Mercurial > hg > truffle
annotate src/share/vm/oops/klass.cpp @ 7956:16fb9f942703
6479360: PrintClassHistogram improvements
Summary: jcmd <pid> GC.class_stats (UnlockDiagnosticVMOptions)
Reviewed-by: coleenp, hseigel, sla, acorn
Contributed-by: ioi.lam@oracle.com
author | acorn |
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date | Fri, 25 Jan 2013 15:06:18 -0500 |
parents | 90273fc0a981 |
children | 3c9bc17b9403 |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 1997, 2013, 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 * | |
1552
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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" | |
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40 #include "utilities/stack.hpp" |
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41 #ifndef SERIALGC |
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42 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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43 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
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44 #include "gc_implementation/parallelScavenge/psScavenge.hpp" |
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45 #endif |
0 | 46 |
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47 void Klass::set_name(Symbol* n) { |
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48 _name = n; |
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49 if (_name != NULL) _name->increment_refcount(); |
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50 } |
0 | 51 |
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52 bool Klass::is_subclass_of(Klass* k) const { |
0 | 53 // Run up the super chain and check |
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54 if (this == k) return true; |
0 | 55 |
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56 Klass* t = const_cast<Klass*>(this)->super(); |
0 | 57 |
58 while (t != NULL) { | |
59 if (t == k) return true; | |
6983 | 60 t = t->super(); |
0 | 61 } |
62 return false; | |
63 } | |
64 | |
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65 bool Klass::search_secondary_supers(Klass* k) const { |
0 | 66 // Put some extra logic here out-of-line, before the search proper. |
67 // This cuts down the size of the inline method. | |
68 | |
69 // This is necessary, since I am never in my own secondary_super list. | |
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70 if (this == k) |
0 | 71 return true; |
72 // Scan the array-of-objects for a match | |
73 int cnt = secondary_supers()->length(); | |
74 for (int i = 0; i < cnt; i++) { | |
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75 if (secondary_supers()->at(i) == k) { |
0 | 76 ((Klass*)this)->set_secondary_super_cache(k); |
77 return true; | |
78 } | |
79 } | |
80 return false; | |
81 } | |
82 | |
83 // Return self, except for abstract classes with exactly 1 | |
84 // implementor. Then return the 1 concrete implementation. | |
85 Klass *Klass::up_cast_abstract() { | |
86 Klass *r = this; | |
87 while( r->is_abstract() ) { // Receiver is abstract? | |
88 Klass *s = r->subklass(); // Check for exactly 1 subklass | |
89 if( !s || s->next_sibling() ) // Oops; wrong count; give up | |
90 return this; // Return 'this' as a no-progress flag | |
91 r = s; // Loop till find concrete class | |
92 } | |
93 return r; // Return the 1 concrete class | |
94 } | |
95 | |
605 | 96 // Find LCA in class hierarchy |
0 | 97 Klass *Klass::LCA( Klass *k2 ) { |
98 Klass *k1 = this; | |
99 while( 1 ) { | |
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100 if( k1->is_subtype_of(k2) ) return k2; |
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101 if( k2->is_subtype_of(k1) ) return k1; |
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102 k1 = k1->super(); |
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103 k2 = k2->super(); |
0 | 104 } |
105 } | |
106 | |
107 | |
108 void Klass::check_valid_for_instantiation(bool throwError, TRAPS) { | |
109 ResourceMark rm(THREAD); | |
110 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
111 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
112 } | |
113 | |
114 | |
115 void Klass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) { | |
116 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
117 } | |
118 | |
119 | |
120 void Klass::initialize(TRAPS) { | |
121 ShouldNotReachHere(); | |
122 } | |
123 | |
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124 bool Klass::compute_is_subtype_of(Klass* k) { |
0 | 125 assert(k->is_klass(), "argument must be a class"); |
126 return is_subclass_of(k); | |
127 } | |
128 | |
129 | |
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130 Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
0 | 131 #ifdef ASSERT |
132 tty->print_cr("Error: uncached_lookup_method called on a klass oop." | |
133 " Likely error: reflection method does not correctly" | |
134 " wrap return value in a mirror object."); | |
135 #endif | |
136 ShouldNotReachHere(); | |
137 return NULL; | |
138 } | |
139 | |
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140 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) { |
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141 return Metaspace::allocate(loader_data, word_size, /*read_only*/false, |
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142 Metaspace::ClassType, CHECK_NULL); |
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143 } |
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144 |
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145 Klass::Klass() { |
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146 Klass* k = this; |
0 | 147 |
148 { // Preinitialize supertype information. | |
149 // A later call to initialize_supers() may update these settings: | |
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150 set_super(NULL); |
0 | 151 for (juint i = 0; i < Klass::primary_super_limit(); i++) { |
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152 _primary_supers[i] = NULL; |
0 | 153 } |
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154 set_secondary_supers(NULL); |
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155 _primary_supers[0] = k; |
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156 set_super_check_offset(in_bytes(primary_supers_offset())); |
0 | 157 } |
158 | |
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159 set_java_mirror(NULL); |
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160 set_modifier_flags(0); |
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161 set_layout_helper(Klass::_lh_neutral_value); |
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162 set_name(NULL); |
0 | 163 AccessFlags af; |
164 af.set_flags(0); | |
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165 set_access_flags(af); |
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166 set_subklass(NULL); |
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167 set_next_sibling(NULL); |
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168 set_next_link(NULL); |
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169 set_alloc_count(0); |
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170 TRACE_SET_KLASS_TRACE_ID(this, 0); |
0 | 171 |
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172 set_prototype_header(markOopDesc::prototype()); |
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173 set_biased_lock_revocation_count(0); |
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174 set_last_biased_lock_bulk_revocation_time(0); |
0 | 175 |
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176 // The klass doesn't have any references at this point. |
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177 clear_modified_oops(); |
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178 clear_accumulated_modified_oops(); |
0 | 179 } |
180 | |
181 jint Klass::array_layout_helper(BasicType etype) { | |
182 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype"); | |
183 // Note that T_ARRAY is not allowed here. | |
184 int hsize = arrayOopDesc::base_offset_in_bytes(etype); | |
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185 int esize = type2aelembytes(etype); |
0 | 186 bool isobj = (etype == T_OBJECT); |
187 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value; | |
188 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize)); | |
189 | |
190 assert(lh < (int)_lh_neutral_value, "must look like an array layout"); | |
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191 assert(layout_helper_is_array(lh), "correct kind"); |
0 | 192 assert(layout_helper_is_objArray(lh) == isobj, "correct kind"); |
193 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind"); | |
194 assert(layout_helper_header_size(lh) == hsize, "correct decode"); | |
195 assert(layout_helper_element_type(lh) == etype, "correct decode"); | |
196 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode"); | |
197 | |
198 return lh; | |
199 } | |
200 | |
201 bool Klass::can_be_primary_super_slow() const { | |
202 if (super() == NULL) | |
203 return true; | |
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204 else if (super()->super_depth() >= primary_super_limit()-1) |
0 | 205 return false; |
206 else | |
207 return true; | |
208 } | |
209 | |
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210 void Klass::initialize_supers(Klass* k, TRAPS) { |
0 | 211 if (FastSuperclassLimit == 0) { |
212 // None of the other machinery matters. | |
213 set_super(k); | |
214 return; | |
215 } | |
216 if (k == NULL) { | |
217 set_super(NULL); | |
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218 _primary_supers[0] = this; |
0 | 219 assert(super_depth() == 0, "Object must already be initialized properly"); |
1142 | 220 } else if (k != super() || k == SystemDictionary::Object_klass()) { |
221 assert(super() == NULL || super() == SystemDictionary::Object_klass(), | |
0 | 222 "initialize this only once to a non-trivial value"); |
223 set_super(k); | |
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224 Klass* sup = k; |
0 | 225 int sup_depth = sup->super_depth(); |
226 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit()); | |
227 if (!can_be_primary_super_slow()) | |
228 my_depth = primary_super_limit(); | |
229 for (juint i = 0; i < my_depth; i++) { | |
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230 _primary_supers[i] = sup->_primary_supers[i]; |
0 | 231 } |
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232 Klass* *super_check_cell; |
0 | 233 if (my_depth < primary_super_limit()) { |
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234 _primary_supers[my_depth] = this; |
0 | 235 super_check_cell = &_primary_supers[my_depth]; |
236 } else { | |
237 // Overflow of the primary_supers array forces me to be secondary. | |
238 super_check_cell = &_secondary_super_cache; | |
239 } | |
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240 set_super_check_offset((address)super_check_cell - (address) this); |
0 | 241 |
242 #ifdef ASSERT | |
243 { | |
244 juint j = super_depth(); | |
245 assert(j == my_depth, "computed accessor gets right answer"); | |
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246 Klass* t = this; |
6983 | 247 while (!t->can_be_primary_super()) { |
248 t = t->super(); | |
249 j = t->super_depth(); | |
0 | 250 } |
251 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) { | |
252 assert(primary_super_of_depth(j1) == NULL, "super list padding"); | |
253 } | |
254 while (t != NULL) { | |
255 assert(primary_super_of_depth(j) == t, "super list initialization"); | |
6983 | 256 t = t->super(); |
0 | 257 --j; |
258 } | |
259 assert(j == (juint)-1, "correct depth count"); | |
260 } | |
261 #endif | |
262 } | |
263 | |
264 if (secondary_supers() == NULL) { | |
265 KlassHandle this_kh (THREAD, this); | |
266 | |
267 // Now compute the list of secondary supertypes. | |
268 // Secondaries can occasionally be on the super chain, | |
269 // if the inline "_primary_supers" array overflows. | |
270 int extras = 0; | |
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271 Klass* p; |
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272 for (p = super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 273 ++extras; |
274 } | |
275 | |
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276 ResourceMark rm(THREAD); // need to reclaim GrowableArrays allocated below |
0 | 277 |
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278 // Compute the "real" non-extra secondaries. |
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279 GrowableArray<Klass*>* secondaries = compute_secondary_supers(extras); |
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280 if (secondaries == NULL) { |
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281 // secondary_supers set by compute_secondary_supers |
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282 return; |
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283 } |
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284 |
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285 GrowableArray<Klass*>* primaries = new GrowableArray<Klass*>(extras); |
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286 |
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287 for (p = this_kh->super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 288 int i; // Scan for overflow primaries being duplicates of 2nd'arys |
289 | |
290 // This happens frequently for very deeply nested arrays: the | |
291 // primary superclass chain overflows into the secondary. The | |
292 // secondary list contains the element_klass's secondaries with | |
293 // an extra array dimension added. If the element_klass's | |
294 // secondary list already contains some primary overflows, they | |
295 // (with the extra level of array-ness) will collide with the | |
296 // normal primary superclass overflows. | |
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297 for( i = 0; i < secondaries->length(); i++ ) { |
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298 if( secondaries->at(i) == p ) |
0 | 299 break; |
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300 } |
0 | 301 if( i < secondaries->length() ) |
302 continue; // It's a dup, don't put it in | |
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303 primaries->push(p); |
0 | 304 } |
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305 // Combine the two arrays into a metadata object to pack the array. |
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306 // The primaries are added in the reverse order, then the secondaries. |
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307 int new_length = primaries->length() + secondaries->length(); |
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308 Array<Klass*>* s2 = MetadataFactory::new_array<Klass*>( |
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309 class_loader_data(), new_length, CHECK); |
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310 int fill_p = primaries->length(); |
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311 for (int j = 0; j < fill_p; j++) { |
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312 s2->at_put(j, primaries->pop()); // add primaries in reverse order. |
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313 } |
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314 for( int j = 0; j < secondaries->length(); j++ ) { |
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315 s2->at_put(j+fill_p, secondaries->at(j)); // add secondaries on the end. |
0 | 316 } |
317 | |
318 #ifdef ASSERT | |
319 // We must not copy any NULL placeholders left over from bootstrap. | |
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320 for (int j = 0; j < s2->length(); j++) { |
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321 assert(s2->at(j) != NULL, "correct bootstrapping order"); |
0 | 322 } |
323 #endif | |
324 | |
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325 this_kh->set_secondary_supers(s2); |
0 | 326 } |
327 } | |
328 | |
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329 GrowableArray<Klass*>* Klass::compute_secondary_supers(int num_extra_slots) { |
0 | 330 assert(num_extra_slots == 0, "override for complex klasses"); |
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331 set_secondary_supers(Universe::the_empty_klass_array()); |
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332 return NULL; |
0 | 333 } |
334 | |
335 | |
336 Klass* Klass::subklass() const { | |
6983 | 337 return _subklass == NULL ? NULL : _subklass; |
0 | 338 } |
339 | |
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340 InstanceKlass* Klass::superklass() const { |
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341 assert(super() == NULL || super()->oop_is_instance(), "must be instance klass"); |
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342 return _super == NULL ? NULL : InstanceKlass::cast(_super); |
0 | 343 } |
344 | |
345 Klass* Klass::next_sibling() const { | |
6983 | 346 return _next_sibling == NULL ? NULL : _next_sibling; |
0 | 347 } |
348 | |
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349 void Klass::set_subklass(Klass* s) { |
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350 assert(s != this, "sanity check"); |
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351 _subklass = s; |
0 | 352 } |
353 | |
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354 void Klass::set_next_sibling(Klass* s) { |
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355 assert(s != this, "sanity check"); |
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356 _next_sibling = s; |
0 | 357 } |
358 | |
359 void Klass::append_to_sibling_list() { | |
6867 | 360 debug_only(verify();) |
0 | 361 // add ourselves to superklass' subklass list |
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362 InstanceKlass* super = superklass(); |
0 | 363 if (super == NULL) return; // special case: class Object |
6867 | 364 assert((!super->is_interface() // interfaces cannot be supers |
0 | 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); |
6867 | 374 debug_only(verify();) |
0 | 375 } |
376 | |
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377 bool Klass::is_loader_alive(BoolObjectClosure* is_alive) { |
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378 assert(is_metadata(), "p is not meta-data"); |
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379 assert(ClassLoaderDataGraph::contains((address)this), "is in the metaspace"); |
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380 |
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381 #ifdef ASSERT |
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382 // The class is alive iff the class loader is alive. |
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383 oop loader = class_loader(); |
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384 bool loader_alive = (loader == NULL) || is_alive->do_object_b(loader); |
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385 #endif // ASSERT |
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386 |
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387 // The class is alive if it's mirror is alive (which should be marked if the |
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388 // loader is alive) unless it's an anoymous class. |
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389 bool mirror_alive = is_alive->do_object_b(java_mirror()); |
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390 assert(!mirror_alive || loader_alive, "loader must be alive if the mirror is" |
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391 " but not the other way around with anonymous classes"); |
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392 return mirror_alive; |
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393 } |
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394 |
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395 void Klass::clean_weak_klass_links(BoolObjectClosure* is_alive) { |
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396 if (!ClassUnloading) { |
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397 return; |
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398 } |
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399 |
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400 Klass* root = SystemDictionary::Object_klass(); |
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401 Stack<Klass*, mtGC> stack; |
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402 |
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403 stack.push(root); |
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404 while (!stack.is_empty()) { |
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405 Klass* current = stack.pop(); |
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406 |
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407 assert(current->is_loader_alive(is_alive), "just checking, this should be live"); |
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408 |
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409 // Find and set the first alive subklass |
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410 Klass* sub = current->subklass_oop(); |
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411 while (sub != NULL && !sub->is_loader_alive(is_alive)) { |
0 | 412 #ifndef PRODUCT |
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413 if (TraceClassUnloading && WizardMode) { |
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414 ResourceMark rm; |
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415 tty->print_cr("[Unlinking class (subclass) %s]", sub->external_name()); |
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416 } |
0 | 417 #endif |
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418 sub = sub->next_sibling_oop(); |
0 | 419 } |
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420 current->set_subklass(sub); |
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421 if (sub != NULL) { |
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422 stack.push(sub); |
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423 } |
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424 |
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425 // Find and set the first alive sibling |
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426 Klass* sibling = current->next_sibling_oop(); |
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427 while (sibling != NULL && !sibling->is_loader_alive(is_alive)) { |
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428 if (TraceClassUnloading && WizardMode) { |
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429 ResourceMark rm; |
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430 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name()); |
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431 } |
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432 sibling = sibling->next_sibling_oop(); |
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433 } |
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434 current->set_next_sibling(sibling); |
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435 if (sibling != NULL) { |
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436 stack.push(sibling); |
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437 } |
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438 |
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439 // Clean the implementors list and method data. |
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440 if (current->oop_is_instance()) { |
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441 InstanceKlass* ik = InstanceKlass::cast(current); |
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442 ik->clean_implementors_list(is_alive); |
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443 ik->clean_method_data(is_alive); |
0 | 444 } |
445 } | |
446 } | |
447 | |
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448 void Klass::klass_update_barrier_set(oop v) { |
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449 record_modified_oops(); |
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450 } |
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451 |
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452 void Klass::klass_update_barrier_set_pre(void* p, oop v) { |
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453 // This barrier used by G1, where it's used remember the old oop values, |
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454 // so that we don't forget any objects that were live at the snapshot at |
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455 // the beginning. This function is only used when we write oops into |
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456 // Klasses. Since the Klasses are used as roots in G1, we don't have to |
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457 // do anything here. |
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458 } |
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459 |
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460 void Klass::klass_oop_store(oop* p, oop v) { |
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461 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
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462 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
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463 |
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464 // do the store |
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465 if (always_do_update_barrier) { |
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466 klass_oop_store((volatile oop*)p, v); |
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467 } else { |
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468 klass_update_barrier_set_pre((void*)p, v); |
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469 *p = v; |
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470 klass_update_barrier_set(v); |
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471 } |
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472 } |
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473 |
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474 void Klass::klass_oop_store(volatile oop* p, oop v) { |
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475 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
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476 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
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477 |
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478 klass_update_barrier_set_pre((void*)p, v); |
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479 OrderAccess::release_store_ptr(p, v); |
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480 klass_update_barrier_set(v); |
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481 } |
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482 |
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483 void Klass::oops_do(OopClosure* cl) { |
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484 cl->do_oop(&_java_mirror); |
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485 } |
0 | 486 |
487 void Klass::remove_unshareable_info() { | |
488 set_subklass(NULL); | |
489 set_next_sibling(NULL); | |
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490 // Clear the java mirror |
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491 set_java_mirror(NULL); |
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492 set_next_link(NULL); |
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493 |
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494 // Null out class_loader_data because we don't share that yet. |
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495 set_class_loader_data(NULL); |
0 | 496 } |
497 | |
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498 void Klass::restore_unshareable_info(TRAPS) { |
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499 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
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500 // Restore class_loader_data to the null class loader data |
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501 set_class_loader_data(loader_data); |
0 | 502 |
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503 // Add to null class loader list first before creating the mirror |
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504 // (same order as class file parsing) |
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505 loader_data->add_class(this); |
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506 |
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507 // Recreate the class mirror |
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508 java_lang_Class::create_mirror(this, CHECK); |
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509 } |
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510 |
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511 Klass* Klass::array_klass_or_null(int rank) { |
0 | 512 EXCEPTION_MARK; |
513 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
514 // (In anycase, the execption mark will fail if it do so) | |
515 return array_klass_impl(true, rank, THREAD); | |
516 } | |
517 | |
518 | |
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519 Klass* Klass::array_klass_or_null() { |
0 | 520 EXCEPTION_MARK; |
521 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
522 // (In anycase, the execption mark will fail if it do so) | |
523 return array_klass_impl(true, THREAD); | |
524 } | |
525 | |
526 | |
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527 Klass* Klass::array_klass_impl(bool or_null, int rank, TRAPS) { |
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528 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
0 | 529 return NULL; |
530 } | |
531 | |
532 | |
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533 Klass* Klass::array_klass_impl(bool or_null, TRAPS) { |
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534 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
0 | 535 return NULL; |
536 } | |
537 | |
538 | |
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539 void Klass::with_array_klasses_do(void f(Klass* k)) { |
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540 f(this); |
0 | 541 } |
542 | |
543 | |
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544 oop Klass::class_loader() const { return class_loader_data()->class_loader(); } |
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545 |
0 | 546 const char* Klass::external_name() const { |
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547 if (oop_is_instance()) { |
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548 InstanceKlass* ik = (InstanceKlass*) this; |
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549 if (ik->is_anonymous()) { |
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550 assert(EnableInvokeDynamic, ""); |
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551 intptr_t hash = 0; |
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552 if (ik->java_mirror() != NULL) { |
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553 // java_mirror might not be created yet, return 0 as hash. |
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554 hash = ik->java_mirror()->identity_hash(); |
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555 } |
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556 char hash_buf[40]; |
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557 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash); |
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558 size_t hash_len = strlen(hash_buf); |
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559 |
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560 size_t result_len = name()->utf8_length(); |
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561 char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1); |
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562 name()->as_klass_external_name(result, (int) result_len + 1); |
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563 assert(strlen(result) == result_len, ""); |
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564 strcpy(result + result_len, hash_buf); |
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565 assert(strlen(result) == result_len + hash_len, ""); |
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566 return result; |
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567 } |
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568 } |
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569 if (name() == NULL) return "<unknown>"; |
0 | 570 return name()->as_klass_external_name(); |
571 } | |
572 | |
573 | |
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574 const char* Klass::signature_name() const { |
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575 if (name() == NULL) return "<unknown>"; |
0 | 576 return name()->as_C_string(); |
577 } | |
578 | |
579 // Unless overridden, modifier_flags is 0. | |
580 jint Klass::compute_modifier_flags(TRAPS) const { | |
581 return 0; | |
582 } | |
583 | |
584 int Klass::atomic_incr_biased_lock_revocation_count() { | |
585 return (int) Atomic::add(1, &_biased_lock_revocation_count); | |
586 } | |
587 | |
588 // Unless overridden, jvmti_class_status has no flags set. | |
589 jint Klass::jvmti_class_status() const { | |
590 return 0; | |
591 } | |
592 | |
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593 |
0 | 594 // Printing |
595 | |
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596 void Klass::print_on(outputStream* st) const { |
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597 ResourceMark rm; |
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598 // print title |
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599 st->print("%s", internal_name()); |
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600 print_address_on(st); |
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601 st->cr(); |
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602 } |
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603 |
0 | 604 void Klass::oop_print_on(oop obj, outputStream* st) { |
605 ResourceMark rm; | |
606 // print title | |
607 st->print_cr("%s ", internal_name()); | |
608 obj->print_address_on(st); | |
609 | |
610 if (WizardMode) { | |
611 // print header | |
612 obj->mark()->print_on(st); | |
613 } | |
614 | |
615 // print class | |
616 st->print(" - klass: "); | |
617 obj->klass()->print_value_on(st); | |
618 st->cr(); | |
619 } | |
620 | |
621 void Klass::oop_print_value_on(oop obj, outputStream* st) { | |
622 // print title | |
623 ResourceMark rm; // Cannot print in debug mode without this | |
624 st->print("%s", internal_name()); | |
625 obj->print_address_on(st); | |
626 } | |
627 | |
7956 | 628 #if INCLUDE_SERVICES |
629 // Size Statistics | |
630 void Klass::collect_statistics(KlassSizeStats *sz) const { | |
631 sz->_klass_bytes = sz->count(this); | |
632 sz->_mirror_bytes = sz->count(java_mirror()); | |
633 sz->_secondary_supers_bytes = sz->count_array(secondary_supers()); | |
634 | |
635 sz->_ro_bytes += sz->_secondary_supers_bytes; | |
636 sz->_rw_bytes += sz->_klass_bytes + sz->_mirror_bytes; | |
637 } | |
638 #endif // INCLUDE_SERVICES | |
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639 |
0 | 640 // Verification |
641 | |
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642 void Klass::verify_on(outputStream* st) { |
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643 guarantee(!Universe::heap()->is_in_reserved(this), "Shouldn't be"); |
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644 guarantee(this->is_metadata(), "should be in metaspace"); |
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645 |
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646 assert(ClassLoaderDataGraph::contains((address)this), "Should be"); |
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647 |
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648 guarantee(this->is_klass(),"should be klass"); |
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649 |
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650 if (super() != NULL) { |
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651 guarantee(super()->is_metadata(), "should be in metaspace"); |
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652 guarantee(super()->is_klass(), "should be klass"); |
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653 } |
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654 if (secondary_super_cache() != NULL) { |
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655 Klass* ko = secondary_super_cache(); |
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656 guarantee(ko->is_metadata(), "should be in metaspace"); |
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657 guarantee(ko->is_klass(), "should be klass"); |
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658 } |
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659 for ( uint i = 0; i < primary_super_limit(); i++ ) { |
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660 Klass* ko = _primary_supers[i]; |
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661 if (ko != NULL) { |
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662 guarantee(ko->is_metadata(), "should be in metaspace"); |
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663 guarantee(ko->is_klass(), "should be klass"); |
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664 } |
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665 } |
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666 |
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667 if (java_mirror() != NULL) { |
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668 guarantee(java_mirror()->is_oop(), "should be instance"); |
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669 } |
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670 } |
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671 |
0 | 672 void Klass::oop_verify_on(oop obj, outputStream* st) { |
673 guarantee(obj->is_oop(), "should be oop"); | |
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674 guarantee(obj->klass()->is_metadata(), "should not be in Java heap"); |
0 | 675 guarantee(obj->klass()->is_klass(), "klass field is not a klass"); |
676 } | |
677 | |
678 #ifndef PRODUCT | |
679 | |
680 void Klass::verify_vtable_index(int i) { | |
681 if (oop_is_instance()) { | |
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682 assert(i>=0 && i<((InstanceKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); |
0 | 683 } else { |
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684 assert(oop_is_array(), "Must be"); |
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685 assert(i>=0 && i<((ArrayKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); |
0 | 686 } |
687 } | |
688 | |
689 #endif |