Mercurial > hg > truffle
annotate src/share/vm/memory/universe.hpp @ 6182:765ee2d1674b
7157365: jruby/bench.bench_timeout crashes with JVM internal error
Reviewed-by: jrose, kvn
| author | twisti |
|---|---|
| date | Mon, 18 Jun 2012 15:17:30 -0700 |
| parents | b632e80fc9dc |
| children | 24b9c7f4cae6 |
| rev | line source |
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| 0 | 1 /* |
| 6008 | 2 * Copyright (c) 1997, 2012, 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 #ifndef SHARE_VM_MEMORY_UNIVERSE_HPP |
| 26 #define SHARE_VM_MEMORY_UNIVERSE_HPP | |
| 27 | |
| 28 #include "runtime/handles.hpp" | |
| 29 #include "utilities/growableArray.hpp" | |
| 30 | |
| 0 | 31 // Universe is a name space holding known system classes and objects in the VM. |
| 32 // | |
| 33 // Loaded classes are accessible through the SystemDictionary. | |
| 34 // | |
| 35 // The object heap is allocated and accessed through Universe, and various allocation | |
| 36 // support is provided. Allocation by the interpreter and compiled code is done inline | |
| 37 // and bails out to Scavenge::invoke_and_allocate. | |
| 38 | |
| 39 class CollectedHeap; | |
| 40 class DeferredObjAllocEvent; | |
| 41 | |
| 42 | |
| 43 // Common parts of a methodOop cache. This cache safely interacts with | |
| 44 // the RedefineClasses API. | |
| 45 // | |
| 46 class CommonMethodOopCache : public CHeapObj { | |
| 47 // We save the klassOop and the idnum of methodOop in order to get | |
| 48 // the current cached methodOop. | |
| 49 private: | |
| 50 klassOop _klass; | |
| 51 int _method_idnum; | |
| 52 | |
| 53 public: | |
| 54 CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; } | |
| 55 ~CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; } | |
| 56 | |
| 57 void init(klassOop k, methodOop m, TRAPS); | |
| 58 klassOop klass() const { return _klass; } | |
| 59 int method_idnum() const { return _method_idnum; } | |
| 60 | |
| 61 // GC support | |
| 62 void oops_do(OopClosure* f) { f->do_oop((oop*)&_klass); } | |
| 63 }; | |
| 64 | |
| 65 | |
| 66 // A helper class for caching a methodOop when the user of the cache | |
| 67 // cares about all versions of the methodOop. | |
| 68 // | |
| 69 class ActiveMethodOopsCache : public CommonMethodOopCache { | |
| 70 // This subclass adds weak references to older versions of the | |
| 71 // methodOop and a query method for a methodOop. | |
| 72 | |
| 73 private: | |
| 74 // If the cached methodOop has not been redefined, then | |
| 75 // _prev_methods will be NULL. If all of the previous | |
| 76 // versions of the method have been collected, then | |
| 77 // _prev_methods can have a length of zero. | |
| 78 GrowableArray<jweak>* _prev_methods; | |
| 79 | |
| 80 public: | |
| 81 ActiveMethodOopsCache() { _prev_methods = NULL; } | |
| 82 ~ActiveMethodOopsCache(); | |
| 83 | |
| 84 void add_previous_version(const methodOop method); | |
| 85 bool is_same_method(const methodOop method) const; | |
| 86 }; | |
| 87 | |
| 88 | |
| 89 // A helper class for caching a methodOop when the user of the cache | |
| 90 // only cares about the latest version of the methodOop. | |
| 91 // | |
| 92 class LatestMethodOopCache : public CommonMethodOopCache { | |
| 93 // This subclass adds a getter method for the latest methodOop. | |
| 94 | |
| 95 public: | |
| 96 methodOop get_methodOop(); | |
| 97 }; | |
| 98 | |
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99 // For UseCompressedOops. |
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100 struct NarrowOopStruct { |
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101 // Base address for oop-within-java-object materialization. |
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102 // NULL if using wide oops or zero based narrow oops. |
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103 address _base; |
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104 // Number of shift bits for encoding/decoding narrow oops. |
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105 // 0 if using wide oops or zero based unscaled narrow oops, |
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106 // LogMinObjAlignmentInBytes otherwise. |
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107 int _shift; |
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108 // Generate code with implicit null checks for narrow oops. |
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109 bool _use_implicit_null_checks; |
