1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "gc_implementation/shared/markSweep.inline.hpp"
29 #include "gc_interface/collectedHeap.inline.hpp"
30 #include "interpreter/oopMapCache.hpp"
31 #include "memory/gcLocker.hpp"
32 #include "oops/constantPoolOop.hpp"
33 #include "oops/instanceKlass.hpp"
34 #include "oops/instanceMirrorKlass.hpp"
35 #include "oops/instanceKlassKlass.hpp"
36 #include "oops/instanceRefKlass.hpp"
37 #include "oops/objArrayKlassKlass.hpp"
38 #include "oops/objArrayOop.hpp"
39 #include "oops/oop.inline.hpp"
40 #include "oops/oop.inline2.hpp"
41 #include "oops/symbol.hpp"
42 #include "oops/typeArrayOop.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "runtime/fieldDescriptor.hpp"
45 #ifndef SERIALGC
46 #include "gc_implementation/parNew/parOopClosures.inline.hpp"
47 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
48 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
49 #include "memory/cardTableRS.hpp"
50 #include "oops/oop.pcgc.inline.hpp"
51 #endif
52
53 klassOop instanceKlassKlass::create_klass(TRAPS) {
54 instanceKlassKlass o;
55 KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());
56 KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL);
57 // Make sure size calculation is right
58 assert(k()->size() == align_object_size(header_size()), "wrong size for object");
59 java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror
60 return k();
61 }
62
63 int instanceKlassKlass::oop_size(oop obj) const {
64 assert(obj->is_klass(), "must be klass");
65 return instanceKlass::cast(klassOop(obj))->object_size();
66 }
67
68 bool instanceKlassKlass::oop_is_parsable(oop obj) const {
69 assert(obj->is_klass(), "must be klass");
70 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
71 return (!ik->null_vtbl()) && ik->object_is_parsable();
72 }
73
74 void instanceKlassKlass::iterate_c_heap_oops(instanceKlass* ik,
75 OopClosure* closure) {
76 if (ik->oop_map_cache() != NULL) {
77 ik->oop_map_cache()->oop_iterate(closure);
78 }
79
80 if (ik->jni_ids() != NULL) {
81 ik->jni_ids()->oops_do(closure);
82 }
83 }
84
85 void instanceKlassKlass::oop_follow_contents(oop obj) {
86 assert(obj->is_klass(),"must be a klass");
87 assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
88
89 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
90 {
91 HandleMark hm;
92 ik->vtable()->oop_follow_contents();
93 ik->itable()->oop_follow_contents();
94 }
95
96 MarkSweep::mark_and_push(ik->adr_array_klasses());
97 MarkSweep::mark_and_push(ik->adr_methods());
98 MarkSweep::mark_and_push(ik->adr_method_ordering());
99 MarkSweep::mark_and_push(ik->adr_local_interfaces());
100 MarkSweep::mark_and_push(ik->adr_transitive_interfaces());
101 MarkSweep::mark_and_push(ik->adr_fields());
102 MarkSweep::mark_and_push(ik->adr_constants());
103 MarkSweep::mark_and_push(ik->adr_class_loader());
104 MarkSweep::mark_and_push(ik->adr_inner_classes());
105 MarkSweep::mark_and_push(ik->adr_protection_domain());
106 MarkSweep::mark_and_push(ik->adr_host_klass());
107 MarkSweep::mark_and_push(ik->adr_signers());
108 MarkSweep::mark_and_push(ik->adr_class_annotations());
109 MarkSweep::mark_and_push(ik->adr_fields_annotations());
110 MarkSweep::mark_and_push(ik->adr_methods_annotations());
111 MarkSweep::mark_and_push(ik->adr_methods_parameter_annotations());
112 MarkSweep::mark_and_push(ik->adr_methods_default_annotations());
113
114 // We do not follow adr_implementors() here. It is followed later
115 // in instanceKlass::follow_weak_klass_links()
116
117 klassKlass::oop_follow_contents(obj);
118
119 iterate_c_heap_oops(ik, &MarkSweep::mark_and_push_closure);
120 }
121
122 #ifndef SERIALGC
