Mercurial > hg > truffle
comparison src/share/vm/oops/klassVtable.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | 8ce625481709 |
children | d8ce2825b193 |
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6724:36d1d483d5d6 | 6725:da91efe96a93 |
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1 /* | 1 /* |
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. | 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | 4 * |
5 * This code is free software; you can redistribute it and/or modify it | 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 | 6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. | 7 * published by the Free Software Foundation. |
28 #include "gc_implementation/shared/markSweep.inline.hpp" | 28 #include "gc_implementation/shared/markSweep.inline.hpp" |
29 #include "memory/gcLocker.hpp" | 29 #include "memory/gcLocker.hpp" |
30 #include "memory/resourceArea.hpp" | 30 #include "memory/resourceArea.hpp" |
31 #include "memory/universe.inline.hpp" | 31 #include "memory/universe.inline.hpp" |
32 #include "oops/instanceKlass.hpp" | 32 #include "oops/instanceKlass.hpp" |
33 #include "oops/klassOop.hpp" | |
34 #include "oops/klassVtable.hpp" | 33 #include "oops/klassVtable.hpp" |
35 #include "oops/methodOop.hpp" | 34 #include "oops/method.hpp" |
36 #include "oops/objArrayOop.hpp" | 35 #include "oops/objArrayOop.hpp" |
37 #include "oops/oop.inline.hpp" | 36 #include "oops/oop.inline.hpp" |
38 #include "prims/jvmtiRedefineClassesTrace.hpp" | 37 #include "prims/jvmtiRedefineClassesTrace.hpp" |
39 #include "runtime/arguments.hpp" | 38 #include "runtime/arguments.hpp" |
40 #include "runtime/handles.inline.hpp" | 39 #include "runtime/handles.inline.hpp" |
41 #include "utilities/copy.hpp" | 40 #include "utilities/copy.hpp" |
42 | 41 |
43 inline instanceKlass* klassVtable::ik() const { | 42 inline InstanceKlass* klassVtable::ik() const { |
44 Klass* k = _klass()->klass_part(); | 43 Klass* k = _klass(); |
45 assert(k->oop_is_instance(), "not an instanceKlass"); | 44 assert(k->oop_is_instance(), "not an InstanceKlass"); |
46 return (instanceKlass*)k; | 45 return (InstanceKlass*)k; |
47 } | 46 } |
48 | 47 |
49 | 48 |
50 // this function computes the vtable size (including the size needed for miranda | 49 // this function computes the vtable size (including the size needed for miranda |
51 // methods) and the number of miranda methods in this class | 50 // methods) and the number of miranda methods in this class |
55 // the same name and signature as m), then m is a Miranda method which is | 54 // the same name and signature as m), then m is a Miranda method which is |
56 // entered as a public abstract method in C's vtable. From then on it should | 55 // entered as a public abstract method in C's vtable. From then on it should |
57 // treated as any other public method in C for method over-ride purposes. | 56 // treated as any other public method in C for method over-ride purposes. |
58 void klassVtable::compute_vtable_size_and_num_mirandas(int &vtable_length, | 57 void klassVtable::compute_vtable_size_and_num_mirandas(int &vtable_length, |
59 int &num_miranda_methods, | 58 int &num_miranda_methods, |
60 klassOop super, | 59 Klass* super, |
61 objArrayOop methods, | 60 Array<Method*>* methods, |
62 AccessFlags class_flags, | 61 AccessFlags class_flags, |
63 Handle classloader, | 62 Handle classloader, |
64 Symbol* classname, | 63 Symbol* classname, |
65 objArrayOop local_interfaces, | 64 Array<Klass*>* local_interfaces, |
66 TRAPS | 65 TRAPS |
67 ) { | 66 ) { |
68 | 67 |
69 No_Safepoint_Verifier nsv; | 68 No_Safepoint_Verifier nsv; |
70 | 69 |
71 // set up default result values | 70 // set up default result values |
72 vtable_length = 0; | 71 vtable_length = 0; |
73 num_miranda_methods = 0; | 72 num_miranda_methods = 0; |
74 | 73 |
75 // start off with super's vtable length | 74 // start off with super's vtable length |
76 instanceKlass* sk = (instanceKlass*)super->klass_part(); | 75 InstanceKlass* sk = (InstanceKlass*)super; |
77 vtable_length = super == NULL ? 0 : sk->vtable_length(); | 76 vtable_length = super == NULL ? 0 : sk->vtable_length(); |
78 | 77 |
79 // go thru each method in the methods table to see if it needs a new entry | 78 // go thru each method in the methods table to see if it needs a new entry |
80 int len = methods->length(); | 79 int len = methods->length(); |
81 for (int i = 0; i < len; i++) { | 80 for (int i = 0; i < len; i++) { |
82 assert(methods->obj_at(i)->is_method(), "must be a methodOop"); | 81 assert(methods->at(i)->is_method(), "must be a Method*"); |
83 methodHandle mh(THREAD, methodOop(methods->obj_at(i))); | 82 methodHandle mh(THREAD, methods->at(i)); |
84 | 83 |
85 if (needs_new_vtable_entry(mh, super, classloader, classname, class_flags, THREAD)) { | 84 if (needs_new_vtable_entry(mh, super, classloader, classname, class_flags, THREAD)) { |
86 vtable_length += vtableEntry::size(); // we need a new entry | 85 vtable_length += vtableEntry::size(); // we need a new entry |
87 } | 86 } |
88 } | 87 } |
110 "bad vtable size for class Object"); | 109 "bad vtable size for class Object"); |
111 assert(vtable_length % vtableEntry::size() == 0, "bad vtable length"); | 110 assert(vtable_length % vtableEntry::size() == 0, "bad vtable length"); |
112 assert(vtable_length >= Universe::base_vtable_size(), "vtable too small"); | 111 assert(vtable_length >= Universe::base_vtable_size(), "vtable too small"); |
113 } | 112 } |
114 | 113 |
115 int klassVtable::index_of(methodOop m, int len) const { | 114 int klassVtable::index_of(Method* m, int len) const { |
116 assert(m->vtable_index() >= 0, "do not ask this of non-vtable methods"); | 115 assert(m->vtable_index() >= 0, "do not ask this of non-vtable methods"); |
117 return m->vtable_index(); | 116 return m->vtable_index(); |
118 } | 117 } |
119 | 118 |
120 int klassVtable::initialize_from_super(KlassHandle super) { | 119 int klassVtable::initialize_from_super(KlassHandle super) { |
121 if (super.is_null()) { | 120 if (super.is_null()) { |
122 return 0; | 121 return 0; |
123 } else { | 122 } else { |
124 // copy methods from superKlass | 123 // copy methods from superKlass |
125 // can't inherit from array class, so must be instanceKlass | 124 // can't inherit from array class, so must be InstanceKlass |
126 assert(super->oop_is_instance(), "must be instance klass"); | 125 assert(super->oop_is_instance(), "must be instance klass"); |
127 instanceKlass* sk = (instanceKlass*)super()->klass_part(); | 126 InstanceKlass* sk = (InstanceKlass*)super(); |
128 klassVtable* superVtable = sk->vtable(); | 127 klassVtable* superVtable = sk->vtable(); |
129 assert(superVtable->length() <= _length, "vtable too short"); | 128 assert(superVtable->length() <= _length, "vtable too short"); |
130 #ifdef ASSERT | 129 #ifdef ASSERT |
131 superVtable->verify(tty, true); | 130 superVtable->verify(tty, true); |
132 #endif | 131 #endif |
168 | 167 |
169 int super_vtable_len = initialize_from_super(super); | 168 int super_vtable_len = initialize_from_super(super); |
170 if (klass()->oop_is_array()) { | 169 if (klass()->oop_is_array()) { |
171 assert(super_vtable_len == _length, "arrays shouldn't introduce new methods"); | 170 assert(super_vtable_len == _length, "arrays shouldn't introduce new methods"); |
172 } else { | 171 } else { |
173 assert(_klass->oop_is_instance(), "must be instanceKlass"); | 172 assert(_klass->oop_is_instance(), "must be InstanceKlass"); |
174 | 173 |
175 objArrayHandle methods(THREAD, ik()->methods()); | 174 Array<Method*>* methods = ik()->methods(); |
176 int len = methods()->length(); | 175 int len = methods->length(); |
177 int initialized = super_vtable_len; | 176 int initialized = super_vtable_len; |
178 | 177 |
179 // update_inherited_vtable can stop for gc - ensure using handles | 178 // update_inherited_vtable can stop for gc - ensure using handles |
180 for (int i = 0; i < len; i++) { | 179 for (int i = 0; i < len; i++) { |
181 HandleMark hm(THREAD); | 180 HandleMark hm(THREAD); |
182 assert(methods()->obj_at(i)->is_method(), "must be a methodOop"); | 181 assert(methods->at(i)->is_method(), "must be a Method*"); |
183 methodHandle mh(THREAD, (methodOop)methods()->obj_at(i)); | 182 methodHandle mh(THREAD, methods->at(i)); |
