Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/instanceKlass.hpp @ 342:37f87013dfd8
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author | ysr |
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date | Thu, 05 Jun 2008 15:57:56 -0700 |
parents | ba764ed4b6f2 |
children | 6aae2f9d0294 |
rev | line source |
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0 | 1 /* |
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // An instanceKlass is the VM level representation of a Java class. | |
26 // It contains all information needed for at class at execution runtime. | |
27 | |
28 // instanceKlass layout: | |
29 // [header ] klassOop | |
30 // [klass pointer ] klassOop | |
31 // [C++ vtbl pointer ] Klass | |
32 // [subtype cache ] Klass | |
33 // [instance size ] Klass | |
34 // [java mirror ] Klass | |
35 // [super ] Klass | |
36 // [access_flags ] Klass | |
37 // [name ] Klass | |
38 // [first subklass ] Klass | |
39 // [next sibling ] Klass | |
40 // [array klasses ] | |
41 // [methods ] | |
42 // [local interfaces ] | |
43 // [transitive interfaces ] | |
44 // [number of implementors ] | |
45 // [implementors ] klassOop[2] | |
46 // [fields ] | |
47 // [constants ] | |
48 // [class loader ] | |
49 // [protection domain ] | |
50 // [signers ] | |
51 // [source file name ] | |
52 // [inner classes ] | |
53 // [static field size ] | |
54 // [nonstatic field size ] | |
55 // [static oop fields size ] | |
56 // [nonstatic oop maps size ] | |
57 // [has finalize method ] | |
58 // [deoptimization mark bit ] | |
59 // [initialization state ] | |
60 // [initializing thread ] | |
61 // [Java vtable length ] | |
62 // [oop map cache (stack maps) ] | |
63 // [EMBEDDED Java vtable ] size in words = vtable_len | |
64 // [EMBEDDED static oop fields ] size in words = static_oop_fields_size | |
65 // [ static non-oop fields ] size in words = static_field_size - static_oop_fields_size | |
66 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size | |
67 // | |
68 // The embedded nonstatic oop-map blocks are short pairs (offset, length) indicating | |
69 // where oops are located in instances of this klass. | |
70 | |
71 | |
72 // forward declaration for class -- see below for definition | |
73 class SuperTypeClosure; | |
74 class OopMapBlock; | |
75 class JNIid; | |
76 class jniIdMapBase; | |
77 class BreakpointInfo; | |
78 class fieldDescriptor; | |
79 class DepChange; | |
80 class nmethodBucket; | |
81 class PreviousVersionNode; | |
82 class JvmtiCachedClassFieldMap; | |
83 | |
84 // This is used in iterators below. | |
85 class FieldClosure: public StackObj { | |
86 public: | |
87 virtual void do_field(fieldDescriptor* fd) = 0; | |
88 }; | |
89 | |
90 #ifndef PRODUCT | |
91 // Print fields. | |
92 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. | |
93 class FieldPrinter: public FieldClosure { | |
94 oop _obj; | |
95 outputStream* _st; | |
96 public: | |
97 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} | |
98 void do_field(fieldDescriptor* fd); | |
99 }; | |
100 #endif // !PRODUCT | |
101 | |
102 class instanceKlass: public Klass { | |
103 friend class VMStructs; | |
104 public: | |
105 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description | |
106 // of the class loading & initialization procedure, and the use of the states. | |
107 enum ClassState { | |
108 unparsable_by_gc = 0, // object is not yet parsable by gc. Value of _init_state at object allocation. | |
109 allocated, // allocated (but not yet linked) | |
110 loaded, // loaded and inserted in class hierarchy (but not linked yet) | |
111 linked, // successfully linked/verified (but not initialized yet) | |
112 being_initialized, // currently running class initializer | |
113 fully_initialized, // initialized (successfull final state) | |
114 initialization_error // error happened during initialization | |
115 }; | |
116 | |
117 public: | |
118 oop* oop_block_beg() const { return adr_array_klasses(); } | |
119 oop* oop_block_end() const { return adr_methods_default_annotations() + 1; } | |
120 | |
121 enum { | |
122 implementors_limit = 2 // how many implems can we track? | |
123 }; | |
124 | |
125 protected: | |
126 // | |
127 // The oop block. See comment in klass.hpp before making changes. | |
128 // | |
129 | |
130 // Array classes holding elements of this class. | |
131 klassOop _array_klasses; | |
132 // Method array. | |
133 objArrayOop _methods; | |
134 // Int array containing the original order of method in the class file (for | |
135 // JVMTI). | |
136 typeArrayOop _method_ordering; | |
137 // Interface (klassOops) this class declares locally to implement. | |
138 objArrayOop _local_interfaces; | |
139 // Interface (klassOops) this class implements transitively. | |
140 objArrayOop _transitive_interfaces; | |
141 // Instance and static variable information, 5-tuples of shorts [access, name | |
142 // index, sig index, initval index, offset]. | |
143 typeArrayOop _fields; | |
144 // Constant pool for this class. | |
145 constantPoolOop _constants; | |
146 // Class loader used to load this class, NULL if VM loader used. | |
147 oop _class_loader; | |
148 // Protection domain. | |
149 oop _protection_domain; | |
150 // Class signers. | |
151 objArrayOop _signers; | |
152 // Name of source file containing this klass, NULL if not specified. | |
153 symbolOop _source_file_name; | |
154 // the source debug extension for this klass, NULL if not specified. | |
155 symbolOop _source_debug_extension; | |
156 // inner_classes attribute. | |
157 typeArrayOop _inner_classes; | |
158 // Implementors of this interface (not valid if it overflows) | |
159 klassOop _implementors[implementors_limit]; | |
160 // Generic signature, or null if none. | |
161 symbolOop _generic_signature; | |
