Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.hpp @ 5967:f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
Summary: Fold instanceKlass::_enclosing_method_class_index and instanceKlass::_enclosing_method_method_index into the instanceKlass::_inner_classes array.
Reviewed-by: never, coleenp
Contributed-by: Jiangli Zhou <jiangli.zhou@oracle.com>
| author | jiangli |
|---|---|
| date | Tue, 13 Mar 2012 13:50:48 -0400 |
| parents | b7b8b6d2f97d |
| children | 49036505ab5f c7ed11779ce8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2227 | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP |
| 26 #define SHARE_VM_OOPS_INSTANCEKLASS_HPP | |
| 27 | |
| 28 #include "oops/constMethodOop.hpp" | |
| 29 #include "oops/constantPoolOop.hpp" | |
| 3938 | 30 #include "oops/fieldInfo.hpp" |
| 1972 | 31 #include "oops/instanceOop.hpp" |
| 32 #include "oops/klassOop.hpp" | |
| 33 #include "oops/klassVtable.hpp" | |
| 34 #include "oops/objArrayOop.hpp" | |
| 35 #include "runtime/handles.hpp" | |
| 36 #include "runtime/os.hpp" | |
| 37 #include "utilities/accessFlags.hpp" | |
| 38 #include "utilities/bitMap.inline.hpp" | |
| 39 | |
| 0 | 40 // An instanceKlass is the VM level representation of a Java class. |
| 41 // It contains all information needed for at class at execution runtime. | |
| 42 | |
| 43 // instanceKlass layout: | |
| 44 // [header ] klassOop | |
| 45 // [klass pointer ] klassOop | |
| 46 // [C++ vtbl pointer ] Klass | |
| 47 // [subtype cache ] Klass | |
| 48 // [instance size ] Klass | |
| 49 // [java mirror ] Klass | |
| 50 // [super ] Klass | |
| 51 // [access_flags ] Klass | |
| 52 // [name ] Klass | |
| 53 // [first subklass ] Klass | |
| 54 // [next sibling ] Klass | |
| 55 // [array klasses ] | |
| 56 // [methods ] | |
| 57 // [local interfaces ] | |
| 58 // [transitive interfaces ] | |
| 59 // [number of implementors ] | |
| 60 // [implementors ] klassOop[2] | |
| 61 // [fields ] | |
| 62 // [constants ] | |
| 63 // [class loader ] | |
| 64 // [protection domain ] | |
| 65 // [signers ] | |
| 66 // [source file name ] | |
| 67 // [inner classes ] | |
| 68 // [static field size ] | |
| 69 // [nonstatic field size ] | |
| 70 // [static oop fields size ] | |
| 71 // [nonstatic oop maps size ] | |
| 72 // [has finalize method ] | |
| 73 // [deoptimization mark bit ] | |
| 74 // [initialization state ] | |
| 75 // [initializing thread ] | |
| 76 // [Java vtable length ] | |
| 77 // [oop map cache (stack maps) ] | |
| 78 // [EMBEDDED Java vtable ] size in words = vtable_len | |
| 79 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size | |
| 80 // | |
| 81 // The embedded nonstatic oop-map blocks are short pairs (offset, length) indicating | |
| 82 // where oops are located in instances of this klass. | |
| 83 | |
| 84 | |
| 85 // forward declaration for class -- see below for definition | |
| 86 class SuperTypeClosure; | |
| 87 class JNIid; | |
| 88 class jniIdMapBase; | |
| 89 class BreakpointInfo; | |
| 90 class fieldDescriptor; | |
| 91 class DepChange; | |
| 92 class nmethodBucket; | |
| 93 class PreviousVersionNode; | |
| 94 class JvmtiCachedClassFieldMap; | |
| 95 | |
| 96 // This is used in iterators below. | |
| 97 class FieldClosure: public StackObj { | |
| 98 public: | |
| 99 virtual void do_field(fieldDescriptor* fd) = 0; | |
| 100 }; | |
| 101 | |
| 102 #ifndef PRODUCT | |
| 103 // Print fields. | |
| 104 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. | |
| 105 class FieldPrinter: public FieldClosure { | |
| 106 oop _obj; | |
| 107 outputStream* _st; | |
| 108 public: | |
| 109 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} | |
| 110 void do_field(fieldDescriptor* fd); | |
| 111 }; | |
| 112 #endif // !PRODUCT | |
| 113 | |
| 938 | 114 // ValueObjs embedded in klass. Describes where oops are located in instances of |
| 115 // this klass. | |
| 116 class OopMapBlock VALUE_OBJ_CLASS_SPEC { | |
| 117 public: | |
| 118 // Byte offset of the first oop mapped by this block. | |
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119 int offset() const { return _offset; } |
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120 void set_offset(int offset) { _offset = offset; } |
| 938 | 121 |
| 122 // Number of oops in this block. | |
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123 uint count() const { return _count; } |
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124 void set_count(uint count) { _count = count; } |
| 938 | 125 |
| 126 // sizeof(OopMapBlock) in HeapWords. | |
| 127 static const int size_in_words() { | |
| 128 return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >> | |
| 129 LogHeapWordSize; | |
| 130 } | |
| 131 | |
| 132 private: | |
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133 int _offset; |
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134 uint _count; |
| 938 | 135 }; |
| 136 | |
| 0 | 137 class instanceKlass: public Klass { |
| 138 friend class VMStructs; | |
| 139 public: | |
| 140 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description | |
| 141 // of the class loading & initialization procedure, and the use of the states. | |
| 142 enum ClassState { | |
| 143 unparsable_by_gc = 0, // object is not yet parsable by gc. Value of _init_state at object allocation. | |
| 144 allocated, // allocated (but not yet linked) | |
| 145 loaded, // loaded and inserted in class hierarchy (but not linked yet) | |
| 146 linked, // successfully linked/verified (but not initialized yet) | |
| 147 being_initialized, // currently running class initializer | |
| 148 fully_initialized, // initialized (successfull final state) | |
| 149 initialization_error // error happened during initialization | |
| 150 }; | |
| 151 | |
| 152 public: | |
| 153 oop* oop_block_beg() const { return adr_array_klasses(); } | |
| 154 oop* oop_block_end() const { return adr_methods_default_annotations() + 1; } | |
| 155 | |
| 156 enum { | |
| 157 implementors_limit = 2 // how many implems can we track? | |
| 158 }; | |
| 159 | |
| 160 protected: | |
| 161 // | |
| 162 // The oop block. See comment in klass.hpp before making changes. | |
| 163 // | |
| 164 | |
| 165 // Array classes holding elements of this class. | |
| 166 klassOop _array_klasses; | |
| 167 // Method array. | |
| 168 objArrayOop _methods; | |
| 169 // Int array containing the original order of method in the class file (for | |
| 170 // JVMTI). | |
| 171 typeArrayOop _method_ordering; | |
| 172 // Interface (klassOops) this class declares locally to implement. | |
| 173 objArrayOop _local_interfaces; | |
| 174 // Interface (klassOops) this class implements transitively. | |
| 175 objArrayOop _transitive_interfaces; | |
| 176 // Instance and static variable information, 5-tuples of shorts [access, name | |
| 177 // index, sig index, initval index, offset]. | |
| 178 typeArrayOop _fields; | |
| 179 // Constant pool for this class. | |
| 180 constantPoolOop _constants; | |
| 181 // Class loader used to load this class, NULL if VM loader used. | |
| 182 oop _class_loader; | |
| 183 // Protection domain. | |
| 184 oop _protection_domain; | |
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185 // Host class, which grants its access privileges to this class also. |
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186 // This is only non-null for an anonymous class (JSR 292 enabled). |
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187 // The host class is either named, or a previously loaded anonymous class. |
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188 klassOop _host_klass; |
| 0 | 189 // Class signers. |
| 190 objArrayOop _signers; | |
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191 // The InnerClasses attribute and EnclosingMethod attribute. The |
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192 // _inner_classes is an array of shorts. If the class has InnerClasses |
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193 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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194 // [inner_class_info_index, outer_class_info_index, |
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195 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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196 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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197 // last two shorts [class_index, method_index] of the array. If only |
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198 // the InnerClasses attribute exists, the _inner_classes array length is |
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199 // number_of_inner_classes * 4. If the class has both InnerClasses |
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200 // and EnclosingMethod attributes the _inner_classes array length is |
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201 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
| 0 | 202 typeArrayOop _inner_classes; |
| 203 // Implementors of this interface (not valid if it overflows) | |
| 204 klassOop _implementors[implementors_limit]; | |
| 205 // Annotations for this class, or null if none. | |
| 206 typeArrayOop _class_annotations; | |
| 207 // Annotation objects (byte arrays) for fields, or null if no annotations. | |
| 208 // Indices correspond to entries (not indices) in fields array. | |
| 209 objArrayOop _fields_annotations; | |
| 210 // Annotation objects (byte arrays) for methods, or null if no annotations. | |
| 211 // Index is the idnum, which is initially the same as the methods array index. | |
| 212 objArrayOop _methods_annotations; | |
| 213 // Annotation objects (byte arrays) for methods' parameters, or null if no | |
| 214 // such annotations. | |
| 215 // Index is the idnum, which is initially the same as the methods array index. | |
| 216 objArrayOop _methods_parameter_annotations; | |
| 217 // Annotation objects (byte arrays) for methods' default values, or null if no | |
| 218 // such annotations. | |
| 219 // Index is the idnum, which is initially the same as the methods array index. | |
| 220 objArrayOop _methods_default_annotations; | |
| 221 | |
| 222 // | |
| 223 // End of the oop block. | |
| 224 // | |
| 225 | |
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226 // Name of source file containing this klass, NULL if not specified. |
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227 Symbol* _source_file_name; |
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228 // the source debug extension for this klass, NULL if not specified. |
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229 Symbol* _source_debug_extension; |
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230 // Generic signature, or null if none. |
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231 Symbol* _generic_signature; |
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232 // Array name derived from this class which needs unreferencing |
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233 // if this class is unloaded. |
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234 Symbol* _array_name; |
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235 |
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236 // Number of heapOopSize words used by non-static fields in this klass |
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237 // (including inherited fields but after header_size()). |
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238 int _nonstatic_field_size; |
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239 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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240 u2 _static_oop_field_count;// number of static oop fields in this klass |
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241 u2 _java_fields_count; // The number of declared Java fields |
| 938 | 242 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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243 |
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244 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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245 bool _rewritten; // methods rewritten. |
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246 bool _has_nonstatic_fields; // for sizing with UseCompressedOops |
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247 bool _should_verify_class; // allow caching of preverification |
| 0 | 248 u2 _minor_version; // minor version number of class file |
| 249 u2 _major_version; // major version number of class file | |
| 250 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
| 251 int _vtable_len; // length of Java vtable (in words) | |
| 252 int _itable_len; // length of Java itable (in words) | |
| 253 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
| 254 JNIid* _jni_ids; // First JNI identifier for static fields in this class | |
| 255 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
| 256 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
| 257 nmethodBucket* _dependencies; // list of dependent nmethods | |
| 258 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
| 259 BreakpointInfo* _breakpoints; // bpt lists, managed by methodOop | |
| 260 int _nof_implementors; // No of implementors of this interface (zero if not an interface) | |
| 261 // Array of interesting part(s) of the previous version(s) of this | |
| 262 // instanceKlass. See PreviousVersionWalker below. | |
| 263 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
| 264 // JVMTI fields can be moved to their own structure - see 6315920 | |
| 265 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
| 266 jint _cached_class_file_len; // JVMTI: length of above | |
| 267 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration | |
| 268 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change | |
| 269 | |
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270 // Class states are defined as ClassState (see above). |
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271 // Place the _init_state here to utilize the unused 2-byte after |
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272 // _idnum_allocated_count. |
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273 u1 _init_state; // state of class |
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274 |
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275 u1 _reference_type; // reference type |
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276 |
| 0 | 277 // embedded Java vtable follows here |
| 278 // embedded Java itables follows here | |
| 279 // embedded static fields follows here | |
| 280 // embedded nonstatic oop-map blocks follows here | |
| 281 | |
| 282 friend class instanceKlassKlass; | |
| 283 friend class SystemDictionary; | |
| 284 | |
| 285 public: | |
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286 bool has_nonstatic_fields() const { return _has_nonstatic_fields; } |
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287 void set_has_nonstatic_fields(bool b) { _has_nonstatic_fields = b; } |
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288 |
| 0 | 289 // field sizes |
| 290 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
| 291 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
| 292 | |
| 293 int static_field_size() const { return _static_field_size; } | |
| 294 void set_static_field_size(int size) { _static_field_size = size; } | |
| 295 | |
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296 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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297 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
| 0 | 298 |
| 299 // Java vtable | |
| 300 int vtable_length() const { return _vtable_len; } | |
| 301 void set_vtable_length(int len) { _vtable_len = len; } | |
| 302 | |
| 303 // Java itable | |
| 304 int itable_length() const { return _itable_len; } | |
| 305 void set_itable_length(int len) { _itable_len = len; } | |
| 306 | |
| 307 // array klasses | |
| 308 klassOop array_klasses() const { return _array_klasses; } | |
| 309 void set_array_klasses(klassOop k) { oop_store_without_check((oop*) &_array_klasses, (oop) k); } | |
| 310 | |
| 311 // methods | |
| 312 objArrayOop methods() const { return _methods; } | |
| 313 void set_methods(objArrayOop a) { oop_store_without_check((oop*) &_methods, (oop) a); } | |
| 314 methodOop method_with_idnum(int idnum); | |
| 315 | |
| 316 // method ordering | |
| 317 typeArrayOop method_ordering() const { return _method_ordering; } | |
| 318 void set_method_ordering(typeArrayOop m) { oop_store_without_check((oop*) &_method_ordering, (oop) m); } | |