123 void instanceKlassKlass::oop_follow_contents(ParCompactionManager* cm,
124 oop obj) {
125 assert(obj->is_klass(),"must be a klass");
126 assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
127
128 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
129 ik->vtable()->oop_follow_contents(cm);
130 ik->itable()->oop_follow_contents(cm);
131
132 PSParallelCompact::mark_and_push(cm, ik->adr_array_klasses());
133 PSParallelCompact::mark_and_push(cm, ik->adr_methods());
134 PSParallelCompact::mark_and_push(cm, ik->adr_method_ordering());
135 PSParallelCompact::mark_and_push(cm, ik->adr_local_interfaces());
136 PSParallelCompact::mark_and_push(cm, ik->adr_transitive_interfaces());
137 PSParallelCompact::mark_and_push(cm, ik->adr_fields());
138 PSParallelCompact::mark_and_push(cm, ik->adr_constants());
139 PSParallelCompact::mark_and_push(cm, ik->adr_class_loader());
140 PSParallelCompact::mark_and_push(cm, ik->adr_inner_classes());
141 PSParallelCompact::mark_and_push(cm, ik->adr_protection_domain());
142 PSParallelCompact::mark_and_push(cm, ik->adr_host_klass());
143 PSParallelCompact::mark_and_push(cm, ik->adr_signers());
144 PSParallelCompact::mark_and_push(cm, ik->adr_class_annotations());
145 PSParallelCompact::mark_and_push(cm, ik->adr_fields_annotations());
146 PSParallelCompact::mark_and_push(cm, ik->adr_methods_annotations());
147 PSParallelCompact::mark_and_push(cm, ik->adr_methods_parameter_annotations());
148 PSParallelCompact::mark_and_push(cm, ik->adr_methods_default_annotations());
149
150 // We do not follow adr_implementor() here. It is followed later
151 // in instanceKlass::follow_weak_klass_links()
152
153 klassKlass::oop_follow_contents(cm, obj);
154
155 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
156 iterate_c_heap_oops(ik, &mark_and_push_closure);
157 }
158 #endif // SERIALGC
159
160 int instanceKlassKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
161 assert(obj->is_klass(),"must be a klass");
162 assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
163 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
164 // Get size before changing pointers.
165 // Don't call size() or oop_size() since that is a virtual call.
166 int size = ik->object_size();
167
168 ik->vtable()->oop_oop_iterate(blk);
169 ik->itable()->oop_oop_iterate(blk);
170
171 blk->do_oop(ik->adr_array_klasses());
172 blk->do_oop(ik->adr_methods());
173 blk->do_oop(ik->adr_method_ordering());
174 blk->do_oop(ik->adr_local_interfaces());
175 blk->do_oop(ik->adr_transitive_interfaces());
176 blk->do_oop(ik->adr_fields());
177 blk->do_oop(ik->adr_constants());
178 blk->do_oop(ik->adr_class_loader());
179 blk->do_oop(ik->adr_protection_domain());
180 blk->do_oop(ik->adr_host_klass());
181 blk->do_oop(ik->adr_signers());
182 blk->do_oop(ik->adr_inner_classes());
183 for (int i = 0; i < instanceKlass::implementors_limit; i++) {
184 blk->do_oop(&ik->adr_implementors()[i]);
185 }
186 blk->do_oop(ik->adr_class_annotations());
187 blk->do_oop(ik->adr_fields_annotations());
188 blk->do_oop(ik->adr_methods_annotations());
189 blk->do_oop(ik->adr_methods_parameter_annotations());
190 blk->do_oop(ik->adr_methods_default_annotations());
191
192 klassKlass::oop_oop_iterate(obj, blk);
193
194 if(ik->oop_map_cache() != NULL) ik->oop_map_cache()->oop_iterate(blk);
195 return size;
196 }
197
198 int instanceKlassKlass::oop_oop_iterate_m(oop obj, OopClosure* blk,
199 MemRegion mr) {
200 assert(obj->is_klass(),"must be a klass");
201 assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
202 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
203 // Get size before changing pointers.
204 // Don't call size() or oop_size() since that is a virtual call.
