Mercurial > hg > truffle
annotate src/share/vm/oops/klass.cpp @ 3746:537a4053b0f9
7042740: CMS: assert(n> q) failed: Looping at: ... blockOffsetTable.cpp:557
Summary: Do a one-step look-ahead, when sweeping free or garbage blocks, to avoid overstepping sweep limit, which may become a non-block-boundary because of a heap expansion delta coalescing with a previously co-terminal free block.
Reviewed-by: brutisso, tonyp
author | ysr |
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date | Mon, 23 May 2011 16:42:14 -0700 |
parents | 8ce625481709 |
children | be4ca325525a 069ab3f976d3 94ec88ca68e2 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "gc_interface/collectedHeap.inline.hpp" | |
29 #include "memory/oopFactory.hpp" | |
30 #include "memory/resourceArea.hpp" | |
31 #include "oops/instanceKlass.hpp" | |
32 #include "oops/klass.inline.hpp" | |
33 #include "oops/klassOop.hpp" | |
34 #include "oops/oop.inline.hpp" | |
35 #include "oops/oop.inline2.hpp" | |
36 #include "runtime/atomic.hpp" | |
0 | 37 |
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38 void Klass::set_name(Symbol* n) { |
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39 _name = n; |
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40 if (_name != NULL) _name->increment_refcount(); |
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41 } |
0 | 42 |
43 bool Klass::is_subclass_of(klassOop k) const { | |
44 // Run up the super chain and check | |
45 klassOop t = as_klassOop(); | |
46 | |
47 if (t == k) return true; | |
48 t = Klass::cast(t)->super(); | |
49 | |
50 while (t != NULL) { | |
51 if (t == k) return true; | |
52 t = Klass::cast(t)->super(); | |
53 } | |
54 return false; | |
55 } | |
56 | |
57 bool Klass::search_secondary_supers(klassOop k) const { | |
58 // Put some extra logic here out-of-line, before the search proper. | |
59 // This cuts down the size of the inline method. | |
60 | |
61 // This is necessary, since I am never in my own secondary_super list. | |
62 if (this->as_klassOop() == k) | |
63 return true; | |
64 // Scan the array-of-objects for a match | |
65 int cnt = secondary_supers()->length(); | |
66 for (int i = 0; i < cnt; i++) { | |
67 if (secondary_supers()->obj_at(i) == k) { | |
68 ((Klass*)this)->set_secondary_super_cache(k); | |
69 return true; | |
70 } | |
71 } | |
72 return false; | |
73 } | |
74 | |
75 // Return self, except for abstract classes with exactly 1 | |
76 // implementor. Then return the 1 concrete implementation. | |
77 Klass *Klass::up_cast_abstract() { | |
78 Klass *r = this; | |
79 while( r->is_abstract() ) { // Receiver is abstract? | |
80 Klass *s = r->subklass(); // Check for exactly 1 subklass | |
81 if( !s || s->next_sibling() ) // Oops; wrong count; give up | |
82 return this; // Return 'this' as a no-progress flag | |
83 r = s; // Loop till find concrete class | |
84 } | |
85 return r; // Return the 1 concrete class | |
86 } | |
87 | |
605 | 88 // Find LCA in class hierarchy |
0 | 89 Klass *Klass::LCA( Klass *k2 ) { |
90 Klass *k1 = this; | |
91 while( 1 ) { | |
92 if( k1->is_subtype_of(k2->as_klassOop()) ) return k2; | |
93 if( k2->is_subtype_of(k1->as_klassOop()) ) return k1; | |
94 k1 = k1->super()->klass_part(); | |
95 k2 = k2->super()->klass_part(); | |
96 } | |
97 } | |
98 | |
99 | |
100 void Klass::check_valid_for_instantiation(bool throwError, TRAPS) { | |
101 ResourceMark rm(THREAD); | |
102 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
103 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
104 } | |
105 | |
106 | |
107 void Klass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) { | |
108 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
109 } | |
110 | |
111 | |
112 void Klass::initialize(TRAPS) { | |
113 ShouldNotReachHere(); | |
114 } | |
115 | |
116 bool Klass::compute_is_subtype_of(klassOop k) { | |
117 assert(k->is_klass(), "argument must be a class"); | |
118 return is_subclass_of(k); | |
119 } | |
120 | |
121 | |
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122 methodOop Klass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
0 | 123 #ifdef ASSERT |
124 tty->print_cr("Error: uncached_lookup_method called on a klass oop." | |
125 " Likely error: reflection method does not correctly" | |
126 " wrap return value in a mirror object."); | |
127 #endif | |
128 ShouldNotReachHere(); | |
129 return NULL; | |
130 } | |
131 | |
132 klassOop Klass::base_create_klass_oop(KlassHandle& klass, int size, | |
133 const Klass_vtbl& vtbl, TRAPS) { | |
134 size = align_object_size(size); | |
135 // allocate and initialize vtable | |
136 Klass* kl = (Klass*) vtbl.allocate_permanent(klass, size, CHECK_NULL); | |
137 klassOop k = kl->as_klassOop(); | |
138 | |
139 { // Preinitialize supertype information. | |
140 // A later call to initialize_supers() may update these settings: | |
141 kl->set_super(NULL); | |
142 for (juint i = 0; i < Klass::primary_super_limit(); i++) { | |
143 kl->_primary_supers[i] = NULL; | |
144 } | |
145 kl->set_secondary_supers(NULL); | |
146 oop_store_without_check((oop*) &kl->_primary_supers[0], k); | |
147 kl->set_super_check_offset(primary_supers_offset_in_bytes() + sizeof(oopDesc)); | |
148 } | |
149 | |
150 kl->set_java_mirror(NULL); | |
151 kl->set_modifier_flags(0); | |
152 kl->set_layout_helper(Klass::_lh_neutral_value); | |
153 kl->set_name(NULL); | |
154 AccessFlags af; | |
155 af.set_flags(0); | |
156 kl->set_access_flags(af); | |
157 kl->set_subklass(NULL); | |
158 kl->set_next_sibling(NULL); | |
159 kl->set_alloc_count(0); | |
160 kl->set_alloc_size(0); | |
161 | |
162 kl->set_prototype_header(markOopDesc::prototype()); | |
163 kl->set_biased_lock_revocation_count(0); | |
164 kl->set_last_biased_lock_bulk_revocation_time(0); | |
165 | |
166 return k; | |
167 } | |
168 | |
169 KlassHandle Klass::base_create_klass(KlassHandle& klass, int size, | |
170 const Klass_vtbl& vtbl, TRAPS) { | |
171 klassOop ek = base_create_klass_oop(klass, size, vtbl, THREAD); | |
172 return KlassHandle(THREAD, ek); | |
173 } | |
174 | |
175 void Klass_vtbl::post_new_init_klass(KlassHandle& klass, | |
176 klassOop new_klass, | |
177 int size) const { | |
178 assert(!new_klass->klass_part()->null_vtbl(), "Not a complete klass"); | |
179 CollectedHeap::post_allocation_install_obj_klass(klass, new_klass, size); | |
180 } | |
181 | |
182 void* Klass_vtbl::operator new(size_t ignored, KlassHandle& klass, | |
183 int size, TRAPS) { | |
184 // The vtable pointer is installed during the execution of | |
185 // constructors in the call to permanent_obj_allocate(). Delay | |
186 // the installation of the klass pointer into the new klass "k" | |
187 // until after the vtable pointer has been installed (i.e., until | |
188 // after the return of permanent_obj_allocate(). | |
189 klassOop k = | |
190 (klassOop) CollectedHeap::permanent_obj_allocate_no_klass_install(klass, | |
191 size, CHECK_NULL); | |
192 return k->klass_part(); | |
193 } | |
194 | |
195 jint Klass::array_layout_helper(BasicType etype) { | |
196 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype"); | |
197 // Note that T_ARRAY is not allowed here. | |
198 int hsize = arrayOopDesc::base_offset_in_bytes(etype); | |
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199 int esize = type2aelembytes(etype); |
0 | 200 bool isobj = (etype == T_OBJECT); |
201 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value; | |
202 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize)); | |
203 | |
204 assert(lh < (int)_lh_neutral_value, "must look like an array layout"); | |
205 assert(layout_helper_is_javaArray(lh), "correct kind"); | |
206 assert(layout_helper_is_objArray(lh) == isobj, "correct kind"); | |
207 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind"); | |
208 assert(layout_helper_header_size(lh) == hsize, "correct decode"); | |
209 assert(layout_helper_element_type(lh) == etype, "correct decode"); | |
210 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode"); | |
211 | |
212 return lh; | |
213 } | |
214 | |
215 bool Klass::can_be_primary_super_slow() const { | |
216 if (super() == NULL) | |
217 return true; | |
218 else if (super()->klass_part()->super_depth() >= primary_super_limit()-1) | |
219 return false; | |
220 else | |
221 return true; | |
222 } | |
223 | |
224 void Klass::initialize_supers(klassOop k, TRAPS) { | |
225 if (FastSuperclassLimit == 0) { | |
226 // None of the other machinery matters. | |
227 set_super(k); | |
228 return; | |
229 } | |
230 if (k == NULL) { | |
231 set_super(NULL); | |
232 oop_store_without_check((oop*) &_primary_supers[0], (oop) this->as_klassOop()); | |
233 assert(super_depth() == 0, "Object must already be initialized properly"); | |
1142 | 234 } else if (k != super() || k == SystemDictionary::Object_klass()) { |
235 assert(super() == NULL || super() == SystemDictionary::Object_klass(), | |
0 | 236 "initialize this only once to a non-trivial value"); |
237 set_super(k); | |
238 Klass* sup = k->klass_part(); | |
239 int sup_depth = sup->super_depth(); | |
240 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit()); | |
241 if (!can_be_primary_super_slow()) | |
242 my_depth = primary_super_limit(); | |
243 for (juint i = 0; i < my_depth; i++) { | |
244 oop_store_without_check((oop*) &_primary_supers[i], (oop) sup->_primary_supers[i]); | |
245 } | |
246 klassOop *super_check_cell; | |
247 if (my_depth < primary_super_limit()) { | |
248 oop_store_without_check((oop*) &_primary_supers[my_depth], (oop) this->as_klassOop()); | |
249 super_check_cell = &_primary_supers[my_depth]; | |
250 } else { | |
251 // Overflow of the primary_supers array forces me to be secondary. | |
252 super_check_cell = &_secondary_super_cache; | |
253 } | |
254 set_super_check_offset((address)super_check_cell - (address) this->as_klassOop()); | |
255 | |
256 #ifdef ASSERT | |
257 { | |
258 juint j = super_depth(); | |
259 assert(j == my_depth, "computed accessor gets right answer"); | |
260 klassOop t = as_klassOop(); | |
261 while (!Klass::cast(t)->can_be_primary_super()) { | |
262 t = Klass::cast(t)->super(); | |
263 j = Klass::cast(t)->super_depth(); | |
264 } | |
265 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) { | |
266 assert(primary_super_of_depth(j1) == NULL, "super list padding"); | |
267 } | |
268 while (t != NULL) { | |
269 assert(primary_super_of_depth(j) == t, "super list initialization"); | |
270 t = Klass::cast(t)->super(); | |
271 --j; | |
272 } | |
273 assert(j == (juint)-1, "correct depth count"); | |
274 } | |
275 #endif | |
276 } | |
277 | |
278 if (secondary_supers() == NULL) { | |
279 KlassHandle this_kh (THREAD, this); | |
280 | |
281 // Now compute the list of secondary supertypes. | |
282 // Secondaries can occasionally be on the super chain, | |
283 // if the inline "_primary_supers" array overflows. | |
284 int extras = 0; | |
285 klassOop p; | |
286 for (p = super(); !(p == NULL || p->klass_part()->can_be_primary_super()); p = p->klass_part()->super()) { | |
287 ++extras; | |
288 } | |
289 | |
290 // Compute the "real" non-extra secondaries. | |
291 objArrayOop secondary_oops = compute_secondary_supers(extras, CHECK); | |
292 objArrayHandle secondaries (THREAD, secondary_oops); | |
293 | |
294 // Store the extra secondaries in the first array positions: | |
295 int fillp = extras; | |
296 for (p = this_kh->super(); !(p == NULL || p->klass_part()->can_be_primary_super()); p = p->klass_part()->super()) { | |
297 int i; // Scan for overflow primaries being duplicates of 2nd'arys | |
298 | |
299 // This happens frequently for very deeply nested arrays: the | |
300 // primary superclass chain overflows into the secondary. The | |
301 // secondary list contains the element_klass's secondaries with | |
302 // an extra array dimension added. If the element_klass's | |
303 // secondary list already contains some primary overflows, they | |
304 // (with the extra level of array-ness) will collide with the | |
305 // normal primary superclass overflows. | |
306 for( i = extras; i < secondaries->length(); i++ ) | |
307 if( secondaries->obj_at(i) == p ) | |
308 break; | |
309 if( i < secondaries->length() ) | |
310 continue; // It's a dup, don't put it in | |
311 secondaries->obj_at_put(--fillp, p); | |
312 } | |
313 // See if we had some dup's, so the array has holes in it. | |
314 if( fillp > 0 ) { | |
315 // Pack the array. Drop the old secondaries array on the floor | |
316 // and let GC reclaim it. | |
317 objArrayOop s2 = oopFactory::new_system_objArray(secondaries->length() - fillp, CHECK); | |
318 for( int i = 0; i < s2->length(); i++ ) | |
319 s2->obj_at_put( i, secondaries->obj_at(i+fillp) ); | |
320 secondaries = objArrayHandle(THREAD, s2); | |
321 } | |
322 | |
323 #ifdef ASSERT | |
324 if (secondaries() != Universe::the_array_interfaces_array()) { | |
325 // We must not copy any NULL placeholders left over from bootstrap. | |
326 for (int j = 0; j < secondaries->length(); j++) { | |
327 assert(secondaries->obj_at(j) != NULL, "correct bootstrapping order"); | |
328 } | |
329 } | |
330 #endif | |
331 | |
332 this_kh->set_secondary_supers(secondaries()); | |
333 } | |
334 } | |
335 | |
336 objArrayOop Klass::compute_secondary_supers(int num_extra_slots, TRAPS) { | |
337 assert(num_extra_slots == 0, "override for complex klasses"); | |
338 return Universe::the_empty_system_obj_array(); | |
339 } | |
340 | |
341 | |
342 Klass* Klass::subklass() const { | |
343 return _subklass == NULL ? NULL : Klass::cast(_subklass); | |
344 } | |
345 | |
346 instanceKlass* Klass::superklass() const { | |
347 assert(super() == NULL || super()->klass_part()->oop_is_instance(), "must be instance klass"); | |
348 return _super == NULL ? NULL : instanceKlass::cast(_super); | |
349 } | |
350 | |
351 Klass* Klass::next_sibling() const { | |
352 return _next_sibling == NULL ? NULL : Klass::cast(_next_sibling); | |
353 } | |
354 | |
355 void Klass::set_subklass(klassOop s) { | |
356 assert(s != as_klassOop(), "sanity check"); | |
357 oop_store_without_check((oop*)&_subklass, s); | |
358 } | |
359 | |
360 void Klass::set_next_sibling(klassOop s) { | |
361 assert(s != as_klassOop(), "sanity check"); | |
362 oop_store_without_check((oop*)&_next_sibling, s); | |
363 } | |
364 | |
365 void Klass::append_to_sibling_list() { | |
366 debug_only(if (!SharedSkipVerify) as_klassOop()->verify();) | |
367 // add ourselves to superklass' subklass list | |
368 instanceKlass* super = superklass(); | |
369 if (super == NULL) return; // special case: class Object | |
370 assert(SharedSkipVerify || | |
371 (!super->is_interface() // interfaces cannot be supers | |
372 && (super->superklass() == NULL || !is_interface())), | |
373 "an interface can only be a subklass of Object"); | |
374 klassOop prev_first_subklass = super->subklass_oop(); | |
375 if (prev_first_subklass != NULL) { | |
376 // set our sibling to be the superklass' previous first subklass | |
377 set_next_sibling(prev_first_subklass); | |
378 } | |
379 // make ourselves the superklass' first subklass | |
380 super->set_subklass(as_klassOop()); | |
381 debug_only(if (!SharedSkipVerify) as_klassOop()->verify();) | |
382 } | |
383 | |
384 void Klass::remove_from_sibling_list() { | |
385 // remove receiver from sibling list | |
386 instanceKlass* super = superklass(); | |
1142 | 387 assert(super != NULL || as_klassOop() == SystemDictionary::Object_klass(), "should have super"); |
0 | 388 if (super == NULL) return; // special case: class Object |
389 if (super->subklass() == this) { | |
390 // first subklass | |
391 super->set_subklass(_next_sibling); | |
392 } else { | |
393 Klass* sib = super->subklass(); | |
394 while (sib->next_sibling() != this) { | |
395 sib = sib->next_sibling(); | |
396 }; | |
397 sib->set_next_sibling(_next_sibling); | |
398 } | |
399 } | |
400 | |
401 void Klass::follow_weak_klass_links( BoolObjectClosure* is_alive, OopClosure* keep_alive) { | |
402 // This klass is alive but the subklass and siblings are not followed/updated. | |
403 // We update the subklass link and the subklass' sibling links here. | |
404 // Our own sibling link will be updated by our superclass (which must be alive | |
405 // since we are). | |
406 assert(is_alive->do_object_b(as_klassOop()), "just checking, this should be live"); | |
407 if (ClassUnloading) { | |
408 klassOop sub = subklass_oop(); | |
409 if (sub != NULL && !is_alive->do_object_b(sub)) { | |
410 // first subklass not alive, find first one alive | |
411 do { | |
412 #ifndef PRODUCT | |
413 if (TraceClassUnloading && WizardMode) { | |
414 ResourceMark rm; | |
