Mon, 26 Jan 2009 12:47:21 -0800
6786503: Overflow list performance can be improved
Summary: Avoid overflow list walk in CMS & ParNew when it is unnecessary. Fix a couple of correctness issues, including a C-heap leak, in ParNew at the intersection of promotion failure, work queue overflow and object array chunking. Add stress testing option and related assertion checking.
Reviewed-by: jmasa
duke@435 | 1 | /* |
xdono@631 | 2 | * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // Universe is a name space holding known system classes and objects in the VM. |
duke@435 | 26 | // |
duke@435 | 27 | // Loaded classes are accessible through the SystemDictionary. |
duke@435 | 28 | // |
duke@435 | 29 | // The object heap is allocated and accessed through Universe, and various allocation |
duke@435 | 30 | // support is provided. Allocation by the interpreter and compiled code is done inline |
duke@435 | 31 | // and bails out to Scavenge::invoke_and_allocate. |
duke@435 | 32 | |
duke@435 | 33 | class CollectedHeap; |
duke@435 | 34 | class DeferredObjAllocEvent; |
duke@435 | 35 | |
duke@435 | 36 | |
duke@435 | 37 | // Common parts of a methodOop cache. This cache safely interacts with |
duke@435 | 38 | // the RedefineClasses API. |
duke@435 | 39 | // |
duke@435 | 40 | class CommonMethodOopCache : public CHeapObj { |
duke@435 | 41 | // We save the klassOop and the idnum of methodOop in order to get |
duke@435 | 42 | // the current cached methodOop. |
duke@435 | 43 | private: |
duke@435 | 44 | klassOop _klass; |
duke@435 | 45 | int _method_idnum; |
duke@435 | 46 | |
duke@435 | 47 | public: |
duke@435 | 48 | CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; } |
duke@435 | 49 | ~CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; } |
duke@435 | 50 | |
duke@435 | 51 | void init(klassOop k, methodOop m, TRAPS); |
duke@435 | 52 | klassOop klass() const { return _klass; } |
duke@435 | 53 | int method_idnum() const { return _method_idnum; } |
duke@435 | 54 | |
duke@435 | 55 | // GC support |
duke@435 | 56 | void oops_do(OopClosure* f) { f->do_oop((oop*)&_klass); } |
duke@435 | 57 | }; |
duke@435 | 58 | |
duke@435 | 59 | |
duke@435 | 60 | // A helper class for caching a methodOop when the user of the cache |
duke@435 | 61 | // cares about all versions of the methodOop. |
duke@435 | 62 | // |
duke@435 | 63 | class ActiveMethodOopsCache : public CommonMethodOopCache { |
duke@435 | 64 | // This subclass adds weak references to older versions of the |
duke@435 | 65 | // methodOop and a query method for a methodOop. |
duke@435 | 66 | |
duke@435 | 67 | private: |
duke@435 | 68 | // If the cached methodOop has not been redefined, then |
duke@435 | 69 | // _prev_methods will be NULL. If all of the previous |
duke@435 | 70 | // versions of the method have been collected, then |
duke@435 | 71 | // _prev_methods can have a length of zero. |
duke@435 | 72 | GrowableArray<jweak>* _prev_methods; |
duke@435 | 73 | |
duke@435 | 74 | public: |
duke@435 | 75 | ActiveMethodOopsCache() { _prev_methods = NULL; } |
duke@435 | 76 | ~ActiveMethodOopsCache(); |
duke@435 | 77 | |
duke@435 | 78 | void add_previous_version(const methodOop method); |
duke@435 | 79 | bool is_same_method(const methodOop method) const; |
duke@435 | 80 | }; |
duke@435 | 81 | |
duke@435 | 82 | |
duke@435 | 83 | // A helper class for caching a methodOop when the user of the cache |
duke@435 | 84 | // only cares about the latest version of the methodOop. |
duke@435 | 85 | // |
duke@435 | 86 | class LatestMethodOopCache : public CommonMethodOopCache { |
duke@435 | 87 | // This subclass adds a getter method for the latest methodOop. |
duke@435 | 88 | |
duke@435 | 89 | public: |
duke@435 | 90 | methodOop get_methodOop(); |
duke@435 | 91 | }; |
duke@435 | 92 | |
duke@435 | 93 | |
duke@435 | 94 | class Universe: AllStatic { |
jcoomes@916 | 95 | // Ugh. Universe is much too friendly. |
duke@435 | 96 | friend class MarkSweep; |
duke@435 | 97 | friend class oopDesc; |
duke@435 | 98 | friend class ClassLoader; |
duke@435 | 99 | friend class Arguments; |
duke@435 | 100 | friend class SystemDictionary; |
duke@435 | 101 | friend class VMStructs; |
duke@435 | 102 | friend class CompactingPermGenGen; |
duke@435 | 103 | friend class VM_PopulateDumpSharedSpace; |
duke@435 | 104 | |
duke@435 | 105 | friend jint universe_init(); |
duke@435 | 106 | friend void universe2_init(); |
duke@435 | 107 | friend bool universe_post_init(); |
duke@435 | 108 | |
duke@435 | 109 | private: |
duke@435 | 110 | // Known classes in the VM |
duke@435 | 111 | static klassOop _boolArrayKlassObj; |
duke@435 | 112 | static klassOop _byteArrayKlassObj; |
duke@435 | 113 | static klassOop _charArrayKlassObj; |
duke@435 | 114 | static klassOop _intArrayKlassObj; |
duke@435 | 115 | static klassOop _shortArrayKlassObj; |
duke@435 | 116 | static klassOop _longArrayKlassObj; |
duke@435 | 117 | static klassOop _singleArrayKlassObj; |
duke@435 | 118 | static klassOop _doubleArrayKlassObj; |
duke@435 | 119 | static klassOop _typeArrayKlassObjs[T_VOID+1]; |
duke@435 | 120 | |
duke@435 | 121 | static klassOop _objectArrayKlassObj; |
duke@435 | 122 | |
duke@435 | 123 | static klassOop _symbolKlassObj; |
duke@435 | 124 | static klassOop _methodKlassObj; |
duke@435 | 125 | static klassOop _constMethodKlassObj; |
duke@435 | 126 | static klassOop _methodDataKlassObj; |
duke@435 | 127 | static klassOop _klassKlassObj; |
duke@435 | 128 | static klassOop _arrayKlassKlassObj; |
duke@435 | 129 | static klassOop _objArrayKlassKlassObj; |
duke@435 | 130 | static klassOop _typeArrayKlassKlassObj; |
duke@435 | 131 | static klassOop _instanceKlassKlassObj; |
duke@435 | 132 | static klassOop _constantPoolKlassObj; |
duke@435 | 133 | static klassOop _constantPoolCacheKlassObj; |
duke@435 | 134 | static klassOop _compiledICHolderKlassObj; |
duke@435 | 135 | static klassOop _systemObjArrayKlassObj; |
duke@435 | 136 | |
duke@435 | 137 | // Known objects in the VM |
duke@435 | 138 | |
duke@435 | 139 | // Primitive objects |
duke@435 | 140 | static oop _int_mirror; |
duke@435 | 141 | static oop _float_mirror; |
duke@435 | 142 | static oop _double_mirror; |
duke@435 | 143 | static oop _byte_mirror; |
duke@435 | 144 | static oop _bool_mirror; |
duke@435 | 145 | static oop _char_mirror; |
duke@435 | 146 | static oop _long_mirror; |
duke@435 | 147 | static oop _short_mirror; |
duke@435 | 148 | static oop _void_mirror; |
duke@435 | 149 | |
duke@435 | 150 | static oop _main_thread_group; // Reference to the main thread group object |
duke@435 | 151 | static oop _system_thread_group; // Reference to the system thread group object |
duke@435 | 152 | |
duke@435 | 153 | static typeArrayOop _the_empty_byte_array; // Canonicalized byte array |
duke@435 | 154 | static typeArrayOop _the_empty_short_array; // Canonicalized short array |
duke@435 | 155 | static typeArrayOop _the_empty_int_array; // Canonicalized int array |
duke@435 | 156 | static objArrayOop _the_empty_system_obj_array; // Canonicalized system obj array |
duke@435 | 157 | static objArrayOop _the_empty_class_klass_array; // Canonicalized obj array of type java.lang.Class |
duke@435 | 158 | static objArrayOop _the_array_interfaces_array; // Canonicalized 2-array of cloneable & serializable klasses |
duke@435 | 159 | static LatestMethodOopCache* _finalizer_register_cache; // static method for registering finalizable objects |
duke@435 | 160 | static LatestMethodOopCache* _loader_addClass_cache; // method for registering loaded classes in class loader vector |
duke@435 | 161 | static ActiveMethodOopsCache* _reflect_invoke_cache; // method for security checks |
duke@435 | 162 | static oop _out_of_memory_error_java_heap; // preallocated error object (no backtrace) |
duke@435 | 163 | static oop _out_of_memory_error_perm_gen; // preallocated error object (no backtrace) |
duke@435 | 164 | static oop _out_of_memory_error_array_size;// preallocated error object (no backtrace) |
duke@435 | 165 | static oop _out_of_memory_error_gc_overhead_limit; // preallocated error object (no backtrace) |
duke@435 | 166 | |
duke@435 | 167 | // array of preallocated error objects with backtrace |
duke@435 | 168 | static objArrayOop _preallocated_out_of_memory_error_array; |
duke@435 | 169 | |
duke@435 | 170 | // number of preallocated error objects available for use |
duke@435 | 171 | static volatile jint _preallocated_out_of_memory_error_avail_count; |
duke@435 | 172 | |
duke@435 | 173 | static oop _null_ptr_exception_instance; // preallocated exception object |
duke@435 | 174 | static oop _arithmetic_exception_instance; // preallocated exception object |
duke@435 | 175 | static oop _virtual_machine_error_instance; // preallocated exception object |
duke@435 | 176 | // The object used as an exception dummy when exceptions are thrown for |
duke@435 | 177 | // the vm thread. |
duke@435 | 178 | static oop _vm_exception; |
duke@435 | 179 | |
duke@435 | 180 | static oop _emptySymbol; // Canonical empty string ("") symbol |
duke@435 | 181 | |
duke@435 | 182 | // The particular choice of collected heap. |
duke@435 | 183 | static CollectedHeap* _collectedHeap; |
coleenp@548 | 184 | // Base address for oop-within-java-object materialization. |
coleenp@548 | 185 | // NULL if using wide oops. Doubles as heap oop null value. |
coleenp@548 | 186 | static address _heap_base; |
duke@435 | 187 | |
duke@435 | 188 | // array of dummy objects used with +FullGCAlot |
duke@435 | 189 | debug_only(static objArrayOop _fullgc_alot_dummy_array;) |
coleenp@548 | 190 | // index of next entry to clear |
duke@435 | 191 | debug_only(static int _fullgc_alot_dummy_next;) |
duke@435 | 192 | |
duke@435 | 193 | // Compiler/dispatch support |
duke@435 | 194 | static int _base_vtable_size; // Java vtbl size of klass Object (in words) |
duke@435 | 195 | |
duke@435 | 196 | // Initialization |
duke@435 | 197 | static bool _bootstrapping; // true during genesis |
duke@435 | 198 | static bool _fully_initialized; // true after universe_init and initialize_vtables called |
duke@435 | 199 | |
duke@435 | 200 | // the array of preallocated errors with backtraces |
duke@435 | 201 | static objArrayOop preallocated_out_of_memory_errors() { return _preallocated_out_of_memory_error_array; } |
duke@435 | 202 | |
duke@435 | 203 | // generate an out of memory error; if possible using an error with preallocated backtrace; |
duke@435 | 204 | // otherwise return the given default error. |
duke@435 | 205 | static oop gen_out_of_memory_error(oop default_err); |
duke@435 | 206 | |
duke@435 | 207 | // Historic gc information |
duke@435 | 208 | static size_t _heap_capacity_at_last_gc; |
duke@435 | 209 | static size_t _heap_used_at_last_gc; |
duke@435 | 210 | |
duke@435 | 211 | static jint initialize_heap(); |
duke@435 | 212 | static void initialize_basic_type_mirrors(TRAPS); |
duke@435 | 213 | static void fixup_mirrors(TRAPS); |
duke@435 | 214 | |
duke@435 | 215 | static void reinitialize_vtable_of(KlassHandle h_k, TRAPS); |
duke@435 | 216 | static void reinitialize_itables(TRAPS); |
duke@435 | 217 | static void compute_base_vtable_size(); // compute vtable size of class Object |
duke@435 | 218 | |
duke@435 | 219 | static void genesis(TRAPS); // Create the initial world |
duke@435 | 220 | |
duke@435 | 221 | // Mirrors for primitive classes (created eagerly) |
duke@435 | 222 | static oop check_mirror(oop m) { |
duke@435 | 223 | assert(m != NULL, "mirror not initialized"); |
duke@435 | 224 | return m; |
duke@435 | 225 | } |
duke@435 | 226 | |
duke@435 | 227 | // Debugging |
duke@435 | 228 | static int _verify_count; // number of verifies done |
duke@435 | 229 | // True during call to verify(). Should only be set/cleared in verify(). |
duke@435 | 230 | static bool _verify_in_progress; |
duke@435 | 231 | |
duke@435 | 232 | static void compute_verify_oop_data(); |
duke@435 | 233 | |
duke@435 | 234 | public: |
duke@435 | 235 | // Known classes in the VM |
duke@435 | 236 | static klassOop boolArrayKlassObj() { return _boolArrayKlassObj; } |
duke@435 | 237 | static klassOop byteArrayKlassObj() { return _byteArrayKlassObj; } |
duke@435 | 238 | static klassOop charArrayKlassObj() { return _charArrayKlassObj; } |
duke@435 | 239 | static klassOop intArrayKlassObj() { return _intArrayKlassObj; } |
duke@435 | 240 | static klassOop shortArrayKlassObj() { return _shortArrayKlassObj; } |
duke@435 | 241 | static klassOop longArrayKlassObj() { return _longArrayKlassObj; } |
duke@435 | 242 | static klassOop singleArrayKlassObj() { return _singleArrayKlassObj; } |
duke@435 | 243 | static klassOop doubleArrayKlassObj() { return _doubleArrayKlassObj; } |
duke@435 | 244 | |
duke@435 | 245 | static klassOop objectArrayKlassObj() { |
duke@435 | 246 | return _objectArrayKlassObj; |
duke@435 | 247 | } |
duke@435 | 248 | |
duke@435 | 249 | static klassOop typeArrayKlassObj(BasicType t) { |
duke@435 | 250 | assert((uint)t < T_VOID+1, "range check"); |
duke@435 | 251 | assert(_typeArrayKlassObjs[t] != NULL, "domain check"); |
duke@435 | 252 | return _typeArrayKlassObjs[t]; |
duke@435 | 253 | } |
duke@435 | 254 | |
duke@435 | 255 | static klassOop symbolKlassObj() { return _symbolKlassObj; } |
duke@435 | 256 | static klassOop methodKlassObj() { return _methodKlassObj; } |
duke@435 | 257 | static klassOop constMethodKlassObj() { return _constMethodKlassObj; } |
duke@435 | 258 | static klassOop methodDataKlassObj() { return _methodDataKlassObj; } |
duke@435 | 259 | static klassOop klassKlassObj() { return _klassKlassObj; } |
duke@435 | 260 | static klassOop arrayKlassKlassObj() { return _arrayKlassKlassObj; } |
duke@435 | 261 | static klassOop objArrayKlassKlassObj() { return _objArrayKlassKlassObj; } |
duke@435 | 262 | static klassOop typeArrayKlassKlassObj() { return _typeArrayKlassKlassObj; } |
duke@435 | 263 | static klassOop instanceKlassKlassObj() { return _instanceKlassKlassObj; } |
duke@435 | 264 | static klassOop constantPoolKlassObj() { return _constantPoolKlassObj; } |
duke@435 | 265 | static klassOop constantPoolCacheKlassObj() { return _constantPoolCacheKlassObj; } |
duke@435 | 266 | static klassOop compiledICHolderKlassObj() { return _compiledICHolderKlassObj; } |
duke@435 | 267 | static klassOop systemObjArrayKlassObj() { return _systemObjArrayKlassObj; } |
duke@435 | 268 | |
duke@435 | 269 | // Known objects in tbe VM |
duke@435 | 270 | static oop int_mirror() { return check_mirror(_int_mirror); |
duke@435 | 271 | } |
duke@435 | 272 | static oop float_mirror() { return check_mirror(_float_mirror); } |
duke@435 | 273 | static oop double_mirror() { return check_mirror(_double_mirror); } |
duke@435 | 274 | static oop byte_mirror() { return check_mirror(_byte_mirror); } |
duke@435 | 275 | static oop bool_mirror() { return check_mirror(_bool_mirror); } |
duke@435 | 276 | static oop char_mirror() { return check_mirror(_char_mirror); } |
duke@435 | 277 | static oop long_mirror() { return check_mirror(_long_mirror); } |
duke@435 | 278 | static oop short_mirror() { return check_mirror(_short_mirror); } |
duke@435 | 279 | static oop void_mirror() { return check_mirror(_void_mirror); } |
duke@435 | 280 | |
duke@435 | 281 | // table of same |
duke@435 | 282 | static oop _mirrors[T_VOID+1]; |
duke@435 | 283 | |
duke@435 | 284 | static oop java_mirror(BasicType t) { |
duke@435 | 285 | assert((uint)t < T_VOID+1, "range check"); |
duke@435 | 286 | return check_mirror(_mirrors[t]); |
duke@435 | 287 | } |
duke@435 | 288 | static oop main_thread_group() { return _main_thread_group; } |
duke@435 | 289 | static void set_main_thread_group(oop group) { _main_thread_group = group;} |
duke@435 | 290 | |
duke@435 | 291 | static oop system_thread_group() { return _system_thread_group; } |
duke@435 | 292 | static void set_system_thread_group(oop group) { _system_thread_group = group;} |
duke@435 | 293 | |
duke@435 | 294 | static typeArrayOop the_empty_byte_array() { return _the_empty_byte_array; } |
duke@435 | 295 | static typeArrayOop the_empty_short_array() { return _the_empty_short_array; } |
duke@435 | 296 | static typeArrayOop the_empty_int_array() { return _the_empty_int_array; } |
duke@435 | 297 | static objArrayOop the_empty_system_obj_array () { return _the_empty_system_obj_array; } |
duke@435 | 298 | static objArrayOop the_empty_class_klass_array () { return _the_empty_class_klass_array; } |
duke@435 | 299 | static objArrayOop the_array_interfaces_array() { return _the_array_interfaces_array; } |
duke@435 | 300 | static methodOop finalizer_register_method() { return _finalizer_register_cache->get_methodOop(); } |
duke@435 | 301 | static methodOop loader_addClass_method() { return _loader_addClass_cache->get_methodOop(); } |
duke@435 | 302 | static ActiveMethodOopsCache* reflect_invoke_cache() { return _reflect_invoke_cache; } |
duke@435 | 303 | static oop null_ptr_exception_instance() { return _null_ptr_exception_instance; } |
duke@435 | 304 | static oop arithmetic_exception_instance() { return _arithmetic_exception_instance; } |
duke@435 | 305 | static oop virtual_machine_error_instance() { return _virtual_machine_error_instance; } |
duke@435 | 306 | static oop vm_exception() { return _vm_exception; } |
duke@435 | 307 | static oop emptySymbol() { return _emptySymbol; } |
duke@435 | 308 | |
duke@435 | 309 | // OutOfMemoryError support. Returns an error with the required message. The returned error |
duke@435 | 310 | // may or may not have a backtrace. If error has a backtrace then the stack trace is already |
duke@435 | 311 | // filled in. |
duke@435 | 312 | static oop out_of_memory_error_java_heap() { return gen_out_of_memory_error(_out_of_memory_error_java_heap); } |
duke@435 | 313 | static oop out_of_memory_error_perm_gen() { return gen_out_of_memory_error(_out_of_memory_error_perm_gen); } |
duke@435 | 314 | static oop out_of_memory_error_array_size() { return gen_out_of_memory_error(_out_of_memory_error_array_size); } |
duke@435 | 315 | static oop out_of_memory_error_gc_overhead_limit() { return gen_out_of_memory_error(_out_of_memory_error_gc_overhead_limit); } |
duke@435 | 316 | |
duke@435 | 317 | // Accessors needed for fast allocation |
duke@435 | 318 | static klassOop* boolArrayKlassObj_addr() { return &_boolArrayKlassObj; } |
duke@435 | 319 | static klassOop* byteArrayKlassObj_addr() { return &_byteArrayKlassObj; } |
duke@435 | 320 | static klassOop* charArrayKlassObj_addr() { return &_charArrayKlassObj; } |
duke@435 | 321 | static klassOop* intArrayKlassObj_addr() { return &_intArrayKlassObj; } |
duke@435 | 322 | static klassOop* shortArrayKlassObj_addr() { return &_shortArrayKlassObj; } |
duke@435 | 323 | static klassOop* longArrayKlassObj_addr() { return &_longArrayKlassObj; } |
duke@435 | 324 | static klassOop* singleArrayKlassObj_addr() { return &_singleArrayKlassObj; } |
duke@435 | 325 | static klassOop* doubleArrayKlassObj_addr() { return &_doubleArrayKlassObj; } |
duke@435 | 326 | |
duke@435 | 327 | // The particular choice of collected heap. |
duke@435 | 328 | static CollectedHeap* heap() { return _collectedHeap; } |
duke@435 | 329 | |
coleenp@548 | 330 | // For UseCompressedOops |
coleenp@548 | 331 | static address heap_base() { return _heap_base; } |
coleenp@548 | 332 | static address* heap_base_addr() { return &_heap_base; } |
coleenp@548 | 333 | |
duke@435 | 334 | // Historic gc information |
duke@435 | 335 | static size_t get_heap_capacity_at_last_gc() { return _heap_capacity_at_last_gc; } |
duke@435 | 336 | static size_t get_heap_free_at_last_gc() { return _heap_capacity_at_last_gc - _heap_used_at_last_gc; } |
duke@435 | 337 | static size_t get_heap_used_at_last_gc() { return _heap_used_at_last_gc; } |
duke@435 | 338 | static void update_heap_info_at_gc(); |
duke@435 | 339 | |
duke@435 | 340 | // Testers |
duke@435 | 341 | static bool is_bootstrapping() { return _bootstrapping; } |
duke@435 | 342 | static bool is_fully_initialized() { return _fully_initialized; } |
duke@435 | 343 | |
duke@435 | 344 | static inline bool element_type_should_be_aligned(BasicType type); |
duke@435 | 345 | static inline bool field_type_should_be_aligned(BasicType type); |
duke@435 | 346 | static bool on_page_boundary(void* addr); |
duke@435 | 347 | static bool should_fill_in_stack_trace(Handle throwable); |
duke@435 | 348 | static void check_alignment(uintx size, uintx alignment, const char* name); |
duke@435 | 349 | |
duke@435 | 350 | // Finalizer support. |
duke@435 | 351 | static void run_finalizers_on_exit(); |
duke@435 | 352 | |
duke@435 | 353 | // Iteration |
duke@435 | 354 | |
duke@435 | 355 | // Apply "f" to the addresses of all the direct heap pointers maintained |
duke@435 | 356 | // as static fields of "Universe". |
duke@435 | 357 | static void oops_do(OopClosure* f, bool do_all = false); |
duke@435 | 358 | |
duke@435 | 359 | // Apply "f" to all klasses for basic types (classes not present in |
duke@435 | 360 | // SystemDictionary). |
duke@435 | 361 | static void basic_type_classes_do(void f(klassOop)); |
duke@435 | 362 | |
duke@435 | 363 | // Apply "f" to all system klasses (classes not present in SystemDictionary). |
duke@435 | 364 | static void system_classes_do(void f(klassOop)); |
duke@435 | 365 | |
duke@435 | 366 | // For sharing -- fill in a list of known vtable pointers. |
duke@435 | 367 | static void init_self_patching_vtbl_list(void** list, int count); |
duke@435 | 368 | |
duke@435 | 369 | // Debugging |
duke@435 | 370 | static bool verify_in_progress() { return _verify_in_progress; } |
duke@435 | 371 | static void verify(bool allow_dirty = true, bool silent = false); |
duke@435 | 372 | static int verify_count() { return _verify_count; } |
duke@435 | 373 | static void print(); |
duke@435 | 374 | static void print_on(outputStream* st); |
duke@435 | 375 | static void print_heap_at_SIGBREAK(); |
duke@435 | 376 | static void print_heap_before_gc() { print_heap_before_gc(gclog_or_tty); } |
duke@435 | 377 | static void print_heap_after_gc() { print_heap_after_gc(gclog_or_tty); } |
duke@435 | 378 | static void print_heap_before_gc(outputStream* st); |
duke@435 | 379 | static void print_heap_after_gc(outputStream* st); |
duke@435 | 380 | |
duke@435 | 381 | // Change the number of dummy objects kept reachable by the full gc dummy |
duke@435 | 382 | // array; this should trigger relocation in a sliding compaction collector. |
duke@435 | 383 | debug_only(static bool release_fullgc_alot_dummy();) |
duke@435 | 384 | // The non-oop pattern (see compiledIC.hpp, etc) |
duke@435 | 385 | static void* non_oop_word(); |
duke@435 | 386 | |
duke@435 | 387 | // Oop verification (see MacroAssembler::verify_oop) |
duke@435 | 388 | static uintptr_t verify_oop_mask() PRODUCT_RETURN0; |
duke@435 | 389 | static uintptr_t verify_oop_bits() PRODUCT_RETURN0; |
duke@435 | 390 | static uintptr_t verify_mark_bits() PRODUCT_RETURN0; |
duke@435 | 391 | static uintptr_t verify_mark_mask() PRODUCT_RETURN0; |
duke@435 | 392 | static uintptr_t verify_klass_mask() PRODUCT_RETURN0; |
duke@435 | 393 | static uintptr_t verify_klass_bits() PRODUCT_RETURN0; |
duke@435 | 394 | |
duke@435 | 395 | // Flushing and deoptimization |
duke@435 | 396 | static void flush_dependents_on(instanceKlassHandle dependee); |
duke@435 | 397 | #ifdef HOTSWAP |
duke@435 | 398 | // Flushing and deoptimization in case of evolution |
duke@435 | 399 | static void flush_evol_dependents_on(instanceKlassHandle dependee); |
duke@435 | 400 | #endif // HOTSWAP |
duke@435 | 401 | // Support for fullspeed debugging |
duke@435 | 402 | static void flush_dependents_on_method(methodHandle dependee); |
duke@435 | 403 | |
duke@435 | 404 | // Compiler support |
duke@435 | 405 | static int base_vtable_size() { return _base_vtable_size; } |
duke@435 | 406 | }; |
duke@435 | 407 | |
duke@435 | 408 | class DeferredObjAllocEvent : public CHeapObj { |
duke@435 | 409 | private: |
duke@435 | 410 | oop _oop; |
duke@435 | 411 | size_t _bytesize; |
duke@435 | 412 | jint _arena_id; |
duke@435 | 413 | |
duke@435 | 414 | public: |
duke@435 | 415 | DeferredObjAllocEvent(const oop o, const size_t s, const jint id) { |
duke@435 | 416 | _oop = o; |
duke@435 | 417 | _bytesize = s; |
duke@435 | 418 | _arena_id = id; |
duke@435 | 419 | } |
duke@435 | 420 | |
duke@435 | 421 | ~DeferredObjAllocEvent() { |
duke@435 | 422 | } |
duke@435 | 423 | |
duke@435 | 424 | jint arena_id() { return _arena_id; } |
duke@435 | 425 | size_t bytesize() { return _bytesize; } |
duke@435 | 426 | oop get_oop() { return _oop; } |
duke@435 | 427 | }; |