Mercurial > hg > truffle
annotate src/share/vm/oops/klass.cpp @ 14694:58cf34613a72
8036976: PPC64: implement the template interpreter
Reviewed-by: kvn, coleenp
Contributed-by: axel.siebenborn@sap.com, martin.doerr@sap.com
author | goetz |
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date | Mon, 10 Mar 2014 12:58:02 +0100 |
parents | 7f0e0366ec81 |
children | d8041d695d19 |
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" | |
39 #include "runtime/atomic.hpp" | |
10405 | 40 #include "trace/traceMacros.hpp" |
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41 #include "utilities/stack.hpp" |
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42 #include "utilities/macros.hpp" |
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43 #if INCLUDE_ALL_GCS |
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44 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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45 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
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46 #include "gc_implementation/parallelScavenge/psScavenge.hpp" |
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47 #endif // INCLUDE_ALL_GCS |
0 | 48 |
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49 void Klass::set_name(Symbol* n) { |
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50 _name = n; |
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51 if (_name != NULL) _name->increment_refcount(); |
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52 } |
0 | 53 |
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54 bool Klass::is_subclass_of(const Klass* k) const { |
0 | 55 // Run up the super chain and check |
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56 if (this == k) return true; |
0 | 57 |
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58 Klass* t = const_cast<Klass*>(this)->super(); |
0 | 59 |
60 while (t != NULL) { | |
61 if (t == k) return true; | |
6983 | 62 t = t->super(); |
0 | 63 } |
64 return false; | |
65 } | |
66 | |
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67 bool Klass::search_secondary_supers(Klass* k) const { |
0 | 68 // Put some extra logic here out-of-line, before the search proper. |
69 // This cuts down the size of the inline method. | |
70 | |
71 // This is necessary, since I am never in my own secondary_super list. | |
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72 if (this == k) |
0 | 73 return true; |
74 // Scan the array-of-objects for a match | |
75 int cnt = secondary_supers()->length(); | |
76 for (int i = 0; i < cnt; i++) { | |
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77 if (secondary_supers()->at(i) == k) { |
0 | 78 ((Klass*)this)->set_secondary_super_cache(k); |
79 return true; | |
80 } | |
81 } | |
82 return false; | |
83 } | |
84 | |
85 // Return self, except for abstract classes with exactly 1 | |
86 // implementor. Then return the 1 concrete implementation. | |
87 Klass *Klass::up_cast_abstract() { | |
88 Klass *r = this; | |
89 while( r->is_abstract() ) { // Receiver is abstract? | |
90 Klass *s = r->subklass(); // Check for exactly 1 subklass | |
91 if( !s || s->next_sibling() ) // Oops; wrong count; give up | |
92 return this; // Return 'this' as a no-progress flag | |
93 r = s; // Loop till find concrete class | |
94 } | |
95 return r; // Return the 1 concrete class | |
96 } | |
97 | |
605 | 98 // Find LCA in class hierarchy |
0 | 99 Klass *Klass::LCA( Klass *k2 ) { |
100 Klass *k1 = this; | |
101 while( 1 ) { | |
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102 if( k1->is_subtype_of(k2) ) return k2; |
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103 if( k2->is_subtype_of(k1) ) return k1; |
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104 k1 = k1->super(); |
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105 k2 = k2->super(); |
0 | 106 } |
107 } | |
108 | |
109 | |
110 void Klass::check_valid_for_instantiation(bool throwError, TRAPS) { | |
111 ResourceMark rm(THREAD); | |
112 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
113 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
114 } | |
115 | |
116 | |
117 void Klass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) { | |
118 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
119 } | |
120 | |
121 | |
122 void Klass::initialize(TRAPS) { | |
123 ShouldNotReachHere(); | |
124 } | |
125 | |
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126 bool Klass::compute_is_subtype_of(Klass* k) { |
0 | 127 assert(k->is_klass(), "argument must be a class"); |
128 return is_subclass_of(k); | |
129 } | |
130 | |
131 | |
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132 Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
0 | 133 #ifdef ASSERT |
134 tty->print_cr("Error: uncached_lookup_method called on a klass oop." | |
135 " Likely error: reflection method does not correctly" | |
136 " wrap return value in a mirror object."); | |
137 #endif | |
138 ShouldNotReachHere(); | |
139 return NULL; | |
140 } | |
141 | |
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142 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() { |
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143 return Metaspace::allocate(loader_data, word_size, /*read_only*/false, |
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144 MetaspaceObj::ClassType, CHECK_NULL); |
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145 } |
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146 |
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147 Klass::Klass() { |
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148 Klass* k = this; |
0 | 149 |
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150 // Preinitialize supertype information. |
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151 // A later call to initialize_supers() may update these settings: |
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152 set_super(NULL); |
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153 for (juint i = 0; i < Klass::primary_super_limit(); i++) { |
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154 _primary_supers[i] = NULL; |
0 | 155 } |
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156 set_secondary_supers(NULL); |
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157 set_secondary_super_cache(NULL); |
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158 _primary_supers[0] = k; |
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159 set_super_check_offset(in_bytes(primary_supers_offset())); |
0 | 160 |
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161 set_java_mirror(NULL); |
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162 set_modifier_flags(0); |
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163 set_layout_helper(Klass::_lh_neutral_value); |
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164 set_name(NULL); |
0 | 165 AccessFlags af; |
166 af.set_flags(0); | |
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167 set_access_flags(af); |
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168 set_subklass(NULL); |
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169 set_next_sibling(NULL); |
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170 set_next_link(NULL); |
10405 | 171 TRACE_INIT_ID(this); |
0 | 172 |
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173 set_prototype_header(markOopDesc::prototype()); |
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174 set_biased_lock_revocation_count(0); |
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175 set_last_biased_lock_bulk_revocation_time(0); |
0 | 176 |
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177 // The klass doesn't have any references at this point. |
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178 clear_modified_oops(); |
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179 clear_accumulated_modified_oops(); |
0 | 180 } |
181 | |
182 jint Klass::array_layout_helper(BasicType etype) { | |
183 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype"); | |
184 // Note that T_ARRAY is not allowed here. | |
185 int hsize = arrayOopDesc::base_offset_in_bytes(etype); | |
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186 int esize = type2aelembytes(etype); |
0 | 187 bool isobj = (etype == T_OBJECT); |
188 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value; | |
189 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize)); | |
190 | |
191 assert(lh < (int)_lh_neutral_value, "must look like an array layout"); | |
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192 assert(layout_helper_is_array(lh), "correct kind"); |
0 | 193 assert(layout_helper_is_objArray(lh) == isobj, "correct kind"); |
194 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind"); | |
195 assert(layout_helper_header_size(lh) == hsize, "correct decode"); | |
196 assert(layout_helper_element_type(lh) == etype, "correct decode"); | |
197 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode"); | |
198 | |
199 return lh; | |
200 } | |
201 | |
202 bool Klass::can_be_primary_super_slow() const { | |
203 if (super() == NULL) | |
204 return true; | |
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205 else if (super()->super_depth() >= primary_super_limit()-1) |
0 | 206 return false; |
207 else | |
208 return true; | |
209 } | |
210 | |
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211 void Klass::initialize_supers(Klass* k, TRAPS) { |
0 | 212 if (FastSuperclassLimit == 0) { |
213 // None of the other machinery matters. | |
214 set_super(k); | |
215 return; | |
216 } | |
217 if (k == NULL) { | |
218 set_super(NULL); | |
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219 _primary_supers[0] = this; |
0 | 220 assert(super_depth() == 0, "Object must already be initialized properly"); |
1142 | 221 } else if (k != super() || k == SystemDictionary::Object_klass()) { |
222 assert(super() == NULL || super() == SystemDictionary::Object_klass(), | |
0 | 223 "initialize this only once to a non-trivial value"); |
224 set_super(k); | |
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225 Klass* sup = k; |
0 | 226 int sup_depth = sup->super_depth(); |
227 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit()); | |
228 if (!can_be_primary_super_slow()) | |
229 my_depth = primary_super_limit(); | |
230 for (juint i = 0; i < my_depth; i++) { | |
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231 _primary_supers[i] = sup->_primary_supers[i]; |
0 | 232 } |
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233 Klass* *super_check_cell; |
0 | 234 if (my_depth < primary_super_limit()) { |
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235 _primary_supers[my_depth] = this; |
0 | 236 super_check_cell = &_primary_supers[my_depth]; |
237 } else { | |
238 // Overflow of the primary_supers array forces me to be secondary. | |
239 super_check_cell = &_secondary_super_cache; | |
240 } | |
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241 set_super_check_offset((address)super_check_cell - (address) this); |
0 | 242 |
243 #ifdef ASSERT | |
244 { | |
245 juint j = super_depth(); | |
246 assert(j == my_depth, "computed accessor gets right answer"); | |
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247 Klass* t = this; |
6983 | 248 while (!t->can_be_primary_super()) { |
249 t = t->super(); | |
250 j = t->super_depth(); | |
0 | 251 } |
252 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) { | |
253 assert(primary_super_of_depth(j1) == NULL, "super list padding"); | |
254 } | |
255 while (t != NULL) { | |
256 assert(primary_super_of_depth(j) == t, "super list initialization"); | |
6983 | 257 t = t->super(); |
0 | 258 --j; |
259 } | |
260 assert(j == (juint)-1, "correct depth count"); | |
261 } | |
262 #endif | |
263 } | |
264 | |
265 if (secondary_supers() == NULL) { | |
266 KlassHandle this_kh (THREAD, this); | |
267 | |
268 // Now compute the list of secondary supertypes. | |
269 // Secondaries can occasionally be on the super chain, | |
270 // if the inline "_primary_supers" array overflows. | |
271 int extras = 0; | |
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272 Klass* p; |
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273 for (p = super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 274 ++extras; |
275 } | |
276 | |
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277 ResourceMark rm(THREAD); // need to reclaim GrowableArrays allocated below |
0 | 278 |
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279 // Compute the "real" non-extra secondaries. |
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280 GrowableArray<Klass*>* secondaries = compute_secondary_supers(extras); |
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281 if (secondaries == NULL) { |
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282 // secondary_supers set by compute_secondary_supers |
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283 return; |
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284 } |
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285 |
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286 GrowableArray<Klass*>* primaries = new GrowableArray<Klass*>(extras); |
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287 |
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288 for (p = this_kh->super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 289 int i; // Scan for overflow primaries being duplicates of 2nd'arys |
290 | |
291 // This happens frequently for very deeply nested arrays: the | |
292 // primary superclass chain overflows into the secondary. The | |
293 // secondary list contains the element_klass's secondaries with | |
294 // an extra array dimension added. If the element_klass's | |
295 // secondary list already contains some primary overflows, they | |
296 // (with the extra level of array-ness) will collide with the | |
297 // normal primary superclass overflows. | |
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298 for( i = 0; i < secondaries->length(); i++ ) { |
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299 if( secondaries->at(i) == p ) |
0 | 300 break; |
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301 } |
0 | 302 if( i < secondaries->length() ) |
303 continue; // It's a dup, don't put it in | |
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304 primaries->push(p); |
0 | 305 } |
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306 // Combine the two arrays into a metadata object to pack the array. |
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307 // The primaries are added in the reverse order, then the secondaries. |
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308 int new_length = primaries->length() + secondaries->length(); |
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309 Array<Klass*>* s2 = MetadataFactory::new_array<Klass*>( |
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310 class_loader_data(), new_length, CHECK); |
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311 int fill_p = primaries->length(); |
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312 for (int j = 0; j < fill_p; j++) { |
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313 s2->at_put(j, primaries->pop()); // add primaries in reverse order. |
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314 } |
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315 for( int j = 0; j < secondaries->length(); j++ ) { |
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316 s2->at_put(j+fill_p, secondaries->at(j)); // add secondaries on the end. |
0 | 317 } |
318 | |
319 #ifdef ASSERT | |
320 // We must not copy any NULL placeholders left over from bootstrap. | |
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321 for (int j = 0; j < s2->length(); j++) { |
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322 assert(s2->at(j) != NULL, "correct bootstrapping order"); |
0 | 323 } |
324 #endif | |
325 | |
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326 this_kh->set_secondary_supers(s2); |
0 | 327 } |
328 } | |
329 | |
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330 GrowableArray<Klass*>* Klass::compute_secondary_supers(int num_extra_slots) { |
0 | 331 assert(num_extra_slots == 0, "override for complex klasses"); |
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332 set_secondary_supers(Universe::the_empty_klass_array()); |
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333 return NULL; |
0 | 334 } |
335 | |
336 | |
337 Klass* Klass::subklass() const { | |
6983 | 338 return _subklass == NULL ? NULL : _subklass; |
0 | 339 } |
340 | |
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341 InstanceKlass* Klass::superklass() const { |
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342 assert(super() == NULL || super()->oop_is_instance(), "must be instance klass"); |
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343 return _super == NULL ? NULL : InstanceKlass::cast(_super); |
0 | 344 } |
345 | |
346 Klass* Klass::next_sibling() const { | |
6983 | 347 return _next_sibling == NULL ? NULL : _next_sibling; |
0 | 348 } |
349 | |
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350 void Klass::set_subklass(Klass* s) { |
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351 assert(s != this, "sanity check"); |
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352 _subklass = s; |
0 | 353 } |
354 | |
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355 void Klass::set_next_sibling(Klass* s) { |
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356 assert(s != this, "sanity check"); |
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357 _next_sibling = s; |
0 | 358 } |
359 | |
360 void Klass::append_to_sibling_list() { | |
6867 | 361 debug_only(verify();) |
0 | 362 // add ourselves to superklass' subklass list |
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363 InstanceKlass* super = superklass(); |
0 | 364 if (super == NULL) return; // special case: class Object |
6867 | 365 assert((!super->is_interface() // interfaces cannot be supers |
0 | 366 && (super->superklass() == NULL || !is_interface())), |
367 "an interface can only be a subklass of Object"); | |
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368 Klass* prev_first_subklass = super->subklass_oop(); |
0 | 369 if (prev_first_subklass != NULL) { |
370 // set our sibling to be the superklass' previous first subklass | |
371 set_next_sibling(prev_first_subklass); | |
372 } | |
373 // make ourselves the superklass' first subklass | |
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374 super->set_subklass(this); |
6867 | 375 debug_only(verify();) |
0 | 376 } |
377 | |
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378 bool Klass::is_loader_alive(BoolObjectClosure* is_alive) { |
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379 #ifdef ASSERT |
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380 // The class is alive iff the class loader is alive. |
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381 oop loader = class_loader(); |
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382 bool loader_alive = (loader == NULL) || is_alive->do_object_b(loader); |
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383 #endif // ASSERT |
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384 |
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385 // The class is alive if it's mirror is alive (which should be marked if the |
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386 // loader is alive) unless it's an anoymous class. |
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387 bool mirror_alive = is_alive->do_object_b(java_mirror()); |
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388 assert(!mirror_alive || loader_alive, "loader must be alive if the mirror is" |
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389 " but not the other way around with anonymous classes"); |
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390 return mirror_alive; |
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391 } |
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392 |
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393 void Klass::clean_weak_klass_links(BoolObjectClosure* is_alive) { |
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394 if (!ClassUnloading) { |
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395 return; |
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396 } |
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397 |
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398 Klass* root = SystemDictionary::Object_klass(); |
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399 Stack<Klass*, mtGC> stack; |
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400 |
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401 stack.push(root); |
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402 while (!stack.is_empty()) { |
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403 Klass* current = stack.pop(); |
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404 |
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405 assert(current->is_loader_alive(is_alive), "just checking, this should be live"); |
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406 |
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407 // Find and set the first alive subklass |
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408 Klass* sub = current->subklass_oop(); |
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409 while (sub != NULL && !sub->is_loader_alive(is_alive)) { |
0 | 410 #ifndef PRODUCT |
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411 if (TraceClassUnloading && WizardMode) { |
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412 ResourceMark rm; |
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413 tty->print_cr("[Unlinking class (subclass) %s]", sub->external_name()); |
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414 } |
0 | 415 #endif |
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416 sub = sub->next_sibling_oop(); |
0 | 417 } |
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418 current->set_subklass(sub); |
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419 if (sub != NULL) { |
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420 stack.push(sub); |
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421 } |
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422 |
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423 // Find and set the first alive sibling |
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424 Klass* sibling = current->next_sibling_oop(); |
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425 while (sibling != NULL && !sibling->is_loader_alive(is_alive)) { |
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426 if (TraceClassUnloading && WizardMode) { |
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427 ResourceMark rm; |
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428 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name()); |
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429 } |
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430 sibling = sibling->next_sibling_oop(); |
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431 } |
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432 current->set_next_sibling(sibling); |
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433 if (sibling != NULL) { |
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434 stack.push(sibling); |
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435 } |
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436 |
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437 // Clean the implementors list and method data. |
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438 if (current->oop_is_instance()) { |
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439 InstanceKlass* ik = InstanceKlass::cast(current); |
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440 ik->clean_implementors_list(is_alive); |
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441 ik->clean_method_data(is_alive); |
0 | 442 } |
443 } | |
444 } | |
445 | |
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446 void Klass::klass_update_barrier_set(oop v) { |
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447 record_modified_oops(); |
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448 } |
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449 |
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450 void Klass::klass_update_barrier_set_pre(void* p, oop v) { |
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451 // This barrier used by G1, where it's used remember the old oop values, |
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452 // so that we don't forget any objects that were live at the snapshot at |
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453 // the beginning. This function is only used when we write oops into |
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454 // Klasses. Since the Klasses are used as roots in G1, we don't have to |
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455 // do anything here. |
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456 } |
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457 |
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458 void Klass::klass_oop_store(oop* p, oop v) { |
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459 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
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460 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
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461 |
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462 // do the store |
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463 if (always_do_update_barrier) { |
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464 klass_oop_store((volatile oop*)p, v); |
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465 } else { |
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466 klass_update_barrier_set_pre((void*)p, v); |
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467 *p = v; |
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468 klass_update_barrier_set(v); |
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469 } |
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470 } |
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471 |
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472 void Klass::klass_oop_store(volatile oop* p, oop v) { |
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473 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
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474 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
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475 |
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476 klass_update_barrier_set_pre((void*)p, v); |
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477 OrderAccess::release_store_ptr(p, v); |
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478 klass_update_barrier_set(v); |
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479 } |
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480 |
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481 void Klass::oops_do(OopClosure* cl) { |
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482 cl->do_oop(&_java_mirror); |
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483 } |
0 | 484 |
485 void Klass::remove_unshareable_info() { | |
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486 if (!DumpSharedSpaces) { |
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487 // Clean up after OOM during class loading |
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488 if (class_loader_data() != NULL) { |
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489 class_loader_data()->remove_class(this); |
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490 } |
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491 } |
0 | 492 set_subklass(NULL); |
493 set_next_sibling(NULL); | |
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494 // Clear the java mirror |
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495 set_java_mirror(NULL); |
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496 set_next_link(NULL); |
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497 |
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498 // Null out class_loader_data because we don't share that yet. |
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499 set_class_loader_data(NULL); |
0 | 500 } |
501 | |
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502 void Klass::restore_unshareable_info(TRAPS) { |
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503 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
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504 // Restore class_loader_data to the null class loader data |
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505 set_class_loader_data(loader_data); |
0 | 506 |
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507 // Add to null class loader list first before creating the mirror |
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508 // (same order as class file parsing) |
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509 loader_data->add_class(this); |
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510 |
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511 // Recreate the class mirror. The protection_domain is always null for |
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512 // boot loader, for now. |
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513 java_lang_Class::create_mirror(this, Handle(NULL), CHECK); |
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514 } |
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515 |
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516 Klass* Klass::array_klass_or_null(int rank) { |
0 | 517 EXCEPTION_MARK; |
518 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
519 // (In anycase, the execption mark will fail if it do so) | |
520 return array_klass_impl(true, rank, THREAD); | |
521 } | |
522 | |
523 | |
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524 Klass* Klass::array_klass_or_null() { |
0 | 525 EXCEPTION_MARK; |
526 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
527 // (In anycase, the execption mark will fail if it do so) | |
528 return array_klass_impl(true, THREAD); | |
529 } | |
530 | |
531 | |
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532 Klass* Klass::array_klass_impl(bool or_null, int rank, TRAPS) { |
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533 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
0 | 534 return NULL; |
535 } | |
536 | |
537 | |
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538 Klass* Klass::array_klass_impl(bool or_null, TRAPS) { |
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539 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
0 | 540 return NULL; |
541 } | |
542 | |
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543 oop Klass::class_loader() const { return class_loader_data()->class_loader(); } |
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544 |
0 | 545 const char* Klass::external_name() const { |
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546 if (oop_is_instance()) { |
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547 InstanceKlass* ik = (InstanceKlass*) this; |
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548 if (ik->is_anonymous()) { |
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549 assert(EnableInvokeDynamic, ""); |
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550 intptr_t hash = 0; |
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551 if (ik->java_mirror() != NULL) { |
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552 // java_mirror might not be created yet, return 0 as hash. |
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553 hash = ik->java_mirror()->identity_hash(); |
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554 } |
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555 char hash_buf[40]; |
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556 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash); |
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557 size_t hash_len = strlen(hash_buf); |
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558 |
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559 size_t result_len = name()->utf8_length(); |
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560 char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1); |
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561 name()->as_klass_external_name(result, (int) result_len + 1); |
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562 assert(strlen(result) == result_len, ""); |
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563 strcpy(result + result_len, hash_buf); |
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564 assert(strlen(result) == result_len + hash_len, ""); |
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565 return result; |
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566 } |
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567 } |
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568 if (name() == NULL) return "<unknown>"; |
0 | 569 return name()->as_klass_external_name(); |
570 } | |
571 | |
572 | |
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573 const char* Klass::signature_name() const { |
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574 if (name() == NULL) return "<unknown>"; |
0 | 575 return name()->as_C_string(); |
576 } | |
577 | |
578 // Unless overridden, modifier_flags is 0. | |
579 jint Klass::compute_modifier_flags(TRAPS) const { | |
580 return 0; | |
581 } | |
582 | |
583 int Klass::atomic_incr_biased_lock_revocation_count() { | |
584 return (int) Atomic::add(1, &_biased_lock_revocation_count); | |
585 } | |
586 | |
587 // Unless overridden, jvmti_class_status has no flags set. | |
588 jint Klass::jvmti_class_status() const { | |
589 return 0; | |
590 } | |
591 | |
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592 |
0 | 593 // Printing |
594 | |
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595 void Klass::print_on(outputStream* st) const { |
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596 ResourceMark rm; |
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597 // print title |
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598 st->print("%s", internal_name()); |
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599 print_address_on(st); |
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600 st->cr(); |
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601 } |
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602 |
0 | 603 void Klass::oop_print_on(oop obj, outputStream* st) { |
604 ResourceMark rm; | |
605 // print title | |
606 st->print_cr("%s ", internal_name()); | |
607 obj->print_address_on(st); | |
608 | |
609 if (WizardMode) { | |
610 // print header | |
611 obj->mark()->print_on(st); | |
612 } | |
613 | |
614 // print class | |
615 st->print(" - klass: "); | |
616 obj->klass()->print_value_on(st); | |
617 st->cr(); | |
618 } | |
619 | |
620 void Klass::oop_print_value_on(oop obj, outputStream* st) { | |
621 // print title | |
622 ResourceMark rm; // Cannot print in debug mode without this | |
623 st->print("%s", internal_name()); | |
624 obj->print_address_on(st); | |
625 } | |
626 | |
7956 | 627 #if INCLUDE_SERVICES |
628 // Size Statistics | |
629 void Klass::collect_statistics(KlassSizeStats *sz) const { | |
630 sz->_klass_bytes = sz->count(this); | |
631 sz->_mirror_bytes = sz->count(java_mirror()); | |
632 sz->_secondary_supers_bytes = sz->count_array(secondary_supers()); | |
633 | |
634 sz->_ro_bytes += sz->_secondary_supers_bytes; | |
635 sz->_rw_bytes += sz->_klass_bytes + sz->_mirror_bytes; | |
636 } | |
637 #endif // INCLUDE_SERVICES | |
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638 |
0 | 639 // Verification |
640 | |
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641 void Klass::verify_on(outputStream* st) { |
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642 |
11034 | 643 // This can be expensive, but it is worth checking that this klass is actually |
644 // in the CLD graph but not in production. | |
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645 assert(ClassLoaderDataGraph::contains((address)this), "Should be"); |
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646 |
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647 guarantee(this->is_klass(),"should be klass"); |
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648 |
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649 if (super() != NULL) { |
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650 guarantee(super()->is_klass(), "should be klass"); |
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651 } |
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652 if (secondary_super_cache() != NULL) { |
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653 Klass* ko = secondary_super_cache(); |
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654 guarantee(ko->is_klass(), "should be klass"); |
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655 } |
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656 for ( uint i = 0; i < primary_super_limit(); i++ ) { |
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657 Klass* ko = _primary_supers[i]; |
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658 if (ko != NULL) { |
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659 guarantee(ko->is_klass(), "should be klass"); |
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660 } |
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661 } |
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662 |
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663 if (java_mirror() != NULL) { |
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664 guarantee(java_mirror()->is_oop(), "should be instance"); |
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665 } |
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666 } |
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667 |
0 | 668 void Klass::oop_verify_on(oop obj, outputStream* st) { |
669 guarantee(obj->is_oop(), "should be oop"); | |
670 guarantee(obj->klass()->is_klass(), "klass field is not a klass"); | |
671 } | |
672 | |
673 #ifndef PRODUCT | |
674 | |
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675 bool Klass::verify_vtable_index(int i) { |
0 | 676 if (oop_is_instance()) { |
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677 int limit = ((InstanceKlass*)this)->vtable_length()/vtableEntry::size(); |
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678 assert(i >= 0 && i < limit, err_msg("index %d out of bounds %d", i, limit)); |
0 | 679 } else { |
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680 assert(oop_is_array(), "Must be"); |
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681 int limit = ((ArrayKlass*)this)->vtable_length()/vtableEntry::size(); |
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682 assert(i >= 0 && i < limit, err_msg("index %d out of bounds %d", i, limit)); |
0 | 683 } |
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684 return true; |
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685 } |
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686 |
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687 bool Klass::verify_itable_index(int i) { |
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688 assert(oop_is_instance(), ""); |
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689 int method_count = klassItable::method_count_for_interface(this); |
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690 assert(i >= 0 && i < method_count, "index out of bounds"); |
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691 return true; |
0 | 692 } |
693 | |
694 #endif | |
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695 |
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696 /////////////// Unit tests /////////////// |
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697 |
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698 #ifndef PRODUCT |
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699 |
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700 class TestKlass { |
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701 public: |
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702 static void test_oop_is_instanceClassLoader() { |
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703 assert(SystemDictionary::ClassLoader_klass()->oop_is_instanceClassLoader(), "assert"); |
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704 assert(!SystemDictionary::String_klass()->oop_is_instanceClassLoader(), "assert"); |
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705 } |
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706 }; |
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707 |
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708 void TestKlass_test() { |
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709 TestKlass::test_oop_is_instanceClassLoader(); |
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710 } |
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711 |
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712 #endif |