| 319 | |
| 320 // interfaces | |
| 321 objArrayOop local_interfaces() const { return _local_interfaces; } | |
| 322 void set_local_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_local_interfaces, (oop) a); } | |
| 323 objArrayOop transitive_interfaces() const { return _transitive_interfaces; } | |
| 324 void set_transitive_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_transitive_interfaces, (oop) a); } | |
| 325 | |
| 3938 | 326 private: |
| 327 friend class fieldDescriptor; | |
| 328 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
| 329 | |
| 330 public: | |
| 331 int field_offset (int index) const { return field(index)->offset(); } | |
| 332 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
| 333 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
| 334 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
| 335 | |
| 336 // Number of Java declared fields | |
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337 int java_fields_count() const { return (int)_java_fields_count; } |
| 3938 | 338 |
| 339 // Number of fields including any injected fields | |
| 340 int all_fields_count() const { return _fields->length() / sizeof(FieldInfo::field_slots); } | |
| 0 | 341 |
| 342 typeArrayOop fields() const { return _fields; } | |
| 3938 | 343 |
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344 void set_fields(typeArrayOop f, u2 java_fields_count) { |
| 3938 | 345 oop_store_without_check((oop*) &_fields, (oop) f); |
| 346 _java_fields_count = java_fields_count; | |
| 0 | 347 } |
| 348 | |
| 349 // inner classes | |
| 350 typeArrayOop inner_classes() const { return _inner_classes; } | |
| 351 void set_inner_classes(typeArrayOop f) { oop_store_without_check((oop*) &_inner_classes, (oop) f); } | |
| 352 | |
| 353 enum InnerClassAttributeOffset { | |
| 354 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
| 355 inner_class_inner_class_info_offset = 0, | |
| 356 inner_class_outer_class_info_offset = 1, | |
| 357 inner_class_inner_name_offset = 2, | |
| 358 inner_class_access_flags_offset = 3, | |
| 359 inner_class_next_offset = 4 | |
| 360 }; | |
| 361 | |
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362 enum EnclosingMethodAttributeOffset { |
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363 enclosing_method_class_index_offset = 0, |
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364 enclosing_method_method_index_offset = 1, |
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365 enclosing_method_attribute_size = 2 |
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366 }; |
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367 |
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368 // method override check |
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369 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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370 |
| 0 | 371 // package |
| 372 bool is_same_class_package(klassOop class2); | |
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373 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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374 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
| 0 | 375 |
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376 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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377 klassOop compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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378 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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379 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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380 } |
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381 static klassOop compute_enclosing_class_impl(instanceKlassHandle self, |
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382 bool* inner_is_member, TRAPS); |
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383 |
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384 // tell if two classes have the same enclosing class (at package level) |
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385 bool is_same_package_member(klassOop class2, TRAPS) { |
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386 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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387 return is_same_package_member_impl(self, class2, THREAD); |
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388 } |
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389 static bool is_same_package_member_impl(instanceKlassHandle self, |
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390 klassOop class2, TRAPS); |
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391 |
| 0 | 392 // initialization state |
| 393 bool is_loaded() const { return _init_state >= loaded; } | |
| 394 bool is_linked() const { return _init_state >= linked; } | |
| 395 bool is_initialized() const { return _init_state == fully_initialized; } | |
| 396 bool is_not_initialized() const { return _init_state < being_initialized; } | |
| 397 bool is_being_initialized() const { return _init_state == being_initialized; } | |
| 398 bool is_in_error_state() const { return _init_state == initialization_error; } | |
| 399 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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400 ClassState init_state() { return (ClassState)_init_state; } |
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401 bool is_rewritten() const { return _rewritten; } |
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402 |
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403 // defineClass specified verification |
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404 bool should_verify_class() const { return _should_verify_class; } |
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405 void set_should_verify_class(bool value) { _should_verify_class = value; } |
| 0 | 406 |
| 407 // marking | |
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408 bool is_marked_dependent() const { return _is_marked_dependent; } |
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409 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
| 0 | 410 |
| 411 // initialization (virtuals from Klass) | |
| 412 bool should_be_initialized() const; // means that initialize should be called | |
| 413 void initialize(TRAPS); | |
| 414 void link_class(TRAPS); | |
| 415 bool link_class_or_fail(TRAPS); // returns false on failure | |
| 416 void unlink_class(); | |
| 417 void rewrite_class(TRAPS); | |
| 3748 | 418 void relocate_and_link_methods(TRAPS); |
| 0 | 419 methodOop class_initializer(); |
| 420 | |
| 421 // set the class to initialized if no static initializer is present | |
| 422 void eager_initialize(Thread *thread); | |
| 423 | |
| 424 // reference type | |
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425 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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426 void set_reference_type(ReferenceType t) { |
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427 assert(t == (u1)t, "overflow"); |
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428 _reference_type = (u1)t; |
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429 } |
| 0 | 430 |
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431 static ByteSize reference_type_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _reference_type)); } |
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432 |
| 0 | 433 // find local field, returns true if found |
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434 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 435 // find field in direct superinterfaces, returns the interface in which the field is defined |
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436 klassOop find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 437 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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438 klassOop find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 439 // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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440 klassOop find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
| 0 | 441 |
