Tue, 12 Dec 2017 10:30:27 +0800
#6345 sync is controled by UseSyncLevel instead of Use3A2000
Reviewed-by: fujie
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #ifndef SHARE_VM_OOPS_KLASS_HPP |
aoqi@0 | 26 | #define SHARE_VM_OOPS_KLASS_HPP |
aoqi@0 | 27 | |
aoqi@0 | 28 | #include "memory/genOopClosures.hpp" |
aoqi@0 | 29 | #include "memory/iterator.hpp" |
aoqi@0 | 30 | #include "memory/memRegion.hpp" |
aoqi@0 | 31 | #include "memory/specialized_oop_closures.hpp" |
aoqi@0 | 32 | #include "oops/klassPS.hpp" |
aoqi@0 | 33 | #include "oops/metadata.hpp" |
aoqi@0 | 34 | #include "oops/oop.hpp" |
aoqi@7535 | 35 | #ifdef MIPS64 |
aoqi@0 | 36 | #include "runtime/orderAccess.hpp" |
aoqi@7535 | 37 | #endif |
aoqi@0 | 38 | #include "trace/traceMacros.hpp" |
aoqi@0 | 39 | #include "utilities/accessFlags.hpp" |
aoqi@0 | 40 | #include "utilities/macros.hpp" |
aoqi@0 | 41 | #if INCLUDE_ALL_GCS |
aoqi@0 | 42 | #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp" |
aoqi@0 | 43 | #include "gc_implementation/g1/g1OopClosures.hpp" |
aoqi@0 | 44 | #include "gc_implementation/parNew/parOopClosures.hpp" |
aoqi@0 | 45 | #endif // INCLUDE_ALL_GCS |
aoqi@0 | 46 | |
aoqi@0 | 47 | // |
aoqi@0 | 48 | // A Klass provides: |
aoqi@0 | 49 | // 1: language level class object (method dictionary etc.) |
aoqi@0 | 50 | // 2: provide vm dispatch behavior for the object |
aoqi@0 | 51 | // Both functions are combined into one C++ class. |
aoqi@0 | 52 | |
aoqi@0 | 53 | // One reason for the oop/klass dichotomy in the implementation is |
aoqi@0 | 54 | // that we don't want a C++ vtbl pointer in every object. Thus, |
aoqi@0 | 55 | // normal oops don't have any virtual functions. Instead, they |
aoqi@0 | 56 | // forward all "virtual" functions to their klass, which does have |
aoqi@0 | 57 | // a vtbl and does the C++ dispatch depending on the object's |
aoqi@0 | 58 | // actual type. (See oop.inline.hpp for some of the forwarding code.) |
aoqi@0 | 59 | // ALL FUNCTIONS IMPLEMENTING THIS DISPATCH ARE PREFIXED WITH "oop_"! |
aoqi@0 | 60 | |
aoqi@0 | 61 | // Klass layout: |
aoqi@0 | 62 | // [C++ vtbl ptr ] (contained in Metadata) |
aoqi@0 | 63 | // [layout_helper ] |
aoqi@0 | 64 | // [super_check_offset ] for fast subtype checks |
aoqi@0 | 65 | // [name ] |
aoqi@0 | 66 | // [secondary_super_cache] for fast subtype checks |
aoqi@0 | 67 | // [secondary_supers ] array of 2ndary supertypes |
aoqi@0 | 68 | // [primary_supers 0] |
aoqi@0 | 69 | // [primary_supers 1] |
aoqi@0 | 70 | // [primary_supers 2] |
aoqi@0 | 71 | // ... |
aoqi@0 | 72 | // [primary_supers 7] |
aoqi@0 | 73 | // [java_mirror ] |
aoqi@0 | 74 | // [super ] |
aoqi@0 | 75 | // [subklass ] first subclass |
aoqi@0 | 76 | // [next_sibling ] link to chain additional subklasses |
aoqi@0 | 77 | // [next_link ] |
aoqi@0 | 78 | // [class_loader_data] |
aoqi@0 | 79 | // [modifier_flags] |
aoqi@0 | 80 | // [access_flags ] |
aoqi@0 | 81 | // [last_biased_lock_bulk_revocation_time] (64 bits) |
aoqi@0 | 82 | // [prototype_header] |
aoqi@0 | 83 | // [biased_lock_revocation_count] |
aoqi@0 | 84 | // [_modified_oops] |
aoqi@0 | 85 | // [_accumulated_modified_oops] |
aoqi@0 | 86 | // [trace_id] |
aoqi@0 | 87 | |
aoqi@0 | 88 | |
aoqi@0 | 89 | // Forward declarations. |
aoqi@0 | 90 | template <class T> class Array; |
aoqi@0 | 91 | template <class T> class GrowableArray; |
aoqi@0 | 92 | class ClassLoaderData; |
aoqi@0 | 93 | class klassVtable; |
aoqi@0 | 94 | class ParCompactionManager; |
aoqi@0 | 95 | class KlassSizeStats; |
aoqi@0 | 96 | class fieldDescriptor; |
aoqi@0 | 97 | |
aoqi@0 | 98 | class Klass : public Metadata { |
aoqi@0 | 99 | friend class VMStructs; |
aoqi@0 | 100 | protected: |
aoqi@0 | 101 | // note: put frequently-used fields together at start of klass structure |
aoqi@0 | 102 | // for better cache behavior (may not make much of a difference but sure won't hurt) |
aoqi@0 | 103 | enum { _primary_super_limit = 8 }; |
aoqi@0 | 104 | |
aoqi@0 | 105 | // The "layout helper" is a combined descriptor of object layout. |
aoqi@0 | 106 | // For klasses which are neither instance nor array, the value is zero. |
aoqi@0 | 107 | // |
aoqi@0 | 108 | // For instances, layout helper is a positive number, the instance size. |
aoqi@0 | 109 | // This size is already passed through align_object_size and scaled to bytes. |
aoqi@0 | 110 | // The low order bit is set if instances of this class cannot be |
aoqi@0 | 111 | // allocated using the fastpath. |
aoqi@0 | 112 | // |
aoqi@0 | 113 | // For arrays, layout helper is a negative number, containing four |
aoqi@0 | 114 | // distinct bytes, as follows: |
aoqi@0 | 115 | // MSB:[tag, hsz, ebt, log2(esz)]:LSB |
aoqi@0 | 116 | // where: |
aoqi@0 | 117 | // tag is 0x80 if the elements are oops, 0xC0 if non-oops |
aoqi@0 | 118 | // hsz is array header size in bytes (i.e., offset of first element) |
aoqi@0 | 119 | // ebt is the BasicType of the elements |
aoqi@0 | 120 | // esz is the element size in bytes |
aoqi@0 | 121 | // This packed word is arranged so as to be quickly unpacked by the |
aoqi@0 | 122 | // various fast paths that use the various subfields. |
aoqi@0 | 123 | // |
aoqi@0 | 124 | // The esz bits can be used directly by a SLL instruction, without masking. |
aoqi@0 | 125 | // |
aoqi@0 | 126 | // Note that the array-kind tag looks like 0x00 for instance klasses, |
aoqi@0 | 127 | // since their length in bytes is always less than 24Mb. |
aoqi@0 | 128 | // |
aoqi@0 | 129 | // Final note: This comes first, immediately after C++ vtable, |
aoqi@0 | 130 | // because it is frequently queried. |
aoqi@0 | 131 | jint _layout_helper; |
aoqi@0 | 132 | |
aoqi@0 | 133 | // The fields _super_check_offset, _secondary_super_cache, _secondary_supers |
aoqi@0 | 134 | // and _primary_supers all help make fast subtype checks. See big discussion |
aoqi@0 | 135 | // in doc/server_compiler/checktype.txt |
aoqi@0 | 136 | // |
aoqi@0 | 137 | // Where to look to observe a supertype (it is &_secondary_super_cache for |
aoqi@0 | 138 | // secondary supers, else is &_primary_supers[depth()]. |
aoqi@0 | 139 | juint _super_check_offset; |
aoqi@0 | 140 | |
aoqi@0 | 141 | // Class name. Instance classes: java/lang/String, etc. Array classes: [I, |
aoqi@0 | 142 | // [Ljava/lang/String;, etc. Set to zero for all other kinds of classes. |
aoqi@0 | 143 | Symbol* _name; |
aoqi@0 | 144 | |
aoqi@0 | 145 | // Cache of last observed secondary supertype |
aoqi@0 | 146 | Klass* _secondary_super_cache; |
aoqi@0 | 147 | // Array of all secondary supertypes |
aoqi@0 | 148 | Array<Klass*>* _secondary_supers; |
aoqi@0 | 149 | // Ordered list of all primary supertypes |
aoqi@0 | 150 | Klass* _primary_supers[_primary_super_limit]; |
aoqi@0 | 151 | // java/lang/Class instance mirroring this class |
aoqi@0 | 152 | oop _java_mirror; |
aoqi@0 | 153 | // Superclass |
aoqi@0 | 154 | Klass* _super; |
aoqi@0 | 155 | // First subclass (NULL if none); _subklass->next_sibling() is next one |
aoqi@0 | 156 | Klass* _subklass; |
aoqi@0 | 157 | // Sibling link (or NULL); links all subklasses of a klass |
aoqi@0 | 158 | Klass* _next_sibling; |
aoqi@0 | 159 | |
aoqi@0 | 160 | // All klasses loaded by a class loader are chained through these links |
aoqi@0 | 161 | Klass* _next_link; |
aoqi@0 | 162 | |
aoqi@0 | 163 | // The VM's representation of the ClassLoader used to load this class. |
aoqi@0 | 164 | // Provide access the corresponding instance java.lang.ClassLoader. |
aoqi@0 | 165 | ClassLoaderData* _class_loader_data; |
aoqi@0 | 166 | |
aoqi@0 | 167 | jint _modifier_flags; // Processed access flags, for use by Class.getModifiers. |
aoqi@0 | 168 | AccessFlags _access_flags; // Access flags. The class/interface distinction is stored here. |
aoqi@0 | 169 | |
aoqi@0 | 170 | // Biased locking implementation and statistics |
aoqi@0 | 171 | // (the 64-bit chunk goes first, to avoid some fragmentation) |
aoqi@0 | 172 | jlong _last_biased_lock_bulk_revocation_time; |
aoqi@0 | 173 | markOop _prototype_header; // Used when biased locking is both enabled and disabled for this type |
aoqi@0 | 174 | jint _biased_lock_revocation_count; |
aoqi@0 | 175 | |
aoqi@0 | 176 | TRACE_DEFINE_KLASS_TRACE_ID; |
aoqi@0 | 177 | |
aoqi@0 | 178 | // Remembered sets support for the oops in the klasses. |
aoqi@0 | 179 | jbyte _modified_oops; // Card Table Equivalent (YC/CMS support) |
aoqi@0 | 180 | jbyte _accumulated_modified_oops; // Mod Union Equivalent (CMS support) |
aoqi@0 | 181 | |
iklam@7089 | 182 | private: |
iklam@7089 | 183 | // This is an index into FileMapHeader::_classpath_entry_table[], to |
iklam@7089 | 184 | // associate this class with the JAR file where it's loaded from during |
iklam@7089 | 185 | // dump time. If a class is not loaded from the shared archive, this field is |
iklam@7089 | 186 | // -1. |
iklam@7089 | 187 | jshort _shared_class_path_index; |
iklam@7089 | 188 | |
iklam@7089 | 189 | friend class SharedClassUtil; |
iklam@7089 | 190 | protected: |
iklam@7089 | 191 | |
aoqi@0 | 192 | // Constructor |
aoqi@0 | 193 | Klass(); |
aoqi@0 | 194 | |
aoqi@0 | 195 | void* operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw(); |
aoqi@0 | 196 | |
aoqi@0 | 197 | public: |
aoqi@0 | 198 | enum MethodLookupMode { normal, skip_overpass, skip_defaults }; |
aoqi@0 | 199 | |
aoqi@0 | 200 | bool is_klass() const volatile { return true; } |
aoqi@0 | 201 | |
aoqi@0 | 202 | // super |
aoqi@0 | 203 | Klass* super() const { return _super; } |
aoqi@0 | 204 | void set_super(Klass* k) { _super = k; } |
aoqi@0 | 205 | |
aoqi@0 | 206 | // initializes _super link, _primary_supers & _secondary_supers arrays |
aoqi@0 | 207 | void initialize_supers(Klass* k, TRAPS); |
aoqi@0 | 208 | void initialize_supers_impl1(Klass* k); |
aoqi@0 | 209 | void initialize_supers_impl2(Klass* k); |
aoqi@0 | 210 | |
aoqi@0 | 211 | // klass-specific helper for initializing _secondary_supers |
aoqi@0 | 212 | virtual GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
aoqi@0 | 213 | |
aoqi@0 | 214 | // java_super is the Java-level super type as specified by Class.getSuperClass. |
aoqi@0 | 215 | virtual Klass* java_super() const { return NULL; } |
aoqi@0 | 216 | |
aoqi@0 | 217 | juint super_check_offset() const { return _super_check_offset; } |
aoqi@0 | 218 | void set_super_check_offset(juint o) { _super_check_offset = o; } |
aoqi@0 | 219 | |
aoqi@0 | 220 | Klass* secondary_super_cache() const { return _secondary_super_cache; } |
aoqi@0 | 221 | void set_secondary_super_cache(Klass* k) { _secondary_super_cache = k; } |
aoqi@0 | 222 | |
aoqi@0 | 223 | Array<Klass*>* secondary_supers() const { return _secondary_supers; } |
aoqi@0 | 224 | void set_secondary_supers(Array<Klass*>* k) { _secondary_supers = k; } |
aoqi@0 | 225 | |
aoqi@0 | 226 | // Return the element of the _super chain of the given depth. |
aoqi@0 | 227 | // If there is no such element, return either NULL or this. |
aoqi@0 | 228 | Klass* primary_super_of_depth(juint i) const { |
aoqi@0 | 229 | assert(i < primary_super_limit(), "oob"); |
aoqi@0 | 230 | Klass* super = _primary_supers[i]; |
aoqi@0 | 231 | assert(super == NULL || super->super_depth() == i, "correct display"); |
aoqi@0 | 232 | return super; |
aoqi@0 | 233 | } |
aoqi@0 | 234 | |
aoqi@0 | 235 | // Can this klass be a primary super? False for interfaces and arrays of |
aoqi@0 | 236 | // interfaces. False also for arrays or classes with long super chains. |
aoqi@0 | 237 | bool can_be_primary_super() const { |
aoqi@0 | 238 | const juint secondary_offset = in_bytes(secondary_super_cache_offset()); |
aoqi@0 | 239 | return super_check_offset() != secondary_offset; |
aoqi@0 | 240 | } |
aoqi@0 | 241 | virtual bool can_be_primary_super_slow() const; |
aoqi@0 | 242 | |
aoqi@0 | 243 | // Returns number of primary supers; may be a number in the inclusive range [0, primary_super_limit]. |
aoqi@0 | 244 | juint super_depth() const { |
aoqi@0 | 245 | if (!can_be_primary_super()) { |
aoqi@0 | 246 | return primary_super_limit(); |
aoqi@0 | 247 | } else { |
aoqi@0 | 248 | juint d = (super_check_offset() - in_bytes(primary_supers_offset())) / sizeof(Klass*); |
aoqi@0 | 249 | assert(d < primary_super_limit(), "oob"); |
aoqi@0 | 250 | assert(_primary_supers[d] == this, "proper init"); |
aoqi@0 | 251 | return d; |
aoqi@0 | 252 | } |
aoqi@0 | 253 | } |
aoqi@0 | 254 | |
aoqi@0 | 255 | // store an oop into a field of a Klass |
aoqi@0 | 256 | void klass_oop_store(oop* p, oop v); |
aoqi@0 | 257 | void klass_oop_store(volatile oop* p, oop v); |
aoqi@0 | 258 | |
aoqi@0 | 259 | // java mirror |
aoqi@0 | 260 | oop java_mirror() const { return _java_mirror; } |
aoqi@0 | 261 | void set_java_mirror(oop m) { klass_oop_store(&_java_mirror, m); } |
aoqi@0 | 262 | |
aoqi@0 | 263 | // modifier flags |
aoqi@0 | 264 | jint modifier_flags() const { return _modifier_flags; } |
aoqi@0 | 265 | void set_modifier_flags(jint flags) { _modifier_flags = flags; } |
aoqi@0 | 266 | |
aoqi@0 | 267 | // size helper |
aoqi@0 | 268 | int layout_helper() const { return _layout_helper; } |
aoqi@0 | 269 | void set_layout_helper(int lh) { _layout_helper = lh; } |
aoqi@0 | 270 | |
aoqi@0 | 271 | // Note: for instances layout_helper() may include padding. |
aoqi@0 | 272 | // Use InstanceKlass::contains_field_offset to classify field offsets. |
aoqi@0 | 273 | |
aoqi@0 | 274 | // sub/superklass links |
aoqi@0 | 275 | InstanceKlass* superklass() const; |
aoqi@0 | 276 | Klass* subklass() const; |
aoqi@0 | 277 | Klass* next_sibling() const; |
aoqi@0 | 278 | void append_to_sibling_list(); // add newly created receiver to superklass' subklass list |
aoqi@0 | 279 | |
aoqi@0 | 280 | void set_next_link(Klass* k) { _next_link = k; } |
aoqi@0 | 281 | Klass* next_link() const { return _next_link; } // The next klass defined by the class loader. |
aoqi@0 | 282 | |
aoqi@0 | 283 | // class loader data |
aoqi@0 | 284 | ClassLoaderData* class_loader_data() const { return _class_loader_data; } |
aoqi@0 | 285 | void set_class_loader_data(ClassLoaderData* loader_data) { _class_loader_data = loader_data; } |
aoqi@0 | 286 | |
aoqi@0 | 287 | // The Klasses are not placed in the Heap, so the Card Table or |
aoqi@0 | 288 | // the Mod Union Table can't be used to mark when klasses have modified oops. |
aoqi@0 | 289 | // The CT and MUT bits saves this information for the individual Klasses. |
aoqi@8019 | 290 | void record_modified_oops() { |
aoqi@8019 | 291 | _modified_oops = 1; |
fujie@135 | 292 | #ifdef MIPS64 |
aoqi@8019 | 293 | if (UseSyncLevel >= 2000) OrderAccess::fence(); |
aoqi@8019 | 294 | #endif |
fujie@135 | 295 | } |
aoqi@8019 | 296 | void clear_modified_oops() { |
aoqi@8019 | 297 | _modified_oops = 0; |
fujie@135 | 298 | #ifdef MIPS64 |
aoqi@8019 | 299 | if (UseSyncLevel >= 2000) OrderAccess::fence(); |
aoqi@8019 | 300 | #endif |
fujie@135 | 301 | } |
aoqi@0 | 302 | bool has_modified_oops() { return _modified_oops == 1; } |
aoqi@0 | 303 | |
aoqi@0 | 304 | void accumulate_modified_oops() { if (has_modified_oops()) _accumulated_modified_oops = 1; } |
aoqi@0 | 305 | void clear_accumulated_modified_oops() { _accumulated_modified_oops = 0; } |
aoqi@0 | 306 | bool has_accumulated_modified_oops() { return _accumulated_modified_oops == 1; } |
aoqi@0 | 307 | |
iklam@7089 | 308 | int shared_classpath_index() const { |
iklam@7089 | 309 | return _shared_class_path_index; |
iklam@7089 | 310 | }; |
iklam@7089 | 311 | |
iklam@7089 | 312 | void set_shared_classpath_index(int index) { |
iklam@7089 | 313 | _shared_class_path_index = index; |
iklam@7089 | 314 | }; |
iklam@7089 | 315 | |
iklam@7089 | 316 | |
aoqi@0 | 317 | protected: // internal accessors |
aoqi@0 | 318 | Klass* subklass_oop() const { return _subklass; } |
aoqi@0 | 319 | Klass* next_sibling_oop() const { return _next_sibling; } |
aoqi@0 | 320 | void set_subklass(Klass* s); |
aoqi@0 | 321 | void set_next_sibling(Klass* s); |
aoqi@0 | 322 | |
aoqi@0 | 323 | public: |
aoqi@0 | 324 | |
aoqi@0 | 325 | // Compiler support |
aoqi@0 | 326 | static ByteSize super_offset() { return in_ByteSize(offset_of(Klass, _super)); } |
aoqi@0 | 327 | static ByteSize super_check_offset_offset() { return in_ByteSize(offset_of(Klass, _super_check_offset)); } |
aoqi@0 | 328 | static ByteSize primary_supers_offset() { return in_ByteSize(offset_of(Klass, _primary_supers)); } |
aoqi@0 | 329 | static ByteSize secondary_super_cache_offset() { return in_ByteSize(offset_of(Klass, _secondary_super_cache)); } |
aoqi@0 | 330 | static ByteSize secondary_supers_offset() { return in_ByteSize(offset_of(Klass, _secondary_supers)); } |
aoqi@0 | 331 | static ByteSize java_mirror_offset() { return in_ByteSize(offset_of(Klass, _java_mirror)); } |
aoqi@0 | 332 | static ByteSize modifier_flags_offset() { return in_ByteSize(offset_of(Klass, _modifier_flags)); } |
aoqi@0 | 333 | static ByteSize layout_helper_offset() { return in_ByteSize(offset_of(Klass, _layout_helper)); } |
aoqi@0 | 334 | static ByteSize access_flags_offset() { return in_ByteSize(offset_of(Klass, _access_flags)); } |
aoqi@0 | 335 | |
aoqi@0 | 336 | // Unpacking layout_helper: |
aoqi@0 | 337 | enum { |
aoqi@0 | 338 | _lh_neutral_value = 0, // neutral non-array non-instance value |
aoqi@0 | 339 | _lh_instance_slow_path_bit = 0x01, |
aoqi@0 | 340 | _lh_log2_element_size_shift = BitsPerByte*0, |
aoqi@0 | 341 | _lh_log2_element_size_mask = BitsPerLong-1, |
aoqi@0 | 342 | _lh_element_type_shift = BitsPerByte*1, |
aoqi@0 | 343 | _lh_element_type_mask = right_n_bits(BitsPerByte), // shifted mask |
aoqi@0 | 344 | _lh_header_size_shift = BitsPerByte*2, |
aoqi@0 | 345 | _lh_header_size_mask = right_n_bits(BitsPerByte), // shifted mask |
aoqi@0 | 346 | _lh_array_tag_bits = 2, |
aoqi@0 | 347 | _lh_array_tag_shift = BitsPerInt - _lh_array_tag_bits, |
aoqi@0 | 348 | _lh_array_tag_type_value = ~0x00, // 0xC0000000 >> 30 |
aoqi@0 | 349 | _lh_array_tag_obj_value = ~0x01 // 0x80000000 >> 30 |
aoqi@0 | 350 | }; |
aoqi@0 | 351 | |
aoqi@0 | 352 | static int layout_helper_size_in_bytes(jint lh) { |
aoqi@0 | 353 | assert(lh > (jint)_lh_neutral_value, "must be instance"); |
aoqi@0 | 354 | return (int) lh & ~_lh_instance_slow_path_bit; |
aoqi@0 | 355 | } |
aoqi@0 | 356 | static bool layout_helper_needs_slow_path(jint lh) { |
aoqi@0 | 357 | assert(lh > (jint)_lh_neutral_value, "must be instance"); |
aoqi@0 | 358 | return (lh & _lh_instance_slow_path_bit) != 0; |
aoqi@0 | 359 | } |
aoqi@0 | 360 | static bool layout_helper_is_instance(jint lh) { |
aoqi@0 | 361 | return (jint)lh > (jint)_lh_neutral_value; |
aoqi@0 | 362 | } |
aoqi@0 | 363 | static bool layout_helper_is_array(jint lh) { |
aoqi@0 | 364 | return (jint)lh < (jint)_lh_neutral_value; |
aoqi@0 | 365 | } |
aoqi@0 | 366 | static bool layout_helper_is_typeArray(jint lh) { |
aoqi@0 | 367 | // _lh_array_tag_type_value == (lh >> _lh_array_tag_shift); |
aoqi@0 | 368 | return (juint)lh >= (juint)(_lh_array_tag_type_value << _lh_array_tag_shift); |
aoqi@0 | 369 | } |
aoqi@0 | 370 | static bool layout_helper_is_objArray(jint lh) { |
aoqi@0 | 371 | // _lh_array_tag_obj_value == (lh >> _lh_array_tag_shift); |
aoqi@0 | 372 | return (jint)lh < (jint)(_lh_array_tag_type_value << _lh_array_tag_shift); |
aoqi@0 | 373 | } |
aoqi@0 | 374 | static int layout_helper_header_size(jint lh) { |
aoqi@0 | 375 | assert(lh < (jint)_lh_neutral_value, "must be array"); |
aoqi@0 | 376 | int hsize = (lh >> _lh_header_size_shift) & _lh_header_size_mask; |
aoqi@0 | 377 | assert(hsize > 0 && hsize < (int)sizeof(oopDesc)*3, "sanity"); |
aoqi@0 | 378 | return hsize; |
aoqi@0 | 379 | } |
aoqi@0 | 380 | static BasicType layout_helper_element_type(jint lh) { |
aoqi@0 | 381 | assert(lh < (jint)_lh_neutral_value, "must be array"); |
aoqi@0 | 382 | int btvalue = (lh >> _lh_element_type_shift) & _lh_element_type_mask; |
aoqi@0 | 383 | assert(btvalue >= T_BOOLEAN && btvalue <= T_OBJECT, "sanity"); |
aoqi@0 | 384 | return (BasicType) btvalue; |
aoqi@0 | 385 | } |
aoqi@0 | 386 | static int layout_helper_log2_element_size(jint lh) { |
aoqi@0 | 387 | assert(lh < (jint)_lh_neutral_value, "must be array"); |
aoqi@0 | 388 | int l2esz = (lh >> _lh_log2_element_size_shift) & _lh_log2_element_size_mask; |
aoqi@0 | 389 | assert(l2esz <= LogBitsPerLong, |
aoqi@0 | 390 | err_msg("sanity. l2esz: 0x%x for lh: 0x%x", (uint)l2esz, (uint)lh)); |
aoqi@0 | 391 | return l2esz; |
aoqi@0 | 392 | } |
aoqi@0 | 393 | static jint array_layout_helper(jint tag, int hsize, BasicType etype, int log2_esize) { |
aoqi@0 | 394 | return (tag << _lh_array_tag_shift) |
aoqi@0 | 395 | | (hsize << _lh_header_size_shift) |
aoqi@0 | 396 | | ((int)etype << _lh_element_type_shift) |
aoqi@0 | 397 | | (log2_esize << _lh_log2_element_size_shift); |
aoqi@0 | 398 | } |
aoqi@0 | 399 | static jint instance_layout_helper(jint size, bool slow_path_flag) { |
aoqi@0 | 400 | return (size << LogHeapWordSize) |
aoqi@0 | 401 | | (slow_path_flag ? _lh_instance_slow_path_bit : 0); |
aoqi@0 | 402 | } |
aoqi@0 | 403 | static int layout_helper_to_size_helper(jint lh) { |
aoqi@0 | 404 | assert(lh > (jint)_lh_neutral_value, "must be instance"); |
aoqi@0 | 405 | // Note that the following expression discards _lh_instance_slow_path_bit. |
aoqi@0 | 406 | return lh >> LogHeapWordSize; |
aoqi@0 | 407 | } |
aoqi@0 | 408 | // Out-of-line version computes everything based on the etype: |
aoqi@0 | 409 | static jint array_layout_helper(BasicType etype); |
aoqi@0 | 410 | |
aoqi@0 | 411 | // What is the maximum number of primary superclasses any klass can have? |
aoqi@0 | 412 | #ifdef PRODUCT |
aoqi@0 | 413 | static juint primary_super_limit() { return _primary_super_limit; } |
aoqi@0 | 414 | #else |
aoqi@0 | 415 | static juint primary_super_limit() { |
aoqi@0 | 416 | assert(FastSuperclassLimit <= _primary_super_limit, "parameter oob"); |
aoqi@0 | 417 | return FastSuperclassLimit; |
aoqi@0 | 418 | } |
aoqi@0 | 419 | #endif |
aoqi@0 | 420 | |
aoqi@0 | 421 | // vtables |
aoqi@0 | 422 | virtual klassVtable* vtable() const { return NULL; } |
aoqi@0 | 423 | virtual int vtable_length() const { return 0; } |
aoqi@0 | 424 | |
aoqi@0 | 425 | // subclass check |
aoqi@0 | 426 | bool is_subclass_of(const Klass* k) const; |
aoqi@0 | 427 | // subtype check: true if is_subclass_of, or if k is interface and receiver implements it |
aoqi@0 | 428 | bool is_subtype_of(Klass* k) const { |
aoqi@0 | 429 | juint off = k->super_check_offset(); |
aoqi@0 | 430 | Klass* sup = *(Klass**)( (address)this + off ); |
aoqi@0 | 431 | const juint secondary_offset = in_bytes(secondary_super_cache_offset()); |
aoqi@0 | 432 | if (sup == k) { |
aoqi@0 | 433 | return true; |
aoqi@0 | 434 | } else if (off != secondary_offset) { |
aoqi@0 | 435 | return false; |
aoqi@0 | 436 | } else { |
aoqi@0 | 437 | return search_secondary_supers(k); |
aoqi@0 | 438 | } |
aoqi@0 | 439 | } |
aoqi@0 | 440 | bool search_secondary_supers(Klass* k) const; |
aoqi@0 | 441 | |
aoqi@0 | 442 | // Find LCA in class hierarchy |
aoqi@0 | 443 | Klass *LCA( Klass *k ); |
aoqi@0 | 444 | |
aoqi@0 | 445 | // Check whether reflection/jni/jvm code is allowed to instantiate this class; |
aoqi@0 | 446 | // if not, throw either an Error or an Exception. |
aoqi@0 | 447 | virtual void check_valid_for_instantiation(bool throwError, TRAPS); |
aoqi@0 | 448 | |
aoqi@0 | 449 | // array copying |
aoqi@0 | 450 | virtual void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); |
aoqi@0 | 451 | |
aoqi@0 | 452 | // tells if the class should be initialized |
aoqi@0 | 453 | virtual bool should_be_initialized() const { return false; } |
aoqi@0 | 454 | // initializes the klass |
aoqi@0 | 455 | virtual void initialize(TRAPS); |
aoqi@0 | 456 | // lookup operation for MethodLookupCache |
aoqi@0 | 457 | friend class MethodLookupCache; |
aoqi@0 | 458 | virtual Klass* find_field(Symbol* name, Symbol* signature, fieldDescriptor* fd) const; |
aoqi@0 | 459 | virtual Method* uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const; |
aoqi@0 | 460 | public: |
aoqi@0 | 461 | Method* lookup_method(Symbol* name, Symbol* signature) const { |
aoqi@0 | 462 | return uncached_lookup_method(name, signature, normal); |
aoqi@0 | 463 | } |
aoqi@0 | 464 | |
aoqi@0 | 465 | // array class with specific rank |
aoqi@0 | 466 | Klass* array_klass(int rank, TRAPS) { return array_klass_impl(false, rank, THREAD); } |
aoqi@0 | 467 | |
aoqi@0 | 468 | // array class with this klass as element type |
aoqi@0 | 469 | Klass* array_klass(TRAPS) { return array_klass_impl(false, THREAD); } |
aoqi@0 | 470 | |
aoqi@0 | 471 | // These will return NULL instead of allocating on the heap: |
aoqi@0 | 472 | // NB: these can block for a mutex, like other functions with TRAPS arg. |
aoqi@0 | 473 | Klass* array_klass_or_null(int rank); |
aoqi@0 | 474 | Klass* array_klass_or_null(); |
aoqi@0 | 475 | |
aoqi@0 | 476 | virtual oop protection_domain() const = 0; |
aoqi@0 | 477 | |
aoqi@0 | 478 | oop class_loader() const; |
aoqi@0 | 479 | |
aoqi@0 | 480 | virtual oop klass_holder() const { return class_loader(); } |
aoqi@0 | 481 | |
aoqi@0 | 482 | protected: |
aoqi@0 | 483 | virtual Klass* array_klass_impl(bool or_null, int rank, TRAPS); |
aoqi@0 | 484 | virtual Klass* array_klass_impl(bool or_null, TRAPS); |
aoqi@0 | 485 | |
aoqi@0 | 486 | public: |
aoqi@0 | 487 | // CDS support - remove and restore oops from metadata. Oops are not shared. |
aoqi@0 | 488 | virtual void remove_unshareable_info(); |
iklam@7089 | 489 | virtual void restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS); |
aoqi@0 | 490 | |
aoqi@0 | 491 | protected: |
aoqi@0 | 492 | // computes the subtype relationship |
aoqi@0 | 493 | virtual bool compute_is_subtype_of(Klass* k); |
aoqi@0 | 494 | public: |
aoqi@0 | 495 | // subclass accessor (here for convenience; undefined for non-klass objects) |
aoqi@0 | 496 | virtual bool is_leaf_class() const { fatal("not a class"); return false; } |
aoqi@0 | 497 | public: |
aoqi@0 | 498 | // ALL FUNCTIONS BELOW THIS POINT ARE DISPATCHED FROM AN OOP |
aoqi@0 | 499 | // These functions describe behavior for the oop not the KLASS. |
aoqi@0 | 500 | |
aoqi@0 | 501 | // actual oop size of obj in memory |
aoqi@0 | 502 | virtual int oop_size(oop obj) const = 0; |
aoqi@0 | 503 | |
aoqi@0 | 504 | // Size of klass in word size. |
aoqi@0 | 505 | virtual int size() const = 0; |
aoqi@0 | 506 | #if INCLUDE_SERVICES |
aoqi@0 | 507 | virtual void collect_statistics(KlassSizeStats *sz) const; |
aoqi@0 | 508 | #endif |
aoqi@0 | 509 | |
aoqi@0 | 510 | // Returns the Java name for a class (Resource allocated) |
aoqi@0 | 511 | // For arrays, this returns the name of the element with a leading '['. |
aoqi@0 | 512 | // For classes, this returns the name with the package separators |
aoqi@0 | 513 | // turned into '.'s. |
aoqi@0 | 514 | const char* external_name() const; |
aoqi@0 | 515 | // Returns the name for a class (Resource allocated) as the class |
aoqi@0 | 516 | // would appear in a signature. |
aoqi@0 | 517 | // For arrays, this returns the name of the element with a leading '['. |
aoqi@0 | 518 | // For classes, this returns the name with a leading 'L' and a trailing ';' |
aoqi@0 | 519 | // and the package separators as '/'. |
aoqi@0 | 520 | virtual const char* signature_name() const; |
aoqi@0 | 521 | |
aoqi@0 | 522 | // garbage collection support |
aoqi@0 | 523 | virtual void oop_follow_contents(oop obj) = 0; |
aoqi@0 | 524 | virtual int oop_adjust_pointers(oop obj) = 0; |
aoqi@0 | 525 | |
aoqi@0 | 526 | // Parallel Scavenge and Parallel Old |
aoqi@0 | 527 | PARALLEL_GC_DECLS_PV |
aoqi@0 | 528 | |
aoqi@0 | 529 | // type testing operations |
aoqi@0 | 530 | protected: |
aoqi@0 | 531 | virtual bool oop_is_instance_slow() const { return false; } |
aoqi@0 | 532 | virtual bool oop_is_array_slow() const { return false; } |
aoqi@0 | 533 | virtual bool oop_is_objArray_slow() const { return false; } |
aoqi@0 | 534 | virtual bool oop_is_typeArray_slow() const { return false; } |
aoqi@0 | 535 | public: |
stefank@6976 | 536 | virtual bool oop_is_instanceClassLoader() const { return false; } |
aoqi@0 | 537 | virtual bool oop_is_instanceMirror() const { return false; } |
aoqi@0 | 538 | virtual bool oop_is_instanceRef() const { return false; } |
aoqi@0 | 539 | |
aoqi@0 | 540 | // Fast non-virtual versions |
aoqi@0 | 541 | #ifndef ASSERT |
aoqi@0 | 542 | #define assert_same_query(xval, xcheck) xval |
aoqi@0 | 543 | #else |
aoqi@0 | 544 | private: |
aoqi@0 | 545 | static bool assert_same_query(bool xval, bool xslow) { |
aoqi@0 | 546 | assert(xval == xslow, "slow and fast queries agree"); |
aoqi@0 | 547 | return xval; |
aoqi@0 | 548 | } |
aoqi@0 | 549 | public: |
aoqi@0 | 550 | #endif |
aoqi@0 | 551 | inline bool oop_is_instance() const { return assert_same_query( |
aoqi@0 | 552 | layout_helper_is_instance(layout_helper()), |
aoqi@0 | 553 | oop_is_instance_slow()); } |
aoqi@0 | 554 | inline bool oop_is_array() const { return assert_same_query( |
aoqi@0 | 555 | layout_helper_is_array(layout_helper()), |
aoqi@0 | 556 | oop_is_array_slow()); } |
aoqi@0 | 557 | inline bool oop_is_objArray() const { return assert_same_query( |
aoqi@0 | 558 | layout_helper_is_objArray(layout_helper()), |
aoqi@0 | 559 | oop_is_objArray_slow()); } |
aoqi@0 | 560 | inline bool oop_is_typeArray() const { return assert_same_query( |
aoqi@0 | 561 | layout_helper_is_typeArray(layout_helper()), |
aoqi@0 | 562 | oop_is_typeArray_slow()); } |
aoqi@0 | 563 | #undef assert_same_query |
aoqi@0 | 564 | |
aoqi@0 | 565 | // Access flags |
aoqi@0 | 566 | AccessFlags access_flags() const { return _access_flags; } |
aoqi@0 | 567 | void set_access_flags(AccessFlags flags) { _access_flags = flags; } |
aoqi@0 | 568 | |
aoqi@0 | 569 | bool is_public() const { return _access_flags.is_public(); } |
aoqi@0 | 570 | bool is_final() const { return _access_flags.is_final(); } |
aoqi@0 | 571 | bool is_interface() const { return _access_flags.is_interface(); } |
aoqi@0 | 572 | bool is_abstract() const { return _access_flags.is_abstract(); } |
aoqi@0 | 573 | bool is_super() const { return _access_flags.is_super(); } |
aoqi@0 | 574 | bool is_synthetic() const { return _access_flags.is_synthetic(); } |
aoqi@0 | 575 | void set_is_synthetic() { _access_flags.set_is_synthetic(); } |
aoqi@0 | 576 | bool has_finalizer() const { return _access_flags.has_finalizer(); } |
aoqi@0 | 577 | bool has_final_method() const { return _access_flags.has_final_method(); } |
aoqi@0 | 578 | void set_has_finalizer() { _access_flags.set_has_finalizer(); } |
aoqi@0 | 579 | void set_has_final_method() { _access_flags.set_has_final_method(); } |
aoqi@0 | 580 | bool is_cloneable() const { return _access_flags.is_cloneable(); } |
aoqi@0 | 581 | void set_is_cloneable() { _access_flags.set_is_cloneable(); } |
aoqi@0 | 582 | bool has_vanilla_constructor() const { return _access_flags.has_vanilla_constructor(); } |
aoqi@0 | 583 | void set_has_vanilla_constructor() { _access_flags.set_has_vanilla_constructor(); } |
aoqi@0 | 584 | bool has_miranda_methods () const { return access_flags().has_miranda_methods(); } |
aoqi@0 | 585 | void set_has_miranda_methods() { _access_flags.set_has_miranda_methods(); } |
aoqi@0 | 586 | |
aoqi@0 | 587 | // Biased locking support |
aoqi@0 | 588 | // Note: the prototype header is always set up to be at least the |
aoqi@0 | 589 | // prototype markOop. If biased locking is enabled it may further be |
aoqi@0 | 590 | // biasable and have an epoch. |
aoqi@0 | 591 | markOop prototype_header() const { return _prototype_header; } |
aoqi@0 | 592 | // NOTE: once instances of this klass are floating around in the |
aoqi@0 | 593 | // system, this header must only be updated at a safepoint. |
aoqi@0 | 594 | // NOTE 2: currently we only ever set the prototype header to the |
aoqi@0 | 595 | // biasable prototype for instanceKlasses. There is no technical |
aoqi@0 | 596 | // reason why it could not be done for arrayKlasses aside from |
aoqi@0 | 597 | // wanting to reduce the initial scope of this optimization. There |
aoqi@0 | 598 | // are potential problems in setting the bias pattern for |
aoqi@0 | 599 | // JVM-internal oops. |
aoqi@0 | 600 | inline void set_prototype_header(markOop header); |
aoqi@0 | 601 | static ByteSize prototype_header_offset() { return in_ByteSize(offset_of(Klass, _prototype_header)); } |
aoqi@0 | 602 | |
aoqi@0 | 603 | int biased_lock_revocation_count() const { return (int) _biased_lock_revocation_count; } |
aoqi@0 | 604 | // Atomically increments biased_lock_revocation_count and returns updated value |
aoqi@0 | 605 | int atomic_incr_biased_lock_revocation_count(); |
aoqi@0 | 606 | void set_biased_lock_revocation_count(int val) { _biased_lock_revocation_count = (jint) val; } |
aoqi@0 | 607 | jlong last_biased_lock_bulk_revocation_time() { return _last_biased_lock_bulk_revocation_time; } |
aoqi@0 | 608 | void set_last_biased_lock_bulk_revocation_time(jlong cur_time) { _last_biased_lock_bulk_revocation_time = cur_time; } |
aoqi@0 | 609 | |
aoqi@0 | 610 | TRACE_DEFINE_KLASS_METHODS; |
aoqi@0 | 611 | |
aoqi@0 | 612 | // garbage collection support |
aoqi@0 | 613 | virtual void oops_do(OopClosure* cl); |
aoqi@0 | 614 | |
aoqi@0 | 615 | // Iff the class loader (or mirror for anonymous classes) is alive the |
aoqi@0 | 616 | // Klass is considered alive. |
aoqi@0 | 617 | // The is_alive closure passed in depends on the Garbage Collector used. |
aoqi@0 | 618 | bool is_loader_alive(BoolObjectClosure* is_alive); |
aoqi@0 | 619 | |
stefank@6992 | 620 | static void clean_weak_klass_links(BoolObjectClosure* is_alive, bool clean_alive_klasses = true); |
stefank@6992 | 621 | static void clean_subklass_tree(BoolObjectClosure* is_alive) { |
stefank@6992 | 622 | clean_weak_klass_links(is_alive, false /* clean_alive_klasses */); |
aoqi@0 | 623 | } |
aoqi@0 | 624 | |
aoqi@0 | 625 | // iterators |
aoqi@0 | 626 | virtual int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) = 0; |
aoqi@0 | 627 | virtual int oop_oop_iterate_v(oop obj, ExtendedOopClosure* blk) { |
aoqi@0 | 628 | return oop_oop_iterate(obj, blk); |
aoqi@0 | 629 | } |
aoqi@0 | 630 | |
aoqi@0 | 631 | #if INCLUDE_ALL_GCS |
aoqi@0 | 632 | // In case we don't have a specialized backward scanner use forward |
aoqi@0 | 633 | // iteration. |
aoqi@0 | 634 | virtual int oop_oop_iterate_backwards_v(oop obj, ExtendedOopClosure* blk) { |
aoqi@0 | 635 | return oop_oop_iterate_v(obj, blk); |
aoqi@0 | 636 | } |
aoqi@0 | 637 | #endif // INCLUDE_ALL_GCS |
aoqi@0 | 638 | |
aoqi@0 | 639 | // Iterates "blk" over all the oops in "obj" (of type "this") within "mr". |
aoqi@0 | 640 | // (I don't see why the _m should be required, but without it the Solaris |
aoqi@0 | 641 | // C++ gives warning messages about overridings of the "oop_oop_iterate" |
aoqi@0 | 642 | // defined above "hiding" this virtual function. (DLD, 6/20/00)) */ |
aoqi@0 | 643 | virtual int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) = 0; |
aoqi@0 | 644 | virtual int oop_oop_iterate_v_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
aoqi@0 | 645 | return oop_oop_iterate_m(obj, blk, mr); |
aoqi@0 | 646 | } |
aoqi@0 | 647 | |
aoqi@0 | 648 | // Versions of the above iterators specialized to particular subtypes |
aoqi@0 | 649 | // of OopClosure, to avoid closure virtual calls. |
aoqi@0 | 650 | #define Klass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
aoqi@0 | 651 | virtual int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk) { \ |
aoqi@0 | 652 | /* Default implementation reverts to general version. */ \ |
aoqi@0 | 653 | return oop_oop_iterate(obj, blk); \ |
aoqi@0 | 654 | } \ |
aoqi@0 | 655 | \ |
aoqi@0 | 656 | /* Iterates "blk" over all the oops in "obj" (of type "this") within "mr". \ |
aoqi@0 | 657 | (I don't see why the _m should be required, but without it the Solaris \ |
aoqi@0 | 658 | C++ gives warning messages about overridings of the "oop_oop_iterate" \ |
aoqi@0 | 659 | defined above "hiding" this virtual function. (DLD, 6/20/00)) */ \ |
aoqi@0 | 660 | virtual int oop_oop_iterate##nv_suffix##_m(oop obj, \ |
aoqi@0 | 661 | OopClosureType* blk, \ |
aoqi@0 | 662 | MemRegion mr) { \ |
aoqi@0 | 663 | return oop_oop_iterate_m(obj, blk, mr); \ |
aoqi@0 | 664 | } |
aoqi@0 | 665 | |
aoqi@0 | 666 | SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_1(Klass_OOP_OOP_ITERATE_DECL) |
aoqi@0 | 667 | SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_2(Klass_OOP_OOP_ITERATE_DECL) |
aoqi@0 | 668 | |
aoqi@0 | 669 | #if INCLUDE_ALL_GCS |
aoqi@0 | 670 | #define Klass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
aoqi@0 | 671 | virtual int oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
aoqi@0 | 672 | OopClosureType* blk) { \ |
aoqi@0 | 673 | /* Default implementation reverts to general version. */ \ |
aoqi@0 | 674 | return oop_oop_iterate_backwards_v(obj, blk); \ |
aoqi@0 | 675 | } |
aoqi@0 | 676 | |
aoqi@0 | 677 | SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_1(Klass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
aoqi@0 | 678 | SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_2(Klass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
aoqi@0 | 679 | #endif // INCLUDE_ALL_GCS |
aoqi@0 | 680 | |
aoqi@0 | 681 | virtual void array_klasses_do(void f(Klass* k)) {} |
aoqi@0 | 682 | |
aoqi@0 | 683 | // Return self, except for abstract classes with exactly 1 |
aoqi@0 | 684 | // implementor. Then return the 1 concrete implementation. |
aoqi@0 | 685 | Klass *up_cast_abstract(); |
aoqi@0 | 686 | |
aoqi@0 | 687 | // klass name |
aoqi@0 | 688 | Symbol* name() const { return _name; } |
aoqi@0 | 689 | void set_name(Symbol* n); |
aoqi@0 | 690 | |
aoqi@0 | 691 | public: |
aoqi@0 | 692 | // jvm support |
aoqi@0 | 693 | virtual jint compute_modifier_flags(TRAPS) const; |
aoqi@0 | 694 | |
aoqi@0 | 695 | // JVMTI support |
aoqi@0 | 696 | virtual jint jvmti_class_status() const; |
aoqi@0 | 697 | |
aoqi@0 | 698 | // Printing |
aoqi@0 | 699 | virtual void print_on(outputStream* st) const; |
aoqi@0 | 700 | |
aoqi@0 | 701 | virtual void oop_print_value_on(oop obj, outputStream* st); |
aoqi@0 | 702 | virtual void oop_print_on (oop obj, outputStream* st); |
aoqi@0 | 703 | |
aoqi@0 | 704 | virtual const char* internal_name() const = 0; |
aoqi@0 | 705 | |
aoqi@0 | 706 | // Verification |
aoqi@0 | 707 | virtual void verify_on(outputStream* st); |
aoqi@0 | 708 | void verify() { verify_on(tty); } |
aoqi@0 | 709 | |
aoqi@0 | 710 | #ifndef PRODUCT |
aoqi@0 | 711 | bool verify_vtable_index(int index); |
aoqi@0 | 712 | bool verify_itable_index(int index); |
aoqi@0 | 713 | #endif |
aoqi@0 | 714 | |
aoqi@0 | 715 | virtual void oop_verify_on(oop obj, outputStream* st); |
aoqi@0 | 716 | |
aoqi@0 | 717 | static bool is_null(narrowKlass obj); |
aoqi@0 | 718 | static bool is_null(Klass* obj); |
aoqi@0 | 719 | |
aoqi@0 | 720 | // klass encoding for klass pointer in objects. |
aoqi@0 | 721 | static narrowKlass encode_klass_not_null(Klass* v); |
aoqi@0 | 722 | static narrowKlass encode_klass(Klass* v); |
aoqi@0 | 723 | |
aoqi@0 | 724 | static Klass* decode_klass_not_null(narrowKlass v); |
aoqi@0 | 725 | static Klass* decode_klass(narrowKlass v); |
aoqi@0 | 726 | |
aoqi@0 | 727 | private: |
aoqi@0 | 728 | // barriers used by klass_oop_store |
aoqi@0 | 729 | void klass_update_barrier_set(oop v); |
stefank@6992 | 730 | void klass_update_barrier_set_pre(oop* p, oop v); |
aoqi@0 | 731 | }; |
aoqi@0 | 732 | |
aoqi@0 | 733 | #endif // SHARE_VM_OOPS_KLASS_HPP |