Mercurial > hg > graal-compiler
annotate src/share/vm/oops/klass.cpp @ 6781:b711844284e2
7200092: Make NMT a bit friendlier to work with
Reviewed-by: kvn, ysr, azeemj
author | nloodin |
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date | Fri, 21 Sep 2012 10:56:28 +0200 |
parents | da91efe96a93 |
children | d8ce2825b193 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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" |
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32 #include "memory/metadataFactory.hpp" |
1972 | 33 #include "memory/oopFactory.hpp" |
34 #include "memory/resourceArea.hpp" | |
35 #include "oops/instanceKlass.hpp" | |
36 #include "oops/klass.inline.hpp" | |
37 #include "oops/oop.inline2.hpp" | |
38 #include "runtime/atomic.hpp" | |
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39 #include "utilities/stack.hpp" |
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40 #ifndef SERIALGC |
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41 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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42 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
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43 #include "gc_implementation/parallelScavenge/psScavenge.hpp" |
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44 #endif |
0 | 45 |
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46 void Klass::set_name(Symbol* n) { |
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47 _name = n; |
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48 if (_name != NULL) _name->increment_refcount(); |
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49 } |
0 | 50 |
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51 bool Klass::is_subclass_of(Klass* k) const { |
0 | 52 // Run up the super chain and check |
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53 if (this == k) return true; |
0 | 54 |
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55 Klass* t = const_cast<Klass*>(this)->super(); |
0 | 56 |
57 while (t != NULL) { | |
58 if (t == k) return true; | |
59 t = Klass::cast(t)->super(); | |
60 } | |
61 return false; | |
62 } | |
63 | |
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64 bool Klass::search_secondary_supers(Klass* k) const { |
0 | 65 // Put some extra logic here out-of-line, before the search proper. |
66 // This cuts down the size of the inline method. | |
67 | |
68 // This is necessary, since I am never in my own secondary_super list. | |
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69 if (this == k) |
0 | 70 return true; |
71 // Scan the array-of-objects for a match | |
72 int cnt = secondary_supers()->length(); | |
73 for (int i = 0; i < cnt; i++) { | |
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74 if (secondary_supers()->at(i) == k) { |
0 | 75 ((Klass*)this)->set_secondary_super_cache(k); |
76 return true; | |
77 } | |
78 } | |
79 return false; | |
80 } | |
81 | |
82 // Return self, except for abstract classes with exactly 1 | |
83 // implementor. Then return the 1 concrete implementation. | |
84 Klass *Klass::up_cast_abstract() { | |
85 Klass *r = this; | |
86 while( r->is_abstract() ) { // Receiver is abstract? | |
87 Klass *s = r->subklass(); // Check for exactly 1 subklass | |
88 if( !s || s->next_sibling() ) // Oops; wrong count; give up | |
89 return this; // Return 'this' as a no-progress flag | |
90 r = s; // Loop till find concrete class | |
91 } | |
92 return r; // Return the 1 concrete class | |
93 } | |
94 | |
605 | 95 // Find LCA in class hierarchy |
0 | 96 Klass *Klass::LCA( Klass *k2 ) { |
97 Klass *k1 = this; | |
98 while( 1 ) { | |
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99 if( k1->is_subtype_of(k2) ) return k2; |
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100 if( k2->is_subtype_of(k1) ) return k1; |
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101 k1 = k1->super(); |
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102 k2 = k2->super(); |
0 | 103 } |
104 } | |
105 | |
106 | |
107 void Klass::check_valid_for_instantiation(bool throwError, TRAPS) { | |
108 ResourceMark rm(THREAD); | |
109 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
110 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
111 } | |
112 | |
113 | |
114 void Klass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) { | |
115 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
116 } | |
117 | |
118 | |
119 void Klass::initialize(TRAPS) { | |
120 ShouldNotReachHere(); | |
121 } | |
122 | |
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123 bool Klass::compute_is_subtype_of(Klass* k) { |
0 | 124 assert(k->is_klass(), "argument must be a class"); |
125 return is_subclass_of(k); | |
126 } | |
127 | |
128 | |
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129 Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
0 | 130 #ifdef ASSERT |
131 tty->print_cr("Error: uncached_lookup_method called on a klass oop." | |
132 " Likely error: reflection method does not correctly" | |
133 " wrap return value in a mirror object."); | |
134 #endif | |
135 ShouldNotReachHere(); | |
136 return NULL; | |
137 } | |
138 | |
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139 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) { |
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140 return Metaspace::allocate(loader_data, word_size, /*read_only*/false, |
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141 Metaspace::ClassType, CHECK_NULL); |
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142 } |
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143 |
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144 Klass::Klass() { |
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145 Klass* k = this; |
0 | 146 |
147 { // Preinitialize supertype information. | |
148 // A later call to initialize_supers() may update these settings: | |
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149 set_super(NULL); |
0 | 150 for (juint i = 0; i < Klass::primary_super_limit(); i++) { |
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151 _primary_supers[i] = NULL; |
0 | 152 } |
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153 set_secondary_supers(NULL); |
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154 _primary_supers[0] = k; |
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155 set_super_check_offset(in_bytes(primary_supers_offset())); |