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110 }; |
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111 |
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112 enum VerifyOption { |
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113 VerifyOption_Default = 0, |
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114 |
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115 // G1 |
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116 VerifyOption_G1UsePrevMarking = VerifyOption_Default, |
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117 VerifyOption_G1UseNextMarking = VerifyOption_G1UsePrevMarking + 1, |
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118 VerifyOption_G1UseMarkWord = VerifyOption_G1UseNextMarking + 1 |
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119 }; |
| 0 | 120 |
| 121 class Universe: AllStatic { | |
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122 // Ugh. Universe is much too friendly. |
| 0 | 123 friend class MarkSweep; |
| 124 friend class oopDesc; | |
| 125 friend class ClassLoader; | |
| 126 friend class Arguments; | |
| 127 friend class SystemDictionary; | |
| 128 friend class VMStructs; | |
| 129 friend class CompactingPermGenGen; | |
| 130 friend class VM_PopulateDumpSharedSpace; | |
| 131 | |
| 132 friend jint universe_init(); | |
| 133 friend void universe2_init(); | |
| 134 friend bool universe_post_init(); | |
| 135 | |
| 136 private: | |
| 137 // Known classes in the VM | |
| 138 static klassOop _boolArrayKlassObj; | |
| 139 static klassOop _byteArrayKlassObj; | |
| 140 static klassOop _charArrayKlassObj; | |
| 141 static klassOop _intArrayKlassObj; | |
| 142 static klassOop _shortArrayKlassObj; | |
| 143 static klassOop _longArrayKlassObj; | |
| 144 static klassOop _singleArrayKlassObj; | |
| 145 static klassOop _doubleArrayKlassObj; | |
| 146 static klassOop _typeArrayKlassObjs[T_VOID+1]; | |
| 147 | |
| 148 static klassOop _objectArrayKlassObj; | |
| 149 | |
| 150 static klassOop _methodKlassObj; | |
| 151 static klassOop _constMethodKlassObj; | |
| 152 static klassOop _methodDataKlassObj; | |
| 153 static klassOop _klassKlassObj; | |
| 154 static klassOop _arrayKlassKlassObj; | |
| 155 static klassOop _objArrayKlassKlassObj; | |
| 156 static klassOop _typeArrayKlassKlassObj; | |
| 157 static klassOop _instanceKlassKlassObj; | |
| 158 static klassOop _constantPoolKlassObj; | |
| 159 static klassOop _constantPoolCacheKlassObj; | |
| 160 static klassOop _compiledICHolderKlassObj; | |
| 161 static klassOop _systemObjArrayKlassObj; | |
| 162 | |
| 163 // Known objects in the VM | |
| 164 | |
| 165 // Primitive objects | |
| 166 static oop _int_mirror; | |
| 167 static oop _float_mirror; | |
| 168 static oop _double_mirror; | |
| 169 static oop _byte_mirror; | |
| 170 static oop _bool_mirror; | |
| 171 static oop _char_mirror; | |
| 172 static oop _long_mirror; | |
| 173 static oop _short_mirror; | |
| 174 static oop _void_mirror; | |
| 175 | |
| 176 static oop _main_thread_group; // Reference to the main thread group object | |
| 177 static oop _system_thread_group; // Reference to the system thread group object | |
| 178 | |
| 179 static typeArrayOop _the_empty_byte_array; // Canonicalized byte array | |
| 180 static typeArrayOop _the_empty_short_array; // Canonicalized short array | |
| 181 static typeArrayOop _the_empty_int_array; // Canonicalized int array | |
| 182 static objArrayOop _the_empty_system_obj_array; // Canonicalized system obj array | |
| 183 static objArrayOop _the_empty_class_klass_array; // Canonicalized obj array of type java.lang.Class | |
| 184 static objArrayOop _the_array_interfaces_array; // Canonicalized 2-array of cloneable & serializable klasses | |
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185 static oop _the_null_string; // A cache of "null" as a Java string |
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186 static oop _the_min_jint_string; // A cache of "-2147483648" as a Java string |
| 0 | 187 static LatestMethodOopCache* _finalizer_register_cache; // static method for registering finalizable objects |
| 188 static LatestMethodOopCache* _loader_addClass_cache; // method for registering loaded classes in class loader vector | |
| 189 static ActiveMethodOopsCache* _reflect_invoke_cache; // method for security checks | |
| 190 static oop _out_of_memory_error_java_heap; // preallocated error object (no backtrace) | |
| 191 static oop _out_of_memory_error_perm_gen; // preallocated error object (no backtrace) | |
| 192 static oop _out_of_memory_error_array_size;// preallocated error object (no backtrace) | |
| 193 static oop _out_of_memory_error_gc_overhead_limit; // preallocated error object (no backtrace) | |
| 194 | |
| 195 // array of preallocated error objects with backtrace | |
| 196 static objArrayOop _preallocated_out_of_memory_error_array; | |
| 197 | |
| 198 // number of preallocated error objects available for use | |
| 199 static volatile jint _preallocated_out_of_memory_error_avail_count; | |
| 200 | |
| 201 static oop _null_ptr_exception_instance; // preallocated exception object | |
| 202 static oop _arithmetic_exception_instance; // preallocated exception object | |
| 203 static oop _virtual_machine_error_instance; // preallocated exception object | |
| 204 // The object used as an exception dummy when exceptions are thrown for | |
| 205 // the vm thread. | |
| 206 static oop _vm_exception; | |
| 207 | |
| 208 // The particular choice of collected heap. | |
| 209 static CollectedHeap* _collectedHeap; | |
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210 |
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211 // For UseCompressedOops. |
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212 static struct NarrowOopStruct _narrow_oop; |
| 0 | 213 |
| 214 // array of dummy objects used with +FullGCAlot | |
| 215 debug_only(static objArrayOop _fullgc_alot_dummy_array;) | |
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216 // index of next entry to clear |
| 0 | 217 debug_only(static int _fullgc_alot_dummy_next;) |
| 218 | |
| 219 // Compiler/dispatch support | |
| 220 static int _base_vtable_size; // Java vtbl size of klass Object (in words) | |
| 221 | |
| 222 // Initialization | |
| 223 static bool _bootstrapping; // true during genesis | |
| 224 static bool _fully_initialized; // true after universe_init and initialize_vtables called | |
| 225 | |
| 226 // the array of preallocated errors with backtraces | |
| 227 static objArrayOop preallocated_out_of_memory_errors() { return _preallocated_out_of_memory_error_array; } | |
| 228 | |
| 229 // generate an out of memory error; if possible using an error with preallocated backtrace; | |
| 230 // otherwise return the given default error. | |
| 231 static oop gen_out_of_memory_error(oop default_err); | |
| 232 | |
| 233 // Historic gc information | |
| 234 static size_t _heap_capacity_at_last_gc; | |
| 235 static size_t _heap_used_at_last_gc; | |
| 236 | |
| 237 static jint initialize_heap(); | |
| 238 static void initialize_basic_type_mirrors(TRAPS); | |
| 239 static void fixup_mirrors(TRAPS); | |
| 240 | |
| 241 static void reinitialize_vtable_of(KlassHandle h_k, TRAPS); | |
| 242 static void reinitialize_itables(TRAPS); | |
| 243 static void compute_base_vtable_size(); // compute vtable size of class Object | |
| 244 | |
| 245 static void genesis(TRAPS); // Create the initial world | |
| 246 | |
| 247 // Mirrors for primitive classes (created eagerly) | |
| 248 static oop check_mirror(oop m) { | |
| 249 assert(m != NULL, "mirror not initialized"); | |
| 250 return m; | |
| 251 } | |
| 252 | |
| 253 // Debugging | |
| 254 static int _verify_count; // number of verifies done | |
| 255 // True during call to verify(). Should only be set/cleared in verify(). | |
| 256 static bool _verify_in_progress; | |
| 257 | |
| 258 static void compute_verify_oop_data(); | |
| 259 | |
| 260 public: | |
| 261 // Known classes in the VM | |
| 262 static klassOop boolArrayKlassObj() { return _boolArrayKlassObj; } | |
| 263 static klassOop byteArrayKlassObj() { return _byteArrayKlassObj; } | |
| 264 static klassOop charArrayKlassObj() { return _charArrayKlassObj; } | |
| 265 static klassOop intArrayKlassObj() { return _intArrayKlassObj; } | |
| 266 static klassOop shortArrayKlassObj() { return _shortArrayKlassObj; } | |
| 267 static klassOop longArrayKlassObj() { return _longArrayKlassObj; } | |
| 268 static klassOop singleArrayKlassObj() { return _singleArrayKlassObj; } | |
| 269 static klassOop doubleArrayKlassObj() { return _doubleArrayKlassObj; } | |
| 270 | |
| 271 static klassOop objectArrayKlassObj() { | |
| 272 return _objectArrayKlassObj; | |
| 273 } | |
| 274 | |
| 275 static klassOop typeArrayKlassObj(BasicType t) { | |
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276 assert((uint)t < T_VOID+1, err_msg("range check for type: %s", type2name(t))); |
