaces) { | |
| 308 _klassKlassObj = klassKlass::create_klass(CHECK); | |
| 309 _arrayKlassKlassObj = arrayKlassKlass::create_klass(CHECK); | |
| 310 | |
| 311 _objArrayKlassKlassObj = objArrayKlassKlass::create_klass(CHECK); | |
| 312 _instanceKlassKlassObj = instanceKlassKlass::create_klass(CHECK); | |
| 313 _typeArrayKlassKlassObj = typeArrayKlassKlass::create_klass(CHECK); | |
| 314 | |
| 315 _symbolKlassObj = symbolKlass::create_klass(CHECK); | |
| 316 | |
| 317 _emptySymbol = oopFactory::new_symbol("", CHECK); | |
| 318 | |
| 319 _boolArrayKlassObj = typeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK); | |
| 320 _charArrayKlassObj = typeArrayKlass::create_klass(T_CHAR, sizeof(jchar), CHECK); | |
| 321 _singleArrayKlassObj = typeArrayKlass::create_klass(T_FLOAT, sizeof(jfloat), CHECK); | |
| 322 _doubleArrayKlassObj = typeArrayKlass::create_klass(T_DOUBLE, sizeof(jdouble), CHECK); | |
| 323 _byteArrayKlassObj = typeArrayKlass::create_klass(T_BYTE, sizeof(jbyte), CHECK); | |
| 324 _shortArrayKlassObj = typeArrayKlass::create_klass(T_SHORT, sizeof(jshort), CHECK); | |
| 325 _intArrayKlassObj = typeArrayKlass::create_klass(T_INT, sizeof(jint), CHECK); | |
| 326 _longArrayKlassObj = typeArrayKlass::create_klass(T_LONG, sizeof(jlong), CHECK); | |
| 327 | |
| 328 _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj; | |
| 329 _typeArrayKlassObjs[T_CHAR] = _charArrayKlassObj; | |
| 330 _typeArrayKlassObjs[T_FLOAT] = _singleArrayKlassObj; | |
| 331 _typeArrayKlassObjs[T_DOUBLE] = _doubleArrayKlassObj; | |
| 332 _typeArrayKlassObjs[T_BYTE] = _byteArrayKlassObj; | |
| 333 _typeArrayKlassObjs[T_SHORT] = _shortArrayKlassObj; | |
| 334 _typeArrayKlassObjs[T_INT] = _intArrayKlassObj; | |
| 335 _typeArrayKlassObjs[T_LONG] = _longArrayKlassObj; | |
| 336 | |
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337 _methodKlassObj = methodKlass::create_klass(CHECK); |
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338 _constMethodKlassObj = constMethodKlass::create_klass(CHECK); |
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339 _methodDataKlassObj = methodDataKlass::create_klass(CHECK); |
| 0 | 340 _constantPoolKlassObj = constantPoolKlass::create_klass(CHECK); |
| 341 _constantPoolCacheKlassObj = constantPoolCacheKlass::create_klass(CHECK); | |
| 342 | |
| 343 _compiledICHolderKlassObj = compiledICHolderKlass::create_klass(CHECK); | |
| 344 _systemObjArrayKlassObj = objArrayKlassKlass::cast(objArrayKlassKlassObj())->allocate_system_objArray_klass(CHECK); | |
| 345 | |
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346 _the_empty_byte_array = oopFactory::new_permanent_byteArray(0, CHECK); |
| 0 | 347 _the_empty_short_array = oopFactory::new_permanent_shortArray(0, CHECK); |
| 348 _the_empty_int_array = oopFactory::new_permanent_intArray(0, CHECK); | |
| 349 _the_empty_system_obj_array = oopFactory::new_system_objArray(0, CHECK); | |
| 350 | |
| 351 _the_array_interfaces_array = oopFactory::new_system_objArray(2, CHECK); | |
| 352 _vm_exception = oopFactory::new_symbol("vm exception holder", CHECK); | |
| 353 } else { | |
| 354 FileMapInfo *mapinfo = FileMapInfo::current_info(); | |
| 355 char* buffer = mapinfo->region_base(CompactingPermGenGen::md); | |
| 356 void** vtbl_list = (void**)buffer; | |
| 357 init_self_patching_vtbl_list(vtbl_list, | |
| 358 CompactingPermGenGen::vtbl_list_size); | |
| 359 } | |
| 360 } | |
| 361 | |
| 362 vmSymbols::initialize(CHECK); | |
| 363 | |
| 364 SystemDictionary::initialize(CHECK); | |
| 365 | |
| 1142 | 366 klassOop ok = SystemDictionary::Object_klass(); |
| 0 | 367 |
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368 _the_null_string = StringTable::intern("null", CHECK); |
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369 _the_min_jint_string = StringTable::intern("-2147483648", CHECK); |
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370 |
| 0 | 371 if (UseSharedSpaces) { |
| 372 // Verify shared interfaces array. | |
| 373 assert(_the_array_interfaces_array->obj_at(0) == | |
| 1142 | 374 SystemDictionary::Cloneable_klass(), "u3"); |
| 0 | 375 assert(_the_array_interfaces_array->obj_at(1) == |
| 1142 | 376 SystemDictionary::Serializable_klass(), "u3"); |
| 0 | 377 |
| 378 // Verify element klass for system obj array klass | |
| 379 assert(objArrayKlass::cast(_systemObjArrayKlassObj)->element_klass() == ok, "u1"); | |
| 380 assert(objArrayKlass::cast(_systemObjArrayKlassObj)->bottom_klass() == ok, "u2"); | |
| 381 | |
| 382 // Verify super class for the classes created above | |
| 383 assert(Klass::cast(boolArrayKlassObj() )->super() == ok, "u3"); | |
| 384 assert(Klass::cast(charArrayKlassObj() )->super() == ok, "u3"); | |
| 385 assert(Klass::cast(singleArrayKlassObj() )->super() == ok, "u3"); | |
| 386 assert(Klass::cast(doubleArrayKlassObj() )->super() == ok, "u3"); | |
| 387 assert(Klass::cast(byteArrayKlassObj() )->super() == ok, "u3"); | |
| 388 assert(Klass::cast(shortArrayKlassObj() )->super() == ok, "u3"); | |
| 389 assert(Klass::cast(intArrayKlassObj() )->super() == ok, "u3"); | |
| 390 assert(Klass::cast(longArrayKlassObj() )->super() == ok, "u3"); | |
| 391 assert(Klass::cast(constantPoolKlassObj() )->super() == ok, "u3"); | |
| 392 assert(Klass::cast(systemObjArrayKlassObj())->super() == ok, "u3"); | |
| 393 } else { | |
| 394 // Set up shared interfaces array. (Do this before supers are set up.) | |
| 1142 | 395 _the_array_interfaces_array->obj_at_put(0, SystemDictionary::Cloneable_klass()); |
| 396 _the_array_interfaces_array->obj_at_put(1, SystemDictionary::Serializable_klass()); | |
| 0 | 397 |
| 398 // Set element klass for system obj array klass | |
| 399 objArrayKlass::cast(_systemObjArrayKlassObj)->set_element_klass(ok); | |
| 400 objArrayKlass::cast(_systemObjArrayKlassObj)->set_bottom_klass(ok); | |
| 401 | |
| 402 // Set super class for the classes created above | |
| 403 Klass::cast(boolArrayKlassObj() )->initialize_supers(ok, CHECK); | |
| 404 Klass::cast(charArrayKlassObj() )->initialize_supers(ok, CHECK); | |
| 405 Klass::cast(singleArrayKlassObj() )->initialize_supers(ok, CHECK); | |
| 406 Klass::cast(doubleArrayKlassObj() )->initialize_supers(ok, CHECK); | |
| 407 Klass::cast(byteArrayKlassObj() )->initialize_supers(ok, CHECK); | |
| 408 Klass::cast(shortArrayKlassObj() )->initialize_supers(ok, CHECK); | |
| 409 Klass::cast(intArrayKlassObj() )->initialize_supers(ok, CHECK); | |
| 410 Klass::cast(longArrayKlassObj() )->initialize_supers(ok, CHECK); | |
| 411 Klass::cast(constantPoolKlassObj() )->initialize_supers(ok, CHECK); | |
| 412 Klass::cast(systemObjArrayKlassObj())->initialize_supers(ok, CHECK); | |
| 413 Klass::cast(boolArrayKlassObj() )->set_super(ok); | |
| 414 Klass::cast(charArrayKlassObj() )->set_super(ok); | |
| 415 Klass::cast(singleArrayKlassObj() )->set_super(ok); | |
| 416 Klass::cast(doubleArrayKlassObj() )->set_super(ok); | |
| 417 Klass::cast(byteArrayKlassObj() )->set_super(ok); | |
| 418 Klass::cast(shortArrayKlassObj() )->set_super(ok); | |
| 419 Klass::cast(intArrayKlassObj() )->set_super(ok); | |
| 420 Klass::cast(longArrayKlassObj() )->set_super(ok); | |
| 421 Klass::cast(constantPoolKlassObj() )->set_super(ok); | |
| 422 Klass::cast(systemObjArrayKlassObj())->set_super(ok); | |
| 423 } | |
| 424 | |
| 425 Klass::cast(boolArrayKlassObj() )->append_to_sibling_list(); | |
| 426 Klass::cast(charArrayKlassObj() )->append_to_sibling_list(); | |
| 427 Klass::cast(singleArrayKlassObj() )->append_to_sibling_list(); | |
| 428 Klass::cast(doubleArrayKlassObj() )->append_to_sibling_list(); | |
| 429 Klass::cast(byteArrayKlassObj() )->append_to_sibling_list(); | |
| 430 Klass::cast(shortArrayKlassObj() )->append_to_sibling_list(); | |
| 431 Klass::cast(intArrayKlassObj() )->append_to_sibling_list(); | |
| 432 Klass::cast(longArrayKlassObj() )->append_to_sibling_list(); | |
| 433 Klass::cast(constantPoolKlassObj() )->append_to_sibling_list(); | |
| 434 Klass::cast(systemObjArrayKlassObj())->append_to_sibling_list(); | |
| 435 } // end of core bootstrapping | |
| 436 | |
| 437 // Initialize _objectArrayKlass after core bootstraping to make | |
| 438 // sure the super class is set up properly for _objectArrayKlass. | |
