Mercurial > hg > graal-compiler
annotate src/share/vm/oops/instanceKlass.hpp @ 6231:7e5976e66c62
7182543: NMT ON: Aggregate a few NMT related bugs
Summary: 1) Fixed MemTrackWorker::generations_in_used() calculation 2) Ensured NMT not to leak memory recorders after shutdown 3) Used ThreadCritical to block safepoint safe threads
Reviewed-by: acorn, coleenp, dholmes, kvn
author | zgu |
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date | Thu, 19 Jul 2012 09:05:42 -0400 |
parents | d2a62e0f25eb |
children | 04ade88d9712 |
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; | |
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171 // Instance and static variable information, starts with 6-tuples of shorts |
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172 // [access, name index, sig index, initval index, low_offset, high_offset] |
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173 // for all fields, followed by the generic signature data at the end of |
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174 // the array. Only fields with generic signature attributes have the generic |
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175 // signature data set in the array. The fields array looks like following: |
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176 // |
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177 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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178 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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179 // ... |
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180 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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181 // [generic signature index] |
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182 // [generic signature index] |
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183 // ... |
0 | 184 typeArrayOop _fields; |
185 // Constant pool for this class. | |
186 constantPoolOop _constants; | |
187 // Class loader used to load this class, NULL if VM loader used. | |
188 oop _class_loader; | |
189 // Protection domain. | |
190 oop _protection_domain; | |
191 // Class signers. | |
192 objArrayOop _signers; | |
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193 // The InnerClasses attribute and EnclosingMethod attribute. The |
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194 // _inner_classes is an array of shorts. If the class has InnerClasses |
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195 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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196 // [inner_class_info_index, outer_class_info_index, |
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197 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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198 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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199 // last two shorts [class_index, method_index] of the array. If only |
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200 // the InnerClasses attribute exists, the _inner_classes array length is |
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201 // number_of_inner_classes * 4. If the class has both InnerClasses |
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202 // and EnclosingMethod attributes the _inner_classes array length is |
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203 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
0 | 204 typeArrayOop _inner_classes; |
205 // Annotations for this class, or null if none. | |
206 typeArrayOop _class_annotations; | |
207 // Annotation objects (byte arrays) for fields, or null if no annotations. | |
208 // Indices correspond to entries (not indices) in fields array. | |
209 objArrayOop _fields_annotations; | |
210 // Annotation objects (byte arrays) for methods, or null if no annotations. | |
211 // Index is the idnum, which is initially the same as the methods array index. | |
212 objArrayOop _methods_annotations; | |
213 // Annotation objects (byte arrays) for methods' parameters, or null if no | |
214 // such annotations. | |
215 // Index is the idnum, which is initially the same as the methods array index. | |
216 objArrayOop _methods_parameter_annotations; | |
217 // Annotation objects (byte arrays) for methods' default values, or null if no | |
218 // such annotations. | |
219 // Index is the idnum, which is initially the same as the methods array index. | |
220 objArrayOop _methods_default_annotations; | |
221 | |
222 // | |
223 // End of the oop block. | |
224 // | |
225 | |
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226 // Name of source file containing this klass, NULL if not specified. |
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227 Symbol* _source_file_name; |
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228 // the source debug extension for this klass, NULL if not specified. |
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229 Symbol* _source_debug_extension; |
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230 // Generic signature, or null if none. |
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231 Symbol* _generic_signature; |
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232 // Array name derived from this class which needs unreferencing |
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233 // if this class is unloaded. |
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234 Symbol* _array_name; |
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235 |
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236 // Number of heapOopSize words used by non-static fields in this klass |
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237 // (including inherited fields but after header_size()). |
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238 int _nonstatic_field_size; |
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239 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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240 u2 _static_oop_field_count;// number of static oop fields in this klass |
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241 u2 _java_fields_count; // The number of declared Java fields |
938 | 242 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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243 |
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244 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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245 enum { |
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246 _misc_rewritten = 1 << 0, // methods rewritten. |
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247 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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248 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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249 _misc_is_anonymous = 1 << 3 // has embedded _inner_classes field |
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250 }; |
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251 u2 _misc_flags; |
0 | 252 u2 _minor_version; // minor version number of class file |
253 u2 _major_version; // major version number of class file | |
254 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
255 int _vtable_len; // length of Java vtable (in words) | |
256 int _itable_len; // length of Java itable (in words) | |
257 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
258 JNIid* _jni_ids; // First JNI identifier for static fields in this class | |
259 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
260 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
261 nmethodBucket* _dependencies; // list of dependent nmethods | |
262 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
263 BreakpointInfo* _breakpoints; // bpt lists, managed by methodOop | |
264 // Array of interesting part(s) of the previous version(s) of this | |
265 // instanceKlass. See PreviousVersionWalker below. | |
266 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
267 // JVMTI fields can be moved to their own structure - see 6315920 | |
268 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
269 jint _cached_class_file_len; // JVMTI: length of above | |
270 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration | |
271 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change | |
