Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.hpp @ 6055:35e504cb49a6
7167625: Adjustments for SE-Embedded build process
Summary: Simple change to the SE-Embedded build rules that should not affect any other OpenJDK users.
Reviewed-by: kvn, dholmes
author | collins |
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date | Fri, 11 May 2012 11:30:03 -0700 |
parents | 8bafad97cd26 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP |
26 #define SHARE_VM_OOPS_INSTANCEKLASS_HPP | |
27 | |
28 #include "oops/constMethodOop.hpp" | |
29 #include "oops/constantPoolOop.hpp" | |
3938 | 30 #include "oops/fieldInfo.hpp" |
1972 | 31 #include "oops/instanceOop.hpp" |
32 #include "oops/klassOop.hpp" | |
33 #include "oops/klassVtable.hpp" | |
34 #include "oops/objArrayOop.hpp" | |
35 #include "runtime/handles.hpp" | |
36 #include "runtime/os.hpp" | |
37 #include "utilities/accessFlags.hpp" | |
38 #include "utilities/bitMap.inline.hpp" | |
39 | |
0 | 40 // An instanceKlass is the VM level representation of a Java class. |
41 // It contains all information needed for at class at execution runtime. | |
42 | |
43 // instanceKlass layout: | |
44 // [header ] klassOop | |
45 // [klass pointer ] klassOop | |
46 // [C++ vtbl pointer ] Klass | |
47 // [subtype cache ] Klass | |
48 // [instance size ] Klass | |
49 // [java mirror ] Klass | |
50 // [super ] Klass | |
51 // [access_flags ] Klass | |
52 // [name ] Klass | |
53 // [first subklass ] Klass | |
54 // [next sibling ] Klass | |
55 // [array klasses ] | |
56 // [methods ] | |
57 // [local interfaces ] | |
58 // [transitive interfaces ] | |
59 // [fields ] | |
60 // [constants ] | |
61 // [class loader ] | |
62 // [protection domain ] | |
63 // [signers ] | |
64 // [source file name ] | |
65 // [inner classes ] | |
66 // [static field size ] | |
67 // [nonstatic field size ] | |
68 // [static oop fields size ] | |
69 // [nonstatic oop maps size ] | |
70 // [has finalize method ] | |
71 // [deoptimization mark bit ] | |
72 // [initialization state ] | |
73 // [initializing thread ] | |
74 // [Java vtable length ] | |
75 // [oop map cache (stack maps) ] | |
76 // [EMBEDDED Java vtable ] size in words = vtable_len | |
77 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size | |
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78 // The embedded nonstatic oop-map blocks are short pairs (offset, length) |
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79 // indicating where oops are located in instances of this klass. |
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80 // [EMBEDDED implementor of the interface] only exist for interface |
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81 // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled) |
0 | 82 |
83 | |
84 // forward declaration for class -- see below for definition | |
85 class SuperTypeClosure; | |
86 class JNIid; | |
87 class jniIdMapBase; | |
88 class BreakpointInfo; | |
89 class fieldDescriptor; | |
90 class DepChange; | |
91 class nmethodBucket; | |
92 class PreviousVersionNode; | |
93 class JvmtiCachedClassFieldMap; | |
94 | |
95 // This is used in iterators below. | |
96 class FieldClosure: public StackObj { | |
97 public: | |
98 virtual void do_field(fieldDescriptor* fd) = 0; | |
99 }; | |
100 | |
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); } | |
5998
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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)); |
5998
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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 { |
5998
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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()); |
5998
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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 | |
1155
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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: | |
47
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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 |