0 | 156 } |
157 | |
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158 set_java_mirror(NULL); |
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159 set_modifier_flags(0); |
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160 set_layout_helper(Klass::_lh_neutral_value); |
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161 set_name(NULL); |
0 | 162 AccessFlags af; |
163 af.set_flags(0); | |
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164 set_access_flags(af); |
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165 set_subklass(NULL); |
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166 set_next_sibling(NULL); |
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167 set_next_link(NULL); |
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168 set_alloc_count(0); |
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169 TRACE_SET_KLASS_TRACE_ID(this, 0); |
0 | 170 |
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171 set_prototype_header(markOopDesc::prototype()); |
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172 set_biased_lock_revocation_count(0); |
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173 set_last_biased_lock_bulk_revocation_time(0); |
0 | 174 |
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175 // The klass doesn't have any references at this point. |
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176 clear_modified_oops(); |
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177 clear_accumulated_modified_oops(); |
0 | 178 } |
179 | |
180 jint Klass::array_layout_helper(BasicType etype) { | |
181 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype"); | |
182 // Note that T_ARRAY is not allowed here. | |
183 int hsize = arrayOopDesc::base_offset_in_bytes(etype); | |
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184 int esize = type2aelembytes(etype); |
0 | 185 bool isobj = (etype == T_OBJECT); |
186 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value; | |
187 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize)); | |
188 | |
189 assert(lh < (int)_lh_neutral_value, "must look like an array layout"); | |
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190 assert(layout_helper_is_array(lh), "correct kind"); |
0 | 191 assert(layout_helper_is_objArray(lh) == isobj, "correct kind"); |
192 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind"); | |
193 assert(layout_helper_header_size(lh) == hsize, "correct decode"); | |
194 assert(layout_helper_element_type(lh) == etype, "correct decode"); | |
195 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode"); | |
196 | |
197 return lh; | |
198 } | |
199 | |
200 bool Klass::can_be_primary_super_slow() const { | |
201 if (super() == NULL) | |
202 return true; | |
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203 else if (super()->super_depth() >= primary_super_limit()-1) |
0 | 204 return false; |
205 else | |
206 return true; | |
207 } | |
208 | |
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209 void Klass::initialize_supers(Klass* k, TRAPS) { |
0 | 210 if (FastSuperclassLimit == 0) { |
211 // None of the other machinery matters. | |
212 set_super(k); | |
213 return; | |
214 } | |
215 if (k == NULL) { | |
216 set_super(NULL); | |
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217 _primary_supers[0] = this; |
0 | 218 assert(super_depth() == 0, "Object must already be initialized properly"); |
1142 | 219 } else if (k != super() || k == SystemDictionary::Object_klass()) { |
220 assert(super() == NULL || super() == SystemDictionary::Object_klass(), | |
0 | 221 "initialize this only once to a non-trivial value"); |
222 set_super(k); | |
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223 Klass* sup = k; |
0 | 224 int sup_depth = sup->super_depth(); |
225 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit()); | |
226 if (!can_be_primary_super_slow()) | |
227 my_depth = primary_super_limit(); | |
228 for (juint i = 0; i < my_depth; i++) { | |
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229 _primary_supers[i] = sup->_primary_supers[i]; |
0 | 230 } |
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231 Klass* *super_check_cell; |
0 | 232 if (my_depth < primary_super_limit()) { |
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233 _primary_supers[my_depth] = this; |
0 | 234 super_check_cell = &_primary_supers[my_depth]; |
235 } else { | |
236 // Overflow of the primary_supers array forces me to be secondary. | |
237 super_check_cell = &_secondary_super_cache; | |
238 } | |
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239 set_super_check_offset((address)super_check_cell - (address) this); |
0 | 240 |
241 #ifdef ASSERT | |
242 { | |
243 juint j = super_depth(); | |
244 assert(j == my_depth, "computed accessor gets right answer"); | |
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245 Klass* t = this; |
0 | 246 while (!Klass::cast(t)->can_be_primary_super()) { |
247 t = Klass::cast(t)->super(); | |
248 j = Klass::cast(t)->super_depth(); | |
249 } | |
250 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) { | |
251 assert(primary_super_of_depth(j1) == NULL, "super list padding"); | |
252 } | |
253 while (t != NULL) { | |
254 assert(primary_super_of_depth(j) == t, "super list initialization"); | |
255 t = Klass::cast(t)->super(); | |
256 --j; | |
257 } | |
258 assert(j == (juint)-1, "correct depth count"); | |
259 } | |
260 #endif | |
261 } | |
262 | |
263 if (secondary_supers() == NULL) { | |
264 KlassHandle this_kh (THREAD, this); | |
265 | |
266 // Now compute the list of secondary supertypes. | |
267 // Secondaries can occasionally be on the super chain, | |
268 // if the inline "_primary_supers" array overflows. | |
269 int extras = 0; | |
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270 Klass* p; |
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271 for (p = super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 272 ++extras; |
273 } | |
274 | |
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275 ResourceMark rm(THREAD); // need to reclaim GrowableArrays allocated below |
0 | 276 |
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277 // Compute the "real" non-extra secondaries. |
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278 GrowableArray<Klass*>* secondaries = compute_secondary_supers(extras); |
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279 if (secondaries == NULL) { |
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280 // secondary_supers set by compute_secondary_supers |
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281 return; |
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282 } |
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283 |
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284 GrowableArray<Klass*>* primaries = new GrowableArray<Klass*>(extras); |
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285 |
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286 for (p = this_kh->super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 287 int i; // Scan for overflow primaries being duplicates of 2nd'arys |
288 | |
289 // This happens frequently for very deeply nested arrays: the | |
290 // primary superclass chain overflows into the secondary. The | |
291 // secondary list contains the element_klass's secondaries with | |
292 // an extra array dimension added. If the element_klass's | |
293 // secondary list already contains some primary overflows, they | |
294 // (with the extra level of array-ness) will collide with the | |
295 // normal primary superclass overflows. | |
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296 for( i = 0; i < secondaries->length(); i++ ) { |
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297 if( secondaries->at(i) == p ) |
0 | 298 break; |
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299 } |
0 | 300 if( i < secondaries->length() ) |
301 continue; // It's a dup, don't put it in | |
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302 primaries->push(p); |
0 | 303 } |
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304 // Combine the two arrays into a metadata object to pack the array. |
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305 // The primaries are added in the reverse order, then the secondaries. |
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306 int new_length = primaries->length() + secondaries->length(); |
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307 Array<Klass*>* s2 = MetadataFactory::new_array<Klass*>( |
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308 class_loader_data(), new_length, CHECK); |
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309 int fill_p = primaries->length(); |
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310 for (int j = 0; j < fill_p; j++) { |
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311 s2->at_put(j, primaries->pop()); // add primaries in reverse order. |
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312 } |
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313 for( int j = 0; j < secondaries->length(); j++ ) { |
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314 s2->at_put(j+fill_p, secondaries->at(j)); // add secondaries on the end. |
0 | 315 } |
316 | |
317 #ifdef ASSERT | |
318 // We must not copy any NULL placeholders left over from bootstrap. | |
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319 for (int j = 0; j < s2->length(); j++) { |
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320 assert(s2->at(j) != NULL, "correct bootstrapping order"); |
0 | 321 } |
322 #endif | |
323 | |
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324 this_kh->set_secondary_supers(s2); |
0 | 325 } |
326 } | |
327 | |
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328 GrowableArray<Klass*>* Klass::compute_secondary_supers(int num_extra_slots) { |
0 | 329 assert(num_extra_slots == 0, "override for complex klasses"); |
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330 set_secondary_supers(Universe::the_empty_klass_array()); |
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331 return NULL; |
0 | 332 } |
333 | |
334 | |
335 Klass* Klass::subklass() const { | |
336 return _subklass == NULL ? NULL : Klass::cast(_subklass); | |
337 } | |
338 | |
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339 InstanceKlass* Klass::superklass() const { |
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340 assert(super() == NULL || super()->oop_is_instance(), "must be instance klass"); |
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341 return _super == NULL ? NULL : InstanceKlass::cast(_super); |
0 | 342 } |
343 | |
344 Klass* Klass::next_sibling() const { | |
345 return _next_sibling == NULL ? NULL : Klass::cast(_next_sibling); | |
346 } | |
347 | |
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348 void Klass::set_subklass(Klass* s) { |
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349 assert(s != this, "sanity check"); |
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350 _subklass = s; |
0 | 351 } |
352 | |
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353 void Klass::set_next_sibling(Klass* s) { |
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354 assert(s != this, "sanity check"); |
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355 _next_sibling = s; |
0 | 356 } |
357 | |
358 void Klass::append_to_sibling_list() { | |
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359 debug_only(if (!SharedSkipVerify) verify();) |
0 | 360 // add ourselves to superklass' subklass list |
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361 InstanceKlass* super = superklass(); |
0 | 362 if (super == NULL) return; // special case: class Object |
363 assert(SharedSkipVerify || | |
364 (!super->is_interface() // interfaces cannot be supers | |
365 && (super->superklass() == NULL || !is_interface())), | |
366 "an interface can only be a subklass of Object"); | |
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367 Klass* prev_first_subklass = super->subklass_oop(); |
0 | 368 if (prev_first_subklass != NULL) { |
369 // set our sibling to be the superklass' previous first subklass | |
370 set_next_sibling(prev_first_subklass); | |
371 } | |
372 // make ourselves the superklass' first subklass | |
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373 super->set_subklass(this); |
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374 debug_only(if (!SharedSkipVerify) verify();) |
0 | 375 } |
376 | |
377 void Klass::remove_from_sibling_list() { | |
378 // remove receiver from sibling list | |
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379 InstanceKlass* super = superklass(); |
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380 assert(super != NULL || this == SystemDictionary::Object_klass(), "should have super"); |
0 | 381 if (super == NULL) return; // special case: class Object |
382 if (super->subklass() == this) { | |
383 // first subklass | |
384 super->set_subklass(_next_sibling); | |
385 } else { | |
386 Klass* sib = super->subklass(); | |
387 while (sib->next_sibling() != this) { | |
388 sib = sib->next_sibling(); | |
389 }; | |
390 sib->set_next_sibling(_next_sibling); | |
391 } | |
392 } | |
393 | |
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394 bool Klass::is_loader_alive(BoolObjectClosure* is_alive) { |
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395 assert(is_metadata(), "p is not meta-data"); |
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396 assert(ClassLoaderDataGraph::contains((address)this), "is in the metaspace"); |
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397 // The class is alive iff the class loader is alive. |
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398 oop loader = class_loader(); |
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399 return (loader == NULL) || is_alive->do_object_b(loader); |
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400 } |
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401 |
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402 void Klass::clean_weak_klass_links(BoolObjectClosure* is_alive) { |
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403 if (!ClassUnloading) { |
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404 return; |
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405 } |
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406 |
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407 Klass* root = SystemDictionary::Object_klass(); |
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408 Stack<Klass*, mtGC> stack; |
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409 |
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410 stack.push(root); |
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411 while (!stack.is_empty()) { |
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412 Klass* current = stack.pop(); |
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413 |
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414 assert(current->is_loader_alive(is_alive), "just checking, this should be live"); |
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415 |
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416 // Find and set the first alive subklass |
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417 Klass* sub = current->subklass_oop(); |
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418 while (sub != NULL && !sub->is_loader_alive(is_alive)) { |
0 | 419 #ifndef PRODUCT |
420 if (TraceClassUnloading && WizardMode) { | |
421 ResourceMark rm; | |
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422 tty->print_cr("[Unlinking class (subclass) %s]", sub->external_name()); |
0 | 423 } |
424 #endif | |
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425 sub = sub->next_sibling_oop(); |
0 | 426 } |
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427 current->set_subklass(sub); |
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428 if (sub != NULL) { |
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429 stack.push(sub); |
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430 } |
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431 |
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432 // Find and set the first alive sibling |
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433 Klass* sibling = current->next_sibling_oop(); |
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434 while (sibling != NULL && !sibling->is_loader_alive(is_alive)) { |
0 | 435 if (TraceClassUnloading && WizardMode) { |
436 ResourceMark rm; | |
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437 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name()); |
0 | 438 } |
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439 sibling = sibling->next_sibling_oop(); |
0 | 440 } |
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441 current->set_next_sibling(sibling); |
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442 if (sibling != NULL) { |
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443 stack.push(sibling); |
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444 } |
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445 |
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446 // Clean the implementors list and method data. |
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447 if (current->oop_is_instance()) { |
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448 InstanceKlass* ik = InstanceKlass::cast(current); |
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449 ik->clean_implementors_list(is_alive); |
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450 ik->clean_method_data(is_alive); |
0 | 451 } |
452 } | |
453 } | |
454 | |
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455 void Klass::klass_update_barrier_set(oop v) { |
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456 record_modified_oops(); |
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457 } |
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458 |
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459 void Klass::klass_update_barrier_set_pre(void* p, oop v) { |
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460 // This barrier used by G1, where it's used remember the old oop values, |
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461 // so that we don't forget any objects that were live at the snapshot at |
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462 // the beginning. This function is only used when we write oops into |
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463 // Klasses. Since the Klasses are used as roots in G1, we don't have to |
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464 // do anything here. |
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465 } |
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466 |
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467 void Klass::klass_oop_store(oop* p, oop v) { |
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468 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
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469 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
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470 |