| 442 // find a non-static or static field given its offset within the class. | |
| 443 bool contains_field_offset(int offset) { | |
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444 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
| 0 | 445 } |
| 446 | |
| 447 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
| 448 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
| 449 | |
| 450 // find a local method (returns NULL if not found) | |
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451 methodOop find_method(Symbol* name, Symbol* signature) const; |
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452 static methodOop find_method(objArrayOop methods, Symbol* name, Symbol* signature); |
| 0 | 453 |
| 454 // lookup operation (returns NULL if not found) | |
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455 methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const; |
| 0 | 456 |
| 457 // lookup a method in all the interfaces that this class implements | |
| 458 // (returns NULL if not found) | |
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459 methodOop lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
| 0 | 460 |
| 461 // constant pool | |
| 462 constantPoolOop constants() const { return _constants; } | |
| 463 void set_constants(constantPoolOop c) { oop_store_without_check((oop*) &_constants, (oop) c); } | |
| 464 | |
| 465 // class loader | |
| 466 oop class_loader() const { return _class_loader; } | |
| 467 void set_class_loader(oop l) { oop_store((oop*) &_class_loader, l); } | |
| 468 | |
| 469 // protection domain | |
| 470 oop protection_domain() { return _protection_domain; } | |
| 471 void set_protection_domain(oop pd) { oop_store((oop*) &_protection_domain, pd); } | |
| 472 | |
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473 // host class |
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474 oop host_klass() const { return _host_klass; } |
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475 void set_host_klass(oop host) { oop_store((oop*) &_host_klass, host); } |
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476 bool is_anonymous() const { return _host_klass != NULL; } |
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477 |
| 0 | 478 // signers |
| 479 objArrayOop signers() const { return _signers; } | |
| 480 void set_signers(objArrayOop s) { oop_store((oop*) &_signers, oop(s)); } | |
| 481 | |
| 482 // source file name | |
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483 Symbol* source_file_name() const { return _source_file_name; } |
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484 void set_source_file_name(Symbol* n); |
| 0 | 485 |
| 486 // minor and major version numbers of class file | |
| 487 u2 minor_version() const { return _minor_version; } | |
| 488 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
| 489 u2 major_version() const { return _major_version; } | |
| 490 void set_major_version(u2 major_version) { _major_version = major_version; } | |
| 491 | |
| 492 // source debug extension | |
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493 Symbol* source_debug_extension() const { return _source_debug_extension; } |
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494 void set_source_debug_extension(Symbol* n); |
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495 |
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496 // symbol unloading support (refcount already added) |
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497 Symbol* array_name() { return _array_name; } |
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498 void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; } |
| 0 | 499 |
| 500 // nonstatic oop-map blocks | |
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501 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
| 938 | 502 return oop_map_count * OopMapBlock::size_in_words(); |
| 503 } | |
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504 unsigned int nonstatic_oop_map_count() const { |
| 938 | 505 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
| 506 } | |
| 507 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
| 508 void set_nonstatic_oop_map_size(int words) { | |
| 509 _nonstatic_oop_map_size = words; | |
| 510 } | |
| 0 | 511 |
| 512 // RedefineClasses() support for previous versions: | |
| 513 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
| 514 int emcp_method_count); | |
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515 // If the _previous_versions array is non-NULL, then this klass |
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516 // has been redefined at least once even if we aren't currently |
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517 // tracking a previous version. |
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518 bool has_been_redefined() const { return _previous_versions != NULL; } |
| 0 | 519 bool has_previous_version() const; |
| 520 void init_previous_versions() { | |
| 521 _previous_versions = NULL; | |
| 522 } | |
| 523 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
| 524 return _previous_versions; | |
| 525 } | |
| 526 | |
| 527 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation | |
| 528 void set_cached_class_file(unsigned char *class_file_bytes, | |
| 529 jint class_file_len) { _cached_class_file_len = class_file_len; | |
| 530 _cached_class_file_bytes = class_file_bytes; } | |
| 531 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
| 532 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
| 533 | |
| 534 // JVMTI: Support for caching of field indices, types, and offsets | |
| 535 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
| 536 _jvmti_cached_class_field_map = descriptor; | |
| 537 } | |
| 538 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
| 539 return _jvmti_cached_class_field_map; | |
| 540 } | |
| 541 | |
| 542 // for adding methods, constMethodOopDesc::UNSET_IDNUM means no more ids available | |
| 543 inline u2 next_method_idnum(); | |
| 544 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
| 545 | |
| 546 // generics support | |
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547 Symbol* generic_signature() const { return _generic_signature; } |
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548 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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549 |
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550 u2 enclosing_method_data(int offset); |
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551 u2 enclosing_method_class_index() { |
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552 return enclosing_method_data(enclosing_method_class_index_offset); |
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553 } |
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554 u2 enclosing_method_method_index() { |
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555 return enclosing_method_data(enclosing_method_method_index_offset); |
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556 } |
| 0 | 557 void set_enclosing_method_indices(u2 class_index, |
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558 u2 method_index); |
| 0 | 559 |
| 560 // jmethodID support | |
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561 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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562 methodHandle method_h); |
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563 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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564 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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565 jmethodID* to_dealloc_id_p, |
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566 jmethodID** to_dealloc_jmeths_p); |
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567 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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568 size_t *length_p, jmethodID* id_p); |
| 0 | 569 jmethodID jmethod_id_or_null(methodOop method); |
| 570 | |
| 571 // cached itable index support | |
| 572 void set_cached_itable_index(size_t idnum, int index); | |
| 573 int cached_itable_index(size_t idnum); | |
| 574 | |
| 575 // annotations support | |