| 439 _objectArrayKlassObj = instanceKlass:: | |
| 1142 | 440 cast(SystemDictionary::Object_klass())->array_klass(1, CHECK); |
| 0 | 441 // Add the class to the class hierarchy manually to make sure that |
| 442 // its vtable is initialized after core bootstrapping is completed. | |
| 443 Klass::cast(_objectArrayKlassObj)->append_to_sibling_list(); | |
| 444 | |
| 445 // Compute is_jdk version flags. | |
| 446 // Only 1.3 or later has the java.lang.Shutdown class. | |
| 447 // Only 1.4 or later has the java.lang.CharSequence interface. | |
| 448 // Only 1.5 or later has the java.lang.management.MemoryUsage class. | |
| 242 | 449 if (JDK_Version::is_partially_initialized()) { |
| 450 uint8_t jdk_version; | |
| 451 klassOop k = SystemDictionary::resolve_or_null( | |
| 452 vmSymbolHandles::java_lang_management_MemoryUsage(), THREAD); | |
| 0 | 453 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
| 454 if (k == NULL) { | |
| 242 | 455 k = SystemDictionary::resolve_or_null( |
| 456 vmSymbolHandles::java_lang_CharSequence(), THREAD); | |
| 0 | 457 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
| 458 if (k == NULL) { | |
| 242 | 459 k = SystemDictionary::resolve_or_null( |
| 460 vmSymbolHandles::java_lang_Shutdown(), THREAD); | |
| 0 | 461 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
| 462 if (k == NULL) { | |
| 242 | 463 jdk_version = 2; |
| 0 | 464 } else { |
| 242 | 465 jdk_version = 3; |
| 0 | 466 } |
| 467 } else { | |
| 242 | 468 jdk_version = 4; |
| 0 | 469 } |
| 470 } else { | |
| 242 | 471 jdk_version = 5; |
| 0 | 472 } |
| 242 | 473 JDK_Version::fully_initialize(jdk_version); |
| 0 | 474 } |
| 475 | |
| 476 #ifdef ASSERT | |
| 477 if (FullGCALot) { | |
| 478 // Allocate an array of dummy objects. | |
| 479 // We'd like these to be at the bottom of the old generation, | |
| 480 // so that when we free one and then collect, | |
| 481 // (almost) the whole heap moves | |
| 482 // and we find out if we actually update all the oops correctly. | |
| 483 // But we can't allocate directly in the old generation, | |
| 484 // so we allocate wherever, and hope that the first collection | |
| 485 // moves these objects to the bottom of the old generation. | |
| 486 // We can allocate directly in the permanent generation, so we do. | |
| 487 int size; | |
| 488 if (UseConcMarkSweepGC) { | |
| 489 warning("Using +FullGCALot with concurrent mark sweep gc " | |
| 490 "will not force all objects to relocate"); | |
| 491 size = FullGCALotDummies; | |
| 492 } else { | |
| 493 size = FullGCALotDummies * 2; | |
| 494 } | |
| 495 objArrayOop naked_array = oopFactory::new_system_objArray(size, CHECK); | |
| 496 objArrayHandle dummy_array(THREAD, naked_array); | |
| 497 int i = 0; | |
| 498 while (i < size) { | |
| 499 if (!UseConcMarkSweepGC) { | |
| 500 // Allocate dummy in old generation | |
| 1142 | 501 oop dummy = instanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK); |
| 0 | 502 dummy_array->obj_at_put(i++, dummy); |
| 503 } | |
| 504 // Allocate dummy in permanent generation | |
| 1142 | 505 oop dummy = instanceKlass::cast(SystemDictionary::Object_klass())->allocate_permanent_instance(CHECK); |
| 0 | 506 dummy_array->obj_at_put(i++, dummy); |
| 507 } | |
| 508 { | |
| 509 // Only modify the global variable inside the mutex. | |
| 510 // If we had a race to here, the other dummy_array instances | |
| 511 // and their elements just get dropped on the floor, which is fine. | |
| 512 MutexLocker ml(FullGCALot_lock); | |
| 513 if (_fullgc_alot_dummy_array == NULL) { | |
| 514 _fullgc_alot_dummy_array = dummy_array(); | |
| 515 } | |
| 516 } | |
| 517 assert(i == _fullgc_alot_dummy_array->length(), "just checking"); | |
| 518 } | |
| 519 #endif | |
| 520 } | |
| 521 | |
| 522 | |
| 523 static inline void add_vtable(void** list, int* n, Klass* o, int count) { | |
| 524 list[(*n)++] = *(void**)&o->vtbl_value(); | |
| 525 guarantee((*n) <= count, "vtable list too small."); | |
| 526 } | |
| 527 | |
| 528 | |
| 529 void Universe::init_self_patching_vtbl_list(void** list, int count) { | |
| 530 int n = 0; | |
| 531 { klassKlass o; add_vtable(list, &n, &o, count); } | |
| 532 { arrayKlassKlass o; add_vtable(list, &n, &o, count); } | |
| 533 { objArrayKlassKlass o; add_vtable(list, &n, &o, count); } | |
| 534 { instanceKlassKlass o; add_vtable(list, &n, &o, count); } | |
| 535 { instanceKlass o; add_vtable(list, &n, &o, count); } | |
| 536 { instanceRefKlass o; add_vtable(list, &n, &o, count); } | |
| 537 { typeArrayKlassKlass o; add_vtable(list, &n, &o, count); } | |
| 538 { symbolKlass o; add_vtable(list, &n, &o, count); } | |
| 539 { typeArrayKlass o; add_vtable(list, &n, &o, count); } | |
| 540 { methodKlass o; add_vtable(list, &n, &o, count); } | |
| 541 { constMethodKlass o; add_vtable(list, &n, &o, count); } | |
| 542 { constantPoolKlass o; add_vtable(list, &n, &o, count); } | |
| 543 { constantPoolCacheKlass o; add_vtable(list, &n, &o, count); } | |
| 544 { objArrayKlass o; add_vtable(list, &n, &o, count); } | |
| 545 { methodDataKlass o; add_vtable(list, &n, &o, count); } | |
| 546 { compiledICHolderKlass o; add_vtable(list, &n, &o, count); } | |
| 547 } | |
| 548 | |
| 549 | |
| 550 class FixupMirrorClosure: public ObjectClosure { | |
| 551 public: | |
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552 virtual void do_object(oop obj) { |
| 0 | 553 if (obj->is_klass()) { |
| 554 EXCEPTION_MARK; | |
| 555 KlassHandle k(THREAD, klassOop(obj)); | |
| 556 // We will never reach the CATCH below since Exceptions::_throw will cause | |
| 557 // the VM to exit if an exception is thrown during initialization | |
| 558 java_lang_Class::create_mirror(k, CATCH); | |
| 559 // This call unconditionally creates a new mirror for k, | |
| 560 // and links in k's component_mirror field if k is an array. | |
| 561 // If k is an objArray, k's element type must already have | |
| 562 // a mirror. In other words, this closure must process | |
| 563 // the component type of an objArray k before it processes k. | |
| 564 // This works because the permgen iterator presents arrays | |
| 565 // and their component types in order of creation. | |
| 566 } | |
| 567 } | |
| 568 }; | |
| 569 | |
| 570 void Universe::initialize_basic_type_mirrors(TRAPS) { | |
| 571 if (UseSharedSpaces) { | |
| 572 assert(_int_mirror != NULL, "already loaded"); | |
| 573 assert(_void_mirror == _mirrors[T_VOID], "consistently loaded"); | |
| 574 } else { | |
| 575 | |
| 576 assert(_int_mirror==NULL, "basic type mirrors already initialized"); | |
| 577 _int_mirror = | |
| 578 java_lang_Class::create_basic_type_mirror("int", T_INT, CHECK); | |
| 579 _float_mirror = | |
| 580 java_lang_Class::create_basic_type_mirror("float", T_FLOAT, CHECK); | |
| 581 _double_mirror = | |
| 582 java_lang_Class::create_basic_type_mirror("double", T_DOUBLE, CHECK); | |
| 583 _byte_mirror = | |
| 584 java_lang_Class::create_basic_type_mirror("byte", T_BYTE, CHECK); | |
| 585 _bool_mirror = | |
| 586 java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK); | |
| 587 _char_mirror = | |
| 588 java_lang_Class::create_basic_type_mirror("char", T_CHAR, CHECK); | |
| 589 _long_mirror = | |
| 590 java_lang_Class::create_basic_type_mirror("long", T_LONG, CHECK); | |
| 591 _short_mirror = | |
| 592 java_lang_Class::create_basic_type_mirror("short", T_SHORT, CHECK); | |
| 593 _void_mirror = | |
| 594 java_lang_Class::create_basic_type_mirror("void", T_VOID, CHECK); | |
| 595 | |
| 596 _mirrors[T_INT] = _int_mirror; | |
| 597 _mirrors[T_FLOAT] = _float_mirror; | |
| 598 _mirrors[T_DOUBLE] = _double_mirror; | |
| 599 _mirrors[T_BYTE] = _byte_mirror; | |
| 600 _mirrors[T_BOOLEAN] = _bool_mirror; | |
| 601 _mirrors[T_CHAR] = _char_mirror; | |
| 602 _mirrors[T_LONG] = _long_mirror; | |
| 603 _mirrors[T_SHORT] = _short_mirror; | |
| 604 _mirrors[T_VOID] = _void_mirror; | |
| 605 //_mirrors[T_OBJECT] = instanceKlass::cast(_object_klass)->java_mirror(); | |
| 606 //_mirrors[T_ARRAY] = instanceKlass::cast(_object_klass)->java_mirror(); | |
| 607 } | |
| 608 } | |
| 609 | |
| 610 void Universe::fixup_mirrors(TRAPS) { | |
| 611 // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly, | |