415 tty->print_cr("[Unlinking class (subclass) %s]", sub->klass_part()->external_name()); | |
416 } | |
417 #endif | |
418 sub = sub->klass_part()->next_sibling_oop(); | |
419 } while (sub != NULL && !is_alive->do_object_b(sub)); | |
420 set_subklass(sub); | |
421 } | |
422 // now update the subklass' sibling list | |
423 while (sub != NULL) { | |
424 klassOop next = sub->klass_part()->next_sibling_oop(); | |
425 if (next != NULL && !is_alive->do_object_b(next)) { | |
426 // first sibling not alive, find first one alive | |
427 do { | |
428 #ifndef PRODUCT | |
429 if (TraceClassUnloading && WizardMode) { | |
430 ResourceMark rm; | |
431 tty->print_cr("[Unlinking class (sibling) %s]", next->klass_part()->external_name()); | |
432 } | |
433 #endif | |
434 next = next->klass_part()->next_sibling_oop(); | |
435 } while (next != NULL && !is_alive->do_object_b(next)); | |
436 sub->klass_part()->set_next_sibling(next); | |
437 } | |
438 sub = next; | |
439 } | |
440 } else { | |
441 // Always follow subklass and sibling link. This will prevent any klasses from | |
442 // being unloaded (all classes are transitively linked from java.lang.Object). | |
443 keep_alive->do_oop(adr_subklass()); | |
444 keep_alive->do_oop(adr_next_sibling()); | |
445 } | |
446 } | |
447 | |
448 | |
449 void Klass::remove_unshareable_info() { | |
450 if (oop_is_instance()) { | |
451 instanceKlass* ik = (instanceKlass*)this; | |
452 if (ik->is_linked()) { | |
453 ik->unlink_class(); | |
454 } | |
455 } | |
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456 // Clear the Java vtable if the oop has one. |
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457 // The vtable isn't shareable because it's in the wrong order wrt the methods |
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458 // once the method names get moved and resorted. |
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459 klassVtable* vt = vtable(); |
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460 if (vt != NULL) { |
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461 assert(oop_is_instance() || oop_is_array(), "nothing else has vtable"); |
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462 vt->clear_vtable(); |
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463 } |
0 | 464 set_subklass(NULL); |
465 set_next_sibling(NULL); | |
466 } | |
467 | |
468 | |
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469 void Klass::shared_symbols_iterate(SymbolClosure* closure) { |
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470 closure->do_symbol(&_name); |
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471 } |
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472 |
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473 |
0 | 474 klassOop Klass::array_klass_or_null(int rank) { |
475 EXCEPTION_MARK; | |
476 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
477 // (In anycase, the execption mark will fail if it do so) | |
478 return array_klass_impl(true, rank, THREAD); | |
479 } | |
480 | |
481 | |
482 klassOop Klass::array_klass_or_null() { | |
483 EXCEPTION_MARK; | |
484 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
485 // (In anycase, the execption mark will fail if it do so) | |
486 return array_klass_impl(true, THREAD); | |
487 } | |
488 | |
489 | |
490 klassOop Klass::array_klass_impl(bool or_null, int rank, TRAPS) { | |
491 fatal("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass"); | |
492 return NULL; | |
493 } | |
494 | |
495 | |
496 klassOop Klass::array_klass_impl(bool or_null, TRAPS) { | |
497 fatal("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass"); | |
498 return NULL; | |
499 } | |
500 | |
501 | |
502 void Klass::with_array_klasses_do(void f(klassOop k)) { | |
503 f(as_klassOop()); | |
504 } | |
505 | |
506 | |
507 const char* Klass::external_name() const { | |
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508 if (oop_is_instance()) { |
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509 instanceKlass* ik = (instanceKlass*) this; |
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510 if (ik->is_anonymous()) { |
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511 assert(EnableInvokeDynamic, ""); |
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512 intptr_t hash = ik->java_mirror()->identity_hash(); |
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513 char hash_buf[40]; |
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514 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash); |
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515 size_t hash_len = strlen(hash_buf); |
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516 |
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517 size_t result_len = name()->utf8_length(); |
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518 char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1); |
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519 name()->as_klass_external_name(result, (int) result_len + 1); |
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520 assert(strlen(result) == result_len, ""); |
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521 strcpy(result + result_len, hash_buf); |
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522 assert(strlen(result) == result_len + hash_len, ""); |
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523 return result; |
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524 } |
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525 } |
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526 if (name() == NULL) return "<unknown>"; |
0 | 527 return name()->as_klass_external_name(); |
528 } | |
529 | |
530 | |
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531 const char* Klass::signature_name() const { |
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532 if (name() == NULL) return "<unknown>"; |
0 | 533 return name()->as_C_string(); |
534 } | |
535 | |
536 // Unless overridden, modifier_flags is 0. | |
537 jint Klass::compute_modifier_flags(TRAPS) const { | |
538 return 0; | |
539 } | |
540 | |
541 int Klass::atomic_incr_biased_lock_revocation_count() { | |
542 return (int) Atomic::add(1, &_biased_lock_revocation_count); | |
543 } | |
544 | |
545 // Unless overridden, jvmti_class_status has no flags set. | |
546 jint Klass::jvmti_class_status() const { | |
547 return 0; | |
548 } | |
549 | |
550 // Printing | |
551 | |
552 void Klass::oop_print_on(oop obj, outputStream* st) { | |
553 ResourceMark rm; | |
554 // print title | |
555 st->print_cr("%s ", internal_name()); | |
556 obj->print_address_on(st); | |
557 | |
558 if (WizardMode) { | |
559 // print header | |
560 obj->mark()->print_on(st); | |
561 } | |
562 | |
563 // print class | |
564 st->print(" - klass: "); | |
565 obj->klass()->print_value_on(st); | |
566 st->cr(); | |
567 } | |
568 | |
569 void Klass::oop_print_value_on(oop obj, outputStream* st) { | |
570 // print title | |
571 ResourceMark rm; // Cannot print in debug mode without this | |
572 st->print("%s", internal_name()); | |
573 obj->print_address_on(st); | |
574 } | |
575 | |
576 // Verification | |
577 | |
578 void Klass::oop_verify_on(oop obj, outputStream* st) { | |
579 guarantee(obj->is_oop(), "should be oop"); | |
580 guarantee(obj->klass()->is_perm(), "should be in permspace"); | |
581 guarantee(obj->klass()->is_klass(), "klass field is not a klass"); | |
582 } | |
583 | |
584 | |
585 void Klass::oop_verify_old_oop(oop obj, oop* p, bool allow_dirty) { | |
586 /* $$$ I think this functionality should be handled by verification of | |
587 RememberedSet::verify_old_oop(obj, p, allow_dirty, false); | |
588 the card table. */ | |
589 } | |
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590 void Klass::oop_verify_old_oop(oop obj, narrowOop* p, bool allow_dirty) { } |
0 | 591 |
592 #ifndef PRODUCT | |
593 | |
594 void Klass::verify_vtable_index(int i) { | |
595 assert(oop_is_instance() || oop_is_array(), "only instanceKlass and arrayKlass have vtables"); | |
596 if (oop_is_instance()) { | |
597 assert(i>=0 && i<((instanceKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); | |
598 } else { | |
599 assert(i>=0 && i<((arrayKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); | |
600 } | |
601 } | |
602 | |
603 #endif |