Mercurial > hg > graal-compiler
annotate src/share/vm/oops/klass.cpp @ 21814:5f07d936a14e
8058982: Better verification of an exceptional invokespecial
Summary: Throw VerifyError for illegal accesses
Reviewed-by: acorn, ahgross, coleenp
author | hseigel |
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date | Mon, 20 Oct 2014 15:14:56 -0400 |
parents | 54bc75c144b0 |
children | eaf39a954227 8cb56c8cb30d |
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 | |
18046 | 131 Klass* Klass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
132 #ifdef ASSERT | |
133 tty->print_cr("Error: find_field called on a klass oop." | |
134 " Likely error: reflection method does not correctly" | |
135 " wrap return value in a mirror object."); | |
136 #endif | |
137 ShouldNotReachHere(); | |
138 return NULL; | |
139 } | |
0 | 140 |
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141 Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const { |
0 | 142 #ifdef ASSERT |
143 tty->print_cr("Error: uncached_lookup_method called on a klass oop." | |
144 " Likely error: reflection method does not correctly" | |
145 " wrap return value in a mirror object."); | |
146 #endif | |
147 ShouldNotReachHere(); | |
148 return NULL; | |
149 } | |
150 | |
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151 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() { |
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152 return Metaspace::allocate(loader_data, word_size, /*read_only*/false, |
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153 MetaspaceObj::ClassType, CHECK_NULL); |
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154 } |
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155 |
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156 Klass::Klass() { |
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157 Klass* k = this; |
0 | 158 |
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159 // Preinitialize supertype information. |
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160 // A later call to initialize_supers() may update these settings: |
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161 set_super(NULL); |
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162 for (juint i = 0; i < Klass::primary_super_limit(); i++) { |
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163 _primary_supers[i] = NULL; |
0 | 164 } |
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165 set_secondary_supers(NULL); |
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166 set_secondary_super_cache(NULL); |
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167 _primary_supers[0] = k; |
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168 set_super_check_offset(in_bytes(primary_supers_offset())); |
0 | 169 |
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170 set_java_mirror(NULL); |
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171 set_modifier_flags(0); |
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172 set_layout_helper(Klass::_lh_neutral_value); |
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173 set_name(NULL); |
0 | 174 AccessFlags af; |
175 af.set_flags(0); | |
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176 set_access_flags(af); |
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177 set_subklass(NULL); |
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178 set_next_sibling(NULL); |
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179 set_next_link(NULL); |
10405 | 180 TRACE_INIT_ID(this); |
0 | 181 |
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182 set_prototype_header(markOopDesc::prototype()); |
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183 set_biased_lock_revocation_count(0); |
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184 set_last_biased_lock_bulk_revocation_time(0); |
0 | 185 |
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186 // The klass doesn't have any references at this point. |
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187 clear_modified_oops(); |
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188 clear_accumulated_modified_oops(); |
0 | 189 } |
190 | |
191 jint Klass::array_layout_helper(BasicType etype) { | |
192 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype"); | |
193 // Note that T_ARRAY is not allowed here. | |
194 int hsize = arrayOopDesc::base_offset_in_bytes(etype); | |
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195 int esize = type2aelembytes(etype); |
0 | 196 bool isobj = (etype == T_OBJECT); |
197 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value; | |
198 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize)); | |
199 | |
200 assert(lh < (int)_lh_neutral_value, "must look like an array layout"); | |
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201 assert(layout_helper_is_array(lh), "correct kind"); |
0 | 202 assert(layout_helper_is_objArray(lh) == isobj, "correct kind"); |
203 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind"); | |
204 assert(layout_helper_header_size(lh) == hsize, "correct decode"); | |
205 assert(layout_helper_element_type(lh) == etype, "correct decode"); | |
206 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode"); | |
207 | |
208 return lh; | |
209 } | |
210 | |
211 bool Klass::can_be_primary_super_slow() const { | |
212 if (super() == NULL) | |
213 return true; | |
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214 else if (super()->super_depth() >= primary_super_limit()-1) |
0 | 215 return false; |
216 else | |
217 return true; | |
218 } | |
219 | |
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220 void Klass::initialize_supers(Klass* k, TRAPS) { |
0 | 221 if (FastSuperclassLimit == 0) { |
222 // None of the other machinery matters. | |
223 set_super(k); | |
224 return; | |
225 } | |
226 if (k == NULL) { | |
227 set_super(NULL); | |
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228 _primary_supers[0] = this; |
0 | 229 assert(super_depth() == 0, "Object must already be initialized properly"); |
1142 | 230 } else if (k != super() || k == SystemDictionary::Object_klass()) { |