| 612 // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply | |
| 613 // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note | |
| 614 // that the number of objects allocated at this point is very small. | |
| 1142 | 615 assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded"); |
| 0 | 616 FixupMirrorClosure blk; |
| 617 Universe::heap()->permanent_object_iterate(&blk); | |
| 618 } | |
| 619 | |
| 620 | |
| 621 static bool has_run_finalizers_on_exit = false; | |
| 622 | |
| 623 void Universe::run_finalizers_on_exit() { | |
| 624 if (has_run_finalizers_on_exit) return; | |
| 625 has_run_finalizers_on_exit = true; | |
| 626 | |
| 627 // Called on VM exit. This ought to be run in a separate thread. | |
| 628 if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit"); | |
| 629 { | |
| 630 PRESERVE_EXCEPTION_MARK; | |
| 1142 | 631 KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass()); |
| 0 | 632 JavaValue result(T_VOID); |
| 633 JavaCalls::call_static( | |
| 634 &result, | |
| 635 finalizer_klass, | |
| 636 vmSymbolHandles::run_finalizers_on_exit_name(), | |
| 637 vmSymbolHandles::void_method_signature(), | |
| 638 THREAD | |
| 639 ); | |
| 640 // Ignore any pending exceptions | |
| 641 CLEAR_PENDING_EXCEPTION; | |
| 642 } | |
| 643 } | |
| 644 | |
| 645 | |
| 646 // initialize_vtable could cause gc if | |
| 647 // 1) we specified true to initialize_vtable and | |
| 648 // 2) this ran after gc was enabled | |
| 649 // In case those ever change we use handles for oops | |
| 650 void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) { | |
| 651 // init vtable of k and all subclasses | |
| 652 Klass* ko = k_h()->klass_part(); | |
| 653 klassVtable* vt = ko->vtable(); | |
| 654 if (vt) vt->initialize_vtable(false, CHECK); | |
| 655 if (ko->oop_is_instance()) { | |
| 656 instanceKlass* ik = (instanceKlass*)ko; | |
| 657 for (KlassHandle s_h(THREAD, ik->subklass()); s_h() != NULL; s_h = (THREAD, s_h()->klass_part()->next_sibling())) { | |
| 658 reinitialize_vtable_of(s_h, CHECK); | |
| 659 } | |
| 660 } | |
| 661 } | |
| 662 | |
| 663 | |
| 664 void initialize_itable_for_klass(klassOop k, TRAPS) { | |
| 665 instanceKlass::cast(k)->itable()->initialize_itable(false, CHECK); | |
| 666 } | |
| 667 | |
| 668 | |
| 669 void Universe::reinitialize_itables(TRAPS) { | |
| 670 SystemDictionary::classes_do(initialize_itable_for_klass, CHECK); | |
| 671 | |
| 672 } | |
| 673 | |
| 674 | |
| 675 bool Universe::on_page_boundary(void* addr) { | |
| 676 return ((uintptr_t) addr) % os::vm_page_size() == 0; | |
| 677 } | |
| 678 | |
| 679 | |
| 680 bool Universe::should_fill_in_stack_trace(Handle throwable) { | |
| 681 // never attempt to fill in the stack trace of preallocated errors that do not have | |
| 682 // backtrace. These errors are kept alive forever and may be "re-used" when all | |
| 683 // preallocated errors with backtrace have been consumed. Also need to avoid | |
| 684 // a potential loop which could happen if an out of memory occurs when attempting | |
| 685 // to allocate the backtrace. | |
| 686 return ((throwable() != Universe::_out_of_memory_error_java_heap) && | |
| 687 (throwable() != Universe::_out_of_memory_error_perm_gen) && | |
| 688 (throwable() != Universe::_out_of_memory_error_array_size) && | |
| 689 (throwable() != Universe::_out_of_memory_error_gc_overhead_limit)); | |
| 690 } | |
| 691 | |
| 692 | |
| 693 oop Universe::gen_out_of_memory_error(oop default_err) { | |
| 694 // generate an out of memory error: | |
| 695 // - if there is a preallocated error with backtrace available then return it wth | |
| 696 // a filled in stack trace. | |
| 697 // - if there are no preallocated errors with backtrace available then return | |
| 698 // an error without backtrace. | |
| 699 int next; | |
| 700 if (_preallocated_out_of_memory_error_avail_count > 0) { | |
| 701 next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count); | |
| 702 assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt"); | |
| 703 } else { | |
| 704 next = -1; | |
| 705 } | |
| 706 if (next < 0) { | |
| 707 // all preallocated errors have been used. | |
| 708 // return default | |
| 709 return default_err; | |
| 710 } else { | |
| 711 // get the error object at the slot and set set it to NULL so that the | |
| 712 // array isn't keeping it alive anymore. | |
| 713 oop exc = preallocated_out_of_memory_errors()->obj_at(next); | |
| 714 assert(exc != NULL, "slot has been used already"); | |
| 715 preallocated_out_of_memory_errors()->obj_at_put(next, NULL); | |
| 716 | |
| 717 // use the message from the default error | |
| 718 oop msg = java_lang_Throwable::message(default_err); | |
| 719 assert(msg != NULL, "no message"); | |
| 720 java_lang_Throwable::set_message(exc, msg); | |
| 721 | |
| 722 // populate the stack trace and return it. | |
| 723 java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc); | |
| 724 return exc; | |
| 725 } | |
| 726 } | |
| 727 | |
| 728 static intptr_t non_oop_bits = 0; | |
| 729 | |
| 730 void* Universe::non_oop_word() { | |
| 731 // Neither the high bits nor the low bits of this value is allowed | |
| 732 // to look like (respectively) the high or low bits of a real oop. | |
| 733 // | |
| 734 // High and low are CPU-specific notions, but low always includes | |
| 735 // the low-order bit. Since oops are always aligned at least mod 4, | |
| 736 // setting the low-order bit will ensure that the low half of the | |
| 737 // word will never look like that of a real oop. | |
| 738 // | |
| 739 // Using the OS-supplied non-memory-address word (usually 0 or -1) | |
| 740 // will take care of the high bits, however many there are. | |
| 741 | |
| 742 if (non_oop_bits == 0) { | |
| 743 non_oop_bits = (intptr_t)os::non_memory_address_word() | 1; | |
| 744 } | |
| 745 | |
| 746 return (void*)non_oop_bits; | |
| 747 } | |
| 748 | |
| 749 jint universe_init() { | |
| 750 assert(!Universe::_fully_initialized, "called after initialize_vtables"); | |
| 751 guarantee(1 << LogHeapWordSize == sizeof(HeapWord), | |
| 752 "LogHeapWordSize is incorrect."); | |
| 753 guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?"); | |
| 754 guarantee(sizeof(oop) % sizeof(HeapWord) == 0, | |
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755 "oop size is not not a multiple of HeapWord size"); |
| 0 | 756 TraceTime timer("Genesis", TraceStartupTime); |
| 757 GC_locker::lock(); // do not allow gc during bootstrapping | |
| 758 JavaClasses::compute_hard_coded_offsets(); | |
| 759 | |
| 760 // Get map info from shared archive file. | |
| 761 if (DumpSharedSpaces) | |
| 762 UseSharedSpaces = false; | |
| 763 | |
| 764 FileMapInfo* mapinfo = NULL; | |
| 765 if (UseSharedSpaces) { | |
| 766 mapinfo = NEW_C_HEAP_OBJ(FileMapInfo); | |
| 767 memset(mapinfo, 0, sizeof(FileMapInfo)); | |
| 768 | |
| 769 // Open the shared archive file, read and validate the header. If | |
| 770 // initialization files, shared spaces [UseSharedSpaces] are | |
| 771 // disabled and the file is closed. | |
| 772 | |
| 773 if (mapinfo->initialize()) { | |
| 774 FileMapInfo::set_current_info(mapinfo); | |
| 775 } else { | |
| 776 assert(!mapinfo->is_open() && !UseSharedSpaces, | |
| 777 "archive file not closed or shared spaces not disabled."); | |
| 778 } | |
| 779 } | |
| 780 | |
| 781 jint status = Universe::initialize_heap(); | |
| 782 if (status != JNI_OK) { | |
| 783 return status; | |
| 784 } | |
| 785 | |
| 786 // We have a heap so create the methodOop caches before | |
| 787 // CompactingPermGenGen::initialize_oops() tries to populate them. | |
| 788 Universe::_finalizer_register_cache = new LatestMethodOopCache(); | |
| 789 Universe::_loader_addClass_cache = new LatestMethodOopCache(); | |
| 790 Universe::_reflect_invoke_cache = new ActiveMethodOopsCache(); | |
| 791 | |
| 792 if (UseSharedSpaces) { | |
| 793 | |
| 794 // Read the data structures supporting the shared spaces (shared | |
| 795 // system dictionary, symbol table, etc.). After that, access to | |
| 796 // the file (other than the mapped regions) is no longer needed, and | |
| 797 // the file is closed. Closing the file does not affect the | |
| 798 // currently mapped regions. | |
| 799 | |
| 800 CompactingPermGenGen::initialize_oops(); | |
| 801 mapinfo->close(); | |
| 802 | |
| 803 } else { | |
| 804 SymbolTable::create_table(); | |
| 805 StringTable::create_table(); | |
| 806 ClassLoader::create_package_info_table(); | |
| 807 } | |
| 808 | |
| 809 return JNI_OK; | |
| 810 } | |
| 811 | |
|
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812 // Choose the heap base address and oop encoding mode |
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813 // when compressed oops are used: |
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814 // Unscaled - Use 32-bits oops without encoding when |
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815 // NarrowOopHeapBaseMin + heap_size < 4Gb |
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816 // ZeroBased - Use zero based compressed oops with encoding when |
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817 // NarrowOopHeapBaseMin + heap_size < 32Gb |
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818 // HeapBased - Use compressed oops with heap base + encoding. |
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819 |
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820 // 4Gb |
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821 static const uint64_t NarrowOopHeapMax = (uint64_t(max_juint) + 1); |
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822 // 32Gb |
|
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823 // OopEncodingHeapMax == NarrowOopHeapMax << LogMinObjAlignmentInBytes; |
|
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824 |
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825 char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) { |
|
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826 size_t base = 0; |
|
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827 #ifdef _LP64 |
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828 if (UseCompressedOops) { |
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829 assert(mode == UnscaledNarrowOop || |
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830 mode == ZeroBasedNarrowOop || |
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831 mode == HeapBasedNarrowOop, "mode is invalid"); |
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832 const size_t total_size = heap_size + HeapBaseMinAddress; |
|
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833 // Return specified base for the first request. |
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834 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) { |
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835 base = HeapBaseMinAddress; |
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836 } else if (total_size <= OopEncodingHeapMax && (mode != HeapBasedNarrowOop)) { |
|
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837 if (total_size <= NarrowOopHeapMax && (mode == UnscaledNarrowOop) && |
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838 (Universe::narrow_oop_shift() == 0)) { |
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839 // Use 32-bits oops without encoding and |
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840 // place heap's top on the 4Gb boundary |
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841 base = (NarrowOopHeapMax - heap_size); |
|
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842 } else { |
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843 // Can't reserve with NarrowOopShift == 0 |
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844 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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845 if (mode == UnscaledNarrowOop || |
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846 mode == ZeroBasedNarrowOop && total_size <= NarrowOopHeapMax) { |
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847 // Use zero based compressed oops with encoding and |
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848 // place heap's top on the 32Gb boundary in case |
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849 // total_size > 4Gb or failed to reserve below 4Gb. |
|
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850 base = (OopEncodingHeapMax - heap_size); |
|
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851 } |
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852 } |
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853 } else { |
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854 // Can't reserve below 32Gb. |
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855 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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856 } |
|
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857 // Set narrow_oop_base and narrow_oop_use_implicit_null_checks |
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858 // used in ReservedHeapSpace() constructors. |
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859 // The final values will be set in initialize_heap() below. |
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860 if (base != 0 && (base + heap_size) <= OopEncodingHeapMax) { |
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861 // Use zero based compressed oops |
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862 Universe::set_narrow_oop_base(NULL); |
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863 // Don't need guard page for implicit checks in indexed |
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864 // addressing mode with zero based Compressed Oops. |
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865 Universe::set_narrow_oop_use_implicit_null_checks(true); |
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866 } else { |
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867 // Set to a non-NULL value so the ReservedSpace ctor computes |
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868 // the correct no-access prefix. |
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869 // The final value will be set in initialize_heap() below. |
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870 Universe::set_narrow_oop_base((address)NarrowOopHeapMax); |
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871 #ifdef _WIN64 |
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872 if (UseLargePages) { |
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873 // Cannot allocate guard pages for implicit checks in indexed |
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874 // addressing mode when large pages are specified on windows. |
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875 Universe::set_narrow_oop_use_implicit_null_checks(false); |
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876 } |
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877 #endif // _WIN64 |
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878 } |
|
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879 } |
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880 #endif |
|
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881 return (char*)base; // also return NULL (don't care) for 32-bit VM |
|
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882 } |
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883 |
| 0 | 884 jint Universe::initialize_heap() { |
| 885 | |
| 886 if (UseParallelGC) { | |
| 887 #ifndef SERIALGC | |
| 888 Universe::_collectedHeap = new ParallelScavengeHeap(); | |
| 889 #else // SERIALGC | |
| 890 fatal("UseParallelGC not supported in java kernel vm."); | |
| 891 #endif // SERIALGC | |
| 892 | |
|
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893 } else if (UseG1GC) { |
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894 #ifndef SERIALGC |
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895 G1CollectorPolicy* g1p = new G1CollectorPolicy_BestRegionsFirst(); |
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896 G1CollectedHeap* g1h = new G1CollectedHeap(g1p); |
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897 Universe::_collectedHeap = g1h; |
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898 #else // SERIALGC |
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899 fatal("UseG1GC not supported in java kernel vm."); |
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900 #endif // SERIALGC |
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901 |
| 0 | 902 } else { |
| 903 GenCollectorPolicy *gc_policy; | |
| 904 | |
| 905 if (UseSerialGC) { | |
| 906 gc_policy = new MarkSweepPolicy(); | |
| 907 } else if (UseConcMarkSweepGC) { | |
| 908 #ifndef SERIALGC | |
| 909 if (UseAdaptiveSizePolicy) { | |
| 910 gc_policy = new ASConcurrentMarkSweepPolicy(); | |
| 911 } else { | |
| 912 gc_policy = new ConcurrentMarkSweepPolicy(); | |
| 913 } | |
| 914 #else // SERIALGC | |
| 915 fatal("UseConcMarkSweepGC not supported in java kernel vm."); | |
| 916 #endif // SERIALGC | |
| 917 } else { // default old generation | |
| 918 gc_policy = new MarkSweepPolicy(); | |
| 919 } | |
| 920 | |
| 921 Universe::_collectedHeap = new GenCollectedHeap(gc_policy); | |
| 922 } | |
| 923 | |
| 924 jint status = Universe::heap()->initialize(); | |
| 925 if (status != JNI_OK) { | |
| 926 return status; | |
| 927 } | |
|
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928 |
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929 #ifdef _LP64 |
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930 if (UseCompressedOops) { |
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931 // Subtract a page because something can get allocated at heap base. |
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932 // This also makes implicit null checking work, because the |
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933 // memory+1 page below heap_base needs to cause a signal. |
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934 // See needs_explicit_null_check. |
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935 // Only set the heap base for compressed oops because it indicates |
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936 // compressed oops for pstack code. |
| 2080 | 937 bool verbose = PrintCompressedOopsMode || (PrintMiscellaneous && Verbose); |
| 938 if (verbose) { | |
|
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939 tty->cr(); |
| 1963 | 940 tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB", |
| 941 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M); | |
|
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942 } |
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943 if ((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax) { |
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944 // Can't reserve heap below 32Gb. |
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945 Universe::set_narrow_oop_base(Universe::heap()->base() - os::vm_page_size()); |
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946 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
| 2080 | 947 if (verbose) { |
|
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948 tty->print(", Compressed Oops with base: "PTR_FORMAT, Universe::narrow_oop_base()); |
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949 } |
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950 } else { |
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951 Universe::set_narrow_oop_base(0); |
| 2080 | 952 if (verbose) { |
|
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953 tty->print(", zero based Compressed Oops"); |
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954 } |
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955 #ifdef _WIN64 |
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956 if (!Universe::narrow_oop_use_implicit_null_checks()) { |
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957 // Don't need guard page for implicit checks in indexed addressing |
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958 // mode with zero based Compressed Oops. |
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959 Universe::set_narrow_oop_use_implicit_null_checks(true); |
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960 } |
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961 #endif // _WIN64 |
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962 if((uint64_t)Universe::heap()->reserved_region().end() > NarrowOopHeapMax) { |
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963 // Can't reserve heap below 4Gb. |
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964 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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965 } else { |
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966 Universe::set_narrow_oop_shift(0); |
| 2080 | 967 if (verbose) { |
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968 tty->print(", 32-bits Oops"); |
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969 } |
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970 } |
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971 } |
| 2080 | 972 if (verbose) { |
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973 tty->cr(); |
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974 tty->cr(); |
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975 } |
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976 } |
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977 assert(Universe::narrow_oop_base() == (Universe::heap()->base() - os::vm_page_size()) || |
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978 Universe::narrow_oop_base() == NULL, "invalid value"); |
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979 assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes || |
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980 Universe::narrow_oop_shift() == 0, "invalid value"); |
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981 #endif |
| 0 | 982 |
| 983 // We will never reach the CATCH below since Exceptions::_throw will cause | |
| 984 // the VM to exit if an exception is thrown during initialization | |
| 985 | |
| 986 if (UseTLAB) { | |
| 987 assert(Universe::heap()->supports_tlab_allocation(), | |
| 988 "Should support thread-local allocation buffers"); | |
| 989 ThreadLocalAllocBuffer::startup_initialization(); | |
| 990 } | |
| 991 return JNI_OK; | |
| 992 } | |
| 993 | |
| 994 // It's the caller's repsonsibility to ensure glitch-freedom | |
| 995 // (if required). | |
| 996 void Universe::update_heap_info_at_gc() { | |
| 997 _heap_capacity_at_last_gc = heap()->capacity(); | |
| 998 _heap_used_at_last_gc = heap()->used(); | |
| 999 } | |
| 1000 | |
| 1001 | |
| 1002 | |
| 1003 void universe2_init() { | |
| 1004 EXCEPTION_MARK; | |
| 1005 Universe::genesis(CATCH); | |
| 1006 // Although we'd like to verify here that the state of the heap | |
| 1007 // is good, we can't because the main thread has not yet added | |
| 1008 // itself to the threads list (so, using current interfaces | |
| 1009 // we can't "fill" its TLAB), unless TLABs are disabled. | |
| 1010 if (VerifyBeforeGC && !UseTLAB && | |
| 1011 Universe::heap()->total_collections() >= VerifyGCStartAt) { | |
| 1012 Universe::heap()->prepare_for_verify(); | |
| 1013 Universe::verify(); // make sure we're starting with a clean slate | |
| 1014 } | |
| 1015 } | |
| 1016 | |
| 1017 | |
| 1018 // This function is defined in JVM.cpp | |
| 1019 extern void initialize_converter_functions(); | |
| 1020 | |
| 1021 bool universe_post_init() { | |
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1022 assert(!is_init_completed(), "Error: initialization not yet completed!"); |
| 0 | 1023 Universe::_fully_initialized = true; |
| 1024 EXCEPTION_MARK; | |
| 1025 { ResourceMark rm; | |
| 1026 Interpreter::initialize(); // needed for interpreter entry points | |
| 1027 if (!UseSharedSpaces) { | |
| 1142 | 1028 KlassHandle ok_h(THREAD, SystemDictionary::Object_klass()); |
| 0 | 1029 Universe::reinitialize_vtable_of(ok_h, CHECK_false); |
| 1030 Universe::reinitialize_itables(CHECK_false); | |
| 1031 } | |
| 1032 } | |
| 1033 | |
| 1034 klassOop k; | |
| 1035 instanceKlassHandle k_h; | |
| 1036 if (!UseSharedSpaces) { | |
| 1037 // Setup preallocated empty java.lang.Class array | |
| 1142 | 1038 Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false); |
| 0 | 1039 // Setup preallocated OutOfMemoryError errors |
| 1040 k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_OutOfMemoryError(), true, CHECK_false); | |
| 1041 k_h = instanceKlassHandle(THREAD, k); | |
| 1042 Universe::_out_of_memory_error_java_heap = k_h->allocate_permanent_instance(CHECK_false); | |
| 1043 Universe::_out_of_memory_error_perm_gen = k_h->allocate_permanent_instance(CHECK_false); | |
| 1044 Universe::_out_of_memory_error_array_size = k_h->allocate_permanent_instance(CHECK_false); | |
| 1045 Universe::_out_of_memory_error_gc_overhead_limit = | |
| 1046 k_h->allocate_permanent_instance(CHECK_false); | |
| 1047 | |
| 1048 // Setup preallocated NullPointerException | |
| 1049 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
| 1050 k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_NullPointerException(), true, CHECK_false); | |
| 1051 Universe::_null_ptr_exception_instance = instanceKlass::cast(k)->allocate_permanent_instance(CHECK_false); | |
| 1052 // Setup preallocated ArithmeticException | |
| 1053 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
| 1054 k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_ArithmeticException(), true, CHECK_false); | |
| 1055 Universe::_arithmetic_exception_instance = instanceKlass::cast(k)->allocate_permanent_instance(CHECK_false); | |
| 1056 // Virtual Machine Error for when we get into a situation we can't resolve | |
| 1057 k = SystemDictionary::resolve_or_fail( | |
| 1058 vmSymbolHandles::java_lang_VirtualMachineError(), true, CHECK_false); | |
| 1059 bool linked = instanceKlass::cast(k)->link_class_or_fail(CHECK_false); | |
| 1060 if (!linked) { | |
| 1061 tty->print_cr("Unable to link/verify VirtualMachineError class"); | |
| 1062 return false; // initialization failed | |
| 1063 } | |
| 1064 Universe::_virtual_machine_error_instance = | |
| 1065 instanceKlass::cast(k)->allocate_permanent_instance(CHECK_false); | |
| 1066 } | |
| 1067 if (!DumpSharedSpaces) { | |
| 1068 // These are the only Java fields that are currently set during shared space dumping. | |
| 1069 // We prefer to not handle this generally, so we always reinitialize these detail messages. | |
| 1070 Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false); | |
| 1071 java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg()); | |
| 1072 | |
| 1073 msg = java_lang_String::create_from_str("PermGen space", CHECK_false); | |
| 1074 java_lang_Throwable::set_message(Universe::_out_of_memory_error_perm_gen, msg()); | |
| 1075 | |
| 1076 msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false); | |
| 1077 java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg()); | |
| 1078 | |
| 1079 msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false); | |
| 1080 java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg()); | |
| 1081 | |
| 1082 msg = java_lang_String::create_from_str("/ by zero", CHECK_false); | |
| 1083 java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg()); | |
| 1084 | |
| 1085 // Setup the array of errors that have preallocated backtrace | |
| 1086 k = Universe::_out_of_memory_error_java_heap->klass(); | |
| 1087 assert(k->klass_part()->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error"); | |
| 1088 k_h = instanceKlassHandle(THREAD, k); | |
| 1089 | |
| 1090 int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0; | |
| 1091 Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false); | |
| 1092 for (int i=0; i<len; i++) { | |
| 1093 oop err = k_h->allocate_permanent_instance(CHECK_false); | |
| 1094 Handle err_h = Handle(THREAD, err); | |
| 1095 java_lang_Throwable::allocate_backtrace(err_h, CHECK_false); | |
| 1096 Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h()); | |
| 1097 } | |
| 1098 Universe::_preallocated_out_of_memory_error_avail_count = (jint)len; | |
| 1099 } | |
| 1100 | |
| 1101 | |
| 1102 // Setup static method for registering finalizers | |
| 1103 // The finalizer klass must be linked before looking up the method, in | |
| 1104 // case it needs to get rewritten. | |
| 1142 | 1105 instanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false); |
| 1106 methodOop m = instanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method( | |
| 0 | 1107 vmSymbols::register_method_name(), |
| 1108 vmSymbols::register_method_signature()); | |
| 1109 if (m == NULL || !m->is_static()) { | |
| 1110 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(), | |
| 1111 "java.lang.ref.Finalizer.register", false); | |
| 1112 } | |
| 1113 Universe::_finalizer_register_cache->init( | |
| 1142 | 1114 SystemDictionary::Finalizer_klass(), m, CHECK_false); |
| 0 | 1115 |
| 1116 // Resolve on first use and initialize class. | |
| 1117 // Note: No race-condition here, since a resolve will always return the same result | |
| 1118 | |
| 1119 // Setup method for security checks | |
| 1120 k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_reflect_Method(), true, CHECK_false); | |
| 1121 k_h = instanceKlassHandle(THREAD, k); | |
| 1122 k_h->link_class(CHECK_false); | |
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1123 m = k_h->find_method(vmSymbols::invoke_name(), vmSymbols::object_object_array_object_signature()); |
| 0 | 1124 if (m == NULL || m->is_static()) { |
| 1125 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(), | |
| 1126 "java.lang.reflect.Method.invoke", false); | |
| 1127 } | |
| 1128 Universe::_reflect_invoke_cache->init(k_h(), m, CHECK_false); | |
| 1129 | |
| 1130 // Setup method for registering loaded classes in class loader vector | |
| 1142 | 1131 instanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false); |
| 1132 m = instanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature()); | |
| 0 | 1133 if (m == NULL || m->is_static()) { |
| 1134 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(), | |
| 1135 "java.lang.ClassLoader.addClass", false); | |
| 1136 } | |
| 1137 Universe::_loader_addClass_cache->init( | |
| 1142 | 1138 SystemDictionary::ClassLoader_klass(), m, CHECK_false); |
| 0 | 1139 |
| 1140 // The folowing is initializing converter functions for serialization in | |
| 1141 // JVM.cpp. If we clean up the StrictMath code above we may want to find | |
| 1142 // a better solution for this as well. | |
| 1143 initialize_converter_functions(); | |
| 1144 | |
| 1145 // This needs to be done before the first scavenge/gc, since | |
| 1146 // it's an input to soft ref clearing policy. | |
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1147 { |
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1148 MutexLocker x(Heap_lock); |
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1149 Universe::update_heap_info_at_gc(); |
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1150 } |
| 0 | 1151 |
| 1152 // ("weak") refs processing infrastructure initialization | |
| 1153 Universe::heap()->post_initialize(); | |
| 1154 | |
| 1155 GC_locker::unlock(); // allow gc after bootstrapping | |
| 1156 | |
| 1157 MemoryService::set_universe_heap(Universe::_collectedHeap); | |
| 1158 return true; | |
| 1159 } | |
| 1160 | |
| 1161 | |
| 1162 void Universe::compute_base_vtable_size() { | |
| 1163 _base_vtable_size = ClassLoader::compute_Object_vtable(); | |
| 1164 } | |
| 1165 | |
| 1166 | |
| 1167 // %%% The Universe::flush_foo methods belong in CodeCache. | |
| 1168 | |
| 1169 // Flushes compiled methods dependent on dependee. | |
| 1170 void Universe::flush_dependents_on(instanceKlassHandle dependee) { | |
| 1171 assert_lock_strong(Compile_lock); | |
| 1172 | |
| 1173 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
| 1174 | |
| 1175 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1176 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1177 // holding the CodeCache_lock. | |
| 1178 | |
| 1179 DepChange changes(dependee); | |
| 1180 | |
| 1181 // Compute the dependent nmethods | |
| 1182 if (CodeCache::mark_for_deoptimization(changes) > 0) { | |
| 1183 // At least one nmethod has been marked for deoptimization | |
| 1184 VM_Deoptimize op; | |
| 1185 VMThread::execute(&op); | |
| 1186 } | |
| 1187 } | |
| 1188 | |
| 1189 #ifdef HOTSWAP | |
| 1190 // Flushes compiled methods dependent on dependee in the evolutionary sense | |