272 | |
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273 // Class states are defined as ClassState (see above). |
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274 // Place the _init_state here to utilize the unused 2-byte after |
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275 // _idnum_allocated_count. |
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276 u1 _init_state; // state of class |
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277 |
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278 u1 _reference_type; // reference type |
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279 |
0 | 280 // embedded Java vtable follows here |
281 // embedded Java itables follows here | |
282 // embedded static fields follows here | |
283 // embedded nonstatic oop-map blocks follows here | |
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284 // embedded implementor of this interface follows here |
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285 // The embedded implementor only exists if the current klass is an |
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286 // iterface. The possible values of the implementor fall into following |
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287 // three cases: |
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288 // NULL: no implementor. |
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289 // A klassOop that's not itself: one implementor. |
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290 // Itsef: more than one implementors. |
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291 // embedded host klass follows here |
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292 // The embedded host klass only exists in an anonymous class for |
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293 // dynamic language support (JSR 292 enabled). The host class grants |
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294 // its access privileges to this class also. The host class is either |
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295 // named, or a previously loaded anonymous class. A non-anonymous class |
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296 // or an anonymous class loaded through normal classloading does not |
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297 // have this embedded field. |
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298 // |
0 | 299 |
300 friend class instanceKlassKlass; | |
301 friend class SystemDictionary; | |
302 | |
303 public: | |
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304 bool has_nonstatic_fields() const { |
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305 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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306 } |
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307 void set_has_nonstatic_fields(bool b) { |
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308 if (b) { |
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309 _misc_flags |= _misc_has_nonstatic_fields; |
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310 } else { |
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311 _misc_flags &= ~_misc_has_nonstatic_fields; |
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312 } |
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313 } |
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314 |
0 | 315 // field sizes |
316 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
317 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
318 | |
319 int static_field_size() const { return _static_field_size; } | |
320 void set_static_field_size(int size) { _static_field_size = size; } | |
321 | |
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322 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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323 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 324 |
325 // Java vtable | |
326 int vtable_length() const { return _vtable_len; } | |
327 void set_vtable_length(int len) { _vtable_len = len; } | |
328 | |
329 // Java itable | |
330 int itable_length() const { return _itable_len; } | |
331 void set_itable_length(int len) { _itable_len = len; } | |
332 | |
333 // array klasses | |
334 klassOop array_klasses() const { return _array_klasses; } | |
335 void set_array_klasses(klassOop k) { oop_store_without_check((oop*) &_array_klasses, (oop) k); } | |
336 | |
337 // methods | |
338 objArrayOop methods() const { return _methods; } | |
339 void set_methods(objArrayOop a) { oop_store_without_check((oop*) &_methods, (oop) a); } | |
340 methodOop method_with_idnum(int idnum); | |
341 | |
342 // method ordering | |
343 typeArrayOop method_ordering() const { return _method_ordering; } | |
344 void set_method_ordering(typeArrayOop m) { oop_store_without_check((oop*) &_method_ordering, (oop) m); } | |
345 | |
346 // interfaces | |
347 objArrayOop local_interfaces() const { return _local_interfaces; } | |
348 void set_local_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_local_interfaces, (oop) a); } | |
349 objArrayOop transitive_interfaces() const { return _transitive_interfaces; } | |
350 void set_transitive_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_transitive_interfaces, (oop) a); } | |
351 | |
3938 | 352 private: |
353 friend class fieldDescriptor; | |
354 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
355 | |
356 public: | |
357 int field_offset (int index) const { return field(index)->offset(); } | |
358 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
359 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
360 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
361 | |
362 // Number of Java declared fields | |
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363 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 364 |
0 | 365 typeArrayOop fields() const { return _fields; } |
3938 | 366 |
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367 void set_fields(typeArrayOop f, u2 java_fields_count) { |
3938 | 368 oop_store_without_check((oop*) &_fields, (oop) f); |
369 _java_fields_count = java_fields_count; | |
0 | 370 } |
371 | |
372 // inner classes | |
373 typeArrayOop inner_classes() const { return _inner_classes; } | |
374 void set_inner_classes(typeArrayOop f) { oop_store_without_check((oop*) &_inner_classes, (oop) f); } | |
375 | |
376 enum InnerClassAttributeOffset { | |
377 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
378 inner_class_inner_class_info_offset = 0, | |
379 inner_class_outer_class_info_offset = 1, | |
380 inner_class_inner_name_offset = 2, | |
381 inner_class_access_flags_offset = 3, | |
382 inner_class_next_offset = 4 | |
383 }; | |
384 | |
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385 enum EnclosingMethodAttributeOffset { |
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386 enclosing_method_class_index_offset = 0, |
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387 enclosing_method_method_index_offset = 1, |
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388 enclosing_method_attribute_size = 2 |
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389 }; |
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390 |
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391 // method override check |
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392 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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393 |
0 | 394 // package |
395 bool is_same_class_package(klassOop class2); | |
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396 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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397 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 398 |
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399 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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400 klassOop compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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401 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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402 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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403 } |
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404 static klassOop compute_enclosing_class_impl(instanceKlassHandle self, |
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405 bool* inner_is_member, TRAPS); |
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406 |
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407 // tell if two classes have the same enclosing class (at package level) |
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408 bool is_same_package_member(klassOop class2, TRAPS) { |
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409 instanceKlassHandle self(THREAD, this->as_klassOop()); |
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410 return is_same_package_member_impl(self, class2, THREAD); |
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411 } |
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412 static bool is_same_package_member_impl(instanceKlassHandle self, |
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413 klassOop class2, TRAPS); |
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414 |
0 | 415 // initialization state |
416 bool is_loaded() const { return _init_state >= loaded; } | |
417 bool is_linked() const { return _init_state >= linked; } | |
418 bool is_initialized() const { return _init_state == fully_initialized; } | |
419 bool is_not_initialized() const { return _init_state < being_initialized; } | |
420 bool is_being_initialized() const { return _init_state == being_initialized; } | |
421 bool is_in_error_state() const { return _init_state == initialization_error; } | |
422 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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423 ClassState init_state() { return (ClassState)_init_state; } |
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424 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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425 |
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426 // defineClass specified verification |
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427 bool should_verify_class() const { |
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428 return (_misc_flags & _misc_should_verify_class) != 0; |
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429 } |
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430 void set_should_verify_class(bool value) { |
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431 if (value) { |
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432 _misc_flags |= _misc_should_verify_class; |
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433 } else { |
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434 _misc_flags &= ~_misc_should_verify_class; |
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435 } |
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436 } |
0 | 437 |
438 // marking | |
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439 bool is_marked_dependent() const { return _is_marked_dependent; } |
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440 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 441 |
442 // initialization (virtuals from Klass) | |
443 bool should_be_initialized() const; // means that initialize should be called | |
444 void initialize(TRAPS); | |
445 void link_class(TRAPS); | |
446 bool link_class_or_fail(TRAPS); // returns false on failure | |
447 void unlink_class(); | |
448 void rewrite_class(TRAPS); | |
3748 | 449 void relocate_and_link_methods(TRAPS); |
0 | 450 methodOop class_initializer(); |
451 | |
452 // set the class to initialized if no static initializer is present | |
453 void eager_initialize(Thread *thread); | |
454 | |
455 // reference type | |
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456 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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457 void set_reference_type(ReferenceType t) { |
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458 assert(t == (u1)t, "overflow"); |
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459 _reference_type = (u1)t; |
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460 } |
0 | 461 |
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462 static ByteSize reference_type_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _reference_type)); } |
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463 |
0 | 464 // find local field, returns true if found |
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465 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 466 // find field in direct superinterfaces, returns the interface in which the field is defined |
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467 klassOop find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 468 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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469 klassOop find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 470 // 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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471 klassOop find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 472 |
473 // find a non-static or static field given its offset within the class. | |
474 bool contains_field_offset(int offset) { | |
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475 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 476 } |
477 | |
478 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
479 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
480 | |
481 // find a local method (returns NULL if not found) | |
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482 methodOop find_method(Symbol* name, Symbol* signature) const; |
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483 static methodOop find_method(objArrayOop methods, Symbol* name, Symbol* signature); |
0 | 484 |
485 // lookup operation (returns NULL if not found) | |
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486 methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 487 |
488 // lookup a method in all the interfaces that this class implements | |
489 // (returns NULL if not found) | |
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490 methodOop lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
0 | 491 |
492 // constant pool | |
493 constantPoolOop constants() const { return _constants; } | |
494 void set_constants(constantPoolOop c) { oop_store_without_check((oop*) &_constants, (oop) c); } | |
495 | |
496 // class loader | |
497 oop class_loader() const { return _class_loader; } | |
498 void set_class_loader(oop l) { oop_store((oop*) &_class_loader, l); } | |
499 | |
500 // protection domain | |
501 oop protection_domain() { return _protection_domain; } | |
502 void set_protection_domain(oop pd) { oop_store((oop*) &_protection_domain, pd); } | |
503 | |
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504 // host class |
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505 oop host_klass() const { |
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506 oop* hk = adr_host_klass(); |
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507 if (hk == NULL) { |
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508 return NULL; |
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509 } else { |
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510 return *hk; |
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511 } |
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512 } |
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513 void set_host_klass(oop host) { |
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514 assert(is_anonymous(), "not anonymous"); |
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515 oop* addr = adr_host_klass(); |
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516 assert(addr != NULL, "no reversed space"); |
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517 oop_store(addr, host); |
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518 } |
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519 bool is_anonymous() const { |
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520 return (_misc_flags & _misc_is_anonymous) != 0; |
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521 } |
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522 void set_is_anonymous(bool value) { |
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523 if (value) { |
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524 _misc_flags |= _misc_is_anonymous; |
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525 } else { |
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526 _misc_flags &= ~_misc_is_anonymous; |
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527 } |
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528 } |
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529 |
0 | 530 // signers |
531 objArrayOop signers() const { return _signers; } | |
532 void set_signers(objArrayOop s) { oop_store((oop*) &_signers, oop(s)); } | |
533 | |
534 // source file name | |
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535 Symbol* source_file_name() const { return _source_file_name; } |
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536 void set_source_file_name(Symbol* n); |
0 | 537 |
538 // minor and major version numbers of class file | |
539 u2 minor_version() const { return _minor_version; } | |
540 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
541 u2 major_version() const { return _major_version; } | |
542 void set_major_version(u2 major_version) { _major_version = major_version; } | |
543 | |
544 // source debug extension | |
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545 Symbol* source_debug_extension() const { return _source_debug_extension; } |
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546 void set_source_debug_extension(Symbol* n); |
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547 |
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548 // symbol unloading support (refcount already added) |
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549 Symbol* array_name() { return _array_name; } |
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550 void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; } |
0 | 551 |
552 // nonstatic oop-map blocks | |
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553 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
938 | 554 return oop_map_count * OopMapBlock::size_in_words(); |
555 } | |
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556 unsigned int nonstatic_oop_map_count() const { |
938 | 557 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
558 } | |
559 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
560 void set_nonstatic_oop_map_size(int words) { | |
561 _nonstatic_oop_map_size = words; | |
562 } | |
0 | 563 |
564 // RedefineClasses() support for previous versions: | |
565 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
566 int emcp_method_count); | |
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567 // If the _previous_versions array is non-NULL, then this klass |
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568 // has been redefined at least once even if we aren't currently |
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569 // tracking a previous version. |
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570 bool has_been_redefined() const { return _previous_versions != NULL; } |
0 | 571 bool has_previous_version() const; |
572 void init_previous_versions() { | |
573 _previous_versions = NULL; | |
574 } | |
575 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
576 return _previous_versions; | |
577 } | |
578 | |
579 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation | |
580 void set_cached_class_file(unsigned char *class_file_bytes, | |
581 jint class_file_len) { _cached_class_file_len = class_file_len; | |
582 _cached_class_file_bytes = class_file_bytes; } | |
583 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
584 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
585 | |
586 // JVMTI: Support for caching of field indices, types, and offsets | |
587 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
588 _jvmti_cached_class_field_map = descriptor; | |
589 } | |
590 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
591 return _jvmti_cached_class_field_map; | |
592 } | |
593 | |
594 // for adding methods, constMethodOopDesc::UNSET_IDNUM means no more ids available | |
595 inline u2 next_method_idnum(); | |
596 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
597 | |
598 // generics support | |
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599 Symbol* generic_signature() const { return _generic_signature; } |
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600 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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601 |
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602 u2 enclosing_method_data(int offset); |
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603 u2 enclosing_method_class_index() { |
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604 return enclosing_method_data(enclosing_method_class_index_offset); |
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605 } |
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606 u2 enclosing_method_method_index() { |
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607 return enclosing_method_data(enclosing_method_method_index_offset); |
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608 } |
0 | 609 void set_enclosing_method_indices(u2 class_index, |
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610 u2 method_index); |
0 | 611 |
612 // jmethodID support | |
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613 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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614 methodHandle method_h); |
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615 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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616 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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617 jmethodID* to_dealloc_id_p, |
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618 jmethodID** to_dealloc_jmeths_p); |
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619 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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620 size_t *length_p, jmethodID* id_p); |
0 | 621 jmethodID jmethod_id_or_null(methodOop method); |
622 | |
623 // cached itable index support | |
624 void set_cached_itable_index(size_t idnum, int index); | |
625 int cached_itable_index(size_t idnum); | |
626 | |
627 // annotations support | |
628 typeArrayOop class_annotations() const { return _class_annotations; } | |
629 objArrayOop fields_annotations() const { return _fields_annotations; } | |
630 objArrayOop methods_annotations() const { return _methods_annotations; } | |
631 objArrayOop methods_parameter_annotations() const { return _methods_parameter_annotations; } | |
632 objArrayOop methods_default_annotations() const { return _methods_default_annotations; } | |
633 void set_class_annotations(typeArrayOop md) { oop_store_without_check((oop*)&_class_annotations, (oop)md); } | |
634 void set_fields_annotations(objArrayOop md) { set_annotations(md, &_fields_annotations); } | |
635 void set_methods_annotations(objArrayOop md) { set_annotations(md, &_methods_annotations); } | |
636 void set_methods_parameter_annotations(objArrayOop md) { set_annotations(md, &_methods_parameter_annotations); } | |
637 void set_methods_default_annotations(objArrayOop md) { set_annotations(md, &_methods_default_annotations); } | |
638 typeArrayOop get_method_annotations_of(int idnum) | |
639 { return get_method_annotations_from(idnum, _methods_annotations); } | |
640 typeArrayOop get_method_parameter_annotations_of(int idnum) | |
641 { return get_method_annotations_from(idnum, _methods_parameter_annotations); } | |
642 typeArrayOop get_method_default_annotations_of(int idnum) | |
643 { return get_method_annotations_from(idnum, _methods_default_annotations); } | |
644 void set_method_annotations_of(int idnum, typeArrayOop anno) | |
645 { set_methods_annotations_of(idnum, anno, &_methods_annotations); } | |
646 void set_method_parameter_annotations_of(int idnum, typeArrayOop anno) | |
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647 { set_methods_annotations_of(idnum, anno, &_methods_parameter_annotations); } |
0 | 648 void set_method_default_annotations_of(int idnum, typeArrayOop anno) |
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649 { set_methods_annotations_of(idnum, anno, &_methods_default_annotations); } |
0 | 650 |
651 // allocation | |
652 DEFINE_ALLOCATE_PERMANENT(instanceKlass); | |
653 instanceOop allocate_instance(TRAPS); | |
654 instanceOop allocate_permanent_instance(TRAPS); | |
655 | |
656 // additional member function to return a handle | |
657 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
658 | |
659 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
660 // Helper function | |
661 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
662 | |
663 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
664 // if not, throw either an Error or an Exception. | |
665 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
666 | |
667 // initialization | |
668 void call_class_initializer(TRAPS); | |
669 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
670 | |
671 // OopMapCache support | |
672 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
673 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
674 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
675 | |
676 // JNI identifier support (for static fields - for jni performance) | |
677 JNIid* jni_ids() { return _jni_ids; } | |
678 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
679 JNIid* jni_id_for(int offset); | |
680 | |
681 // maintenance of deoptimization dependencies | |
682 int mark_dependent_nmethods(DepChange& changes); | |
683 void add_dependent_nmethod(nmethod* nm); | |
684 void remove_dependent_nmethod(nmethod* nm); | |
685 | |
686 // On-stack replacement support | |
687 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
688 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
689 void add_osr_nmethod(nmethod* n); | |
690 void remove_osr_nmethod(nmethod* n); | |
1783 | 691 nmethod* lookup_osr_nmethod(const methodOop m, int bci, int level, bool match_level) const; |
0 | 692 |
693 // Breakpoint support (see methods on methodOop for details) | |
694 BreakpointInfo* breakpoints() const { return _breakpoints; }; | |
695 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
696 | |
697 // support for stub routines | |
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698 static ByteSize init_state_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_state)); } |
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699 TRACE_DEFINE_OFFSET; |
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700 static ByteSize init_thread_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_thread)); } |
0 | 701 |
702 // subclass/subinterface checks | |
703 bool implements_interface(klassOop k) const; | |
704 | |
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705 // Access to the implementor of an interface. |
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706 klassOop implementor() const |
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707 { |
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708 klassOop* k = (klassOop*)adr_implementor(); |
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709 if (k == NULL) { |
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710 return NULL; |
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711 } else { |
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712 return *k; |
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713 } |
0 | 714 } |
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715 |
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716 void set_implementor(klassOop k) { |
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717 assert(is_interface(), "not interface"); |
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718 oop* addr = adr_implementor(); |
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719 oop_store_without_check(addr, k); |
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720 } |
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721 |
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722 int nof_implementors() const { |
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723 klassOop k = implementor(); |
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724 if (k == NULL) { |
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725 return 0; |
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726 } else if (k != this->as_klassOop()) { |
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727 return 1; |
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728 } else { |
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729 return 2; |
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730 } |
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731 } |
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732 |
0 | 733 void add_implementor(klassOop k); // k is a new class that implements this interface |
734 void init_implementor(); // initialize | |
735 | |
736 // link this class into the implementors list of every interface it implements | |
737 void process_interfaces(Thread *thread); | |
738 | |
739 // virtual operations from Klass | |
740 bool is_leaf_class() const { return _subklass == NULL; } | |
741 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); | |
742 bool compute_is_subtype_of(klassOop k); | |
743 bool can_be_primary_super_slow() const; | |
744 klassOop java_super() const { return super(); } | |
745 int oop_size(oop obj) const { return size_helper(); } | |
746 int klass_oop_size() const { return object_size(); } | |
747 bool oop_is_instance_slow() const { return true; } | |
748 | |
749 // Iterators | |
750 void do_local_static_fields(FieldClosure* cl); | |
751 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
752 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
753 | |
754 void methods_do(void f(methodOop method)); | |
755 void array_klasses_do(void f(klassOop k)); | |
756 void with_array_klasses_do(void f(klassOop k)); | |
757 bool super_types_do(SuperTypeClosure* blk); | |
758 | |
759 // Casting from klassOop | |
760 static instanceKlass* cast(klassOop k) { | |
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761 assert(k->is_klass(), "must be"); |
0 | 762 Klass* kp = k->klass_part(); |
763 assert(kp->null_vtbl() || kp->oop_is_instance_slow(), "cast to instanceKlass"); | |
764 return (instanceKlass*) kp; | |
765 } | |
766 | |
767 // Sizing (in words) | |
768 static int header_size() { return align_object_offset(oopDesc::header_size() + sizeof(instanceKlass)/HeapWordSize); } | |
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769 |
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770 int object_size() const |
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771 { |
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772 return object_size(align_object_offset(vtable_length()) + |
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773 align_object_offset(itable_length()) + |
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774 ((is_interface() || is_anonymous()) ? |
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775 align_object_offset(nonstatic_oop_map_size()) : |
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776 nonstatic_oop_map_size()) + |
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777 (is_interface() ? (int)sizeof(klassOop)/HeapWordSize : 0) + |
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778 (is_anonymous() ? (int)sizeof(klassOop)/HeapWordSize : 0)); |
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779 } |
0 | 780 static int vtable_start_offset() { return header_size(); } |
781 static int vtable_length_offset() { return oopDesc::header_size() + offset_of(instanceKlass, _vtable_len) / HeapWordSize; } | |
782 static int object_size(int extra) { return align_object_size(header_size() + extra); } | |
783 | |
784 intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); } | |
785 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } | |
786 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); } | |
787 | |
788 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
789 | |
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790 address static_field_addr(int offset); |
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791 |
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792 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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793 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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794 } |
0 | 795 |
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796 oop* adr_implementor() const { |
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797 if (is_interface()) { |
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798 return (oop*)(start_of_nonstatic_oop_maps() + |
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799 nonstatic_oop_map_count()); |
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800 } else { |
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801 return NULL; |
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802 } |
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803 }; |