184 | 183 |
185 bool needs_new_entry = update_inherited_vtable(ik(), mh, super_vtable_len, checkconstraints, CHECK); | 184 bool needs_new_entry = update_inherited_vtable(ik(), mh, super_vtable_len, checkconstraints, CHECK); |
186 | 185 |
187 if (needs_new_entry) { | 186 if (needs_new_entry) { |
188 put_method_at(mh(), initialized); | 187 put_method_at(mh(), initialized); |
207 | 206 |
208 // Called for cases where a method does not override its superclass' vtable entry | 207 // Called for cases where a method does not override its superclass' vtable entry |
209 // For bytecodes not produced by javac together it is possible that a method does not override | 208 // For bytecodes not produced by javac together it is possible that a method does not override |
210 // the superclass's method, but might indirectly override a super-super class's vtable entry | 209 // the superclass's method, but might indirectly override a super-super class's vtable entry |
211 // If none found, return a null superk, else return the superk of the method this does override | 210 // If none found, return a null superk, else return the superk of the method this does override |
212 instanceKlass* klassVtable::find_transitive_override(instanceKlass* initialsuper, methodHandle target_method, | 211 InstanceKlass* klassVtable::find_transitive_override(InstanceKlass* initialsuper, methodHandle target_method, |
213 int vtable_index, Handle target_loader, Symbol* target_classname, Thread * THREAD) { | 212 int vtable_index, Handle target_loader, Symbol* target_classname, Thread * THREAD) { |
214 instanceKlass* superk = initialsuper; | 213 InstanceKlass* superk = initialsuper; |
215 while (superk != NULL && superk->super() != NULL) { | 214 while (superk != NULL && superk->super() != NULL) { |
216 instanceKlass* supersuperklass = instanceKlass::cast(superk->super()); | 215 InstanceKlass* supersuperklass = InstanceKlass::cast(superk->super()); |
217 klassVtable* ssVtable = supersuperklass->vtable(); | 216 klassVtable* ssVtable = supersuperklass->vtable(); |
218 if (vtable_index < ssVtable->length()) { | 217 if (vtable_index < ssVtable->length()) { |
219 methodOop super_method = ssVtable->method_at(vtable_index); | 218 Method* super_method = ssVtable->method_at(vtable_index); |
220 #ifndef PRODUCT | 219 #ifndef PRODUCT |
221 Symbol* name= target_method()->name(); | 220 Symbol* name= target_method()->name(); |
222 Symbol* signature = target_method()->signature(); | 221 Symbol* signature = target_method()->signature(); |
223 assert(super_method->name() == name && super_method->signature() == signature, "vtable entry name/sig mismatch"); | 222 assert(super_method->name() == name && super_method->signature() == signature, "vtable entry name/sig mismatch"); |
224 #endif | 223 #endif |
238 #endif /*PRODUCT*/ | 237 #endif /*PRODUCT*/ |
239 break; // return found superk | 238 break; // return found superk |
240 } | 239 } |
241 } else { | 240 } else { |
242 // super class has no vtable entry here, stop transitive search | 241 // super class has no vtable entry here, stop transitive search |
243 superk = (instanceKlass*)NULL; | 242 superk = (InstanceKlass*)NULL; |
244 break; | 243 break; |
245 } | 244 } |
246 // if no override found yet, continue to search up | 245 // if no override found yet, continue to search up |
247 superk = instanceKlass::cast(superk->super()); | 246 superk = InstanceKlass::cast(superk->super()); |
248 } | 247 } |
249 | 248 |
250 return superk; | 249 return superk; |
251 } | 250 } |
252 | 251 |
253 | 252 |
254 // Update child's copy of super vtable for overrides | 253 // Update child's copy of super vtable for overrides |
255 // OR return true if a new vtable entry is required | 254 // OR return true if a new vtable entry is required |
256 // Only called for instanceKlass's, i.e. not for arrays | 255 // Only called for InstanceKlass's, i.e. not for arrays |
257 // If that changed, could not use _klass as handle for klass | 256 // If that changed, could not use _klass as handle for klass |
258 bool klassVtable::update_inherited_vtable(instanceKlass* klass, methodHandle target_method, int super_vtable_len, | 257 bool klassVtable::update_inherited_vtable(InstanceKlass* klass, methodHandle target_method, int super_vtable_len, |
259 bool checkconstraints, TRAPS) { | 258 bool checkconstraints, TRAPS) { |
260 ResourceMark rm; | 259 ResourceMark rm; |
261 bool allocate_new = true; | 260 bool allocate_new = true; |
262 assert(klass->oop_is_instance(), "must be instanceKlass"); | 261 assert(klass->oop_is_instance(), "must be InstanceKlass"); |
263 | 262 |
264 // Initialize the method's vtable index to "nonvirtual". | 263 // Initialize the method's vtable index to "nonvirtual". |
265 // If we allocate a vtable entry, we will update it to a non-negative number. | 264 // If we allocate a vtable entry, we will update it to a non-negative number. |
266 target_method()->set_vtable_index(methodOopDesc::nonvirtual_vtable_index); | 265 target_method()->set_vtable_index(Method::nonvirtual_vtable_index); |
267 | 266 |
268 // Static and <init> methods are never in | 267 // Static and <init> methods are never in |
269 if (target_method()->is_static() || target_method()->name() == vmSymbols::object_initializer_name()) { | 268 if (target_method()->is_static() || target_method()->name() == vmSymbols::object_initializer_name()) { |
270 return false; | 269 return false; |
271 } | 270 } |
294 // which can block for gc, once we are in this loop, use handles | 293 // which can block for gc, once we are in this loop, use handles |
295 // For classfiles built with >= jdk7, we now look for transitive overrides | 294 // For classfiles built with >= jdk7, we now look for transitive overrides |
296 | 295 |
297 Symbol* name = target_method()->name(); | 296 Symbol* name = target_method()->name(); |
298 Symbol* signature = target_method()->signature(); | 297 Symbol* signature = target_method()->signature(); |
299 Handle target_loader(THREAD, _klass->class_loader()); | 298 Handle target_loader(THREAD, _klass()->class_loader()); |
300 Symbol* target_classname = _klass->name(); | 299 Symbol* target_classname = _klass->name(); |
301 for(int i = 0; i < super_vtable_len; i++) { | 300 for(int i = 0; i < super_vtable_len; i++) { |
302 methodOop super_method = method_at(i); | 301 Method* super_method = method_at(i); |
303 // Check if method name matches | 302 // Check if method name matches |
304 if (super_method->name() == name && super_method->signature() == signature) { | 303 if (super_method->name() == name && super_method->signature() == signature) { |
305 | 304 |
306 // get super_klass for method_holder for the found method | 305 // get super_klass for method_holder for the found method |
307 instanceKlass* super_klass = instanceKlass::cast(super_method->method_holder()); | 306 InstanceKlass* super_klass = InstanceKlass::cast(super_method->method_holder()); |
308 | 307 |
309 if ((super_klass->is_override(super_method, target_loader, target_classname, THREAD)) || | 308 if ((super_klass->is_override(super_method, target_loader, target_classname, THREAD)) || |
310 ((klass->major_version() >= VTABLE_TRANSITIVE_OVERRIDE_VERSION) | 309 ((klass->major_version() >= VTABLE_TRANSITIVE_OVERRIDE_VERSION) |
311 && ((super_klass = find_transitive_override(super_klass, target_method, i, target_loader, | 310 && ((super_klass = find_transitive_override(super_klass, target_method, i, target_loader, |
312 target_classname, THREAD)) != (instanceKlass*)NULL))) { | 311 target_classname, THREAD)) != (InstanceKlass*)NULL))) { |
313 // overriding, so no new entry | 312 // overriding, so no new entry |
314 allocate_new = false; | 313 allocate_new = false; |
315 | 314 |
316 if (checkconstraints) { | 315 if (checkconstraints) { |
317 // Override vtable entry if passes loader constraint check | 316 // Override vtable entry if passes loader constraint check |
379 } | 378 } |
380 } | 379 } |
381 return allocate_new; | 380 return allocate_new; |
382 } | 381 } |
383 | 382 |
384 void klassVtable::put_method_at(methodOop m, int index) { | 383 void klassVtable::put_method_at(Method* m, int index) { |
385 assert(m->is_oop_or_null(), "Not an oop or null"); | |
386 #ifndef PRODUCT | 384 #ifndef PRODUCT |
387 if (PrintVtables && Verbose) { | 385 if (PrintVtables && Verbose) { |
388 ResourceMark rm; | 386 ResourceMark rm; |
389 tty->print_cr("adding %s::%s at index %d", _klass->internal_name(), | 387 tty->print_cr("adding %s::%s at index %d", _klass->internal_name(), |
390 (m != NULL) ? m->name()->as_C_string() : "<NULL>", index); | 388 (m != NULL) ? m->name()->as_C_string() : "<NULL>", index); |
391 } | 389 } |
392 assert(unchecked_method_at(index)->is_oop_or_null(), "Not an oop or null"); | |
393 #endif | 390 #endif |
394 table()[index].set(m); | 391 table()[index].set(m); |
395 } | 392 } |
396 | 393 |
397 // Find out if a method "m" with superclass "super", loader "classloader" and | 394 // Find out if a method "m" with superclass "super", loader "classloader" and |
398 // name "classname" needs a new vtable entry. Let P be a class package defined | 395 // name "classname" needs a new vtable entry. Let P be a class package defined |
399 // by "classloader" and "classname". | 396 // by "classloader" and "classname". |
400 // NOTE: The logic used here is very similar to the one used for computing | 397 // NOTE: The logic used here is very similar to the one used for computing |
401 // the vtables indices for a method. We cannot directly use that function because, | 398 // the vtables indices for a method. We cannot directly use that function because, |
402 // we allocate the instanceKlass at load time, and that requires that the | 399 // we allocate the InstanceKlass at load time, and that requires that the |
403 // superclass has been loaded. | 400 // superclass has been loaded. |
404 // However, the vtable entries are filled in at link time, and therefore | 401 // However, the vtable entries are filled in at link time, and therefore |
405 // the superclass' vtable may not yet have been filled in. | 402 // the superclass' vtable may not yet have been filled in. |
406 bool klassVtable::needs_new_vtable_entry(methodHandle target_method, | 403 bool klassVtable::needs_new_vtable_entry(methodHandle target_method, |
407 klassOop super, | 404 Klass* super, |
408 Handle classloader, | 405 Handle classloader, |
409 Symbol* classname, | 406 Symbol* classname, |
410 AccessFlags class_flags, | 407 AccessFlags class_flags, |
411 TRAPS) { | 408 TRAPS) { |
412 if ((class_flags.is_final() || target_method()->is_final()) || | 409 if ((class_flags.is_final() || target_method()->is_final()) || |
436 // search through the super class hierarchy to see if we need | 433 // search through the super class hierarchy to see if we need |
437 // a new entry | 434 // a new entry |
438 ResourceMark rm; | 435 ResourceMark rm; |
439 Symbol* name = target_method()->name(); | 436 Symbol* name = target_method()->name(); |
440 Symbol* signature = target_method()->signature(); | 437 Symbol* signature = target_method()->signature(); |
441 klassOop k = super; | 438 Klass* k = super; |
442 methodOop super_method = NULL; | 439 Method* super_method = NULL; |
443 instanceKlass *holder = NULL; | 440 InstanceKlass *holder = NULL; |
444 methodOop recheck_method = NULL; | 441 Method* recheck_method = NULL; |
445 while (k != NULL) { | 442 while (k != NULL) { |
446 // lookup through the hierarchy for a method with matching name and sign. | 443 // lookup through the hierarchy for a method with matching name and sign. |
447 super_method = instanceKlass::cast(k)->lookup_method(name, signature); | 444 super_method = InstanceKlass::cast(k)->lookup_method(name, signature); |
448 if (super_method == NULL) { | 445 if (super_method == NULL) { |
449 break; // we still have to search for a matching miranda method | 446 break; // we still have to search for a matching miranda method |
450 } | 447 } |
451 // get the class holding the matching method | 448 // get the class holding the matching method |
452 // make sure you use that class for is_override | 449 // make sure you use that class for is_override |
453 instanceKlass* superk = instanceKlass::cast(super_method->method_holder()); | 450 InstanceKlass* superk = InstanceKlass::cast(super_method->method_holder()); |
454 // we want only instance method matches | 451 // we want only instance method matches |
455 // pretend private methods are not in the super vtable | 452 // pretend private methods are not in the super vtable |
456 // since we do override around them: e.g. a.m pub/b.m private/c.m pub, | 453 // since we do override around them: e.g. a.m pub/b.m private/c.m pub, |
457 // ignore private, c.m pub does override a.m pub | 454 // ignore private, c.m pub does override a.m pub |
458 // For classes that were not javac'd together, we also do transitive overriding around | 455 // For classes that were not javac'd together, we also do transitive overriding around |
471 | 468 |
472 // if the target method is public or protected it may have a matching | 469 // if the target method is public or protected it may have a matching |
473 // miranda method in the super, whose entry it should re-use. | 470 // miranda method in the super, whose entry it should re-use. |
474 // Actually, to handle cases that javac would not generate, we need | 471 // Actually, to handle cases that javac would not generate, we need |
475 // this check for all access permissions. | 472 // this check for all access permissions. |
476 instanceKlass *sk = instanceKlass::cast(super); | 473 InstanceKlass *sk = InstanceKlass::cast(super); |
477 if (sk->has_miranda_methods()) { | 474 if (sk->has_miranda_methods()) { |
478 if (sk->lookup_method_in_all_interfaces(name, signature) != NULL) { | 475 if (sk->lookup_method_in_all_interfaces(name, signature) != NULL) { |
479 return false; // found a matching miranda; we do not need a new entry | 476 return false; // found a matching miranda; we do not need a new entry |
480 } | 477 } |
481 } | 478 } |
486 | 483 |
487 // get the vtable index of a miranda method with matching "name" and "signature" | 484 // get the vtable index of a miranda method with matching "name" and "signature" |
488 int klassVtable::index_of_miranda(Symbol* name, Symbol* signature) { | 485 int klassVtable::index_of_miranda(Symbol* name, Symbol* signature) { |
489 // search from the bottom, might be faster | 486 // search from the bottom, might be faster |
490 for (int i = (length() - 1); i >= 0; i--) { | 487 for (int i = (length() - 1); i >= 0; i--) { |
491 methodOop m = table()[i].method(); | 488 Method* m = table()[i].method(); |
492 if (is_miranda_entry_at(i) && | 489 if (is_miranda_entry_at(i) && |
493 m->name() == name && m->signature() == signature) { | 490 m->name() == name && m->signature() == signature) { |
494 return i; | 491 return i; |
495 } | 492 } |
496 } | 493 } |
497 return methodOopDesc::invalid_vtable_index; | 494 return Method::invalid_vtable_index; |
498 } | 495 } |
499 | 496 |
500 // check if an entry is miranda | 497 // check if an entry is miranda |
501 bool klassVtable::is_miranda_entry_at(int i) { | 498 bool klassVtable::is_miranda_entry_at(int i) { |
502 methodOop m = method_at(i); | 499 Method* m = method_at(i); |
503 klassOop method_holder = m->method_holder(); | 500 Klass* method_holder = m->method_holder(); |
504 instanceKlass *mhk = instanceKlass::cast(method_holder); | 501 InstanceKlass *mhk = InstanceKlass::cast(method_holder); |
505 | 502 |
506 // miranda methods are interface methods in a class's vtable | 503 // miranda methods are interface methods in a class's vtable |
507 if (mhk->is_interface()) { | 504 if (mhk->is_interface()) { |
508 assert(m->is_public() && m->is_abstract(), "should be public and abstract"); | 505 assert(m->is_public() && m->is_abstract(), "should be public and abstract"); |
509 assert(ik()->implements_interface(method_holder) , "this class should implement the interface"); | 506 assert(ik()->implements_interface(method_holder) , "this class should implement the interface"); |
513 return false; | 510 return false; |
514 } | 511 } |
515 | 512 |
516 // check if a method is a miranda method, given a class's methods table and it's super | 513 // check if a method is a miranda method, given a class's methods table and it's super |
517 // the caller must make sure that the method belongs to an interface implemented by the class | 514 // the caller must make sure that the method belongs to an interface implemented by the class |