205 int size = ik->object_size();
206
207 ik->vtable()->oop_oop_iterate_m(blk, mr);
208 ik->itable()->oop_oop_iterate_m(blk, mr);
209
210 oop* adr;
211 adr = ik->adr_array_klasses();
212 if (mr.contains(adr)) blk->do_oop(adr);
213 adr = ik->adr_methods();
214 if (mr.contains(adr)) blk->do_oop(adr);
215 adr = ik->adr_method_ordering();
216 if (mr.contains(adr)) blk->do_oop(adr);
217 adr = ik->adr_local_interfaces();
218 if (mr.contains(adr)) blk->do_oop(adr);
219 adr = ik->adr_transitive_interfaces();
220 if (mr.contains(adr)) blk->do_oop(adr);
221 adr = ik->adr_fields();
222 if (mr.contains(adr)) blk->do_oop(adr);
223 adr = ik->adr_constants();
224 if (mr.contains(adr)) blk->do_oop(adr);
225 adr = ik->adr_class_loader();
226 if (mr.contains(adr)) blk->do_oop(adr);
227 adr = ik->adr_protection_domain();
228 if (mr.contains(adr)) blk->do_oop(adr);
229 adr = ik->adr_host_klass();
230 if (mr.contains(adr)) blk->do_oop(adr);
231 adr = ik->adr_signers();
232 if (mr.contains(adr)) blk->do_oop(adr);
233 adr = ik->adr_inner_classes();
234 if (mr.contains(adr)) blk->do_oop(adr);
235 adr = ik->adr_implementors();
236 for (int i = 0; i < instanceKlass::implementors_limit; i++) {
237 if (mr.contains(&adr[i])) blk->do_oop(&adr[i]);
238 }
239 adr = ik->adr_class_annotations();
240 if (mr.contains(adr)) blk->do_oop(adr);
241 adr = ik->adr_fields_annotations();
242 if (mr.contains(adr)) blk->do_oop(adr);
243 adr = ik->adr_methods_annotations();
244 if (mr.contains(adr)) blk->do_oop(adr);
245 adr = ik->adr_methods_parameter_annotations();
246 if (mr.contains(adr)) blk->do_oop(adr);
247 adr = ik->adr_methods_default_annotations();
248 if (mr.contains(adr)) blk->do_oop(adr);
249
250 klassKlass::oop_oop_iterate_m(obj, blk, mr);
251
252 if(ik->oop_map_cache() != NULL) ik->oop_map_cache()->oop_iterate(blk, mr);
253 return size;
254 }
255
256 int instanceKlassKlass::oop_adjust_pointers(oop obj) {
257 assert(obj->is_klass(),"must be a klass");
258 assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
259
260 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
261 ik->vtable()->oop_adjust_pointers();
262 ik->itable()->oop_adjust_pointers();
263
264 MarkSweep::adjust_pointer(ik->adr_array_klasses());
265 MarkSweep::adjust_pointer(ik->adr_methods());
266 MarkSweep::adjust_pointer(ik->adr_method_ordering());
267 MarkSweep::adjust_pointer(ik->adr_local_interfaces());
268 MarkSweep::adjust_pointer(ik->adr_transitive_interfaces());
269 MarkSweep::adjust_pointer(ik->adr_fields());
270 MarkSweep::adjust_pointer(ik->adr_constants());
271 MarkSweep::adjust_pointer(ik->adr_class_loader());
272 MarkSweep::adjust_pointer(ik->adr_protection_domain());
273 MarkSweep::adjust_pointer(ik->adr_host_klass());
274 MarkSweep::adjust_pointer(ik->adr_signers());
275 MarkSweep::adjust_pointer(ik->adr_inner_classes());
276 for (int i = 0; i < instanceKlass::implementors_limit; i++) {
277 MarkSweep::adjust_pointer(&ik->adr_implementors()[i]);
278 }
279 MarkSweep::adjust_pointer(ik->adr_class_annotations());
280 MarkSweep::adjust_pointer(ik->adr_fields_annotations());
281 MarkSweep::adjust_pointer(ik->adr_methods_annotations());
282 MarkSweep::adjust_pointer(ik->adr_methods_parameter_annotations());
283 MarkSweep::adjust_pointer(ik->adr_methods_default_annotations());
284
285 iterate_c_heap_oops(ik, &MarkSweep::adjust_root_pointer_closure);
286
287 return klassKlass::oop_adjust_pointers(obj);
288 }
289
290 #ifndef SERIALGC
291 void instanceKlassKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
292 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
293
294 oop* loader_addr = ik->adr_class_loader();
295 if (PSScavenge::should_scavenge(loader_addr)) {
296 pm->claim_or_forward_depth(loader_addr);
297 }
298
299 oop* pd_addr = ik->adr_protection_domain();
300 if (PSScavenge::should_scavenge(pd_addr)) {
301 pm->claim_or_forward_depth(pd_addr);
302 }
303
304 oop* hk_addr = ik->adr_host_klass();
305 if (PSScavenge::should_scavenge(hk_addr)) {
306 pm->claim_or_forward_depth(hk_addr);
307 }
308
309 oop* sg_addr = ik->adr_signers();
310 if (PSScavenge::should_scavenge(sg_addr)) {
311 pm->claim_or_forward_depth(sg_addr);
312 }
313
314 klassKlass::oop_push_contents(pm, obj);
315 }
316
317 int instanceKlassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
318 assert(obj->is_klass(),"must be a klass");
319 assert(klassOop(obj)->klass_part()->oop_is_instance_slow(),
320 "must be instance klass");
321
322 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
323 ik->vtable()->oop_update_pointers(cm);
324 ik->itable()->oop_update_pointers(cm);
325
326 oop* const beg_oop = ik->oop_block_beg();
327 oop* const end_oop = ik->oop_block_end();
328 for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
329 PSParallelCompact::adjust_pointer(cur_oop);
330 }
331
332 OopClosure* closure = PSParallelCompact::adjust_root_pointer_closure();
333 iterate_c_heap_oops(ik, closure);
334
335 klassKlass::oop_update_pointers(cm, obj);
336 return ik->object_size();
337 }
338
339 #endif // SERIALGC
340
341 klassOop
342 instanceKlassKlass::allocate_instance_klass(Symbol* name, int vtable_len, int itable_len,
343 int static_field_size,
344 unsigned nonstatic_oop_map_count,
345 ReferenceType rt, TRAPS) {
346
347 const int nonstatic_oop_map_size =
348 instanceKlass::nonstatic_oop_map_size(nonstatic_oop_map_count);
349 int size = instanceKlass::object_size(align_object_offset(vtable_len) + align_object_offset(itable_len) + nonstatic_oop_map_size);
350
351 // Allocation
352 KlassHandle h_this_klass(THREAD, as_klassOop());
353 KlassHandle k;
354 if (rt == REF_NONE) {
355 if (name != vmSymbols::java_lang_Class()) {
356 // regular klass
357 instanceKlass o;
358 k = base_create_klass(h_this_klass, size, o.vtbl_value(), CHECK_NULL);
359 } else {
360 // Class
361 instanceMirrorKlass o;
362 k = base_create_klass(h_this_klass, size, o.vtbl_value(), CHECK_NULL);
363 }
364 } else {
365 // reference klass
366 instanceRefKlass o;
367 k = base_create_klass(h_this_klass, size, o.vtbl_value(), CHECK_NULL);
368 }
369 {
370 No_Safepoint_Verifier no_safepoint; // until k becomes parsable
371 instanceKlass* ik = (instanceKlass*) k()->klass_part();
372 assert(!k()->is_parsable(), "not expecting parsability yet.");
373
374 // The sizes of these these three variables are used for determining the
375 // size of the instanceKlassOop. It is critical that these are set to the right
376 // sizes before the first GC, i.e., when we allocate the mirror.
377 ik->set_vtable_length(vtable_len);
378 ik->set_itable_length(itable_len);
379 ik->set_static_field_size(static_field_size);
380 ik->set_nonstatic_oop_map_size(nonstatic_oop_map_size);
381 assert(k()->size() == size, "wrong size for object");
382
383 ik->set_array_klasses(NULL);
384 ik->set_methods(NULL);
385 ik->set_method_ordering(NULL);
386 ik->set_local_interfaces(NULL);
387 ik->set_transitive_interfaces(NULL);
388 ik->init_implementor();
389 ik->set_fields(NULL);
390 ik->set_constants(NULL);
391 ik->set_class_loader(NULL);
392 ik->set_protection_domain(NULL);
393 ik->set_host_klass(NULL);
394 ik->set_signers(NULL);
395 ik->set_source_file_name(NULL);
396 ik->set_source_debug_extension(NULL);
397 ik->set_source_debug_extension(NULL);
398 ik->set_array_name(NULL);
399 ik->set_inner_classes(NULL);
400 ik->set_static_oop_field_count(0);
401 ik->set_nonstatic_field_size(0);
402 ik->set_is_marked_dependent(false);
403 ik->set_init_state(instanceKlass::allocated);
404 ik->set_init_thread(NULL);
405 ik->set_reference_type(rt);
406 ik->set_oop_map_cache(NULL);
407 ik->set_jni_ids(NULL);
408 ik->set_osr_nmethods_head(NULL);
409 ik->set_breakpoints(NULL);
410 ik->init_previous_versions();
411 ik->set_generic_signature(NULL);
412 ik->release_set_methods_jmethod_ids(NULL);
413 ik->release_set_methods_cached_itable_indices(NULL);
414 ik->set_class_annotations(NULL);
415 ik->set_fields_annotations(NULL);
416 ik->set_methods_annotations(NULL);
417 ik->set_methods_parameter_annotations(NULL);
418 ik->set_methods_default_annotations(NULL);
419 ik->set_enclosing_method_indices(0, 0);
420 ik->set_jvmti_cached_class_field_map(NULL);
421 ik->set_initial_method_idnum(0);
422 assert(k()->is_parsable(), "should be parsable here.");
423
424 // initialize the non-header words to zero
425 intptr_t* p = (intptr_t*)k();
426 for (int index = instanceKlass::header_size(); index < size; index++) {
427 p[index] = NULL_WORD;
428 }
429
430 // To get verify to work - must be set to partial loaded before first GC point.
431 k()->set_partially_loaded();
432 }
433 return k();
434 }
435
436
437
438 #ifndef PRODUCT
439
440 // Printing
441
442 #define BULLET " - "
443
444 static const char* state_names[] = {
445 "unparseable_by_gc", "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
446 };
447
448
449 void instanceKlassKlass::oop_print_on(oop obj, outputStream* st) {
450 assert(obj->is_klass(), "must be klass");
451 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
452 klassKlass::oop_print_on(obj, st);
453
454 st->print(BULLET"instance size: %d", ik->size_helper()); st->cr();
455 st->print(BULLET"klass size: %d", ik->object_size()); st->cr();
456 st->print(BULLET"access: "); ik->access_flags().print_on(st); st->cr();
457 st->print(BULLET"state: "); st->print_cr(state_names[ik->_init_state]);
458 st->print(BULLET"name: "); ik->name()->print_value_on(st); st->cr();
459 st->print(BULLET"super: "); ik->super()->print_value_on(st); st->cr();
460 st->print(BULLET"sub: ");
461 Klass* sub = ik->subklass();
462 int n;
463 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) {
464 if (n < MaxSubklassPrintSize) {
465 sub->as_klassOop()->print_value_on(st);
466 st->print(" ");
467 }
468 }
469 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize);
470 st->cr();
471
472 if (ik->is_interface()) {
473 st->print_cr(BULLET"nof implementors: %d", ik->nof_implementors());
474 int print_impl = 0;
475 for (int i = 0; i < instanceKlass::implementors_limit; i++) {
476 if (ik->implementor(i) != NULL) {
477 if (++print_impl == 1)
478 st->print_cr(BULLET"implementor: ");
479 st->print(" ");
480 ik->implementor(i)->print_value_on(st);
481 }
482 }
483 if (print_impl > 0) st->cr();
484 }
485
486 st->print(BULLET"arrays: "); ik->array_klasses()->print_value_on(st); st->cr();
487 st->print(BULLET"methods: "); ik->methods()->print_value_on(st); st->cr();
488 if (Verbose) {
489 objArrayOop methods = ik->methods();
