Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.hpp @ 6038:8bafad97cd26
7158552: The instanceKlsss::_host_klass is only needed for anonymous class for JSR 292 support.
Summary: Change the _host_klass to be conditionally created embedded instanceKlass field.
Reviewed-by: jrose, coleenp, dholmes
| author | jiangli |
|---|---|
| date | Wed, 02 May 2012 13:21:36 -0400 |
| parents | 0105f367a14c |
| children | 2766551175a0 |
| rev | line source |
|---|---|
| 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 | |
| 101 #ifndef PRODUCT | |
| 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 }; | |
| 111 #endif // !PRODUCT | |
| 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; | |
| 171 // Instance and static variable information, 5-tuples of shorts [access, name | |
| 172 // index, sig index, initval index, offset]. | |
| 173 typeArrayOop _fields; | |
| 174 // Constant pool for this class. | |
| 175 constantPoolOop _constants; | |
| 176 // Class loader used to load this class, NULL if VM loader used. | |
| 177 oop _class_loader; | |
| 178 // Protection domain. | |
| 179 oop _protection_domain; | |
| 180 // Class signers. | |
| 181 objArrayOop _signers; | |
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182 // The InnerClasses attribute and EnclosingMethod attribute. The |
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183 // _inner_classes is an array of shorts. If the class has InnerClasses |
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184 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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185 // [inner_class_info_index, outer_class_info_index, |
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186 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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187 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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188 // last two shorts [class_index, method_index] of the array. If only |
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189 // the InnerClasses attribute exists, the _inner_classes array length is |
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190 // number_of_inner_classes * 4. If the class has both InnerClasses |
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191 // and EnclosingMethod attributes the _inner_classes array length is |
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192 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
| 0 | 193 typeArrayOop _inner_classes; |
| 194 // Annotations for this class, or null if none. | |
| 195 typeArrayOop _class_annotations; | |
| 196 // Annotation objects (byte arrays) for fields, or null if no annotations. | |
| 197 // Indices correspond to entries (not indices) in fields array. | |
| 198 objArrayOop _fields_annotations; | |
| 199 // Annotation objects (byte arrays) for methods, or null if no annotations. | |
| 200 // Index is the idnum, which is initially the same as the methods array index. | |
| 201 objArrayOop _methods_annotations; | |
| 202 // Annotation objects (byte arrays) for methods' parameters, or null if no | |
| 203 // such annotations. | |
| 204 // Index is the idnum, which is initially the same as the methods array index. | |
| 205 objArrayOop _methods_parameter_annotations; | |
| 206 // Annotation objects (byte arrays) for methods' default values, or null if no | |
| 207 // such annotations. | |
| 208 // Index is the idnum, which is initially the same as the methods array index. | |
| 209 objArrayOop _methods_default_annotations; | |
| 210 | |
| 211 // | |
| 212 // End of the oop block. | |
| 213 // | |
| 214 | |
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215 // Name of source file containing this klass, NULL if not specified. |
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216 Symbol* _source_file_name; |
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217 // the source debug extension for this klass, NULL if not specified. |
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218 Symbol* _source_debug_extension; |
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219 // Generic signature, or null if none. |
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220 Symbol* _generic_signature; |
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221 // Array name derived from this class which needs unreferencing |
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222 // if this class is unloaded. |
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223 Symbol* _array_name; |
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224 |
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225 // Number of heapOopSize words used by non-static fields in this klass |
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226 // (including inherited fields but after header_size()). |
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227 int _nonstatic_field_size; |
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228 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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229 u2 _static_oop_field_count;// number of static oop fields in this klass |
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230 u2 _java_fields_count; // The number of declared Java fields |
| 938 | 231 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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232 |
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233 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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234 enum { |
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235 _misc_rewritten = 1 << 0, // methods rewritten. |
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236 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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237 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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238 _misc_is_anonymous = 1 << 3 // has embedded _inner_classes field |
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239 }; |
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240 u2 _misc_flags; |
| 0 | 241 u2 _minor_version; // minor version number of class file |
| 242 u2 _major_version; // major version number of class file | |
| 243 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
| 244 int _vtable_len; // length of Java vtable (in words) | |
| 245 int _itable_len; // length of Java itable (in words) | |
| 246 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
| 247 JNIid* _jni_ids; // First JNI identifier for static fields in this class | |
| 248 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
| 249 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
| 250 nmethodBucket* _dependencies; // list of dependent nmethods | |
| 251 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
| 252 BreakpointInfo* _breakpoints; // bpt lists, managed by methodOop | |
| 253 // Array of interesting part(s) of the previous version(s) of this | |
| 254 // instanceKlass. See PreviousVersionWalker below. | |
| 255 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
| 256 // JVMTI fields can be moved to their own structure - see 6315920 | |
| 257 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
| 258 jint _cached_class_file_len; // JVMTI: length of above | |
| 259 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration | |
| 260 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change | |
| 261 | |
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262 // Class states are defined as ClassState (see above). |
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263 // Place the _init_state here to utilize the unused 2-byte after |
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264 // _idnum_allocated_count. |
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265 u1 _init_state; // state of class |
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266 |
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267 u1 _reference_type; // reference type |
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268 |
| 0 | 269 // embedded Java vtable follows here |
| 270 // embedded Java itables follows here | |
| 271 // embedded static fields follows here | |
| 272 // embedded nonstatic oop-map blocks follows here | |
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273 // embedded implementor of this interface follows here |
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274 // The embedded implementor only exists if the current klass is an |
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275 // iterface. The possible values of the implementor fall into following |
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276 // three cases: |
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277 // NULL: no implementor. |
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278 // A klassOop that's not itself: one implementor. |
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279 // Itsef: more than one implementors. |
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280 // embedded host klass follows here |
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281 // The embedded host klass only exists in an anonymous class for |
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282 // dynamic language support (JSR 292 enabled). The host class grants |
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283 // its access privileges to this class also. The host class is either |
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284 // named, or a previously loaded anonymous class. A non-anonymous class |
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285 // or an anonymous class loaded through normal classloading does not |
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286 // have this embedded field. |
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287 // |
| 0 | 288 |
| 289 friend class instanceKlassKlass; | |
| 290 friend class SystemDictionary; | |
| 291 | |
| 292 public: | |
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293 bool has_nonstatic_fields() const { |
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294 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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295 } |
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296 void set_has_nonstatic_fields(bool b) { |
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297 if (b) { |
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298 _misc_flags |= _misc_has_nonstatic_fields; |
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299 } else { |
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300 _misc_flags &= ~_misc_has_nonstatic_fields; |
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301 } |
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302 } |
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303 |
| 0 | 304 // field sizes |
| 305 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
| 306 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
| 307 | |
| 308 int static_field_size() const { return _static_field_size; } | |
| 309 void set_static_field_size(int size) { _static_field_size = size; } | |
| 310 | |
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311 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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312 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
| 0 | 313 |
| 314 // Java vtable | |
| 315 int vtable_length() const { return _vtable_len; } | |
| 316 void set_vtable_length(int len) { _vtable_len = len; } | |
| 317 | |
| 318 // Java itable | |
| 319 int itable_length() const { return _itable_len; } | |
| 320 void set_itable_length(int len) { _itable_len = len; } | |
| 321 | |
| 322 // array klasses | |
| 323 klassOop array_klasses() const { return _array_klasses; } | |
| 324 void set_array_klasses(klassOop k) { oop_store_without_check((oop*) &_array_klasses, (oop) k); } | |
| 325 | |
| 326 // methods | |
| 327 objArrayOop methods() const { return _methods; } | |
| 328 void set_methods(objArrayOop a) { oop_store_without_check((oop*) &_methods, (oop) a); } | |
| 329 methodOop method_with_idnum(int idnum); | |
| 330 | |
| 331 // method ordering | |
| 332 typeArrayOop method_ordering() const { return _method_ordering; } | |
| 333 void set_method_ordering(typeArrayOop m) { oop_store_without_check((oop*) &_method_ordering, (oop) m); } | |
| 334 | |
| 335 // interfaces | |
| 336 objArrayOop local_interfaces() const { return _local_interfaces; } | |
| 337 void set_local_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_local_interfaces, (oop) a); } | |
| 338 objArrayOop transitive_interfaces() const { return _transitive_interfaces; } | |
| 339 void set_transitive_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_transitive_interfaces, (oop) a); } | |
| 340 | |
| 3938 | 341 private: |
| 342 friend class fieldDescriptor; | |
| 343 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
| 344 | |
| 345 public: | |
| 346 int field_offset (int index) const { return field(index)->offset(); } | |
| 347 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
| 348 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
| 349 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
| 350 | |
| 351 // Number of Java declared fields | |
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352 int java_fields_count() const { return (int)_java_fields_count; } |
| 3938 | 353 |
| 354 // Number of fields including any injected fields | |
| 355 int all_fields_count() const { return _fields->length() / sizeof(FieldInfo::field_slots); } | |
| 0 | 356 |
| 357 typeArrayOop fields() const { return _fields; } | |
| 3938 | 358 |
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359 void set_fields(typeArrayOop f, u2 java_fields_count) { |
| 3938 | 360 oop_store_without_check((oop*) &_fields, (oop) f); |
| 361 _java_fields_count = java_fields_count; | |
| 0 | 362 } |
| 363 | |
| 364 // inner classes | |
| 365 typeArrayOop inner_classes() const { return _inner_classes; } | |
| 366 void set_inner_classes(typeArrayOop f) { oop_store_without_check((oop*) &_inner_classes, (oop) f); } | |
| 367 | |
| 368 enum InnerClassAttributeOffset { | |
| 369 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
| 370 inner_class_inner_class_info_offset = 0, | |
| 371 inner_class_outer_class_info_offset = 1, | |
| 372 inner_class_inner_name_offset = 2, | |
| 373 inner_class_access_flags_offset = 3, | |
| 374 inner_class_next_offset = 4 | |
| 375 }; | |
| 376 | |
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377 enum EnclosingMethodAttributeOffset { |
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378 enclosing_method_class_index_offset = 0, |
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379 enclosing_method_method_index_offset = 1, |
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380 enclosing_method_attribute_size = 2 |
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381 }; |
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382 |
|
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383 // method override check |
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384 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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385 |
| 0 | 386 // package |
| 387 bool is_same_class_package(klassOop class2); | |
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388 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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389 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
| 0 | 390 |
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391 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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392 klassOop compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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393 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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394 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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395 } |
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396 static klassOop compute_enclosing_class_impl(instanceKlassHandle self, |
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397 bool* inner_is_member, TRAPS); |
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398 |
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399 // tell if two classes have the same enclosing class (at package level) |
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400 bool is_same_package_member(klassOop class2, TRAPS) { |
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401 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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402 return is_same_package_member_impl(self, class2, THREAD); |
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403 } |
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404 static bool is_same_package_member_impl(instanceKlassHandle self, |
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405 klassOop class2, TRAPS); |
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406 |
| 0 | 407 // initialization state |
| 408 bool is_loaded() const { return _init_state >= loaded; } | |
| 409 bool is_linked() const { return _init_state >= linked; } | |
| 410 bool is_initialized() const { return _init_state == fully_initialized; } | |
| 411 bool is_not_initialized() const { return _init_state < being_initialized; } | |
| 412 bool is_being_initialized() const { return _init_state == being_initialized; } | |
| 413 bool is_in_error_state() const { return _init_state == initialization_error; } | |
| 414 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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415 ClassState init_state() { return (ClassState)_init_state; } |
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416 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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417 |
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418 // defineClass specified verification |
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419 bool should_verify_class() const { |
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420 return (_misc_flags & _misc_should_verify_class) != 0; |
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421 } |
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422 void set_should_verify_class(bool value) { |
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423 if (value) { |
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424 _misc_flags |= _misc_should_verify_class; |
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425 } else { |
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426 _misc_flags &= ~_misc_should_verify_class; |
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427 } |
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428 } |
| 0 | 429 |
| 430 // marking | |
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431 bool is_marked_dependent() const { return _is_marked_dependent; } |
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432 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
| 0 | 433 |
| 434 // initialization (virtuals from Klass) | |
| 435 bool should_be_initialized() const; // means that initialize should be called | |
| 436 void initialize(TRAPS); | |
| 437 void link_class(TRAPS); | |
| 438 bool link_class_or_fail(TRAPS); // returns false on failure | |
| 439 void unlink_class(); | |
| 440 void rewrite_class(TRAPS); | |
| 3748 | 441 void relocate_and_link_methods(TRAPS); |
| 0 | 442 methodOop class_initializer(); |
| 443 | |
| 444 // set the class to initialized if no static initializer is present | |
| 445 void eager_initialize(Thread *thread); | |
| 446 | |
| 447 // reference type | |
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448 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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449 void set_reference_type(ReferenceType t) { |
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450 assert(t == (u1)t, "overflow"); |
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451 _reference_type = (u1)t; |
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452 } |
| 0 | 453 |
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454 static ByteSize reference_type_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _reference_type)); } |
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455 |
| 0 | 456 // find local field, returns true if found |
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457 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 458 // find field in direct superinterfaces, returns the interface in which the field is defined |
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459 klassOop find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 460 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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461 klassOop find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 0 | 462 // 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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463 klassOop find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
| 0 | 464 |
| 465 // find a non-static or static field given its offset within the class. | |
| 466 bool contains_field_offset(int offset) { | |
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467 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
| 0 | 468 } |
| 469 | |
| 470 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
| 471 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
| 472 | |
| 473 // find a local method (returns NULL if not found) | |
|
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474 methodOop find_method(Symbol* name, Symbol* signature) const; |
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475 static methodOop find_method(objArrayOop methods, Symbol* name, Symbol* signature); |
| 0 | 476 |
| 477 // lookup operation (returns NULL if not found) | |
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478 methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const; |
| 0 | 479 |
| 480 // lookup a method in all the interfaces that this class implements | |
| 481 // (returns NULL if not found) | |
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482 methodOop lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
| 0 | 483 |
| 484 // constant pool | |
| 485 constantPoolOop constants() const { return _constants; } | |
| 486 void set_constants(constantPoolOop c) { oop_store_without_check((oop*) &_constants, (oop) c); } | |
| 487 | |
| 488 // class loader | |
| 489 oop class_loader() const { return _class_loader; } | |
| 490 void set_class_loader(oop l) { oop_store((oop*) &_class_loader, l); } | |
| 491 | |
| 492 // protection domain | |
| 493 oop protection_domain() { return _protection_domain; } | |
| 494 void set_protection_domain(oop pd) { oop_store((oop*) &_protection_domain, pd); } | |
| 495 | |
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496 // host class |
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497 oop host_klass() const { |
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498 oop* hk = adr_host_klass(); |
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499 if (hk == NULL) { |
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500 return NULL; |
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501 } else { |
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502 return *hk; |
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503 } |
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504 } |
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505 void set_host_klass(oop host) { |
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506 assert(is_anonymous(), "not anonymous"); |
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507 oop* addr = adr_host_klass(); |
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508 assert(addr != NULL, "no reversed space"); |
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509 oop_store(addr, host); |
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510 } |
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511 bool is_anonymous() const { |
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512 return (_misc_flags & _misc_is_anonymous) != 0; |
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513 } |
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514 void set_is_anonymous(bool value) { |
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515 if (value) { |
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516 _misc_flags |= _misc_is_anonymous; |
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517 } else { |
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518 _misc_flags &= ~_misc_is_anonymous; |
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519 } |
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520 } |
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521 |
| 0 | 522 // signers |
| 523 objArrayOop signers() const { return _signers; } | |
| 524 void set_signers(objArrayOop s) { oop_store((oop*) &_signers, oop(s)); } | |
| 525 | |
| 526 // source file name | |
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527 Symbol* source_file_name() const { return _source_file_name; } |
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528 void set_source_file_name(Symbol* n); |
| 0 | 529 |
| 530 // minor and major version numbers of class file | |
| 531 u2 minor_version() const { return _minor_version; } | |
| 532 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
| 533 u2 major_version() const { return _major_version; } | |
| 534 void set_major_version(u2 major_version) { _major_version = major_version; } | |
| 535 | |
| 536 // source debug extension | |
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537 Symbol* source_debug_extension() const { return _source_debug_extension; } |
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538 void set_source_debug_extension(Symbol* n); |
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539 |
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540 // symbol unloading support (refcount already added) |
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541 Symbol* array_name() { return _array_name; } |
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542 void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; } |
| 0 | 543 |
| 544 // nonstatic oop-map blocks | |
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545 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
| 938 | 546 return oop_map_count * OopMapBlock::size_in_words(); |
| 547 } | |
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548 unsigned int nonstatic_oop_map_count() const { |
| 938 | 549 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
| 550 } | |
| 551 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
| 552 void set_nonstatic_oop_map_size(int words) { | |
| 553 _nonstatic_oop_map_size = words; | |
| 554 } | |
| 0 | 555 |
| 556 // RedefineClasses() support for previous versions: | |
| 557 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
| 558 int emcp_method_count); | |
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559 // If the _previous_versions array is non-NULL, then this klass |
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560 // has been redefined at least once even if we aren't currently |
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561 // tracking a previous version. |
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562 bool has_been_redefined() const { return _previous_versions != NULL; } |
| 0 | 563 bool has_previous_version() const; |
| 564 void init_previous_versions() { | |
| 565 _previous_versions = NULL; | |
| 566 } | |
| 567 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
| 568 return _previous_versions; | |
| 569 } | |
| 570 | |
| 571 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation | |
| 572 void set_cached_class_file(unsigned char *class_file_bytes, | |
| 573 jint class_file_len) { _cached_class_file_len = class_file_len; | |
| 574 _cached_class_file_bytes = class_file_bytes; } | |
| 575 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
| 576 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
| 577 | |
| 578 // JVMTI: Support for caching of field indices, types, and offsets | |
| 579 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
| 580 _jvmti_cached_class_field_map = descriptor; | |
| 581 } | |
| 582 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
| 583 return _jvmti_cached_class_field_map; | |
| 584 } | |
| 585 | |
| 586 // for adding methods, constMethodOopDesc::UNSET_IDNUM means no more ids available | |
| 587 inline u2 next_method_idnum(); | |
| 588 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
| 589 | |
| 590 // generics support | |
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591 Symbol* generic_signature() const { return _generic_signature; } |
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592 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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593 |
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594 u2 enclosing_method_data(int offset); |
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595 u2 enclosing_method_class_index() { |
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596 return enclosing_method_data(enclosing_method_class_index_offset); |
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597 } |
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598 u2 enclosing_method_method_index() { |
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599 return enclosing_method_data(enclosing_method_method_index_offset); |
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600 } |
| 0 | 601 void set_enclosing_method_indices(u2 class_index, |
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602 u2 method_index); |
| 0 | 603 |
| 604 // jmethodID support | |
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605 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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606 methodHandle method_h); |
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607 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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608 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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609 jmethodID* to_dealloc_id_p, |
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610 jmethodID** to_dealloc_jmeths_p); |
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611 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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612 size_t *length_p, jmethodID* id_p); |
| 0 | 613 jmethodID jmethod_id_or_null(methodOop method); |
| 614 | |
| 615 // cached itable index support | |
| 616 void set_cached_itable_index(size_t idnum, int index); | |
| 617 int cached_itable_index(size_t idnum); | |
| 618 | |
| 619 // annotations support | |
| 620 typeArrayOop class_annotations() const { return _class_annotations; } | |
| 621 objArrayOop fields_annotations() const { return _fields_annotations; } | |
| 622 objArrayOop methods_annotations() const { return _methods_annotations; } | |
| 623 objArrayOop methods_parameter_annotations() const { return _methods_parameter_annotations; } | |
| 624 objArrayOop methods_default_annotations() const { return _methods_default_annotations; } | |
| 625 void set_class_annotations(typeArrayOop md) { oop_store_without_check((oop*)&_class_annotations, (oop)md); } | |
| 626 void set_fields_annotations(objArrayOop md) { set_annotations(md, &_fields_annotations); } | |
| 627 void set_methods_annotations(objArrayOop md) { set_annotations(md, &_methods_annotations); } | |
| 628 void set_methods_parameter_annotations(objArrayOop md) { set_annotations(md, &_methods_parameter_annotations); } | |
| 629 void set_methods_default_annotations(objArrayOop md) { set_annotations(md, &_methods_default_annotations); } | |
| 630 typeArrayOop get_method_annotations_of(int idnum) | |
| 631 { return get_method_annotations_from(idnum, _methods_annotations); } | |
| 632 typeArrayOop get_method_parameter_annotations_of(int idnum) | |
| 633 { return get_method_annotations_from(idnum, _methods_parameter_annotations); } | |
| 634 typeArrayOop get_method_default_annotations_of(int idnum) | |
| 635 { return get_method_annotations_from(idnum, _methods_default_annotations); } | |
| 636 void set_method_annotations_of(int idnum, typeArrayOop anno) | |
| 637 { set_methods_annotations_of(idnum, anno, &_methods_annotations); } | |
| 638 void set_method_parameter_annotations_of(int idnum, typeArrayOop anno) | |
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639 { set_methods_annotations_of(idnum, anno, &_methods_parameter_annotations); } |
| 0 | 640 void set_method_default_annotations_of(int idnum, typeArrayOop anno) |
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641 { set_methods_annotations_of(idnum, anno, &_methods_default_annotations); } |
| 0 | 642 |
| 643 // allocation | |
| 644 DEFINE_ALLOCATE_PERMANENT(instanceKlass); | |
| 645 instanceOop allocate_instance(TRAPS); | |
| 646 instanceOop allocate_permanent_instance(TRAPS); | |
| 647 | |
| 648 // additional member function to return a handle | |
| 649 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
| 650 | |
| 651 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
| 652 // Helper function | |
| 653 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
| 654 | |
| 655 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
| 656 // if not, throw either an Error or an Exception. | |
| 657 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
| 658 | |
| 659 // initialization | |
| 660 void call_class_initializer(TRAPS); | |
| 661 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
| 662 | |
| 663 // OopMapCache support | |
| 664 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
| 665 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
| 666 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
| 667 | |
| 668 // JNI identifier support (for static fields - for jni performance) | |
| 669 JNIid* jni_ids() { return _jni_ids; } | |
| 670 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
| 671 JNIid* jni_id_for(int offset); | |
| 672 | |
| 673 // maintenance of deoptimization dependencies | |
| 674 int mark_dependent_nmethods(DepChange& changes); | |
| 675 void add_dependent_nmethod(nmethod* nm); | |
| 676 void remove_dependent_nmethod(nmethod* nm); | |
| 677 | |
| 678 // On-stack replacement support | |
| 679 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
| 680 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
| 681 void add_osr_nmethod(nmethod* n); | |
| 682 void remove_osr_nmethod(nmethod* n); | |
| 1783 | 683 nmethod* lookup_osr_nmethod(const methodOop m, int bci, int level, bool match_level) const; |
| 0 | 684 |
| 685 // Breakpoint support (see methods on methodOop for details) | |
| 686 BreakpointInfo* breakpoints() const { return _breakpoints; }; | |
| 687 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
| 688 | |
| 689 // support for stub routines | |
|
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690 static ByteSize init_state_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_state)); } |
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691 TRACE_DEFINE_OFFSET; |
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692 static ByteSize init_thread_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_thread)); } |
| 0 | 693 |
| 694 // subclass/subinterface checks | |
| 695 bool implements_interface(klassOop k) const; | |
| 696 | |
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697 // Access to the implementor of an interface. |
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698 klassOop implementor() const |
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699 { |
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700 klassOop* k = (klassOop*)adr_implementor(); |
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701 if (k == NULL) { |
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702 return NULL; |
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703 } else { |
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704 return *k; |
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705 } |
| 0 | 706 } |
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707 |
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708 void set_implementor(klassOop k) { |
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709 assert(is_interface(), "not interface"); |
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710 oop* addr = adr_implementor(); |
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711 oop_store_without_check(addr, k); |
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712 } |
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713 |
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714 int nof_implementors() const { |
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715 klassOop k = implementor(); |
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716 if (k == NULL) { |
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717 return 0; |
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718 } else if (k != this->as_klassOop()) { |
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719 return 1; |
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720 } else { |
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721 return 2; |
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722 } |
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723 } |
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724 |
| 0 | 725 void add_implementor(klassOop k); // k is a new class that implements this interface |
| 726 void init_implementor(); // initialize | |
| 727 | |
| 728 // link this class into the implementors list of every interface it implements | |
| 729 void process_interfaces(Thread *thread); | |
| 730 | |
| 731 // virtual operations from Klass | |
| 732 bool is_leaf_class() const { return _subklass == NULL; } | |
| 733 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); | |
| 734 bool compute_is_subtype_of(klassOop k); | |
| 735 bool can_be_primary_super_slow() const; | |
| 736 klassOop java_super() const { return super(); } | |
| 737 int oop_size(oop obj) const { return size_helper(); } | |
| 738 int klass_oop_size() const { return object_size(); } | |
| 739 bool oop_is_instance_slow() const { return true; } | |
| 740 | |
| 741 // Iterators | |
| 742 void do_local_static_fields(FieldClosure* cl); | |
| 743 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
| 744 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
| 745 | |
| 746 void methods_do(void f(methodOop method)); | |
| 747 void array_klasses_do(void f(klassOop k)); | |
| 748 void with_array_klasses_do(void f(klassOop k)); | |
| 749 bool super_types_do(SuperTypeClosure* blk); | |
| 750 | |
| 751 // Casting from klassOop | |
| 752 static instanceKlass* cast(klassOop k) { | |
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753 assert(k->is_klass(), "must be"); |
| 0 | 754 Klass* kp = k->klass_part(); |
| 755 assert(kp->null_vtbl() || kp->oop_is_instance_slow(), "cast to instanceKlass"); | |
| 756 return (instanceKlass*) kp; | |
| 757 } | |
| 758 | |
| 759 // Sizing (in words) | |
| 760 static int header_size() { return align_object_offset(oopDesc::header_size() + sizeof(instanceKlass)/HeapWordSize); } | |
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761 |
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762 int object_size() const |
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763 { |
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764 return object_size(align_object_offset(vtable_length()) + |
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765 align_object_offset(itable_length()) + |
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766 ((is_interface() || is_anonymous()) ? |
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767 align_object_offset(nonstatic_oop_map_size()) : |
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768 nonstatic_oop_map_size()) + |
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769 (is_interface() ? (int)sizeof(klassOop)/HeapWordSize : 0) + |
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770 (is_anonymous() ? (int)sizeof(klassOop)/HeapWordSize : 0)); |
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771 } |
| 0 | 772 static int vtable_start_offset() { return header_size(); } |
| 773 static int vtable_length_offset() { return oopDesc::header_size() + offset_of(instanceKlass, _vtable_len) / HeapWordSize; } | |
| 774 static int object_size(int extra) { return align_object_size(header_size() + extra); } | |
| 775 | |
| 776 intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); } | |
| 777 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } | |
| 778 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); } | |
| 779 | |
| 780 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
| 781 | |
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782 address static_field_addr(int offset); |
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783 |
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784 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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785 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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786 } |
| 0 | 787 |
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788 oop* adr_implementor() const { |
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789 if (is_interface()) { |
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790 return (oop*)(start_of_nonstatic_oop_maps() + |
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791 nonstatic_oop_map_count()); |
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792 } else { |
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793 return NULL; |
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794 } |
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795 }; |
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796 |
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797 oop* adr_host_klass() const { |
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798 if (is_anonymous()) { |
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799 oop* adr_impl = adr_implementor(); |
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800 if (adr_impl != NULL) { |
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801 return adr_impl + 1; |
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802 } else { |
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803 return (oop*)(start_of_nonstatic_oop_maps() + |
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804 nonstatic_oop_map_count()); |
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805 } |
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806 } else { |
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807 return NULL; |
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808 } |
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809 } |
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810 |
| 0 | 811 // Allocation profiling support |
| 812 juint alloc_size() const { return _alloc_count * size_helper(); } | |
| 813 void set_alloc_size(juint n) {} | |
| 814 | |
| 815 // Use this to return the size of an instance in heap words: | |
| 816 int size_helper() const { | |
| 817 return layout_helper_to_size_helper(layout_helper()); | |
| 818 } | |
| 819 | |
| 820 // This bit is initialized in classFileParser.cpp. | |
| 821 // It is false under any of the following conditions: | |
| 822 // - the class is abstract (including any interface) | |
| 823 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
| 824 // - the class size is larger than FastAllocateSizeLimit | |
| 825 // - the class is java/lang/Class, which cannot be allocated directly | |
| 826 bool can_be_fastpath_allocated() const { | |
| 827 return !layout_helper_needs_slow_path(layout_helper()); | |
| 828 } | |
| 829 | |
| 830 // Java vtable/itable | |
| 831 klassVtable* vtable() const; // return new klassVtable wrapper | |
| 832 inline methodOop method_at_vtable(int index); | |
| 833 klassItable* itable() const; // return new klassItable wrapper | |
| 834 methodOop method_at_itable(klassOop holder, int index, TRAPS); | |
| 835 | |
| 836 // Garbage collection | |
| 837 void oop_follow_contents(oop obj); | |
| 838 int oop_adjust_pointers(oop obj); | |
| 839 bool object_is_parsable() const { return _init_state != unparsable_by_gc; } | |
| 840 // Value of _init_state must be zero (unparsable_by_gc) when klass field is set. | |
| 841 | |
| 842 void follow_weak_klass_links( | |
| 843 BoolObjectClosure* is_alive, OopClosure* keep_alive); | |
| 844 void release_C_heap_structures(); | |
| 845 | |
| 846 // Parallel Scavenge and Parallel Old | |
| 847 PARALLEL_GC_DECLS | |
| 848 | |
| 849 // Naming | |
|
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850 const char* signature_name() const; |
| 0 | 851 |
| 852 // Iterators | |
| 853 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 854 return oop_oop_iterate_v(obj, blk); | |
| 855 } | |
| 856 | |
| 857 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 858 return oop_oop_iterate_v_m(obj, blk, mr); | |
| 859 } | |
| 860 | |
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861 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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862 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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863 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
| 0 | 864 MemRegion mr); |
| 865 | |
| 866 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
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867 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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868 |
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869 #ifndef SERIALGC |
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870 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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871 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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872 |
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873 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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874 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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875 #endif // !SERIALGC |
| 0 | 876 |
| 877 private: | |
| 878 // initialization state | |
| 879 #ifdef ASSERT | |
| 880 void set_init_state(ClassState state); | |
| 881 #else | |
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882 void set_init_state(ClassState state) { _init_state = (u1)state; } |
| 0 | 883 #endif |
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884 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
| 0 | 885 void set_init_thread(Thread *thread) { _init_thread = thread; } |
| 886 | |
| 887 u2 idnum_allocated_count() const { return _idnum_allocated_count; } | |
|
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888 // The RedefineClasses() API can cause new method idnums to be needed |
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889 // which will cause the caches to grow. Safety requires different |
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890 // cache management logic if the caches can grow instead of just |
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891 // going from NULL to non-NULL. |
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892 bool idnum_can_increment() const { return has_been_redefined(); } |
| 0 | 893 jmethodID* methods_jmethod_ids_acquire() const |
| 894 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
| 895 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
| 896 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
| 897 | |
| 898 int* methods_cached_itable_indices_acquire() const | |
| 899 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
| 900 void release_set_methods_cached_itable_indices(int* indices) | |
| 901 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
| 902 | |
| 903 inline typeArrayOop get_method_annotations_from(int idnum, objArrayOop annos); | |
| 904 void set_annotations(objArrayOop md, objArrayOop* md_p) { oop_store_without_check((oop*)md_p, (oop)md); } | |
| 905 void set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p); | |
| 906 | |
| 907 // Offsets for memory management | |
| 908 oop* adr_array_klasses() const { return (oop*)&this->_array_klasses;} | |
| 909 oop* adr_methods() const { return (oop*)&this->_methods;} | |
| 910 oop* adr_method_ordering() const { return (oop*)&this->_method_ordering;} | |
| 911 oop* adr_local_interfaces() const { return (oop*)&this->_local_interfaces;} | |
| 912 oop* adr_transitive_interfaces() const { return (oop*)&this->_transitive_interfaces;} | |
| 913 oop* adr_fields() const { return (oop*)&this->_fields;} | |
| 914 oop* adr_constants() const { return (oop*)&this->_constants;} | |
| 915 oop* adr_class_loader() const { return (oop*)&this->_class_loader;} | |
| 916 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
| 917 oop* adr_signers() const { return (oop*)&this->_signers;} | |
| 918 oop* adr_inner_classes() const { return (oop*)&this->_inner_classes;} | |
| 919 oop* adr_methods_jmethod_ids() const { return (oop*)&this->_methods_jmethod_ids;} | |
| 920 oop* adr_methods_cached_itable_indices() const { return (oop*)&this->_methods_cached_itable_indices;} | |
| 921 oop* adr_class_annotations() const { return (oop*)&this->_class_annotations;} | |
| 922 oop* adr_fields_annotations() const { return (oop*)&this->_fields_annotations;} | |
| 923 oop* adr_methods_annotations() const { return (oop*)&this->_methods_annotations;} | |
| 924 oop* adr_methods_parameter_annotations() const { return (oop*)&this->_methods_parameter_annotations;} | |
| 925 oop* adr_methods_default_annotations() const { return (oop*)&this->_methods_default_annotations;} | |
| 926 | |
| 927 // Static methods that are used to implement member methods where an exposed this pointer | |
| 928 // is needed due to possible GCs | |
| 929 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
| 930 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
| 931 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
| 932 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
| 933 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
| 934 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
| 935 static klassOop array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); | |
| 936 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); | |
| 937 /* jni_id_for_impl for jfieldID only */ | |
| 938 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
| 939 | |
| 940 // Returns the array class for the n'th dimension | |
| 941 klassOop array_klass_impl(bool or_null, int n, TRAPS); | |
| 942 | |
| 943 // Returns the array class with this class as element type | |
| 944 klassOop array_klass_impl(bool or_null, TRAPS); | |
| 945 | |
| 946 public: | |
| 947 // sharing support | |
| 948 virtual void remove_unshareable_info(); | |
|
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949 virtual void shared_symbols_iterate(SymbolClosure* closure); |
| 0 | 950 |
| 951 // jvm support | |
| 952 jint compute_modifier_flags(TRAPS) const; | |
| 953 | |
| 954 public: | |
| 955 // JVMTI support | |
| 956 jint jvmti_class_status() const; | |
| 957 | |
| 958 public: | |
| 959 // Printing | |
|
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960 void oop_print_value_on(oop obj, outputStream* st); |
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961 #ifndef PRODUCT |
| 0 | 962 void oop_print_on (oop obj, outputStream* st); |
| 963 | |
| 964 void print_dependent_nmethods(bool verbose = false); | |
| 965 bool is_dependent_nmethod(nmethod* nm); | |
| 966 #endif | |
| 967 | |
| 968 // Verification | |
| 969 const char* internal_name() const; | |
| 970 void oop_verify_on(oop obj, outputStream* st); | |
| 971 }; | |
| 972 | |
| 973 inline methodOop instanceKlass::method_at_vtable(int index) { | |
| 974 #ifndef PRODUCT | |
| 975 assert(index >= 0, "valid vtable index"); | |
| 976 if (DebugVtables) { | |
| 977 verify_vtable_index(index); | |
| 978 } | |
| 979 #endif | |
| 980 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
| 981 return ve[index].method(); | |
| 982 } | |
| 983 | |
| 984 inline typeArrayOop instanceKlass::get_method_annotations_from(int idnum, objArrayOop annos) { | |
| 985 if (annos == NULL || annos->length() <= idnum) { | |
| 986 return NULL; | |
| 987 } | |
| 988 return typeArrayOop(annos->obj_at(idnum)); | |
| 989 } | |
| 990 | |
| 991 // for adding methods | |
| 992 // UNSET_IDNUM return means no more ids available | |
| 993 inline u2 instanceKlass::next_method_idnum() { | |
| 994 if (_idnum_allocated_count == constMethodOopDesc::MAX_IDNUM) { | |
| 995 return constMethodOopDesc::UNSET_IDNUM; // no more ids available | |
| 996 } else { | |
| 997 return _idnum_allocated_count++; | |
| 998 } | |
| 999 } | |
| 1000 | |
| 1001 | |
| 1002 /* JNIid class for jfieldIDs only */ | |
| 1003 class JNIid: public CHeapObj { | |
| 1004 friend class VMStructs; | |
| 1005 private: | |
| 1006 klassOop _holder; | |
| 1007 JNIid* _next; | |
| 1008 int _offset; | |
| 1009 #ifdef ASSERT | |
| 1010 bool _is_static_field_id; | |
| 1011 #endif | |
| 1012 | |
| 1013 public: | |
| 1014 // Accessors | |
| 1015 klassOop holder() const { return _holder; } | |
| 1016 int offset() const { return _offset; } | |
| 1017 JNIid* next() { return _next; } | |
| 1018 // Constructor | |
| 1019 JNIid(klassOop holder, int offset, JNIid* next); | |
| 1020 // Identifier lookup | |
| 1021 JNIid* find(int offset); | |
| 1022 | |
|
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1023 bool find_local_field(fieldDescriptor* fd) { |
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1024 return instanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1025 } |
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1026 |
| 0 | 1027 // Garbage collection support |
| 1028 oop* holder_addr() { return (oop*)&_holder; } | |
| 1029 void oops_do(OopClosure* f); | |
| 1030 static void deallocate(JNIid* id); | |
| 1031 // Debugging | |
| 1032 #ifdef ASSERT | |
| 1033 bool is_static_field_id() const { return _is_static_field_id; } | |
| 1034 void set_is_static_field_id() { _is_static_field_id = true; } | |
| 1035 #endif | |
| 1036 void verify(klassOop holder); | |
| 1037 }; | |
| 1038 | |
| 1039 | |
| 1040 // If breakpoints are more numerous than just JVMTI breakpoints, | |
| 1041 // consider compressing this data structure. | |
| 1042 // It is currently a simple linked list defined in methodOop.hpp. | |
| 1043 | |
| 1044 class BreakpointInfo; | |
| 1045 | |
| 1046 | |
| 1047 // A collection point for interesting information about the previous | |
| 1048 // version(s) of an instanceKlass. This class uses weak references to | |
| 1049 // the information so that the information may be collected as needed | |
|
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1050 // by the system. If the information is shared, then a regular |
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1051 // reference must be used because a weak reference would be seen as |
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1052 // collectible. A GrowableArray of PreviousVersionNodes is attached |
| 0 | 1053 // to the instanceKlass as needed. See PreviousVersionWalker below. |
| 1054 class PreviousVersionNode : public CHeapObj { | |
| 1055 private: | |
|
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1056 // A shared ConstantPool is never collected so we'll always have |
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1057 // a reference to it so we can update items in the cache. We'll |
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1058 // have a weak reference to a non-shared ConstantPool until all |
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1059 // of the methods (EMCP or obsolete) have been collected; the |
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1060 // non-shared ConstantPool becomes collectible at that point. |
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1061 jobject _prev_constant_pool; // regular or weak reference |
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1062 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1063 |
| 0 | 1064 // If the previous version of the instanceKlass doesn't have any |
| 1065 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the | |
| 1066 // EMCP methods have been collected, then _prev_EMCP_methods can | |
| 1067 // have a length of zero. | |
| 1068 GrowableArray<jweak>* _prev_EMCP_methods; | |
| 1069 | |
| 1070 public: | |
|
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1071 PreviousVersionNode(jobject prev_constant_pool, bool prev_cp_is_weak, |
| 0 | 1072 GrowableArray<jweak>* prev_EMCP_methods); |
| 1073 ~PreviousVersionNode(); | |
|
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1074 jobject prev_constant_pool() const { |
| 0 | 1075 return _prev_constant_pool; |
| 1076 } | |
| 1077 GrowableArray<jweak>* prev_EMCP_methods() const { | |
| 1078 return _prev_EMCP_methods; | |
| 1079 } | |
| 1080 }; | |
| 1081 | |
| 1082 | |
| 1083 // A Handle-ized version of PreviousVersionNode. | |
| 1084 class PreviousVersionInfo : public ResourceObj { | |
| 1085 private: | |
| 1086 constantPoolHandle _prev_constant_pool_handle; | |
| 1087 // If the previous version of the instanceKlass doesn't have any | |
| 1088 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the | |
| 1089 // methods cannot be collected while we hold a handle, | |
| 1090 // _prev_EMCP_methods should never have a length of zero. | |
| 1091 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
| 1092 | |
| 1093 public: | |
| 1094 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
| 1095 ~PreviousVersionInfo(); | |
| 1096 constantPoolHandle prev_constant_pool_handle() const { | |
| 1097 return _prev_constant_pool_handle; | |
| 1098 } | |
| 1099 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
| 1100 return _prev_EMCP_method_handles; | |
| 1101 } | |
| 1102 }; | |
| 1103 | |
| 1104 | |
| 1105 // Helper object for walking previous versions. This helper cleans up | |
| 1106 // the Handles that it allocates when the helper object is destroyed. | |
| 1107 // The PreviousVersionInfo object returned by next_previous_version() | |
| 1108 // is only valid until a subsequent call to next_previous_version() or | |
| 1109 // the helper object is destroyed. | |
| 1110 class PreviousVersionWalker : public StackObj { | |
| 1111 private: | |
| 1112 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
| 1113 int _current_index; | |
| 1114 // Fields for cleaning up when we are done walking the previous versions: | |
| 1115 // A HandleMark for the PreviousVersionInfo handles: | |
| 1116 HandleMark _hm; | |
| 1117 | |
| 1118 // It would be nice to have a ResourceMark field in this helper also, | |
| 1119 // but the ResourceMark code says to be careful to delete handles held | |
| 1120 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
| 1121 // can't guarantee the order in which the fields are destroyed, we | |
| 1122 // have to let the creator of the PreviousVersionWalker object do | |
| 1123 // the right thing. Also, adding a ResourceMark here causes an | |
| 1124 // include loop. | |
| 1125 | |
| 1126 // A pointer to the current info object so we can handle the deletes. | |
| 1127 PreviousVersionInfo * _current_p; | |
| 1128 | |
| 1129 public: | |
| 1130 PreviousVersionWalker(instanceKlass *ik); | |
| 1131 ~PreviousVersionWalker(); | |
| 1132 | |
| 1133 // Return the interesting information for the next previous version | |
| 1134 // of the klass. Returns NULL if there are no more previous versions. | |
| 1135 PreviousVersionInfo* next_previous_version(); | |
| 1136 }; | |
| 1972 | 1137 |
| 3939 | 1138 |
| 1139 // | |
| 1140 // nmethodBucket is used to record dependent nmethods for | |
| 1141 // deoptimization. nmethod dependencies are actually <klass, method> | |
| 1142 // pairs but we really only care about the klass part for purposes of | |
| 1143 // finding nmethods which might need to be deoptimized. Instead of | |
| 1144 // recording the method, a count of how many times a particular nmethod | |
| 1145 // was recorded is kept. This ensures that any recording errors are | |
| 1146 // noticed since an nmethod should be removed as many times are it's | |
| 1147 // added. | |
| 1148 // | |
| 1149 class nmethodBucket: public CHeapObj { | |
| 1150 friend class VMStructs; | |
| 1151 private: | |
| 1152 nmethod* _nmethod; | |
| 1153 int _count; | |
| 1154 nmethodBucket* _next; | |
| 1155 | |
| 1156 public: | |
| 1157 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
| 1158 _nmethod = nmethod; | |
| 1159 _next = next; | |
| 1160 _count = 1; | |
| 1161 } | |
| 1162 int count() { return _count; } | |
| 1163 int increment() { _count += 1; return _count; } | |
| 1164 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
| 1165 nmethodBucket* next() { return _next; } | |
| 1166 void set_next(nmethodBucket* b) { _next = b; } | |
| 1167 nmethod* get_nmethod() { return _nmethod; } | |
| 1168 }; | |
| 1169 | |
|
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1170 // An iterator that's used to access the inner classes indices in the |
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1171 // instanceKlass::_inner_classes array. |
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1172 class InnerClassesIterator : public StackObj { |
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1173 private: |
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1174 typeArrayHandle _inner_classes; |
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1175 int _length; |
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1176 int _idx; |
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1177 public: |
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1178 |
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1179 InnerClassesIterator(instanceKlassHandle k) { |
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1180 _inner_classes = k->inner_classes(); |
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1181 if (k->inner_classes() != NULL) { |
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1182 _length = _inner_classes->length(); |
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1183 // The inner class array's length should be the multiple of |
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1184 // inner_class_next_offset if it only contains the InnerClasses |
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1185 // attribute data, or it should be |
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1186 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1187 // if it also contains the EnclosingMethod data. |
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1188 assert((_length % instanceKlass::inner_class_next_offset == 0 || |
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1189 _length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size), |
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1190 "just checking"); |
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1191 // Remove the enclosing_method portion if exists. |
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1192 if (_length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size) { |
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1193 _length -= instanceKlass::enclosing_method_attribute_size; |
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1194 } |
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1195 } else { |
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1196 _length = 0; |
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1197 } |
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1198 _idx = 0; |
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1199 } |
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1200 |
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1201 int length() const { |
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1202 return _length; |
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1203 } |
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1204 |
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1205 void next() { |
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1206 _idx += instanceKlass::inner_class_next_offset; |
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1207 } |
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1208 |
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1209 bool done() const { |
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1210 return (_idx >= _length); |
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1211 } |
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1212 |
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1213 u2 inner_class_info_index() const { |
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1214 return _inner_classes->ushort_at( |
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1215 _idx + instanceKlass::inner_class_inner_class_info_offset); |
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1216 } |
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1217 |
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1218 void set_inner_class_info_index(u2 index) { |
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1219 _inner_classes->ushort_at_put( |
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1220 _idx + instanceKlass::inner_class_inner_class_info_offset, index); |
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1221 } |
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1222 |
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1223 u2 outer_class_info_index() const { |
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1224 return _inner_classes->ushort_at( |
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1225 _idx + instanceKlass::inner_class_outer_class_info_offset); |
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1226 } |
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1227 |
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1228 void set_outer_class_info_index(u2 index) { |
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1229 _inner_classes->ushort_at_put( |
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1230 _idx + instanceKlass::inner_class_outer_class_info_offset, index); |
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1231 } |
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1232 |
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1233 u2 inner_name_index() const { |
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1234 return _inner_classes->ushort_at( |
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1235 _idx + instanceKlass::inner_class_inner_name_offset); |
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1236 } |
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1237 |
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1238 void set_inner_name_index(u2 index) { |
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1239 _inner_classes->ushort_at_put( |
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1240 _idx + instanceKlass::inner_class_inner_name_offset, index); |
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1241 } |
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1242 |
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1243 u2 inner_access_flags() const { |
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1244 return _inner_classes->ushort_at( |
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1245 _idx + instanceKlass::inner_class_access_flags_offset); |
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1246 } |
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1247 }; |
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1248 |
| 1972 | 1249 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |