Mercurial > hg > truffle
annotate src/share/vm/oops/klass.cpp @ 4970:33df1aeaebbf
Merge with http://hg.openjdk.java.net/hsx/hsx24/hotspot/
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Mon, 27 Feb 2012 13:10:13 +0100 |
| parents | be4ca325525a 34e2e90e7182 |
| children | 18a5539bf19b |
| rev | line source |
|---|---|
| 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); | |
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147 kl->set_super_check_offset(in_bytes(primary_supers_offset())); |
| 0 | 148 } |
| 149 | |
| 150 kl->set_java_mirror(NULL); | |
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151 kl->set_graal_mirror(NULL); |
| 0 | 152 kl->set_modifier_flags(0); |
| 153 kl->set_layout_helper(Klass::_lh_neutral_value); | |
| 154 kl->set_name(NULL); | |
| 155 AccessFlags af; | |
| 156 af.set_flags(0); | |
| 157 kl->set_access_flags(af); | |
| 158 kl->set_subklass(NULL); | |
| 159 kl->set_next_sibling(NULL); | |
| 160 kl->set_alloc_count(0); | |
| 161 kl->set_alloc_size(0); | |
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162 TRACE_SET_KLASS_TRACE_ID(kl, 0); |
| 0 | 163 |
| 164 kl->set_prototype_header(markOopDesc::prototype()); | |
| 165 kl->set_biased_lock_revocation_count(0); | |
| 166 kl->set_last_biased_lock_bulk_revocation_time(0); | |
| 167 | |
| 168 return k; | |
| 169 } | |
| 170 | |
| 171 KlassHandle Klass::base_create_klass(KlassHandle& klass, int size, | |
| 172 const Klass_vtbl& vtbl, TRAPS) { | |
| 173 klassOop ek = base_create_klass_oop(klass, size, vtbl, THREAD); | |
| 174 return KlassHandle(THREAD, ek); | |
| 175 } | |
| 176 | |
| 177 void Klass_vtbl::post_new_init_klass(KlassHandle& klass, | |
| 178 klassOop new_klass, | |
| 179 int size) const { | |
| 180 assert(!new_klass->klass_part()->null_vtbl(), "Not a complete klass"); | |
| 181 CollectedHeap::post_allocation_install_obj_klass(klass, new_klass, size); | |
| 182 } | |
| 183 | |
| 184 void* Klass_vtbl::operator new(size_t ignored, KlassHandle& klass, | |
| 185 int size, TRAPS) { | |
| 186 // The vtable pointer is installed during the execution of | |
| 187 // constructors in the call to permanent_obj_allocate(). Delay | |
| 188 // the installation of the klass pointer into the new klass "k" | |
| 189 // until after the vtable pointer has been installed (i.e., until | |
| 190 // after the return of permanent_obj_allocate(). | |
| 191 klassOop k = | |
| 192 (klassOop) CollectedHeap::permanent_obj_allocate_no_klass_install(klass, | |
| 193 size, CHECK_NULL); | |
| 194 return k->klass_part(); | |
| 195 } | |
| 196 | |
| 197 jint Klass::array_layout_helper(BasicType etype) { | |
| 198 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype"); | |
| 199 // Note that T_ARRAY is not allowed here. | |
| 200 int hsize = arrayOopDesc::base_offset_in_bytes(etype); | |
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201 int esize = type2aelembytes(etype); |
| 0 | 202 bool isobj = (etype == T_OBJECT); |
| 203 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value; | |
| 204 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize)); | |
| 205 | |
| 206 assert(lh < (int)_lh_neutral_value, "must look like an array layout"); | |
| 207 assert(layout_helper_is_javaArray(lh), "correct kind"); | |
| 208 assert(layout_helper_is_objArray(lh) == isobj, "correct kind"); | |
| 209 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind"); | |
| 210 assert(layout_helper_header_size(lh) == hsize, "correct decode"); | |
| 211 assert(layout_helper_element_type(lh) == etype, "correct decode"); | |
| 212 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode"); | |
| 213 | |
| 214 return lh; | |
| 215 } | |
| 216 | |
| 217 bool Klass::can_be_primary_super_slow() const { | |
| 218 if (super() == NULL) | |
| 219 return true; | |
| 220 else if (super()->klass_part()->super_depth() >= primary_super_limit()-1) | |
| 221 return false; | |
| 222 else | |
| 223 return true; | |
| 224 } | |
| 225 | |
| 226 void Klass::initialize_supers(klassOop k, TRAPS) { | |
| 227 if (FastSuperclassLimit == 0) { | |
| 228 // None of the other machinery matters. | |
| 229 set_super(k); | |
| 230 return; | |
| 231 } | |
| 232 if (k == NULL) { | |
| 233 set_super(NULL); | |