490 for(int i = 0; i < methods->length(); i++) {
491 tty->print("%d : ", i); methods->obj_at(i)->print_value(); tty->cr();
492 }
493 }
494 st->print(BULLET"method ordering: "); ik->method_ordering()->print_value_on(st); st->cr();
495 st->print(BULLET"local interfaces: "); ik->local_interfaces()->print_value_on(st); st->cr();
496 st->print(BULLET"trans. interfaces: "); ik->transitive_interfaces()->print_value_on(st); st->cr();
497 st->print(BULLET"constants: "); ik->constants()->print_value_on(st); st->cr();
498 st->print(BULLET"class loader: "); ik->class_loader()->print_value_on(st); st->cr();
499 st->print(BULLET"protection domain: "); ik->protection_domain()->print_value_on(st); st->cr();
500 st->print(BULLET"host class: "); ik->host_klass()->print_value_on(st); st->cr();
501 st->print(BULLET"signers: "); ik->signers()->print_value_on(st); st->cr();
502 if (ik->source_file_name() != NULL) {
503 st->print(BULLET"source file: ");
504 ik->source_file_name()->print_value_on(st);
505 st->cr();
506 }
507 if (ik->source_debug_extension() != NULL) {
508 st->print(BULLET"source debug extension: ");
509 ik->source_debug_extension()->print_value_on(st);
510 st->cr();
511 }
512
513 {
514 ResourceMark rm;
515 // PreviousVersionInfo objects returned via PreviousVersionWalker
516 // contain a GrowableArray of handles. We have to clean up the
517 // GrowableArray _after_ the PreviousVersionWalker destructor
518 // has destroyed the handles.
519 {
520 bool have_pv = false;
521 PreviousVersionWalker pvw(ik);
522 for (PreviousVersionInfo * pv_info = pvw.next_previous_version();
523 pv_info != NULL; pv_info = pvw.next_previous_version()) {
524 if (!have_pv)
525 st->print(BULLET"previous version: ");
526 have_pv = true;
527 pv_info->prev_constant_pool_handle()()->print_value_on(st);
528 }
529 if (have_pv) st->cr();
530 } // pvw is cleaned up
531 } // rm is cleaned up
532
533 if (ik->generic_signature() != NULL) {
534 st->print(BULLET"generic signature: ");
535 ik->generic_signature()->print_value_on(st);
536 st->cr();
537 }
538 st->print(BULLET"inner classes: "); ik->inner_classes()->print_value_on(st); st->cr();
539 st->print(BULLET"java mirror: "); ik->java_mirror()->print_value_on(st); st->cr();
540 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", ik->vtable_length(), ik->start_of_vtable()); st->cr();
541 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", ik->itable_length(), ik->start_of_itable()); st->cr();
542 st->print_cr(BULLET"---- static fields (%d words):", ik->static_field_size());
543 FieldPrinter print_static_field(st);
544 ik->do_local_static_fields(&print_static_field);
545 st->print_cr(BULLET"---- non-static fields (%d words):", ik->nonstatic_field_size());
546 FieldPrinter print_nonstatic_field(st);
547 ik->do_nonstatic_fields(&print_nonstatic_field);
548
549 st->print(BULLET"non-static oop maps: ");
550 OopMapBlock* map = ik->start_of_nonstatic_oop_maps();
551 OopMapBlock* end_map = map + ik->nonstatic_oop_map_count();
552 while (map < end_map) {
553 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
554 map++;
555 }
556 st->cr();
557 }
558
559 #endif //PRODUCT
560
561 void instanceKlassKlass::oop_print_value_on(oop obj, outputStream* st) {
562 assert(obj->is_klass(), "must be klass");
563 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
564 ik->name()->print_value_on(st);
565 }
566
567 const char* instanceKlassKlass::internal_name() const {
568 return "{instance class}";
569 }
570
571 // Verification
572
573 class VerifyFieldClosure: public OopClosure {
574 protected:
575 template <class T> void do_oop_work(T* p) {
576 guarantee(Universe::heap()->is_in(p), "should be in heap");
577 oop obj = oopDesc::load_decode_heap_oop(p);
578 guarantee(obj->is_oop_or_null(), "should be in heap");
579 }
580 public:
581 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); }
582 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); }
583 };
584
585 void instanceKlassKlass::oop_verify_on(oop obj, outputStream* st) {
586 klassKlass::oop_verify_on(obj, st);
587 if (!obj->partially_loaded()) {
588 Thread *thread = Thread::current();
589 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
590
591 #ifndef PRODUCT
592 // Avoid redundant verifies
593 if (ik->_verify_count == Universe::verify_count()) return;
594 ik->_verify_count = Universe::verify_count();
595 #endif
596 // Verify that klass is present in SystemDictionary
597 if (ik->is_loaded() && !ik->is_anonymous()) {
598 Symbol* h_name = ik->name();
599 Handle h_loader (thread, ik->class_loader());
600 Handle h_obj(thread, obj);
601 SystemDictionary::verify_obj_klass_present(h_obj, h_name, h_loader);
602 }
603
604 // Verify static fields
605 VerifyFieldClosure blk;
606
607 // Verify vtables
608 if (ik->is_linked()) {
609 ResourceMark rm(thread);
610 // $$$ This used to be done only for m/s collections. Doing it
611 // always seemed a valid generalization. (DLD -- 6/00)
612 ik->vtable()->verify(st);
613 }
614
615 // Verify oop map cache
616 if (ik->oop_map_cache() != NULL) {
617 ik->oop_map_cache()->verify();
618 }
619
620 // Verify first subklass
621 if (ik->subklass_oop() != NULL) {
622 guarantee(ik->subklass_oop()->is_perm(), "should be in permspace");
623 guarantee(ik->subklass_oop()->is_klass(), "should be klass");
624 }
625
626 // Verify siblings
627 klassOop super = ik->super();
628 Klass* sib = ik->next_sibling();
629 int sib_count = 0;
630 while (sib != NULL) {
631 if (sib == ik) {
632 fatal(err_msg("subclass cycle of length %d", sib_count));
633 }
634 if (sib_count >= 100000) {
635 fatal(err_msg("suspiciously long subclass list %d", sib_count));
636 }
637 guarantee(sib->as_klassOop()->is_klass(), "should be klass");
638 guarantee(sib->as_klassOop()->is_perm(), "should be in permspace");
639 guarantee(sib->super() == super, "siblings should have same superklass");
640 sib = sib->next_sibling();
641 }
642
643 // Verify implementor fields
644 bool saw_null_impl = false;
645 for (int i = 0; i < instanceKlass::implementors_limit; i++) {
646 klassOop im = ik->implementor(i);
647 if (im == NULL) { saw_null_impl = true; continue; }
648 guarantee(!saw_null_impl, "non-nulls must preceded all nulls");
649 guarantee(ik->is_interface(), "only interfaces should have implementor set");
650 guarantee(i < ik->nof_implementors(), "should only have one implementor");
651 guarantee(im->is_perm(), "should be in permspace");
652 guarantee(im->is_klass(), "should be klass");
653 guarantee(!Klass::cast(klassOop(im))->is_interface(), "implementors cannot be interfaces");
654 }
655
656 // Verify local interfaces
657 objArrayOop local_interfaces = ik->local_interfaces();
658 guarantee(local_interfaces->is_perm(), "should be in permspace");
659 guarantee(local_interfaces->is_objArray(), "should be obj array");
660 int j;
661 for (j = 0; j < local_interfaces->length(); j++) {
662 oop e = local_interfaces->obj_at(j);
663 guarantee(e->is_klass() && Klass::cast(klassOop(e))->is_interface(), "invalid local interface");
664 }
665
666 // Verify transitive interfaces
667 objArrayOop transitive_interfaces = ik->transitive_interfaces();
668 guarantee(transitive_interfaces->is_perm(), "should be in permspace");
669 guarantee(transitive_interfaces->is_objArray(), "should be obj array");
670 for (j = 0; j < transitive_interfaces->length(); j++) {
671 oop e = transitive_interfaces->obj_at(j);
672 guarantee(e->is_klass() && Klass::cast(klassOop(e))->is_interface(), "invalid transitive interface");
673 }
674
675 // Verify methods
676 objArrayOop methods = ik->methods();
677 guarantee(methods->is_perm(), "should be in permspace");
678 guarantee(methods->is_objArray(), "should be obj array");
679 for (j = 0; j < methods->length(); j++) {
680 guarantee(methods->obj_at(j)->is_method(), "non-method in methods array");
681 }
682 for (j = 0; j < methods->length() - 1; j++) {
683 methodOop m1 = methodOop(methods->obj_at(j));
684 methodOop m2 = methodOop(methods->obj_at(j + 1));
685 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly");
686 }
687
688 // Verify method ordering
689 typeArrayOop method_ordering = ik->method_ordering();
690 guarantee(method_ordering->is_perm(), "should be in permspace");
691 guarantee(method_ordering->is_typeArray(), "should be type array");
692 int length = method_ordering->length();
693 if (JvmtiExport::can_maintain_original_method_order() ||
694 (UseSharedSpaces && length != 0)) {
695 guarantee(length == methods->length(), "invalid method ordering length");
696 jlong sum = 0;
697 for (j = 0; j < length; j++) {
698 int original_index = method_ordering->int_at(j);
699 guarantee(original_index >= 0 && original_index < length, "invalid method ordering index");
700 sum += original_index;
701 }
702 // Verify sum of indices 0,1,...,length-1
703 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum");
704 } else {
705 guarantee(length == 0, "invalid method ordering length");
706 }
707
708 // Verify JNI static field identifiers
709 if (ik->jni_ids() != NULL) {
710 ik->jni_ids()->verify(ik->as_klassOop());
711 }
712
713 // Verify other fields
714 if (ik->array_klasses() != NULL) {
715 guarantee(ik->array_klasses()->is_perm(), "should be in permspace");
716 guarantee(ik->array_klasses()->is_klass(), "should be klass");
717 }
718 guarantee(ik->fields()->is_perm(), "should be in permspace");
719 guarantee(ik->fields()->is_typeArray(), "should be type array");
720 guarantee(ik->constants()->is_perm(), "should be in permspace");
721 guarantee(ik->constants()->is_constantPool(), "should be constant pool");
722 guarantee(ik->inner_classes()->is_perm(), "should be in permspace");
723 guarantee(ik->inner_classes()->is_typeArray(), "should be type array");
724 if (ik->protection_domain() != NULL) {
725 guarantee(ik->protection_domain()->is_oop(), "should be oop");
726 }
727 if (ik->host_klass() != NULL) {
728 guarantee(ik->host_klass()->is_oop(), "should be oop");
729 }
730 if (ik->signers() != NULL) {
731 guarantee(ik->signers()->is_objArray(), "should be obj array");
732 }
733 if (ik->class_annotations() != NULL) {
734 guarantee(ik->class_annotations()->is_typeArray(), "should be type array");
735 }
736 if (ik->fields_annotations() != NULL) {
737 guarantee(ik->fields_annotations()->is_objArray(), "should be obj array");
738 }
739 if (ik->methods_annotations() != NULL) {
740 guarantee(ik->methods_annotations()->is_objArray(), "should be obj array");
741 }
742 if (ik->methods_parameter_annotations() != NULL) {
743 guarantee(ik->methods_parameter_annotations()->is_objArray(), "should be obj array");
744 }
745 if (ik->methods_default_annotations() != NULL) {
746 guarantee(ik->methods_default_annotations()->is_objArray(), "should be obj array");
747 }
748 }
749 }
750
751
752 bool instanceKlassKlass::oop_partially_loaded(oop obj) const {
753 assert(obj->is_klass(), "object must be klass");
754 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
755 assert(ik->oop_is_instance(), "object must be instanceKlass");
756 return ik->transitive_interfaces() == (objArrayOop) obj; // Check whether transitive_interfaces points to self
757 }
758
759
760 // The transitive_interfaces is the last field set when loading an object.
761 void instanceKlassKlass::oop_set_partially_loaded(oop obj) {
762 assert(obj->is_klass(), "object must be klass");
763 instanceKlass* ik = instanceKlass::cast(klassOop(obj));
764 // Set the layout helper to a place-holder value, until fuller initialization.
765 // (This allows asserts in oop_is_instance to succeed.)
766 ik->set_layout_helper(Klass::instance_layout_helper(0, true));
767 assert(ik->oop_is_instance(), "object must be instanceKlass");
768 assert(ik->transitive_interfaces() == NULL, "just checking");
769 ik->set_transitive_interfaces((objArrayOop) obj); // Temporarily set transitive_interfaces to point to self
770 }