162 // Annotations for this class, or null if none. | |
163 typeArrayOop _class_annotations; | |
164 // Annotation objects (byte arrays) for fields, or null if no annotations. | |
165 // Indices correspond to entries (not indices) in fields array. | |
166 objArrayOop _fields_annotations; | |
167 // Annotation objects (byte arrays) for methods, or null if no annotations. | |
168 // Index is the idnum, which is initially the same as the methods array index. | |
169 objArrayOop _methods_annotations; | |
170 // Annotation objects (byte arrays) for methods' parameters, or null if no | |
171 // such annotations. | |
172 // Index is the idnum, which is initially the same as the methods array index. | |
173 objArrayOop _methods_parameter_annotations; | |
174 // Annotation objects (byte arrays) for methods' default values, or null if no | |
175 // such annotations. | |
176 // Index is the idnum, which is initially the same as the methods array index. | |
177 objArrayOop _methods_default_annotations; | |
178 | |
179 // | |
180 // End of the oop block. | |
181 // | |
182 | |
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183 // number of words used by non-static fields in this klass (including |
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184 // inherited fields but after header_size()). If fields are compressed into |
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185 // header, this can be zero so it's not the same as number of static fields. |
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186 int _nonstatic_field_size; |
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187 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
0 | 188 int _static_oop_field_size;// number of static oop fields in this klass |
189 int _nonstatic_oop_map_size;// number of nonstatic oop-map blocks allocated at end of this klass | |
190 bool _is_marked_dependent; // used for marking during flushing and deoptimization | |
191 bool _rewritten; // methods rewritten. | |
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192 bool _has_nonstatic_fields; // for sizing with UseCompressedOops |
0 | 193 u2 _minor_version; // minor version number of class file |
194 u2 _major_version; // major version number of class file | |
195 ClassState _init_state; // state of class | |
196 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
197 int _vtable_len; // length of Java vtable (in words) | |
198 int _itable_len; // length of Java itable (in words) | |
199 ReferenceType _reference_type; // reference type | |
200 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
201 JNIid* _jni_ids; // First JNI identifier for static fields in this class | |
202 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
203 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
204 nmethodBucket* _dependencies; // list of dependent nmethods | |
205 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
206 BreakpointInfo* _breakpoints; // bpt lists, managed by methodOop | |
207 int _nof_implementors; // No of implementors of this interface (zero if not an interface) | |
208 // Array of interesting part(s) of the previous version(s) of this | |
209 // instanceKlass. See PreviousVersionWalker below. | |
210 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
211 u2 _enclosing_method_class_index; // Constant pool index for class of enclosing method, or 0 if none | |
212 u2 _enclosing_method_method_index; // Constant pool index for name and type of enclosing method, or 0 if none | |
213 // JVMTI fields can be moved to their own structure - see 6315920 | |
214 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
215 jint _cached_class_file_len; // JVMTI: length of above | |
216 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration | |
217 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change | |
218 | |
219 // embedded Java vtable follows here | |
220 // embedded Java itables follows here | |
221 // embedded static fields follows here | |
222 // embedded nonstatic oop-map blocks follows here | |
223 | |
224 friend class instanceKlassKlass; | |
225 friend class SystemDictionary; | |
226 | |
227 public: | |
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228 bool has_nonstatic_fields() const { return _has_nonstatic_fields; } |
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229 void set_has_nonstatic_fields(bool b) { _has_nonstatic_fields = b; } |
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230 |
0 | 231 // field sizes |
232 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
233 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
234 | |
235 int static_field_size() const { return _static_field_size; } | |
236 void set_static_field_size(int size) { _static_field_size = size; } | |
237 | |
238 int static_oop_field_size() const { return _static_oop_field_size; } | |
239 void set_static_oop_field_size(int size) { _static_oop_field_size = size; } | |
240 | |
241 // Java vtable | |
242 int vtable_length() const { return _vtable_len; } | |
243 void set_vtable_length(int len) { _vtable_len = len; } | |
244 | |
245 // Java itable | |
246 int itable_length() const { return _itable_len; } | |
247 void set_itable_length(int len) { _itable_len = len; } | |
248 | |
249 // array klasses | |
250 klassOop array_klasses() const { return _array_klasses; } | |
251 void set_array_klasses(klassOop k) { oop_store_without_check((oop*) &_array_klasses, (oop) k); } | |
252 | |
253 // methods | |
254 objArrayOop methods() const { return _methods; } | |
255 void set_methods(objArrayOop a) { oop_store_without_check((oop*) &_methods, (oop) a); } | |
256 methodOop method_with_idnum(int idnum); | |
257 | |
258 // method ordering | |
259 typeArrayOop method_ordering() const { return _method_ordering; } | |