| 234 oop_store_without_check((oop*) &_primary_supers[0], (oop) this->as_klassOop()); | |
| 235 assert(super_depth() == 0, "Object must already be initialized properly"); | |
| 1142 | 236 } else if (k != super() || k == SystemDictionary::Object_klass()) { |
| 237 assert(super() == NULL || super() == SystemDictionary::Object_klass(), | |
| 0 | 238 "initialize this only once to a non-trivial value"); |
| 239 set_super(k); | |
| 240 Klass* sup = k->klass_part(); | |
| 241 int sup_depth = sup->super_depth(); | |
| 242 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit()); | |
| 243 if (!can_be_primary_super_slow()) | |
| 244 my_depth = primary_super_limit(); | |
| 245 for (juint i = 0; i < my_depth; i++) { | |
| 246 oop_store_without_check((oop*) &_primary_supers[i], (oop) sup->_primary_supers[i]); | |
| 247 } | |
| 248 klassOop *super_check_cell; | |
| 249 if (my_depth < primary_super_limit()) { | |
| 250 oop_store_without_check((oop*) &_primary_supers[my_depth], (oop) this->as_klassOop()); | |
| 251 super_check_cell = &_primary_supers[my_depth]; | |
| 252 } else { | |
| 253 // Overflow of the primary_supers array forces me to be secondary. | |
| 254 super_check_cell = &_secondary_super_cache; | |
| 255 } | |
| 256 set_super_check_offset((address)super_check_cell - (address) this->as_klassOop()); | |
| 257 | |
| 258 #ifdef ASSERT | |
| 259 { | |
| 260 juint j = super_depth(); | |
| 261 assert(j == my_depth, "computed accessor gets right answer"); | |
| 262 klassOop t = as_klassOop(); | |
| 263 while (!Klass::cast(t)->can_be_primary_super()) { | |
| 264 t = Klass::cast(t)->super(); | |
| 265 j = Klass::cast(t)->super_depth(); | |
| 266 } | |
| 267 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) { | |
| 268 assert(primary_super_of_depth(j1) == NULL, "super list padding"); | |
| 269 } | |
| 270 while (t != NULL) { | |
| 271 assert(primary_super_of_depth(j) == t, "super list initialization"); | |
| 272 t = Klass::cast(t)->super(); | |
| 273 --j; | |
| 274 } | |
| 275 assert(j == (juint)-1, "correct depth count"); | |
| 276 } | |
| 277 #endif | |
| 278 } | |
| 279 | |
| 280 if (secondary_supers() == NULL) { | |
| 281 KlassHandle this_kh (THREAD, this); | |
| 282 | |
| 283 // Now compute the list of secondary supertypes. | |
| 284 // Secondaries can occasionally be on the super chain, | |
| 285 // if the inline "_primary_supers" array overflows. | |
| 286 int extras = 0; | |
| 287 klassOop p; | |
| 288 for (p = super(); !(p == NULL || p->klass_part()->can_be_primary_super()); p = p->klass_part()->super()) { | |
| 289 ++extras; | |
| 290 } | |
| 291 | |
| 292 // Compute the "real" non-extra secondaries. | |
| 293 objArrayOop secondary_oops = compute_secondary_supers(extras, CHECK); | |
| 294 objArrayHandle secondaries (THREAD, secondary_oops); | |
| 295 | |
| 296 // Store the extra secondaries in the first array positions: | |
| 297 int fillp = extras; | |
| 298 for (p = this_kh->super(); !(p == NULL || p->klass_part()->can_be_primary_super()); p = p->klass_part()->super()) { | |
| 299 int i; // Scan for overflow primaries being duplicates of 2nd'arys | |
| 300 | |
| 301 // This happens frequently for very deeply nested arrays: the | |
| 302 // primary superclass chain overflows into the secondary. The | |
| 303 // secondary list contains the element_klass's secondaries with | |
| 304 // an extra array dimension added. If the element_klass's | |
| 305 // secondary list already contains some primary overflows, they | |
| 306 // (with the extra level of array-ness) will collide with the | |
| 307 // normal primary superclass overflows. | |
| 308 for( i = extras; i < secondaries->length(); i++ ) | |
| 309 if( secondaries->obj_at(i) == p ) | |
| 310 break; | |
| 311 if( i < secondaries->length() ) | |
| 312 continue; // It's a dup, don't put it in | |
| 313 secondaries->obj_at_put(--fillp, p); | |
| 314 } | |
| 315 // See if we had some dup's, so the array has holes in it. | |
| 316 if( fillp > 0 ) { | |
| 317 // Pack the array. Drop the old secondaries array on the floor | |
| 318 // and let GC reclaim it. | |
| 319 objArrayOop s2 = oopFactory::new_system_objArray(secondaries->length() - fillp, CHECK); | |
| 320 for( int i = 0; i < s2->length(); i++ ) | |
| 321 s2->obj_at_put( i, secondaries->obj_at(i+fillp) ); | |
| 322 secondaries = objArrayHandle(THREAD, s2); | |
| 323 } | |
| 324 | |
| 325 #ifdef ASSERT | |
| 326 if (secondaries() != Universe::the_array_interfaces_array()) { | |
| 327 // We must not copy any NULL placeholders left over from bootstrap. | |
| 328 for (int j = 0; j < secondaries->length(); j++) { | |
| 329 assert(secondaries->obj_at(j) != NULL, "correct bootstrapping order"); | |
| 330 } | |
| 331 } | |
| 332 #endif | |
| 333 | |
| 334 this_kh->set_secondary_supers(secondaries()); | |
| 335 } | |
| 336 } | |
| 337 | |
| 338 objArrayOop Klass::compute_secondary_supers(int num_extra_slots, TRAPS) { | |
| 339 assert(num_extra_slots == 0, "override for complex klasses"); | |
| 340 return Universe::the_empty_system_obj_array(); | |
| 341 } | |
| 342 | |
| 343 | |
| 344 Klass* Klass::subklass() const { | |
| 345 return _subklass == NULL ? NULL : Klass::cast(_subklass); | |
| 346 } | |
| 347 | |
| 348 instanceKlass* Klass::superklass() const { | |
| 349 assert(super() == NULL || super()->klass_part()->oop_is_instance(), "must be instance klass"); | |
| 350 return _super == NULL ? NULL : instanceKlass::cast(_super); | |
| 351 } | |
| 352 | |
| 353 Klass* Klass::next_sibling() const { | |
| 354 return _next_sibling == NULL ? NULL : Klass::cast(_next_sibling); | |
| 355 } | |
| 356 | |
| 357 void Klass::set_subklass(klassOop s) { | |
| 358 assert(s != as_klassOop(), "sanity check"); | |
| 359 oop_store_without_check((oop*)&_subklass, s); | |
| 360 } | |
| 361 | |
| 362 void Klass::set_next_sibling(klassOop s) { | |
| 363 assert(s != as_klassOop(), "sanity check"); | |
| 364 oop_store_without_check((oop*)&_next_sibling, s); | |
| 365 } | |
| 366 | |
| 367 void Klass::append_to_sibling_list() { | |
| 368 debug_only(if (!SharedSkipVerify) as_klassOop()->verify();) | |
| 369 // add ourselves to superklass' subklass list | |
| 370 instanceKlass* super = superklass(); | |
| 371 if (super == NULL) return; // special case: class Object | |
| 372 assert(SharedSkipVerify || | |
| 373 (!super->is_interface() // interfaces cannot be supers | |
| 374 && (super->superklass() == NULL || !is_interface())), | |
| 375 "an interface can only be a subklass of Object"); | |
| 376 klassOop prev_first_subklass = super->subklass_oop(); | |
| 377 if (prev_first_subklass != NULL) { | |
| 378 // set our sibling to be the superklass' previous first subklass | |
| 379 set_next_sibling(prev_first_subklass); | |
| 380 } | |
| 381 // make ourselves the superklass' first subklass | |
| 382 super->set_subklass(as_klassOop()); | |
| 383 debug_only(if (!SharedSkipVerify) as_klassOop()->verify();) | |
| 384 } | |
| 385 | |
| 386 void Klass::remove_from_sibling_list() { | |
| 387 // remove receiver from sibling list | |
| 388 instanceKlass* super = superklass(); | |
| 1142 | 389 assert(super != NULL || as_klassOop() == SystemDictionary::Object_klass(), "should have super"); |
| 0 | 390 if (super == NULL) return; // special case: class Object |
| 391 if (super->subklass() == this) { | |
| 392 // first subklass | |
| 393 super->set_subklass(_next_sibling); | |
| 394 } else { | |
| 395 Klass* sib = super->subklass(); | |
| 396 while (sib->next_sibling() != this) { | |
| 397 sib = sib->next_sibling(); | |
| 398 }; | |
| 399 sib->set_next_sibling(_next_sibling); | |
| 400 } | |
| 401 } | |
| 402 | |
| 403 void Klass::follow_weak_klass_links( BoolObjectClosure* is_alive, OopClosure* keep_alive) { | |
| 404 // This klass is alive but the subklass and siblings are not followed/updated. | |
| 405 // We update the subklass link and the subklass' sibling links here. | |
| 406 // Our own sibling link will be updated by our superclass (which must be alive | |
| 407 // since we are). | |
| 408 assert(is_alive->do_object_b(as_klassOop()), "just checking, this should be live"); | |
| 409 if (ClassUnloading) { | |
| 410 klassOop sub = subklass_oop(); | |
| 411 if (sub != NULL && !is_alive->do_object_b(sub)) { | |
| 412 // first subklass not alive, find first one alive | |
| 413 do { | |
| 414 #ifndef PRODUCT | |
| 415 if (TraceClassUnloading && WizardMode) { | |
| 416 ResourceMark rm; | |
| 417 tty->print_cr("[Unlinking class (subclass) %s]", sub->klass_part()->external_name()); | |
| 418 } | |
| 419 #endif | |
| 420 sub = sub->klass_part()->next_sibling_oop(); | |
| 421 } while (sub != NULL && !is_alive->do_object_b(sub)); | |
| 422 set_subklass(sub); | |
| 423 } | |
| 424 // now update the subklass' sibling list | |
| 425 while (sub != NULL) { | |
| 426 klassOop next = sub->klass_part()->next_sibling_oop(); | |
| 427 if (next != NULL && !is_alive->do_object_b(next)) { | |
| 428 // first sibling not alive, find first one alive | |
| 429 do { | |
| 430 #ifndef PRODUCT | |
| 431 if (TraceClassUnloading && WizardMode) { | |
| 432 ResourceMark rm; | |
| 433 tty->print_cr("[Unlinking class (sibling) %s]", next->klass_part()->external_name()); | |
| 434 } | |
| 435 #endif | |
| 436 next = next->klass_part()->next_sibling_oop(); | |
| 437 } while (next != NULL && !is_alive->do_object_b(next)); | |
| 438 sub->klass_part()->set_next_sibling(next); | |
| 439 } | |
| 440 sub = next; | |
| 441 } | |
| 442 } else { | |
| 443 // Always follow subklass and sibling link. This will prevent any klasses from | |
| 444 // being unloaded (all classes are transitively linked from java.lang.Object). | |
| 445 keep_alive->do_oop(adr_subklass()); | |
| 446 keep_alive->do_oop(adr_next_sibling()); | |
| 447 } | |
| 448 } | |
| 449 | |
| 450 | |
| 451 void Klass::remove_unshareable_info() { | |
| 452 if (oop_is_instance()) { | |
| 453 instanceKlass* ik = (instanceKlass*)this; | |
| 454 if (ik->is_linked()) { | |
| 455 ik->unlink_class(); | |
| 456 } | |
| 457 } | |
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458 // Clear the Java vtable if the oop has one. |
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459 // The vtable isn't shareable because it's in the wrong order wrt the methods |
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460 // once the method names get moved and resorted. |
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461 klassVtable* vt = vtable(); |
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462 if (vt != NULL) { |
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463 assert(oop_is_instance() || oop_is_array(), "nothing else has vtable"); |
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464 vt->clear_vtable(); |
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465 } |
| 0 | 466 set_subklass(NULL); |
| 467 set_next_sibling(NULL); | |
| 468 } | |
| 469 | |
| 470 | |
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471 void Klass::shared_symbols_iterate(SymbolClosure* closure) { |
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472 closure->do_symbol(&_name); |
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473 } |
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474 |
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475 |
| 0 | 476 klassOop Klass::array_klass_or_null(int rank) { |
| 477 EXCEPTION_MARK; | |
| 478 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
| 479 // (In anycase, the execption mark will fail if it do so) | |
| 480 return array_klass_impl(true, rank, THREAD); | |
| 481 } | |
| 482 | |
| 483 | |
| 484 klassOop Klass::array_klass_or_null() { | |
| 485 EXCEPTION_MARK; | |
| 486 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
| 487 // (In anycase, the execption mark will fail if it do so) | |
| 488 return array_klass_impl(true, THREAD); | |
| 489 } | |
| 490 | |
| 491 | |
| 492 klassOop Klass::array_klass_impl(bool or_null, int rank, TRAPS) { | |
| 493 fatal("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass"); | |
| 494 return NULL; | |
| 495 } | |
| 496 | |
| 497 | |
| 498 klassOop Klass::array_klass_impl(bool or_null, TRAPS) { | |
| 499 fatal("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass"); | |
| 500 return NULL; | |
| 501 } | |
| 502 | |
| 503 | |
| 504 void Klass::with_array_klasses_do(void f(klassOop k)) { | |
| 505 f(as_klassOop()); | |
| 506 } | |
| 507 | |
| 508 | |
| 509 const char* Klass::external_name() const { | |
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510 if (oop_is_instance()) { |
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511 instanceKlass* ik = (instanceKlass*) this; |
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512 if (ik->is_anonymous()) { |
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513 assert(EnableInvokeDynamic, ""); |
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514 intptr_t hash = ik->java_mirror()->identity_hash(); |
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515 char hash_buf[40]; |
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516 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash); |
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517 size_t hash_len = strlen(hash_buf); |
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518 |
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519 size_t result_len = name()->utf8_length(); |
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520 char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1); |
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521 name()->as_klass_external_name(result, (int) result_len + 1); |
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522 assert(strlen(result) == result_len, ""); |
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523 strcpy(result + result_len, hash_buf); |
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524 assert(strlen(result) == result_len + hash_len, ""); |
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525 return result; |
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526 } |
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527 } |
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528 if (name() == NULL) return "<unknown>"; |
| 0 | 529 return name()->as_klass_external_name(); |
| 530 } | |
| 531 | |
| 532 | |
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533 const char* Klass::signature_name() const { |
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534 if (name() == NULL) return "<unknown>"; |
| 0 | 535 return name()->as_C_string(); |
| 536 } | |
| 537 | |
| 538 // Unless overridden, modifier_flags is 0. | |
| 539 jint Klass::compute_modifier_flags(TRAPS) const { | |
| 540 return 0; | |
| 541 } | |
| 542 | |
| 543 int Klass::atomic_incr_biased_lock_revocation_count() { | |
| 544 return (int) Atomic::add(1, &_biased_lock_revocation_count); | |
| 545 } | |
| 546 | |
| 547 // Unless overridden, jvmti_class_status has no flags set. | |
| 548 jint Klass::jvmti_class_status() const { | |
| 549 return 0; | |
| 550 } | |
| 551 | |
| 552 // Printing | |
| 553 | |
| 554 void Klass::oop_print_on(oop obj, outputStream* st) { | |
| 555 ResourceMark rm; | |
| 556 // print title | |
| 557 st->print_cr("%s ", internal_name()); | |
| 558 obj->print_address_on(st); | |
| 559 | |
| 560 if (WizardMode) { | |
| 561 // print header | |
| 562 obj->mark()->print_on(st); | |
| 563 } | |
| 564 | |
| 565 // print class | |
| 566 st->print(" - klass: "); | |
| 567 obj->klass()->print_value_on(st); | |
| 568 st->cr(); | |
| 569 } | |
| 570 | |
| 571 void Klass::oop_print_value_on(oop obj, outputStream* st) { | |
| 572 // print title | |
| 573 ResourceMark rm; // Cannot print in debug mode without this | |
| 574 st->print("%s", internal_name()); | |
| 575 obj->print_address_on(st); | |
| 576 } | |
| 577 | |
| 578 // Verification | |
| 579 | |
| 580 void Klass::oop_verify_on(oop obj, outputStream* st) { | |
| 581 guarantee(obj->is_oop(), "should be oop"); | |
| 582 guarantee(obj->klass()->is_perm(), "should be in permspace"); | |
| 583 guarantee(obj->klass()->is_klass(), "klass field is not a klass"); | |
| 584 } | |
| 585 | |
| 586 | |
| 587 void Klass::oop_verify_old_oop(oop obj, oop* p, bool allow_dirty) { | |
| 588 /* $$$ I think this functionality should be handled by verification of | |
| 589 RememberedSet::verify_old_oop(obj, p, allow_dirty, false); | |
| 590 the card table. */ | |
| 591 } | |
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592 void Klass::oop_verify_old_oop(oop obj, narrowOop* p, bool allow_dirty) { } |
| 0 | 593 |
| 594 #ifndef PRODUCT | |
| 595 | |
| 596 void Klass::verify_vtable_index(int i) { | |
| 597 assert(oop_is_instance() || oop_is_array(), "only instanceKlass and arrayKlass have vtables"); | |
| 598 if (oop_is_instance()) { | |
| 599 assert(i>=0 && i<((instanceKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); | |
| 600 } else { | |
| 601 assert(i>=0 && i<((arrayKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); | |
| 602 } | |
| 603 } | |
| 604 | |
| 605 #endif |