Mercurial > hg > truffle
annotate src/share/vm/classfile/defaultMethods.cpp @ 12355:cefad50507d8
Merge with hs25-b53
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Fri, 11 Oct 2013 10:38:03 +0200 |
| parents | d416f67d6f91 268e7a2178d7 |
| children | 096c224171c4 |
| rev | line source |
|---|---|
| 6934 | 1 /* |
| 8031 | 2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| 6934 | 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 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "classfile/bytecodeAssembler.hpp" | |
| 27 #include "classfile/defaultMethods.hpp" | |
| 28 #include "classfile/symbolTable.hpp" | |
| 29 #include "memory/allocation.hpp" | |
| 30 #include "memory/metadataFactory.hpp" | |
| 31 #include "memory/resourceArea.hpp" | |
| 32 #include "runtime/signature.hpp" | |
| 33 #include "runtime/thread.hpp" | |
| 34 #include "oops/instanceKlass.hpp" | |
| 35 #include "oops/klass.hpp" | |
| 36 #include "oops/method.hpp" | |
| 37 #include "utilities/accessFlags.hpp" | |
| 38 #include "utilities/exceptions.hpp" | |
| 39 #include "utilities/ostream.hpp" | |
| 40 #include "utilities/pair.hpp" | |
| 41 #include "utilities/resourceHash.hpp" | |
| 42 | |
| 43 typedef enum { QUALIFIED, DISQUALIFIED } QualifiedState; | |
| 44 | |
| 45 // Because we use an iterative algorithm when iterating over the type | |
| 46 // hierarchy, we can't use traditional scoped objects which automatically do | |
| 47 // cleanup in the destructor when the scope is exited. PseudoScope (and | |
| 48 // PseudoScopeMark) provides a similar functionality, but for when you want a | |
| 49 // scoped object in non-stack memory (such as in resource memory, as we do | |
| 50 // here). You've just got to remember to call 'destroy()' on the scope when | |
| 51 // leaving it (and marks have to be explicitly added). | |
| 52 class PseudoScopeMark : public ResourceObj { | |
| 53 public: | |
| 54 virtual void destroy() = 0; | |
| 55 }; | |
| 56 | |
| 57 class PseudoScope : public ResourceObj { | |
| 58 private: | |
| 59 GrowableArray<PseudoScopeMark*> _marks; | |
| 60 public: | |
| 61 | |
| 62 static PseudoScope* cast(void* data) { | |
| 63 return static_cast<PseudoScope*>(data); | |
| 64 } | |
| 65 | |
| 66 void add_mark(PseudoScopeMark* psm) { | |
| 67 _marks.append(psm); | |
| 68 } | |
| 69 | |
| 70 void destroy() { | |
| 71 for (int i = 0; i < _marks.length(); ++i) { | |
| 72 _marks.at(i)->destroy(); | |
| 73 } | |
| 74 } | |
| 75 }; | |
| 76 | |
| 77 #ifndef PRODUCT | |
| 78 static void print_slot(outputStream* str, Symbol* name, Symbol* signature) { | |
| 79 ResourceMark rm; | |
| 80 str->print("%s%s", name->as_C_string(), signature->as_C_string()); | |
| 81 } | |
| 82 | |
| 83 static void print_method(outputStream* str, Method* mo, bool with_class=true) { | |
| 84 ResourceMark rm; | |
| 85 if (with_class) { | |
| 86 str->print("%s.", mo->klass_name()->as_C_string()); | |
| 87 } | |
| 88 print_slot(str, mo->name(), mo->signature()); | |
| 89 } | |
| 90 #endif // ndef PRODUCT | |
| 91 | |
| 92 /** | |
| 93 * Perform a depth-first iteration over the class hierarchy, applying | |
| 94 * algorithmic logic as it goes. | |
| 95 * | |
| 96 * This class is one half of the inheritance hierarchy analysis mechanism. | |
| 97 * It is meant to be used in conjunction with another class, the algorithm, | |
| 98 * which is indicated by the ALGO template parameter. This class can be | |
| 99 * paired with any algorithm class that provides the required methods. | |
| 100 * | |
| 101 * This class contains all the mechanics for iterating over the class hierarchy | |
| 102 * starting at a particular root, without recursing (thus limiting stack growth | |
| 103 * from this point). It visits each superclass (if present) and superinterface | |
| 104 * in a depth-first manner, with callbacks to the ALGO class as each class is | |
| 105 * encountered (visit()), The algorithm can cut-off further exploration of a | |
| 106 * particular branch by returning 'false' from a visit() call. | |
| 107 * | |
| 108 * The ALGO class, must provide a visit() method, which each of which will be | |
| 109 * called once for each node in the inheritance tree during the iteration. In | |
| 110 * addition, it can provide a memory block via new_node_data(InstanceKlass*), | |
| 111 * which it can use for node-specific storage (and access via the | |
| 112 * current_data() and data_at_depth(int) methods). | |
| 113 * | |
| 114 * Bare minimum needed to be an ALGO class: | |
| 115 * class Algo : public HierarchyVisitor<Algo> { | |
| 116 * void* new_node_data(InstanceKlass* cls) { return NULL; } | |
| 117 * void free_node_data(void* data) { return; } | |
| 118 * bool visit() { return true; } | |
| 119 * }; | |
| 120 */ | |
| 121 template <class ALGO> | |
| 122 class HierarchyVisitor : StackObj { | |
| 123 private: | |
| 124 | |
| 125 class Node : public ResourceObj { | |
| 126 public: | |
| 127 InstanceKlass* _class; | |
| 128 bool _super_was_visited; | |
| 129 int _interface_index; | |
| 130 void* _algorithm_data; | |
| 131 | |
| 132 Node(InstanceKlass* cls, void* data, bool visit_super) | |
| 133 : _class(cls), _super_was_visited(!visit_super), | |
| 134 _interface_index(0), _algorithm_data(data) {} | |
| 135 | |
| 136 int number_of_interfaces() { return _class->local_interfaces()->length(); } | |
| 137 int interface_index() { return _interface_index; } | |
| 138 void set_super_visited() { _super_was_visited = true; } | |
| 139 void increment_visited_interface() { ++_interface_index; } | |
| 140 void set_all_interfaces_visited() { | |
| 141 _interface_index = number_of_interfaces(); | |
| 142 } | |
| 143 bool has_visited_super() { return _super_was_visited; } | |
| 144 bool has_visited_all_interfaces() { | |
| 145 return interface_index() >= number_of_interfaces(); | |
| 146 } | |
| 147 InstanceKlass* interface_at(int index) { | |
| 148 return InstanceKlass::cast(_class->local_interfaces()->at(index)); | |
| 149 } | |
| 150 InstanceKlass* next_super() { return _class->java_super(); } | |
| 151 InstanceKlass* next_interface() { | |
| 152 return interface_at(interface_index()); | |
| 153 } | |
| 154 }; | |
| 155 | |
| 156 bool _cancelled; | |
| 157 GrowableArray<Node*> _path; | |
| 158 | |
| 159 Node* current_top() const { return _path.top(); } | |
| 160 bool has_more_nodes() const { return !_path.is_empty(); } | |
| 161 void push(InstanceKlass* cls, void* data) { | |
| 162 assert(cls != NULL, "Requires a valid instance class"); | |
| 163 Node* node = new Node(cls, data, has_super(cls)); | |
| 164 _path.push(node); | |
| 165 } | |
| 166 void pop() { _path.pop(); } | |
| 167 | |
| 168 void reset_iteration() { | |
| 169 _cancelled = false; | |
| 170 _path.clear(); | |
| 171 } | |
| 172 bool is_cancelled() const { return _cancelled; } | |
| 173 | |
| 174 static bool has_super(InstanceKlass* cls) { | |
| 175 return cls->super() != NULL && !cls->is_interface(); | |
| 176 } | |
| 177 | |
| 178 Node* node_at_depth(int i) const { | |
| 179 return (i >= _path.length()) ? NULL : _path.at(_path.length() - i - 1); | |
| 180 } | |
| 181 | |
| 182 protected: | |
| 183 | |
| 184 // Accessors available to the algorithm | |
| 185 int current_depth() const { return _path.length() - 1; } | |
| 186 | |
| 187 InstanceKlass* class_at_depth(int i) { | |
| 188 Node* n = node_at_depth(i); | |
| 189 return n == NULL ? NULL : n->_class; | |
| 190 } | |
| 191 InstanceKlass* current_class() { return class_at_depth(0); } | |
| 192 | |
| 193 void* data_at_depth(int i) { | |
| 194 Node* n = node_at_depth(i); | |
| 195 return n == NULL ? NULL : n->_algorithm_data; | |
| 196 } | |
| 197 void* current_data() { return data_at_depth(0); } | |
| 198 | |
| 199 void cancel_iteration() { _cancelled = true; } | |
| 200 | |
| 201 public: | |
| 202 | |
| 203 void run(InstanceKlass* root) { | |
| 204 ALGO* algo = static_cast<ALGO*>(this); | |
| 205 | |
| 206 reset_iteration(); | |
| 207 | |
| 208 void* algo_data = algo->new_node_data(root); | |
| 209 push(root, algo_data); | |
| 210 bool top_needs_visit = true; | |
| 211 | |
| 212 do { | |
| 213 Node* top = current_top(); | |
| 214 if (top_needs_visit) { | |
| 215 if (algo->visit() == false) { | |
| 216 // algorithm does not want to continue along this path. Arrange | |
| 217 // it so that this state is immediately popped off the stack | |
| 218 top->set_super_visited(); | |
| 219 top->set_all_interfaces_visited(); | |
| 220 } | |
| 221 top_needs_visit = false; | |
| 222 } | |
| 223 | |
| 224 if (top->has_visited_super() && top->has_visited_all_interfaces()) { | |
| 225 algo->free_node_data(top->_algorithm_data); | |
| 226 pop(); | |
| 227 } else { | |
| 228 InstanceKlass* next = NULL; | |
| 229 if (top->has_visited_super() == false) { | |
| 230 next = top->next_super(); | |
| 231 top->set_super_visited(); | |
| 232 } else { | |
| 233 next = top->next_interface(); | |
| 234 top->increment_visited_interface(); | |
| 235 } | |
| 236 assert(next != NULL, "Otherwise we shouldn't be here"); | |
| 237 algo_data = algo->new_node_data(next); | |
| 238 push(next, algo_data); | |
| 239 top_needs_visit = true; | |
| 240 } | |
| 241 } while (!is_cancelled() && has_more_nodes()); | |
| 242 } | |
| 243 }; | |
| 244 | |
| 245 #ifndef PRODUCT | |
| 246 class PrintHierarchy : public HierarchyVisitor<PrintHierarchy> { | |
| 247 public: | |
| 248 | |
| 249 bool visit() { | |
| 250 InstanceKlass* cls = current_class(); | |
| 251 streamIndentor si(tty, current_depth() * 2); | |
| 252 tty->indent().print_cr("%s", cls->name()->as_C_string()); | |
| 253 return true; | |
| 254 } | |
| 255 | |
| 256 void* new_node_data(InstanceKlass* cls) { return NULL; } | |
| 257 void free_node_data(void* data) { return; } | |
| 258 }; | |
| 259 #endif // ndef PRODUCT | |
| 260 | |
| 261 // Used to register InstanceKlass objects and all related metadata structures | |
| 262 // (Methods, ConstantPools) as "in-use" by the current thread so that they can't | |
| 263 // be deallocated by class redefinition while we're using them. The classes are | |
| 264 // de-registered when this goes out of scope. | |
| 265 // | |
| 266 // Once a class is registered, we need not bother with methodHandles or | |
| 267 // constantPoolHandles for it's associated metadata. | |
| 268 class KeepAliveRegistrar : public StackObj { | |
| 269 private: | |
| 270 Thread* _thread; | |
| 271 GrowableArray<ConstantPool*> _keep_alive; | |
| 272 | |
| 273 public: | |
| 274 KeepAliveRegistrar(Thread* thread) : _thread(thread), _keep_alive(20) { | |
| 275 assert(thread == Thread::current(), "Must be current thread"); | |
| 276 } | |
| 277 | |
| 278 ~KeepAliveRegistrar() { | |
| 279 for (int i = _keep_alive.length() - 1; i >= 0; --i) { | |
| 280 ConstantPool* cp = _keep_alive.at(i); | |
| 281 int idx = _thread->metadata_handles()->find_from_end(cp); | |
| 282 assert(idx > 0, "Must be in the list"); | |
| 283 _thread->metadata_handles()->remove_at(idx); | |
| 284 } | |
| 285 } | |
| 286 | |
| 287 // Register a class as 'in-use' by the thread. It's fine to register a class | |
| 288 // multiple times (though perhaps inefficient) | |
| 289 void register_class(InstanceKlass* ik) { | |
| 290 ConstantPool* cp = ik->constants(); | |
| 291 _keep_alive.push(cp); | |
| 292 _thread->metadata_handles()->push(cp); | |
| 293 } | |
| 294 }; | |
| 295 | |
| 296 class KeepAliveVisitor : public HierarchyVisitor<KeepAliveVisitor> { | |
| 297 private: | |
| 298 KeepAliveRegistrar* _registrar; | |
| 299 | |
| 300 public: | |
| 301 KeepAliveVisitor(KeepAliveRegistrar* registrar) : _registrar(registrar) {} | |
| 302 | |
| 303 void* new_node_data(InstanceKlass* cls) { return NULL; } | |
| 304 void free_node_data(void* data) { return; } | |
| 305 | |
| 306 bool visit() { | |
| 307 _registrar->register_class(current_class()); | |
| 308 return true; | |
| 309 } | |
| 310 }; | |
| 311 | |
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312 |
| 6934 | 313 // A method family contains a set of all methods that implement a single |
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314 // erased method. As members of the set are collected while walking over the |
| 6934 | 315 // hierarchy, they are tagged with a qualification state. The qualification |
| 316 // state for an erased method is set to disqualified if there exists a path | |
| 317 // from the root of hierarchy to the method that contains an interleaving | |
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318 // erased method defined in an interface. |
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319 |
| 6934 | 320 class MethodFamily : public ResourceObj { |
| 321 private: | |
| 322 | |
| 323 GrowableArray<Pair<Method*,QualifiedState> > _members; | |
| 324 ResourceHashtable<Method*, int> _member_index; | |
| 325 | |
| 326 Method* _selected_target; // Filled in later, if a unique target exists | |
| 327 Symbol* _exception_message; // If no unique target is found | |
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328 Symbol* _exception_name; // If no unique target is found |
| 6934 | 329 |
| 330 bool contains_method(Method* method) { | |
| 331 int* lookup = _member_index.get(method); | |
| 332 return lookup != NULL; | |
| 333 } | |
| 334 | |
| 335 void add_method(Method* method, QualifiedState state) { | |
| 336 Pair<Method*,QualifiedState> entry(method, state); | |
| 337 _member_index.put(method, _members.length()); | |
| 338 _members.append(entry); | |
| 339 } | |
| 340 | |
| 341 void disqualify_method(Method* method) { | |
| 342 int* index = _member_index.get(method); | |
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343 guarantee(index != NULL && *index >= 0 && *index < _members.length(), "bad index"); |
| 6934 | 344 _members.at(*index).second = DISQUALIFIED; |
| 345 } | |
| 346 | |
| 347 Symbol* generate_no_defaults_message(TRAPS) const; | |
| 348 Symbol* generate_abstract_method_message(Method* method, TRAPS) const; | |
| 349 Symbol* generate_conflicts_message(GrowableArray<Method*>* methods, TRAPS) const; | |
| 350 | |
| 351 public: | |
| 352 | |
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353 MethodFamily() |
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354 : _selected_target(NULL), _exception_message(NULL), _exception_name(NULL) {} |
| 6934 | 355 |
| 356 void set_target_if_empty(Method* m) { | |
| 357 if (_selected_target == NULL && !m->is_overpass()) { | |
| 358 _selected_target = m; | |
| 359 } | |
| 360 } | |
| 361 | |
| 362 void record_qualified_method(Method* m) { | |
| 363 // If the method already exists in the set as qualified, this operation is | |
| 364 // redundant. If it already exists as disqualified, then we leave it as | |
| 365 // disqualfied. Thus we only add to the set if it's not already in the | |
| 366 // set. | |
| 367 if (!contains_method(m)) { | |
| 368 add_method(m, QUALIFIED); | |
| 369 } | |
| 370 } | |
| 371 | |
| 372 void record_disqualified_method(Method* m) { | |
| 373 // If not in the set, add it as disqualified. If it's already in the set, | |
| 374 // then set the state to disqualified no matter what the previous state was. | |
| 375 if (!contains_method(m)) { | |
| 376 add_method(m, DISQUALIFIED); | |
| 377 } else { | |
| 378 disqualify_method(m); | |
| 379 } | |
| 380 } | |
| 381 | |
| 382 bool has_target() const { return _selected_target != NULL; } | |
| 383 bool throws_exception() { return _exception_message != NULL; } | |
| 384 | |
| 385 Method* get_selected_target() { return _selected_target; } | |
| 386 Symbol* get_exception_message() { return _exception_message; } | |
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387 Symbol* get_exception_name() { return _exception_name; } |
| 6934 | 388 |
| 389 // Either sets the target or the exception error message | |
| 390 void determine_target(InstanceKlass* root, TRAPS) { | |
| 391 if (has_target() || throws_exception()) { | |
| 392 return; | |
| 393 } | |
| 394 | |
| 395 GrowableArray<Method*> qualified_methods; | |
| 396 for (int i = 0; i < _members.length(); ++i) { | |
| 397 Pair<Method*,QualifiedState> entry = _members.at(i); | |
| 398 if (entry.second == QUALIFIED) { | |
| 399 qualified_methods.append(entry.first); | |
| 400 } | |
| 401 } | |
| 402 | |
| 403 if (qualified_methods.length() == 0) { | |
| 404 _exception_message = generate_no_defaults_message(CHECK); | |
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405 _exception_name = vmSymbols::java_lang_AbstractMethodError(); |
| 6934 | 406 } else if (qualified_methods.length() == 1) { |
| 407 Method* method = qualified_methods.at(0); | |
| 408 if (method->is_abstract()) { | |
| 409 _exception_message = generate_abstract_method_message(method, CHECK); | |
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410 _exception_name = vmSymbols::java_lang_AbstractMethodError(); |
| 6934 | 411 } else { |
| 412 _selected_target = qualified_methods.at(0); | |
| 413 } | |
| 414 } else { | |
| 415 _exception_message = generate_conflicts_message(&qualified_methods,CHECK); | |
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416 _exception_name = vmSymbols::java_lang_IncompatibleClassChangeError(); |
| 6934 | 417 } |
| 418 | |
| 419 assert((has_target() ^ throws_exception()) == 1, | |
| 420 "One and only one must be true"); | |
| 421 } | |
| 422 | |
| 423 bool contains_signature(Symbol* query) { | |
| 424 for (int i = 0; i < _members.length(); ++i) { | |
| 425 if (query == _members.at(i).first->signature()) { | |
| 426 return true; | |
| 427 } | |
| 428 } | |
| 429 return false; | |
| 430 } | |
| 431 | |
| 432 #ifndef PRODUCT | |
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433 void print_sig_on(outputStream* str, Symbol* signature, int indent) const { |
| 6934 | 434 streamIndentor si(str, indent * 2); |
| 435 | |
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436 str->indent().print_cr("Logical Method %s:", signature->as_C_string()); |
| 6934 | 437 |
| 438 streamIndentor si2(str); | |
| 439 for (int i = 0; i < _members.length(); ++i) { | |
| 440 str->indent(); | |
| 441 print_method(str, _members.at(i).first); | |
| 442 if (_members.at(i).second == DISQUALIFIED) { | |
| 443 str->print(" (disqualified)"); | |
| 444 } | |
| 445 str->print_cr(""); | |
| 446 } | |
| 447 | |
| 448 if (_selected_target != NULL) { | |
| 449 print_selected(str, 1); | |
| 450 } | |
| 451 } | |
| 452 | |
| 453 void print_selected(outputStream* str, int indent) const { | |
| 454 assert(has_target(), "Should be called otherwise"); | |
| 455 streamIndentor si(str, indent * 2); | |
| 456 str->indent().print("Selected method: "); | |
| 457 print_method(str, _selected_target); | |
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458 Klass* method_holder = _selected_target->method_holder(); |
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459 if (!method_holder->is_interface()) { |
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460 tty->print(" : in superclass"); |
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461 } |
| 6934 | 462 str->print_cr(""); |
| 463 } | |
| 464 | |
| 465 void print_exception(outputStream* str, int indent) { | |
| 466 assert(throws_exception(), "Should be called otherwise"); | |
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467 assert(_exception_name != NULL, "exception_name should be set"); |