| 0 | 277 assert(_typeArrayKlassObjs[t] != NULL, "domain check"); |
| 278 return _typeArrayKlassObjs[t]; | |
| 279 } | |
| 280 | |
| 281 static klassOop methodKlassObj() { return _methodKlassObj; } | |
| 282 static klassOop constMethodKlassObj() { return _constMethodKlassObj; } | |
| 283 static klassOop methodDataKlassObj() { return _methodDataKlassObj; } | |
| 284 static klassOop klassKlassObj() { return _klassKlassObj; } | |
| 285 static klassOop arrayKlassKlassObj() { return _arrayKlassKlassObj; } | |
| 286 static klassOop objArrayKlassKlassObj() { return _objArrayKlassKlassObj; } | |
| 287 static klassOop typeArrayKlassKlassObj() { return _typeArrayKlassKlassObj; } | |
| 288 static klassOop instanceKlassKlassObj() { return _instanceKlassKlassObj; } | |
| 289 static klassOop constantPoolKlassObj() { return _constantPoolKlassObj; } | |
| 290 static klassOop constantPoolCacheKlassObj() { return _constantPoolCacheKlassObj; } | |
| 291 static klassOop compiledICHolderKlassObj() { return _compiledICHolderKlassObj; } | |
| 292 static klassOop systemObjArrayKlassObj() { return _systemObjArrayKlassObj; } | |
| 293 | |
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294 // Known objects in the VM |
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295 static oop int_mirror() { return check_mirror(_int_mirror); } |
| 0 | 296 static oop float_mirror() { return check_mirror(_float_mirror); } |
| 297 static oop double_mirror() { return check_mirror(_double_mirror); } | |
| 298 static oop byte_mirror() { return check_mirror(_byte_mirror); } | |
| 299 static oop bool_mirror() { return check_mirror(_bool_mirror); } | |
| 300 static oop char_mirror() { return check_mirror(_char_mirror); } | |
| 301 static oop long_mirror() { return check_mirror(_long_mirror); } | |
| 302 static oop short_mirror() { return check_mirror(_short_mirror); } | |
| 303 static oop void_mirror() { return check_mirror(_void_mirror); } | |
| 304 | |
| 305 // table of same | |
| 306 static oop _mirrors[T_VOID+1]; | |
| 307 | |
| 308 static oop java_mirror(BasicType t) { | |
| 309 assert((uint)t < T_VOID+1, "range check"); | |
| 310 return check_mirror(_mirrors[t]); | |
| 311 } | |
| 312 static oop main_thread_group() { return _main_thread_group; } | |
| 313 static void set_main_thread_group(oop group) { _main_thread_group = group;} | |
| 314 | |
| 315 static oop system_thread_group() { return _system_thread_group; } | |
| 316 static void set_system_thread_group(oop group) { _system_thread_group = group;} | |
| 317 | |
| 318 static typeArrayOop the_empty_byte_array() { return _the_empty_byte_array; } | |
| 319 static typeArrayOop the_empty_short_array() { return _the_empty_short_array; } | |
| 320 static typeArrayOop the_empty_int_array() { return _the_empty_int_array; } | |
| 321 static objArrayOop the_empty_system_obj_array () { return _the_empty_system_obj_array; } | |
| 322 static objArrayOop the_empty_class_klass_array () { return _the_empty_class_klass_array; } | |
| 323 static objArrayOop the_array_interfaces_array() { return _the_array_interfaces_array; } | |
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324 static oop the_null_string() { return _the_null_string; } |
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325 static oop the_min_jint_string() { return _the_min_jint_string; } |
| 0 | 326 static methodOop finalizer_register_method() { return _finalizer_register_cache->get_methodOop(); } |
| 327 static methodOop loader_addClass_method() { return _loader_addClass_cache->get_methodOop(); } | |
| 328 static ActiveMethodOopsCache* reflect_invoke_cache() { return _reflect_invoke_cache; } | |
| 329 static oop null_ptr_exception_instance() { return _null_ptr_exception_instance; } | |
| 330 static oop arithmetic_exception_instance() { return _arithmetic_exception_instance; } | |
| 331 static oop virtual_machine_error_instance() { return _virtual_machine_error_instance; } | |
| 332 static oop vm_exception() { return _vm_exception; } | |
| 333 | |
| 334 // OutOfMemoryError support. Returns an error with the required message. The returned error | |
| 335 // may or may not have a backtrace. If error has a backtrace then the stack trace is already | |
| 336 // filled in. | |
| 337 static oop out_of_memory_error_java_heap() { return gen_out_of_memory_error(_out_of_memory_error_java_heap); } | |
| 338 static oop out_of_memory_error_perm_gen() { return gen_out_of_memory_error(_out_of_memory_error_perm_gen); } | |
| 339 static oop out_of_memory_error_array_size() { return gen_out_of_memory_error(_out_of_memory_error_array_size); } | |
| 340 static oop out_of_memory_error_gc_overhead_limit() { return gen_out_of_memory_error(_out_of_memory_error_gc_overhead_limit); } | |
| 341 | |
| 342 // Accessors needed for fast allocation | |
| 343 static klassOop* boolArrayKlassObj_addr() { return &_boolArrayKlassObj; } | |
| 344 static klassOop* byteArrayKlassObj_addr() { return &_byteArrayKlassObj; } | |
| 345 static klassOop* charArrayKlassObj_addr() { return &_charArrayKlassObj; } | |
| 346 static klassOop* intArrayKlassObj_addr() { return &_intArrayKlassObj; } | |
| 347 static klassOop* shortArrayKlassObj_addr() { return &_shortArrayKlassObj; } | |
| 348 static klassOop* longArrayKlassObj_addr() { return &_longArrayKlassObj; } | |
| 349 static klassOop* singleArrayKlassObj_addr() { return &_singleArrayKlassObj; } | |
| 350 static klassOop* doubleArrayKlassObj_addr() { return &_doubleArrayKlassObj; } | |
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351 static klassOop* systemObjArrayKlassObj_addr() { return &_systemObjArrayKlassObj; } |
| 0 | 352 |
| 353 // The particular choice of collected heap. | |
| 354 static CollectedHeap* heap() { return _collectedHeap; } | |
| 355 | |
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356 // For UseCompressedOops |
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357 static address* narrow_oop_base_addr() { return &_narrow_oop._base; } |
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358 static address narrow_oop_base() { return _narrow_oop._base; } |
| 858 | 359 static bool is_narrow_oop_base(void* addr) { return (narrow_oop_base() == (address)addr); } |
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360 static int narrow_oop_shift() { return _narrow_oop._shift; } |
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361 static void set_narrow_oop_base(address base) { _narrow_oop._base = base; } |
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362 static void set_narrow_oop_shift(int shift) { _narrow_oop._shift = shift; } |
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363 static bool narrow_oop_use_implicit_null_checks() { return _narrow_oop._use_implicit_null_checks; } |
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364 static void set_narrow_oop_use_implicit_null_checks(bool use) { _narrow_oop._use_implicit_null_checks = use; } |
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365 // Narrow Oop encoding mode: |
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366 // 0 - Use 32-bits oops without encoding when |
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367 // NarrowOopHeapBaseMin + heap_size < 4Gb |
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368 // 1 - Use zero based compressed oops with encoding when |
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369 // NarrowOopHeapBaseMin + heap_size < 32Gb |
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370 // 2 - Use compressed oops with heap base + encoding. |
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371 enum NARROW_OOP_MODE { |
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372 UnscaledNarrowOop = 0, |
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373 ZeroBasedNarrowOop = 1, |
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374 HeapBasedNarrowOop = 2 |
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375 }; |
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376 static char* preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode); |
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377 |
| 0 | 378 // Historic gc information |
| 379 static size_t get_heap_capacity_at_last_gc() { return _heap_capacity_at_last_gc; } | |
| 380 static size_t get_heap_free_at_last_gc() { return _heap_capacity_at_last_gc - _heap_used_at_last_gc; } | |
| 381 static size_t get_heap_used_at_last_gc() { return _heap_used_at_last_gc; } | |
| 382 static void update_heap_info_at_gc(); | |
| 383 | |
| 384 // Testers | |
| 385 static bool is_bootstrapping() { return _bootstrapping; } | |
| 386 static bool is_fully_initialized() { return _fully_initialized; } | |
| 387 | |
| 388 static inline bool element_type_should_be_aligned(BasicType type); | |
| 389 static inline bool field_type_should_be_aligned(BasicType type); | |
| 390 static bool on_page_boundary(void* addr); | |
| 391 static bool should_fill_in_stack_trace(Handle throwable); | |
| 392 static void check_alignment(uintx size, uintx alignment, const char* name); | |
| 393 | |
| 394 // Finalizer support. | |
| 395 static void run_finalizers_on_exit(); | |
| 396 | |
| 397 // Iteration | |
| 398 | |
| 399 // Apply "f" to the addresses of all the direct heap pointers maintained | |
| 400 // as static fields of "Universe". | |
| 401 static void oops_do(OopClosure* f, bool do_all = false); | |
| 402 | |
| 403 // Apply "f" to all klasses for basic types (classes not present in | |
| 404 // SystemDictionary). | |
| 405 static void basic_type_classes_do(void f(klassOop)); | |
| 406 | |
| 407 // Apply "f" to all system klasses (classes not present in SystemDictionary). | |
| 408 static void system_classes_do(void f(klassOop)); | |
| 409 | |
| 410 // For sharing -- fill in a list of known vtable pointers. | |
| 411 static void init_self_patching_vtbl_list(void** list, int count); | |
| 412 | |
| 413 // Debugging | |
| 414 static bool verify_in_progress() { return _verify_in_progress; } | |
| 6008 | 415 static void verify(bool silent = false, |
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416 VerifyOption option = VerifyOption_Default ); |
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417 static int verify_count() { return _verify_count; } |
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418 // The default behavior is to call print_on() on gclog_or_tty. |
| 0 | 419 static void print(); |
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420 // The extended parameter determines which method on the heap will |
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421 // be called: print_on() (extended == false) or print_extended_on() |
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422 // (extended == true). |
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423 static void print_on(outputStream* st, bool extended = false); |
| 0 | 424 static void print_heap_at_SIGBREAK(); |
| 425 static void print_heap_before_gc() { print_heap_before_gc(gclog_or_tty); } | |
| 426 static void print_heap_after_gc() { print_heap_after_gc(gclog_or_tty); } | |
| 4944 | 427 static void print_heap_before_gc(outputStream* st, bool ignore_extended = false); |
| 428 static void print_heap_after_gc(outputStream* st, bool ignore_extended = false); | |
| 0 | 429 |
| 430 // Change the number of dummy objects kept reachable by the full gc dummy | |
| 431 // array; this should trigger relocation in a sliding compaction collector. | |
| 432 debug_only(static bool release_fullgc_alot_dummy();) | |
| 433 // The non-oop pattern (see compiledIC.hpp, etc) | |
| 434 static void* non_oop_word(); | |
| 435 | |
| 436 // Oop verification (see MacroAssembler::verify_oop) | |
| 437 static uintptr_t verify_oop_mask() PRODUCT_RETURN0; | |
| 438 static uintptr_t verify_oop_bits() PRODUCT_RETURN0; | |
| 439 static uintptr_t verify_mark_bits() PRODUCT_RETURN0; | |
| 440 static uintptr_t verify_mark_mask() PRODUCT_RETURN0; | |
| 441 static uintptr_t verify_klass_mask() PRODUCT_RETURN0; | |
| 442 static uintptr_t verify_klass_bits() PRODUCT_RETURN0; | |
| 443 | |
| 444 // Flushing and deoptimization | |
| 445 static void flush_dependents_on(instanceKlassHandle dependee); | |
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446 static void flush_dependents_on(Handle call_site, Handle method_handle); |
| 0 | 447 #ifdef HOTSWAP |
| 448 // Flushing and deoptimization in case of evolution | |
| 449 static void flush_evol_dependents_on(instanceKlassHandle dependee); | |
| 450 #endif // HOTSWAP | |
| 451 // Support for fullspeed debugging | |
| 452 static void flush_dependents_on_method(methodHandle dependee); | |
| 453 | |
| 454 // Compiler support | |
| 455 static int base_vtable_size() { return _base_vtable_size; } | |
| 456 }; | |
| 457 | |
| 458 class DeferredObjAllocEvent : public CHeapObj { | |
| 459 private: | |
| 460 oop _oop; | |
| 461 size_t _bytesize; | |
| 462 jint _arena_id; | |
| 463 | |
| 464 public: | |
| 465 DeferredObjAllocEvent(const oop o, const size_t s, const jint id) { | |
| 466 _oop = o; | |
| 467 _bytesize = s; | |
| 468 _arena_id = id; | |
| 469 } | |
| 470 | |
| 471 ~DeferredObjAllocEvent() { | |
| 472 } | |
| 473 | |
| 474 jint arena_id() { return _arena_id; } | |
| 475 size_t bytesize() { return _bytesize; } | |
| 476 oop get_oop() { return _oop; } | |
| 477 }; | |
| 1972 | 478 |
| 479 #endif // SHARE_VM_MEMORY_UNIVERSE_HPP |