| 1191 void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) { | |
| 1192 // --- Compile_lock is not held. However we are at a safepoint. | |
| 1193 assert_locked_or_safepoint(Compile_lock); | |
| 1194 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
| 1195 | |
| 1196 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1197 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1198 // holding the CodeCache_lock. | |
| 1199 | |
| 1200 // Compute the dependent nmethods | |
| 1201 if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) { | |
| 1202 // At least one nmethod has been marked for deoptimization | |
| 1203 | |
| 1204 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
| 1205 // Stuff copied from VM_Deoptimize and modified slightly. | |
| 1206 | |
| 1207 // We do not want any GCs to happen while we are in the middle of this VM operation | |
| 1208 ResourceMark rm; | |
| 1209 DeoptimizationMarker dm; | |
| 1210 | |
| 1211 // Deoptimize all activations depending on marked nmethods | |
| 1212 Deoptimization::deoptimize_dependents(); | |
| 1213 | |
| 1214 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
| 1215 CodeCache::make_marked_nmethods_not_entrant(); | |
| 1216 } | |
| 1217 } | |
| 1218 #endif // HOTSWAP | |
| 1219 | |
| 1220 | |
| 1221 // Flushes compiled methods dependent on dependee | |
| 1222 void Universe::flush_dependents_on_method(methodHandle m_h) { | |
| 1223 // --- Compile_lock is not held. However we are at a safepoint. | |
| 1224 assert_locked_or_safepoint(Compile_lock); | |
| 1225 | |
| 1226 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1227 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1228 // holding the CodeCache_lock. | |
| 1229 | |
| 1230 // Compute the dependent nmethods | |
| 1231 if (CodeCache::mark_for_deoptimization(m_h()) > 0) { | |
| 1232 // At least one nmethod has been marked for deoptimization | |
| 1233 | |
| 1234 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
| 1235 // Stuff copied from VM_Deoptimize and modified slightly. | |
| 1236 | |
| 1237 // We do not want any GCs to happen while we are in the middle of this VM operation | |
| 1238 ResourceMark rm; | |
| 1239 DeoptimizationMarker dm; | |
| 1240 | |
| 1241 // Deoptimize all activations depending on marked nmethods | |
| 1242 Deoptimization::deoptimize_dependents(); | |
| 1243 | |
| 1244 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
| 1245 CodeCache::make_marked_nmethods_not_entrant(); | |
| 1246 } | |
| 1247 } | |
| 1248 | |
| 1249 void Universe::print() { print_on(gclog_or_tty); } | |
| 1250 | |
| 1251 void Universe::print_on(outputStream* st) { | |
| 1252 st->print_cr("Heap"); | |
| 1253 heap()->print_on(st); | |
| 1254 } | |
| 1255 | |
| 1256 void Universe::print_heap_at_SIGBREAK() { | |
| 1257 if (PrintHeapAtSIGBREAK) { | |
| 1258 MutexLocker hl(Heap_lock); | |
| 1259 print_on(tty); | |
| 1260 tty->cr(); | |
| 1261 tty->flush(); | |
| 1262 } | |
| 1263 } | |
| 1264 | |
| 1265 void Universe::print_heap_before_gc(outputStream* st) { | |
| 1266 st->print_cr("{Heap before GC invocations=%u (full %u):", | |
| 1267 heap()->total_collections(), | |
| 1268 heap()->total_full_collections()); | |
| 1269 heap()->print_on(st); | |
| 1270 } | |
| 1271 | |
| 1272 void Universe::print_heap_after_gc(outputStream* st) { | |
| 1273 st->print_cr("Heap after GC invocations=%u (full %u):", | |
| 1274 heap()->total_collections(), | |
| 1275 heap()->total_full_collections()); | |
| 1276 heap()->print_on(st); | |
| 1277 st->print_cr("}"); | |
| 1278 } | |
| 1279 | |
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1280 void Universe::verify(bool allow_dirty, bool silent, bool option) { |
| 0 | 1281 if (SharedSkipVerify) { |
| 1282 return; | |
| 1283 } | |
| 1284 | |
| 1285 // The use of _verify_in_progress is a temporary work around for | |
| 1286 // 6320749. Don't bother with a creating a class to set and clear | |
| 1287 // it since it is only used in this method and the control flow is | |
| 1288 // straight forward. | |
| 1289 _verify_in_progress = true; | |
| 1290 | |
| 1291 COMPILER2_PRESENT( | |
| 1292 assert(!DerivedPointerTable::is_active(), | |
| 1293 "DPT should not be active during verification " | |
| 1294 "(of thread stacks below)"); | |
| 1295 ) | |
| 1296 | |
| 1297 ResourceMark rm; | |
| 1298 HandleMark hm; // Handles created during verification can be zapped | |
| 1299 _verify_count++; | |
| 1300 | |
| 1301 if (!silent) gclog_or_tty->print("[Verifying "); | |
| 1302 if (!silent) gclog_or_tty->print("threads "); | |
| 1303 Threads::verify(); | |
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1304 heap()->verify(allow_dirty, silent, option); |
| 0 | 1305 |
| 1306 if (!silent) gclog_or_tty->print("syms "); | |
| 1307 SymbolTable::verify(); | |
| 1308 if (!silent) gclog_or_tty->print("strs "); | |
| 1309 StringTable::verify(); | |
| 1310 { | |
| 1311 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1312 if (!silent) gclog_or_tty->print("zone "); | |
| 1313 CodeCache::verify(); | |
| 1314 } | |
| 1315 if (!silent) gclog_or_tty->print("dict "); | |
| 1316 SystemDictionary::verify(); | |
| 1317 if (!silent) gclog_or_tty->print("hand "); | |
| 1318 JNIHandles::verify(); | |
| 1319 if (!silent) gclog_or_tty->print("C-heap "); | |
| 1320 os::check_heap(); | |
| 1321 if (!silent) gclog_or_tty->print_cr("]"); | |
| 1322 | |
| 1323 _verify_in_progress = false; | |
| 1324 } | |
| 1325 | |
| 1326 // Oop verification (see MacroAssembler::verify_oop) | |
| 1327 | |
| 1328 static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1}; | |
| 1329 static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1}; | |
| 1330 | |
| 1331 | |
| 1332 static void calculate_verify_data(uintptr_t verify_data[2], | |
| 1333 HeapWord* low_boundary, | |
| 1334 HeapWord* high_boundary) { | |
| 1335 assert(low_boundary < high_boundary, "bad interval"); | |
| 1336 | |
| 1337 // decide which low-order bits we require to be clear: | |
| 1338 size_t alignSize = MinObjAlignmentInBytes; | |
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1339 size_t min_object_size = CollectedHeap::min_fill_size(); |
| 0 | 1340 |
| 1341 // make an inclusive limit: | |
| 1342 uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize; | |
| 1343 uintptr_t min = (uintptr_t)low_boundary; | |
| 1344 assert(min < max, "bad interval"); | |
| 1345 uintptr_t diff = max ^ min; | |
| 1346 | |
| 1347 // throw away enough low-order bits to make the diff vanish | |
| 1348 uintptr_t mask = (uintptr_t)(-1); | |
| 1349 while ((mask & diff) != 0) | |
| 1350 mask <<= 1; | |
| 1351 uintptr_t bits = (min & mask); | |
| 1352 assert(bits == (max & mask), "correct mask"); | |
| 1353 // check an intermediate value between min and max, just to make sure: | |
| 1354 assert(bits == ((min + (max-min)/2) & mask), "correct mask"); | |
| 1355 | |
| 1356 // require address alignment, too: | |
| 1357 mask |= (alignSize - 1); | |
| 1358 | |
| 1359 if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) { | |
| 1360 assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability"); | |
| 1361 } | |
| 1362 verify_data[0] = mask; | |
| 1363 verify_data[1] = bits; | |
| 1364 } | |
| 1365 | |
| 1366 | |
| 1367 // Oop verification (see MacroAssembler::verify_oop) | |
| 1368 #ifndef PRODUCT | |
| 1369 | |
| 1370 uintptr_t Universe::verify_oop_mask() { | |
| 1371 MemRegion m = heap()->reserved_region(); | |
| 1372 calculate_verify_data(_verify_oop_data, | |
| 1373 m.start(), | |
| 1374 m.end()); | |
| 1375 return _verify_oop_data[0]; | |
| 1376 } | |
| 1377 | |
| 1378 | |
| 1379 | |
| 1380 uintptr_t Universe::verify_oop_bits() { | |
| 1381 verify_oop_mask(); | |
| 1382 return _verify_oop_data[1]; | |
| 1383 } | |
| 1384 | |
| 1385 | |
| 1386 uintptr_t Universe::verify_klass_mask() { | |
| 1387 /* $$$ | |
| 1388 // A klass can never live in the new space. Since the new and old | |
| 1389 // spaces can change size, we must settle for bounds-checking against | |
| 1390 // the bottom of the world, plus the smallest possible new and old | |
| 1391 // space sizes that may arise during execution. | |
| 1392 size_t min_new_size = Universe::new_size(); // in bytes | |