231 assert(super() == NULL || super() == SystemDictionary::Object_klass(), | |
0 | 232 "initialize this only once to a non-trivial value"); |
233 set_super(k); | |
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234 Klass* sup = k; |
0 | 235 int sup_depth = sup->super_depth(); |
236 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit()); | |
237 if (!can_be_primary_super_slow()) | |
238 my_depth = primary_super_limit(); | |
239 for (juint i = 0; i < my_depth; i++) { | |
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240 _primary_supers[i] = sup->_primary_supers[i]; |
0 | 241 } |
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242 Klass* *super_check_cell; |
0 | 243 if (my_depth < primary_super_limit()) { |
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244 _primary_supers[my_depth] = this; |
0 | 245 super_check_cell = &_primary_supers[my_depth]; |
246 } else { | |
247 // Overflow of the primary_supers array forces me to be secondary. | |
248 super_check_cell = &_secondary_super_cache; | |
249 } | |
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250 set_super_check_offset((address)super_check_cell - (address) this); |
0 | 251 |
252 #ifdef ASSERT | |
253 { | |
254 juint j = super_depth(); | |
255 assert(j == my_depth, "computed accessor gets right answer"); | |
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256 Klass* t = this; |
6983 | 257 while (!t->can_be_primary_super()) { |
258 t = t->super(); | |
259 j = t->super_depth(); | |
0 | 260 } |
261 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) { | |
262 assert(primary_super_of_depth(j1) == NULL, "super list padding"); | |
263 } | |
264 while (t != NULL) { | |
265 assert(primary_super_of_depth(j) == t, "super list initialization"); | |
6983 | 266 t = t->super(); |
0 | 267 --j; |
268 } | |
269 assert(j == (juint)-1, "correct depth count"); | |
270 } | |
271 #endif | |
272 } | |
273 | |
274 if (secondary_supers() == NULL) { | |
275 KlassHandle this_kh (THREAD, this); | |
276 | |
277 // Now compute the list of secondary supertypes. | |
278 // Secondaries can occasionally be on the super chain, | |
279 // if the inline "_primary_supers" array overflows. | |
280 int extras = 0; | |
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281 Klass* p; |
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282 for (p = super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 283 ++extras; |
284 } | |
285 | |
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286 ResourceMark rm(THREAD); // need to reclaim GrowableArrays allocated below |
0 | 287 |
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288 // Compute the "real" non-extra secondaries. |
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289 GrowableArray<Klass*>* secondaries = compute_secondary_supers(extras); |
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290 if (secondaries == NULL) { |
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291 // secondary_supers set by compute_secondary_supers |
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292 return; |
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293 } |
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294 |
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295 GrowableArray<Klass*>* primaries = new GrowableArray<Klass*>(extras); |
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296 |
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297 for (p = this_kh->super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
0 | 298 int i; // Scan for overflow primaries being duplicates of 2nd'arys |
299 | |
300 // This happens frequently for very deeply nested arrays: the | |
301 // primary superclass chain overflows into the secondary. The | |
302 // secondary list contains the element_klass's secondaries with | |
303 // an extra array dimension added. If the element_klass's | |
304 // secondary list already contains some primary overflows, they | |
305 // (with the extra level of array-ness) will collide with the | |
306 // normal primary superclass overflows. | |
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307 for( i = 0; i < secondaries->length(); i++ ) { |
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308 if( secondaries->at(i) == p ) |
0 | 309 break; |
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310 } |
0 | 311 if( i < secondaries->length() ) |
312 continue; // It's a dup, don't put it in | |
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313 primaries->push(p); |
0 | 314 } |
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315 // Combine the two arrays into a metadata object to pack the array. |
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316 // The primaries are added in the reverse order, then the secondaries. |
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317 int new_length = primaries->length() + secondaries->length(); |
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318 Array<Klass*>* s2 = MetadataFactory::new_array<Klass*>( |
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319 class_loader_data(), new_length, CHECK); |
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320 int fill_p = primaries->length(); |
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321 for (int j = 0; j < fill_p; j++) { |
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322 s2->at_put(j, primaries->pop()); // add primaries in reverse order. |
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323 } |
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324 for( int j = 0; j < secondaries->length(); j++ ) { |
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325 s2->at_put(j+fill_p, secondaries->at(j)); // add secondaries on the end. |
0 | 326 } |
327 | |
328 #ifdef ASSERT | |
329 // We must not copy any NULL placeholders left over from bootstrap. | |
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330 for (int j = 0; j < s2->length(); j++) { |
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331 assert(s2->at(j) != NULL, "correct bootstrapping order"); |
0 | 332 } |
333 #endif | |
334 | |
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335 this_kh->set_secondary_supers(s2); |
0 | 336 } |
337 } | |
338 | |
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339 GrowableArray<Klass*>* Klass::compute_secondary_supers(int num_extra_slots) { |
0 | 340 assert(num_extra_slots == 0, "override for complex klasses"); |
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341 set_secondary_supers(Universe::the_empty_klass_array()); |
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342 return NULL; |
0 | 343 } |
344 | |
345 | |
346 Klass* Klass::subklass() const { | |
6983 | 347 return _subklass == NULL ? NULL : _subklass; |
0 | 348 } |
349 | |
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350 InstanceKlass* Klass::superklass() const { |
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351 assert(super() == NULL || super()->oop_is_instance(), "must be instance klass"); |
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352 return _super == NULL ? NULL : InstanceKlass::cast(_super); |
0 | 353 } |
354 | |
355 Klass* Klass::next_sibling() const { | |
6983 | 356 return _next_sibling == NULL ? NULL : _next_sibling; |
0 | 357 } |
358 | |
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359 void Klass::set_subklass(Klass* s) { |
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360 assert(s != this, "sanity check"); |
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361 _subklass = s; |
0 | 362 } |
363 | |
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364 void Klass::set_next_sibling(Klass* s) { |
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365 assert(s != this, "sanity check"); |
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366 _next_sibling = s; |
0 | 367 } |
368 | |
369 void Klass::append_to_sibling_list() { | |
6867 | 370 debug_only(verify();) |
0 | 371 // add ourselves to superklass' subklass list |
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372 InstanceKlass* super = superklass(); |
0 | 373 if (super == NULL) return; // special case: class Object |
6867 | 374 assert((!super->is_interface() // interfaces cannot be supers |
0 | 375 && (super->superklass() == NULL || !is_interface())), |
376 "an interface can only be a subklass of Object"); | |
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377 Klass* prev_first_subklass = super->subklass_oop(); |
0 | 378 if (prev_first_subklass != NULL) { |
379 // set our sibling to be the superklass' previous first subklass | |
380 set_next_sibling(prev_first_subklass); | |
381 } | |
382 // make ourselves the superklass' first subklass | |
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383 super->set_subklass(this); |
6867 | 384 debug_only(verify();) |
0 | 385 } |
386 | |
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387 bool Klass::is_loader_alive(BoolObjectClosure* is_alive) { |
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388 #ifdef ASSERT |
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389 // The class is alive iff the class loader is alive. |
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390 oop loader = class_loader(); |
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391 bool loader_alive = (loader == NULL) || is_alive->do_object_b(loader); |
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392 #endif // ASSERT |
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393 |
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394 // The class is alive if it's mirror is alive (which should be marked if the |
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395 // loader is alive) unless it's an anoymous class. |
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396 bool mirror_alive = is_alive->do_object_b(java_mirror()); |
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397 assert(!mirror_alive || loader_alive, "loader must be alive if the mirror is" |
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398 " but not the other way around with anonymous classes"); |
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399 return mirror_alive; |
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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 |
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420 if (TraceClassUnloading && WizardMode) { |
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421 ResourceMark rm; |
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422 tty->print_cr("[Unlinking class (subclass) %s]", sub->external_name()); |
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423 } |
0 | 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)) { |
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435 if (TraceClassUnloading && WizardMode) { |
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436 ResourceMark rm; |
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437 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name()); |
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438 } |
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439 sibling = sibling->next_sibling_oop(); |
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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() { | |
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495 assert (DumpSharedSpaces, "only called for DumpSharedSpaces"); |
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496 |
0 | 497 set_subklass(NULL); |
498 set_next_sibling(NULL); | |
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499 // Clear the java mirror |
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500 set_java_mirror(NULL); |
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501 set_next_link(NULL); |
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502 |
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503 // Null out class_loader_data because we don't share that yet. |
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504 set_class_loader_data(NULL); |
0 | 505 } |
506 | |
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507 void Klass::restore_unshareable_info(TRAPS) { |
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508 TRACE_INIT_ID(this); |
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509 // If an exception happened during CDS restore, some of these fields may already be |
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510 // set. We leave the class on the CLD list, even if incomplete so that we don't |
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511 // modify the CLD list outside a safepoint. |
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512 if (class_loader_data() == NULL) { |
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513 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
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514 // Restore class_loader_data to the null class loader data |
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515 set_class_loader_data(loader_data); |
0 | 516 |
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517 // Add to null class loader list first before creating the mirror |
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518 // (same order as class file parsing) |
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519 loader_data->add_class(this); |
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520 } |
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521 |
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522 // Recreate the class mirror. The protection_domain is always null for |
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523 // boot loader, for now. |
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524 // Only recreate it if not present. A previous attempt to restore may have |
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525 // gotten an OOM later but keep the mirror if it was created. |
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526 if (java_mirror() == NULL) { |
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527 java_lang_Class::create_mirror(this, Handle(NULL), CHECK); |
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528 } |
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529 } |
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530 |
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531 Klass* Klass::array_klass_or_null(int rank) { |
0 | 532 EXCEPTION_MARK; |
533 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
534 // (In anycase, the execption mark will fail if it do so) | |
535 return array_klass_impl(true, rank, THREAD); | |
536 } | |
537 | |
538 | |
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539 Klass* Klass::array_klass_or_null() { |
0 | 540 EXCEPTION_MARK; |
541 // No exception can be thrown by array_klass_impl when called with or_null == true. | |
542 // (In anycase, the execption mark will fail if it do so) | |
543 return array_klass_impl(true, THREAD); | |
544 } | |
545 | |
546 | |
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547 Klass* Klass::array_klass_impl(bool or_null, int rank, TRAPS) { |
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548 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
0 | 549 return NULL; |
550 } | |
551 | |
552 | |
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553 Klass* Klass::array_klass_impl(bool or_null, TRAPS) { |
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554 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
0 | 555 return NULL; |
556 } | |
557 | |
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558 oop Klass::class_loader() const { return class_loader_data()->class_loader(); } |
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559 |
0 | 560 const char* Klass::external_name() const { |
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561 if (oop_is_instance()) { |
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562 InstanceKlass* ik = (InstanceKlass*) this; |
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563 if (ik->is_anonymous()) { |
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564 assert(EnableInvokeDynamic, ""); |
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565 intptr_t hash = 0; |
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566 if (ik->java_mirror() != NULL) { |
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567 // java_mirror might not be created yet, return 0 as hash. |
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568 hash = ik->java_mirror()->identity_hash(); |
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569 } |
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570 char hash_buf[40]; |
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571 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash); |
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572 size_t hash_len = strlen(hash_buf); |
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573 |
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574 size_t result_len = name()->utf8_length(); |
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575 char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1); |
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576 name()->as_klass_external_name(result, (int) result_len + 1); |
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577 assert(strlen(result) == result_len, ""); |
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578 strcpy(result + result_len, hash_buf); |
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579 assert(strlen(result) == result_len + hash_len, ""); |
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580 return result; |
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581 } |
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582 } |
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583 if (name() == NULL) return "<unknown>"; |
0 | 584 return name()->as_klass_external_name(); |
585 } | |
586 | |
587 | |
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588 const char* Klass::signature_name() const { |
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589 if (name() == NULL) return "<unknown>"; |
0 | 590 return name()->as_C_string(); |
591 } | |
592 | |
593 // Unless overridden, modifier_flags is 0. | |
594 jint Klass::compute_modifier_flags(TRAPS) const { | |
595 return 0; | |
596 } | |
597 | |
598 int Klass::atomic_incr_biased_lock_revocation_count() { | |
599 return (int) Atomic::add(1, &_biased_lock_revocation_count); | |
600 } | |
601 | |
602 // Unless overridden, jvmti_class_status has no flags set. | |
603 jint Klass::jvmti_class_status() const { | |
604 return 0; | |
605 } | |
606 | |
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607 |
0 | 608 // Printing |
609 | |
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610 void Klass::print_on(outputStream* st) const { |
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611 ResourceMark rm; |
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612 // print title |
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613 st->print("%s", internal_name()); |
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614 print_address_on(st); |
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615 st->cr(); |
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616 } |
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617 |
0 | 618 void Klass::oop_print_on(oop obj, outputStream* st) { |
619 ResourceMark rm; | |
620 // print title | |
621 st->print_cr("%s ", internal_name()); | |
622 obj->print_address_on(st); | |
623 | |
624 if (WizardMode) { | |
625 // print header | |
626 obj->mark()->print_on(st); | |
627 } | |
628 | |
629 // print class | |
630 st->print(" - klass: "); | |
631 obj->klass()->print_value_on(st); | |
632 st->cr(); | |
633 } | |
634 | |
635 void Klass::oop_print_value_on(oop obj, outputStream* st) { | |
636 // print title | |
637 ResourceMark rm; // Cannot print in debug mode without this | |
638 st->print("%s", internal_name()); | |
639 obj->print_address_on(st); | |
640 } | |
641 | |
7956 | 642 #if INCLUDE_SERVICES |
643 // Size Statistics | |
644 void Klass::collect_statistics(KlassSizeStats *sz) const { | |
645 sz->_klass_bytes = sz->count(this); | |
646 sz->_mirror_bytes = sz->count(java_mirror()); | |
647 sz->_secondary_supers_bytes = sz->count_array(secondary_supers()); | |
648 | |
649 sz->_ro_bytes += sz->_secondary_supers_bytes; | |
650 sz->_rw_bytes += sz->_klass_bytes + sz->_mirror_bytes; | |
651 } | |
652 #endif // INCLUDE_SERVICES | |
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653 |
0 | 654 // Verification |
655 | |
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656 void Klass::verify_on(outputStream* st) { |
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657 |
11034 | 658 // This can be expensive, but it is worth checking that this klass is actually |
659 // in the CLD graph but not in production. | |
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660 assert(Metaspace::contains((address)this), "Should be"); |
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661 |
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662 guarantee(this->is_klass(),"should be klass"); |
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663 |
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664 if (super() != NULL) { |
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665 guarantee(super()->is_klass(), "should be klass"); |
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666 } |
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667 if (secondary_super_cache() != NULL) { |
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668 Klass* ko = secondary_super_cache(); |
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669 guarantee(ko->is_klass(), "should be klass"); |
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670 } |
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671 for ( uint i = 0; i < primary_super_limit(); i++ ) { |
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672 Klass* ko = _primary_supers[i]; |
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673 if (ko != NULL) { |
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674 guarantee(ko->is_klass(), "should be klass"); |
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675 } |
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676 } |
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677 |
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678 if (java_mirror() != NULL) { |
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679 guarantee(java_mirror()->is_oop(), "should be instance"); |
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680 } |
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681 } |
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682 |
0 | 683 void Klass::oop_verify_on(oop obj, outputStream* st) { |
684 guarantee(obj->is_oop(), "should be oop"); | |
685 guarantee(obj->klass()->is_klass(), "klass field is not a klass"); | |
686 } | |
687 | |
688 #ifndef PRODUCT | |
689 | |
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690 bool Klass::verify_vtable_index(int i) { |
0 | 691 if (oop_is_instance()) { |
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692 int limit = ((InstanceKlass*)this)->vtable_length()/vtableEntry::size(); |
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693 assert(i >= 0 && i < limit, err_msg("index %d out of bounds %d", i, limit)); |
0 | 694 } else { |
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695 assert(oop_is_array(), "Must be"); |
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696 int limit = ((ArrayKlass*)this)->vtable_length()/vtableEntry::size(); |
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697 assert(i >= 0 && i < limit, err_msg("index %d out of bounds %d", i, limit)); |
0 | 698 } |
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699 return true; |
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700 } |
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701 |
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702 bool Klass::verify_itable_index(int i) { |
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703 assert(oop_is_instance(), ""); |
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704 int method_count = klassItable::method_count_for_interface(this); |
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705 assert(i >= 0 && i < method_count, "index out of bounds"); |
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706 return true; |
0 | 707 } |
708 | |
709 #endif |