518 bool klassVtable::is_miranda(methodOop m, objArrayOop class_methods, klassOop super) { | 515 bool klassVtable::is_miranda(Method* m, Array<Method*>* class_methods, Klass* super) { |
519 Symbol* name = m->name(); | 516 Symbol* name = m->name(); |
520 Symbol* signature = m->signature(); | 517 Symbol* signature = m->signature(); |
521 if (instanceKlass::find_method(class_methods, name, signature) == NULL) { | 518 if (InstanceKlass::find_method(class_methods, name, signature) == NULL) { |
522 // did not find it in the method table of the current class | 519 // did not find it in the method table of the current class |
523 if (super == NULL) { | 520 if (super == NULL) { |
524 // super doesn't exist | 521 // super doesn't exist |
525 return true; | 522 return true; |
526 } | 523 } |
527 | 524 |
528 methodOop mo = instanceKlass::cast(super)->lookup_method(name, signature); | 525 Method* mo = InstanceKlass::cast(super)->lookup_method(name, signature); |
529 if (mo == NULL || mo->access_flags().is_private() ) { | 526 if (mo == NULL || mo->access_flags().is_private() ) { |
530 // super class hierarchy does not implement it or protection is different | 527 // super class hierarchy does not implement it or protection is different |
531 return true; | 528 return true; |
532 } | 529 } |
533 } | 530 } |
534 | 531 |
535 return false; | 532 return false; |
536 } | 533 } |
537 | 534 |
538 void klassVtable::add_new_mirandas_to_list(GrowableArray<methodOop>* list_of_current_mirandas, | 535 void klassVtable::add_new_mirandas_to_list(GrowableArray<Method*>* list_of_current_mirandas, |
539 objArrayOop current_interface_methods, | 536 Array<Method*>* current_interface_methods, |
540 objArrayOop class_methods, | 537 Array<Method*>* class_methods, |
541 klassOop super) { | 538 Klass* super) { |
542 // iterate thru the current interface's method to see if it a miranda | 539 // iterate thru the current interface's method to see if it a miranda |
543 int num_methods = current_interface_methods->length(); | 540 int num_methods = current_interface_methods->length(); |
544 for (int i = 0; i < num_methods; i++) { | 541 for (int i = 0; i < num_methods; i++) { |
545 methodOop im = methodOop(current_interface_methods->obj_at(i)); | 542 Method* im = current_interface_methods->at(i); |
546 bool is_duplicate = false; | 543 bool is_duplicate = false; |
547 int num_of_current_mirandas = list_of_current_mirandas->length(); | 544 int num_of_current_mirandas = list_of_current_mirandas->length(); |
548 // check for duplicate mirandas in different interfaces we implement | 545 // check for duplicate mirandas in different interfaces we implement |
549 for (int j = 0; j < num_of_current_mirandas; j++) { | 546 for (int j = 0; j < num_of_current_mirandas; j++) { |
550 methodOop miranda = list_of_current_mirandas->at(j); | 547 Method* miranda = list_of_current_mirandas->at(j); |
551 if ((im->name() == miranda->name()) && | 548 if ((im->name() == miranda->name()) && |
552 (im->signature() == miranda->signature())) { | 549 (im->signature() == miranda->signature())) { |
553 is_duplicate = true; | 550 is_duplicate = true; |
554 break; | 551 break; |
555 } | 552 } |
556 } | 553 } |
557 | 554 |
558 if (!is_duplicate) { // we don't want duplicate miranda entries in the vtable | 555 if (!is_duplicate) { // we don't want duplicate miranda entries in the vtable |
559 if (is_miranda(im, class_methods, super)) { // is it a miranda at all? | 556 if (is_miranda(im, class_methods, super)) { // is it a miranda at all? |
560 instanceKlass *sk = instanceKlass::cast(super); | 557 InstanceKlass *sk = InstanceKlass::cast(super); |
561 // check if it is a duplicate of a super's miranda | 558 // check if it is a duplicate of a super's miranda |
562 if (sk->lookup_method_in_all_interfaces(im->name(), im->signature()) == NULL) { | 559 if (sk->lookup_method_in_all_interfaces(im->name(), im->signature()) == NULL) { |
563 list_of_current_mirandas->append(im); | 560 list_of_current_mirandas->append(im); |
564 } | 561 } |
565 } | 562 } |
566 } | 563 } |
567 } | 564 } |
568 } | 565 } |
569 | 566 |
570 void klassVtable::get_mirandas(GrowableArray<methodOop>* mirandas, | 567 void klassVtable::get_mirandas(GrowableArray<Method*>* mirandas, |
571 klassOop super, objArrayOop class_methods, | 568 Klass* super, Array<Method*>* class_methods, |
572 objArrayOop local_interfaces) { | 569 Array<Klass*>* local_interfaces) { |
573 assert((mirandas->length() == 0) , "current mirandas must be 0"); | 570 assert((mirandas->length() == 0) , "current mirandas must be 0"); |
574 | 571 |
575 // iterate thru the local interfaces looking for a miranda | 572 // iterate thru the local interfaces looking for a miranda |
576 int num_local_ifs = local_interfaces->length(); | 573 int num_local_ifs = local_interfaces->length(); |
577 for (int i = 0; i < num_local_ifs; i++) { | 574 for (int i = 0; i < num_local_ifs; i++) { |
578 instanceKlass *ik = instanceKlass::cast(klassOop(local_interfaces->obj_at(i))); | 575 InstanceKlass *ik = InstanceKlass::cast(local_interfaces->at(i)); |
579 add_new_mirandas_to_list(mirandas, ik->methods(), class_methods, super); | 576 add_new_mirandas_to_list(mirandas, ik->methods(), class_methods, super); |
580 // iterate thru each local's super interfaces | 577 // iterate thru each local's super interfaces |
581 objArrayOop super_ifs = ik->transitive_interfaces(); | 578 Array<Klass*>* super_ifs = ik->transitive_interfaces(); |
582 int num_super_ifs = super_ifs->length(); | 579 int num_super_ifs = super_ifs->length(); |
583 for (int j = 0; j < num_super_ifs; j++) { | 580 for (int j = 0; j < num_super_ifs; j++) { |
584 instanceKlass *sik = instanceKlass::cast(klassOop(super_ifs->obj_at(j))); | 581 InstanceKlass *sik = InstanceKlass::cast(super_ifs->at(j)); |
585 add_new_mirandas_to_list(mirandas, sik->methods(), class_methods, super); | 582 add_new_mirandas_to_list(mirandas, sik->methods(), class_methods, super); |
586 } | 583 } |
587 } | 584 } |
588 } | 585 } |
589 | 586 |
590 // get number of mirandas | 587 // get number of mirandas |
591 int klassVtable::get_num_mirandas(klassOop super, objArrayOop class_methods, objArrayOop local_interfaces) { | 588 int klassVtable::get_num_mirandas(Klass* super, Array<Method*>* class_methods, Array<Klass*>* local_interfaces) { |
592 ResourceMark rm; | 589 ResourceMark rm; |
593 GrowableArray<methodOop>* mirandas = new GrowableArray<methodOop>(20); | 590 GrowableArray<Method*>* mirandas = new GrowableArray<Method*>(20); |
594 get_mirandas(mirandas, super, class_methods, local_interfaces); | 591 get_mirandas(mirandas, super, class_methods, local_interfaces); |
595 return mirandas->length(); | 592 return mirandas->length(); |
596 } | 593 } |
597 | 594 |
598 // fill in mirandas | 595 // fill in mirandas |
599 void klassVtable::fill_in_mirandas(int& initialized) { | 596 void klassVtable::fill_in_mirandas(int& initialized) { |
600 ResourceMark rm; | 597 ResourceMark rm; |
601 GrowableArray<methodOop>* mirandas = new GrowableArray<methodOop>(20); | 598 GrowableArray<Method*>* mirandas = new GrowableArray<Method*>(20); |
602 instanceKlass *this_ik = ik(); | 599 InstanceKlass *this_ik = ik(); |
603 get_mirandas(mirandas, this_ik->super(), this_ik->methods(), this_ik->local_interfaces()); | 600 get_mirandas(mirandas, this_ik->super(), this_ik->methods(), this_ik->local_interfaces()); |
604 int num_mirandas = mirandas->length(); | 601 int num_mirandas = mirandas->length(); |
605 for (int i = 0; i < num_mirandas; i++) { | 602 for (int i = 0; i < num_mirandas; i++) { |
606 put_method_at(mirandas->at(i), initialized); | 603 put_method_at(mirandas->at(i), initialized); |
607 initialized++; | 604 initialized++; |
610 | 607 |
611 void klassVtable::copy_vtable_to(vtableEntry* start) { | 608 void klassVtable::copy_vtable_to(vtableEntry* start) { |
612 Copy::disjoint_words((HeapWord*)table(), (HeapWord*)start, _length * vtableEntry::size()); | 609 Copy::disjoint_words((HeapWord*)table(), (HeapWord*)start, _length * vtableEntry::size()); |
613 } | 610 } |
614 | 611 |
615 void klassVtable::adjust_method_entries(methodOop* old_methods, methodOop* new_methods, | 612 void klassVtable::adjust_method_entries(Method** old_methods, Method** new_methods, |