| 576 typeArrayOop class_annotations() const { return _class_annotations; } | |
| 577 objArrayOop fields_annotations() const { return _fields_annotations; } | |
| 578 objArrayOop methods_annotations() const { return _methods_annotations; } | |
| 579 objArrayOop methods_parameter_annotations() const { return _methods_parameter_annotations; } | |
| 580 objArrayOop methods_default_annotations() const { return _methods_default_annotations; } | |
| 581 void set_class_annotations(typeArrayOop md) { oop_store_without_check((oop*)&_class_annotations, (oop)md); } | |
| 582 void set_fields_annotations(objArrayOop md) { set_annotations(md, &_fields_annotations); } | |
| 583 void set_methods_annotations(objArrayOop md) { set_annotations(md, &_methods_annotations); } | |
| 584 void set_methods_parameter_annotations(objArrayOop md) { set_annotations(md, &_methods_parameter_annotations); } | |
| 585 void set_methods_default_annotations(objArrayOop md) { set_annotations(md, &_methods_default_annotations); } | |
| 586 typeArrayOop get_method_annotations_of(int idnum) | |
| 587 { return get_method_annotations_from(idnum, _methods_annotations); } | |
| 588 typeArrayOop get_method_parameter_annotations_of(int idnum) | |
| 589 { return get_method_annotations_from(idnum, _methods_parameter_annotations); } | |
| 590 typeArrayOop get_method_default_annotations_of(int idnum) | |
| 591 { return get_method_annotations_from(idnum, _methods_default_annotations); } | |
| 592 void set_method_annotations_of(int idnum, typeArrayOop anno) | |
| 593 { set_methods_annotations_of(idnum, anno, &_methods_annotations); } | |
| 594 void set_method_parameter_annotations_of(int idnum, typeArrayOop anno) | |
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595 { set_methods_annotations_of(idnum, anno, &_methods_parameter_annotations); } |
| 0 | 596 void set_method_default_annotations_of(int idnum, typeArrayOop anno) |
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597 { set_methods_annotations_of(idnum, anno, &_methods_default_annotations); } |
| 0 | 598 |
| 599 // allocation | |
| 600 DEFINE_ALLOCATE_PERMANENT(instanceKlass); | |
| 601 instanceOop allocate_instance(TRAPS); | |
| 602 instanceOop allocate_permanent_instance(TRAPS); | |
| 603 | |
| 604 // additional member function to return a handle | |
| 605 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
| 606 | |
| 607 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
| 608 // Helper function | |
| 609 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
| 610 | |
| 611 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
| 612 // if not, throw either an Error or an Exception. | |
| 613 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
| 614 | |
| 615 // initialization | |
| 616 void call_class_initializer(TRAPS); | |
| 617 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
| 618 | |
| 619 // OopMapCache support | |
| 620 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
| 621 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
| 622 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
| 623 | |
| 624 // JNI identifier support (for static fields - for jni performance) | |
| 625 JNIid* jni_ids() { return _jni_ids; } | |
| 626 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
| 627 JNIid* jni_id_for(int offset); | |
| 628 | |
| 629 // maintenance of deoptimization dependencies | |
| 630 int mark_dependent_nmethods(DepChange& changes); | |
| 631 void add_dependent_nmethod(nmethod* nm); | |
| 632 void remove_dependent_nmethod(nmethod* nm); | |
| 633 | |
| 634 // On-stack replacement support | |
| 635 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
| 636 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
| 637 void add_osr_nmethod(nmethod* n); | |
| 638 void remove_osr_nmethod(nmethod* n); | |
| 1783 | 639 nmethod* lookup_osr_nmethod(const methodOop m, int bci, int level, bool match_level) const; |
| 0 | 640 |
| 641 // Breakpoint support (see methods on methodOop for details) | |
| 642 BreakpointInfo* breakpoints() const { return _breakpoints; }; | |
| 643 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
| 644 | |
| 645 // support for stub routines | |
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646 static ByteSize init_state_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_state)); } |
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647 static ByteSize init_thread_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_thread)); } |
| 0 | 648 |
| 649 // subclass/subinterface checks | |
| 650 bool implements_interface(klassOop k) const; | |
| 651 | |
| 652 // Access to implementors of an interface. We only store the count | |
| 653 // of implementors, and in case, there are only a few | |
| 654 // implementors, we store them in a short list. | |
| 655 // This accessor returns NULL if we walk off the end of the list. | |
| 656 klassOop implementor(int i) const { | |
| 657 return (i < implementors_limit)? _implementors[i]: (klassOop) NULL; | |
| 658 } | |
| 659 int nof_implementors() const { return _nof_implementors; } | |
| 660 void add_implementor(klassOop k); // k is a new class that implements this interface | |
| 661 void init_implementor(); // initialize | |
| 662 | |
| 663 // link this class into the implementors list of every interface it implements | |
| 664 void process_interfaces(Thread *thread); | |
| 665 | |
| 666 // virtual operations from Klass | |
| 667 bool is_leaf_class() const { return _subklass == NULL; } | |
| 668 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); | |
| 669 bool compute_is_subtype_of(klassOop k); | |
| 670 bool can_be_primary_super_slow() const; | |
| 671 klassOop java_super() const { return super(); } | |
| 672 int oop_size(oop obj) const { return size_helper(); } | |
| 673 int klass_oop_size() const { return object_size(); } | |
| 674 bool oop_is_instance_slow() const { return true; } | |
| 675 | |
| 676 // Iterators | |
| 677 void do_local_static_fields(FieldClosure* cl); | |
| 678 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
| 679 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
| 680 | |
| 681 void methods_do(void f(methodOop method)); | |
| 682 void array_klasses_do(void f(klassOop k)); | |
| 683 void with_array_klasses_do(void f(klassOop k)); | |
| 684 bool super_types_do(SuperTypeClosure* blk); | |
| 685 | |
| 686 // Casting from klassOop | |
| 687 static instanceKlass* cast(klassOop k) { | |
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688 assert(k->is_klass(), "must be"); |
| 0 | 689 Klass* kp = k->klass_part(); |
| 690 assert(kp->null_vtbl() || kp->oop_is_instance_slow(), "cast to instanceKlass"); | |
| 691 return (instanceKlass*) kp; | |
| 692 } | |
| 693 | |
| 694 // Sizing (in words) | |
| 695 static int header_size() { return align_object_offset(oopDesc::header_size() + sizeof(instanceKlass)/HeapWordSize); } | |
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696 int object_size() const { return object_size(align_object_offset(vtable_length()) + align_object_offset(itable_length()) + nonstatic_oop_map_size()); } |
| 0 | 697 static int vtable_start_offset() { return header_size(); } |
| 698 static int vtable_length_offset() { return oopDesc::header_size() + offset_of(instanceKlass, _vtable_len) / HeapWordSize; } | |
| 699 static int object_size(int extra) { return align_object_size(header_size() + extra); } | |
| 700 | |
| 701 intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); } | |
| 702 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } | |
| 703 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); } | |
| 704 | |
| 705 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
| 706 | |
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707 address static_field_addr(int offset); |
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708 |
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709 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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710 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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711 } |
| 0 | 712 |
| 713 // Allocation profiling support | |
| 714 juint alloc_size() const { return _alloc_count * size_helper(); } | |
| 715 void set_alloc_size(juint n) {} | |
| 716 | |
| 717 // Use this to return the size of an instance in heap words: | |
| 718 int size_helper() const { | |
| 719 return layout_helper_to_size_helper(layout_helper()); | |
| 720 } | |
| 721 | |
| 722 // This bit is initialized in classFileParser.cpp. | |
| 723 // It is false under any of the following conditions: | |
| 724 // - the class is abstract (including any interface) | |
| 725 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
| 726 // - the class size is larger than FastAllocateSizeLimit | |
| 727 // - the class is java/lang/Class, which cannot be allocated directly | |
| 728 bool can_be_fastpath_allocated() const { | |
| 729 return !layout_helper_needs_slow_path(layout_helper()); | |
| 730 } | |
| 731 | |
| 732 // Java vtable/itable | |
| 733 klassVtable* vtable() const; // return new klassVtable wrapper | |
| 734 inline methodOop method_at_vtable(int index); | |
| 735 klassItable* itable() const; // return new klassItable wrapper | |
| 736 methodOop method_at_itable(klassOop holder, int index, TRAPS); | |
| 737 | |
| 738 // Garbage collection | |
| 739 void oop_follow_contents(oop obj); | |
| 740 int oop_adjust_pointers(oop obj); | |
| 741 bool object_is_parsable() const { return _init_state != unparsable_by_gc; } | |
| 742 // Value of _init_state must be zero (unparsable_by_gc) when klass field is set. | |
| 743 | |
| 744 void follow_weak_klass_links( | |
| 745 BoolObjectClosure* is_alive, OopClosure* keep_alive); | |
| 746 void release_C_heap_structures(); | |
| 747 | |
| 748 // Parallel Scavenge and Parallel Old | |
| 749 PARALLEL_GC_DECLS | |
| 750 | |
| 751 // Naming | |
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752 const char* signature_name() const; |
| 0 | 753 |
| 754 // Iterators | |
| 755 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 756 return oop_oop_iterate_v(obj, blk); | |
| 757 } | |
| 758 | |
| 759 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 760 return oop_oop_iterate_v_m(obj, blk, mr); | |
| 761 } | |
| 762 | |
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763 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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764 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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765 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
| 0 | 766 MemRegion mr); |
| 767 | |
| 768 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
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769 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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770 |
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771 #ifndef SERIALGC |
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772 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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773 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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774 |
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775 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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776 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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777 #endif // !SERIALGC |
| 0 | 778 |
| 779 private: | |
| 780 // initialization state | |
| 781 #ifdef ASSERT | |
| 782 void set_init_state(ClassState state); | |
| 783 #else | |
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784 void set_init_state(ClassState state) { _init_state = (u1)state; } |
| 0 | 785 #endif |
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786 void set_rewritten() { _rewritten = true; } |
| 0 | 787 void set_init_thread(Thread *thread) { _init_thread = thread; } |
| 788 | |
| 789 u2 idnum_allocated_count() const { return _idnum_allocated_count; } | |
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790 // The RedefineClasses() API can cause new method idnums to be needed |
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791 // which will cause the caches to grow. Safety requires different |
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792 // cache management logic if the caches can grow instead of just |
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793 // going from NULL to non-NULL. |
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794 bool idnum_can_increment() const { return has_been_redefined(); } |
| 0 | 795 jmethodID* methods_jmethod_ids_acquire() const |
| 796 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
| 797 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
| 798 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
| 799 | |
| 800 int* methods_cached_itable_indices_acquire() const | |
| 801 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
| 802 void release_set_methods_cached_itable_indices(int* indices) | |
| 803 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
| 804 | |
| 805 inline typeArrayOop get_method_annotations_from(int idnum, objArrayOop annos); | |
| 806 void set_annotations(objArrayOop md, objArrayOop* md_p) { oop_store_without_check((oop*)md_p, (oop)md); } | |
| 807 void set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p); | |
| 808 | |
| 809 // Offsets for memory management | |
| 810 oop* adr_array_klasses() const { return (oop*)&this->_array_klasses;} | |
| 811 oop* adr_methods() const { return (oop*)&this->_methods;} | |
| 812 oop* adr_method_ordering() const { return (oop*)&this->_method_ordering;} | |
| 813 oop* adr_local_interfaces() const { return (oop*)&this->_local_interfaces;} | |
| 814 oop* adr_transitive_interfaces() const { return (oop*)&this->_transitive_interfaces;} | |
| 815 oop* adr_fields() const { return (oop*)&this->_fields;} | |
| 816 oop* adr_constants() const { return (oop*)&this->_constants;} | |
| 817 oop* adr_class_loader() const { return (oop*)&this->_class_loader;} | |
| 818 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
|
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819 oop* adr_host_klass() const { return (oop*)&this->_host_klass;} |
| 0 | 820 oop* adr_signers() const { return (oop*)&this->_signers;} |
| 821 oop* adr_inner_classes() const { return (oop*)&this->_inner_classes;} | |
| 822 oop* adr_implementors() const { return (oop*)&this->_implementors[0];} | |
| 823 oop* adr_methods_jmethod_ids() const { return (oop*)&this->_methods_jmethod_ids;} | |
| 824 oop* adr_methods_cached_itable_indices() const { return (oop*)&this->_methods_cached_itable_indices;} | |
| 825 oop* adr_class_annotations() const { return (oop*)&this->_class_annotations;} | |
| 826 oop* adr_fields_annotations() const { return (oop*)&this->_fields_annotations;} | |
| 827 oop* adr_methods_annotations() const { return (oop*)&this->_methods_annotations;} | |
| 828 oop* adr_methods_parameter_annotations() const { return (oop*)&this->_methods_parameter_annotations;} | |
| 829 oop* adr_methods_default_annotations() const { return (oop*)&this->_methods_default_annotations;} | |
| 830 | |
| 831 // Static methods that are used to implement member methods where an exposed this pointer | |
| 832 // is needed due to possible GCs | |
| 833 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
| 834 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
| 835 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
| 836 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
| 837 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
| 838 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
| 839 static klassOop array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); | |
| 840 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); | |
| 841 /* jni_id_for_impl for jfieldID only */ | |
| 842 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
| 843 | |
| 844 // Returns the array class for the n'th dimension | |
| 845 klassOop array_klass_impl(bool or_null, int n, TRAPS); | |
| 846 | |
| 847 // Returns the array class with this class as element type | |
| 848 klassOop array_klass_impl(bool or_null, TRAPS); | |
| 849 | |
| 850 public: | |
| 851 // sharing support | |
| 852 virtual void remove_unshareable_info(); | |
|
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853 virtual void shared_symbols_iterate(SymbolClosure* closure); |
| 0 | 854 |
| 855 // jvm support | |
| 856 jint compute_modifier_flags(TRAPS) const; | |
| 857 | |
| 858 public: | |
| 859 // JVMTI support | |
| 860 jint jvmti_class_status() const; | |
| 861 | |
| 862 public: | |
| 863 // Printing | |
|
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864 void oop_print_value_on(oop obj, outputStream* st); |
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865 #ifndef PRODUCT |
| 0 | 866 void oop_print_on (oop obj, outputStream* st); |
| 867 | |
| 868 void print_dependent_nmethods(bool verbose = false); | |
| 869 bool is_dependent_nmethod(nmethod* nm); | |
| 870 #endif | |
| 871 | |
| 872 // Verification | |
| 873 const char* internal_name() const; | |
| 874 void oop_verify_on(oop obj, outputStream* st); | |
| 875 }; | |
| 876 | |
| 877 inline methodOop instanceKlass::method_at_vtable(int index) { | |
| 878 #ifndef PRODUCT | |
| 879 assert(index >= 0, "valid vtable index"); | |
| 880 if (DebugVtables) { | |
| 881 verify_vtable_index(index); | |
| 882 } | |
| 883 #endif | |
| 884 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
| 885 return ve[index].method(); | |
| 886 } | |
| 887 | |
| 888 inline typeArrayOop instanceKlass::get_method_annotations_from(int idnum, objArrayOop annos) { | |
| 889 if (annos == NULL || annos->length() <= idnum) { | |
| 890 return NULL; | |
| 891 } | |
| 892 return typeArrayOop(annos->obj_at(idnum)); | |
| 893 } | |
| 894 | |
| 895 // for adding methods | |
| 896 // UNSET_IDNUM return means no more ids available | |
| 897 inline u2 instanceKlass::next_method_idnum() { | |
| 898 if (_idnum_allocated_count == constMethodOopDesc::MAX_IDNUM) { | |
| 899 return constMethodOopDesc::UNSET_IDNUM; // no more ids available | |
| 900 } else { | |
| 901 return _idnum_allocated_count++; | |
| 902 } | |
| 903 } | |
| 904 | |
| 905 | |
| 906 /* JNIid class for jfieldIDs only */ | |
| 907 class JNIid: public CHeapObj { | |
| 908 friend class VMStructs; | |
| 909 private: | |
| 910 klassOop _holder; | |
| 911 JNIid* _next; | |
| 912 int _offset; | |
| 913 #ifdef ASSERT | |
| 914 bool _is_static_field_id; | |
| 915 #endif | |
| 916 | |
| 917 public: | |
| 918 // Accessors | |
| 919 klassOop holder() const { return _holder; } | |
| 920 int offset() const { return _offset; } | |
| 921 JNIid* next() { return _next; } | |
| 922 // Constructor | |
| 923 JNIid(klassOop holder, int offset, JNIid* next); | |
| 924 // Identifier lookup | |
| 925 JNIid* find(int offset); | |
| 926 | |
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927 bool find_local_field(fieldDescriptor* fd) { |
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928 return instanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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929 } |
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930 |
| 0 | 931 // Garbage collection support |
| 932 oop* holder_addr() { return (oop*)&_holder; } | |
| 933 void oops_do(OopClosure* f); | |
| 934 static void deallocate(JNIid* id); | |
| 935 // Debugging | |
| 936 #ifdef ASSERT | |
| 937 bool is_static_field_id() const { return _is_static_field_id; } | |
| 938 void set_is_static_field_id() { _is_static_field_id = true; } | |
| 939 #endif | |
| 940 void verify(klassOop holder); | |
| 941 }; | |
| 942 | |
| 943 | |
| 944 // If breakpoints are more numerous than just JVMTI breakpoints, | |
| 945 // consider compressing this data structure. | |
| 946 // It is currently a simple linked list defined in methodOop.hpp. | |
| 947 | |
| 948 class BreakpointInfo; | |
| 949 | |
| 950 | |
| 951 // A collection point for interesting information about the previous | |
| 952 // version(s) of an instanceKlass. This class uses weak references to | |
| 953 // the information so that the information may be collected as needed | |
|
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954 // by the system. If the information is shared, then a regular |
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955 // reference must be used because a weak reference would be seen as |
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956 // collectible. A GrowableArray of PreviousVersionNodes is attached |
| 0 | 957 // to the instanceKlass as needed. See PreviousVersionWalker below. |
| 958 class PreviousVersionNode : public CHeapObj { | |
| 959 private: | |
|
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960 // A shared ConstantPool is never collected so we'll always have |
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961 // a reference to it so we can update items in the cache. We'll |
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962 // have a weak reference to a non-shared ConstantPool until all |
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963 // of the methods (EMCP or obsolete) have been collected; the |
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964 // non-shared ConstantPool becomes collectible at that point. |
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965 jobject _prev_constant_pool; // regular or weak reference |
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966 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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967 |
| 0 | 968 // If the previous version of the instanceKlass doesn't have any |
| 969 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the | |
| 970 // EMCP methods have been collected, then _prev_EMCP_methods can | |
| 971 // have a length of zero. | |
| 972 GrowableArray<jweak>* _prev_EMCP_methods; | |
| 973 | |
| 974 public: | |
|
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975 PreviousVersionNode(jobject prev_constant_pool, bool prev_cp_is_weak, |
| 0 | 976 GrowableArray<jweak>* prev_EMCP_methods); |
| 977 ~PreviousVersionNode(); | |
|
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978 jobject prev_constant_pool() const { |
| 0 | 979 return _prev_constant_pool; |
| 980 } | |
| 981 GrowableArray<jweak>* prev_EMCP_methods() const { | |
| 982 return _prev_EMCP_methods; | |
| 983 } | |
| 984 }; | |
| 985 | |
| 986 | |
| 987 // A Handle-ized version of PreviousVersionNode. | |
| 988 class PreviousVersionInfo : public ResourceObj { | |
| 989 private: | |
| 990 constantPoolHandle _prev_constant_pool_handle; | |
| 991 // If the previous version of the instanceKlass doesn't have any | |
| 992 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the | |
| 993 // methods cannot be collected while we hold a handle, | |
| 994 // _prev_EMCP_methods should never have a length of zero. | |
| 995 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
| 996 | |
| 997 public: | |
| 998 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
| 999 ~PreviousVersionInfo(); | |
| 1000 constantPoolHandle prev_constant_pool_handle() const { | |
| 1001 return _prev_constant_pool_handle; | |
| 1002 } | |
| 1003 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
| 1004 return _prev_EMCP_method_handles; | |
| 1005 } | |
| 1006 }; | |
| 1007 | |
| 1008 | |
| 1009 // Helper object for walking previous versions. This helper cleans up | |
| 1010 // the Handles that it allocates when the helper object is destroyed. | |
| 1011 // The PreviousVersionInfo object returned by next_previous_version() | |
| 1012 // is only valid until a subsequent call to next_previous_version() or | |
| 1013 // the helper object is destroyed. | |
| 1014 class PreviousVersionWalker : public StackObj { | |
| 1015 private: | |
| 1016 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
| 1017 int _current_index; | |
| 1018 // Fields for cleaning up when we are done walking the previous versions: | |
| 1019 // A HandleMark for the PreviousVersionInfo handles: | |
| 1020 HandleMark _hm; | |
| 1021 | |
| 1022 // It would be nice to have a ResourceMark field in this helper also, | |
| 1023 // but the ResourceMark code says to be careful to delete handles held | |
| 1024 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
| 1025 // can't guarantee the order in which the fields are destroyed, we | |
| 1026 // have to let the creator of the PreviousVersionWalker object do | |
| 1027 // the right thing. Also, adding a ResourceMark here causes an | |
| 1028 // include loop. | |
| 1029 | |
| 1030 // A pointer to the current info object so we can handle the deletes. | |
| 1031 PreviousVersionInfo * _current_p; | |
| 1032 | |
| 1033 public: | |
| 1034 PreviousVersionWalker(instanceKlass *ik); | |
| 1035 ~PreviousVersionWalker(); | |
| 1036 | |
| 1037 // Return the interesting information for the next previous version | |
| 1038 // of the klass. Returns NULL if there are no more previous versions. | |
| 1039 PreviousVersionInfo* next_previous_version(); | |
| 1040 }; | |
| 1972 | 1041 |
| 3939 | 1042 |
| 1043 // | |
| 1044 // nmethodBucket is used to record dependent nmethods for | |
| 1045 // deoptimization. nmethod dependencies are actually <klass, method> | |
| 1046 // pairs but we really only care about the klass part for purposes of | |
| 1047 // finding nmethods which might need to be deoptimized. Instead of | |
| 1048 // recording the method, a count of how many times a particular nmethod | |
| 1049 // was recorded is kept. This ensures that any recording errors are | |
| 1050 // noticed since an nmethod should be removed as many times are it's | |
| 1051 // added. | |
| 1052 // | |
| 1053 class nmethodBucket: public CHeapObj { | |
| 1054 friend class VMStructs; | |
| 1055 private: | |
| 1056 nmethod* _nmethod; | |
| 1057 int _count; | |
| 1058 nmethodBucket* _next; | |
| 1059 | |
| 1060 public: | |
| 1061 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
| 1062 _nmethod = nmethod; | |
| 1063 _next = next; | |
| 1064 _count = 1; | |
| 1065 } | |
| 1066 int count() { return _count; } | |
| 1067 int increment() { _count += 1; return _count; } | |
| 1068 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
| 1069 nmethodBucket* next() { return _next; } | |
| 1070 void set_next(nmethodBucket* b) { _next = b; } | |
| 1071 nmethod* get_nmethod() { return _nmethod; } | |
| 1072 }; | |
| 1073 | |
|
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1074 // An iterator that's used to access the inner classes indices in the |
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1075 // instanceKlass::_inner_classes array. |
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1076 class InnerClassesIterator : public StackObj { |
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1077 private: |
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1078 typeArrayHandle _inner_classes; |
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1079 int _length; |
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1080 int _idx; |
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1081 public: |
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1082 |
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1083 InnerClassesIterator(instanceKlassHandle k) { |
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1084 _inner_classes = k->inner_classes(); |
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1085 if (k->inner_classes() != NULL) { |
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1086 _length = _inner_classes->length(); |
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1087 // The inner class array's length should be the multiple of |
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1088 // inner_class_next_offset if it only contains the InnerClasses |
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1089 // attribute data, or it should be |
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1090 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1091 // if it also contains the EnclosingMethod data. |
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1092 assert((_length % instanceKlass::inner_class_next_offset == 0 || |
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1093 _length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size), |
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1094 "just checking"); |
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1095 // Remove the enclosing_method portion if exists. |
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1096 if (_length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size) { |
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1097 _length -= instanceKlass::enclosing_method_attribute_size; |
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1098 } |
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1099 } else { |
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1100 _length = 0; |
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1101 } |
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1102 _idx = 0; |
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1103 } |
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1104 |
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1105 int length() const { |
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1106 return _length; |
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1107 } |
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1108 |
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1109 void next() { |
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1110 _idx += instanceKlass::inner_class_next_offset; |
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1111 } |
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1112 |
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1113 bool done() const { |
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1114 return (_idx >= _length); |
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1115 } |
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1116 |
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1117 u2 inner_class_info_index() const { |
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1118 return _inner_classes->ushort_at( |
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1119 _idx + instanceKlass::inner_class_inner_class_info_offset); |
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1120 } |
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1121 |
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1122 void set_inner_class_info_index(u2 index) { |
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1123 _inner_classes->ushort_at_put( |
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1124 _idx + instanceKlass::inner_class_inner_class_info_offset, index); |
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1125 } |
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1126 |
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1127 u2 outer_class_info_index() const { |
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1128 return _inner_classes->ushort_at( |
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1129 _idx + instanceKlass::inner_class_outer_class_info_offset); |
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1130 } |
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1131 |
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1132 void set_outer_class_info_index(u2 index) { |
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1133 _inner_classes->ushort_at_put( |
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1134 _idx + instanceKlass::inner_class_outer_class_info_offset, index); |
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1135 } |
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1136 |
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1137 u2 inner_name_index() const { |
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1138 return _inner_classes->ushort_at( |
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1139 _idx + instanceKlass::inner_class_inner_name_offset); |
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1140 } |
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1141 |
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1142 void set_inner_name_index(u2 index) { |
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1143 _inner_classes->ushort_at_put( |
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1144 _idx + instanceKlass::inner_class_inner_name_offset, index); |
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1145 } |
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1146 |
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1147 u2 inner_access_flags() const { |
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1148 return _inner_classes->ushort_at( |
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1149 _idx + instanceKlass::inner_class_access_flags_offset); |
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1150 } |
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1151 }; |
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1152 |
| 1972 | 1153 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |