Mercurial > hg > graal-compiler
annotate src/share/vm/oops/instanceKlass.hpp @ 6275:957c266d8bc5
Merge with http://hg.openjdk.java.net/hsx/hsx24/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Tue, 21 Aug 2012 10:39:19 +0200 |
| parents | 33df1aeaebbf 04ade88d9712 |
| children | dddcdb7ae209 |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_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 // [fields ] | |
| 60 // [constants ] | |
| 61 // [class loader ] | |
| 62 // [protection domain ] | |
| 63 // [signers ] | |
| 64 // [source file name ] | |
| 65 // [inner classes ] | |
| 66 // [static field size ] | |
| 67 // [nonstatic field size ] | |
| 68 // [static oop fields size ] | |
| 69 // [nonstatic oop maps size ] | |
| 70 // [has finalize method ] | |
| 71 // [deoptimization mark bit ] | |
| 72 // [initialization state ] | |
| 73 // [initializing thread ] | |
| 74 // [Java vtable length ] | |
| 75 // [oop map cache (stack maps) ] | |
| 76 // [EMBEDDED Java vtable ] size in words = vtable_len | |
| 77 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size | |
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78 // The embedded nonstatic oop-map blocks are short pairs (offset, length) |
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79 // indicating where oops are located in instances of this klass. |
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80 // [EMBEDDED implementor of the interface] only exist for interface |
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81 // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled) |
| 0 | 82 |
| 83 | |
| 84 // forward declaration for class -- see below for definition | |
| 85 class SuperTypeClosure; | |
| 86 class JNIid; | |
| 87 class jniIdMapBase; | |
| 88 class BreakpointInfo; | |
| 89 class fieldDescriptor; | |
| 90 class DepChange; | |
| 91 class nmethodBucket; | |
| 92 class PreviousVersionNode; | |
| 93 class JvmtiCachedClassFieldMap; | |
| 94 | |
| 95 // This is used in iterators below. | |
| 96 class FieldClosure: public StackObj { | |
| 97 public: | |
| 98 virtual void do_field(fieldDescriptor* fd) = 0; | |
| 99 }; | |
| 100 | |
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101 //#ifndef PRODUCT |
| 0 | 102 // Print fields. |
| 103 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. | |
| 104 class FieldPrinter: public FieldClosure { | |
| 105 oop _obj; | |
| 106 outputStream* _st; | |
| 107 public: | |
| 108 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} | |
| 109 void do_field(fieldDescriptor* fd); | |
| 110 }; | |
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111 //#endif // !PRODUCT |
| 0 | 112 |
| 938 | 113 // ValueObjs embedded in klass. Describes where oops are located in instances of |
| 114 // this klass. | |
| 115 class OopMapBlock VALUE_OBJ_CLASS_SPEC { | |
| 116 public: | |
| 117 // Byte offset of the first oop mapped by this block. | |
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118 int offset() const { return _offset; } |
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119 void set_offset(int offset) { _offset = offset; } |
| 938 | 120 |
| 121 // Number of oops in this block. | |
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122 uint count() const { return _count; } |
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123 void set_count(uint count) { _count = count; } |
| 938 | 124 |
| 125 // sizeof(OopMapBlock) in HeapWords. | |
| 126 static const int size_in_words() { | |
| 127 return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >> | |
| 128 LogHeapWordSize; | |
| 129 } | |
| 130 | |
| 131 private: | |
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132 int _offset; |
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133 uint _count; |
| 938 | 134 }; |
| 135 | |
| 0 | 136 class instanceKlass: public Klass { |
| 137 friend class VMStructs; | |
| 138 public: | |
| 139 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description | |
| 140 // of the class loading & initialization procedure, and the use of the states. | |
| 141 enum ClassState { | |
| 142 unparsable_by_gc = 0, // object is not yet parsable by gc. Value of _init_state at object allocation. | |
| 143 allocated, // allocated (but not yet linked) | |
| 144 loaded, // loaded and inserted in class hierarchy (but not linked yet) | |
| 145 linked, // successfully linked/verified (but not initialized yet) | |
| 146 being_initialized, // currently running class initializer | |
| 147 fully_initialized, // initialized (successfull final state) | |
| 148 initialization_error // error happened during initialization | |
| 149 }; | |
| 150 | |
| 151 public: | |
| 152 oop* oop_block_beg() const { return adr_array_klasses(); } | |
| 153 oop* oop_block_end() const { return adr_methods_default_annotations() + 1; } | |
| 154 | |
| 155 protected: | |
| 156 // | |
| 157 // The oop block. See comment in klass.hpp before making changes. | |
| 158 // | |
| 159 | |
| 160 // Array classes holding elements of this class. | |
| 161 klassOop _array_klasses; | |
| 162 // Method array. | |
| 163 objArrayOop _methods; | |
| 164 // Int array containing the original order of method in the class file (for | |
| 165 // JVMTI). | |
| 166 typeArrayOop _method_ordering; | |
| 167 // Interface (klassOops) this class declares locally to implement. | |
| 168 objArrayOop _local_interfaces; | |
| 169 // Interface (klassOops) this class implements transitively. | |
| 170 objArrayOop _transitive_interfaces; | |
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171 // Instance and static variable information, starts with 6-tuples of shorts |
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172 // [access, name index, sig index, initval index, low_offset, high_offset] |
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173 // for all fields, followed by the generic signature data at the end of |
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174 // the array. Only fields with generic signature attributes have the generic |
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175 // signature data set in the array. The fields array looks like following: |
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176 // |
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177 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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178 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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179 // ... |
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180 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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181 // [generic signature index] |
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182 // [generic signature index] |
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183 // ... |
| 0 | 184 typeArrayOop _fields; |
| 185 // Constant pool for this class. | |
| 186 constantPoolOop _constants; | |
| 187 // Class loader used to load this class, NULL if VM loader used. | |
| 188 oop _class_loader; | |
| 189 // Protection domain. | |
| 190 oop _protection_domain; | |
| 191 // Class signers. | |
| 192 objArrayOop _signers; | |
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193 // The InnerClasses attribute and EnclosingMethod attribute. The |
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194 // _inner_classes is an array of shorts. If the class has InnerClasses |
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195 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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196 // [inner_class_info_index, outer_class_info_index, |
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197 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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198 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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199 // last two shorts [class_index, method_index] of the array. If only |
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200 // the InnerClasses attribute exists, the _inner_classes array length is |
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201 // number_of_inner_classes * 4. If the class has both InnerClasses |
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202 // and EnclosingMethod attributes the _inner_classes array length is |
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203 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
| 0 | 204 typeArrayOop _inner_classes; |
| 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 // Specified as UTF-8 string without terminating zero byte in the classfile, |
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230 // it is stored in the instanceklass as a NULL-terminated UTF-8 string |
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231 char* _source_debug_extension; |
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232 // Generic signature, or null if none. |
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233 Symbol* _generic_signature; |
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234 // Array name derived from this class which needs unreferencing |
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235 // if this class is unloaded. |
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236 Symbol* _array_name; |
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237 |
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238 // Number of heapOopSize words used by non-static fields in this klass |
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239 // (including inherited fields but after header_size()). |
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240 int _nonstatic_field_size; |
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241 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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242 u2 _static_oop_field_count;// number of static oop fields in this klass |
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243 u2 _java_fields_count; // The number of declared Java fields |
| 938 | 244 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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245 |
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246 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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247 enum { |
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248 _misc_rewritten = 1 << 0, // methods rewritten. |
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249 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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250 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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251 _misc_is_anonymous = 1 << 3 // has embedded _inner_classes field |
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252 }; |
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253 u2 _misc_flags; |
| 0 | 254 u2 _minor_version; // minor version number of class file |
| 255 u2 _major_version; // major version number of class file | |
| 256 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
| 257 int _vtable_len; // length of Java vtable (in words) | |
| 258 int _itable_len; // length of Java itable (in words) | |
| 259 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
| 260 JNIid* _jni_ids; // First JNI identifier for static fields in this class | |
| 261 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
| 262 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
| 263 nmethodBucket* _dependencies; // list of dependent nmethods | |
| 264 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
| 265 BreakpointInfo* _breakpoints; // bpt lists, managed by methodOop | |
| 266 // Array of interesting part(s) of the previous version(s) of this | |
| 267 // instanceKlass. See PreviousVersionWalker below. | |
| 268 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
| 269 // JVMTI fields can be moved to their own structure - see 6315920 | |
| 270 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
| 271 jint _cached_class_file_len; // JVMTI: length of above | |
| 272 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration | |
| 273 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change | |
| 274 | |
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275 // Class states are defined as ClassState (see above). |
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276 // Place the _init_state here to utilize the unused 2-byte after |
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277 // _idnum_allocated_count. |
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278 u1 _init_state; // state of class |
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279 |
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280 u1 _reference_type; // reference type |
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281 |
| 0 | 282 // embedded Java vtable follows here |
| 283 // embedded Java itables follows here | |
| 284 // embedded static fields follows here | |
| 285 // embedded nonstatic oop-map blocks follows here | |
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286 // embedded implementor of this interface follows here |
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287 // The embedded implementor only exists if the current klass is an |
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288 // iterface. The possible values of the implementor fall into following |
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289 // three cases: |
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290 // NULL: no implementor. |
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291 // A klassOop that's not itself: one implementor. |
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292 // Itsef: more than one implementors. |
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293 // embedded host klass follows here |
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294 // The embedded host klass only exists in an anonymous class for |
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295 // dynamic language support (JSR 292 enabled). The host class grants |
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296 // its access privileges to this class also. The host class is either |
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297 // named, or a previously loaded anonymous class. A non-anonymous class |
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298 // or an anonymous class loaded through normal classloading does not |
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299 // have this embedded field. |
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300 // |
| 0 | 301 |
| 302 friend class instanceKlassKlass; | |
| 303 friend class SystemDictionary; | |
| 304 | |
| 305 public: | |
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306 bool has_nonstatic_fields() const { |
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307 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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308 } |
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309 void set_has_nonstatic_fields(bool b) { |
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310 if (b) { |
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311 _misc_flags |= _misc_has_nonstatic_fields; |
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312 } else { |
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313 _misc_flags &= ~_misc_has_nonstatic_fields; |
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314 } |
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315 } |
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316 |
| 0 | 317 // field sizes |
| 318 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
| 319 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
| 320 | |
| 321 int static_field_size() const { return _static_field_size; } | |
| 322 void set_static_field_size(int size) { _static_field_size = size; } | |
| 323 | |
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324 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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325 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
| 0 | 326 |
| 327 // Java vtable | |
| 328 int vtable_length() const { return _vtable_len; } | |
| 329 void set_vtable_length(int len) { _vtable_len = len; } | |
| 330 | |
| 331 // Java itable | |
| 332 int itable_length() const { return _itable_len; } | |
| 333 void set_itable_length(int len) { _itable_len = len; } | |
| 334 | |
| 335 // array klasses | |
| 336 klassOop array_klasses() const { return _array_klasses; } | |
| 337 void set_array_klasses(klassOop k) { oop_store_without_check((oop*) &_array_klasses, (oop) k); } | |
| 338 | |
| 339 // methods | |
| 340 objArrayOop methods() const { return _methods; } | |
| 341 void set_methods(objArrayOop a) { oop_store_without_check((oop*) &_methods, (oop) a); } | |
| 342 methodOop method_with_idnum(int idnum); | |
| 343 | |
| 344 // method ordering | |
| 345 typeArrayOop method_ordering() const { return _method_ordering; } | |
| 346 void set_method_ordering(typeArrayOop m) { oop_store_without_check((oop*) &_method_ordering, (oop) m); } | |
| 347 | |
| 348 // interfaces | |
| 349 objArrayOop local_interfaces() const { return _local_interfaces; } | |
| 350 void set_local_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_local_interfaces, (oop) a); } | |
| 351 objArrayOop transitive_interfaces() const { return _transitive_interfaces; } | |
| 352 void set_transitive_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_transitive_interfaces, (oop) a); } | |
| 353 | |
| 3938 | 354 private: |
| 355 friend class fieldDescriptor; | |
| 356 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
| 357 | |
| 358 public: | |
| 359 int field_offset (int index) const { return field(index)->offset(); } | |
| 360 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
| 361 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
| 362 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
| 363 | |
| 364 // Number of Java declared fields | |
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365 int java_fields_count() const { return (int)_java_fields_count; } |
| 3938 | 366 |
| 0 | 367 typeArrayOop fields() const { return _fields; } |
| 3938 | 368 |
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369 void set_fields(typeArrayOop f, u2 java_fields_count) { |
| 3938 | 370 oop_store_without_check((oop*) &_fields, (oop) f); |
| 371 _java_fields_count = java_fields_count; | |
| 0 | 372 } |
| 373 | |
| 374 // inner classes | |
| 375 typeArrayOop inner_classes() const { return _inner_classes; } | |
| 376 void set_inner_classes(typeArrayOop f) { oop_store_without_check((oop*) &_inner_classes, (oop) f); } | |
| 377 | |
| 378 enum InnerClassAttributeOffset { | |
| 379 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
| 380 inner_class_inner_class_info_offset = 0, | |
| 381 inner_class_outer_class_info_offset = 1, | |
| 382 inner_class_inner_name_offset = 2, | |
| 383 inner_class_access_flags_offset = 3, | |
| 384 inner_class_next_offset = 4 | |
| 385 }; | |
| 386 | |
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387 enum EnclosingMethodAttributeOffset { |
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388 enclosing_method_class_index_offset = 0, |
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389 enclosing_method_method_index_offset = 1, |
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390 enclosing_method_attribute_size = 2 |
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391 }; |
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392 |
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393 // method override check |
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394 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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395 |
| 0 | 396 // package |
| 397 bool is_same_class_package(klassOop class2); | |
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398 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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399 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
| 0 | 400 |
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401 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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402 klassOop compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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403 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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404 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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405 } |
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406 static klassOop compute_enclosing_class_impl(instanceKlassHandle self, |
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407 bool* inner_is_member, TRAPS); |
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408 |
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409 // tell if two classes have the same enclosing class (at package level) |
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410 bool is_same_package_member(klassOop class2, TRAPS) { |
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411 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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412 return is_same_package_member_impl(self, class2, THREAD); |
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413 } |
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414 static bool is_same_package_member_impl(instanceKlassHandle self, |
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415 klassOop class2, TRAPS); |
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416 |
| 0 | 417 // initialization state |
| 418 bool is_loaded() const { return _init_state >= loaded; } | |
| 419 bool is_linked() const { return _init_state >= linked; } | |
| 420 bool is_initialized() const { return _init_state == fully_initialized; } | |
| 421 bool is_not_initialized() const { return _init_state < being_initialized; } | |
| 422 bool is_being_initialized() const { return _init_state == being_initialized; } | |
| 423 bool is_in_error_state() const { return _init_state == initialization_error; } | |
| 424 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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425 ClassState init_state() { return (ClassState)_init_state; } |
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426 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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427 |
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428 // defineClass specified verification |
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429 bool should_verify_class() const { |
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430 return (_misc_flags & _misc_should_verify_class) != 0; |
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431 } |
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432 void set_should_verify_class(bool value) { |
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433 if (value) { |
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434 _misc_flags |= _misc_should_verify_class; |
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435 } else { |
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436 _misc_flags &= ~_misc_should_verify_class; |
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437 } |
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438 } |
| 0 | 439 |
| 440 // marking | |
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441 bool is_marked_dependent() const { return _is_marked_dependent; } |
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442 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
| 0 | 443 |
| 444 // initialization (virtuals from Klass) | |
| 445 bool should_be_initialized() const; // means that initialize should be called | |
| 446 void initialize(TRAPS); | |
| 447 void link_class(TRAPS); | |
| 448 bool link_class_or_fail(TRAPS); // returns false on failure | |
| 449 void unlink_class(); | |
| 450 void rewrite_class(TRAPS); | |
| 3404 | 451 void relocate_and_link_methods(TRAPS); |
| 0 | 452 methodOop class_initializer(); |
| 453 | |
| 454 // set the class to initialized if no static initializer is present | |
| 455 void eager_initialize(Thread *thread); | |
| 456 | |
| 457 // reference type | |
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458 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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459 void set_reference_type(ReferenceType t) { |
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460 assert(t == (u1)t, "overflow"); |
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461 _reference_type = (u1)t; |
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462 } |
| 0 | 463 |
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464 static ByteSize reference_type_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _reference_type)); } |
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465 |
| 0 | 466 // find local field, returns true if found |
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467 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 468 // find field in direct superinterfaces, returns the interface in which the field is defined |
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469 klassOop find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 470 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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471 klassOop find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 472 // 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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473 klassOop find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
| 0 | 474 |
| 475 // find a non-static or static field given its offset within the class. | |
| 476 bool contains_field_offset(int offset) { | |
|
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477 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
| 0 | 478 } |
| 479 | |
| 480 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
| 481 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
| 482 | |
| 483 // find a local method (returns NULL if not found) | |
|
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484 methodOop find_method(Symbol* name, Symbol* signature) const; |
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485 static methodOop find_method(objArrayOop methods, Symbol* name, Symbol* signature); |
| 0 | 486 |
| 487 // lookup operation (returns NULL if not found) | |
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488 methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const; |
| 0 | 489 |
| 490 // lookup a method in all the interfaces that this class implements | |
| 491 // (returns NULL if not found) | |
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492 methodOop lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
| 0 | 493 |
| 494 // constant pool | |
| 495 constantPoolOop constants() const { return _constants; } | |
| 496 void set_constants(constantPoolOop c) { oop_store_without_check((oop*) &_constants, (oop) c); } | |
| 497 | |
| 498 // class loader | |
| 499 oop class_loader() const { return _class_loader; } | |
| 500 void set_class_loader(oop l) { oop_store((oop*) &_class_loader, l); } | |
| 501 | |
| 502 // protection domain | |
| 503 oop protection_domain() { return _protection_domain; } | |
| 504 void set_protection_domain(oop pd) { oop_store((oop*) &_protection_domain, pd); } | |
| 505 | |
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506 // host class |
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507 oop host_klass() const { |
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508 oop* hk = adr_host_klass(); |
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509 if (hk == NULL) { |
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510 return NULL; |
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511 } else { |
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512 return *hk; |
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513 } |
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514 } |
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515 void set_host_klass(oop host) { |
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516 assert(is_anonymous(), "not anonymous"); |
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517 oop* addr = adr_host_klass(); |
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518 assert(addr != NULL, "no reversed space"); |
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519 oop_store(addr, host); |
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520 } |
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521 bool is_anonymous() const { |
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522 return (_misc_flags & _misc_is_anonymous) != 0; |
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523 } |
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524 void set_is_anonymous(bool value) { |
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525 if (value) { |
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526 _misc_flags |= _misc_is_anonymous; |
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527 } else { |
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528 _misc_flags &= ~_misc_is_anonymous; |
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529 } |
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530 } |
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531 |
| 0 | 532 // signers |
| 533 objArrayOop signers() const { return _signers; } | |
| 534 void set_signers(objArrayOop s) { oop_store((oop*) &_signers, oop(s)); } | |
| 535 | |
| 536 // source file name | |
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537 Symbol* source_file_name() const { return _source_file_name; } |
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538 void set_source_file_name(Symbol* n); |
| 0 | 539 |
| 540 // minor and major version numbers of class file | |
| 541 u2 minor_version() const { return _minor_version; } | |
| 542 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
| 543 u2 major_version() const { return _major_version; } | |
| 544 void set_major_version(u2 major_version) { _major_version = major_version; } | |
| 545 | |
| 546 // source debug extension | |
|
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547 char* source_debug_extension() const { return _source_debug_extension; } |
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548 void set_source_debug_extension(char* array, int length); |
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549 |
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550 // symbol unloading support (refcount already added) |
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551 Symbol* array_name() { return _array_name; } |
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552 void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; } |
| 0 | 553 |
| 554 // nonstatic oop-map blocks | |
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555 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
| 938 | 556 return oop_map_count * OopMapBlock::size_in_words(); |
| 557 } | |
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558 unsigned int nonstatic_oop_map_count() const { |
| 938 | 559 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
| 560 } | |
| 561 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
| 562 void set_nonstatic_oop_map_size(int words) { | |
| 563 _nonstatic_oop_map_size = words; | |
| 564 } | |
| 0 | 565 |
| 566 // RedefineClasses() support for previous versions: | |
| 567 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
| 568 int emcp_method_count); | |
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569 // If the _previous_versions array is non-NULL, then this klass |
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570 // has been redefined at least once even if we aren't currently |
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571 // tracking a previous version. |
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572 bool has_been_redefined() const { return _previous_versions != NULL; } |
| 0 | 573 bool has_previous_version() const; |
| 574 void init_previous_versions() { | |
| 575 _previous_versions = NULL; | |
| 576 } | |
| 577 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
| 578 return _previous_versions; | |
| 579 } | |
| 580 | |
| 581 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation | |
| 582 void set_cached_class_file(unsigned char *class_file_bytes, | |
| 583 jint class_file_len) { _cached_class_file_len = class_file_len; | |
| 584 _cached_class_file_bytes = class_file_bytes; } | |
| 585 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
| 586 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
| 587 | |
| 588 // JVMTI: Support for caching of field indices, types, and offsets | |
| 589 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
| 590 _jvmti_cached_class_field_map = descriptor; | |
| 591 } | |
| 592 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
| 593 return _jvmti_cached_class_field_map; | |
| 594 } | |
| 595 | |
| 596 // for adding methods, constMethodOopDesc::UNSET_IDNUM means no more ids available | |
| 597 inline u2 next_method_idnum(); | |
| 598 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
| 599 | |
| 600 // generics support | |
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601 Symbol* generic_signature() const { return _generic_signature; } |
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602 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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603 |
|
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604 u2 enclosing_method_data(int offset); |
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605 u2 enclosing_method_class_index() { |
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606 return enclosing_method_data(enclosing_method_class_index_offset); |
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607 } |
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608 u2 enclosing_method_method_index() { |
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609 return enclosing_method_data(enclosing_method_method_index_offset); |
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610 } |
| 0 | 611 void set_enclosing_method_indices(u2 class_index, |
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612 u2 method_index); |
| 0 | 613 |
| 614 // jmethodID support | |
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615 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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616 methodHandle method_h); |
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617 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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618 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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619 jmethodID* to_dealloc_id_p, |
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620 jmethodID** to_dealloc_jmeths_p); |
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621 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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622 size_t *length_p, jmethodID* id_p); |
| 0 | 623 jmethodID jmethod_id_or_null(methodOop method); |
| 624 | |
| 625 // cached itable index support | |
| 626 void set_cached_itable_index(size_t idnum, int index); | |
| 627 int cached_itable_index(size_t idnum); | |
| 628 | |
| 629 // annotations support | |
| 630 typeArrayOop class_annotations() const { return _class_annotations; } | |
| 631 objArrayOop fields_annotations() const { return _fields_annotations; } | |
| 632 objArrayOop methods_annotations() const { return _methods_annotations; } | |
| 633 objArrayOop methods_parameter_annotations() const { return _methods_parameter_annotations; } | |
| 634 objArrayOop methods_default_annotations() const { return _methods_default_annotations; } | |
| 635 void set_class_annotations(typeArrayOop md) { oop_store_without_check((oop*)&_class_annotations, (oop)md); } | |
| 636 void set_fields_annotations(objArrayOop md) { set_annotations(md, &_fields_annotations); } | |
| 637 void set_methods_annotations(objArrayOop md) { set_annotations(md, &_methods_annotations); } | |
| 638 void set_methods_parameter_annotations(objArrayOop md) { set_annotations(md, &_methods_parameter_annotations); } | |
| 639 void set_methods_default_annotations(objArrayOop md) { set_annotations(md, &_methods_default_annotations); } | |
| 640 typeArrayOop get_method_annotations_of(int idnum) | |
| 641 { return get_method_annotations_from(idnum, _methods_annotations); } | |
| 642 typeArrayOop get_method_parameter_annotations_of(int idnum) | |
| 643 { return get_method_annotations_from(idnum, _methods_parameter_annotations); } | |
| 644 typeArrayOop get_method_default_annotations_of(int idnum) | |
| 645 { return get_method_annotations_from(idnum, _methods_default_annotations); } | |
| 646 void set_method_annotations_of(int idnum, typeArrayOop anno) | |
| 647 { set_methods_annotations_of(idnum, anno, &_methods_annotations); } | |
| 648 void set_method_parameter_annotations_of(int idnum, typeArrayOop anno) | |
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649 { set_methods_annotations_of(idnum, anno, &_methods_parameter_annotations); } |
| 0 | 650 void set_method_default_annotations_of(int idnum, typeArrayOop anno) |
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651 { set_methods_annotations_of(idnum, anno, &_methods_default_annotations); } |
| 0 | 652 |
| 653 // allocation | |
| 654 DEFINE_ALLOCATE_PERMANENT(instanceKlass); | |
| 655 instanceOop allocate_instance(TRAPS); | |
| 656 instanceOop allocate_permanent_instance(TRAPS); | |
| 657 | |
| 658 // additional member function to return a handle | |
| 659 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
| 660 | |
| 661 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
| 662 // Helper function | |
| 663 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
| 664 | |
| 665 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
| 666 // if not, throw either an Error or an Exception. | |
| 667 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
| 668 | |
| 669 // initialization | |
| 670 void call_class_initializer(TRAPS); | |
| 671 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
| 672 | |
| 673 // OopMapCache support | |
| 674 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
| 675 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
| 676 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
| 677 | |
| 678 // JNI identifier support (for static fields - for jni performance) | |
| 679 JNIid* jni_ids() { return _jni_ids; } | |
| 680 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
| 681 JNIid* jni_id_for(int offset); | |
| 682 | |
| 683 // maintenance of deoptimization dependencies | |
| 684 int mark_dependent_nmethods(DepChange& changes); | |
| 685 void add_dependent_nmethod(nmethod* nm); | |
| 686 void remove_dependent_nmethod(nmethod* nm); | |
| 687 | |
| 688 // On-stack replacement support | |
| 689 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
| 690 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
| 691 void add_osr_nmethod(nmethod* n); | |
| 692 void remove_osr_nmethod(nmethod* n); | |
| 1783 | 693 nmethod* lookup_osr_nmethod(const methodOop m, int bci, int level, bool match_level) const; |
| 0 | 694 |
| 695 // Breakpoint support (see methods on methodOop for details) | |
| 696 BreakpointInfo* breakpoints() const { return _breakpoints; }; | |
| 697 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
| 698 | |
| 699 // support for stub routines | |
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700 static ByteSize init_state_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_state)); } |
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701 TRACE_DEFINE_OFFSET; |
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702 static ByteSize init_thread_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_thread)); } |
| 0 | 703 |
| 704 // subclass/subinterface checks | |
| 705 bool implements_interface(klassOop k) const; | |
| 706 | |
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707 // Access to the implementor of an interface. |
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708 klassOop implementor() const |
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709 { |
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710 klassOop* k = (klassOop*)adr_implementor(); |
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711 if (k == NULL) { |
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712 return NULL; |
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713 } else { |
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714 return *k; |
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715 } |
| 0 | 716 } |
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717 |
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718 void set_implementor(klassOop k) { |
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719 assert(is_interface(), "not interface"); |
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720 oop* addr = adr_implementor(); |
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721 oop_store_without_check(addr, k); |
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722 } |
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723 |
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724 int nof_implementors() const { |
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725 klassOop k = implementor(); |
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726 if (k == NULL) { |
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727 return 0; |
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728 } else if (k != this->as_klassOop()) { |
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729 return 1; |
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730 } else { |
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731 return 2; |
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732 } |
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733 } |
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734 |
| 0 | 735 void add_implementor(klassOop k); // k is a new class that implements this interface |
| 736 void init_implementor(); // initialize | |
| 737 | |
| 738 // link this class into the implementors list of every interface it implements | |
| 739 void process_interfaces(Thread *thread); | |
| 740 | |
| 741 // virtual operations from Klass | |
| 742 bool is_leaf_class() const { return _subklass == NULL; } | |
| 743 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); | |
| 744 bool compute_is_subtype_of(klassOop k); | |
| 745 bool can_be_primary_super_slow() const; | |
| 746 klassOop java_super() const { return super(); } | |
| 747 int oop_size(oop obj) const { return size_helper(); } | |
| 748 int klass_oop_size() const { return object_size(); } | |
| 749 bool oop_is_instance_slow() const { return true; } | |
| 750 | |
| 751 // Iterators | |
| 752 void do_local_static_fields(FieldClosure* cl); | |
| 753 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
| 754 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
| 755 | |
| 756 void methods_do(void f(methodOop method)); | |
| 757 void array_klasses_do(void f(klassOop k)); | |
| 758 void with_array_klasses_do(void f(klassOop k)); | |
| 759 bool super_types_do(SuperTypeClosure* blk); | |
| 760 | |
| 761 // Casting from klassOop | |
| 762 static instanceKlass* cast(klassOop k) { | |
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763 assert(k->is_klass(), "must be"); |
| 0 | 764 Klass* kp = k->klass_part(); |
| 765 assert(kp->null_vtbl() || kp->oop_is_instance_slow(), "cast to instanceKlass"); | |
| 766 return (instanceKlass*) kp; | |
| 767 } | |
| 768 | |
| 769 // Sizing (in words) | |
| 770 static int header_size() { return align_object_offset(oopDesc::header_size() + sizeof(instanceKlass)/HeapWordSize); } | |
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771 |
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772 int object_size() const |
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773 { |
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774 return object_size(align_object_offset(vtable_length()) + |
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775 align_object_offset(itable_length()) + |
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776 ((is_interface() || is_anonymous()) ? |
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777 align_object_offset(nonstatic_oop_map_size()) : |
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778 nonstatic_oop_map_size()) + |
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779 (is_interface() ? (int)sizeof(klassOop)/HeapWordSize : 0) + |
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780 (is_anonymous() ? (int)sizeof(klassOop)/HeapWordSize : 0)); |
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781 } |
| 0 | 782 static int vtable_start_offset() { return header_size(); } |
| 783 static int vtable_length_offset() { return oopDesc::header_size() + offset_of(instanceKlass, _vtable_len) / HeapWordSize; } | |
| 784 static int object_size(int extra) { return align_object_size(header_size() + extra); } | |
| 785 | |
| 786 intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); } | |
| 787 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } | |
| 788 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); } | |
| 789 | |
| 790 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
| 791 | |
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792 address static_field_addr(int offset); |
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793 |
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794 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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795 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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796 } |
| 0 | 797 |
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798 oop* adr_implementor() const { |
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799 if (is_interface()) { |
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800 return (oop*)(start_of_nonstatic_oop_maps() + |
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801 nonstatic_oop_map_count()); |
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802 } else { |
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803 return NULL; |
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804 } |
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805 }; |
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806 |
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807 oop* adr_host_klass() const { |
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808 if (is_anonymous()) { |
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809 oop* adr_impl = adr_implementor(); |
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810 if (adr_impl != NULL) { |
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811 return adr_impl + 1; |
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812 } else { |
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813 return (oop*)(start_of_nonstatic_oop_maps() + |
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814 nonstatic_oop_map_count()); |
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815 } |
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816 } else { |
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817 return NULL; |
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818 } |
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819 } |
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820 |
| 0 | 821 // Allocation profiling support |
| 822 juint alloc_size() const { return _alloc_count * size_helper(); } | |
| 823 void set_alloc_size(juint n) {} | |
| 824 | |
| 825 // Use this to return the size of an instance in heap words: | |
| 826 int size_helper() const { | |
| 827 return layout_helper_to_size_helper(layout_helper()); | |
| 828 } | |
| 829 | |
| 830 // This bit is initialized in classFileParser.cpp. | |
| 831 // It is false under any of the following conditions: | |
| 832 // - the class is abstract (including any interface) | |
| 833 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
| 834 // - the class size is larger than FastAllocateSizeLimit | |
| 835 // - the class is java/lang/Class, which cannot be allocated directly | |
| 836 bool can_be_fastpath_allocated() const { | |
| 837 return !layout_helper_needs_slow_path(layout_helper()); | |
| 838 } | |
| 839 | |
| 840 // Java vtable/itable | |
| 841 klassVtable* vtable() const; // return new klassVtable wrapper | |
| 842 inline methodOop method_at_vtable(int index); | |
| 843 klassItable* itable() const; // return new klassItable wrapper | |
| 844 methodOop method_at_itable(klassOop holder, int index, TRAPS); | |
| 845 | |
| 846 // Garbage collection | |
| 847 void oop_follow_contents(oop obj); | |
| 848 int oop_adjust_pointers(oop obj); | |
| 849 bool object_is_parsable() const { return _init_state != unparsable_by_gc; } | |
| 850 // Value of _init_state must be zero (unparsable_by_gc) when klass field is set. | |
| 851 | |
| 852 void follow_weak_klass_links( | |
| 853 BoolObjectClosure* is_alive, OopClosure* keep_alive); | |
| 854 void release_C_heap_structures(); | |
| 855 | |
| 856 // Parallel Scavenge and Parallel Old | |
| 857 PARALLEL_GC_DECLS | |
| 858 | |
| 859 // Naming | |
|
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860 const char* signature_name() const; |
| 0 | 861 |
| 862 // Iterators | |
| 863 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 864 return oop_oop_iterate_v(obj, blk); | |
| 865 } | |
| 866 | |
| 867 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 868 return oop_oop_iterate_v_m(obj, blk, mr); | |
| 869 } | |
| 870 | |
|
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871 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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872 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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873 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
| 0 | 874 MemRegion mr); |
| 875 | |
| 876 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
|
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877 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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878 |
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879 #ifndef SERIALGC |
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880 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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881 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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882 |
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883 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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884 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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885 #endif // !SERIALGC |
| 0 | 886 |
| 887 private: | |
| 888 // initialization state | |
| 889 #ifdef ASSERT | |
| 890 void set_init_state(ClassState state); | |
| 891 #else | |
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892 void set_init_state(ClassState state) { _init_state = (u1)state; } |
| 0 | 893 #endif |
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894 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
| 0 | 895 void set_init_thread(Thread *thread) { _init_thread = thread; } |
| 896 | |
| 897 u2 idnum_allocated_count() const { return _idnum_allocated_count; } | |
|
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898 // The RedefineClasses() API can cause new method idnums to be needed |
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899 // which will cause the caches to grow. Safety requires different |
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900 // cache management logic if the caches can grow instead of just |
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901 // going from NULL to non-NULL. |
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902 bool idnum_can_increment() const { return has_been_redefined(); } |
| 0 | 903 jmethodID* methods_jmethod_ids_acquire() const |
| 904 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
| 905 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
| 906 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
| 907 | |
| 908 int* methods_cached_itable_indices_acquire() const | |
| 909 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
| 910 void release_set_methods_cached_itable_indices(int* indices) | |
| 911 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
| 912 | |
| 913 inline typeArrayOop get_method_annotations_from(int idnum, objArrayOop annos); | |
| 914 void set_annotations(objArrayOop md, objArrayOop* md_p) { oop_store_without_check((oop*)md_p, (oop)md); } | |
| 915 void set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p); | |
| 916 | |
| 917 // Offsets for memory management | |
| 918 oop* adr_array_klasses() const { return (oop*)&this->_array_klasses;} | |
| 919 oop* adr_methods() const { return (oop*)&this->_methods;} | |
| 920 oop* adr_method_ordering() const { return (oop*)&this->_method_ordering;} | |
| 921 oop* adr_local_interfaces() const { return (oop*)&this->_local_interfaces;} | |
| 922 oop* adr_transitive_interfaces() const { return (oop*)&this->_transitive_interfaces;} | |
| 923 oop* adr_fields() const { return (oop*)&this->_fields;} | |
| 924 oop* adr_constants() const { return (oop*)&this->_constants;} | |
| 925 oop* adr_class_loader() const { return (oop*)&this->_class_loader;} | |
| 926 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
| 927 oop* adr_signers() const { return (oop*)&this->_signers;} | |
| 928 oop* adr_inner_classes() const { return (oop*)&this->_inner_classes;} | |
| 929 oop* adr_methods_jmethod_ids() const { return (oop*)&this->_methods_jmethod_ids;} | |
| 930 oop* adr_methods_cached_itable_indices() const { return (oop*)&this->_methods_cached_itable_indices;} | |
| 931 oop* adr_class_annotations() const { return (oop*)&this->_class_annotations;} | |
| 932 oop* adr_fields_annotations() const { return (oop*)&this->_fields_annotations;} | |
| 933 oop* adr_methods_annotations() const { return (oop*)&this->_methods_annotations;} | |
| 934 oop* adr_methods_parameter_annotations() const { return (oop*)&this->_methods_parameter_annotations;} | |
| 935 oop* adr_methods_default_annotations() const { return (oop*)&this->_methods_default_annotations;} | |
| 936 | |
| 937 // Static methods that are used to implement member methods where an exposed this pointer | |
| 938 // is needed due to possible GCs | |
| 939 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
| 940 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
| 941 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
| 942 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
| 943 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
| 944 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
| 945 static klassOop array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); | |
| 946 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); | |
| 947 /* jni_id_for_impl for jfieldID only */ | |
| 948 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
| 949 | |
| 950 // Returns the array class for the n'th dimension | |
| 951 klassOop array_klass_impl(bool or_null, int n, TRAPS); | |
| 952 | |
| 953 // Returns the array class with this class as element type | |
| 954 klassOop array_klass_impl(bool or_null, TRAPS); | |
| 955 | |
| 956 public: | |
| 957 // sharing support | |
| 958 virtual void remove_unshareable_info(); | |
|
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959 virtual void shared_symbols_iterate(SymbolClosure* closure); |
| 0 | 960 |
| 961 // jvm support | |
| 962 jint compute_modifier_flags(TRAPS) const; | |
| 963 | |
| 964 public: | |
| 965 // JVMTI support | |
| 966 jint jvmti_class_status() const; | |
| 967 | |
| 968 public: | |
| 969 // Printing | |
|
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970 void oop_print_value_on(oop obj, outputStream* st); |
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971 |
| 0 | 972 void oop_print_on (oop obj, outputStream* st); |
| 973 | |
| 974 void print_dependent_nmethods(bool verbose = false); | |
| 975 bool is_dependent_nmethod(nmethod* nm); | |
| 976 | |
| 977 // Verification | |
| 978 const char* internal_name() const; | |
| 979 void oop_verify_on(oop obj, outputStream* st); | |
| 980 }; | |
| 981 | |
| 982 inline methodOop instanceKlass::method_at_vtable(int index) { | |
| 983 #ifndef PRODUCT | |
| 984 assert(index >= 0, "valid vtable index"); | |
| 985 if (DebugVtables) { | |
| 986 verify_vtable_index(index); | |
| 987 } | |
| 988 #endif | |
| 989 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
| 990 return ve[index].method(); | |
| 991 } | |
| 992 | |
| 993 inline typeArrayOop instanceKlass::get_method_annotations_from(int idnum, objArrayOop annos) { | |
| 994 if (annos == NULL || annos->length() <= idnum) { | |
| 995 return NULL; | |
| 996 } | |
| 997 return typeArrayOop(annos->obj_at(idnum)); | |
| 998 } | |
| 999 | |
| 1000 // for adding methods | |
| 1001 // UNSET_IDNUM return means no more ids available | |
| 1002 inline u2 instanceKlass::next_method_idnum() { | |
| 1003 if (_idnum_allocated_count == constMethodOopDesc::MAX_IDNUM) { | |
| 1004 return constMethodOopDesc::UNSET_IDNUM; // no more ids available | |
| 1005 } else { | |
| 1006 return _idnum_allocated_count++; | |
| 1007 } | |
| 1008 } | |
| 1009 | |
| 1010 | |
| 1011 /* JNIid class for jfieldIDs only */ | |
| 6197 | 1012 class JNIid: public CHeapObj<mtClass> { |
| 0 | 1013 friend class VMStructs; |
| 1014 private: | |
| 1015 klassOop _holder; | |
| 1016 JNIid* _next; | |
| 1017 int _offset; | |
| 1018 #ifdef ASSERT | |
| 1019 bool _is_static_field_id; | |
| 1020 #endif | |
| 1021 | |
| 1022 public: | |
| 1023 // Accessors | |
| 1024 klassOop holder() const { return _holder; } | |
| 1025 int offset() const { return _offset; } | |
| 1026 JNIid* next() { return _next; } | |
| 1027 // Constructor | |
| 1028 JNIid(klassOop holder, int offset, JNIid* next); | |
| 1029 // Identifier lookup | |
| 1030 JNIid* find(int offset); | |
| 1031 | |
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1032 bool find_local_field(fieldDescriptor* fd) { |
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1033 return instanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1034 } |
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1035 |
| 0 | 1036 // Garbage collection support |
| 1037 oop* holder_addr() { return (oop*)&_holder; } | |
| 1038 void oops_do(OopClosure* f); | |
| 1039 static void deallocate(JNIid* id); | |
| 1040 // Debugging | |
| 1041 #ifdef ASSERT | |
| 1042 bool is_static_field_id() const { return _is_static_field_id; } | |
| 1043 void set_is_static_field_id() { _is_static_field_id = true; } | |
| 1044 #endif | |
| 1045 void verify(klassOop holder); | |
| 1046 }; | |
| 1047 | |
| 1048 | |
| 1049 // If breakpoints are more numerous than just JVMTI breakpoints, | |
| 1050 // consider compressing this data structure. | |
| 1051 // It is currently a simple linked list defined in methodOop.hpp. | |
| 1052 | |
| 1053 class BreakpointInfo; | |
| 1054 | |
| 1055 | |
| 1056 // A collection point for interesting information about the previous | |
| 1057 // version(s) of an instanceKlass. This class uses weak references to | |
| 1058 // the information so that the information may be collected as needed | |
|
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1059 // by the system. If the information is shared, then a regular |
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1060 // reference must be used because a weak reference would be seen as |
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1061 // collectible. A GrowableArray of PreviousVersionNodes is attached |
| 0 | 1062 // to the instanceKlass as needed. See PreviousVersionWalker below. |
| 6197 | 1063 class PreviousVersionNode : public CHeapObj<mtClass> { |
| 0 | 1064 private: |
|
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1065 // A shared ConstantPool is never collected so we'll always have |
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1066 // a reference to it so we can update items in the cache. We'll |
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1067 // have a weak reference to a non-shared ConstantPool until all |
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1068 // of the methods (EMCP or obsolete) have been collected; the |
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1069 // non-shared ConstantPool becomes collectible at that point. |
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1070 jobject _prev_constant_pool; // regular or weak reference |
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1071 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1072 |
| 0 | 1073 // If the previous version of the instanceKlass doesn't have any |
| 1074 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the | |
| 1075 // EMCP methods have been collected, then _prev_EMCP_methods can | |
| 1076 // have a length of zero. | |
| 1077 GrowableArray<jweak>* _prev_EMCP_methods; | |
| 1078 | |
| 1079 public: | |
|
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1080 PreviousVersionNode(jobject prev_constant_pool, bool prev_cp_is_weak, |
| 0 | 1081 GrowableArray<jweak>* prev_EMCP_methods); |
| 1082 ~PreviousVersionNode(); | |
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1083 jobject prev_constant_pool() const { |
| 0 | 1084 return _prev_constant_pool; |
| 1085 } | |
| 1086 GrowableArray<jweak>* prev_EMCP_methods() const { | |
| 1087 return _prev_EMCP_methods; | |
| 1088 } | |
| 1089 }; | |
| 1090 | |
| 1091 | |
| 1092 // A Handle-ized version of PreviousVersionNode. | |
| 1093 class PreviousVersionInfo : public ResourceObj { | |
| 1094 private: | |
| 1095 constantPoolHandle _prev_constant_pool_handle; | |
| 1096 // If the previous version of the instanceKlass doesn't have any | |
| 1097 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the | |
| 1098 // methods cannot be collected while we hold a handle, | |
| 1099 // _prev_EMCP_methods should never have a length of zero. | |
| 1100 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
| 1101 | |
| 1102 public: | |
| 1103 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
| 1104 ~PreviousVersionInfo(); | |
| 1105 constantPoolHandle prev_constant_pool_handle() const { | |
| 1106 return _prev_constant_pool_handle; | |
| 1107 } | |
| 1108 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
| 1109 return _prev_EMCP_method_handles; | |
| 1110 } | |
| 1111 }; | |
| 1112 | |
| 1113 | |
| 1114 // Helper object for walking previous versions. This helper cleans up | |
| 1115 // the Handles that it allocates when the helper object is destroyed. | |
| 1116 // The PreviousVersionInfo object returned by next_previous_version() | |
| 1117 // is only valid until a subsequent call to next_previous_version() or | |
| 1118 // the helper object is destroyed. | |
| 1119 class PreviousVersionWalker : public StackObj { | |
| 1120 private: | |
| 1121 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
| 1122 int _current_index; | |
| 1123 // Fields for cleaning up when we are done walking the previous versions: | |
| 1124 // A HandleMark for the PreviousVersionInfo handles: | |
| 1125 HandleMark _hm; | |
| 1126 | |
| 1127 // It would be nice to have a ResourceMark field in this helper also, | |
| 1128 // but the ResourceMark code says to be careful to delete handles held | |
| 1129 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
| 1130 // can't guarantee the order in which the fields are destroyed, we | |
| 1131 // have to let the creator of the PreviousVersionWalker object do | |
| 1132 // the right thing. Also, adding a ResourceMark here causes an | |
| 1133 // include loop. | |
| 1134 | |
| 1135 // A pointer to the current info object so we can handle the deletes. | |
| 1136 PreviousVersionInfo * _current_p; | |
| 1137 | |
| 1138 public: | |
| 1139 PreviousVersionWalker(instanceKlass *ik); | |
| 1140 ~PreviousVersionWalker(); | |
| 1141 | |
| 1142 // Return the interesting information for the next previous version | |
| 1143 // of the klass. Returns NULL if there are no more previous versions. | |
| 1144 PreviousVersionInfo* next_previous_version(); | |
| 1145 }; | |
| 1972 | 1146 |
| 3939 | 1147 |
| 1148 // | |
| 1149 // nmethodBucket is used to record dependent nmethods for | |
| 1150 // deoptimization. nmethod dependencies are actually <klass, method> | |
| 1151 // pairs but we really only care about the klass part for purposes of | |
| 1152 // finding nmethods which might need to be deoptimized. Instead of | |
| 1153 // recording the method, a count of how many times a particular nmethod | |
| 1154 // was recorded is kept. This ensures that any recording errors are | |
| 1155 // noticed since an nmethod should be removed as many times are it's | |
| 1156 // added. | |
| 1157 // | |
| 6197 | 1158 class nmethodBucket: public CHeapObj<mtClass> { |
| 3939 | 1159 friend class VMStructs; |
| 1160 private: | |
| 1161 nmethod* _nmethod; | |
| 1162 int _count; | |
| 1163 nmethodBucket* _next; | |
| 1164 | |
| 1165 public: | |
| 1166 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
| 1167 _nmethod = nmethod; | |
| 1168 _next = next; | |
| 1169 _count = 1; | |
| 1170 } | |
| 1171 int count() { return _count; } | |
| 1172 int increment() { _count += 1; return _count; } | |
| 1173 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
| 1174 nmethodBucket* next() { return _next; } | |
| 1175 void set_next(nmethodBucket* b) { _next = b; } | |
| 1176 nmethod* get_nmethod() { return _nmethod; } | |
| 1177 }; | |
| 1178 | |
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1179 // An iterator that's used to access the inner classes indices in the |
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1180 // instanceKlass::_inner_classes array. |
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1181 class InnerClassesIterator : public StackObj { |
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1182 private: |
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1183 typeArrayHandle _inner_classes; |
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1184 int _length; |
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1185 int _idx; |
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1186 public: |
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1187 |
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1188 InnerClassesIterator(instanceKlassHandle k) { |
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1189 _inner_classes = k->inner_classes(); |
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1190 if (k->inner_classes() != NULL) { |
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1191 _length = _inner_classes->length(); |
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1192 // The inner class array's length should be the multiple of |
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1193 // inner_class_next_offset if it only contains the InnerClasses |
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1194 // attribute data, or it should be |
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1195 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1196 // if it also contains the EnclosingMethod data. |
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1197 assert((_length % instanceKlass::inner_class_next_offset == 0 || |
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1198 _length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size), |
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1199 "just checking"); |
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1200 // Remove the enclosing_method portion if exists. |
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1201 if (_length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size) { |
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1202 _length -= instanceKlass::enclosing_method_attribute_size; |
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1203 } |
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1204 } else { |
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1205 _length = 0; |
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1206 } |
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1207 _idx = 0; |
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1208 } |
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1209 |
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1210 int length() const { |
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1211 return _length; |
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1212 } |
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1213 |
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1214 void next() { |
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1215 _idx += instanceKlass::inner_class_next_offset; |
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1216 } |
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1217 |
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1218 bool done() const { |
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1219 return (_idx >= _length); |
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1220 } |
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1221 |
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1222 u2 inner_class_info_index() const { |
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1223 return _inner_classes->ushort_at( |
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1224 _idx + instanceKlass::inner_class_inner_class_info_offset); |
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1225 } |
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1226 |
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1227 void set_inner_class_info_index(u2 index) { |
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1228 _inner_classes->ushort_at_put( |
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1229 _idx + instanceKlass::inner_class_inner_class_info_offset, index); |
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1230 } |
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1231 |
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1232 u2 outer_class_info_index() const { |
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1233 return _inner_classes->ushort_at( |
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1234 _idx + instanceKlass::inner_class_outer_class_info_offset); |
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1235 } |
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1236 |
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1237 void set_outer_class_info_index(u2 index) { |
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1238 _inner_classes->ushort_at_put( |
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1239 _idx + instanceKlass::inner_class_outer_class_info_offset, index); |
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1240 } |
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1241 |
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1242 u2 inner_name_index() const { |
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1243 return _inner_classes->ushort_at( |
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1244 _idx + instanceKlass::inner_class_inner_name_offset); |
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1245 } |
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1246 |
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1247 void set_inner_name_index(u2 index) { |
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1248 _inner_classes->ushort_at_put( |
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1249 _idx + instanceKlass::inner_class_inner_name_offset, index); |
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1250 } |
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1251 |
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1252 u2 inner_access_flags() const { |
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1253 return _inner_classes->ushort_at( |
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1254 _idx + instanceKlass::inner_class_access_flags_offset); |
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1255 } |
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1256 }; |
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1257 |
| 1972 | 1258 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |