Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.hpp @ 6027:8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
Summary: Removed the HeapRegion::_top_at_conc_mark_count field. It is no longer needed as a result of the changes for 6888336 and 7127706. Refactored the closures that finalize and verify the liveness counting data so that common functionality was placed into a base class.
Reviewed-by: brutisso, tonyp
author | johnc |
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date | Wed, 25 Apr 2012 10:23:12 -0700 |
parents | 0105f367a14c |
children | 8bafad97cd26 |
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 |
0 | 81 |
82 | |
83 // forward declaration for class -- see below for definition | |
84 class SuperTypeClosure; | |
85 class JNIid; | |
86 class jniIdMapBase; | |
87 class BreakpointInfo; | |
88 class fieldDescriptor; | |
89 class DepChange; | |
90 class nmethodBucket; | |
91 class PreviousVersionNode; | |
92 class JvmtiCachedClassFieldMap; | |
93 | |
94 // This is used in iterators below. | |
95 class FieldClosure: public StackObj { | |
96 public: | |
97 virtual void do_field(fieldDescriptor* fd) = 0; | |
98 }; | |
99 | |
100 #ifndef PRODUCT | |
101 // Print fields. | |
102 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. | |
103 class FieldPrinter: public FieldClosure { | |
104 oop _obj; | |
105 outputStream* _st; | |
106 public: | |
107 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} | |
108 void do_field(fieldDescriptor* fd); | |
109 }; | |
110 #endif // !PRODUCT | |
111 | |
938 | 112 // ValueObjs embedded in klass. Describes where oops are located in instances of |
113 // this klass. | |
114 class OopMapBlock VALUE_OBJ_CLASS_SPEC { | |
115 public: | |
116 // Byte offset of the first oop mapped by this block. | |
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117 int offset() const { return _offset; } |
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118 void set_offset(int offset) { _offset = offset; } |
938 | 119 |
120 // Number of oops in this block. | |
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121 uint count() const { return _count; } |
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122 void set_count(uint count) { _count = count; } |
938 | 123 |
124 // sizeof(OopMapBlock) in HeapWords. | |
125 static const int size_in_words() { | |
126 return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >> | |
127 LogHeapWordSize; | |
128 } | |
129 | |
130 private: | |
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131 int _offset; |
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132 uint _count; |
938 | 133 }; |
134 | |
0 | 135 class instanceKlass: public Klass { |
136 friend class VMStructs; | |
137 public: | |
138 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description | |
139 // of the class loading & initialization procedure, and the use of the states. | |
140 enum ClassState { | |
141 unparsable_by_gc = 0, // object is not yet parsable by gc. Value of _init_state at object allocation. | |
142 allocated, // allocated (but not yet linked) | |
143 loaded, // loaded and inserted in class hierarchy (but not linked yet) | |
144 linked, // successfully linked/verified (but not initialized yet) | |
145 being_initialized, // currently running class initializer | |
146 fully_initialized, // initialized (successfull final state) | |
147 initialization_error // error happened during initialization | |
148 }; | |
149 | |
150 public: | |
151 oop* oop_block_beg() const { return adr_array_klasses(); } | |
152 oop* oop_block_end() const { return adr_methods_default_annotations() + 1; } | |
153 | |
154 protected: | |
155 // | |
156 // The oop block. See comment in klass.hpp before making changes. | |
157 // | |
158 | |
159 // Array classes holding elements of this class. | |
160 klassOop _array_klasses; | |
161 // Method array. | |
162 objArrayOop _methods; | |
163 // Int array containing the original order of method in the class file (for | |
164 // JVMTI). | |
165 typeArrayOop _method_ordering; | |
166 // Interface (klassOops) this class declares locally to implement. | |
167 objArrayOop _local_interfaces; | |
168 // Interface (klassOops) this class implements transitively. | |
169 objArrayOop _transitive_interfaces; | |
170 // Instance and static variable information, 5-tuples of shorts [access, name | |
171 // index, sig index, initval index, offset]. | |
172 typeArrayOop _fields; | |
173 // Constant pool for this class. | |
174 constantPoolOop _constants; | |
175 // Class loader used to load this class, NULL if VM loader used. | |
176 oop _class_loader; | |
177 // Protection domain. | |
178 oop _protection_domain; | |
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179 // Host class, which grants its access privileges to this class also. |
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180 // This is only non-null for an anonymous class (JSR 292 enabled). |
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181 // The host class is either named, or a previously loaded anonymous class. |
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182 klassOop _host_klass; |
0 | 183 // Class signers. |
184 objArrayOop _signers; | |
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185 // The InnerClasses attribute and EnclosingMethod attribute. The |
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186 // _inner_classes is an array of shorts. If the class has InnerClasses |
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187 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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188 // [inner_class_info_index, outer_class_info_index, |
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189 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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190 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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191 // last two shorts [class_index, method_index] of the array. If only |
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192 // the InnerClasses attribute exists, the _inner_classes array length is |
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193 // number_of_inner_classes * 4. If the class has both InnerClasses |
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194 // and EnclosingMethod attributes the _inner_classes array length is |
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195 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
0 | 196 typeArrayOop _inner_classes; |
197 // Annotations for this class, or null if none. | |
198 typeArrayOop _class_annotations; | |
199 // Annotation objects (byte arrays) for fields, or null if no annotations. | |
200 // Indices correspond to entries (not indices) in fields array. | |
201 objArrayOop _fields_annotations; | |
202 // Annotation objects (byte arrays) for methods, or null if no annotations. | |
203 // Index is the idnum, which is initially the same as the methods array index. | |
204 objArrayOop _methods_annotations; | |
205 // Annotation objects (byte arrays) for methods' parameters, or null if no | |
206 // such annotations. | |
207 // Index is the idnum, which is initially the same as the methods array index. | |
208 objArrayOop _methods_parameter_annotations; | |
209 // Annotation objects (byte arrays) for methods' default values, or null if no | |
210 // such annotations. | |
211 // Index is the idnum, which is initially the same as the methods array index. | |
212 objArrayOop _methods_default_annotations; | |
213 | |
214 // | |
215 // End of the oop block. | |
216 // | |
217 | |
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218 // Name of source file containing this klass, NULL if not specified. |
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219 Symbol* _source_file_name; |
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220 // the source debug extension for this klass, NULL if not specified. |
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221 Symbol* _source_debug_extension; |
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222 // Generic signature, or null if none. |
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223 Symbol* _generic_signature; |