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471 // do the store |
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472 if (always_do_update_barrier) { |
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473 klass_oop_store((volatile oop*)p, v); |
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474 } else { |
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475 klass_update_barrier_set_pre((void*)p, v); |
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476 *p = v; |
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477 klass_update_barrier_set(v); |
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478 } |
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479 } |
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480 |
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481 void Klass::klass_oop_store(volatile oop* p, oop v) { |
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482 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
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483 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
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484 |
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485 klass_update_barrier_set_pre((void*)p, v); |
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486 OrderAccess::release_store_ptr(p, v); |
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487 klass_update_barrier_set(v); |
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488 } |
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489 |
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490 void Klass::oops_do(OopClosure* cl) { |
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491 cl->do_oop(&_java_mirror); |
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492 } |
0 | 493 |
494 void Klass::remove_unshareable_info() { | |
495 set_subklass(NULL); | |
496 set_next_sibling(NULL); | |
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497 // Clear the java mirror |
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498 set_java_mirror(NULL); |
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499 set_next_link(NULL); |
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500 |
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501 // Null out class_loader_data because we don't share that yet. |
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502 set_class_loader_data(NULL); |
0 | 503 } |
504 | |
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505 void Klass::restore_unshareable_info(TRAPS) { |
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506 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
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507 // Restore class_loader_data to the null class loader data |
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508 set_class_loader_data(loader_data); |
0 | 509 |
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510 // Add to null class loader list first before creating the mirror |
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511 // (same order as class file parsing) |
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512 loader_data->add_class(this); |
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513 |
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514 // Recreate the class mirror |
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515 java_lang_Class::create_mirror(this, CHECK); |
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516 } |
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517 |
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518 Klass* Klass::array_klass_or_null(int rank) { |
0 | 519 EXCEPTION_MARK; |
520 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
521 // (In anycase, the execption mark will fail if it do so) | |
522 return array_klass_impl(true, rank, THREAD); | |
523 } | |
524 | |
525 | |
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526 Klass* Klass::array_klass_or_null() { |
0 | 527 EXCEPTION_MARK; |
528 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
529 // (In anycase, the execption mark will fail if it do so) | |
530 return array_klass_impl(true, THREAD); | |
531 } | |
532 | |
533 | |
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534 Klass* Klass::array_klass_impl(bool or_null, int rank, TRAPS) { |
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535 fatal("array_klass should be dispatched to InstanceKlass, objArrayKlass or typeArrayKlass"); |
0 | 536 return NULL; |
537 } | |
538 | |
539 | |
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540 Klass* Klass::array_klass_impl(bool or_null, TRAPS) { |
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541 fatal("array_klass should be dispatched to InstanceKlass, objArrayKlass or typeArrayKlass"); |
0 | 542 return NULL; |
543 } | |
544 | |
545 | |
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546 void Klass::with_array_klasses_do(void f(Klass* k)) { |
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547 f(this); |
0 | 548 } |
549 | |
550 | |
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551 oop Klass::class_loader() const { return class_loader_data()->class_loader(); } |
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552 |
0 | 553 const char* Klass::external_name() const { |
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554 if (oop_is_instance()) { |
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555 InstanceKlass* ik = (InstanceKlass*) this; |
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556 if (ik->is_anonymous()) { |
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557 assert(EnableInvokeDynamic, ""); |
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558 intptr_t hash = ik->java_mirror()->identity_hash(); |
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559 char hash_buf[40]; |
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560 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash); |
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561 size_t hash_len = strlen(hash_buf); |
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562 |
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563 size_t result_len = name()->utf8_length(); |
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564 char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1); |
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565 name()->as_klass_external_name(result, (int) result_len + 1); |
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566 assert(strlen(result) == result_len, ""); |
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567 strcpy(result + result_len, hash_buf); |
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568 assert(strlen(result) == result_len + hash_len, ""); |
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569 return result; |
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570 } |
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571 } |
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572 if (name() == NULL) return "<unknown>"; |
0 | 573 return name()->as_klass_external_name(); |
574 } | |
575 | |
576 | |
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577 const char* Klass::signature_name() const { |
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578 if (name() == NULL) return "<unknown>"; |
0 | 579 return name()->as_C_string(); |
580 } | |
581 | |
582 // Unless overridden, modifier_flags is 0. | |
583 jint Klass::compute_modifier_flags(TRAPS) const { | |
584 return 0; | |
585 } | |
586 | |
587 int Klass::atomic_incr_biased_lock_revocation_count() { | |
588 return (int) Atomic::add(1, &_biased_lock_revocation_count); | |
589 } | |
590 | |
591 // Unless overridden, jvmti_class_status has no flags set. | |
592 jint Klass::jvmti_class_status() const { | |
593 return 0; | |
594 } | |
595 | |
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596 |
0 | 597 // Printing |
598 | |
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599 void Klass::print_on(outputStream* st) const { |
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600 ResourceMark rm; |
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601 // print title |
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602 st->print("%s", internal_name()); |
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603 print_address_on(st); |
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604 st->cr(); |
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605 } |
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606 |
0 | 607 void Klass::oop_print_on(oop obj, outputStream* st) { |
608 ResourceMark rm; | |
609 // print title | |
610 st->print_cr("%s ", internal_name()); | |
611 obj->print_address_on(st); | |
612 | |
613 if (WizardMode) { | |
614 // print header | |
615 obj->mark()->print_on(st); | |
616 } | |
617 | |
618 // print class | |
619 st->print(" - klass: "); | |
620 obj->klass()->print_value_on(st); | |
621 st->cr(); | |
622 } | |
623 | |
624 void Klass::oop_print_value_on(oop obj, outputStream* st) { | |
625 // print title | |
626 ResourceMark rm; // Cannot print in debug mode without this | |
627 st->print("%s", internal_name()); | |
628 obj->print_address_on(st); | |
629 } | |
630 | |
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631 |
0 | 632 // Verification |
633 | |
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634 void Klass::verify_on(outputStream* st) { |
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635 guarantee(!Universe::heap()->is_in_reserved(this), "Shouldn't be"); |
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636 guarantee(this->is_metadata(), "should be in metaspace"); |
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637 |
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638 assert(ClassLoaderDataGraph::contains((address)this), "Should be"); |
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639 |
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640 guarantee(this->is_klass(),"should be klass"); |
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641 |
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642 if (super() != NULL) { |
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643 guarantee(super()->is_metadata(), "should be in metaspace"); |
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644 guarantee(super()->is_klass(), "should be klass"); |
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645 } |
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646 if (secondary_super_cache() != NULL) { |
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647 Klass* ko = secondary_super_cache(); |
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648 guarantee(ko->is_metadata(), "should be in metaspace"); |
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649 guarantee(ko->is_klass(), "should be klass"); |
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650 } |
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651 for ( uint i = 0; i < primary_super_limit(); i++ ) { |
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652 Klass* ko = _primary_supers[i]; |
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653 if (ko != NULL) { |
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654 guarantee(ko->is_metadata(), "should be in metaspace"); |
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655 guarantee(ko->is_klass(), "should be klass"); |
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656 } |
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657 } |
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658 |
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659 if (java_mirror() != NULL) { |
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660 guarantee(java_mirror()->is_oop(), "should be instance"); |
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661 } |
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662 } |
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663 |
0 | 664 void Klass::oop_verify_on(oop obj, outputStream* st) { |
665 guarantee(obj->is_oop(), "should be oop"); | |
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666 guarantee(obj->klass()->is_metadata(), "should not be in Java heap"); |
0 | 667 guarantee(obj->klass()->is_klass(), "klass field is not a klass"); |
668 } | |
669 | |
670 #ifndef PRODUCT | |
671 | |
672 void Klass::verify_vtable_index(int i) { | |
673 if (oop_is_instance()) { | |
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674 assert(i>=0 && i<((InstanceKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); |
0 | 675 } else { |
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676 assert(oop_is_array(), "Must be"); |
0 | 677 assert(i>=0 && i<((arrayKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); |
678 } | |
679 } | |
680 | |
681 #endif |