616 int methods_length, bool * trace_name_printed) { | 613 int methods_length, bool * trace_name_printed) { |
617 // search the vtable for uses of either obsolete or EMCP methods | 614 // search the vtable for uses of either obsolete or EMCP methods |
618 for (int j = 0; j < methods_length; j++) { | 615 for (int j = 0; j < methods_length; j++) { |
619 methodOop old_method = old_methods[j]; | 616 Method* old_method = old_methods[j]; |
620 methodOop new_method = new_methods[j]; | 617 Method* new_method = new_methods[j]; |
621 | 618 |
622 // In the vast majority of cases we could get the vtable index | 619 // In the vast majority of cases we could get the vtable index |
623 // by using: old_method->vtable_index() | 620 // by using: old_method->vtable_index() |
624 // However, there are rare cases, eg. sun.awt.X11.XDecoratedPeer.getX() | 621 // However, there are rare cases, eg. sun.awt.X11.XDecoratedPeer.getX() |
625 // in sun.awt.X11.XFramePeer where methods occur more than once in the | 622 // in sun.awt.X11.XFramePeer where methods occur more than once in the |
652 | 649 |
653 bool klassVtable::is_initialized() { | 650 bool klassVtable::is_initialized() { |
654 return _length == 0 || table()[0].method() != NULL; | 651 return _length == 0 || table()[0].method() != NULL; |
655 } | 652 } |
656 | 653 |
657 | |
658 // Garbage collection | |
659 void klassVtable::oop_follow_contents() { | |
660 int len = length(); | |
661 for (int i = 0; i < len; i++) { | |
662 MarkSweep::mark_and_push(adr_method_at(i)); | |
663 } | |
664 } | |
665 | |
666 #ifndef SERIALGC | |
667 void klassVtable::oop_follow_contents(ParCompactionManager* cm) { | |
668 int len = length(); | |
669 for (int i = 0; i < len; i++) { | |
670 PSParallelCompact::mark_and_push(cm, adr_method_at(i)); | |
671 } | |
672 } | |
673 #endif // SERIALGC | |
674 | |
675 void klassVtable::oop_adjust_pointers() { | |
676 int len = length(); | |
677 for (int i = 0; i < len; i++) { | |
678 MarkSweep::adjust_pointer(adr_method_at(i)); | |
679 } | |
680 } | |
681 | |
682 #ifndef SERIALGC | |
683 void klassVtable::oop_update_pointers(ParCompactionManager* cm) { | |
684 const int n = length(); | |
685 for (int i = 0; i < n; i++) { | |
686 PSParallelCompact::adjust_pointer(adr_method_at(i)); | |
687 } | |
688 } | |
689 #endif // SERIALGC | |
690 | |
691 // Iterators | |
692 void klassVtable::oop_oop_iterate(OopClosure* blk) { | |
693 int len = length(); | |
694 for (int i = 0; i < len; i++) { | |
695 blk->do_oop(adr_method_at(i)); | |
696 } | |
697 } | |
698 | |
699 void klassVtable::oop_oop_iterate_m(OopClosure* blk, MemRegion mr) { | |
700 int len = length(); | |
701 int i; | |
702 for (i = 0; i < len; i++) { | |
703 if ((HeapWord*)adr_method_at(i) >= mr.start()) break; | |
704 } | |
705 for (; i < len; i++) { | |
706 oop* adr = adr_method_at(i); | |
707 if ((HeapWord*)adr < mr.end()) blk->do_oop(adr); | |
708 } | |
709 } | |
710 | |
711 //----------------------------------------------------------------------------------------- | 654 //----------------------------------------------------------------------------------------- |
712 // Itable code | 655 // Itable code |
713 | 656 |
714 // Initialize a itableMethodEntry | 657 // Initialize a itableMethodEntry |
715 void itableMethodEntry::initialize(methodOop m) { | 658 void itableMethodEntry::initialize(Method* m) { |
716 if (m == NULL) return; | 659 if (m == NULL) return; |
717 | 660 |
718 _method = m; | 661 _method = m; |
719 } | 662 } |
720 | 663 |
723 | 666 |
724 if (klass->itable_length() > 0) { | 667 if (klass->itable_length() > 0) { |
725 itableOffsetEntry* offset_entry = (itableOffsetEntry*)klass->start_of_itable(); | 668 itableOffsetEntry* offset_entry = (itableOffsetEntry*)klass->start_of_itable(); |
726 if (offset_entry != NULL && offset_entry->interface_klass() != NULL) { // Check that itable is initialized | 669 if (offset_entry != NULL && offset_entry->interface_klass() != NULL) { // Check that itable is initialized |
727 // First offset entry points to the first method_entry | 670 // First offset entry points to the first method_entry |
728 intptr_t* method_entry = (intptr_t *)(((address)klass->as_klassOop()) + offset_entry->offset()); | 671 intptr_t* method_entry = (intptr_t *)(((address)klass()) + offset_entry->offset()); |
729 intptr_t* end = klass->end_of_itable(); | 672 intptr_t* end = klass->end_of_itable(); |
730 | 673 |
731 _table_offset = (intptr_t*)offset_entry - (intptr_t*)klass->as_klassOop(); | 674 _table_offset = (intptr_t*)offset_entry - (intptr_t*)klass(); |
732 _size_offset_table = (method_entry - ((intptr_t*)offset_entry)) / itableOffsetEntry::size(); | 675 _size_offset_table = (method_entry - ((intptr_t*)offset_entry)) / itableOffsetEntry::size(); |
733 _size_method_table = (end - method_entry) / itableMethodEntry::size(); | 676 _size_method_table = (end - method_entry) / itableMethodEntry::size(); |
734 assert(_table_offset >= 0 && _size_offset_table >= 0 && _size_method_table >= 0, "wrong computation"); | 677 assert(_table_offset >= 0 && _size_offset_table >= 0 && _size_method_table >= 0, "wrong computation"); |
735 return; | 678 return; |
736 } | 679 } |
739 // The length of the itable was either zero, or it has not yet been initialized. | 682 // The length of the itable was either zero, or it has not yet been initialized. |
740 _table_offset = 0; | 683 _table_offset = 0; |
741 _size_offset_table = 0; | 684 _size_offset_table = 0; |
742 _size_method_table = 0; | 685 _size_method_table = 0; |
743 } | 686 } |
744 | |
745 // Garbage Collection | |
746 | |
747 void klassItable::oop_follow_contents() { | |
748 // offset table | |
749 itableOffsetEntry* ioe = offset_entry(0); | |
750 for(int i = 0; i < _size_offset_table; i++) { | |
751 MarkSweep::mark_and_push((oop*)&ioe->_interface); | |
752 ioe++; | |
753 } | |
754 | |
755 // method table | |
756 itableMethodEntry* ime = method_entry(0); | |
757 for(int j = 0; j < _size_method_table; j++) { | |
758 MarkSweep::mark_and_push((oop*)&ime->_method); | |
759 ime++; | |
760 } | |
761 } | |
762 | |
763 #ifndef SERIALGC | |
764 void klassItable::oop_follow_contents(ParCompactionManager* cm) { | |
765 // offset table | |
766 itableOffsetEntry* ioe = offset_entry(0); | |
767 for(int i = 0; i < _size_offset_table; i++) { | |
768 PSParallelCompact::mark_and_push(cm, (oop*)&ioe->_interface); | |
769 ioe++; | |
770 } | |
771 | |
772 // method table | |
773 itableMethodEntry* ime = method_entry(0); | |
774 for(int j = 0; j < _size_method_table; j++) { | |
775 PSParallelCompact::mark_and_push(cm, (oop*)&ime->_method); | |
776 ime++; | |
777 } | |
778 } | |
779 #endif // SERIALGC | |
780 | |
781 void klassItable::oop_adjust_pointers() { | |
782 // offset table | |
783 itableOffsetEntry* ioe = offset_entry(0); | |
784 for(int i = 0; i < _size_offset_table; i++) { | |
785 MarkSweep::adjust_pointer((oop*)&ioe->_interface); | |
786 ioe++; | |
787 } | |
788 | |
789 // method table | |
790 itableMethodEntry* ime = method_entry(0); | |
791 for(int j = 0; j < _size_method_table; j++) { | |
792 MarkSweep::adjust_pointer((oop*)&ime->_method); | |
793 ime++; | |
794 } | |
795 } | |
796 | |
797 #ifndef SERIALGC | |
798 void klassItable::oop_update_pointers(ParCompactionManager* cm) { | |
799 // offset table | |
800 itableOffsetEntry* ioe = offset_entry(0); | |
801 for(int i = 0; i < _size_offset_table; i++) { | |
802 PSParallelCompact::adjust_pointer((oop*)&ioe->_interface); | |
803 ioe++; | |
804 } | |
805 | |
806 // method table | |
807 itableMethodEntry* ime = method_entry(0); | |
808 for(int j = 0; j < _size_method_table; j++) { | |
809 PSParallelCompact::adjust_pointer((oop*)&ime->_method); | |
810 ime++; | |
811 } | |
812 } | |
813 #endif // SERIALGC | |
814 | |
815 // Iterators | |
816 void klassItable::oop_oop_iterate(OopClosure* blk) { | |
817 // offset table | |
818 itableOffsetEntry* ioe = offset_entry(0); | |
819 for(int i = 0; i < _size_offset_table; i++) { | |
820 blk->do_oop((oop*)&ioe->_interface); | |
821 ioe++; | |
822 } | |
823 | |
824 // method table | |
825 itableMethodEntry* ime = method_entry(0); | |
826 for(int j = 0; j < _size_method_table; j++) { | |
827 blk->do_oop((oop*)&ime->_method); | |
828 ime++; | |
829 } | |
830 } | |
831 | |
832 void klassItable::oop_oop_iterate_m(OopClosure* blk, MemRegion mr) { | |
833 // offset table | |
834 itableOffsetEntry* ioe = offset_entry(0); | |
835 for(int i = 0; i < _size_offset_table; i++) { | |
836 oop* adr = (oop*)&ioe->_interface; | |
837 if (mr.contains(adr)) blk->do_oop(adr); | |
838 ioe++; | |
839 } | |
840 | |
841 // method table | |
842 itableMethodEntry* ime = method_entry(0); | |
843 for(int j = 0; j < _size_method_table; j++) { | |
844 oop* adr = (oop*)&ime->_method; | |
845 if (mr.contains(adr)) blk->do_oop(adr); | |
846 ime++; | |
847 } | |
848 } | |
849 | |
850 | 687 |
851 static int initialize_count = 0; | 688 static int initialize_count = 0; |
852 | 689 |
853 // Initialization | 690 // Initialization |
854 void klassItable::initialize_itable(bool checkconstraints, TRAPS) { | 691 void klassItable::initialize_itable(bool checkconstraints, TRAPS) { |
868 | 705 |
869 // Iterate through all interfaces | 706 // Iterate through all interfaces |
870 int i; | 707 int i; |
871 for(i = 0; i < num_interfaces; i++) { | 708 for(i = 0; i < num_interfaces; i++) { |
872 itableOffsetEntry* ioe = offset_entry(i); | 709 itableOffsetEntry* ioe = offset_entry(i); |
710 HandleMark hm(THREAD); | |
873 KlassHandle interf_h (THREAD, ioe->interface_klass()); | 711 KlassHandle interf_h (THREAD, ioe->interface_klass()); |
874 assert(interf_h() != NULL && ioe->offset() != 0, "bad offset entry in itable"); | 712 assert(interf_h() != NULL && ioe->offset() != 0, "bad offset entry in itable"); |
875 initialize_itable_for_interface(ioe->offset(), interf_h, checkconstraints, CHECK); | 713 initialize_itable_for_interface(ioe->offset(), interf_h, checkconstraints, CHECK); |
876 } | 714 } |
877 | 715 |
881 guarantee(ioe->interface_klass() == NULL && ioe->offset() == 0, "terminator entry missing"); | 719 guarantee(ioe->interface_klass() == NULL && ioe->offset() == 0, "terminator entry missing"); |
882 } | 720 } |
883 | 721 |
884 | 722 |
885 void klassItable::initialize_itable_for_interface(int method_table_offset, KlassHandle interf_h, bool checkconstraints, TRAPS) { | 723 void klassItable::initialize_itable_for_interface(int method_table_offset, KlassHandle interf_h, bool checkconstraints, TRAPS) { |
886 objArrayHandle methods(THREAD, instanceKlass::cast(interf_h())->methods()); | 724 Array<Method*>* methods = InstanceKlass::cast(interf_h())->methods(); |
887 int nof_methods = methods()->length(); | 725 int nof_methods = methods->length(); |
888 HandleMark hm; | 726 HandleMark hm; |
889 KlassHandle klass = _klass; | 727 KlassHandle klass = _klass; |
890 assert(nof_methods > 0, "at least one method must exist for interface to be in vtable"); | 728 assert(nof_methods > 0, "at least one method must exist for interface to be in vtable"); |
891 Handle interface_loader (THREAD, instanceKlass::cast(interf_h())->class_loader()); | 729 Handle interface_loader (THREAD, InstanceKlass::cast(interf_h())->class_loader()); |
892 int ime_num = 0; | 730 int ime_num = 0; |
893 | 731 |
894 // Skip first methodOop if it is a class initializer | 732 // Skip first Method* if it is a class initializer |
895 int i = ((methodOop)methods()->obj_at(0))->is_static_initializer() ? 1 : 0; | 733 int i = methods->at(0)->is_static_initializer() ? 1 : 0; |
896 | 734 |
897 // m, method_name, method_signature, klass reset each loop so they | 735 // m, method_name, method_signature, klass reset each loop so they |
898 // don't need preserving across check_signature_loaders call | 736 // don't need preserving across check_signature_loaders call |
899 // methods needs a handle in case of gc from check_signature_loaders | 737 // methods needs a handle in case of gc from check_signature_loaders |
900 for(; i < nof_methods; i++) { | 738 for(; i < nof_methods; i++) { |
901 methodOop m = (methodOop)methods()->obj_at(i); | 739 Method* m = methods->at(i); |
902 Symbol* method_name = m->name(); | 740 Symbol* method_name = m->name(); |
903 Symbol* method_signature = m->signature(); | 741 Symbol* method_signature = m->signature(); |
904 | 742 |
905 // This is same code as in Linkresolver::lookup_instance_method_in_klasses | 743 // This is same code as in Linkresolver::lookup_instance_method_in_klasses |
906 methodOop target = klass->uncached_lookup_method(method_name, method_signature); | 744 Method* target = klass->uncached_lookup_method(method_name, method_signature); |
907 while (target != NULL && target->is_static()) { | 745 while (target != NULL && target->is_static()) { |
908 // continue with recursive lookup through the superclass | 746 // continue with recursive lookup through the superclass |
909 klassOop super = Klass::cast(target->method_holder())->super(); | 747 Klass* super = Klass::cast(target->method_holder())->super(); |
910 target = (super == NULL) ? methodOop(NULL) : Klass::cast(super)->uncached_lookup_method(method_name, method_signature); | 748 target = (super == NULL) ? (Method*)NULL : Klass::cast(super)->uncached_lookup_method(method_name, method_signature); |
911 } | 749 } |
912 if (target == NULL || !target->is_public() || target->is_abstract()) { | 750 if (target == NULL || !target->is_public() || target->is_abstract()) { |
913 // Entry do not resolve. Leave it empty | 751 // Entry do not resolve. Leave it empty |
914 } else { | 752 } else { |
915 // Entry did resolve, check loader constraints before initializing | 753 // Entry did resolve, check loader constraints before initializing |
916 // if checkconstraints requested | 754 // if checkconstraints requested |
917 methodHandle target_h (THREAD, target); // preserve across gc | 755 methodHandle target_h (THREAD, target); // preserve across gc |
918 if (checkconstraints) { | 756 if (checkconstraints) { |
919 Handle method_holder_loader (THREAD, instanceKlass::cast(target->method_holder())->class_loader()); | 757 Handle method_holder_loader (THREAD, InstanceKlass::cast(target->method_holder())->class_loader()); |
920 if (method_holder_loader() != interface_loader()) { | 758 if (method_holder_loader() != interface_loader()) { |
921 ResourceMark rm(THREAD); | 759 ResourceMark rm(THREAD); |
922 char* failed_type_name = | 760 char* failed_type_name = |
923 SystemDictionary::check_signature_loaders(method_signature, | 761 SystemDictionary::check_signature_loaders(method_signature, |
924 method_holder_loader, | 762 method_holder_loader, |
933 "used in the signature"; | 771 "used in the signature"; |
934 char* sig = target_h()->name_and_sig_as_C_string(); | 772 char* sig = target_h()->name_and_sig_as_C_string(); |
935 const char* loader1 = SystemDictionary::loader_name(method_holder_loader()); | 773 const char* loader1 = SystemDictionary::loader_name(method_holder_loader()); |
936 char* current = klass->name()->as_C_string(); | 774 char* current = klass->name()->as_C_string(); |
937 const char* loader2 = SystemDictionary::loader_name(interface_loader()); | 775 const char* loader2 = SystemDictionary::loader_name(interface_loader()); |
938 char* iface = instanceKlass::cast(interf_h())->name()->as_C_string(); | 776 char* iface = InstanceKlass::cast(interf_h())->name()->as_C_string(); |
939 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + | 777 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + |
940 strlen(current) + strlen(loader2) + strlen(iface) + | 778 strlen(current) + strlen(loader2) + strlen(iface) + |
941 strlen(failed_type_name); | 779 strlen(failed_type_name); |
942 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); | 780 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); |
943 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, | 781 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, |
953 // Progress to next entry | 791 // Progress to next entry |
954 ime_num++; | 792 ime_num++; |
955 } | 793 } |
956 } | 794 } |
957 | 795 |
958 // Update entry for specific methodOop | 796 // Update entry for specific Method* |
959 void klassItable::initialize_with_method(methodOop m) { | 797 void klassItable::initialize_with_method(Method* m) { |
960 itableMethodEntry* ime = method_entry(0); | 798 itableMethodEntry* ime = method_entry(0); |
961 for(int i = 0; i < _size_method_table; i++) { | 799 for(int i = 0; i < _size_method_table; i++) { |
962 if (ime->method() == m) { | 800 if (ime->method() == m) { |
963 ime->initialize(m); | 801 ime->initialize(m); |
964 } | 802 } |
965 ime++; | 803 ime++; |
966 } | 804 } |
967 } | 805 } |
968 | 806 |
969 void klassItable::adjust_method_entries(methodOop* old_methods, methodOop* new_methods, | 807 void klassItable::adjust_method_entries(Method** old_methods, Method** new_methods, |
970 int methods_length, bool * trace_name_printed) { | 808 int methods_length, bool * trace_name_printed) { |
971 // search the itable for uses of either obsolete or EMCP methods | 809 // search the itable for uses of either obsolete or EMCP methods |
972 for (int j = 0; j < methods_length; j++) { | 810 for (int j = 0; j < methods_length; j++) { |
973 methodOop old_method = old_methods[j]; | 811 Method* old_method = old_methods[j]; |
974 methodOop new_method = new_methods[j]; | 812 Method* new_method = new_methods[j]; |
975 itableMethodEntry* ime = method_entry(0); | 813 itableMethodEntry* ime = method_entry(0); |
976 | 814 |
977 // The itable can describe more than one interface and the same | 815 // The itable can describe more than one interface and the same |
978 // method signature can be specified by more than one interface. | 816 // method signature can be specified by more than one interface. |
979 // This means we have to do an exhaustive search to find all the | 817 // This means we have to do an exhaustive search to find all the |
992 // RC_TRACE macro has an embedded ResourceMark | 830 // RC_TRACE macro has an embedded ResourceMark |
993 RC_TRACE(0x00200000, ("itable method update: %s(%s)", | 831 RC_TRACE(0x00200000, ("itable method update: %s(%s)", |
994 new_method->name()->as_C_string(), | 832 new_method->name()->as_C_string(), |
995 new_method->signature()->as_C_string())); | 833 new_method->signature()->as_C_string())); |
996 } | 834 } |
997 break; | 835 // Cannot break because there might be another entry for this method |
998 } | 836 } |
999 ime++; | 837 ime++; |
1000 } | 838 } |
1001 } | 839 } |
1002 } | 840 } |
1003 | 841 |
1004 | 842 |
1005 // Setup | 843 // Setup |
1006 class InterfaceVisiterClosure : public StackObj { | 844 class InterfaceVisiterClosure : public StackObj { |
1007 public: | 845 public: |
1008 virtual void doit(klassOop intf, int method_count) = 0; | 846 virtual void doit(Klass* intf, int method_count) = 0; |
1009 }; | 847 }; |
1010 | 848 |
1011 // Visit all interfaces with at-least one method (excluding <clinit>) | 849 // Visit all interfaces with at-least one method (excluding <clinit>) |
1012 void visit_all_interfaces(objArrayOop transitive_intf, InterfaceVisiterClosure *blk) { | 850 void visit_all_interfaces(Array<Klass*>* transitive_intf, InterfaceVisiterClosure *blk) { |
1013 // Handle array argument | 851 // Handle array argument |
1014 for(int i = 0; i < transitive_intf->length(); i++) { | 852 for(int i = 0; i < transitive_intf->length(); i++) { |
1015 klassOop intf = (klassOop)transitive_intf->obj_at(i); | 853 Klass* intf = transitive_intf->at(i); |
1016 assert(Klass::cast(intf)->is_interface(), "sanity check"); | 854 assert(Klass::cast(intf)->is_interface(), "sanity check"); |
1017 | 855 |
1018 // Find no. of methods excluding a <clinit> | 856 // Find no. of methods excluding a <clinit> |
1019 int method_count = instanceKlass::cast(intf)->methods()->length(); | 857 int method_count = InstanceKlass::cast(intf)->methods()->length(); |
1020 if (method_count > 0) { | 858 if (method_count > 0) { |
1021 methodOop m = (methodOop)instanceKlass::cast(intf)->methods()->obj_at(0); | 859 Method* m = InstanceKlass::cast(intf)->methods()->at(0); |
1022 assert(m != NULL && m->is_method(), "sanity check"); | 860 assert(m != NULL && m->is_method(), "sanity check"); |
1023 if (m->name() == vmSymbols::object_initializer_name()) { | 861 if (m->name() == vmSymbols::object_initializer_name()) { |
1024 method_count--; | 862 method_count--; |
1025 } | 863 } |
1026 } | 864 } |
1040 CountInterfacesClosure() { _nof_methods = 0; _nof_interfaces = 0; } | 878 CountInterfacesClosure() { _nof_methods = 0; _nof_interfaces = 0; } |
1041 | 879 |
1042 int nof_methods() const { return _nof_methods; } | 880 int nof_methods() const { return _nof_methods; } |
1043 int nof_interfaces() const { return _nof_interfaces; } | 881 int nof_interfaces() const { return _nof_interfaces; } |
1044 | 882 |
1045 void doit(klassOop intf, int method_count) { _nof_methods += method_count; _nof_interfaces++; } | 883 void doit(Klass* intf, int method_count) { _nof_methods += method_count; _nof_interfaces++; } |
1046 }; | 884 }; |
1047 | 885 |
1048 class SetupItableClosure : public InterfaceVisiterClosure { | 886 class SetupItableClosure : public InterfaceVisiterClosure { |
1049 private: | 887 private: |
1050 itableOffsetEntry* _offset_entry; | 888 itableOffsetEntry* _offset_entry; |
1057 _method_entry = method_entry; | 895 _method_entry = method_entry; |
1058 } | 896 } |
1059 | 897 |
1060 itableMethodEntry* method_entry() const { return _method_entry; } | 898 itableMethodEntry* method_entry() const { return _method_entry; } |
1061 | 899 |
1062 void doit(klassOop intf, int method_count) { | 900 void doit(Klass* intf, int method_count) { |
1063 int offset = ((address)_method_entry) - _klass_begin; | 901 int offset = ((address)_method_entry) - _klass_begin; |
1064 _offset_entry->initialize(intf, offset); | 902 _offset_entry->initialize(intf, offset); |
1065 _offset_entry++; | 903 _offset_entry++; |
1066 _method_entry += method_count; | 904 _method_entry += method_count; |
1067 } | 905 } |
1068 }; | 906 }; |
1069 | 907 |
1070 int klassItable::compute_itable_size(objArrayHandle transitive_interfaces) { | 908 int klassItable::compute_itable_size(Array<Klass*>* transitive_interfaces) { |
1071 // Count no of interfaces and total number of interface methods | 909 // Count no of interfaces and total number of interface methods |
1072 CountInterfacesClosure cic; | 910 CountInterfacesClosure cic; |
1073 visit_all_interfaces(transitive_interfaces(), &cic); | 911 visit_all_interfaces(transitive_interfaces, &cic); |
1074 | 912 |
1075 // There's alway an extra itable entry so we can null-terminate it. | 913 // There's alway an extra itable entry so we can null-terminate it. |
1076 int itable_size = calc_itable_size(cic.nof_interfaces() + 1, cic.nof_methods()); | 914 int itable_size = calc_itable_size(cic.nof_interfaces() + 1, cic.nof_methods()); |
1077 | 915 |
1078 // Statistics | 916 // Statistics |
1094 int nof_interfaces = cic.nof_interfaces(); | 932 int nof_interfaces = cic.nof_interfaces(); |
1095 | 933 |
1096 // Add one extra entry so we can null-terminate the table | 934 // Add one extra entry so we can null-terminate the table |
1097 nof_interfaces++; | 935 nof_interfaces++; |
1098 | 936 |
1099 assert(compute_itable_size(objArrayHandle(klass->transitive_interfaces())) == | 937 assert(compute_itable_size(klass->transitive_interfaces()) == |
1100 calc_itable_size(nof_interfaces, nof_methods), | 938 calc_itable_size(nof_interfaces, nof_methods), |
1101 "mismatch calculation of itable size"); | 939 "mismatch calculation of itable size"); |
1102 | 940 |
1103 // Fill-out offset table | 941 // Fill-out offset table |
1104 itableOffsetEntry* ioe = (itableOffsetEntry*)klass->start_of_itable(); | 942 itableOffsetEntry* ioe = (itableOffsetEntry*)klass->start_of_itable(); |
1106 intptr_t* end = klass->end_of_itable(); | 944 intptr_t* end = klass->end_of_itable(); |
1107 assert((oop*)(ime + nof_methods) <= (oop*)klass->start_of_nonstatic_oop_maps(), "wrong offset calculation (1)"); | 945 assert((oop*)(ime + nof_methods) <= (oop*)klass->start_of_nonstatic_oop_maps(), "wrong offset calculation (1)"); |
1108 assert((oop*)(end) == (oop*)(ime + nof_methods), "wrong offset calculation (2)"); | 946 assert((oop*)(end) == (oop*)(ime + nof_methods), "wrong offset calculation (2)"); |
1109 | 947 |
1110 // Visit all interfaces and initialize itable offset table | 948 // Visit all interfaces and initialize itable offset table |
1111 SetupItableClosure sic((address)klass->as_klassOop(), ioe, ime); | 949 SetupItableClosure sic((address)klass(), ioe, ime); |
1112 visit_all_interfaces(klass->transitive_interfaces(), &sic); | 950 visit_all_interfaces(klass->transitive_interfaces(), &sic); |
1113 | 951 |
1114 #ifdef ASSERT | 952 #ifdef ASSERT |
1115 ime = sic.method_entry(); | 953 ime = sic.method_entry(); |
1116 oop* v = (oop*) klass->end_of_itable(); | 954 oop* v = (oop*) klass->end_of_itable(); |
1118 #endif | 956 #endif |
1119 } | 957 } |
1120 | 958 |
1121 | 959 |
1122 // m must be a method in an interface | 960 // m must be a method in an interface |
1123 int klassItable::compute_itable_index(methodOop m) { | 961 int klassItable::compute_itable_index(Method* m) { |
1124 klassOop intf = m->method_holder(); | 962 Klass* intf = m->method_holder(); |
1125 assert(instanceKlass::cast(intf)->is_interface(), "sanity check"); | 963 assert(InstanceKlass::cast(intf)->is_interface(), "sanity check"); |
1126 objArrayOop methods = instanceKlass::cast(intf)->methods(); | 964 Array<Method*>* methods = InstanceKlass::cast(intf)->methods(); |
1127 int index = 0; | 965 int index = 0; |
1128 while(methods->obj_at(index) != m) { | 966 while(methods->at(index) != m) { |
1129 index++; | 967 index++; |
1130 assert(index < methods->length(), "should find index for resolve_invoke"); | 968 assert(index < methods->length(), "should find index for resolve_invoke"); |
1131 } | 969 } |
1132 // Adjust for <clinit>, which is left out of table if first method | 970 // Adjust for <clinit>, which is left out of table if first method |
1133 if (methods->length() > 0 && ((methodOop)methods->obj_at(0))->is_static_initializer()) { | 971 if (methods->length() > 0 && methods->at(0)->is_static_initializer()) { |
1134 index--; | 972 index--; |
1135 } | 973 } |
1136 return index; | 974 return index; |
1137 } | 975 } |
1138 | 976 |
1139 | 977 |
1140 // inverse to compute_itable_index | 978 // inverse to compute_itable_index |
1141 methodOop klassItable::method_for_itable_index(klassOop intf, int itable_index) { | 979 Method* klassItable::method_for_itable_index(Klass* intf, int itable_index) { |
1142 assert(instanceKlass::cast(intf)->is_interface(), "sanity check"); | 980 assert(InstanceKlass::cast(intf)->is_interface(), "sanity check"); |
1143 objArrayOop methods = instanceKlass::cast(intf)->methods(); | 981 Array<Method*>* methods = InstanceKlass::cast(intf)->methods(); |
1144 | 982 |
1145 int index = itable_index; | 983 int index = itable_index; |
1146 // Adjust for <clinit>, which is left out of table if first method | 984 // Adjust for <clinit>, which is left out of table if first method |
1147 if (methods->length() > 0 && ((methodOop)methods->obj_at(0))->is_static_initializer()) { | 985 if (methods->length() > 0 && methods->at(0)->is_static_initializer()) { |
1148 index++; | 986 index++; |
1149 } | 987 } |
1150 | 988 |
1151 if (itable_index < 0 || index >= methods->length()) | 989 if (itable_index < 0 || index >= methods->length()) |
1152 return NULL; // help caller defend against bad indexes | 990 return NULL; // help caller defend against bad indexes |
1153 | 991 |
1154 methodOop m = (methodOop)methods->obj_at(index); | 992 Method* m = methods->at(index); |
1155 assert(compute_itable_index(m) == itable_index, "correct inverse"); | 993 assert(compute_itable_index(m) == itable_index, "correct inverse"); |
1156 | 994 |
1157 return m; | 995 return m; |
1158 } | 996 } |
1159 | 997 |
1172 "end)", _klass->internal_name())); | 1010 "end)", _klass->internal_name())); |
1173 } | 1011 } |
1174 | 1012 |
1175 for (int i = 0; i < _length; i++) table()[i].verify(this, st); | 1013 for (int i = 0; i < _length; i++) table()[i].verify(this, st); |
1176 // verify consistency with superKlass vtable | 1014 // verify consistency with superKlass vtable |
1177 klassOop super = _klass->super(); | 1015 Klass* super = _klass->super(); |
1178 if (super != NULL) { | 1016 if (super != NULL) { |
1179 instanceKlass* sk = instanceKlass::cast(super); | 1017 InstanceKlass* sk = InstanceKlass::cast(super); |
1180 klassVtable* vt = sk->vtable(); | 1018 klassVtable* vt = sk->vtable(); |
1181 for (int i = 0; i < vt->length(); i++) { | 1019 for (int i = 0; i < vt->length(); i++) { |
1182 verify_against(st, vt, i); | 1020 verify_against(st, vt, i); |
1183 } | 1021 } |
1184 } | 1022 } |
1236 static int fixed; // total fixed overhead in bytes | 1074 static int fixed; // total fixed overhead in bytes |
1237 static int filler; // overhead caused by filler bytes | 1075 static int filler; // overhead caused by filler bytes |
1238 static int entries; // total bytes consumed by vtable entries | 1076 static int entries; // total bytes consumed by vtable entries |
1239 static int array_entries; // total bytes consumed by array vtable entries | 1077 static int array_entries; // total bytes consumed by array vtable entries |
1240 | 1078 |
1241 static void do_class(klassOop k) { | 1079 static void do_class(Klass* k) { |
1242 Klass* kl = k->klass_part(); | 1080 Klass* kl = k; |
1243 klassVtable* vt = kl->vtable(); | 1081 klassVtable* vt = kl->vtable(); |
1244 if (vt == NULL) return; | 1082 if (vt == NULL) return; |
1245 no_klasses++; | 1083 no_klasses++; |
1246 if (kl->oop_is_instance()) { | 1084 if (kl->oop_is_instance()) { |
1247 no_instance_klasses++; | 1085 no_instance_klasses++; |
1256 | 1094 |
1257 static void compute() { | 1095 static void compute() { |
1258 SystemDictionary::classes_do(do_class); | 1096 SystemDictionary::classes_do(do_class); |
1259 fixed = no_klasses * oopSize; // vtable length | 1097 fixed = no_klasses * oopSize; // vtable length |
1260 // filler size is a conservative approximation | 1098 // filler size is a conservative approximation |
1261 filler = oopSize * (no_klasses - no_instance_klasses) * (sizeof(instanceKlass) - sizeof(arrayKlass) - 1); | 1099 filler = oopSize * (no_klasses - no_instance_klasses) * (sizeof(InstanceKlass) - sizeof(arrayKlass) - 1); |
1262 entries = sizeof(vtableEntry) * sum_of_vtable_len; | 1100 entries = sizeof(vtableEntry) * sum_of_vtable_len; |
1263 array_entries = sizeof(vtableEntry) * sum_of_array_vtable_len; | 1101 array_entries = sizeof(vtableEntry) * sum_of_array_vtable_len; |
1264 } | 1102 } |
1265 }; | 1103 }; |
1266 | 1104 |
1288 } | 1126 } |
1289 | 1127 |
1290 bool klassVtable::check_no_old_entries() { | 1128 bool klassVtable::check_no_old_entries() { |
1291 // Check that there really is no entry | 1129 // Check that there really is no entry |
1292 for (int i = 0; i < length(); i++) { | 1130 for (int i = 0; i < length(); i++) { |
1293 methodOop m = unchecked_method_at(i); | 1131 Method* m = unchecked_method_at(i); |
1294 if (m != NULL) { | 1132 if (m != NULL) { |
1295 if (m->is_old()) { | 1133 if (!m->is_valid() || m->is_old()) { |
1296 return false; | 1134 return false; |
1297 } | 1135 } |
1298 } | 1136 } |
1299 } | 1137 } |
1300 return true; | 1138 return true; |
1301 } | 1139 } |
1302 | 1140 |
1303 void klassVtable::dump_vtable() { | 1141 void klassVtable::dump_vtable() { |
1304 tty->print_cr("vtable dump --"); | 1142 tty->print_cr("vtable dump --"); |
1305 for (int i = 0; i < length(); i++) { | 1143 for (int i = 0; i < length(); i++) { |
1306 methodOop m = unchecked_method_at(i); | 1144 Method* m = unchecked_method_at(i); |
1307 if (m != NULL) { | 1145 if (m != NULL) { |
1308 tty->print(" (%5d) ", i); | 1146 tty->print(" (%5d) ", i); |
1309 m->access_flags().print_on(tty); | 1147 m->access_flags().print_on(tty); |
1310 tty->print(" -- "); | 1148 tty->print(" -- "); |
1311 m->print_name(tty); | 1149 m->print_name(tty); |
1312 tty->cr(); | 1150 tty->cr(); |
1313 } | 1151 } |
1314 } | 1152 } |
1315 } | 1153 } |
1316 | 1154 |
1155 bool klassItable::check_no_old_entries() { | |
1156 itableMethodEntry* ime = method_entry(0); | |
1157 for(int i = 0; i < _size_method_table; i++) { | |
1158 Method* m = ime->method(); | |
1159 if (m != NULL && (!m->is_valid() || m->is_old())) return false; | |
1160 ime++; | |
1161 } | |
1162 return true; | |
1163 } | |
1164 | |
1317 int klassItable::_total_classes; // Total no. of classes with itables | 1165 int klassItable::_total_classes; // Total no. of classes with itables |
1318 long klassItable::_total_size; // Total no. of bytes used for itables | 1166 long klassItable::_total_size; // Total no. of bytes used for itables |
1319 | 1167 |
1320 void klassItable::print_statistics() { | 1168 void klassItable::print_statistics() { |
1321 tty->print_cr("itable statistics:"); | 1169 tty->print_cr("itable statistics:"); |