| 6934 | 468 streamIndentor si(str, indent * 2); |
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469 str->indent().print_cr("%s: %s", _exception_name->as_C_string(), _exception_message->as_C_string()); |
| 6934 | 470 } |
| 471 #endif // ndef PRODUCT | |
| 472 }; | |
| 473 | |
| 474 Symbol* MethodFamily::generate_no_defaults_message(TRAPS) const { | |
| 475 return SymbolTable::new_symbol("No qualifying defaults found", CHECK_NULL); | |
| 476 } | |
| 477 | |
| 478 Symbol* MethodFamily::generate_abstract_method_message(Method* method, TRAPS) const { | |
| 479 Symbol* klass = method->klass_name(); | |
| 480 Symbol* name = method->name(); | |
| 481 Symbol* sig = method->signature(); | |
| 482 stringStream ss; | |
| 483 ss.print("Method "); | |
| 484 ss.write((const char*)klass->bytes(), klass->utf8_length()); | |
| 485 ss.print("."); | |
| 486 ss.write((const char*)name->bytes(), name->utf8_length()); | |
| 487 ss.write((const char*)sig->bytes(), sig->utf8_length()); | |
| 488 ss.print(" is abstract"); | |
| 489 return SymbolTable::new_symbol(ss.base(), (int)ss.size(), CHECK_NULL); | |
| 490 } | |
| 491 | |
| 492 Symbol* MethodFamily::generate_conflicts_message(GrowableArray<Method*>* methods, TRAPS) const { | |
| 493 stringStream ss; | |
| 494 ss.print("Conflicting default methods:"); | |
| 495 for (int i = 0; i < methods->length(); ++i) { | |
| 496 Method* method = methods->at(i); | |
| 497 Symbol* klass = method->klass_name(); | |
| 498 Symbol* name = method->name(); | |
| 499 ss.print(" "); | |
| 500 ss.write((const char*)klass->bytes(), klass->utf8_length()); | |
| 501 ss.print("."); | |
| 502 ss.write((const char*)name->bytes(), name->utf8_length()); | |
| 503 } | |
| 504 return SymbolTable::new_symbol(ss.base(), (int)ss.size(), CHECK_NULL); | |
| 505 } | |
| 506 | |
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507 |
| 6934 | 508 class StateRestorer; |
| 509 | |
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510 // StatefulMethodFamily is a wrapper around a MethodFamily that maintains the |
| 6934 | 511 // qualification state during hierarchy visitation, and applies that state |
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512 // when adding members to the MethodFamily |
| 6934 | 513 class StatefulMethodFamily : public ResourceObj { |
| 514 friend class StateRestorer; | |
| 515 private: | |
| 516 QualifiedState _qualification_state; | |
| 517 | |
| 518 void set_qualification_state(QualifiedState state) { | |
| 519 _qualification_state = state; | |
| 520 } | |
| 521 | |
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522 protected: |
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523 MethodFamily* _method_family; |
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524 |
| 6934 | 525 public: |
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526 StatefulMethodFamily() { |
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527 _method_family = new MethodFamily(); |
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528 _qualification_state = QUALIFIED; |
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529 } |
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530 |
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531 StatefulMethodFamily(MethodFamily* mf) { |
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532 _method_family = mf; |
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533 _qualification_state = QUALIFIED; |
| 6934 | 534 } |
| 535 | |
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536 void set_target_if_empty(Method* m) { _method_family->set_target_if_empty(m); } |
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537 |
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538 MethodFamily* get_method_family() { return _method_family; } |
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539 |
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540 StateRestorer* record_method_and_dq_further(Method* mo); |
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541 }; |
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542 |
| 6934 | 543 class StateRestorer : public PseudoScopeMark { |
| 544 private: | |
| 545 StatefulMethodFamily* _method; | |
| 546 QualifiedState _state_to_restore; | |
| 547 public: | |
| 548 StateRestorer(StatefulMethodFamily* dm, QualifiedState state) | |
| 549 : _method(dm), _state_to_restore(state) {} | |
| 550 ~StateRestorer() { destroy(); } | |
| 551 void restore_state() { _method->set_qualification_state(_state_to_restore); } | |
| 552 virtual void destroy() { restore_state(); } | |
| 553 }; | |
| 554 | |
| 555 StateRestorer* StatefulMethodFamily::record_method_and_dq_further(Method* mo) { | |
| 556 StateRestorer* mark = new StateRestorer(this, _qualification_state); | |
| 557 if (_qualification_state == QUALIFIED) { | |
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558 _method_family->record_qualified_method(mo); |
| 6934 | 559 } else { |
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560 _method_family->record_disqualified_method(mo); |
| 6934 | 561 } |
| 562 // Everything found "above"??? this method in the hierarchy walk is set to | |
| 563 // disqualified | |
| 564 set_qualification_state(DISQUALIFIED); | |
| 565 return mark; | |
| 566 } | |
| 567 | |
| 568 // Represents a location corresponding to a vtable slot for methods that | |
| 569 // neither the class nor any of it's ancestors provide an implementaion. | |
| 570 // Default methods may be present to fill this slot. | |
| 571 class EmptyVtableSlot : public ResourceObj { | |
| 572 private: | |
| 573 Symbol* _name; | |
| 574 Symbol* _signature; | |
| 575 int _size_of_parameters; | |
| 576 MethodFamily* _binding; | |
| 577 | |
| 578 public: | |
| 579 EmptyVtableSlot(Method* method) | |
| 580 : _name(method->name()), _signature(method->signature()), | |
| 581 _size_of_parameters(method->size_of_parameters()), _binding(NULL) {} | |
| 582 | |
| 583 Symbol* name() const { return _name; } | |
| 584 Symbol* signature() const { return _signature; } | |
| 585 int size_of_parameters() const { return _size_of_parameters; } | |
| 586 | |
| 587 void bind_family(MethodFamily* lm) { _binding = lm; } | |
| 588 bool is_bound() { return _binding != NULL; } | |
| 589 MethodFamily* get_binding() { return _binding; } | |
| 590 | |
| 591 #ifndef PRODUCT | |
| 592 void print_on(outputStream* str) const { | |
| 593 print_slot(str, name(), signature()); | |
| 594 } | |
| 595 #endif // ndef PRODUCT | |
| 596 }; | |
| 597 | |
| 598 static GrowableArray<EmptyVtableSlot*>* find_empty_vtable_slots( | |
| 599 InstanceKlass* klass, GrowableArray<Method*>* mirandas, TRAPS) { | |
| 600 | |
| 601 assert(klass != NULL, "Must be valid class"); | |
| 602 | |
| 603 GrowableArray<EmptyVtableSlot*>* slots = new GrowableArray<EmptyVtableSlot*>(); | |
| 604 | |
| 605 // All miranda methods are obvious candidates | |
| 606 for (int i = 0; i < mirandas->length(); ++i) { | |
| 607 EmptyVtableSlot* slot = new EmptyVtableSlot(mirandas->at(i)); | |
| 608 slots->append(slot); | |
| 609 } | |
| 610 | |
| 611 // Also any overpasses in our superclasses, that we haven't implemented. | |
| 612 // (can't use the vtable because it is not guaranteed to be initialized yet) | |
| 613 InstanceKlass* super = klass->java_super(); | |
| 614 while (super != NULL) { | |
| 615 for (int i = 0; i < super->methods()->length(); ++i) { | |
| 616 Method* m = super->methods()->at(i); | |
| 617 if (m->is_overpass()) { | |
| 618 // m is a method that would have been a miranda if not for the | |
| 619 // default method processing that occurred on behalf of our superclass, | |
| 620 // so it's a method we want to re-examine in this new context. That is, | |
| 621 // unless we have a real implementation of it in the current class. | |
| 622 Method* impl = klass->lookup_method(m->name(), m->signature()); | |
| 623 if (impl == NULL || impl->is_overpass()) { | |
| 624 slots->append(new EmptyVtableSlot(m)); | |
| 625 } | |
| 626 } | |
| 627 } | |
| 628 super = super->java_super(); | |
| 629 } | |
| 630 | |
| 631 #ifndef PRODUCT | |
| 632 if (TraceDefaultMethods) { | |
| 633 tty->print_cr("Slots that need filling:"); | |
| 634 streamIndentor si(tty); | |
| 635 for (int i = 0; i < slots->length(); ++i) { | |
| 636 tty->indent(); | |
| 637 slots->at(i)->print_on(tty); | |
| 638 tty->print_cr(""); | |
| 639 } | |
| 640 } | |
| 641 #endif // ndef PRODUCT | |
| 642 return slots; | |
| 643 } | |
| 644 | |
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645 // Iterates over the superinterface type hierarchy looking for all methods |
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646 // with a specific erased signature. |
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647 class FindMethodsByErasedSig : public HierarchyVisitor<FindMethodsByErasedSig> { |
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648 private: |
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649 // Context data |
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650 Symbol* _method_name; |
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651 Symbol* _method_signature; |
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652 StatefulMethodFamily* _family; |
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653 |
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654 public: |
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655 FindMethodsByErasedSig(Symbol* name, Symbol* signature) : |
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656 _method_name(name), _method_signature(signature), |
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657 _family(NULL) {} |
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658 |
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659 void get_discovered_family(MethodFamily** family) { |
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660 if (_family != NULL) { |
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661 *family = _family->get_method_family(); |
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662 } else { |
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663 *family = NULL; |
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664 } |
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665 } |
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666 |
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667 void* new_node_data(InstanceKlass* cls) { return new PseudoScope(); } |
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668 void free_node_data(void* node_data) { |
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669 PseudoScope::cast(node_data)->destroy(); |
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670 } |
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671 |
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672 // Find all methods on this hierarchy that match this |
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673 // method's erased (name, signature) |
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674 bool visit() { |
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675 PseudoScope* scope = PseudoScope::cast(current_data()); |
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676 InstanceKlass* iklass = current_class(); |
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677 |
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678 Method* m = iklass->find_method(_method_name, _method_signature); |
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679 // private interface methods are not candidates for default methods |
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680 // invokespecial to private interface methods doesn't use default method logic |
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681 // future: take access controls into account for superclass methods |
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682 if (m != NULL && (!iklass->is_interface() || m->is_public())) { |
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683 if (_family == NULL) { |
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684 _family = new StatefulMethodFamily(); |
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685 } |
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686 |
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687 if (iklass->is_interface()) { |
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688 StateRestorer* restorer = _family->record_method_and_dq_further(m); |
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689 scope->add_mark(restorer); |
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690 } else { |
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691 // This is the rule that methods in classes "win" (bad word) over |
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692 // methods in interfaces. This works because of single inheritance |
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693 _family->set_target_if_empty(m); |
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694 } |
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695 } |
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696 return true; |
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697 } |
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698 |
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699 }; |
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700 |
| 6934 | 701 |
| 702 | |
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703 static void create_overpasses( |
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704 GrowableArray<EmptyVtableSlot*>* slots, InstanceKlass* klass, TRAPS); |
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705 |
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706 static void generate_erased_defaults( |
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707 InstanceKlass* klass, GrowableArray<EmptyVtableSlot*>* empty_slots, |
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708 EmptyVtableSlot* slot, TRAPS) { |
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709 |
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710 // sets up a set of methods with the same exact erased signature |
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711 FindMethodsByErasedSig visitor(slot->name(), slot->signature()); |
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712 visitor.run(klass); |
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713 |
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714 MethodFamily* family; |
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715 visitor.get_discovered_family(&family); |
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716 if (family != NULL) { |
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717 family->determine_target(klass, CHECK); |
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718 slot->bind_family(family); |
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719 } |
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720 } |
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721 |
| 6934 | 722 static void merge_in_new_methods(InstanceKlass* klass, |
| 723 GrowableArray<Method*>* new_methods, TRAPS); | |
| 724 | |
| 725 // This is the guts of the default methods implementation. This is called just | |
| 726 // after the classfile has been parsed if some ancestor has default methods. | |
| 727 // | |
| 728 // First if finds any name/signature slots that need any implementation (either | |
| 729 // because they are miranda or a superclass's implementation is an overpass | |
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730 // itself). For each slot, iterate over the hierarchy, to see if they contain a |
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731 // signature that matches the slot we are looking at. |
| 6934 | 732 // |
| 733 // For each slot filled, we generate an overpass method that either calls the | |
| 734 // unique default method candidate using invokespecial, or throws an exception | |
| 735 // (in the case of no default method candidates, or more than one valid | |
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736 // candidate). These methods are then added to the class's method list. |
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737 // The JVM does not create bridges nor handle generic signatures here. |
| 6934 | 738 void DefaultMethods::generate_default_methods( |
| 739 InstanceKlass* klass, GrowableArray<Method*>* mirandas, TRAPS) { | |
| 740 | |
| 741 // This resource mark is the bound for all memory allocation that takes | |
| 742 // place during default method processing. After this goes out of scope, | |
| 743 // all (Resource) objects' memory will be reclaimed. Be careful if adding an | |
| 744 // embedded resource mark under here as that memory can't be used outside | |
| 745 // whatever scope it's in. | |
| 746 ResourceMark rm(THREAD); | |
| 747 | |
| 748 // Keep entire hierarchy alive for the duration of the computation | |
| 749 KeepAliveRegistrar keepAlive(THREAD); | |
| 750 KeepAliveVisitor loadKeepAlive(&keepAlive); | |
| 751 loadKeepAlive.run(klass); | |
| 752 | |
| 753 #ifndef PRODUCT | |
| 754 if (TraceDefaultMethods) { | |
| 755 ResourceMark rm; // be careful with these! | |
| 756 tty->print_cr("Class %s requires default method processing", | |
| 757 klass->name()->as_klass_external_name()); | |
| 758 PrintHierarchy printer; | |
| 759 printer.run(klass); | |
| 760 } | |
| 761 #endif // ndef PRODUCT | |
| 762 | |
| 763 GrowableArray<EmptyVtableSlot*>* empty_slots = | |
| 764 find_empty_vtable_slots(klass, mirandas, CHECK); | |
| 765 | |
| 766 for (int i = 0; i < empty_slots->length(); ++i) { | |
| 767 EmptyVtableSlot* slot = empty_slots->at(i); | |
| 768 #ifndef PRODUCT | |
| 769 if (TraceDefaultMethods) { | |
| 770 streamIndentor si(tty, 2); | |
| 771 tty->indent().print("Looking for default methods for slot "); | |
| 772 slot->print_on(tty); | |
| 773 tty->print_cr(""); | |
| 774 } | |
| 775 #endif // ndef PRODUCT | |
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776 |
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777 generate_erased_defaults(klass, empty_slots, slot, CHECK); |
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778 } |
| 6934 | 779 #ifndef PRODUCT |
| 780 if (TraceDefaultMethods) { | |
| 781 tty->print_cr("Creating overpasses..."); | |
| 782 } | |
| 783 #endif // ndef PRODUCT | |
| 784 | |
| 785 create_overpasses(empty_slots, klass, CHECK); | |
| 786 | |
| 787 #ifndef PRODUCT | |
| 788 if (TraceDefaultMethods) { | |
| 789 tty->print_cr("Default method processing complete"); | |
| 790 } | |
| 791 #endif // ndef PRODUCT | |
| 792 } | |
| 793 | |
| 794 | |
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795 |
| 12329 | 796 #ifdef ASSERT |
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797 // Return true is broad type is a covariant return of narrow type |
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798 static bool covariant_return_type(BasicType narrow, BasicType broad) { |
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799 if (narrow == broad) { |
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800 return true; |
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801 } |
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802 if (broad == T_OBJECT) { |
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803 return true; |
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804 } |
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805 return false; |
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806 } |
| 12329 | 807 #endif |
| 6934 | 808 |
| 809 static int assemble_redirect( | |
| 810 BytecodeConstantPool* cp, BytecodeBuffer* buffer, | |
| 811 Symbol* incoming, Method* target, TRAPS) { | |
| 812 | |
| 813 BytecodeAssembler assem(buffer, cp); | |
| 814 | |
| 815 SignatureStream in(incoming, true); | |
| 816 SignatureStream out(target->signature(), true); | |
| 817 u2 parameter_count = 0; | |
| 818 | |
| 819 assem.aload(parameter_count++); // load 'this' | |
| 820 | |
| 821 while (!in.at_return_type()) { | |
| 822 assert(!out.at_return_type(), "Parameter counts do not match"); | |
| 823 BasicType bt = in.type(); | |
| 824 assert(out.type() == bt, "Parameter types are not compatible"); | |
| 825 assem.load(bt, parameter_count); | |
| 826 if (in.is_object() && in.as_symbol(THREAD) != out.as_symbol(THREAD)) { | |
| 827 assem.checkcast(out.as_symbol(THREAD)); | |
| 828 } else if (bt == T_LONG || bt == T_DOUBLE) { | |
| 829 ++parameter_count; // longs and doubles use two slots | |
| 830 } | |
| 831 ++parameter_count; | |
| 832 in.next(); | |
| 833 out.next(); | |
| 834 } | |
| 835 assert(out.at_return_type(), "Parameter counts do not match"); | |
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836 assert(covariant_return_type(out.type(), in.type()), "Return types are not compatible"); |
| 6934 | 837 |
| 838 if (parameter_count == 1 && (in.type() == T_LONG || in.type() == T_DOUBLE)) { | |
| 839 ++parameter_count; // need room for return value | |
| 840 } | |
| 841 if (target->method_holder()->is_interface()) { | |
| 842 assem.invokespecial(target); | |
| 843 } else { | |
| 844 assem.invokevirtual(target); | |
| 845 } | |
| 846 | |
| 847 if (in.is_object() && in.as_symbol(THREAD) != out.as_symbol(THREAD)) { | |
| 848 assem.checkcast(in.as_symbol(THREAD)); | |
| 849 } | |
| 850 assem._return(in.type()); | |
| 851 return parameter_count; | |
| 852 } | |
| 853 | |
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854 static int assemble_method_error( |
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855 BytecodeConstantPool* cp, BytecodeBuffer* buffer, Symbol* errorName, Symbol* message, TRAPS) { |
| 6934 | 856 |
| 857 Symbol* init = vmSymbols::object_initializer_name(); | |
| 858 Symbol* sig = vmSymbols::string_void_signature(); | |
| 859 | |
| 860 BytecodeAssembler assem(buffer, cp); | |
| 861 | |
| 862 assem._new(errorName); | |
| 863 assem.dup(); | |
| 864 assem.load_string(message); | |
| 865 assem.invokespecial(errorName, init, sig); | |
| 866 assem.athrow(); | |
| 867 | |
| 868 return 3; // max stack size: [ exception, exception, string ] | |
| 869 } | |
| 870 | |
| 871 static Method* new_method( | |
| 872 BytecodeConstantPool* cp, BytecodeBuffer* bytecodes, Symbol* name, | |
| 873 Symbol* sig, AccessFlags flags, int max_stack, int params, | |
| 874 ConstMethod::MethodType mt, TRAPS) { | |
| 875 | |
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876 address code_start = 0; |
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877 int code_length = 0; |
| 8031 | 878 InlineTableSizes sizes; |
| 6934 | 879 |
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880 if (bytecodes != NULL && bytecodes->length() > 0) { |
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881 code_start = static_cast<address>(bytecodes->adr_at(0)); |
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882 code_length = bytecodes->length(); |
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883 } |
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884 |
| 6934 | 885 Method* m = Method::allocate(cp->pool_holder()->class_loader_data(), |
| 8031 | 886 code_length, flags, &sizes, |
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887 mt, CHECK_NULL); |
| 6934 | 888 |
| 889 m->set_constants(NULL); // This will get filled in later | |
| 890 m->set_name_index(cp->utf8(name)); | |
| 891 m->set_signature_index(cp->utf8(sig)); | |
| 892 #ifdef CC_INTERP | |
| 893 ResultTypeFinder rtf(sig); | |
| 894 m->set_result_index(rtf.type()); | |
| 895 #endif | |
| 896 m->set_size_of_parameters(params); | |
| 897 m->set_max_stack(max_stack); | |
| 898 m->set_max_locals(params); | |
| 899 m->constMethod()->set_stackmap_data(NULL); | |
| 900 m->set_code(code_start); | |
| 901 m->set_force_inline(true); | |
| 902 | |
| 903 return m; | |
| 904 } | |
| 905 | |
| 906 static void switchover_constant_pool(BytecodeConstantPool* bpool, | |
| 907 InstanceKlass* klass, GrowableArray<Method*>* new_methods, TRAPS) { | |
| 908 | |
| 909 if (new_methods->length() > 0) { | |
| 910 ConstantPool* cp = bpool->create_constant_pool(CHECK); | |
| 911 if (cp != klass->constants()) { | |
| 912 klass->class_loader_data()->add_to_deallocate_list(klass->constants()); | |
| 913 klass->set_constants(cp); | |
| 914 cp->set_pool_holder(klass); | |
| 915 | |
| 916 for (int i = 0; i < new_methods->length(); ++i) { | |
| 917 new_methods->at(i)->set_constants(cp); | |
| 918 } | |
| 919 for (int i = 0; i < klass->methods()->length(); ++i) { | |
| 920 Method* mo = klass->methods()->at(i); | |
| 921 mo->set_constants(cp); | |
| 922 } | |
| 923 } | |
| 924 } | |
| 925 } | |
| 926 | |
| 927 // A "bridge" is a method created by javac to bridge the gap between | |
| 928 // an implementation and a generically-compatible, but different, signature. | |
| 929 // Bridges have actual bytecode implementation in classfiles. | |
| 930 // An "overpass", on the other hand, performs the same function as a bridge | |
| 931 // but does not occur in a classfile; the VM creates overpass itself, | |
| 932 // when it needs a path to get from a call site to an default method, and | |
| 933 // a bridge doesn't exist. | |
| 934 static void create_overpasses( | |
| 935 GrowableArray<EmptyVtableSlot*>* slots, | |
| 936 InstanceKlass* klass, TRAPS) { | |
| 937 | |
| 938 GrowableArray<Method*> overpasses; | |
| 939 BytecodeConstantPool bpool(klass->constants()); | |
| 940 | |
| 941 for (int i = 0; i < slots->length(); ++i) { | |
| 942 EmptyVtableSlot* slot = slots->at(i); | |
| 943 | |
| 944 if (slot->is_bound()) { | |
| 945 MethodFamily* method = slot->get_binding(); | |
| 946 int max_stack = 0; | |
| 947 BytecodeBuffer buffer; | |
| 948 | |
| 949 #ifndef PRODUCT | |
| 950 if (TraceDefaultMethods) { | |
| 951 tty->print("for slot: "); | |
| 952 slot->print_on(tty); | |
| 953 tty->print_cr(""); | |
| 954 if (method->has_target()) { | |
| 955 method->print_selected(tty, 1); | |
| 956 } else { | |
| 957 method->print_exception(tty, 1); | |
| 958 } | |
| 959 } | |
| 960 #endif // ndef PRODUCT | |
| 961 if (method->has_target()) { | |
| 962 Method* selected = method->get_selected_target(); | |
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963 if (selected->method_holder()->is_interface()) { |
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964 max_stack = assemble_redirect( |
| 6934 | 965 &bpool, &buffer, slot->signature(), selected, CHECK); |
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966 } |
| 6934 | 967 } else if (method->throws_exception()) { |
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968 max_stack = assemble_method_error(&bpool, &buffer, method->get_exception_name(), method->get_exception_message(), CHECK); |
| 6934 | 969 } |
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970 if (max_stack != 0) { |
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971 AccessFlags flags = accessFlags_from( |
| 6934 | 972 JVM_ACC_PUBLIC | JVM_ACC_SYNTHETIC | JVM_ACC_BRIDGE); |
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973 Method* m = new_method(&bpool, &buffer, slot->name(), slot->signature(), |
| 6934 | 974 flags, max_stack, slot->size_of_parameters(), |
| 975 ConstMethod::OVERPASS, CHECK); | |
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976 if (m != NULL) { |
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977 overpasses.push(m); |
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978 } |
| 6934 | 979 } |
| 980 } | |
| 981 } | |
| 982 | |
| 983 #ifndef PRODUCT | |
| 984 if (TraceDefaultMethods) { | |
| 985 tty->print_cr("Created %d overpass methods", overpasses.length()); | |
| 986 } | |
| 987 #endif // ndef PRODUCT | |
| 988 | |
| 989 switchover_constant_pool(&bpool, klass, &overpasses, CHECK); | |
| 990 merge_in_new_methods(klass, &overpasses, CHECK); | |
| 991 } | |
| 992 | |
| 993 static void sort_methods(GrowableArray<Method*>* methods) { | |
| 994 // Note that this must sort using the same key as is used for sorting | |
| 995 // methods in InstanceKlass. | |
| 996 bool sorted = true; | |
| 997 for (int i = methods->length() - 1; i > 0; --i) { | |
| 998 for (int j = 0; j < i; ++j) { | |
| 999 Method* m1 = methods->at(j); | |
| 1000 Method* m2 = methods->at(j + 1); | |
| 1001 if ((uintptr_t)m1->name() > (uintptr_t)m2->name()) { | |
| 1002 methods->at_put(j, m2); | |
| 1003 methods->at_put(j + 1, m1); | |
| 1004 sorted = false; | |
| 1005 } | |
| 1006 } | |
| 1007 if (sorted) break; | |
| 1008 sorted = true; | |
| 1009 } | |
| 1010 #ifdef ASSERT | |
| 1011 uintptr_t prev = 0; | |
| 1012 for (int i = 0; i < methods->length(); ++i) { | |
| 1013 Method* mh = methods->at(i); | |
| 1014 uintptr_t nv = (uintptr_t)mh->name(); | |
| 1015 assert(nv >= prev, "Incorrect overpass method ordering"); | |
| 1016 prev = nv; | |
| 1017 } | |
| 1018 #endif | |
| 1019 } | |
| 1020 | |
| 1021 static void merge_in_new_methods(InstanceKlass* klass, | |
| 1022 GrowableArray<Method*>* new_methods, TRAPS) { | |
| 1023 | |
| 1024 enum { ANNOTATIONS, PARAMETERS, DEFAULTS, NUM_ARRAYS }; | |
| 1025 | |
| 1026 Array<Method*>* original_methods = klass->methods(); | |
| 1027 Array<int>* original_ordering = klass->method_ordering(); | |
| 1028 Array<int>* merged_ordering = Universe::the_empty_int_array(); | |
| 1029 | |
| 1030 int new_size = klass->methods()->length() + new_methods->length(); | |
| 1031 | |
| 1032 Array<Method*>* merged_methods = MetadataFactory::new_array<Method*>( | |
| 1033 klass->class_loader_data(), new_size, NULL, CHECK); | |
| 8031 | 1034 |
| 6934 | 1035 if (original_ordering != NULL && original_ordering->length() > 0) { |
| 1036 merged_ordering = MetadataFactory::new_array<int>( | |
| 1037 klass->class_loader_data(), new_size, CHECK); | |
| 1038 } | |
| 1039 int method_order_index = klass->methods()->length(); | |
| 1040 | |
| 1041 sort_methods(new_methods); | |
| 1042 | |
| 1043 // Perform grand merge of existing methods and new methods | |
| 1044 int orig_idx = 0; | |
| 1045 int new_idx = 0; | |
| 1046 | |
| 1047 for (int i = 0; i < new_size; ++i) { | |
| 1048 Method* orig_method = NULL; | |
| 1049 Method* new_method = NULL; | |
| 1050 if (orig_idx < original_methods->length()) { | |
| 1051 orig_method = original_methods->at(orig_idx); | |
| 1052 } | |
| 1053 if (new_idx < new_methods->length()) { | |
| 1054 new_method = new_methods->at(new_idx); | |
| 1055 } | |
| 1056 | |
| 1057 if (orig_method != NULL && | |
| 1058 (new_method == NULL || orig_method->name() < new_method->name())) { | |
| 1059 merged_methods->at_put(i, orig_method); | |
| 1060 original_methods->at_put(orig_idx, NULL); | |
| 1061 if (merged_ordering->length() > 0) { | |
| 1062 merged_ordering->at_put(i, original_ordering->at(orig_idx)); | |
| 1063 } | |
| 1064 ++orig_idx; | |
| 1065 } else { | |
| 1066 merged_methods->at_put(i, new_method); | |
| 1067 if (merged_ordering->length() > 0) { | |
| 1068 merged_ordering->at_put(i, method_order_index++); | |
| 1069 } | |
| 1070 ++new_idx; | |
| 1071 } | |
| 1072 // update idnum for new location | |
| 1073 merged_methods->at(i)->set_method_idnum(i); | |
| 1074 } | |
| 1075 | |
| 1076 // Verify correct order | |
| 1077 #ifdef ASSERT | |
| 1078 uintptr_t prev = 0; | |
| 1079 for (int i = 0; i < merged_methods->length(); ++i) { | |
| 1080 Method* mo = merged_methods->at(i); | |
| 1081 uintptr_t nv = (uintptr_t)mo->name(); | |
| 1082 assert(nv >= prev, "Incorrect method ordering"); | |
| 1083 prev = nv; | |
| 1084 } | |
| 1085 #endif | |
| 1086 | |
| 1087 // Replace klass methods with new merged lists | |
| 1088 klass->set_methods(merged_methods); | |
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1089 klass->set_initial_method_idnum(new_size); |
| 6934 | 1090 |
| 1091 ClassLoaderData* cld = klass->class_loader_data(); | |
| 1092 MetadataFactory::free_array(cld, original_methods); | |
| 1093 if (original_ordering->length() > 0) { | |
| 1094 klass->set_method_ordering(merged_ordering); | |
| 1095 MetadataFactory::free_array(cld, original_ordering); | |
| 1096 } | |
| 1097 } |