Mercurial > hg > graal-compiler
annotate src/share/vm/oops/klass.cpp @ 20262:76b588255908
8035746: Add missing Klass::oop_is_instanceClassLoader() function
Reviewed-by: mgerdin, coleenp
author | stefank |
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date | Thu, 27 Feb 2014 10:36:50 +0100 |
parents | ce8f6bb717c9 |
children | 2c6ef90f030a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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" |
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26 #include "classfile/javaClasses.hpp" |
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27 #include "classfile/dictionary.hpp" |
1972 | 28 #include "classfile/systemDictionary.hpp" |
29 #include "classfile/vmSymbols.hpp" | |
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30 #include "gc_implementation/shared/markSweep.inline.hpp" |
1972 | 31 #include "gc_interface/collectedHeap.inline.hpp" |
7956 | 32 #include "memory/heapInspection.hpp" |
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33 #include "memory/metadataFactory.hpp" |
1972 | 34 #include "memory/oopFactory.hpp" |
35 #include "memory/resourceArea.hpp" | |
36 #include "oops/instanceKlass.hpp" | |
37 #include "oops/klass.inline.hpp" | |
38 #include "oops/oop.inline2.hpp" | |
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39 #include "runtime/atomic.inline.hpp" |
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40 #include "runtime/orderAccess.inline.hpp" |
10405 | 41 #include "trace/traceMacros.hpp" |
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42 #include "utilities/stack.hpp" |
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43 #include "utilities/macros.hpp" |
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44 #if INCLUDE_ALL_GCS |
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45 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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46 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
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47 #include "gc_implementation/parallelScavenge/psScavenge.hpp" |
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48 #endif // INCLUDE_ALL_GCS |
0 | 49 |
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50 void Klass::set_name(Symbol* n) { |
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51 _name = n; |
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52 if (_name != NULL) _name->increment_refcount(); |
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53 } |
0 | 54 |
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55 bool Klass::is_subclass_of(const Klass* k) const { |
0 | 56 // Run up the super chain and check |
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57 if (this == k) return true; |
0 | 58 |
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59 Klass* t = const_cast<Klass*>(this)->super(); |
0 | 60 |
61 while (t != NULL) { | |
62 if (t == k) return true; | |
6983 | 63 t = t->super(); |
0 | 64 } |
65 return false; | |
66 } | |
67 | |
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68 bool Klass::search_secondary_supers(Klass* k) const { |
0 | 69 // Put some extra logic here out-of-line, before the search proper. |
70 // This cuts down the size of the inline method. | |
71 | |
72 // This is necessary, since I am never in my own secondary_super list. | |
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73 if (this == k) |
0 | 74 return true; |
75 // Scan the array-of-objects for a match | |
76 int cnt = secondary_supers()->length(); | |
77 for (int i = 0; i < cnt; i++) { | |
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78 if (secondary_supers()->at(i) == k) { |
0 | 79 ((Klass*)this)->set_secondary_super_cache(k); |
80 return true; | |
81 } | |
82 } | |
83 return false; | |
84 } | |
85 | |
86 // Return self, except for abstract classes with exactly 1 | |
87 // implementor. Then return the 1 concrete implementation. | |
88 Klass *Klass::up_cast_abstract() { | |
89 Klass *r = this; | |
90 while( r->is_abstract() ) { // Receiver is abstract? | |
91 Klass *s = r->subklass(); // Check for exactly 1 subklass | |
92 if( !s || s->next_sibling() ) // Oops; wrong count; give up | |
93 return this; // Return 'this' as a no-progress flag | |
94 r = s; // Loop till find concrete class | |
95 } | |
96 return r; // Return the 1 concrete class | |
97 } | |
98 | |
605 | 99 // Find LCA in class hierarchy |
0 | 100 Klass *Klass::LCA( Klass *k2 ) { |
101 Klass *k1 = this; | |
102 while( 1 ) { | |
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103 if( k1->is_subtype_of(k2) ) return k2; |
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104 if( k2->is_subtype_of(k1) ) return k1; |
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105 k1 = k1->super(); |
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106 k2 = k2->super(); |
0 | 107 } |
108 } | |
109 | |
110 | |
111 void Klass::check_valid_for_instantiation(bool throwError, TRAPS) { | |
112 ResourceMark rm(THREAD); | |
113 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
114 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
115 } | |
116 | |
117 | |
118 void Klass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) { | |
119 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
120 } | |
121 | |
122 | |
123 void Klass::initialize(TRAPS) { | |
124 ShouldNotReachHere(); | |
125 } | |
126 | |
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127 bool Klass::compute_is_subtype_of(Klass* k) { |
0 | 128 assert(k->is_klass(), "argument must be a class"); |
129 return is_subclass_of(k); | |
130 } | |
131 | |
132 | |
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133 Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const { |
0 | 134 #ifdef ASSERT |
135 tty->print_cr("Error: uncached_lookup_method called on a klass oop." | |
136 " Likely error: reflection method does not correctly" | |
137 " wrap return value in a mirror object."); | |
138 #endif | |
139 ShouldNotReachHere(); | |
140 return NULL; | |
141 } | |
142 | |
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143 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() { |
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144 return Metaspace::allocate(loader_data, word_size, /*read_only*/false, |
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145 MetaspaceObj::ClassType, CHECK_NULL); |
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146 } |
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147 |
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148 Klass::Klass() { |
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149 Klass* k = this; |
0 | 150 |
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151 // Preinitialize supertype information. |
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152 // A later call to initialize_supers() may update these settings: |
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153 set_super(NULL); |
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154 for (juint i = 0; i < Klass::primary_super_limit(); i++) { |
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155 _primary_supers[i] = NULL; |
0 | 156 } |
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157 set_secondary_supers(NULL); |
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158 set_secondary_super_cache(NULL); |
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159 _primary_supers[0] = k; |
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160 set_super_check_offset(in_bytes(primary_supers_offset())); |
0 | 161 |
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162 set_java_mirror(NULL); |
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163 set_modifier_flags(0); |
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164 set_layout_helper(Klass::_lh_neutral_value); |
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165 set_name(NULL); |
0 | 166 AccessFlags af; |
167 af.set_flags(0); | |
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168 set_access_flags(af); |
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169 set_subklass(NULL); |
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170 set_next_sibling(NULL); |
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171 set_next_link(NULL); |
10405 | 172 TRACE_INIT_ID(this); |
0 | 173 |
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174 set_prototype_header(markOopDesc::prototype()); |
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175 set_biased_lock_revocation_count(0); |
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176 set_last_biased_lock_bulk_revocation_time(0); |
0 | 177 |
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178 // The klass doesn't have any references at this point. |
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179 clear_modified_oops(); |
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180 clear_accumulated_modified_oops(); |
0 | 181 } |
182 | |
183 jint Klass::array_layout_helper(BasicType etype) { | |
184 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype"); | |
185 // Note that T_ARRAY is not allowed here. | |
186 int hsize = arrayOopDesc::base_offset_in_bytes(etype); | |
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187 int esize = type2aelembytes(etype); |
0 | 188 bool isobj = (etype == T_OBJECT); |
189 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value; | |
190 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize)); | |
191 | |
192 assert(lh < (int)_lh_neutral_value, "must look like an array layout"); | |
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193 assert(layout_helper_is_array(lh), "correct kind"); |
0 | 194 assert(layout_helper_is_objArray(lh) == isobj, "correct kind"); |
195 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind"); | |
196 assert(layout_helper_header_size(lh) == hsize, "correct decode"); | |
197 assert(layout_helper_element_type(lh) == etype, "correct decode"); | |
198 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode"); | |
199 | |
200 return lh; | |
201 } | |
202 | |
203 bool Klass::can_be_primary_super_slow() const { | |
204 if (super() == NULL) | |
205 return true; | |
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206 else if (super()->super_depth() >= primary_super_limit()-1) |
0 | 207 return false; |
208 else | |
209 return true; | |
210 } | |
211 | |
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212 void Klass::initialize_supers(Klass* k, TRAPS) { |
0 | 213 if (FastSuperclassLimit == 0) { |
214 // None of the other machinery matters. | |
215 set_super(k); | |
216 return; | |
217 } | |
218 if (k == NULL) { | |
219 set_super(NULL); | |
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220 _primary_supers[0] = this; |
0 | 221 assert(super_depth() == 0, "Object must already be initialized properly"); |
1142 | 222 } else if (k != super() || k == SystemDictionary::Object_klass()) { |
223 assert(super() == NULL || super() == SystemDictionary::Object_klass(), | |
0 | 224 "initialize this only once to a non-trivial value"); |
225 set_super(k); | |
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226 Klass* sup = k; |
0 | 227 int sup_depth = sup->super_depth(); |
228 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit()); | |
229 if (!can_be_primary_super_slow()) | |
230 my_depth = primary_super_limit(); | |
231 for (juint i = 0; i < my_depth; i++) { | |
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232 _primary_supers[i] = sup->_primary_supers[i]; |
0 | 233 } |
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234 Klass* *super_check_cell; |
0 | 235 if (my_depth < primary_super_limit()) { |
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236 _primary_supers[my_depth] = this; |
0 | 237 super_check_cell = &_primary_supers[my_depth]; |
238 } else { | |
239 // Overflow of the primary_supers array forces me to be secondary. | |
240 super_check_cell = &_secondary_super_cache; | |
241 } | |
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242 set_super_check_offset((address)super_check_cell - (address) this); |
0 | 243 |
244 #ifdef ASSERT | |
245 { | |
246 juint j = super_depth(); | |
247 assert(j == my_depth, "computed accessor gets right answer"); | |
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248 Klass* t = this; |
6983 | 249 while (!t->can_be_primary_super()) { |
250 t = t->super(); | |
251 j = t->super_depth(); | |
0 | 252 } |
253 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) { | |
254 assert(primary_super_of_depth(j1) == NULL, "super list padding"); | |
255 } | |
256 while (t != NULL) { | |
257 assert(primary_super_of_depth(j) == t, "super list initialization"); | |
6983 | 258 t = t->super(); |
0 | 259 --j; |
260 } | |
261 assert(j == (juint)-1, "correct depth count"); | |
262 } | |
263 #endif | |
264 } | |
265 | |
266 if (secondary_supers() == NULL) { | |
267 KlassHandle this_kh (THREAD, this); | |
268 | |
269 // Now compute the list of secondary supertypes. | |
270 // Secondaries can occasionally be on the super chain, | |
271 // if the inline "_primary_supers" array overflows. | |
272 int extras = 0; | |
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273 Klass* p; |
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274 for (p = super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 275 ++extras; |
276 } | |
277 | |
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278 ResourceMark rm(THREAD); // need to reclaim GrowableArrays allocated below |
0 | 279 |
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280 // Compute the "real" non-extra secondaries. |
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281 GrowableArray<Klass*>* secondaries = compute_secondary_supers(extras); |
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282 if (secondaries == NULL) { |
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283 // secondary_supers set by compute_secondary_supers |
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284 return; |
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285 } |
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286 |
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287 GrowableArray<Klass*>* primaries = new GrowableArray<Klass*>(extras); |
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288 |
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289 for (p = this_kh->super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 290 int i; // Scan for overflow primaries being duplicates of 2nd'arys |
291 | |
292 // This happens frequently for very deeply nested arrays: the | |
293 // primary superclass chain overflows into the secondary. The | |
294 // secondary list contains the element_klass's secondaries with | |
295 // an extra array dimension added. If the element_klass's | |
296 // secondary list already contains some primary overflows, they | |
297 // (with the extra level of array-ness) will collide with the | |
298 // normal primary superclass overflows. | |
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299 for( i = 0; i < secondaries->length(); i++ ) { |
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300 if( secondaries->at(i) == p ) |
0 | 301 break; |
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302 } |
0 | 303 if( i < secondaries->length() ) |
304 continue; // It's a dup, don't put it in | |
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305 primaries->push(p); |
0 | 306 } |
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307 // Combine the two arrays into a metadata object to pack the array. |
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308 // The primaries are added in the reverse order, then the secondaries. |
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309 int new_length = primaries->length() + secondaries->length(); |
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310 Array<Klass*>* s2 = MetadataFactory::new_array<Klass*>( |
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311 class_loader_data(), new_length, CHECK); |
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312 int fill_p = primaries->length(); |
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313 for (int j = 0; j < fill_p; j++) { |
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314 s2->at_put(j, primaries->pop()); // add primaries in reverse order. |
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315 } |
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316 for( int j = 0; j < secondaries->length(); j++ ) { |
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317 s2->at_put(j+fill_p, secondaries->at(j)); // add secondaries on the end. |
0 | 318 } |
319 | |
320 #ifdef ASSERT | |
321 // We must not copy any NULL placeholders left over from bootstrap. | |
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322 for (int j = 0; j < s2->length(); j++) { |
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323 assert(s2->at(j) != NULL, "correct bootstrapping order"); |
0 | 324 } |
325 #endif | |
326 | |
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327 this_kh->set_secondary_supers(s2); |
0 | 328 } |
329 } | |
330 | |
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331 GrowableArray<Klass*>* Klass::compute_secondary_supers(int num_extra_slots) { |
0 | 332 assert(num_extra_slots == 0, "override for complex klasses"); |
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333 set_secondary_supers(Universe::the_empty_klass_array()); |
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334 return NULL; |
0 | 335 } |
336 | |
337 | |
338 Klass* Klass::subklass() const { | |
6983 | 339 return _subklass == NULL ? NULL : _subklass; |
0 | 340 } |
341 | |
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342 InstanceKlass* Klass::superklass() const { |
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343 assert(super() == NULL || super()->oop_is_instance(), "must be instance klass"); |
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344 return _super == NULL ? NULL : InstanceKlass::cast(_super); |
0 | 345 } |
346 | |
347 Klass* Klass::next_sibling() const { | |
6983 | 348 return _next_sibling == NULL ? NULL : _next_sibling; |
0 | 349 } |
350 | |
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351 void Klass::set_subklass(Klass* s) { |
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352 assert(s != this, "sanity check"); |
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353 _subklass = s; |
0 | 354 } |
355 | |
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356 void Klass::set_next_sibling(Klass* s) { |
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357 assert(s != this, "sanity check"); |
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358 _next_sibling = s; |
0 | 359 } |
360 | |
361 void Klass::append_to_sibling_list() { | |
6867 | 362 debug_only(verify();) |
0 | 363 // add ourselves to superklass' subklass list |
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364 InstanceKlass* super = superklass(); |
0 | 365 if (super == NULL) return; // special case: class Object |
6867 | 366 assert((!super->is_interface() // interfaces cannot be supers |
0 | 367 && (super->superklass() == NULL || !is_interface())), |
368 "an interface can only be a subklass of Object"); | |
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369 Klass* prev_first_subklass = super->subklass_oop(); |
0 | 370 if (prev_first_subklass != NULL) { |
371 // set our sibling to be the superklass' previous first subklass | |
372 set_next_sibling(prev_first_subklass); | |
373 } | |
374 // make ourselves the superklass' first subklass | |
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375 super->set_subklass(this); |
6867 | 376 debug_only(verify();) |
0 | 377 } |
378 | |
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379 bool Klass::is_loader_alive(BoolObjectClosure* is_alive) { |
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380 #ifdef ASSERT |
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381 // The class is alive iff the class loader is alive. |
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382 oop loader = class_loader(); |
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383 bool loader_alive = (loader == NULL) || is_alive->do_object_b(loader); |
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384 #endif // ASSERT |
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385 |
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386 // The class is alive if it's mirror is alive (which should be marked if the |
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387 // loader is alive) unless it's an anoymous class. |
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388 bool mirror_alive = is_alive->do_object_b(java_mirror()); |
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389 assert(!mirror_alive || loader_alive, "loader must be alive if the mirror is" |
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390 " but not the other way around with anonymous classes"); |
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391 return mirror_alive; |
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392 } |
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393 |
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394 void Klass::clean_weak_klass_links(BoolObjectClosure* is_alive) { |
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395 if (!ClassUnloading) { |
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396 return; |
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397 } |
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398 |
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399 Klass* root = SystemDictionary::Object_klass(); |
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400 Stack<Klass*, mtGC> stack; |
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401 |
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402 stack.push(root); |
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403 while (!stack.is_empty()) { |
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404 Klass* current = stack.pop(); |
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405 |
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406 assert(current->is_loader_alive(is_alive), "just checking, this should be live"); |
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407 |
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408 // Find and set the first alive subklass |
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409 Klass* sub = current->subklass_oop(); |
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410 while (sub != NULL && !sub->is_loader_alive(is_alive)) { |
0 | 411 #ifndef PRODUCT |
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412 if (TraceClassUnloading && WizardMode) { |
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413 ResourceMark rm; |
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414 tty->print_cr("[Unlinking class (subclass) %s]", sub->external_name()); |
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415 } |
0 | 416 #endif |
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417 sub = sub->next_sibling_oop(); |
0 | 418 } |
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419 current->set_subklass(sub); |
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420 if (sub != NULL) { |
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421 stack.push(sub); |
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422 } |
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423 |
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424 // Find and set the first alive sibling |
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425 Klass* sibling = current->next_sibling_oop(); |
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426 while (sibling != NULL && !sibling->is_loader_alive(is_alive)) { |
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427 if (TraceClassUnloading && WizardMode) { |
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428 ResourceMark rm; |
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429 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name()); |
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430 } |
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431 sibling = sibling->next_sibling_oop(); |
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432 } |
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433 current->set_next_sibling(sibling); |
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434 if (sibling != NULL) { |
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435 stack.push(sibling); |
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436 } |
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437 |
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438 // Clean the implementors list and method data. |
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439 if (current->oop_is_instance()) { |
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440 InstanceKlass* ik = InstanceKlass::cast(current); |
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441 ik->clean_implementors_list(is_alive); |
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442 ik->clean_method_data(is_alive); |
0 | 443 } |
444 } | |
445 } | |
446 | |
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447 void Klass::klass_update_barrier_set(oop v) { |
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448 record_modified_oops(); |
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449 } |
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450 |
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451 void Klass::klass_update_barrier_set_pre(void* p, oop v) { |
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452 // This barrier used by G1, where it's used remember the old oop values, |
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453 // so that we don't forget any objects that were live at the snapshot at |
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454 // the beginning. This function is only used when we write oops into |
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455 // Klasses. Since the Klasses are used as roots in G1, we don't have to |
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456 // do anything here. |
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457 } |
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458 |
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459 void Klass::klass_oop_store(oop* p, oop v) { |
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460 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
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461 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
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462 |
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463 // do the store |
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464 if (always_do_update_barrier) { |
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465 klass_oop_store((volatile oop*)p, v); |
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466 } else { |
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467 klass_update_barrier_set_pre((void*)p, v); |
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468 *p = v; |
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469 klass_update_barrier_set(v); |
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470 } |
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471 } |
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472 |
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473 void Klass::klass_oop_store(volatile oop* p, oop v) { |
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474 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
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475 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
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476 |
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477 klass_update_barrier_set_pre((void*)p, v); |
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478 OrderAccess::release_store_ptr(p, v); |
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479 klass_update_barrier_set(v); |
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480 } |
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481 |
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482 void Klass::oops_do(OopClosure* cl) { |
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483 cl->do_oop(&_java_mirror); |
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484 } |
0 | 485 |
486 void Klass::remove_unshareable_info() { | |
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487 assert (DumpSharedSpaces, "only called for DumpSharedSpaces"); |
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488 |
0 | 489 set_subklass(NULL); |
490 set_next_sibling(NULL); | |
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491 // Clear the java mirror |
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492 set_java_mirror(NULL); |
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493 set_next_link(NULL); |
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494 |
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495 // Null out class_loader_data because we don't share that yet. |
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496 set_class_loader_data(NULL); |
0 | 497 } |
498 | |
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499 void Klass::restore_unshareable_info(TRAPS) { |
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500 TRACE_INIT_ID(this); |
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501 // If an exception happened during CDS restore, some of these fields may already be |
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502 // set. We leave the class on the CLD list, even if incomplete so that we don't |
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503 // modify the CLD list outside a safepoint. |
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504 if (class_loader_data() == NULL) { |
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505 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
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506 // Restore class_loader_data to the null class loader data |
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507 set_class_loader_data(loader_data); |
0 | 508 |
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509 // Add to null class loader list first before creating the mirror |
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510 // (same order as class file parsing) |
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511 loader_data->add_class(this); |
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512 } |
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513 |
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514 // Recreate the class mirror. The protection_domain is always null for |
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515 // boot loader, for now. |
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516 // Only recreate it if not present. A previous attempt to restore may have |
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517 // gotten an OOM later but keep the mirror if it was created. |
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518 if (java_mirror() == NULL) { |
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519 java_lang_Class::create_mirror(this, Handle(NULL), CHECK); |
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520 } |
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521 } |
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522 |
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523 Klass* Klass::array_klass_or_null(int rank) { |
0 | 524 EXCEPTION_MARK; |
525 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
526 // (In anycase, the execption mark will fail if it do so) | |
527 return array_klass_impl(true, rank, THREAD); | |
528 } | |
529 | |
530 | |
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531 Klass* Klass::array_klass_or_null() { |
0 | 532 EXCEPTION_MARK; |
533 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
534 // (In anycase, the execption mark will fail if it do so) | |
535 return array_klass_impl(true, THREAD); | |
536 } | |
537 | |
538 | |
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539 Klass* Klass::array_klass_impl(bool or_null, int rank, TRAPS) { |
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540 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
0 | 541 return NULL; |
542 } | |
543 | |
544 | |
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545 Klass* Klass::array_klass_impl(bool or_null, TRAPS) { |
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546 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
0 | 547 return NULL; |
548 } | |
549 | |
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550 oop Klass::class_loader() const { return class_loader_data()->class_loader(); } |
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551 |
0 | 552 const char* Klass::external_name() const { |
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553 if (oop_is_instance()) { |
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554 InstanceKlass* ik = (InstanceKlass*) this; |
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555 if (ik->is_anonymous()) { |
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556 assert(EnableInvokeDynamic, ""); |
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557 intptr_t hash = 0; |
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558 if (ik->java_mirror() != NULL) { |
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559 // java_mirror might not be created yet, return 0 as hash. |
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560 hash = ik->java_mirror()->identity_hash(); |
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561 } |
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562 char hash_buf[40]; |
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563 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash); |
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564 size_t hash_len = strlen(hash_buf); |
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565 |
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566 size_t result_len = name()->utf8_length(); |
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567 char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1); |
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568 name()->as_klass_external_name(result, (int) result_len + 1); |
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569 assert(strlen(result) == result_len, ""); |
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570 strcpy(result + result_len, hash_buf); |
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571 assert(strlen(result) == result_len + hash_len, ""); |
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572 return result; |
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573 } |
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574 } |
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575 if (name() == NULL) return "<unknown>"; |
0 | 576 return name()->as_klass_external_name(); |
577 } | |
578 | |
579 | |
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580 const char* Klass::signature_name() const { |
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581 if (name() == NULL) return "<unknown>"; |
0 | 582 return name()->as_C_string(); |
583 } | |
584 | |
585 // Unless overridden, modifier_flags is 0. | |
586 jint Klass::compute_modifier_flags(TRAPS) const { | |
587 return 0; | |
588 } | |
589 | |
590 int Klass::atomic_incr_biased_lock_revocation_count() { | |
591 return (int) Atomic::add(1, &_biased_lock_revocation_count); | |
592 } | |
593 | |
594 // Unless overridden, jvmti_class_status has no flags set. | |
595 jint Klass::jvmti_class_status() const { | |
596 return 0; | |
597 } | |
598 | |
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599 |
0 | 600 // Printing |
601 | |
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602 void Klass::print_on(outputStream* st) const { |
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603 ResourceMark rm; |
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604 // print title |
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605 st->print("%s", internal_name()); |
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606 print_address_on(st); |
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607 st->cr(); |
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608 } |
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609 |
0 | 610 void Klass::oop_print_on(oop obj, outputStream* st) { |
611 ResourceMark rm; | |
612 // print title | |
613 st->print_cr("%s ", internal_name()); | |
614 obj->print_address_on(st); | |
615 | |
616 if (WizardMode) { | |
617 // print header | |
618 obj->mark()->print_on(st); | |
619 } | |
620 | |
621 // print class | |
622 st->print(" - klass: "); | |
623 obj->klass()->print_value_on(st); | |
624 st->cr(); | |
625 } | |
626 | |
627 void Klass::oop_print_value_on(oop obj, outputStream* st) { | |
628 // print title | |
629 ResourceMark rm; // Cannot print in debug mode without this | |
630 st->print("%s", internal_name()); | |
631 obj->print_address_on(st); | |
632 } | |
633 | |
7956 | 634 #if INCLUDE_SERVICES |
635 // Size Statistics | |
636 void Klass::collect_statistics(KlassSizeStats *sz) const { | |
637 sz->_klass_bytes = sz->count(this); | |
638 sz->_mirror_bytes = sz->count(java_mirror()); | |
639 sz->_secondary_supers_bytes = sz->count_array(secondary_supers()); | |
640 | |
641 sz->_ro_bytes += sz->_secondary_supers_bytes; | |
642 sz->_rw_bytes += sz->_klass_bytes + sz->_mirror_bytes; | |
643 } | |
644 #endif // INCLUDE_SERVICES | |
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645 |
0 | 646 // Verification |
647 | |
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648 void Klass::verify_on(outputStream* st) { |
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649 |
11034 | 650 // This can be expensive, but it is worth checking that this klass is actually |
651 // in the CLD graph but not in production. | |
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652 assert(Metaspace::contains((address)this), "Should be"); |
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653 |
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654 guarantee(this->is_klass(),"should be klass"); |
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655 |
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656 if (super() != NULL) { |
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657 guarantee(super()->is_klass(), "should be klass"); |
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658 } |
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659 if (secondary_super_cache() != NULL) { |
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660 Klass* ko = secondary_super_cache(); |
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661 guarantee(ko->is_klass(), "should be klass"); |
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662 } |
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663 for ( uint i = 0; i < primary_super_limit(); i++ ) { |
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664 Klass* ko = _primary_supers[i]; |
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665 if (ko != NULL) { |
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666 guarantee(ko->is_klass(), "should be klass"); |
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667 } |
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668 } |
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669 |
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670 if (java_mirror() != NULL) { |
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671 guarantee(java_mirror()->is_oop(), "should be instance"); |
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672 } |
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673 } |
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674 |
0 | 675 void Klass::oop_verify_on(oop obj, outputStream* st) { |
676 guarantee(obj->is_oop(), "should be oop"); | |
677 guarantee(obj->klass()->is_klass(), "klass field is not a klass"); | |
678 } | |
679 | |
680 #ifndef PRODUCT | |
681 | |
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682 bool Klass::verify_vtable_index(int i) { |
0 | 683 if (oop_is_instance()) { |
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684 int limit = ((InstanceKlass*)this)->vtable_length()/vtableEntry::size(); |
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685 assert(i >= 0 && i < limit, err_msg("index %d out of bounds %d", i, limit)); |
0 | 686 } else { |
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687 assert(oop_is_array(), "Must be"); |
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688 int limit = ((ArrayKlass*)this)->vtable_length()/vtableEntry::size(); |
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689 assert(i >= 0 && i < limit, err_msg("index %d out of bounds %d", i, limit)); |
0 | 690 } |
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691 return true; |
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692 } |
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693 |
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694 bool Klass::verify_itable_index(int i) { |
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695 assert(oop_is_instance(), ""); |
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696 int method_count = klassItable::method_count_for_interface(this); |
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697 assert(i >= 0 && i < method_count, "index out of bounds"); |
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698 return true; |
0 | 699 } |
700 | |
701 #endif | |
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702 |
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703 /////////////// Unit tests /////////////// |
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704 |
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705 #ifndef PRODUCT |
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706 |
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707 class TestKlass { |
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708 public: |
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709 static void test_oop_is_instanceClassLoader() { |
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710 assert(SystemDictionary::ClassLoader_klass()->oop_is_instanceClassLoader(), "assert"); |
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711 assert(!SystemDictionary::String_klass()->oop_is_instanceClassLoader(), "assert"); |
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712 } |
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713 }; |
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714 |
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715 void TestKlass_test() { |
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716 TestKlass::test_oop_is_instanceClassLoader(); |
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717 } |
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718 |
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719 #endif |