| 1393 size_t min_old_size = Universe::old_size(); // in bytes | |
| 1394 calculate_verify_data(_verify_klass_data, | |
| 1395 (HeapWord*)((uintptr_t)_new_gen->low_boundary + min_new_size + min_old_size), | |
| 1396 _perm_gen->high_boundary); | |
| 1397 */ | |
| 1398 // Why doesn't the above just say that klass's always live in the perm | |
| 1399 // gen? I'll see if that seems to work... | |
| 1400 MemRegion permanent_reserved; | |
| 1401 switch (Universe::heap()->kind()) { | |
| 1402 default: | |
| 1403 // ???: What if a CollectedHeap doesn't have a permanent generation? | |
| 1404 ShouldNotReachHere(); | |
| 1405 break; | |
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1406 case CollectedHeap::GenCollectedHeap: |
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1407 case CollectedHeap::G1CollectedHeap: { |
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1408 SharedHeap* sh = (SharedHeap*) Universe::heap(); |
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1409 permanent_reserved = sh->perm_gen()->reserved(); |
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1410 break; |
| 0 | 1411 } |
| 1412 #ifndef SERIALGC | |
| 1413 case CollectedHeap::ParallelScavengeHeap: { | |
| 1414 ParallelScavengeHeap* psh = (ParallelScavengeHeap*) Universe::heap(); | |
| 1415 permanent_reserved = psh->perm_gen()->reserved(); | |
| 1416 break; | |
| 1417 } | |
| 1418 #endif // SERIALGC | |
| 1419 } | |
| 1420 calculate_verify_data(_verify_klass_data, | |
| 1421 permanent_reserved.start(), | |
| 1422 permanent_reserved.end()); | |
| 1423 | |
| 1424 return _verify_klass_data[0]; | |
| 1425 } | |
| 1426 | |
| 1427 | |
| 1428 | |
| 1429 uintptr_t Universe::verify_klass_bits() { | |
| 1430 verify_klass_mask(); | |
| 1431 return _verify_klass_data[1]; | |
| 1432 } | |
| 1433 | |
| 1434 | |
| 1435 uintptr_t Universe::verify_mark_mask() { | |
| 1436 return markOopDesc::lock_mask_in_place; | |
| 1437 } | |
| 1438 | |
| 1439 | |
| 1440 | |
| 1441 uintptr_t Universe::verify_mark_bits() { | |
| 1442 intptr_t mask = verify_mark_mask(); | |
| 1443 intptr_t bits = (intptr_t)markOopDesc::prototype(); | |
| 1444 assert((bits & ~mask) == 0, "no stray header bits"); | |
| 1445 return bits; | |
| 1446 } | |
| 1447 #endif // PRODUCT | |
| 1448 | |
| 1449 | |
| 1450 void Universe::compute_verify_oop_data() { | |
| 1451 verify_oop_mask(); | |
| 1452 verify_oop_bits(); | |
| 1453 verify_mark_mask(); | |
| 1454 verify_mark_bits(); | |
| 1455 verify_klass_mask(); | |
| 1456 verify_klass_bits(); | |
| 1457 } | |
| 1458 | |
| 1459 | |
| 1460 void CommonMethodOopCache::init(klassOop k, methodOop m, TRAPS) { | |
| 1461 if (!UseSharedSpaces) { | |
| 1462 _klass = k; | |
| 1463 } | |
| 1464 #ifndef PRODUCT | |
| 1465 else { | |
| 1466 // sharing initilization should have already set up _klass | |
| 1467 assert(_klass != NULL, "just checking"); | |
| 1468 } | |
| 1469 #endif | |
| 1470 | |
| 1471 _method_idnum = m->method_idnum(); | |
| 1472 assert(_method_idnum >= 0, "sanity check"); | |
| 1473 } | |
| 1474 | |
| 1475 | |
| 1476 ActiveMethodOopsCache::~ActiveMethodOopsCache() { | |
| 1477 if (_prev_methods != NULL) { | |
| 1478 for (int i = _prev_methods->length() - 1; i >= 0; i--) { | |
| 1479 jweak method_ref = _prev_methods->at(i); | |
| 1480 if (method_ref != NULL) { | |
| 1481 JNIHandles::destroy_weak_global(method_ref); | |
| 1482 } | |
| 1483 } | |
| 1484 delete _prev_methods; | |
| 1485 _prev_methods = NULL; | |
| 1486 } | |
| 1487 } | |
| 1488 | |
| 1489 | |
| 1490 void ActiveMethodOopsCache::add_previous_version(const methodOop method) { | |
| 1491 assert(Thread::current()->is_VM_thread(), | |
| 1492 "only VMThread can add previous versions"); | |
| 1493 | |
| 1494 if (_prev_methods == NULL) { | |
| 1495 // This is the first previous version so make some space. | |
| 1496 // Start with 2 elements under the assumption that the class | |
| 1497 // won't be redefined much. | |
| 1498 _prev_methods = new (ResourceObj::C_HEAP) GrowableArray<jweak>(2, true); | |
| 1499 } | |
| 1500 | |
| 1501 // RC_TRACE macro has an embedded ResourceMark | |
| 1502 RC_TRACE(0x00000100, | |
| 1503 ("add: %s(%s): adding prev version ref for cached method @%d", | |
| 1504 method->name()->as_C_string(), method->signature()->as_C_string(), | |
| 1505 _prev_methods->length())); | |
| 1506 | |
| 1507 methodHandle method_h(method); | |
| 1508 jweak method_ref = JNIHandles::make_weak_global(method_h); | |
| 1509 _prev_methods->append(method_ref); | |
| 1510 | |
| 1511 // Using weak references allows previous versions of the cached | |
| 1512 // method to be GC'ed when they are no longer needed. Since the | |
| 1513 // caller is the VMThread and we are at a safepoint, this is a good | |
| 1514 // time to clear out unused weak references. | |
| 1515 | |
| 1516 for (int i = _prev_methods->length() - 1; i >= 0; i--) { | |
| 1517 jweak method_ref = _prev_methods->at(i); | |
| 1518 assert(method_ref != NULL, "weak method ref was unexpectedly cleared"); | |
| 1519 if (method_ref == NULL) { | |
| 1520 _prev_methods->remove_at(i); | |
| 1521 // Since we are traversing the array backwards, we don't have to | |
| 1522 // do anything special with the index. | |
| 1523 continue; // robustness | |
| 1524 } | |
| 1525 | |
| 1526 methodOop m = (methodOop)JNIHandles::resolve(method_ref); | |
| 1527 if (m == NULL) { | |
| 1528 // this method entry has been GC'ed so remove it | |
| 1529 JNIHandles::destroy_weak_global(method_ref); | |
| 1530 _prev_methods->remove_at(i); | |
| 1531 } else { | |
| 1532 // RC_TRACE macro has an embedded ResourceMark | |
| 1533 RC_TRACE(0x00000400, ("add: %s(%s): previous cached method @%d is alive", | |
| 1534 m->name()->as_C_string(), m->signature()->as_C_string(), i)); | |
| 1535 } | |
| 1536 } | |
| 1537 } // end add_previous_version() | |
| 1538 | |
| 1539 | |
| 1540 bool ActiveMethodOopsCache::is_same_method(const methodOop method) const { | |
| 1541 instanceKlass* ik = instanceKlass::cast(klass()); | |
| 1542 methodOop check_method = ik->method_with_idnum(method_idnum()); | |
| 1543 assert(check_method != NULL, "sanity check"); | |
| 1544 if (check_method == method) { | |
| 1545 // done with the easy case | |
| 1546 return true; | |
| 1547 } | |
| 1548 | |
| 1549 if (_prev_methods != NULL) { | |
| 1550 // The cached method has been redefined at least once so search | |
| 1551 // the previous versions for a match. | |
| 1552 for (int i = 0; i < _prev_methods->length(); i++) { | |
| 1553 jweak method_ref = _prev_methods->at(i); | |
| 1554 assert(method_ref != NULL, "weak method ref was unexpectedly cleared"); | |
| 1555 if (method_ref == NULL) { | |
| 1556 continue; // robustness | |
| 1557 } | |
| 1558 | |
| 1559 check_method = (methodOop)JNIHandles::resolve(method_ref); | |
| 1560 if (check_method == method) { | |
| 1561 // a previous version matches | |
| 1562 return true; | |
| 1563 } | |
| 1564 } | |
| 1565 } | |
| 1566 | |
| 1567 // either no previous versions or no previous version matched | |
| 1568 return false; | |
| 1569 } | |
| 1570 | |
| 1571 | |
| 1572 methodOop LatestMethodOopCache::get_methodOop() { | |
| 1573 instanceKlass* ik = instanceKlass::cast(klass()); | |
| 1574 methodOop m = ik->method_with_idnum(method_idnum()); | |
| 1575 assert(m != NULL, "sanity check"); | |
| 1576 return m; | |
| 1577 } | |
| 1578 | |
| 1579 | |
| 1580 #ifdef ASSERT | |
| 1581 // Release dummy object(s) at bottom of heap | |
| 1582 bool Universe::release_fullgc_alot_dummy() { | |
| 1583 MutexLocker ml(FullGCALot_lock); | |
| 1584 if (_fullgc_alot_dummy_array != NULL) { | |
| 1585 if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) { | |
| 1586 // No more dummies to release, release entire array instead | |
| 1587 _fullgc_alot_dummy_array = NULL; | |
| 1588 return false; | |
| 1589 } | |
| 1590 if (!UseConcMarkSweepGC) { | |
| 1591 // Release dummy at bottom of old generation | |
| 1592 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
| 1593 } | |
| 1594 // Release dummy at bottom of permanent generation | |
| 1595 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
| 1596 } | |
| 1597 return true; | |
| 1598 } | |
| 1599 | |
| 1600 #endif // ASSERT |