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224 // Array name derived from this class which needs unreferencing |
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225 // if this class is unloaded. |
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226 Symbol* _array_name; |
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227 |
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228 // Number of heapOopSize words used by non-static fields in this klass |
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229 // (including inherited fields but after header_size()). |
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230 int _nonstatic_field_size; |
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231 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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232 u2 _static_oop_field_count;// number of static oop fields in this klass |
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233 u2 _java_fields_count; // The number of declared Java fields |
938 | 234 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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235 |
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236 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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237 bool _rewritten; // methods rewritten. |
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238 bool _has_nonstatic_fields; // for sizing with UseCompressedOops |
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239 bool _should_verify_class; // allow caching of preverification |
0 | 240 u2 _minor_version; // minor version number of class file |
241 u2 _major_version; // major version number of class file | |
242 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
243 int _vtable_len; // length of Java vtable (in words) | |
244 int _itable_len; // length of Java itable (in words) | |
245 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
246 JNIid* _jni_ids; // First JNI identifier for static fields in this class | |
247 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
248 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
249 nmethodBucket* _dependencies; // list of dependent nmethods | |
250 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
251 BreakpointInfo* _breakpoints; // bpt lists, managed by methodOop | |
252 // Array of interesting part(s) of the previous version(s) of this | |
253 // instanceKlass. See PreviousVersionWalker below. | |
254 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
255 // JVMTI fields can be moved to their own structure - see 6315920 | |
256 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
257 jint _cached_class_file_len; // JVMTI: length of above | |
258 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration | |
259 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change | |
260 | |
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261 // Class states are defined as ClassState (see above). |
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262 // Place the _init_state here to utilize the unused 2-byte after |
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263 // _idnum_allocated_count. |
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264 u1 _init_state; // state of class |
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265 |
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266 u1 _reference_type; // reference type |
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267 |
0 | 268 // embedded Java vtable follows here |
269 // embedded Java itables follows here | |
270 // embedded static fields follows here | |
271 // embedded nonstatic oop-map blocks follows here | |
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272 // embedded implementor of this interface follows here |
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273 // The embedded implementor only exists if the current klass is an |
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274 // iterface. The possible values of the implementor fall into following |
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275 // three cases: |
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276 // NULL: no implementor. |
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277 // A klassOop that's not itself: one implementor. |
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278 // Itsef: more than one implementors. |
0 | 279 |
280 friend class instanceKlassKlass; | |
281 friend class SystemDictionary; | |
282 | |
283 public: | |
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284 bool has_nonstatic_fields() const { return _has_nonstatic_fields; } |
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285 void set_has_nonstatic_fields(bool b) { _has_nonstatic_fields = b; } |
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286 |
0 | 287 // field sizes |
288 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
289 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
290 | |
291 int static_field_size() const { return _static_field_size; } | |
292 void set_static_field_size(int size) { _static_field_size = size; } | |
293 | |
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294 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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295 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 296 |
297 // Java vtable | |
298 int vtable_length() const { return _vtable_len; } | |
299 void set_vtable_length(int len) { _vtable_len = len; } | |
300 | |
301 // Java itable | |
302 int itable_length() const { return _itable_len; } | |
303 void set_itable_length(int len) { _itable_len = len; } | |
304 | |
305 // array klasses | |
306 klassOop array_klasses() const { return _array_klasses; } | |
307 void set_array_klasses(klassOop k) { oop_store_without_check((oop*) &_array_klasses, (oop) k); } | |
308 | |
309 // methods | |
310 objArrayOop methods() const { return _methods; } | |
311 void set_methods(objArrayOop a) { oop_store_without_check((oop*) &_methods, (oop) a); } | |
312 methodOop method_with_idnum(int idnum); | |
313 | |
314 // method ordering | |
315 typeArrayOop method_ordering() const { return _method_ordering; } | |
316 void set_method_ordering(typeArrayOop m) { oop_store_without_check((oop*) &_method_ordering, (oop) m); } | |
317 | |
318 // interfaces | |
319 objArrayOop local_interfaces() const { return _local_interfaces; } | |
320 void set_local_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_local_interfaces, (oop) a); } | |
321 objArrayOop transitive_interfaces() const { return _transitive_interfaces; } | |
322 void set_transitive_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_transitive_interfaces, (oop) a); } | |
323 | |
3938 | 324 private: |
325 friend class fieldDescriptor; | |
326 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
327 | |
328 public: | |
329 int field_offset (int index) const { return field(index)->offset(); } | |
330 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
331 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
332 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
333 | |
334 // Number of Java declared fields | |
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335 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 336 |
337 // Number of fields including any injected fields | |
338 int all_fields_count() const { return _fields->length() / sizeof(FieldInfo::field_slots); } | |
0 | 339 |
340 typeArrayOop fields() const { return _fields; } | |
3938 | 341 |
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342 void set_fields(typeArrayOop f, u2 java_fields_count) { |
3938 | 343 oop_store_without_check((oop*) &_fields, (oop) f); |
344 _java_fields_count = java_fields_count; | |
0 | 345 } |
346 | |
347 // inner classes | |
348 typeArrayOop inner_classes() const { return _inner_classes; } | |
349 void set_inner_classes(typeArrayOop f) { oop_store_without_check((oop*) &_inner_classes, (oop) f); } | |
350 | |
351 enum InnerClassAttributeOffset { | |
352 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
353 inner_class_inner_class_info_offset = 0, | |
354 inner_class_outer_class_info_offset = 1, | |
355 inner_class_inner_name_offset = 2, | |
356 inner_class_access_flags_offset = 3, | |
357 inner_class_next_offset = 4 | |
358 }; | |
359 | |
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360 enum EnclosingMethodAttributeOffset { |
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361 enclosing_method_class_index_offset = 0, |
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362 enclosing_method_method_index_offset = 1, |
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363 enclosing_method_attribute_size = 2 |
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364 }; |
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365 |
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366 // method override check |
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367 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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368 |
0 | 369 // package |
370 bool is_same_class_package(klassOop class2); | |
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371 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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372 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 373 |
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374 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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375 klassOop compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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376 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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377 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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378 } |
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379 static klassOop compute_enclosing_class_impl(instanceKlassHandle self, |
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380 bool* inner_is_member, TRAPS); |
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381 |
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382 // tell if two classes have the same enclosing class (at package level) |
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383 bool is_same_package_member(klassOop class2, TRAPS) { |
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384 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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385 return is_same_package_member_impl(self, class2, THREAD); |
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386 } |
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387 static bool is_same_package_member_impl(instanceKlassHandle self, |
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388 klassOop class2, TRAPS); |
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389 |
0 | 390 // initialization state |
391 bool is_loaded() const { return _init_state >= loaded; } | |
392 bool is_linked() const { return _init_state >= linked; } | |
393 bool is_initialized() const { return _init_state == fully_initialized; } | |
394 bool is_not_initialized() const { return _init_state < being_initialized; } | |
395 bool is_being_initialized() const { return _init_state == being_initialized; } | |
396 bool is_in_error_state() const { return _init_state == initialization_error; } | |
397 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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398 ClassState init_state() { return (ClassState)_init_state; } |
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399 bool is_rewritten() const { return _rewritten; } |
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400 |
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401 // defineClass specified verification |
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402 bool should_verify_class() const { return _should_verify_class; } |
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403 void set_should_verify_class(bool value) { _should_verify_class = value; } |
0 | 404 |
405 // marking | |
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406 bool is_marked_dependent() const { return _is_marked_dependent; } |
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407 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 408 |
409 // initialization (virtuals from Klass) | |
410 bool should_be_initialized() const; // means that initialize should be called | |
411 void initialize(TRAPS); | |
412 void link_class(TRAPS); | |
413 bool link_class_or_fail(TRAPS); // returns false on failure | |
414 void unlink_class(); | |
415 void rewrite_class(TRAPS); | |
3748 | 416 void relocate_and_link_methods(TRAPS); |
0 | 417 methodOop class_initializer(); |
418 | |
419 // set the class to initialized if no static initializer is present | |
420 void eager_initialize(Thread *thread); | |
421 | |
422 // reference type | |
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423 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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424 void set_reference_type(ReferenceType t) { |
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425 assert(t == (u1)t, "overflow"); |
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426 _reference_type = (u1)t; |
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427 } |
0 | 428 |
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429 static ByteSize reference_type_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _reference_type)); } |
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430 |
0 | 431 // find local field, returns true if found |
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432 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 433 // find field in direct superinterfaces, returns the interface in which the field is defined |
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434 klassOop find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 435 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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436 klassOop find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 437 // 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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438 klassOop find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 439 |
440 // find a non-static or static field given its offset within the class. | |
441 bool contains_field_offset(int offset) { | |
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442 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 443 } |
444 | |
445 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
446 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
447 | |
448 // find a local method (returns NULL if not found) | |
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449 methodOop find_method(Symbol* name, Symbol* signature) const; |
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450 static methodOop find_method(objArrayOop methods, Symbol* name, Symbol* signature); |
0 | 451 |
452 // lookup operation (returns NULL if not found) | |
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453 methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 454 |
455 // lookup a method in all the interfaces that this class implements | |
456 // (returns NULL if not found) | |
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457 methodOop lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
0 | 458 |
459 // constant pool | |
460 constantPoolOop constants() const { return _constants; } | |
461 void set_constants(constantPoolOop c) { oop_store_without_check((oop*) &_constants, (oop) c); } | |
462 | |
463 // class loader | |
464 oop class_loader() const { return _class_loader; } | |
465 void set_class_loader(oop l) { oop_store((oop*) &_class_loader, l); } | |
466 | |
467 // protection domain | |
468 oop protection_domain() { return _protection_domain; } | |
469 void set_protection_domain(oop pd) { oop_store((oop*) &_protection_domain, pd); } | |
470 | |
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471 // host class |
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472 oop host_klass() const { return _host_klass; } |
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473 void set_host_klass(oop host) { oop_store((oop*) &_host_klass, host); } |
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474 bool is_anonymous() const { return _host_klass != NULL; } |
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475 |
0 | 476 // signers |
477 objArrayOop signers() const { return _signers; } | |
478 void set_signers(objArrayOop s) { oop_store((oop*) &_signers, oop(s)); } | |
479 | |
480 // source file name | |
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481 Symbol* source_file_name() const { return _source_file_name; } |
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482 void set_source_file_name(Symbol* n); |
0 | 483 |
484 // minor and major version numbers of class file | |
485 u2 minor_version() const { return _minor_version; } | |
486 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
487 u2 major_version() const { return _major_version; } | |
488 void set_major_version(u2 major_version) { _major_version = major_version; } | |
489 | |
490 // source debug extension | |
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491 Symbol* source_debug_extension() const { return _source_debug_extension; } |
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492 void set_source_debug_extension(Symbol* n); |
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493 |
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494 // symbol unloading support (refcount already added) |
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495 Symbol* array_name() { return _array_name; } |
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496 void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; } |
0 | 497 |
498 // nonstatic oop-map blocks | |
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499 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
938 | 500 return oop_map_count * OopMapBlock::size_in_words(); |
501 } | |
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502 unsigned int nonstatic_oop_map_count() const { |
938 | 503 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
504 } | |
505 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
506 void set_nonstatic_oop_map_size(int words) { | |
507 _nonstatic_oop_map_size = words; | |
508 } | |
0 | 509 |
510 // RedefineClasses() support for previous versions: | |
511 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
512 int emcp_method_count); | |
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513 // If the _previous_versions array is non-NULL, then this klass |
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514 // has been redefined at least once even if we aren't currently |
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515 // tracking a previous version. |
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516 bool has_been_redefined() const { return _previous_versions != NULL; } |
0 | 517 bool has_previous_version() const; |
518 void init_previous_versions() { | |
519 _previous_versions = NULL; | |
520 } | |
521 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
522 return _previous_versions; | |
523 } | |
524 | |
525 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation | |
526 void set_cached_class_file(unsigned char *class_file_bytes, | |
527 jint class_file_len) { _cached_class_file_len = class_file_len; | |
528 _cached_class_file_bytes = class_file_bytes; } | |
529 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
530 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
531 | |
532 // JVMTI: Support for caching of field indices, types, and offsets | |
533 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
534 _jvmti_cached_class_field_map = descriptor; | |
535 } | |
536 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
537 return _jvmti_cached_class_field_map; | |
538 } | |
539 | |
540 // for adding methods, constMethodOopDesc::UNSET_IDNUM means no more ids available | |
541 inline u2 next_method_idnum(); | |
542 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
543 | |
544 // generics support | |
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545 Symbol* generic_signature() const { return _generic_signature; } |
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546 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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547 |
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548 u2 enclosing_method_data(int offset); |
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549 u2 enclosing_method_class_index() { |
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550 return enclosing_method_data(enclosing_method_class_index_offset); |
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551 } |
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552 u2 enclosing_method_method_index() { |
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553 return enclosing_method_data(enclosing_method_method_index_offset); |
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554 } |
0 | 555 void set_enclosing_method_indices(u2 class_index, |
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556 u2 method_index); |
0 | 557 |
558 // jmethodID support | |
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559 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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560 methodHandle method_h); |
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561 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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562 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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563 jmethodID* to_dealloc_id_p, |
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564 jmethodID** to_dealloc_jmeths_p); |
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565 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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566 size_t *length_p, jmethodID* id_p); |
0 | 567 jmethodID jmethod_id_or_null(methodOop method); |
568 | |
569 // cached itable index support | |
570 void set_cached_itable_index(size_t idnum, int index); | |
571 int cached_itable_index(size_t idnum); | |
572 | |
573 // annotations support | |
574 typeArrayOop class_annotations() const { return _class_annotations; } | |
575 objArrayOop fields_annotations() const { return _fields_annotations; } | |
576 objArrayOop methods_annotations() const { return _methods_annotations; } | |
577 objArrayOop methods_parameter_annotations() const { return _methods_parameter_annotations; } | |
578 objArrayOop methods_default_annotations() const { return _methods_default_annotations; } | |
579 void set_class_annotations(typeArrayOop md) { oop_store_without_check((oop*)&_class_annotations, (oop)md); } | |
580 void set_fields_annotations(objArrayOop md) { set_annotations(md, &_fields_annotations); } | |
581 void set_methods_annotations(objArrayOop md) { set_annotations(md, &_methods_annotations); } | |
582 void set_methods_parameter_annotations(objArrayOop md) { set_annotations(md, &_methods_parameter_annotations); } | |
583 void set_methods_default_annotations(objArrayOop md) { set_annotations(md, &_methods_default_annotations); } | |
584 typeArrayOop get_method_annotations_of(int idnum) | |
585 { return get_method_annotations_from(idnum, _methods_annotations); } | |
586 typeArrayOop get_method_parameter_annotations_of(int idnum) | |
587 { return get_method_annotations_from(idnum, _methods_parameter_annotations); } | |
588 typeArrayOop get_method_default_annotations_of(int idnum) | |
589 { return get_method_annotations_from(idnum, _methods_default_annotations); } | |
590 void set_method_annotations_of(int idnum, typeArrayOop anno) | |
591 { set_methods_annotations_of(idnum, anno, &_methods_annotations); } | |
592 void set_method_parameter_annotations_of(int idnum, typeArrayOop anno) | |
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593 { set_methods_annotations_of(idnum, anno, &_methods_parameter_annotations); } |
0 | 594 void set_method_default_annotations_of(int idnum, typeArrayOop anno) |
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595 { set_methods_annotations_of(idnum, anno, &_methods_default_annotations); } |
0 | 596 |
597 // allocation | |
598 DEFINE_ALLOCATE_PERMANENT(instanceKlass); | |
599 instanceOop allocate_instance(TRAPS); | |
600 instanceOop allocate_permanent_instance(TRAPS); | |
601 | |
602 // additional member function to return a handle | |
603 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
604 | |
605 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
606 // Helper function | |
607 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
608 | |
609 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
610 // if not, throw either an Error or an Exception. | |
611 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
612 | |
613 // initialization | |
614 void call_class_initializer(TRAPS); | |
615 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
616 | |
617 // OopMapCache support | |
618 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
619 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
620 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
621 | |
622 // JNI identifier support (for static fields - for jni performance) | |
623 JNIid* jni_ids() { return _jni_ids; } | |
624 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
625 JNIid* jni_id_for(int offset); | |
626 | |
627 // maintenance of deoptimization dependencies | |
628 int mark_dependent_nmethods(DepChange& changes); | |
629 void add_dependent_nmethod(nmethod* nm); | |
630 void remove_dependent_nmethod(nmethod* nm); | |
631 | |
632 // On-stack replacement support | |
633 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
634 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
635 void add_osr_nmethod(nmethod* n); | |
636 void remove_osr_nmethod(nmethod* n); | |
1783 | 637 nmethod* lookup_osr_nmethod(const methodOop m, int bci, int level, bool match_level) const; |
0 | 638 |
639 // Breakpoint support (see methods on methodOop for details) | |
640 BreakpointInfo* breakpoints() const { return _breakpoints; }; | |
641 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
642 | |
643 // support for stub routines | |
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644 static ByteSize init_state_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_state)); } |
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645 TRACE_DEFINE_OFFSET; |
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646 static ByteSize init_thread_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_thread)); } |
0 | 647 |
648 // subclass/subinterface checks | |
649 bool implements_interface(klassOop k) const; | |
650 | |
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651 // Access to the implementor of an interface. |
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652 klassOop implementor() const |
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653 { |
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654 klassOop* k = start_of_implementor(); |
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655 if (k == NULL) { |
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656 return NULL; |
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657 } else { |
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658 return *k; |
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659 } |
0 | 660 } |
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661 |
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662 void set_implementor(klassOop k) { |
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663 assert(is_interface(), "not interface"); |
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664 oop* addr = (oop*)start_of_implementor(); |
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665 oop_store_without_check(addr, k); |
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666 } |
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667 |
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668 int nof_implementors() const { |
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669 klassOop k = implementor(); |
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670 if (k == NULL) { |
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671 return 0; |
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672 } else if (k != this->as_klassOop()) { |
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673 return 1; |
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674 } else { |
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675 return 2; |
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676 } |
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677 } |
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678 |
0 | 679 void add_implementor(klassOop k); // k is a new class that implements this interface |
680 void init_implementor(); // initialize | |
681 | |
682 // link this class into the implementors list of every interface it implements | |
683 void process_interfaces(Thread *thread); | |
684 | |
685 // virtual operations from Klass | |
686 bool is_leaf_class() const { return _subklass == NULL; } | |
687 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); | |
688 bool compute_is_subtype_of(klassOop k); | |
689 bool can_be_primary_super_slow() const; | |
690 klassOop java_super() const { return super(); } | |
691 int oop_size(oop obj) const { return size_helper(); } | |
692 int klass_oop_size() const { return object_size(); } | |
693 bool oop_is_instance_slow() const { return true; } | |
694 | |
695 // Iterators | |
696 void do_local_static_fields(FieldClosure* cl); | |
697 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
698 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
699 | |
700 void methods_do(void f(methodOop method)); | |
701 void array_klasses_do(void f(klassOop k)); | |
702 void with_array_klasses_do(void f(klassOop k)); | |
703 bool super_types_do(SuperTypeClosure* blk); | |
704 | |
705 // Casting from klassOop | |
706 static instanceKlass* cast(klassOop k) { | |
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707 assert(k->is_klass(), "must be"); |
0 | 708 Klass* kp = k->klass_part(); |
709 assert(kp->null_vtbl() || kp->oop_is_instance_slow(), "cast to instanceKlass"); | |
710 return (instanceKlass*) kp; | |
711 } | |
712 | |
713 // Sizing (in words) | |
714 static int header_size() { return align_object_offset(oopDesc::header_size() + sizeof(instanceKlass)/HeapWordSize); } | |
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715 |
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716 int object_size() const |
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717 { |
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718 return object_size(align_object_offset(vtable_length()) + |
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719 align_object_offset(itable_length()) + |
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720 (is_interface() ? |
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721 (align_object_offset(nonstatic_oop_map_size()) + (int)sizeof(klassOop)/HeapWordSize) : |
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722 nonstatic_oop_map_size())); |
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723 } |
0 | 724 static int vtable_start_offset() { return header_size(); } |
725 static int vtable_length_offset() { return oopDesc::header_size() + offset_of(instanceKlass, _vtable_len) / HeapWordSize; } | |
726 static int object_size(int extra) { return align_object_size(header_size() + extra); } | |
727 | |
728 intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); } | |
729 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } | |
730 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); } | |
731 | |
732 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
733 | |
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734 address static_field_addr(int offset); |
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735 |
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736 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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737 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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738 } |
0 | 739 |
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740 klassOop* start_of_implementor() const { |
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741 if (is_interface()) { |
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742 return (klassOop*)(start_of_nonstatic_oop_maps() + |
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743 nonstatic_oop_map_count()); |
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744 } else { |
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745 return NULL; |
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746 } |
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747 }; |
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748 |
0 | 749 // Allocation profiling support |
750 juint alloc_size() const { return _alloc_count * size_helper(); } | |
751 void set_alloc_size(juint n) {} | |
752 | |
753 // Use this to return the size of an instance in heap words: | |
754 int size_helper() const { | |
755 return layout_helper_to_size_helper(layout_helper()); | |
756 } | |
757 | |
758 // This bit is initialized in classFileParser.cpp. | |
759 // It is false under any of the following conditions: | |
760 // - the class is abstract (including any interface) | |
761 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
762 // - the class size is larger than FastAllocateSizeLimit | |
763 // - the class is java/lang/Class, which cannot be allocated directly | |
764 bool can_be_fastpath_allocated() const { | |
765 return !layout_helper_needs_slow_path(layout_helper()); | |
766 } | |
767 | |
768 // Java vtable/itable | |
769 klassVtable* vtable() const; // return new klassVtable wrapper | |
770 inline methodOop method_at_vtable(int index); | |
771 klassItable* itable() const; // return new klassItable wrapper | |
772 methodOop method_at_itable(klassOop holder, int index, TRAPS); | |
773 | |
774 // Garbage collection | |
775 void oop_follow_contents(oop obj); | |
776 int oop_adjust_pointers(oop obj); | |
777 bool object_is_parsable() const { return _init_state != unparsable_by_gc; } | |
778 // Value of _init_state must be zero (unparsable_by_gc) when klass field is set. | |
779 | |
780 void follow_weak_klass_links( | |
781 BoolObjectClosure* is_alive, OopClosure* keep_alive); | |
782 void release_C_heap_structures(); | |
783 | |
784 // Parallel Scavenge and Parallel Old | |
785 PARALLEL_GC_DECLS | |
786 | |
787 // Naming | |
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788 const char* signature_name() const; |
0 | 789 |
790 // Iterators | |
791 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
792 return oop_oop_iterate_v(obj, blk); | |
793 } | |
794 | |
795 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
796 return oop_oop_iterate_v_m(obj, blk, mr); | |
797 } | |
798 | |
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799 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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800 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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801 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 802 MemRegion mr); |
803 | |
804 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
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805 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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806 |
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807 #ifndef SERIALGC |
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808 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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809 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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810 |
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811 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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812 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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813 #endif // !SERIALGC |
0 | 814 |
815 private: | |
816 // initialization state | |
817 #ifdef ASSERT | |
818 void set_init_state(ClassState state); | |
819 #else | |
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820 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 821 #endif |
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822 void set_rewritten() { _rewritten = true; } |
0 | 823 void set_init_thread(Thread *thread) { _init_thread = thread; } |
824 | |
825 u2 idnum_allocated_count() const { return _idnum_allocated_count; } | |
977
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826 // The RedefineClasses() API can cause new method idnums to be needed |
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827 // which will cause the caches to grow. Safety requires different |
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828 // cache management logic if the caches can grow instead of just |
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829 // going from NULL to non-NULL. |
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830 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 831 jmethodID* methods_jmethod_ids_acquire() const |
832 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
833 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
834 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
835 | |
836 int* methods_cached_itable_indices_acquire() const | |
837 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
838 void release_set_methods_cached_itable_indices(int* indices) | |
839 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
840 | |
841 inline typeArrayOop get_method_annotations_from(int idnum, objArrayOop annos); | |
842 void set_annotations(objArrayOop md, objArrayOop* md_p) { oop_store_without_check((oop*)md_p, (oop)md); } | |
843 void set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p); | |
844 | |
845 // Offsets for memory management | |
846 oop* adr_array_klasses() const { return (oop*)&this->_array_klasses;} | |
847 oop* adr_methods() const { return (oop*)&this->_methods;} | |
848 oop* adr_method_ordering() const { return (oop*)&this->_method_ordering;} | |
849 oop* adr_local_interfaces() const { return (oop*)&this->_local_interfaces;} | |
850 oop* adr_transitive_interfaces() const { return (oop*)&this->_transitive_interfaces;} | |
851 oop* adr_fields() const { return (oop*)&this->_fields;} | |
852 oop* adr_constants() const { return (oop*)&this->_constants;} | |
853 oop* adr_class_loader() const { return (oop*)&this->_class_loader;} | |
854 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
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855 oop* adr_host_klass() const { return (oop*)&this->_host_klass;} |
0 | 856 oop* adr_signers() const { return (oop*)&this->_signers;} |
857 oop* adr_inner_classes() const { return (oop*)&this->_inner_classes;} | |
5998
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858 oop* adr_implementor() const { return (oop*)start_of_implementor(); } |
0 | 859 oop* adr_methods_jmethod_ids() const { return (oop*)&this->_methods_jmethod_ids;} |
860 oop* adr_methods_cached_itable_indices() const { return (oop*)&this->_methods_cached_itable_indices;} | |
861 oop* adr_class_annotations() const { return (oop*)&this->_class_annotations;} | |
862 oop* adr_fields_annotations() const { return (oop*)&this->_fields_annotations;} | |
863 oop* adr_methods_annotations() const { return (oop*)&this->_methods_annotations;} | |
864 oop* adr_methods_parameter_annotations() const { return (oop*)&this->_methods_parameter_annotations;} | |
865 oop* adr_methods_default_annotations() const { return (oop*)&this->_methods_default_annotations;} | |
866 | |
867 // Static methods that are used to implement member methods where an exposed this pointer | |
868 // is needed due to possible GCs | |
869 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
870 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
871 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
872 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
873 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
874 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
875 static klassOop array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); | |
876 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); | |
877 /* jni_id_for_impl for jfieldID only */ | |
878 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
879 | |
880 // Returns the array class for the n'th dimension | |
881 klassOop array_klass_impl(bool or_null, int n, TRAPS); | |
882 | |
883 // Returns the array class with this class as element type | |
884 klassOop array_klass_impl(bool or_null, TRAPS); | |
885 | |
886 public: | |
887 // sharing support | |
888 virtual void remove_unshareable_info(); | |
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889 virtual void shared_symbols_iterate(SymbolClosure* closure); |
0 | 890 |
891 // jvm support | |
892 jint compute_modifier_flags(TRAPS) const; | |
893 | |
894 public: | |
895 // JVMTI support | |
896 jint jvmti_class_status() const; | |
897 | |
898 public: | |
899 // Printing | |
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900 void oop_print_value_on(oop obj, outputStream* st); |
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901 #ifndef PRODUCT |
0 | 902 void oop_print_on (oop obj, outputStream* st); |
903 | |
904 void print_dependent_nmethods(bool verbose = false); | |
905 bool is_dependent_nmethod(nmethod* nm); | |
906 #endif | |
907 | |
908 // Verification | |
909 const char* internal_name() const; | |
910 void oop_verify_on(oop obj, outputStream* st); | |
911 }; | |
912 | |
913 inline methodOop instanceKlass::method_at_vtable(int index) { | |
914 #ifndef PRODUCT | |
915 assert(index >= 0, "valid vtable index"); | |
916 if (DebugVtables) { | |
917 verify_vtable_index(index); | |
918 } | |
919 #endif | |
920 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
921 return ve[index].method(); | |
922 } | |
923 | |
924 inline typeArrayOop instanceKlass::get_method_annotations_from(int idnum, objArrayOop annos) { | |
925 if (annos == NULL || annos->length() <= idnum) { | |
926 return NULL; | |
927 } | |
928 return typeArrayOop(annos->obj_at(idnum)); | |
929 } | |
930 | |
931 // for adding methods | |
932 // UNSET_IDNUM return means no more ids available | |
933 inline u2 instanceKlass::next_method_idnum() { | |
934 if (_idnum_allocated_count == constMethodOopDesc::MAX_IDNUM) { | |
935 return constMethodOopDesc::UNSET_IDNUM; // no more ids available | |
936 } else { | |
937 return _idnum_allocated_count++; | |
938 } | |
939 } | |
940 | |
941 | |
942 /* JNIid class for jfieldIDs only */ | |
943 class JNIid: public CHeapObj { | |
944 friend class VMStructs; | |
945 private: | |
946 klassOop _holder; | |
947 JNIid* _next; | |
948 int _offset; | |
949 #ifdef ASSERT | |
950 bool _is_static_field_id; | |
951 #endif | |
952 | |
953 public: | |
954 // Accessors | |
955 klassOop holder() const { return _holder; } | |
956 int offset() const { return _offset; } | |
957 JNIid* next() { return _next; } | |
958 // Constructor | |
959 JNIid(klassOop holder, int offset, JNIid* next); | |
960 // Identifier lookup | |
961 JNIid* find(int offset); | |
962 | |
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963 bool find_local_field(fieldDescriptor* fd) { |
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964 return instanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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965 } |
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966 |
0 | 967 // Garbage collection support |
968 oop* holder_addr() { return (oop*)&_holder; } | |
969 void oops_do(OopClosure* f); | |
970 static void deallocate(JNIid* id); | |
971 // Debugging | |
972 #ifdef ASSERT | |
973 bool is_static_field_id() const { return _is_static_field_id; } | |
974 void set_is_static_field_id() { _is_static_field_id = true; } | |
975 #endif | |
976 void verify(klassOop holder); | |
977 }; | |
978 | |
979 | |
980 // If breakpoints are more numerous than just JVMTI breakpoints, | |
981 // consider compressing this data structure. | |
982 // It is currently a simple linked list defined in methodOop.hpp. | |
983 | |
984 class BreakpointInfo; | |
985 | |
986 | |
987 // A collection point for interesting information about the previous | |
988 // version(s) of an instanceKlass. This class uses weak references to | |
989 // the information so that the information may be collected as needed | |
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990 // by the system. If the information is shared, then a regular |
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991 // reference must be used because a weak reference would be seen as |
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992 // collectible. A GrowableArray of PreviousVersionNodes is attached |
0 | 993 // to the instanceKlass as needed. See PreviousVersionWalker below. |
994 class PreviousVersionNode : public CHeapObj { | |
995 private: | |
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996 // A shared ConstantPool is never collected so we'll always have |
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997 // a reference to it so we can update items in the cache. We'll |
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998 // have a weak reference to a non-shared ConstantPool until all |
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999 // of the methods (EMCP or obsolete) have been collected; the |
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1000 // non-shared ConstantPool becomes collectible at that point. |
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1001 jobject _prev_constant_pool; // regular or weak reference |
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1002 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1003 |
0 | 1004 // If the previous version of the instanceKlass doesn't have any |
1005 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the | |
1006 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1007 // have a length of zero. | |
1008 GrowableArray<jweak>* _prev_EMCP_methods; | |
1009 | |
1010 public: | |
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1011 PreviousVersionNode(jobject prev_constant_pool, bool prev_cp_is_weak, |
0 | 1012 GrowableArray<jweak>* prev_EMCP_methods); |
1013 ~PreviousVersionNode(); | |
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1014 jobject prev_constant_pool() const { |
0 | 1015 return _prev_constant_pool; |
1016 } | |
1017 GrowableArray<jweak>* prev_EMCP_methods() const { | |
1018 return _prev_EMCP_methods; | |
1019 } | |
1020 }; | |
1021 | |
1022 | |
1023 // A Handle-ized version of PreviousVersionNode. | |
1024 class PreviousVersionInfo : public ResourceObj { | |
1025 private: | |
1026 constantPoolHandle _prev_constant_pool_handle; | |
1027 // If the previous version of the instanceKlass doesn't have any | |
1028 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the | |
1029 // methods cannot be collected while we hold a handle, | |
1030 // _prev_EMCP_methods should never have a length of zero. | |
1031 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
1032 | |
1033 public: | |
1034 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
1035 ~PreviousVersionInfo(); | |
1036 constantPoolHandle prev_constant_pool_handle() const { | |
1037 return _prev_constant_pool_handle; | |
1038 } | |
1039 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
1040 return _prev_EMCP_method_handles; | |
1041 } | |
1042 }; | |
1043 | |
1044 | |
1045 // Helper object for walking previous versions. This helper cleans up | |
1046 // the Handles that it allocates when the helper object is destroyed. | |
1047 // The PreviousVersionInfo object returned by next_previous_version() | |
1048 // is only valid until a subsequent call to next_previous_version() or | |
1049 // the helper object is destroyed. | |
1050 class PreviousVersionWalker : public StackObj { | |
1051 private: | |
1052 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
1053 int _current_index; | |
1054 // Fields for cleaning up when we are done walking the previous versions: | |
1055 // A HandleMark for the PreviousVersionInfo handles: | |
1056 HandleMark _hm; | |
1057 | |
1058 // It would be nice to have a ResourceMark field in this helper also, | |
1059 // but the ResourceMark code says to be careful to delete handles held | |
1060 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
1061 // can't guarantee the order in which the fields are destroyed, we | |
1062 // have to let the creator of the PreviousVersionWalker object do | |
1063 // the right thing. Also, adding a ResourceMark here causes an | |
1064 // include loop. | |
1065 | |
1066 // A pointer to the current info object so we can handle the deletes. | |
1067 PreviousVersionInfo * _current_p; | |
1068 | |
1069 public: | |
1070 PreviousVersionWalker(instanceKlass *ik); | |
1071 ~PreviousVersionWalker(); | |
1072 | |
1073 // Return the interesting information for the next previous version | |
1074 // of the klass. Returns NULL if there are no more previous versions. | |
1075 PreviousVersionInfo* next_previous_version(); | |
1076 }; | |
1972 | 1077 |
3939 | 1078 |
1079 // | |
1080 // nmethodBucket is used to record dependent nmethods for | |
1081 // deoptimization. nmethod dependencies are actually <klass, method> | |
1082 // pairs but we really only care about the klass part for purposes of | |
1083 // finding nmethods which might need to be deoptimized. Instead of | |
1084 // recording the method, a count of how many times a particular nmethod | |
1085 // was recorded is kept. This ensures that any recording errors are | |
1086 // noticed since an nmethod should be removed as many times are it's | |
1087 // added. | |
1088 // | |
1089 class nmethodBucket: public CHeapObj { | |
1090 friend class VMStructs; | |
1091 private: | |
1092 nmethod* _nmethod; | |
1093 int _count; | |
1094 nmethodBucket* _next; | |
1095 | |
1096 public: | |
1097 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1098 _nmethod = nmethod; | |
1099 _next = next; | |
1100 _count = 1; | |
1101 } | |
1102 int count() { return _count; } | |
1103 int increment() { _count += 1; return _count; } | |
1104 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1105 nmethodBucket* next() { return _next; } | |
1106 void set_next(nmethodBucket* b) { _next = b; } | |
1107 nmethod* get_nmethod() { return _nmethod; } | |
1108 }; | |
1109 | |
5967
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1110 // An iterator that's used to access the inner classes indices in the |
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1111 // instanceKlass::_inner_classes array. |
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1112 class InnerClassesIterator : public StackObj { |
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1113 private: |
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1114 typeArrayHandle _inner_classes; |
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1115 int _length; |
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1116 int _idx; |
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1117 public: |
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1118 |
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1119 InnerClassesIterator(instanceKlassHandle k) { |
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1120 _inner_classes = k->inner_classes(); |
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1121 if (k->inner_classes() != NULL) { |
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1122 _length = _inner_classes->length(); |
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1123 // The inner class array's length should be the multiple of |
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1124 // inner_class_next_offset if it only contains the InnerClasses |
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1125 // attribute data, or it should be |
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1126 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1127 // if it also contains the EnclosingMethod data. |
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1128 assert((_length % instanceKlass::inner_class_next_offset == 0 || |
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1129 _length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size), |
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1130 "just checking"); |
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1131 // Remove the enclosing_method portion if exists. |
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1132 if (_length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size) { |
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1133 _length -= instanceKlass::enclosing_method_attribute_size; |
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1134 } |
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1135 } else { |
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1136 _length = 0; |
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1137 } |
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1138 _idx = 0; |
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1139 } |
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1140 |
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1141 int length() const { |
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1142 return _length; |
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1143 } |
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1144 |
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1145 void next() { |
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1146 _idx += instanceKlass::inner_class_next_offset; |
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1147 } |
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1148 |
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1149 bool done() const { |
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1150 return (_idx >= _length); |
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1151 } |
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1152 |
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1153 u2 inner_class_info_index() const { |
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1154 return _inner_classes->ushort_at( |
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1155 _idx + instanceKlass::inner_class_inner_class_info_offset); |
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1156 } |
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1157 |
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1158 void set_inner_class_info_index(u2 index) { |
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1159 _inner_classes->ushort_at_put( |
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1160 _idx + instanceKlass::inner_class_inner_class_info_offset, index); |
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1161 } |
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1162 |
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1163 u2 outer_class_info_index() const { |
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1164 return _inner_classes->ushort_at( |
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1165 _idx + instanceKlass::inner_class_outer_class_info_offset); |
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1166 } |
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1167 |
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1168 void set_outer_class_info_index(u2 index) { |
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1169 _inner_classes->ushort_at_put( |
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1170 _idx + instanceKlass::inner_class_outer_class_info_offset, index); |
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1171 } |
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1172 |
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1173 u2 inner_name_index() const { |
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1174 return _inner_classes->ushort_at( |
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1175 _idx + instanceKlass::inner_class_inner_name_offset); |
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1176 } |
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1177 |
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1178 void set_inner_name_index(u2 index) { |
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1179 _inner_classes->ushort_at_put( |
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1180 _idx + instanceKlass::inner_class_inner_name_offset, index); |
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1181 } |
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1182 |
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1183 u2 inner_access_flags() const { |
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1184 return _inner_classes->ushort_at( |
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1185 _idx + instanceKlass::inner_class_access_flags_offset); |
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1186 } |
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1187 }; |
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1188 |
1972 | 1189 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |