src/share/vm/oops/instanceKlass.hpp

Fri, 16 Nov 2012 09:19:12 -0500

author
coleenp
date
Fri, 16 Nov 2012 09:19:12 -0500
changeset 4280
80e866b1d053
parent 4267
bd7a7ce2e264
child 4345
30866cd626b0
child 4400
ecd24264898b
permissions
-rw-r--r--

Merge

duke@435 1 /*
jiangli@3701 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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 *
trims@1907 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907 20 * or visit www.oracle.com if you need additional information or have any
trims@1907 21 * questions.
duke@435 22 *
duke@435 23 */
duke@435 24
stefank@2314 25 #ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP
stefank@2314 26 #define SHARE_VM_OOPS_INSTANCEKLASS_HPP
stefank@2314 27
coleenp@4037 28 #include "classfile/classLoaderData.hpp"
coleenp@4037 29 #include "oops/annotations.hpp"
coleenp@4037 30 #include "oops/constMethod.hpp"
never@3137 31 #include "oops/fieldInfo.hpp"
stefank@2314 32 #include "oops/instanceOop.hpp"
stefank@2314 33 #include "oops/klassVtable.hpp"
stefank@2314 34 #include "runtime/handles.hpp"
stefank@2314 35 #include "runtime/os.hpp"
stefank@2314 36 #include "utilities/accessFlags.hpp"
stefank@2314 37 #include "utilities/bitMap.inline.hpp"
stefank@2314 38
coleenp@4037 39 // An InstanceKlass is the VM level representation of a Java class.
duke@435 40 // It contains all information needed for at class at execution runtime.
duke@435 41
coleenp@4037 42 // InstanceKlass layout:
duke@435 43 // [C++ vtbl pointer ] Klass
duke@435 44 // [subtype cache ] Klass
duke@435 45 // [instance size ] Klass
duke@435 46 // [java mirror ] Klass
duke@435 47 // [super ] Klass
duke@435 48 // [access_flags ] Klass
duke@435 49 // [name ] Klass
duke@435 50 // [first subklass ] Klass
duke@435 51 // [next sibling ] Klass
duke@435 52 // [array klasses ]
duke@435 53 // [methods ]
duke@435 54 // [local interfaces ]
duke@435 55 // [transitive interfaces ]
duke@435 56 // [fields ]
duke@435 57 // [constants ]
duke@435 58 // [class loader ]
duke@435 59 // [protection domain ]
duke@435 60 // [signers ]
duke@435 61 // [source file name ]
duke@435 62 // [inner classes ]
duke@435 63 // [static field size ]
duke@435 64 // [nonstatic field size ]
duke@435 65 // [static oop fields size ]
duke@435 66 // [nonstatic oop maps size ]
duke@435 67 // [has finalize method ]
duke@435 68 // [deoptimization mark bit ]
duke@435 69 // [initialization state ]
duke@435 70 // [initializing thread ]
duke@435 71 // [Java vtable length ]
duke@435 72 // [oop map cache (stack maps) ]
duke@435 73 // [EMBEDDED Java vtable ] size in words = vtable_len
duke@435 74 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size
jiangli@3701 75 // The embedded nonstatic oop-map blocks are short pairs (offset, length)
jiangli@3701 76 // indicating where oops are located in instances of this klass.
jiangli@3701 77 // [EMBEDDED implementor of the interface] only exist for interface
jiangli@3741 78 // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled)
duke@435 79
duke@435 80
duke@435 81 // forward declaration for class -- see below for definition
duke@435 82 class SuperTypeClosure;
duke@435 83 class JNIid;
duke@435 84 class jniIdMapBase;
duke@435 85 class BreakpointInfo;
duke@435 86 class fieldDescriptor;
duke@435 87 class DepChange;
duke@435 88 class nmethodBucket;
duke@435 89 class PreviousVersionNode;
duke@435 90 class JvmtiCachedClassFieldMap;
duke@435 91
duke@435 92 // This is used in iterators below.
duke@435 93 class FieldClosure: public StackObj {
duke@435 94 public:
duke@435 95 virtual void do_field(fieldDescriptor* fd) = 0;
duke@435 96 };
duke@435 97
duke@435 98 #ifndef PRODUCT
duke@435 99 // Print fields.
duke@435 100 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields.
duke@435 101 class FieldPrinter: public FieldClosure {
duke@435 102 oop _obj;
duke@435 103 outputStream* _st;
duke@435 104 public:
duke@435 105 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {}
duke@435 106 void do_field(fieldDescriptor* fd);
duke@435 107 };
duke@435 108 #endif // !PRODUCT
duke@435 109
jcoomes@1373 110 // ValueObjs embedded in klass. Describes where oops are located in instances of
jcoomes@1373 111 // this klass.
jcoomes@1373 112 class OopMapBlock VALUE_OBJ_CLASS_SPEC {
jcoomes@1373 113 public:
jcoomes@1373 114 // Byte offset of the first oop mapped by this block.
jcoomes@1374 115 int offset() const { return _offset; }
jcoomes@1374 116 void set_offset(int offset) { _offset = offset; }
jcoomes@1373 117
jcoomes@1373 118 // Number of oops in this block.
jcoomes@1374 119 uint count() const { return _count; }
jcoomes@1374 120 void set_count(uint count) { _count = count; }
jcoomes@1373 121
jcoomes@1373 122 // sizeof(OopMapBlock) in HeapWords.
jcoomes@1373 123 static const int size_in_words() {
jcoomes@1373 124 return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >>
jcoomes@1373 125 LogHeapWordSize;
jcoomes@1373 126 }
jcoomes@1373 127
jcoomes@1373 128 private:
jcoomes@1374 129 int _offset;
jcoomes@1374 130 uint _count;
jcoomes@1373 131 };
jcoomes@1373 132
coleenp@4037 133 class InstanceKlass: public Klass {
duke@435 134 friend class VMStructs;
coleenp@4037 135 friend class ClassFileParser;
minqi@4267 136 friend class CompileReplay;
coleenp@4037 137
coleenp@4037 138 protected:
coleenp@4037 139 // Constructor
coleenp@4037 140 InstanceKlass(int vtable_len,
coleenp@4037 141 int itable_len,
coleenp@4037 142 int static_field_size,
coleenp@4037 143 int nonstatic_oop_map_size,
coleenp@4037 144 ReferenceType rt,
coleenp@4037 145 AccessFlags access_flags,
coleenp@4037 146 bool is_anonymous);
duke@435 147 public:
coleenp@4037 148 static Klass* allocate_instance_klass(ClassLoaderData* loader_data,
coleenp@4037 149 int vtable_len,
coleenp@4037 150 int itable_len,
coleenp@4037 151 int static_field_size,
coleenp@4037 152 int nonstatic_oop_map_size,
coleenp@4037 153 ReferenceType rt,
coleenp@4037 154 AccessFlags access_flags,
coleenp@4037 155 Symbol* name,
coleenp@4037 156 Klass* super_klass,
coleenp@4037 157 KlassHandle host_klass,
coleenp@4037 158 TRAPS);
coleenp@4037 159
coleenp@4037 160 InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
coleenp@4037 161
duke@435 162 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description
duke@435 163 // of the class loading & initialization procedure, and the use of the states.
duke@435 164 enum ClassState {
duke@435 165 allocated, // allocated (but not yet linked)
duke@435 166 loaded, // loaded and inserted in class hierarchy (but not linked yet)
duke@435 167 linked, // successfully linked/verified (but not initialized yet)
duke@435 168 being_initialized, // currently running class initializer
duke@435 169 fully_initialized, // initialized (successfull final state)
duke@435 170 initialization_error // error happened during initialization
duke@435 171 };
duke@435 172
duke@435 173 protected:
duke@435 174 // Protection domain.
duke@435 175 oop _protection_domain;
duke@435 176 // Class signers.
duke@435 177 objArrayOop _signers;
coleenp@4037 178 // Initialization lock. Must be one per class and it has to be a VM internal
coleenp@4037 179 // object so java code cannot lock it (like the mirror)
coleenp@4037 180 // It has to be an object not a Mutex because it's held through java calls.
coleenp@4037 181 volatile oop _init_lock;
coleenp@4037 182
coleenp@4037 183 // Annotations for this class
coleenp@4037 184 Annotations* _annotations;
coleenp@4037 185 // Array classes holding elements of this class.
coleenp@4037 186 Klass* _array_klasses;
coleenp@4037 187 // Constant pool for this class.
coleenp@4037 188 ConstantPool* _constants;
jiangli@3670 189 // The InnerClasses attribute and EnclosingMethod attribute. The
jiangli@3670 190 // _inner_classes is an array of shorts. If the class has InnerClasses
jiangli@3670 191 // attribute, then the _inner_classes array begins with 4-tuples of shorts
jiangli@3670 192 // [inner_class_info_index, outer_class_info_index,
jiangli@3670 193 // inner_name_index, inner_class_access_flags] for the InnerClasses
jiangli@3670 194 // attribute. If the EnclosingMethod attribute exists, it occupies the
jiangli@3670 195 // last two shorts [class_index, method_index] of the array. If only
jiangli@3670 196 // the InnerClasses attribute exists, the _inner_classes array length is
jiangli@3670 197 // number_of_inner_classes * 4. If the class has both InnerClasses
jiangli@3670 198 // and EnclosingMethod attributes the _inner_classes array length is
jiangli@3670 199 // number_of_inner_classes * 4 + enclosing_method_attribute_size.
coleenp@4037 200 Array<jushort>* _inner_classes;
duke@435 201
coleenp@2497 202 // Name of source file containing this klass, NULL if not specified.
coleenp@2497 203 Symbol* _source_file_name;
coleenp@2497 204 // the source debug extension for this klass, NULL if not specified.
fparain@3906 205 // Specified as UTF-8 string without terminating zero byte in the classfile,
fparain@3906 206 // it is stored in the instanceklass as a NULL-terminated UTF-8 string
fparain@3906 207 char* _source_debug_extension;
coleenp@2497 208 // Generic signature, or null if none.
coleenp@2497 209 Symbol* _generic_signature;
coleenp@2497 210 // Array name derived from this class which needs unreferencing
coleenp@2497 211 // if this class is unloaded.
coleenp@2497 212 Symbol* _array_name;
coleenp@2497 213
kvn@600 214 // Number of heapOopSize words used by non-static fields in this klass
kvn@600 215 // (including inherited fields but after header_size()).
coleenp@548 216 int _nonstatic_field_size;
coleenp@548 217 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass
jiangli@3373 218 u2 _static_oop_field_count;// number of static oop fields in this klass
jiangli@3373 219 u2 _java_fields_count; // The number of declared Java fields
jcoomes@1373 220 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks
coleenp@3366 221
dcubed@3401 222 bool _is_marked_dependent; // used for marking during flushing and deoptimization
jiangli@3741 223 enum {
jiangli@3741 224 _misc_rewritten = 1 << 0, // methods rewritten.
jiangli@3741 225 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops
jiangli@3741 226 _misc_should_verify_class = 1 << 2, // allow caching of preverification
jiangli@3741 227 _misc_is_anonymous = 1 << 3 // has embedded _inner_classes field
jiangli@3741 228 };
jiangli@3741 229 u2 _misc_flags;
duke@435 230 u2 _minor_version; // minor version number of class file
duke@435 231 u2 _major_version; // major version number of class file
duke@435 232 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization)
duke@435 233 int _vtable_len; // length of Java vtable (in words)
duke@435 234 int _itable_len; // length of Java itable (in words)
duke@435 235 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily)
duke@435 236 JNIid* _jni_ids; // First JNI identifier for static fields in this class
duke@435 237 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none
duke@435 238 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL
duke@435 239 nmethodBucket* _dependencies; // list of dependent nmethods
duke@435 240 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class
coleenp@4037 241 BreakpointInfo* _breakpoints; // bpt lists, managed by Method*
duke@435 242 // Array of interesting part(s) of the previous version(s) of this
coleenp@4037 243 // InstanceKlass. See PreviousVersionWalker below.
duke@435 244 GrowableArray<PreviousVersionNode *>* _previous_versions;
duke@435 245 // JVMTI fields can be moved to their own structure - see 6315920
duke@435 246 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH
duke@435 247 jint _cached_class_file_len; // JVMTI: length of above
duke@435 248 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration
kamg@4245 249
kamg@4245 250 // true if class, superclass, or implemented interfaces have default methods
kamg@4245 251 bool _has_default_methods;
kamg@4245 252
duke@435 253 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change
coleenp@4037 254 // Method array.
coleenp@4037 255 Array<Method*>* _methods;
coleenp@4037 256 // Interface (Klass*s) this class declares locally to implement.
coleenp@4037 257 Array<Klass*>* _local_interfaces;
coleenp@4037 258 // Interface (Klass*s) this class implements transitively.
coleenp@4037 259 Array<Klass*>* _transitive_interfaces;
coleenp@4037 260 // Int array containing the original order of method in the class file (for JVMTI).
coleenp@4037 261 Array<int>* _method_ordering;
coleenp@4037 262 // Instance and static variable information, starts with 6-tuples of shorts
coleenp@4037 263 // [access, name index, sig index, initval index, low_offset, high_offset]
coleenp@4037 264 // for all fields, followed by the generic signature data at the end of
coleenp@4037 265 // the array. Only fields with generic signature attributes have the generic
coleenp@4037 266 // signature data set in the array. The fields array looks like following:
coleenp@4037 267 //
coleenp@4037 268 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
coleenp@4037 269 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
coleenp@4037 270 // ...
coleenp@4037 271 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
coleenp@4037 272 // [generic signature index]
coleenp@4037 273 // [generic signature index]
coleenp@4037 274 // ...
coleenp@4037 275 Array<u2>* _fields;
duke@435 276
coleenp@3368 277 // Class states are defined as ClassState (see above).
coleenp@3368 278 // Place the _init_state here to utilize the unused 2-byte after
coleenp@3368 279 // _idnum_allocated_count.
coleenp@3368 280 u1 _init_state; // state of class
coleenp@3368 281
jiangli@3526 282 u1 _reference_type; // reference type
jiangli@3526 283
duke@435 284 // embedded Java vtable follows here
duke@435 285 // embedded Java itables follows here
duke@435 286 // embedded static fields follows here
duke@435 287 // embedded nonstatic oop-map blocks follows here
jiangli@3701 288 // embedded implementor of this interface follows here
jiangli@3701 289 // The embedded implementor only exists if the current klass is an
jiangli@3701 290 // iterface. The possible values of the implementor fall into following
jiangli@3701 291 // three cases:
jiangli@3701 292 // NULL: no implementor.
coleenp@4037 293 // A Klass* that's not itself: one implementor.
jiangli@3701 294 // Itsef: more than one implementors.
jiangli@3741 295 // embedded host klass follows here
jiangli@3741 296 // The embedded host klass only exists in an anonymous class for
jiangli@3741 297 // dynamic language support (JSR 292 enabled). The host class grants
jiangli@3741 298 // its access privileges to this class also. The host class is either
jiangli@3741 299 // named, or a previously loaded anonymous class. A non-anonymous class
jiangli@3741 300 // or an anonymous class loaded through normal classloading does not
jiangli@3741 301 // have this embedded field.
jiangli@3741 302 //
duke@435 303
duke@435 304 friend class SystemDictionary;
duke@435 305
duke@435 306 public:
jiangli@3741 307 bool has_nonstatic_fields() const {
jiangli@3741 308 return (_misc_flags & _misc_has_nonstatic_fields) != 0;
jiangli@3741 309 }
jiangli@3741 310 void set_has_nonstatic_fields(bool b) {
jiangli@3741 311 if (b) {
jiangli@3741 312 _misc_flags |= _misc_has_nonstatic_fields;
jiangli@3741 313 } else {
jiangli@3741 314 _misc_flags &= ~_misc_has_nonstatic_fields;
jiangli@3741 315 }
jiangli@3741 316 }
coleenp@548 317
duke@435 318 // field sizes
duke@435 319 int nonstatic_field_size() const { return _nonstatic_field_size; }
duke@435 320 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; }
duke@435 321
duke@435 322 int static_field_size() const { return _static_field_size; }
duke@435 323 void set_static_field_size(int size) { _static_field_size = size; }
duke@435 324
jiangli@3373 325 int static_oop_field_count() const { return (int)_static_oop_field_count; }
jiangli@3373 326 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; }
duke@435 327
duke@435 328 // Java vtable
duke@435 329 int vtable_length() const { return _vtable_len; }
duke@435 330 void set_vtable_length(int len) { _vtable_len = len; }
duke@435 331
duke@435 332 // Java itable
duke@435 333 int itable_length() const { return _itable_len; }
duke@435 334 void set_itable_length(int len) { _itable_len = len; }
duke@435 335
duke@435 336 // array klasses
coleenp@4037 337 Klass* array_klasses() const { return _array_klasses; }
coleenp@4037 338 void set_array_klasses(Klass* k) { _array_klasses = k; }
duke@435 339
duke@435 340 // methods
coleenp@4037 341 Array<Method*>* methods() const { return _methods; }
coleenp@4037 342 void set_methods(Array<Method*>* a) { _methods = a; }
coleenp@4037 343 Method* method_with_idnum(int idnum);
duke@435 344
duke@435 345 // method ordering
coleenp@4037 346 Array<int>* method_ordering() const { return _method_ordering; }
coleenp@4037 347 void set_method_ordering(Array<int>* m) { _method_ordering = m; }
duke@435 348
duke@435 349 // interfaces
coleenp@4037 350 Array<Klass*>* local_interfaces() const { return _local_interfaces; }
coleenp@4037 351 void set_local_interfaces(Array<Klass*>* a) {
coleenp@4037 352 guarantee(_local_interfaces == NULL || a == NULL, "Just checking");
coleenp@4037 353 _local_interfaces = a; }
coleenp@4037 354 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; }
coleenp@4037 355 void set_transitive_interfaces(Array<Klass*>* a) {
coleenp@4037 356 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking");
coleenp@4037 357 _transitive_interfaces = a; }
duke@435 358
never@3137 359 private:
never@3137 360 friend class fieldDescriptor;
never@3137 361 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); }
never@3137 362
never@3137 363 public:
never@3137 364 int field_offset (int index) const { return field(index)->offset(); }
never@3137 365 int field_access_flags(int index) const { return field(index)->access_flags(); }
never@3137 366 Symbol* field_name (int index) const { return field(index)->name(constants()); }
never@3137 367 Symbol* field_signature (int index) const { return field(index)->signature(constants()); }
never@3137 368
never@3137 369 // Number of Java declared fields
jiangli@3373 370 int java_fields_count() const { return (int)_java_fields_count; }
never@3137 371
coleenp@4037 372 Array<u2>* fields() const { return _fields; }
never@3137 373
coleenp@4037 374 void set_fields(Array<u2>* f, u2 java_fields_count) {
coleenp@4037 375 guarantee(_fields == NULL || f == NULL, "Just checking");
coleenp@4037 376 _fields = f;
never@3137 377 _java_fields_count = java_fields_count;
duke@435 378 }
duke@435 379
duke@435 380 // inner classes
coleenp@4037 381 Array<u2>* inner_classes() const { return _inner_classes; }
coleenp@4037 382 void set_inner_classes(Array<u2>* f) { _inner_classes = f; }
duke@435 383
duke@435 384 enum InnerClassAttributeOffset {
duke@435 385 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814
duke@435 386 inner_class_inner_class_info_offset = 0,
duke@435 387 inner_class_outer_class_info_offset = 1,
duke@435 388 inner_class_inner_name_offset = 2,
duke@435 389 inner_class_access_flags_offset = 3,
duke@435 390 inner_class_next_offset = 4
duke@435 391 };
duke@435 392
jiangli@3670 393 enum EnclosingMethodAttributeOffset {
jiangli@3670 394 enclosing_method_class_index_offset = 0,
jiangli@3670 395 enclosing_method_method_index_offset = 1,
jiangli@3670 396 enclosing_method_attribute_size = 2
jiangli@3670 397 };
jiangli@3670 398
acorn@1087 399 // method override check
coleenp@2497 400 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS);
acorn@1087 401
duke@435 402 // package
coleenp@4037 403 bool is_same_class_package(Klass* class2);
coleenp@2497 404 bool is_same_class_package(oop classloader2, Symbol* classname2);
coleenp@2497 405 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2);
duke@435 406
jrose@1100 407 // find an enclosing class (defined where original code was, in jvm.cpp!)
coleenp@4037 408 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) {
coleenp@4037 409 instanceKlassHandle self(THREAD, this);
xlu@1561 410 return compute_enclosing_class_impl(self, inner_is_member, THREAD);
jrose@1100 411 }
coleenp@4037 412 static Klass* compute_enclosing_class_impl(instanceKlassHandle self,
xlu@1561 413 bool* inner_is_member, TRAPS);
jrose@1100 414
jrose@1100 415 // tell if two classes have the same enclosing class (at package level)
coleenp@4037 416 bool is_same_package_member(Klass* class2, TRAPS) {
coleenp@4037 417 instanceKlassHandle self(THREAD, this);
jrose@1100 418 return is_same_package_member_impl(self, class2, THREAD);
jrose@1100 419 }
jrose@1100 420 static bool is_same_package_member_impl(instanceKlassHandle self,
coleenp@4037 421 Klass* class2, TRAPS);
jrose@1100 422
duke@435 423 // initialization state
duke@435 424 bool is_loaded() const { return _init_state >= loaded; }
duke@435 425 bool is_linked() const { return _init_state >= linked; }
duke@435 426 bool is_initialized() const { return _init_state == fully_initialized; }
duke@435 427 bool is_not_initialized() const { return _init_state < being_initialized; }
duke@435 428 bool is_being_initialized() const { return _init_state == being_initialized; }
duke@435 429 bool is_in_error_state() const { return _init_state == initialization_error; }
duke@435 430 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; }
coleenp@3368 431 ClassState init_state() { return (ClassState)_init_state; }
jiangli@3741 432 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; }
acorn@1408 433
acorn@1408 434 // defineClass specified verification
jiangli@3741 435 bool should_verify_class() const {
jiangli@3741 436 return (_misc_flags & _misc_should_verify_class) != 0;
jiangli@3741 437 }
jiangli@3741 438 void set_should_verify_class(bool value) {
jiangli@3741 439 if (value) {
jiangli@3741 440 _misc_flags |= _misc_should_verify_class;
jiangli@3741 441 } else {
jiangli@3741 442 _misc_flags &= ~_misc_should_verify_class;
jiangli@3741 443 }
jiangli@3741 444 }
duke@435 445
duke@435 446 // marking
dcubed@3401 447 bool is_marked_dependent() const { return _is_marked_dependent; }
dcubed@3401 448 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; }
duke@435 449
duke@435 450 // initialization (virtuals from Klass)
duke@435 451 bool should_be_initialized() const; // means that initialize should be called
duke@435 452 void initialize(TRAPS);
duke@435 453 void link_class(TRAPS);
duke@435 454 bool link_class_or_fail(TRAPS); // returns false on failure
duke@435 455 void unlink_class();
duke@435 456 void rewrite_class(TRAPS);
coleenp@2945 457 void relocate_and_link_methods(TRAPS);
coleenp@4037 458 Method* class_initializer();
duke@435 459
duke@435 460 // set the class to initialized if no static initializer is present
duke@435 461 void eager_initialize(Thread *thread);
duke@435 462
duke@435 463 // reference type
jiangli@3526 464 ReferenceType reference_type() const { return (ReferenceType)_reference_type; }
jiangli@3526 465 void set_reference_type(ReferenceType t) {
jiangli@3526 466 assert(t == (u1)t, "overflow");
jiangli@3526 467 _reference_type = (u1)t;
jiangli@3526 468 }
duke@435 469
coleenp@4037 470 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); }
johnc@2781 471
duke@435 472 // find local field, returns true if found
coleenp@2497 473 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
duke@435 474 // find field in direct superinterfaces, returns the interface in which the field is defined
coleenp@4037 475 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
duke@435 476 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined
coleenp@4037 477 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
duke@435 478 // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined
coleenp@4037 479 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const;
duke@435 480
duke@435 481 // find a non-static or static field given its offset within the class.
duke@435 482 bool contains_field_offset(int offset) {
coleenp@548 483 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
duke@435 484 }
duke@435 485
duke@435 486 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
duke@435 487 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
duke@435 488
duke@435 489 // find a local method (returns NULL if not found)
coleenp@4037 490 Method* find_method(Symbol* name, Symbol* signature) const;
coleenp@4037 491 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature);
duke@435 492
duke@435 493 // lookup operation (returns NULL if not found)
coleenp@4037 494 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const;
duke@435 495
duke@435 496 // lookup a method in all the interfaces that this class implements
duke@435 497 // (returns NULL if not found)
coleenp@4037 498 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const;
duke@435 499
kamg@4245 500 // Find method indices by name. If a method with the specified name is
kamg@4245 501 // found the index to the first method is returned, and 'end' is filled in
kamg@4245 502 // with the index of first non-name-matching method. If no method is found
kamg@4245 503 // -1 is returned.
kamg@4245 504 int find_method_by_name(Symbol* name, int* end);
kamg@4245 505 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end);
kamg@4245 506
duke@435 507 // constant pool
coleenp@4037 508 ConstantPool* constants() const { return _constants; }
coleenp@4037 509 void set_constants(ConstantPool* c) { _constants = c; }
duke@435 510
duke@435 511 // protection domain
duke@435 512 oop protection_domain() { return _protection_domain; }
coleenp@4037 513 void set_protection_domain(oop pd) { klass_oop_store(&_protection_domain, pd); }
duke@435 514
jrose@866 515 // host class
coleenp@4037 516 Klass* host_klass() const {
coleenp@4037 517 Klass** hk = (Klass**)adr_host_klass();
jiangli@3741 518 if (hk == NULL) {
jiangli@3741 519 return NULL;
jiangli@3741 520 } else {
jiangli@3741 521 return *hk;
jiangli@3741 522 }
jiangli@3741 523 }
coleenp@4037 524 void set_host_klass(Klass* host) {
jiangli@3741 525 assert(is_anonymous(), "not anonymous");
coleenp@4037 526 Klass** addr = (Klass**)adr_host_klass();
jiangli@3741 527 assert(addr != NULL, "no reversed space");
coleenp@4037 528 *addr = host;
jiangli@3741 529 }
jiangli@3741 530 bool is_anonymous() const {
jiangli@3741 531 return (_misc_flags & _misc_is_anonymous) != 0;
jiangli@3741 532 }
jiangli@3741 533 void set_is_anonymous(bool value) {
jiangli@3741 534 if (value) {
jiangli@3741 535 _misc_flags |= _misc_is_anonymous;
jiangli@3741 536 } else {
jiangli@3741 537 _misc_flags &= ~_misc_is_anonymous;
jiangli@3741 538 }
jiangli@3741 539 }
jrose@866 540
duke@435 541 // signers
duke@435 542 objArrayOop signers() const { return _signers; }
coleenp@4037 543 void set_signers(objArrayOop s) { klass_oop_store((oop*)&_signers, s); }
duke@435 544
duke@435 545 // source file name
coleenp@2497 546 Symbol* source_file_name() const { return _source_file_name; }
coleenp@2497 547 void set_source_file_name(Symbol* n);
duke@435 548
duke@435 549 // minor and major version numbers of class file
duke@435 550 u2 minor_version() const { return _minor_version; }
duke@435 551 void set_minor_version(u2 minor_version) { _minor_version = minor_version; }
duke@435 552 u2 major_version() const { return _major_version; }
duke@435 553 void set_major_version(u2 major_version) { _major_version = major_version; }
duke@435 554
duke@435 555 // source debug extension
fparain@3906 556 char* source_debug_extension() const { return _source_debug_extension; }
fparain@3906 557 void set_source_debug_extension(char* array, int length);
coleenp@2497 558
coleenp@2497 559 // symbol unloading support (refcount already added)
coleenp@2497 560 Symbol* array_name() { return _array_name; }
coleenp@2497 561 void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; }
duke@435 562
duke@435 563 // nonstatic oop-map blocks
jcoomes@1374 564 static int nonstatic_oop_map_size(unsigned int oop_map_count) {
jcoomes@1373 565 return oop_map_count * OopMapBlock::size_in_words();
jcoomes@1373 566 }
jcoomes@1374 567 unsigned int nonstatic_oop_map_count() const {
jcoomes@1373 568 return _nonstatic_oop_map_size / OopMapBlock::size_in_words();
jcoomes@1373 569 }
jcoomes@1373 570 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; }
jcoomes@1373 571 void set_nonstatic_oop_map_size(int words) {
jcoomes@1373 572 _nonstatic_oop_map_size = words;
jcoomes@1373 573 }
duke@435 574
duke@435 575 // RedefineClasses() support for previous versions:
duke@435 576 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods,
duke@435 577 int emcp_method_count);
dcubed@1412 578 // If the _previous_versions array is non-NULL, then this klass
dcubed@1412 579 // has been redefined at least once even if we aren't currently
dcubed@1412 580 // tracking a previous version.
dcubed@1412 581 bool has_been_redefined() const { return _previous_versions != NULL; }
duke@435 582 bool has_previous_version() const;
duke@435 583 void init_previous_versions() {
duke@435 584 _previous_versions = NULL;
duke@435 585 }
duke@435 586 GrowableArray<PreviousVersionNode *>* previous_versions() const {
duke@435 587 return _previous_versions;
duke@435 588 }
duke@435 589
coleenp@4037 590 static void purge_previous_versions(InstanceKlass* ik);
coleenp@4037 591
duke@435 592 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation
duke@435 593 void set_cached_class_file(unsigned char *class_file_bytes,
duke@435 594 jint class_file_len) { _cached_class_file_len = class_file_len;
duke@435 595 _cached_class_file_bytes = class_file_bytes; }
duke@435 596 jint get_cached_class_file_len() { return _cached_class_file_len; }
duke@435 597 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; }
duke@435 598
duke@435 599 // JVMTI: Support for caching of field indices, types, and offsets
duke@435 600 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) {
duke@435 601 _jvmti_cached_class_field_map = descriptor;
duke@435 602 }
duke@435 603 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const {
duke@435 604 return _jvmti_cached_class_field_map;
duke@435 605 }
duke@435 606
kamg@4245 607 bool has_default_methods() const { return _has_default_methods; }
kamg@4245 608 void set_has_default_methods(bool b) { _has_default_methods = b; }
kamg@4245 609
coleenp@4037 610 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available
duke@435 611 inline u2 next_method_idnum();
duke@435 612 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; }
duke@435 613
duke@435 614 // generics support
coleenp@2497 615 Symbol* generic_signature() const { return _generic_signature; }
coleenp@2497 616 void set_generic_signature(Symbol* sig) { _generic_signature = sig; }
coleenp@2497 617
jiangli@3670 618 u2 enclosing_method_data(int offset);
jiangli@3670 619 u2 enclosing_method_class_index() {
jiangli@3670 620 return enclosing_method_data(enclosing_method_class_index_offset);
jiangli@3670 621 }
jiangli@3670 622 u2 enclosing_method_method_index() {
jiangli@3670 623 return enclosing_method_data(enclosing_method_method_index_offset);
jiangli@3670 624 }
duke@435 625 void set_enclosing_method_indices(u2 class_index,
jiangli@3670 626 u2 method_index);
duke@435 627
duke@435 628 // jmethodID support
dcubed@1412 629 static jmethodID get_jmethod_id(instanceKlassHandle ik_h,
dcubed@1412 630 methodHandle method_h);
dcubed@1412 631 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h,
dcubed@1412 632 size_t idnum, jmethodID new_id, jmethodID* new_jmeths,
dcubed@1412 633 jmethodID* to_dealloc_id_p,
dcubed@1412 634 jmethodID** to_dealloc_jmeths_p);
dcubed@1412 635 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum,
dcubed@1412 636 size_t *length_p, jmethodID* id_p);
coleenp@4037 637 jmethodID jmethod_id_or_null(Method* method);
duke@435 638
duke@435 639 // cached itable index support
duke@435 640 void set_cached_itable_index(size_t idnum, int index);
duke@435 641 int cached_itable_index(size_t idnum);
duke@435 642
duke@435 643 // annotations support
coleenp@4037 644 Annotations* annotations() const { return _annotations; }
coleenp@4037 645 void set_annotations(Annotations* anno) { _annotations = anno; }
coleenp@4037 646 AnnotationArray* class_annotations() const {
coleenp@4037 647 if (annotations() == NULL) return NULL;
coleenp@4037 648 return annotations()->class_annotations();
coleenp@4037 649 }
coleenp@4037 650 Array<AnnotationArray*>* fields_annotations() const {
coleenp@4037 651 if (annotations() == NULL) return NULL;
coleenp@4037 652 return annotations()->fields_annotations();
coleenp@4037 653 }
duke@435 654
duke@435 655 // allocation
duke@435 656 instanceOop allocate_instance(TRAPS);
duke@435 657
duke@435 658 // additional member function to return a handle
duke@435 659 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); }
duke@435 660
duke@435 661 objArrayOop allocate_objArray(int n, int length, TRAPS);
duke@435 662 // Helper function
duke@435 663 static instanceOop register_finalizer(instanceOop i, TRAPS);
duke@435 664
duke@435 665 // Check whether reflection/jni/jvm code is allowed to instantiate this class;
duke@435 666 // if not, throw either an Error or an Exception.
duke@435 667 virtual void check_valid_for_instantiation(bool throwError, TRAPS);
duke@435 668
duke@435 669 // initialization
duke@435 670 void call_class_initializer(TRAPS);
duke@435 671 void set_initialization_state_and_notify(ClassState state, TRAPS);
duke@435 672
duke@435 673 // OopMapCache support
duke@435 674 OopMapCache* oop_map_cache() { return _oop_map_cache; }
duke@435 675 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; }
duke@435 676 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry);
duke@435 677
duke@435 678 // JNI identifier support (for static fields - for jni performance)
duke@435 679 JNIid* jni_ids() { return _jni_ids; }
duke@435 680 void set_jni_ids(JNIid* ids) { _jni_ids = ids; }
duke@435 681 JNIid* jni_id_for(int offset);
duke@435 682
duke@435 683 // maintenance of deoptimization dependencies
duke@435 684 int mark_dependent_nmethods(DepChange& changes);
duke@435 685 void add_dependent_nmethod(nmethod* nm);
duke@435 686 void remove_dependent_nmethod(nmethod* nm);
duke@435 687
duke@435 688 // On-stack replacement support
duke@435 689 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; };
duke@435 690 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; };
duke@435 691 void add_osr_nmethod(nmethod* n);
duke@435 692 void remove_osr_nmethod(nmethod* n);
coleenp@4037 693 nmethod* lookup_osr_nmethod(Method* const m, int bci, int level, bool match_level) const;
duke@435 694
coleenp@4037 695 // Breakpoint support (see methods on Method* for details)
duke@435 696 BreakpointInfo* breakpoints() const { return _breakpoints; };
duke@435 697 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; };
duke@435 698
duke@435 699 // support for stub routines
coleenp@4037 700 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); }
rbackman@3709 701 TRACE_DEFINE_OFFSET;
coleenp@4037 702 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); }
duke@435 703
duke@435 704 // subclass/subinterface checks
coleenp@4037 705 bool implements_interface(Klass* k) const;
duke@435 706
jiangli@3701 707 // Access to the implementor of an interface.
coleenp@4037 708 Klass* implementor() const
jiangli@3701 709 {
coleenp@4037 710 Klass** k = adr_implementor();
jiangli@3701 711 if (k == NULL) {
jiangli@3701 712 return NULL;
jiangli@3701 713 } else {
jiangli@3701 714 return *k;
jiangli@3701 715 }
duke@435 716 }
jiangli@3701 717
coleenp@4037 718 void set_implementor(Klass* k) {
jiangli@3701 719 assert(is_interface(), "not interface");
coleenp@4037 720 Klass** addr = adr_implementor();
coleenp@4037 721 *addr = k;
jiangli@3701 722 }
jiangli@3701 723
jiangli@3701 724 int nof_implementors() const {
coleenp@4037 725 Klass* k = implementor();
jiangli@3701 726 if (k == NULL) {
jiangli@3701 727 return 0;
coleenp@4037 728 } else if (k != this) {
jiangli@3701 729 return 1;
jiangli@3701 730 } else {
jiangli@3701 731 return 2;
jiangli@3701 732 }
jiangli@3701 733 }
jiangli@3701 734
coleenp@4037 735 void add_implementor(Klass* k); // k is a new class that implements this interface
duke@435 736 void init_implementor(); // initialize
duke@435 737
duke@435 738 // link this class into the implementors list of every interface it implements
duke@435 739 void process_interfaces(Thread *thread);
duke@435 740
duke@435 741 // virtual operations from Klass
duke@435 742 bool is_leaf_class() const { return _subklass == NULL; }
coleenp@4037 743 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
coleenp@4037 744 bool compute_is_subtype_of(Klass* k);
duke@435 745 bool can_be_primary_super_slow() const;
duke@435 746 int oop_size(oop obj) const { return size_helper(); }
duke@435 747 bool oop_is_instance_slow() const { return true; }
duke@435 748
duke@435 749 // Iterators
duke@435 750 void do_local_static_fields(FieldClosure* cl);
duke@435 751 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields
duke@435 752 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS);
duke@435 753
coleenp@4037 754 void methods_do(void f(Method* method));
coleenp@4037 755 void array_klasses_do(void f(Klass* k));
coleenp@4037 756 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);
coleenp@4037 757 void with_array_klasses_do(void f(Klass* k));
duke@435 758 bool super_types_do(SuperTypeClosure* blk);
duke@435 759
coleenp@4037 760 // Casting from Klass*
coleenp@4037 761 static InstanceKlass* cast(Klass* k) {
never@2658 762 assert(k->is_klass(), "must be");
coleenp@4037 763 assert(k->oop_is_instance(), "cast to InstanceKlass");
coleenp@4037 764 return (InstanceKlass*) k;
duke@435 765 }
duke@435 766
kamg@4245 767 InstanceKlass* java_super() const {
kamg@4245 768 return (super() == NULL) ? NULL : cast(super());
kamg@4245 769 }
kamg@4245 770
duke@435 771 // Sizing (in words)
coleenp@4037 772 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); }
coleenp@4037 773 static int size(int vtable_length, int itable_length,
coleenp@4037 774 int nonstatic_oop_map_size,
coleenp@4037 775 bool is_interface, bool is_anonymous) {
coleenp@4037 776 return align_object_size(header_size() +
coleenp@4037 777 align_object_offset(vtable_length) +
coleenp@4037 778 align_object_offset(itable_length) +
coleenp@4037 779 ((is_interface || is_anonymous) ?
coleenp@4037 780 align_object_offset(nonstatic_oop_map_size) :
coleenp@4037 781 nonstatic_oop_map_size) +
coleenp@4037 782 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) +
coleenp@4037 783 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0));
coleenp@4037 784 }
coleenp@4037 785 int size() const { return size(vtable_length(),
coleenp@4037 786 itable_length(),
coleenp@4037 787 nonstatic_oop_map_size(),
coleenp@4037 788 is_interface(),
coleenp@4037 789 is_anonymous());
coleenp@4037 790 }
jiangli@3701 791
duke@435 792 static int vtable_start_offset() { return header_size(); }
coleenp@4037 793 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; }
duke@435 794
coleenp@4037 795 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); }
duke@435 796 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); }
coleenp@4037 797 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; }
duke@435 798
duke@435 799 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); }
duke@435 800
never@2658 801 address static_field_addr(int offset);
coleenp@548 802
coleenp@548 803 OopMapBlock* start_of_nonstatic_oop_maps() const {
never@2658 804 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length()));
coleenp@548 805 }
duke@435 806
coleenp@4037 807 Klass** adr_implementor() const {
jiangli@3701 808 if (is_interface()) {
coleenp@4037 809 return (Klass**)(start_of_nonstatic_oop_maps() +
jiangli@3741 810 nonstatic_oop_map_count());
jiangli@3701 811 } else {
jiangli@3701 812 return NULL;
jiangli@3701 813 }
jiangli@3701 814 };
jiangli@3701 815
coleenp@4037 816 Klass** adr_host_klass() const {
jiangli@3741 817 if (is_anonymous()) {
coleenp@4037 818 Klass** adr_impl = adr_implementor();
jiangli@3741 819 if (adr_impl != NULL) {
jiangli@3741 820 return adr_impl + 1;
jiangli@3741 821 } else {
coleenp@4037 822 return (Klass**)(start_of_nonstatic_oop_maps() +
jiangli@3741 823 nonstatic_oop_map_count());
jiangli@3741 824 }
jiangli@3741 825 } else {
jiangli@3741 826 return NULL;
jiangli@3741 827 }
jiangli@3741 828 }
jiangli@3741 829
duke@435 830 // Allocation profiling support
duke@435 831 juint alloc_size() const { return _alloc_count * size_helper(); }
duke@435 832 void set_alloc_size(juint n) {}
duke@435 833
duke@435 834 // Use this to return the size of an instance in heap words:
duke@435 835 int size_helper() const {
duke@435 836 return layout_helper_to_size_helper(layout_helper());
duke@435 837 }
duke@435 838
duke@435 839 // This bit is initialized in classFileParser.cpp.
duke@435 840 // It is false under any of the following conditions:
duke@435 841 // - the class is abstract (including any interface)
duke@435 842 // - the class has a finalizer (if !RegisterFinalizersAtInit)
duke@435 843 // - the class size is larger than FastAllocateSizeLimit
duke@435 844 // - the class is java/lang/Class, which cannot be allocated directly
duke@435 845 bool can_be_fastpath_allocated() const {
duke@435 846 return !layout_helper_needs_slow_path(layout_helper());
duke@435 847 }
duke@435 848
duke@435 849 // Java vtable/itable
duke@435 850 klassVtable* vtable() const; // return new klassVtable wrapper
coleenp@4037 851 inline Method* method_at_vtable(int index);
duke@435 852 klassItable* itable() const; // return new klassItable wrapper
coleenp@4037 853 Method* method_at_itable(Klass* holder, int index, TRAPS);
duke@435 854
duke@435 855 // Garbage collection
coleenp@4037 856 virtual void oops_do(OopClosure* cl);
coleenp@4037 857
duke@435 858 void oop_follow_contents(oop obj);
duke@435 859 int oop_adjust_pointers(oop obj);
duke@435 860
coleenp@4037 861 void clean_implementors_list(BoolObjectClosure* is_alive);
coleenp@4037 862 void clean_method_data(BoolObjectClosure* is_alive);
coleenp@4037 863
coleenp@4037 864 // Explicit metaspace deallocation of fields
coleenp@4037 865 // For RedefineClasses, we need to deallocate instanceKlasses
coleenp@4037 866 void deallocate_contents(ClassLoaderData* loader_data);
coleenp@4037 867
coleenp@4037 868 // The constant pool is on stack if any of the methods are executing or
coleenp@4037 869 // referenced by handles.
coleenp@4037 870 bool on_stack() const { return _constants->on_stack(); }
coleenp@4037 871
duke@435 872 void release_C_heap_structures();
duke@435 873
duke@435 874 // Parallel Scavenge and Parallel Old
duke@435 875 PARALLEL_GC_DECLS
duke@435 876
duke@435 877 // Naming
jrose@1474 878 const char* signature_name() const;
duke@435 879
duke@435 880 // Iterators
coleenp@4037 881 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
duke@435 882 return oop_oop_iterate_v(obj, blk);
duke@435 883 }
duke@435 884
coleenp@4037 885 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
duke@435 886 return oop_oop_iterate_v_m(obj, blk, mr);
duke@435 887 }
duke@435 888
ysr@777 889 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
ysr@777 890 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
ysr@777 891 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \
duke@435 892 MemRegion mr);
duke@435 893
duke@435 894 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL)
ysr@777 895 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL)
ysr@777 896
ysr@777 897 #ifndef SERIALGC
ysr@777 898 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
ysr@777 899 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
ysr@777 900
ysr@777 901 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
ysr@777 902 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
ysr@777 903 #endif // !SERIALGC
duke@435 904
coleenp@4037 905 u2 idnum_allocated_count() const { return _idnum_allocated_count; }
duke@435 906 private:
duke@435 907 // initialization state
duke@435 908 #ifdef ASSERT
duke@435 909 void set_init_state(ClassState state);
duke@435 910 #else
coleenp@3368 911 void set_init_state(ClassState state) { _init_state = (u1)state; }
duke@435 912 #endif
jiangli@3741 913 void set_rewritten() { _misc_flags |= _misc_rewritten; }
duke@435 914 void set_init_thread(Thread *thread) { _init_thread = thread; }
duke@435 915
dcubed@1412 916 // The RedefineClasses() API can cause new method idnums to be needed
dcubed@1412 917 // which will cause the caches to grow. Safety requires different
dcubed@1412 918 // cache management logic if the caches can grow instead of just
dcubed@1412 919 // going from NULL to non-NULL.
dcubed@1412 920 bool idnum_can_increment() const { return has_been_redefined(); }
duke@435 921 jmethodID* methods_jmethod_ids_acquire() const
duke@435 922 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); }
duke@435 923 void release_set_methods_jmethod_ids(jmethodID* jmeths)
duke@435 924 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); }
duke@435 925
duke@435 926 int* methods_cached_itable_indices_acquire() const
duke@435 927 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); }
duke@435 928 void release_set_methods_cached_itable_indices(int* indices)
duke@435 929 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); }
duke@435 930
coleenp@4037 931 // Lock during initialization
coleenp@4037 932 volatile oop init_lock() const;
coleenp@4037 933 void set_init_lock(oop value) { klass_oop_store(&_init_lock, value); }
coleenp@4037 934 void fence_and_clear_init_lock(); // after fully_initialized
duke@435 935
duke@435 936 // Offsets for memory management
duke@435 937 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;}
duke@435 938 oop* adr_signers() const { return (oop*)&this->_signers;}
coleenp@4037 939 oop* adr_init_lock() const { return (oop*)&this->_init_lock;}
duke@435 940
duke@435 941 // Static methods that are used to implement member methods where an exposed this pointer
duke@435 942 // is needed due to possible GCs
duke@435 943 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS);
duke@435 944 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS);
duke@435 945 static void initialize_impl (instanceKlassHandle this_oop, TRAPS);
duke@435 946 static void eager_initialize_impl (instanceKlassHandle this_oop);
duke@435 947 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS);
duke@435 948 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS);
coleenp@4037 949 static Klass* array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS);
duke@435 950 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS);
duke@435 951 /* jni_id_for_impl for jfieldID only */
duke@435 952 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset);
duke@435 953
duke@435 954 // Returns the array class for the n'th dimension
coleenp@4037 955 Klass* array_klass_impl(bool or_null, int n, TRAPS);
duke@435 956
duke@435 957 // Returns the array class with this class as element type
coleenp@4037 958 Klass* array_klass_impl(bool or_null, TRAPS);
duke@435 959
duke@435 960 public:
coleenp@4037 961 // CDS support - remove and restore oops from metadata. Oops are not shared.
duke@435 962 virtual void remove_unshareable_info();
coleenp@4037 963 virtual void restore_unshareable_info(TRAPS);
duke@435 964
duke@435 965 // jvm support
duke@435 966 jint compute_modifier_flags(TRAPS) const;
duke@435 967
duke@435 968 public:
duke@435 969 // JVMTI support
duke@435 970 jint jvmti_class_status() const;
duke@435 971
duke@435 972 public:
duke@435 973 // Printing
coleenp@4037 974 #ifndef PRODUCT
coleenp@4037 975 void print_on(outputStream* st) const;
coleenp@4037 976 #endif
coleenp@4037 977 void print_value_on(outputStream* st) const;
coleenp@4037 978
jrose@1590 979 void oop_print_value_on(oop obj, outputStream* st);
coleenp@4037 980
jrose@1590 981 #ifndef PRODUCT
duke@435 982 void oop_print_on (oop obj, outputStream* st);
duke@435 983
duke@435 984 void print_dependent_nmethods(bool verbose = false);
duke@435 985 bool is_dependent_nmethod(nmethod* nm);
duke@435 986 #endif
duke@435 987
coleenp@4037 988 const char* internal_name() const;
coleenp@4037 989
duke@435 990 // Verification
coleenp@4037 991 void verify_on(outputStream* st);
coleenp@4037 992
duke@435 993 void oop_verify_on(oop obj, outputStream* st);
duke@435 994 };
duke@435 995
coleenp@4037 996 inline Method* InstanceKlass::method_at_vtable(int index) {
duke@435 997 #ifndef PRODUCT
duke@435 998 assert(index >= 0, "valid vtable index");
duke@435 999 if (DebugVtables) {
duke@435 1000 verify_vtable_index(index);
duke@435 1001 }
duke@435 1002 #endif
duke@435 1003 vtableEntry* ve = (vtableEntry*)start_of_vtable();
duke@435 1004 return ve[index].method();
duke@435 1005 }
duke@435 1006
duke@435 1007 // for adding methods
duke@435 1008 // UNSET_IDNUM return means no more ids available
coleenp@4037 1009 inline u2 InstanceKlass::next_method_idnum() {
coleenp@4037 1010 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) {
coleenp@4037 1011 return ConstMethod::UNSET_IDNUM; // no more ids available
duke@435 1012 } else {
duke@435 1013 return _idnum_allocated_count++;
duke@435 1014 }
duke@435 1015 }
duke@435 1016
duke@435 1017
duke@435 1018 /* JNIid class for jfieldIDs only */
zgu@3900 1019 class JNIid: public CHeapObj<mtClass> {
duke@435 1020 friend class VMStructs;
duke@435 1021 private:
coleenp@4037 1022 Klass* _holder;
duke@435 1023 JNIid* _next;
duke@435 1024 int _offset;
duke@435 1025 #ifdef ASSERT
duke@435 1026 bool _is_static_field_id;
duke@435 1027 #endif
duke@435 1028
duke@435 1029 public:
duke@435 1030 // Accessors
coleenp@4037 1031 Klass* holder() const { return _holder; }
duke@435 1032 int offset() const { return _offset; }
duke@435 1033 JNIid* next() { return _next; }
duke@435 1034 // Constructor
coleenp@4037 1035 JNIid(Klass* holder, int offset, JNIid* next);
duke@435 1036 // Identifier lookup
duke@435 1037 JNIid* find(int offset);
duke@435 1038
never@2658 1039 bool find_local_field(fieldDescriptor* fd) {
coleenp@4037 1040 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd);
never@2658 1041 }
never@2658 1042
duke@435 1043 static void deallocate(JNIid* id);
duke@435 1044 // Debugging
duke@435 1045 #ifdef ASSERT
duke@435 1046 bool is_static_field_id() const { return _is_static_field_id; }
duke@435 1047 void set_is_static_field_id() { _is_static_field_id = true; }
duke@435 1048 #endif
coleenp@4037 1049 void verify(Klass* holder);
duke@435 1050 };
duke@435 1051
duke@435 1052
duke@435 1053 // If breakpoints are more numerous than just JVMTI breakpoints,
duke@435 1054 // consider compressing this data structure.
coleenp@4037 1055 // It is currently a simple linked list defined in method.hpp.
duke@435 1056
duke@435 1057 class BreakpointInfo;
duke@435 1058
duke@435 1059
duke@435 1060 // A collection point for interesting information about the previous
coleenp@4037 1061 // version(s) of an InstanceKlass. This class uses weak references to
duke@435 1062 // the information so that the information may be collected as needed
dcubed@482 1063 // by the system. If the information is shared, then a regular
dcubed@482 1064 // reference must be used because a weak reference would be seen as
dcubed@482 1065 // collectible. A GrowableArray of PreviousVersionNodes is attached
coleenp@4037 1066 // to the InstanceKlass as needed. See PreviousVersionWalker below.
zgu@3900 1067 class PreviousVersionNode : public CHeapObj<mtClass> {
duke@435 1068 private:
dcubed@482 1069 // A shared ConstantPool is never collected so we'll always have
dcubed@482 1070 // a reference to it so we can update items in the cache. We'll
dcubed@482 1071 // have a weak reference to a non-shared ConstantPool until all
dcubed@482 1072 // of the methods (EMCP or obsolete) have been collected; the
dcubed@482 1073 // non-shared ConstantPool becomes collectible at that point.
coleenp@4037 1074 ConstantPool* _prev_constant_pool; // regular or weak reference
dcubed@482 1075 bool _prev_cp_is_weak; // true if not a shared ConstantPool
dcubed@482 1076
coleenp@4037 1077 // If the previous version of the InstanceKlass doesn't have any
duke@435 1078 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the
duke@435 1079 // EMCP methods have been collected, then _prev_EMCP_methods can
duke@435 1080 // have a length of zero.
coleenp@4037 1081 GrowableArray<Method*>* _prev_EMCP_methods;
duke@435 1082
duke@435 1083 public:
coleenp@4037 1084 PreviousVersionNode(ConstantPool* prev_constant_pool, bool prev_cp_is_weak,
coleenp@4037 1085 GrowableArray<Method*>* prev_EMCP_methods);
duke@435 1086 ~PreviousVersionNode();
coleenp@4037 1087 ConstantPool* prev_constant_pool() const {
duke@435 1088 return _prev_constant_pool;
duke@435 1089 }
coleenp@4037 1090 GrowableArray<Method*>* prev_EMCP_methods() const {
duke@435 1091 return _prev_EMCP_methods;
duke@435 1092 }
duke@435 1093 };
duke@435 1094
duke@435 1095
duke@435 1096 // A Handle-ized version of PreviousVersionNode.
duke@435 1097 class PreviousVersionInfo : public ResourceObj {
duke@435 1098 private:
duke@435 1099 constantPoolHandle _prev_constant_pool_handle;
coleenp@4037 1100 // If the previous version of the InstanceKlass doesn't have any
duke@435 1101 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the
duke@435 1102 // methods cannot be collected while we hold a handle,
duke@435 1103 // _prev_EMCP_methods should never have a length of zero.
duke@435 1104 GrowableArray<methodHandle>* _prev_EMCP_method_handles;
duke@435 1105
duke@435 1106 public:
duke@435 1107 PreviousVersionInfo(PreviousVersionNode *pv_node);
duke@435 1108 ~PreviousVersionInfo();
duke@435 1109 constantPoolHandle prev_constant_pool_handle() const {
duke@435 1110 return _prev_constant_pool_handle;
duke@435 1111 }
duke@435 1112 GrowableArray<methodHandle>* prev_EMCP_method_handles() const {
duke@435 1113 return _prev_EMCP_method_handles;
duke@435 1114 }
duke@435 1115 };
duke@435 1116
duke@435 1117
duke@435 1118 // Helper object for walking previous versions. This helper cleans up
duke@435 1119 // the Handles that it allocates when the helper object is destroyed.
duke@435 1120 // The PreviousVersionInfo object returned by next_previous_version()
duke@435 1121 // is only valid until a subsequent call to next_previous_version() or
duke@435 1122 // the helper object is destroyed.
duke@435 1123 class PreviousVersionWalker : public StackObj {
duke@435 1124 private:
duke@435 1125 GrowableArray<PreviousVersionNode *>* _previous_versions;
duke@435 1126 int _current_index;
duke@435 1127 // Fields for cleaning up when we are done walking the previous versions:
duke@435 1128 // A HandleMark for the PreviousVersionInfo handles:
duke@435 1129 HandleMark _hm;
duke@435 1130
duke@435 1131 // It would be nice to have a ResourceMark field in this helper also,
duke@435 1132 // but the ResourceMark code says to be careful to delete handles held
duke@435 1133 // in GrowableArrays _before_ deleting the GrowableArray. Since we
duke@435 1134 // can't guarantee the order in which the fields are destroyed, we
duke@435 1135 // have to let the creator of the PreviousVersionWalker object do
duke@435 1136 // the right thing. Also, adding a ResourceMark here causes an
duke@435 1137 // include loop.
duke@435 1138
duke@435 1139 // A pointer to the current info object so we can handle the deletes.
duke@435 1140 PreviousVersionInfo * _current_p;
duke@435 1141
duke@435 1142 public:
coleenp@4037 1143 PreviousVersionWalker(InstanceKlass *ik);
duke@435 1144 ~PreviousVersionWalker();
duke@435 1145
duke@435 1146 // Return the interesting information for the next previous version
duke@435 1147 // of the klass. Returns NULL if there are no more previous versions.
duke@435 1148 PreviousVersionInfo* next_previous_version();
duke@435 1149 };
stefank@2314 1150
never@3138 1151
never@3138 1152 //
never@3138 1153 // nmethodBucket is used to record dependent nmethods for
never@3138 1154 // deoptimization. nmethod dependencies are actually <klass, method>
never@3138 1155 // pairs but we really only care about the klass part for purposes of
never@3138 1156 // finding nmethods which might need to be deoptimized. Instead of
never@3138 1157 // recording the method, a count of how many times a particular nmethod
never@3138 1158 // was recorded is kept. This ensures that any recording errors are
never@3138 1159 // noticed since an nmethod should be removed as many times are it's
never@3138 1160 // added.
never@3138 1161 //
zgu@3900 1162 class nmethodBucket: public CHeapObj<mtClass> {
never@3138 1163 friend class VMStructs;
never@3138 1164 private:
never@3138 1165 nmethod* _nmethod;
never@3138 1166 int _count;
never@3138 1167 nmethodBucket* _next;
never@3138 1168
never@3138 1169 public:
never@3138 1170 nmethodBucket(nmethod* nmethod, nmethodBucket* next) {
never@3138 1171 _nmethod = nmethod;
never@3138 1172 _next = next;
never@3138 1173 _count = 1;
never@3138 1174 }
never@3138 1175 int count() { return _count; }
never@3138 1176 int increment() { _count += 1; return _count; }
never@3138 1177 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; }
never@3138 1178 nmethodBucket* next() { return _next; }
never@3138 1179 void set_next(nmethodBucket* b) { _next = b; }
never@3138 1180 nmethod* get_nmethod() { return _nmethod; }
never@3138 1181 };
never@3138 1182
jiangli@3670 1183 // An iterator that's used to access the inner classes indices in the
coleenp@4037 1184 // InstanceKlass::_inner_classes array.
jiangli@3670 1185 class InnerClassesIterator : public StackObj {
jiangli@3670 1186 private:
coleenp@4037 1187 Array<jushort>* _inner_classes;
jiangli@3670 1188 int _length;
jiangli@3670 1189 int _idx;
jiangli@3670 1190 public:
jiangli@3670 1191
jiangli@3670 1192 InnerClassesIterator(instanceKlassHandle k) {
jiangli@3670 1193 _inner_classes = k->inner_classes();
jiangli@3670 1194 if (k->inner_classes() != NULL) {
jiangli@3670 1195 _length = _inner_classes->length();
jiangli@3670 1196 // The inner class array's length should be the multiple of
jiangli@3670 1197 // inner_class_next_offset if it only contains the InnerClasses
jiangli@3670 1198 // attribute data, or it should be
jiangli@3670 1199 // n*inner_class_next_offset+enclosing_method_attribute_size
jiangli@3670 1200 // if it also contains the EnclosingMethod data.
coleenp@4037 1201 assert((_length % InstanceKlass::inner_class_next_offset == 0 ||
coleenp@4037 1202 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size),
jiangli@3670 1203 "just checking");
jiangli@3670 1204 // Remove the enclosing_method portion if exists.
coleenp@4037 1205 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) {
coleenp@4037 1206 _length -= InstanceKlass::enclosing_method_attribute_size;
jiangli@3670 1207 }
jiangli@3670 1208 } else {
jiangli@3670 1209 _length = 0;
jiangli@3670 1210 }
jiangli@3670 1211 _idx = 0;
jiangli@3670 1212 }
jiangli@3670 1213
jiangli@3670 1214 int length() const {
jiangli@3670 1215 return _length;
jiangli@3670 1216 }
jiangli@3670 1217
jiangli@3670 1218 void next() {
coleenp@4037 1219 _idx += InstanceKlass::inner_class_next_offset;
jiangli@3670 1220 }
jiangli@3670 1221
jiangli@3670 1222 bool done() const {
jiangli@3670 1223 return (_idx >= _length);
jiangli@3670 1224 }
jiangli@3670 1225
jiangli@3670 1226 u2 inner_class_info_index() const {
coleenp@4037 1227 return _inner_classes->at(
coleenp@4037 1228 _idx + InstanceKlass::inner_class_inner_class_info_offset);
jiangli@3670 1229 }
jiangli@3670 1230
jiangli@3670 1231 void set_inner_class_info_index(u2 index) {
coleenp@4037 1232 _inner_classes->at_put(
coleenp@4037 1233 _idx + InstanceKlass::inner_class_inner_class_info_offset, index);
jiangli@3670 1234 }
jiangli@3670 1235
jiangli@3670 1236 u2 outer_class_info_index() const {
coleenp@4037 1237 return _inner_classes->at(
coleenp@4037 1238 _idx + InstanceKlass::inner_class_outer_class_info_offset);
jiangli@3670 1239 }
jiangli@3670 1240
jiangli@3670 1241 void set_outer_class_info_index(u2 index) {
coleenp@4037 1242 _inner_classes->at_put(
coleenp@4037 1243 _idx + InstanceKlass::inner_class_outer_class_info_offset, index);
jiangli@3670 1244 }
jiangli@3670 1245
jiangli@3670 1246 u2 inner_name_index() const {
coleenp@4037 1247 return _inner_classes->at(
coleenp@4037 1248 _idx + InstanceKlass::inner_class_inner_name_offset);
jiangli@3670 1249 }
jiangli@3670 1250
jiangli@3670 1251 void set_inner_name_index(u2 index) {
coleenp@4037 1252 _inner_classes->at_put(
coleenp@4037 1253 _idx + InstanceKlass::inner_class_inner_name_offset, index);
jiangli@3670 1254 }
jiangli@3670 1255
jiangli@3670 1256 u2 inner_access_flags() const {
coleenp@4037 1257 return _inner_classes->at(
coleenp@4037 1258 _idx + InstanceKlass::inner_class_access_flags_offset);
jiangli@3670 1259 }
jiangli@3670 1260 };
jiangli@3670 1261
stefank@2314 1262 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP

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