260 void set_method_ordering(typeArrayOop m) { oop_store_without_check((oop*) &_method_ordering, (oop) m); } | |
261 | |
262 // interfaces | |
263 objArrayOop local_interfaces() const { return _local_interfaces; } | |
264 void set_local_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_local_interfaces, (oop) a); } | |
265 objArrayOop transitive_interfaces() const { return _transitive_interfaces; } | |
266 void set_transitive_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_transitive_interfaces, (oop) a); } | |
267 | |
268 // fields | |
269 // Field info extracted from the class file and stored | |
270 // as an array of 7 shorts | |
271 enum FieldOffset { | |
272 access_flags_offset = 0, | |
273 name_index_offset = 1, | |
274 signature_index_offset = 2, | |
275 initval_index_offset = 3, | |
276 low_offset = 4, | |
277 high_offset = 5, | |
278 generic_signature_offset = 6, | |
279 next_offset = 7 | |
280 }; | |
281 | |
282 typeArrayOop fields() const { return _fields; } | |
283 int offset_from_fields( int index ) const { | |
284 return build_int_from_shorts( fields()->ushort_at(index + low_offset), | |
285 fields()->ushort_at(index + high_offset) ); | |
286 } | |
287 | |
288 void set_fields(typeArrayOop f) { oop_store_without_check((oop*) &_fields, (oop) f); } | |
289 | |
290 // inner classes | |
291 typeArrayOop inner_classes() const { return _inner_classes; } | |
292 void set_inner_classes(typeArrayOop f) { oop_store_without_check((oop*) &_inner_classes, (oop) f); } | |
293 | |
294 enum InnerClassAttributeOffset { | |
295 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
296 inner_class_inner_class_info_offset = 0, | |
297 inner_class_outer_class_info_offset = 1, | |
298 inner_class_inner_name_offset = 2, | |
299 inner_class_access_flags_offset = 3, | |
300 inner_class_next_offset = 4 | |
301 }; | |
302 | |
303 // package | |
304 bool is_same_class_package(klassOop class2); | |
305 bool is_same_class_package(oop classloader2, symbolOop classname2); | |
306 static bool is_same_class_package(oop class_loader1, symbolOop class_name1, oop class_loader2, symbolOop class_name2); | |
307 | |
308 // initialization state | |
309 bool is_loaded() const { return _init_state >= loaded; } | |
310 bool is_linked() const { return _init_state >= linked; } | |
311 bool is_initialized() const { return _init_state == fully_initialized; } | |
312 bool is_not_initialized() const { return _init_state < being_initialized; } | |
313 bool is_being_initialized() const { return _init_state == being_initialized; } | |
314 bool is_in_error_state() const { return _init_state == initialization_error; } | |
315 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
316 int get_init_state() { return _init_state; } // Useful for debugging | |
317 bool is_rewritten() const { return _rewritten; } | |
318 | |
319 // marking | |
320 bool is_marked_dependent() const { return _is_marked_dependent; } | |
321 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } | |
322 | |
323 // initialization (virtuals from Klass) | |
324 bool should_be_initialized() const; // means that initialize should be called | |
325 void initialize(TRAPS); | |
326 void link_class(TRAPS); | |
327 bool link_class_or_fail(TRAPS); // returns false on failure | |
328 void unlink_class(); | |
329 void rewrite_class(TRAPS); | |
330 methodOop class_initializer(); | |
331 | |
332 // set the class to initialized if no static initializer is present | |
333 void eager_initialize(Thread *thread); | |
334 | |
335 // reference type | |
336 ReferenceType reference_type() const { return _reference_type; } | |
337 void set_reference_type(ReferenceType t) { _reference_type = t; } | |
338 | |
339 // find local field, returns true if found | |
340 bool find_local_field(symbolOop name, symbolOop sig, fieldDescriptor* fd) const; | |
341 // find field in direct superinterfaces, returns the interface in which the field is defined | |
342 klassOop find_interface_field(symbolOop name, symbolOop sig, fieldDescriptor* fd) const; | |
343 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined | |
344 klassOop find_field(symbolOop name, symbolOop sig, fieldDescriptor* fd) const; | |
345 // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined | |
346 klassOop find_field(symbolOop name, symbolOop sig, bool is_static, fieldDescriptor* fd) const; | |
347 | |
348 // find a non-static or static field given its offset within the class. | |
349 bool contains_field_offset(int offset) { | |
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350 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 351 } |
352 | |
353 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
354 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
355 | |
356 // find a local method (returns NULL if not found) | |
357 methodOop find_method(symbolOop name, symbolOop signature) const; | |
358 static methodOop find_method(objArrayOop methods, symbolOop name, symbolOop signature); | |
359 | |
360 // lookup operation (returns NULL if not found) | |
361 methodOop uncached_lookup_method(symbolOop name, symbolOop signature) const; | |
362 | |
363 // lookup a method in all the interfaces that this class implements | |
364 // (returns NULL if not found) | |
365 methodOop lookup_method_in_all_interfaces(symbolOop name, symbolOop signature) const; | |
366 | |
367 // constant pool | |
368 constantPoolOop constants() const { return _constants; } | |
369 void set_constants(constantPoolOop c) { oop_store_without_check((oop*) &_constants, (oop) c); } | |
370 | |
371 // class loader | |
372 oop class_loader() const { return _class_loader; } | |
373 void set_class_loader(oop l) { oop_store((oop*) &_class_loader, l); } | |
374 | |
375 // protection domain | |
376 oop protection_domain() { return _protection_domain; } | |
377 void set_protection_domain(oop pd) { oop_store((oop*) &_protection_domain, pd); } | |
378 | |
379 // signers | |
380 objArrayOop signers() const { return _signers; } | |
381 void set_signers(objArrayOop s) { oop_store((oop*) &_signers, oop(s)); } | |
382 | |
383 // source file name | |
384 symbolOop source_file_name() const { return _source_file_name; } | |
385 void set_source_file_name(symbolOop n) { oop_store_without_check((oop*) &_source_file_name, (oop) n); } | |
386 | |
387 // minor and major version numbers of class file | |
388 u2 minor_version() const { return _minor_version; } | |
389 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
390 u2 major_version() const { return _major_version; } | |
391 void set_major_version(u2 major_version) { _major_version = major_version; } | |
392 | |
393 // source debug extension | |
394 symbolOop source_debug_extension() const { return _source_debug_extension; } | |
395 void set_source_debug_extension(symbolOop n){ oop_store_without_check((oop*) &_source_debug_extension, (oop) n); } | |
396 | |
397 // nonstatic oop-map blocks | |
398 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
399 void set_nonstatic_oop_map_size(int size) { _nonstatic_oop_map_size = size; } | |
400 | |
401 // RedefineClasses() support for previous versions: | |
402 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
403 int emcp_method_count); | |
404 bool has_previous_version() const; | |
405 void init_previous_versions() { | |
406 _previous_versions = NULL; | |
407 } | |
408 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
409 return _previous_versions; | |
410 } | |
411 | |
412 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation | |
413 void set_cached_class_file(unsigned char *class_file_bytes, | |
414 jint class_file_len) { _cached_class_file_len = class_file_len; | |
415 _cached_class_file_bytes = class_file_bytes; } | |
416 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
417 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
418 | |
419 // JVMTI: Support for caching of field indices, types, and offsets | |
420 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
421 _jvmti_cached_class_field_map = descriptor; | |
422 } | |
423 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
424 return _jvmti_cached_class_field_map; | |
425 } | |
426 | |
427 // for adding methods, constMethodOopDesc::UNSET_IDNUM means no more ids available | |
428 inline u2 next_method_idnum(); | |
429 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
430 | |
431 // generics support | |
432 symbolOop generic_signature() const { return _generic_signature; } | |
433 void set_generic_signature(symbolOop sig) { oop_store_without_check((oop*)&_generic_signature, (oop)sig); } | |
434 u2 enclosing_method_class_index() const { return _enclosing_method_class_index; } | |
435 u2 enclosing_method_method_index() const { return _enclosing_method_method_index; } | |
436 void set_enclosing_method_indices(u2 class_index, | |
437 u2 method_index) { _enclosing_method_class_index = class_index; | |
438 _enclosing_method_method_index = method_index; } | |
439 | |
440 // jmethodID support | |
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441 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, size_t idnum, |
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442 jmethodID new_id, jmethodID* new_jmeths); |
0 | 443 static jmethodID jmethod_id_for_impl(instanceKlassHandle ik_h, methodHandle method_h); |
444 jmethodID jmethod_id_or_null(methodOop method); | |
445 | |
446 // cached itable index support | |
447 void set_cached_itable_index(size_t idnum, int index); | |
448 int cached_itable_index(size_t idnum); | |
449 | |
450 // annotations support | |
451 typeArrayOop class_annotations() const { return _class_annotations; } | |
452 objArrayOop fields_annotations() const { return _fields_annotations; } | |
453 objArrayOop methods_annotations() const { return _methods_annotations; } | |
454 objArrayOop methods_parameter_annotations() const { return _methods_parameter_annotations; } | |
455 objArrayOop methods_default_annotations() const { return _methods_default_annotations; } | |
456 void set_class_annotations(typeArrayOop md) { oop_store_without_check((oop*)&_class_annotations, (oop)md); } | |
457 void set_fields_annotations(objArrayOop md) { set_annotations(md, &_fields_annotations); } | |
458 void set_methods_annotations(objArrayOop md) { set_annotations(md, &_methods_annotations); } | |
459 void set_methods_parameter_annotations(objArrayOop md) { set_annotations(md, &_methods_parameter_annotations); } | |
460 void set_methods_default_annotations(objArrayOop md) { set_annotations(md, &_methods_default_annotations); } | |
461 typeArrayOop get_method_annotations_of(int idnum) | |
462 { return get_method_annotations_from(idnum, _methods_annotations); } | |
463 typeArrayOop get_method_parameter_annotations_of(int idnum) | |
464 { return get_method_annotations_from(idnum, _methods_parameter_annotations); } | |
465 typeArrayOop get_method_default_annotations_of(int idnum) | |
466 { return get_method_annotations_from(idnum, _methods_default_annotations); } | |
467 void set_method_annotations_of(int idnum, typeArrayOop anno) | |
468 { set_methods_annotations_of(idnum, anno, &_methods_annotations); } | |
469 void set_method_parameter_annotations_of(int idnum, typeArrayOop anno) | |
470 { set_methods_annotations_of(idnum, anno, &_methods_annotations); } | |
471 void set_method_default_annotations_of(int idnum, typeArrayOop anno) | |
472 { set_methods_annotations_of(idnum, anno, &_methods_annotations); } | |
473 | |
474 // allocation | |
475 DEFINE_ALLOCATE_PERMANENT(instanceKlass); | |
476 instanceOop allocate_instance(TRAPS); | |
477 instanceOop allocate_permanent_instance(TRAPS); | |
478 | |
479 // additional member function to return a handle | |
480 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
481 | |
482 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
483 // Helper function | |
484 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
485 | |
486 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
487 // if not, throw either an Error or an Exception. | |
488 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
489 | |
490 // initialization | |
491 void call_class_initializer(TRAPS); | |
492 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
493 | |
494 // OopMapCache support | |
495 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
496 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
497 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
498 | |
499 // JNI identifier support (for static fields - for jni performance) | |
500 JNIid* jni_ids() { return _jni_ids; } | |
501 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
502 JNIid* jni_id_for(int offset); | |
503 | |
504 // maintenance of deoptimization dependencies | |
505 int mark_dependent_nmethods(DepChange& changes); | |
506 void add_dependent_nmethod(nmethod* nm); | |
507 void remove_dependent_nmethod(nmethod* nm); | |
508 | |
509 // On-stack replacement support | |
510 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
511 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
512 void add_osr_nmethod(nmethod* n); | |
513 void remove_osr_nmethod(nmethod* n); | |
514 nmethod* lookup_osr_nmethod(const methodOop m, int bci) const; | |
515 | |
516 // Breakpoint support (see methods on methodOop for details) | |
517 BreakpointInfo* breakpoints() const { return _breakpoints; }; | |
518 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
519 | |
520 // support for stub routines | |
521 static int init_state_offset_in_bytes() { return offset_of(instanceKlass, _init_state); } | |
522 static int init_thread_offset_in_bytes() { return offset_of(instanceKlass, _init_thread); } | |
523 | |
524 // subclass/subinterface checks | |
525 bool implements_interface(klassOop k) const; | |
526 | |
527 // Access to implementors of an interface. We only store the count | |
528 // of implementors, and in case, there are only a few | |
529 // implementors, we store them in a short list. | |
530 // This accessor returns NULL if we walk off the end of the list. | |
531 klassOop implementor(int i) const { | |
532 return (i < implementors_limit)? _implementors[i]: (klassOop) NULL; | |
533 } | |
534 int nof_implementors() const { return _nof_implementors; } | |
535 void add_implementor(klassOop k); // k is a new class that implements this interface | |
536 void init_implementor(); // initialize | |
537 | |
538 // link this class into the implementors list of every interface it implements | |
539 void process_interfaces(Thread *thread); | |
540 | |
541 // virtual operations from Klass | |
542 bool is_leaf_class() const { return _subklass == NULL; } | |
543 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); | |
544 bool compute_is_subtype_of(klassOop k); | |
545 bool can_be_primary_super_slow() const; | |
546 klassOop java_super() const { return super(); } | |
547 int oop_size(oop obj) const { return size_helper(); } | |
548 int klass_oop_size() const { return object_size(); } | |
549 bool oop_is_instance_slow() const { return true; } | |
550 | |
551 // Iterators | |
552 void do_local_static_fields(FieldClosure* cl); | |
553 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
554 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
555 | |
556 void methods_do(void f(methodOop method)); | |
557 void array_klasses_do(void f(klassOop k)); | |
558 void with_array_klasses_do(void f(klassOop k)); | |
559 bool super_types_do(SuperTypeClosure* blk); | |
560 | |
561 // Casting from klassOop | |
562 static instanceKlass* cast(klassOop k) { | |
563 Klass* kp = k->klass_part(); | |
564 assert(kp->null_vtbl() || kp->oop_is_instance_slow(), "cast to instanceKlass"); | |
565 return (instanceKlass*) kp; | |
566 } | |
567 | |
568 // Sizing (in words) | |
569 static int header_size() { return align_object_offset(oopDesc::header_size() + sizeof(instanceKlass)/HeapWordSize); } | |
570 int object_size() const { return object_size(align_object_offset(vtable_length()) + align_object_offset(itable_length()) + static_field_size() + nonstatic_oop_map_size()); } | |
571 static int vtable_start_offset() { return header_size(); } | |
572 static int vtable_length_offset() { return oopDesc::header_size() + offset_of(instanceKlass, _vtable_len) / HeapWordSize; } | |
573 static int object_size(int extra) { return align_object_size(header_size() + extra); } | |
574 | |
575 intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); } | |
576 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } | |
577 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); } | |
578 | |
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579 // Static field offset is an offset into the Heap, should be converted by |
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580 // based on UseCompressedOop for traversal |
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581 HeapWord* start_of_static_fields() const { |
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582 return (HeapWord*)(start_of_itable() + align_object_offset(itable_length())); |
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583 } |
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584 |
0 | 585 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } |
586 | |
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587 int offset_of_static_fields() const { |
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588 return (intptr_t)start_of_static_fields() - (intptr_t)as_klassOop(); |
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589 } |
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590 |
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591 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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592 return (OopMapBlock*) (start_of_static_fields() + static_field_size()); |
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593 } |
0 | 594 |
595 // Allocation profiling support | |
596 juint alloc_size() const { return _alloc_count * size_helper(); } | |
597 void set_alloc_size(juint n) {} | |
598 | |
599 // Use this to return the size of an instance in heap words: | |
600 int size_helper() const { | |
601 return layout_helper_to_size_helper(layout_helper()); | |
602 } | |
603 | |
604 // This bit is initialized in classFileParser.cpp. | |
605 // It is false under any of the following conditions: | |
606 // - the class is abstract (including any interface) | |
607 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
608 // - the class size is larger than FastAllocateSizeLimit | |
609 // - the class is java/lang/Class, which cannot be allocated directly | |
610 bool can_be_fastpath_allocated() const { | |
611 return !layout_helper_needs_slow_path(layout_helper()); | |
612 } | |
613 | |
614 // Java vtable/itable | |
615 klassVtable* vtable() const; // return new klassVtable wrapper | |
616 inline methodOop method_at_vtable(int index); | |
617 klassItable* itable() const; // return new klassItable wrapper | |
618 methodOop method_at_itable(klassOop holder, int index, TRAPS); | |
619 | |
620 // Garbage collection | |
621 void oop_follow_contents(oop obj); | |
622 void follow_static_fields(); | |
623 void adjust_static_fields(); | |
624 int oop_adjust_pointers(oop obj); | |
625 bool object_is_parsable() const { return _init_state != unparsable_by_gc; } | |
626 // Value of _init_state must be zero (unparsable_by_gc) when klass field is set. | |
627 | |
628 void follow_weak_klass_links( | |
629 BoolObjectClosure* is_alive, OopClosure* keep_alive); | |
630 void release_C_heap_structures(); | |
631 | |
632 // Parallel Scavenge and Parallel Old | |
633 PARALLEL_GC_DECLS | |
634 | |
635 #ifndef SERIALGC | |
636 // Parallel Scavenge | |
637 void copy_static_fields(PSPromotionManager* pm); | |
638 void push_static_fields(PSPromotionManager* pm); | |
639 | |
640 // Parallel Old | |
641 void follow_static_fields(ParCompactionManager* cm); | |
642 void copy_static_fields(ParCompactionManager* cm); | |
643 void update_static_fields(); | |
644 void update_static_fields(HeapWord* beg_addr, HeapWord* end_addr); | |
645 #endif // SERIALGC | |
646 | |
647 // Naming | |
648 char* signature_name() const; | |
649 | |
650 // Iterators | |
651 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
652 return oop_oop_iterate_v(obj, blk); | |
653 } | |
654 | |
655 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
656 return oop_oop_iterate_v_m(obj, blk, mr); | |
657 } | |
658 | |
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659 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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660 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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661 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 662 MemRegion mr); |
663 | |
664 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
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665 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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666 |
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667 #ifndef SERIALGC |
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668 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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669 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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670 |
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671 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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672 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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673 #endif // !SERIALGC |
0 | 674 |
675 void iterate_static_fields(OopClosure* closure); | |
676 void iterate_static_fields(OopClosure* closure, MemRegion mr); | |
677 | |
678 private: | |
679 // initialization state | |
680 #ifdef ASSERT | |
681 void set_init_state(ClassState state); | |
682 #else | |
683 void set_init_state(ClassState state) { _init_state = state; } | |
684 #endif | |
685 void set_rewritten() { _rewritten = true; } | |
686 void set_init_thread(Thread *thread) { _init_thread = thread; } | |
687 | |
688 u2 idnum_allocated_count() const { return _idnum_allocated_count; } | |
689 jmethodID* methods_jmethod_ids_acquire() const | |
690 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
691 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
692 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
693 | |
694 int* methods_cached_itable_indices_acquire() const | |
695 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
696 void release_set_methods_cached_itable_indices(int* indices) | |
697 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
698 | |
699 inline typeArrayOop get_method_annotations_from(int idnum, objArrayOop annos); | |
700 void set_annotations(objArrayOop md, objArrayOop* md_p) { oop_store_without_check((oop*)md_p, (oop)md); } | |
701 void set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p); | |
702 | |
703 // Offsets for memory management | |
704 oop* adr_array_klasses() const { return (oop*)&this->_array_klasses;} | |
705 oop* adr_methods() const { return (oop*)&this->_methods;} | |
706 oop* adr_method_ordering() const { return (oop*)&this->_method_ordering;} | |
707 oop* adr_local_interfaces() const { return (oop*)&this->_local_interfaces;} | |
708 oop* adr_transitive_interfaces() const { return (oop*)&this->_transitive_interfaces;} | |
709 oop* adr_fields() const { return (oop*)&this->_fields;} | |
710 oop* adr_constants() const { return (oop*)&this->_constants;} | |
711 oop* adr_class_loader() const { return (oop*)&this->_class_loader;} | |
712 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
713 oop* adr_signers() const { return (oop*)&this->_signers;} | |
714 oop* adr_source_file_name() const { return (oop*)&this->_source_file_name;} | |
715 oop* adr_source_debug_extension() const { return (oop*)&this->_source_debug_extension;} | |
716 oop* adr_inner_classes() const { return (oop*)&this->_inner_classes;} | |
717 oop* adr_implementors() const { return (oop*)&this->_implementors[0];} | |
718 oop* adr_generic_signature() const { return (oop*)&this->_generic_signature;} | |
719 oop* adr_methods_jmethod_ids() const { return (oop*)&this->_methods_jmethod_ids;} | |
720 oop* adr_methods_cached_itable_indices() const { return (oop*)&this->_methods_cached_itable_indices;} | |
721 oop* adr_class_annotations() const { return (oop*)&this->_class_annotations;} | |
722 oop* adr_fields_annotations() const { return (oop*)&this->_fields_annotations;} | |
723 oop* adr_methods_annotations() const { return (oop*)&this->_methods_annotations;} | |
724 oop* adr_methods_parameter_annotations() const { return (oop*)&this->_methods_parameter_annotations;} | |
725 oop* adr_methods_default_annotations() const { return (oop*)&this->_methods_default_annotations;} | |
726 | |
727 // Static methods that are used to implement member methods where an exposed this pointer | |
728 // is needed due to possible GCs | |
729 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
730 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
731 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
732 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
733 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
734 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
735 static klassOop array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); | |
736 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); | |
737 /* jni_id_for_impl for jfieldID only */ | |
738 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
739 | |
740 // Returns the array class for the n'th dimension | |
741 klassOop array_klass_impl(bool or_null, int n, TRAPS); | |
742 | |
743 // Returns the array class with this class as element type | |
744 klassOop array_klass_impl(bool or_null, TRAPS); | |
745 | |
746 public: | |
747 // sharing support | |
748 virtual void remove_unshareable_info(); | |
749 void field_names_and_sigs_iterate(OopClosure* closure); | |
750 | |
751 // jvm support | |
752 jint compute_modifier_flags(TRAPS) const; | |
753 | |
754 public: | |
755 // JVMTI support | |
756 jint jvmti_class_status() const; | |
757 | |
758 #ifndef PRODUCT | |
759 public: | |
760 // Printing | |
761 void oop_print_on (oop obj, outputStream* st); | |
762 void oop_print_value_on(oop obj, outputStream* st); | |
763 | |
764 void print_dependent_nmethods(bool verbose = false); | |
765 bool is_dependent_nmethod(nmethod* nm); | |
766 #endif | |
767 | |
768 public: | |
769 // Verification | |
770 const char* internal_name() const; | |
771 void oop_verify_on(oop obj, outputStream* st); | |
772 | |
773 #ifndef PRODUCT | |
774 static void verify_class_klass_nonstatic_oop_maps(klassOop k) PRODUCT_RETURN; | |
775 #endif | |
776 }; | |
777 | |
778 inline methodOop instanceKlass::method_at_vtable(int index) { | |
779 #ifndef PRODUCT | |
780 assert(index >= 0, "valid vtable index"); | |
781 if (DebugVtables) { | |
782 verify_vtable_index(index); | |
783 } | |
784 #endif | |
785 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
786 return ve[index].method(); | |
787 } | |
788 | |
789 inline typeArrayOop instanceKlass::get_method_annotations_from(int idnum, objArrayOop annos) { | |
790 if (annos == NULL || annos->length() <= idnum) { | |
791 return NULL; | |
792 } | |
793 return typeArrayOop(annos->obj_at(idnum)); | |
794 } | |
795 | |
796 // for adding methods | |
797 // UNSET_IDNUM return means no more ids available | |
798 inline u2 instanceKlass::next_method_idnum() { | |
799 if (_idnum_allocated_count == constMethodOopDesc::MAX_IDNUM) { | |
800 return constMethodOopDesc::UNSET_IDNUM; // no more ids available | |
801 } else { | |
802 return _idnum_allocated_count++; | |
803 } | |
804 } | |
805 | |
806 | |
807 // ValueObjs embedded in klass. Describes where oops are located in instances of this klass. | |
808 | |
809 class OopMapBlock VALUE_OBJ_CLASS_SPEC { | |
810 private: | |
811 jushort _offset; // Offset of first oop in oop-map block | |
812 jushort _length; // Length of oop-map block | |
813 public: | |
814 // Accessors | |
815 jushort offset() const { return _offset; } | |
816 void set_offset(jushort offset) { _offset = offset; } | |
817 | |
818 jushort length() const { return _length; } | |
819 void set_length(jushort length) { _length = length; } | |
820 }; | |
821 | |
822 /* JNIid class for jfieldIDs only */ | |
823 class JNIid: public CHeapObj { | |
824 friend class VMStructs; | |
825 private: | |
826 klassOop _holder; | |
827 JNIid* _next; | |
828 int _offset; | |
829 #ifdef ASSERT | |
830 bool _is_static_field_id; | |
831 #endif | |
832 | |
833 public: | |
834 // Accessors | |
835 klassOop holder() const { return _holder; } | |
836 int offset() const { return _offset; } | |
837 JNIid* next() { return _next; } | |
838 // Constructor | |
839 JNIid(klassOop holder, int offset, JNIid* next); | |
840 // Identifier lookup | |
841 JNIid* find(int offset); | |
842 | |
843 // Garbage collection support | |
844 oop* holder_addr() { return (oop*)&_holder; } | |
845 void oops_do(OopClosure* f); | |
846 static void deallocate(JNIid* id); | |
847 // Debugging | |
848 #ifdef ASSERT | |
849 bool is_static_field_id() const { return _is_static_field_id; } | |
850 void set_is_static_field_id() { _is_static_field_id = true; } | |
851 #endif | |
852 void verify(klassOop holder); | |
853 }; | |
854 | |
855 | |
856 // If breakpoints are more numerous than just JVMTI breakpoints, | |
857 // consider compressing this data structure. | |
858 // It is currently a simple linked list defined in methodOop.hpp. | |
859 | |
860 class BreakpointInfo; | |
861 | |
862 | |
863 // A collection point for interesting information about the previous | |
864 // version(s) of an instanceKlass. This class uses weak references to | |
865 // the information so that the information may be collected as needed | |
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866 // by the system. If the information is shared, then a regular |
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867 // reference must be used because a weak reference would be seen as |
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868 // collectible. A GrowableArray of PreviousVersionNodes is attached |
0 | 869 // to the instanceKlass as needed. See PreviousVersionWalker below. |
870 class PreviousVersionNode : public CHeapObj { | |
871 private: | |
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872 // A shared ConstantPool is never collected so we'll always have |
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873 // a reference to it so we can update items in the cache. We'll |
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874 // have a weak reference to a non-shared ConstantPool until all |
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875 // of the methods (EMCP or obsolete) have been collected; the |
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876 // non-shared ConstantPool becomes collectible at that point. |
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877 jobject _prev_constant_pool; // regular or weak reference |
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878 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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879 |
0 | 880 // If the previous version of the instanceKlass doesn't have any |
881 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the | |
882 // EMCP methods have been collected, then _prev_EMCP_methods can | |
883 // have a length of zero. | |
884 GrowableArray<jweak>* _prev_EMCP_methods; | |
885 | |
886 public: | |
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887 PreviousVersionNode(jobject prev_constant_pool, bool prev_cp_is_weak, |
0 | 888 GrowableArray<jweak>* prev_EMCP_methods); |
889 ~PreviousVersionNode(); | |
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890 jobject prev_constant_pool() const { |
0 | 891 return _prev_constant_pool; |
892 } | |
893 GrowableArray<jweak>* prev_EMCP_methods() const { | |
894 return _prev_EMCP_methods; | |
895 } | |
896 }; | |
897 | |
898 | |
899 // A Handle-ized version of PreviousVersionNode. | |
900 class PreviousVersionInfo : public ResourceObj { | |
901 private: | |
902 constantPoolHandle _prev_constant_pool_handle; | |
903 // If the previous version of the instanceKlass doesn't have any | |
904 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the | |
905 // methods cannot be collected while we hold a handle, | |
906 // _prev_EMCP_methods should never have a length of zero. | |
907 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
908 | |
909 public: | |
910 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
911 ~PreviousVersionInfo(); | |
912 constantPoolHandle prev_constant_pool_handle() const { | |
913 return _prev_constant_pool_handle; | |
914 } | |
915 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
916 return _prev_EMCP_method_handles; | |
917 } | |
918 }; | |
919 | |
920 | |
921 // Helper object for walking previous versions. This helper cleans up | |
922 // the Handles that it allocates when the helper object is destroyed. | |
923 // The PreviousVersionInfo object returned by next_previous_version() | |
924 // is only valid until a subsequent call to next_previous_version() or | |
925 // the helper object is destroyed. | |
926 class PreviousVersionWalker : public StackObj { | |
927 private: | |
928 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
929 int _current_index; | |
930 // Fields for cleaning up when we are done walking the previous versions: | |
931 // A HandleMark for the PreviousVersionInfo handles: | |
932 HandleMark _hm; | |
933 | |
934 // It would be nice to have a ResourceMark field in this helper also, | |
935 // but the ResourceMark code says to be careful to delete handles held | |
936 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
937 // can't guarantee the order in which the fields are destroyed, we | |
938 // have to let the creator of the PreviousVersionWalker object do | |
939 // the right thing. Also, adding a ResourceMark here causes an | |
940 // include loop. | |
941 | |
942 // A pointer to the current info object so we can handle the deletes. | |
943 PreviousVersionInfo * _current_p; | |
944 | |
945 public: | |
946 PreviousVersionWalker(instanceKlass *ik); | |
947 ~PreviousVersionWalker(); | |
948 | |
949 // Return the interesting information for the next previous version | |
950 // of the klass. Returns NULL if there are no more previous versions. | |
951 PreviousVersionInfo* next_previous_version(); | |
952 }; |