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804 |
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805 oop* adr_host_klass() const { |
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806 if (is_anonymous()) { |
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807 oop* adr_impl = adr_implementor(); |
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808 if (adr_impl != NULL) { |
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809 return adr_impl + 1; |
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810 } else { |
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811 return (oop*)(start_of_nonstatic_oop_maps() + |
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812 nonstatic_oop_map_count()); |
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813 } |
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814 } else { |
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815 return NULL; |
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816 } |
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817 } |
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818 |
0 | 819 // Allocation profiling support |
820 juint alloc_size() const { return _alloc_count * size_helper(); } | |
821 void set_alloc_size(juint n) {} | |
822 | |
823 // Use this to return the size of an instance in heap words: | |
824 int size_helper() const { | |
825 return layout_helper_to_size_helper(layout_helper()); | |
826 } | |
827 | |
828 // This bit is initialized in classFileParser.cpp. | |
829 // It is false under any of the following conditions: | |
830 // - the class is abstract (including any interface) | |
831 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
832 // - the class size is larger than FastAllocateSizeLimit | |
833 // - the class is java/lang/Class, which cannot be allocated directly | |
834 bool can_be_fastpath_allocated() const { | |
835 return !layout_helper_needs_slow_path(layout_helper()); | |
836 } | |
837 | |
838 // Java vtable/itable | |
839 klassVtable* vtable() const; // return new klassVtable wrapper | |
840 inline methodOop method_at_vtable(int index); | |
841 klassItable* itable() const; // return new klassItable wrapper | |
842 methodOop method_at_itable(klassOop holder, int index, TRAPS); | |
843 | |
844 // Garbage collection | |
845 void oop_follow_contents(oop obj); | |
846 int oop_adjust_pointers(oop obj); | |
847 bool object_is_parsable() const { return _init_state != unparsable_by_gc; } | |
848 // Value of _init_state must be zero (unparsable_by_gc) when klass field is set. | |
849 | |
850 void follow_weak_klass_links( | |
851 BoolObjectClosure* is_alive, OopClosure* keep_alive); | |
852 void release_C_heap_structures(); | |
853 | |
854 // Parallel Scavenge and Parallel Old | |
855 PARALLEL_GC_DECLS | |
856 | |
857 // Naming | |
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858 const char* signature_name() const; |
0 | 859 |
860 // Iterators | |
861 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
862 return oop_oop_iterate_v(obj, blk); | |
863 } | |
864 | |
865 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
866 return oop_oop_iterate_v_m(obj, blk, mr); | |
867 } | |
868 | |
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869 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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870 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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871 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 872 MemRegion mr); |
873 | |
874 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
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875 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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876 |
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877 #ifndef SERIALGC |
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878 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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879 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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880 |
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881 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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882 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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883 #endif // !SERIALGC |
0 | 884 |
885 private: | |
886 // initialization state | |
887 #ifdef ASSERT | |
888 void set_init_state(ClassState state); | |
889 #else | |
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890 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 891 #endif |
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892 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
0 | 893 void set_init_thread(Thread *thread) { _init_thread = thread; } |
894 | |
895 u2 idnum_allocated_count() const { return _idnum_allocated_count; } | |
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896 // The RedefineClasses() API can cause new method idnums to be needed |
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897 // which will cause the caches to grow. Safety requires different |
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898 // cache management logic if the caches can grow instead of just |
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899 // going from NULL to non-NULL. |
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900 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 901 jmethodID* methods_jmethod_ids_acquire() const |
902 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
903 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
904 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
905 | |
906 int* methods_cached_itable_indices_acquire() const | |
907 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
908 void release_set_methods_cached_itable_indices(int* indices) | |
909 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
910 | |
911 inline typeArrayOop get_method_annotations_from(int idnum, objArrayOop annos); | |
912 void set_annotations(objArrayOop md, objArrayOop* md_p) { oop_store_without_check((oop*)md_p, (oop)md); } | |
913 void set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p); | |
914 | |
915 // Offsets for memory management | |
916 oop* adr_array_klasses() const { return (oop*)&this->_array_klasses;} | |
917 oop* adr_methods() const { return (oop*)&this->_methods;} | |
918 oop* adr_method_ordering() const { return (oop*)&this->_method_ordering;} | |
919 oop* adr_local_interfaces() const { return (oop*)&this->_local_interfaces;} | |
920 oop* adr_transitive_interfaces() const { return (oop*)&this->_transitive_interfaces;} | |
921 oop* adr_fields() const { return (oop*)&this->_fields;} | |
922 oop* adr_constants() const { return (oop*)&this->_constants;} | |
923 oop* adr_class_loader() const { return (oop*)&this->_class_loader;} | |
924 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
925 oop* adr_signers() const { return (oop*)&this->_signers;} | |
926 oop* adr_inner_classes() const { return (oop*)&this->_inner_classes;} | |
927 oop* adr_methods_jmethod_ids() const { return (oop*)&this->_methods_jmethod_ids;} | |
928 oop* adr_methods_cached_itable_indices() const { return (oop*)&this->_methods_cached_itable_indices;} | |
929 oop* adr_class_annotations() const { return (oop*)&this->_class_annotations;} | |
930 oop* adr_fields_annotations() const { return (oop*)&this->_fields_annotations;} | |
931 oop* adr_methods_annotations() const { return (oop*)&this->_methods_annotations;} | |
932 oop* adr_methods_parameter_annotations() const { return (oop*)&this->_methods_parameter_annotations;} | |
933 oop* adr_methods_default_annotations() const { return (oop*)&this->_methods_default_annotations;} | |
934 | |
935 // Static methods that are used to implement member methods where an exposed this pointer | |
936 // is needed due to possible GCs | |
937 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
938 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
939 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
940 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
941 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
942 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
943 static klassOop array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); | |
944 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); | |
945 /* jni_id_for_impl for jfieldID only */ | |
946 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
947 | |
948 // Returns the array class for the n'th dimension | |
949 klassOop array_klass_impl(bool or_null, int n, TRAPS); | |
950 | |
951 // Returns the array class with this class as element type | |
952 klassOop array_klass_impl(bool or_null, TRAPS); | |
953 | |
954 public: | |
955 // sharing support | |
956 virtual void remove_unshareable_info(); | |
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957 virtual void shared_symbols_iterate(SymbolClosure* closure); |
0 | 958 |
959 // jvm support | |
960 jint compute_modifier_flags(TRAPS) const; | |
961 | |
962 public: | |
963 // JVMTI support | |
964 jint jvmti_class_status() const; | |
965 | |
966 public: | |
967 // Printing | |
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968 void oop_print_value_on(oop obj, outputStream* st); |
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969 #ifndef PRODUCT |
0 | 970 void oop_print_on (oop obj, outputStream* st); |
971 | |
972 void print_dependent_nmethods(bool verbose = false); | |
973 bool is_dependent_nmethod(nmethod* nm); | |
974 #endif | |
975 | |
976 // Verification | |
977 const char* internal_name() const; | |
978 void oop_verify_on(oop obj, outputStream* st); | |
979 }; | |
980 | |
981 inline methodOop instanceKlass::method_at_vtable(int index) { | |
982 #ifndef PRODUCT | |
983 assert(index >= 0, "valid vtable index"); | |
984 if (DebugVtables) { | |
985 verify_vtable_index(index); | |
986 } | |
987 #endif | |
988 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
989 return ve[index].method(); | |
990 } | |
991 | |
992 inline typeArrayOop instanceKlass::get_method_annotations_from(int idnum, objArrayOop annos) { | |
993 if (annos == NULL || annos->length() <= idnum) { | |
994 return NULL; | |
995 } | |
996 return typeArrayOop(annos->obj_at(idnum)); | |
997 } | |
998 | |
999 // for adding methods | |
1000 // UNSET_IDNUM return means no more ids available | |
1001 inline u2 instanceKlass::next_method_idnum() { | |
1002 if (_idnum_allocated_count == constMethodOopDesc::MAX_IDNUM) { | |
1003 return constMethodOopDesc::UNSET_IDNUM; // no more ids available | |
1004 } else { | |
1005 return _idnum_allocated_count++; | |
1006 } | |
1007 } | |
1008 | |
1009 | |
1010 /* JNIid class for jfieldIDs only */ | |
6197 | 1011 class JNIid: public CHeapObj<mtClass> { |
0 | 1012 friend class VMStructs; |
1013 private: | |
1014 klassOop _holder; | |
1015 JNIid* _next; | |
1016 int _offset; | |
1017 #ifdef ASSERT | |
1018 bool _is_static_field_id; | |
1019 #endif | |
1020 | |
1021 public: | |
1022 // Accessors | |
1023 klassOop holder() const { return _holder; } | |
1024 int offset() const { return _offset; } | |
1025 JNIid* next() { return _next; } | |
1026 // Constructor | |
1027 JNIid(klassOop holder, int offset, JNIid* next); | |
1028 // Identifier lookup | |
1029 JNIid* find(int offset); | |
1030 | |
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1031 bool find_local_field(fieldDescriptor* fd) { |
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1032 return instanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1033 } |
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1034 |
0 | 1035 // Garbage collection support |
1036 oop* holder_addr() { return (oop*)&_holder; } | |
1037 void oops_do(OopClosure* f); | |
1038 static void deallocate(JNIid* id); | |
1039 // Debugging | |
1040 #ifdef ASSERT | |
1041 bool is_static_field_id() const { return _is_static_field_id; } | |
1042 void set_is_static_field_id() { _is_static_field_id = true; } | |
1043 #endif | |
1044 void verify(klassOop holder); | |
1045 }; | |
1046 | |
1047 | |
1048 // If breakpoints are more numerous than just JVMTI breakpoints, | |
1049 // consider compressing this data structure. | |
1050 // It is currently a simple linked list defined in methodOop.hpp. | |
1051 | |
1052 class BreakpointInfo; | |
1053 | |
1054 | |
1055 // A collection point for interesting information about the previous | |
1056 // version(s) of an instanceKlass. This class uses weak references to | |
1057 // the information so that the information may be collected as needed | |
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1058 // by the system. If the information is shared, then a regular |
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1059 // reference must be used because a weak reference would be seen as |
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1060 // collectible. A GrowableArray of PreviousVersionNodes is attached |
0 | 1061 // to the instanceKlass as needed. See PreviousVersionWalker below. |
6197 | 1062 class PreviousVersionNode : public CHeapObj<mtClass> { |
0 | 1063 private: |
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1064 // A shared ConstantPool is never collected so we'll always have |
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1065 // a reference to it so we can update items in the cache. We'll |
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1066 // have a weak reference to a non-shared ConstantPool until all |
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1067 // of the methods (EMCP or obsolete) have been collected; the |
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1068 // non-shared ConstantPool becomes collectible at that point. |
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1069 jobject _prev_constant_pool; // regular or weak reference |
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1070 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1071 |
0 | 1072 // If the previous version of the instanceKlass doesn't have any |
1073 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the | |
1074 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1075 // have a length of zero. | |
1076 GrowableArray<jweak>* _prev_EMCP_methods; | |
1077 | |
1078 public: | |
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1079 PreviousVersionNode(jobject prev_constant_pool, bool prev_cp_is_weak, |
0 | 1080 GrowableArray<jweak>* prev_EMCP_methods); |
1081 ~PreviousVersionNode(); | |
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1082 jobject prev_constant_pool() const { |
0 | 1083 return _prev_constant_pool; |
1084 } | |
1085 GrowableArray<jweak>* prev_EMCP_methods() const { | |
1086 return _prev_EMCP_methods; | |
1087 } | |
1088 }; | |
1089 | |
1090 | |
1091 // A Handle-ized version of PreviousVersionNode. | |
1092 class PreviousVersionInfo : public ResourceObj { | |
1093 private: | |
1094 constantPoolHandle _prev_constant_pool_handle; | |
1095 // If the previous version of the instanceKlass doesn't have any | |
1096 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the | |
1097 // methods cannot be collected while we hold a handle, | |
1098 // _prev_EMCP_methods should never have a length of zero. | |
1099 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
1100 | |
1101 public: | |
1102 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
1103 ~PreviousVersionInfo(); | |
1104 constantPoolHandle prev_constant_pool_handle() const { | |
1105 return _prev_constant_pool_handle; | |
1106 } | |
1107 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
1108 return _prev_EMCP_method_handles; | |
1109 } | |
1110 }; | |
1111 | |
1112 | |
1113 // Helper object for walking previous versions. This helper cleans up | |
1114 // the Handles that it allocates when the helper object is destroyed. | |
1115 // The PreviousVersionInfo object returned by next_previous_version() | |
1116 // is only valid until a subsequent call to next_previous_version() or | |
1117 // the helper object is destroyed. | |
1118 class PreviousVersionWalker : public StackObj { | |
1119 private: | |
1120 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
1121 int _current_index; | |
1122 // Fields for cleaning up when we are done walking the previous versions: | |
1123 // A HandleMark for the PreviousVersionInfo handles: | |
1124 HandleMark _hm; | |
1125 | |
1126 // It would be nice to have a ResourceMark field in this helper also, | |
1127 // but the ResourceMark code says to be careful to delete handles held | |
1128 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
1129 // can't guarantee the order in which the fields are destroyed, we | |
1130 // have to let the creator of the PreviousVersionWalker object do | |
1131 // the right thing. Also, adding a ResourceMark here causes an | |
1132 // include loop. | |
1133 | |
1134 // A pointer to the current info object so we can handle the deletes. | |
1135 PreviousVersionInfo * _current_p; | |
1136 | |
1137 public: | |
1138 PreviousVersionWalker(instanceKlass *ik); | |
1139 ~PreviousVersionWalker(); | |
1140 | |
1141 // Return the interesting information for the next previous version | |
1142 // of the klass. Returns NULL if there are no more previous versions. | |
1143 PreviousVersionInfo* next_previous_version(); | |
1144 }; | |
1972 | 1145 |
3939 | 1146 |
1147 // | |
1148 // nmethodBucket is used to record dependent nmethods for | |
1149 // deoptimization. nmethod dependencies are actually <klass, method> | |
1150 // pairs but we really only care about the klass part for purposes of | |
1151 // finding nmethods which might need to be deoptimized. Instead of | |
1152 // recording the method, a count of how many times a particular nmethod | |
1153 // was recorded is kept. This ensures that any recording errors are | |
1154 // noticed since an nmethod should be removed as many times are it's | |
1155 // added. | |
1156 // | |
6197 | 1157 class nmethodBucket: public CHeapObj<mtClass> { |
3939 | 1158 friend class VMStructs; |
1159 private: | |
1160 nmethod* _nmethod; | |
1161 int _count; | |
1162 nmethodBucket* _next; | |
1163 | |
1164 public: | |
1165 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1166 _nmethod = nmethod; | |
1167 _next = next; | |
1168 _count = 1; | |
1169 } | |
1170 int count() { return _count; } | |
1171 int increment() { _count += 1; return _count; } | |
1172 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1173 nmethodBucket* next() { return _next; } | |
1174 void set_next(nmethodBucket* b) { _next = b; } | |
1175 nmethod* get_nmethod() { return _nmethod; } | |
1176 }; | |
1177 | |
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1178 // An iterator that's used to access the inner classes indices in the |
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1179 // instanceKlass::_inner_classes array. |
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1180 class InnerClassesIterator : public StackObj { |
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1181 private: |
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1182 typeArrayHandle _inner_classes; |
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1183 int _length; |
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1184 int _idx; |
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1185 public: |
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1186 |
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1187 InnerClassesIterator(instanceKlassHandle k) { |
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1188 _inner_classes = k->inner_classes(); |
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1189 if (k->inner_classes() != NULL) { |
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1190 _length = _inner_classes->length(); |
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1191 // The inner class array's length should be the multiple of |
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1192 // inner_class_next_offset if it only contains the InnerClasses |
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1193 // attribute data, or it should be |
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1194 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1195 // if it also contains the EnclosingMethod data. |
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1196 assert((_length % instanceKlass::inner_class_next_offset == 0 || |
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1197 _length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size), |
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1198 "just checking"); |
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1199 // Remove the enclosing_method portion if exists. |
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1200 if (_length % instanceKlass::inner_class_next_offset == instanceKlass::enclosing_method_attribute_size) { |
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1201 _length -= instanceKlass::enclosing_method_attribute_size; |
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1202 } |
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1203 } else { |
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1204 _length = 0; |
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1205 } |
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1206 _idx = 0; |
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1207 } |
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1208 |
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1209 int length() const { |
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1210 return _length; |
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1211 } |
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1212 |
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1213 void next() { |
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1214 _idx += instanceKlass::inner_class_next_offset; |
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1215 } |
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1216 |
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1217 bool done() const { |
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1218 return (_idx >= _length); |
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1219 } |
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1220 |
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1221 u2 inner_class_info_index() const { |
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1222 return _inner_classes->ushort_at( |
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1223 _idx + instanceKlass::inner_class_inner_class_info_offset); |
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1224 } |
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1225 |
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1226 void set_inner_class_info_index(u2 index) { |
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1227 _inner_classes->ushort_at_put( |
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1228 _idx + instanceKlass::inner_class_inner_class_info_offset, index); |
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1229 } |
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1230 |
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1231 u2 outer_class_info_index() const { |
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1232 return _inner_classes->ushort_at( |
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1233 _idx + instanceKlass::inner_class_outer_class_info_offset); |
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1234 } |
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1235 |
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1236 void set_outer_class_info_index(u2 index) { |
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1237 _inner_classes->ushort_at_put( |
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1238 _idx + instanceKlass::inner_class_outer_class_info_offset, index); |
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1239 } |
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1240 |
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1241 u2 inner_name_index() const { |
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1242 return _inner_classes->ushort_at( |
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1243 _idx + instanceKlass::inner_class_inner_name_offset); |
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1244 } |
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1245 |
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1246 void set_inner_name_index(u2 index) { |
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1247 _inner_classes->ushort_at_put( |
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1248 _idx + instanceKlass::inner_class_inner_name_offset, index); |
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1249 } |
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1250 |
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1251 u2 inner_access_flags() const { |
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1252 return _inner_classes->ushort_at( |
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1253 _idx + instanceKlass::inner_class_access_flags_offset); |
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1254 } |
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1255 }; |
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1256 |
1972 | 1257 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |