1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
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 "jvm.h"
27 #include "classfile/defaultMethods.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/resolutionErrors.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "gc/shared/collectedHeap.inline.hpp"
35 #include "interpreter/bytecode.hpp"
36 #include "interpreter/interpreterRuntime.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.hpp"
42 #include "oops/cpCache.inline.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/method.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "prims/methodHandles.hpp"
49 #include "prims/nativeLookup.hpp"
50 #include "runtime/compilationPolicy.hpp"
51 #include "runtime/fieldDescriptor.hpp"
52 #include "runtime/frame.inline.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/reflection.hpp"
55 #include "runtime/safepointVerifiers.hpp"
56 #include "runtime/signature.hpp"
57 #include "runtime/thread.inline.hpp"
58 #include "runtime/vmThread.hpp"
59
60 //------------------------------------------------------------------------------------------------------------------------
61 // Implementation of CallInfo
62
63
64 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
65 int vtable_index = Method::nonvirtual_vtable_index;
66 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
67 }
68
69
70 void CallInfo::set_interface(Klass* resolved_klass,
71 Klass* selected_klass,
72 const methodHandle& resolved_method,
73 const methodHandle& selected_method,
74 int itable_index, TRAPS) {
75 // This is only called for interface methods. If the resolved_method
76 // comes from java/lang/Object, it can be the subject of a virtual call, so
77 // we should pick the vtable index from the resolved method.
78 // In that case, the caller must call set_virtual instead of set_interface.
79 assert(resolved_method->method_holder()->is_interface(), "");
80 assert(itable_index == resolved_method()->itable_index(), "");
81 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
82 }
83
84 void CallInfo::set_virtual(Klass* resolved_klass,
85 Klass* selected_klass,
86 const methodHandle& resolved_method,
87 const methodHandle& selected_method,
88 int vtable_index, TRAPS) {
89 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
90 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
91 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
92 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
93 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
94 }
95
96 void CallInfo::set_handle(const methodHandle& resolved_method,
97 Handle resolved_appendix,
98 Handle resolved_method_type, TRAPS) {
99 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
100 }
101
102 void CallInfo::set_handle(Klass* resolved_klass,
103 const methodHandle& resolved_method,
104 Handle resolved_appendix,
105 Handle resolved_method_type, TRAPS) {
106 if (resolved_method.is_null()) {
107 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
108 }
109 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
110 resolved_method->is_compiled_lambda_form(),
111 "linkMethod must return one of these");
112 int vtable_index = Method::nonvirtual_vtable_index;
113 assert(!resolved_method->has_vtable_index(), "");
114 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
115 _resolved_appendix = resolved_appendix;
116 _resolved_method_type = resolved_method_type;
117 }
118
119 void CallInfo::set_common(Klass* resolved_klass,
120 Klass* selected_klass,
121 const methodHandle& resolved_method,
122 const methodHandle& selected_method,
123 CallKind kind,
124 int index,
125 TRAPS) {
126 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
127 _resolved_klass = resolved_klass;
128 _selected_klass = selected_klass;
129 _resolved_method = resolved_method;
130 _selected_method = selected_method;
131 _call_kind = kind;
132 _call_index = index;
133 _resolved_appendix = Handle();
134 DEBUG_ONLY(verify()); // verify before making side effects
135
136 CompilationPolicy::compile_if_required(selected_method, THREAD);
137 }
138
139 // utility query for unreflecting a method
140 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
141 Klass* resolved_method_holder = resolved_method->method_holder();
142 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
143 resolved_klass = resolved_method_holder;
144 }
145 _resolved_klass = resolved_klass;
146 _selected_klass = resolved_klass;
147 _resolved_method = resolved_method;
148 _selected_method = resolved_method;
149 // classify:
150 CallKind kind = CallInfo::unknown_kind;
151 int index = resolved_method->vtable_index();
152 if (resolved_method->can_be_statically_bound()) {
153 kind = CallInfo::direct_call;
154 } else if (!resolved_method_holder->is_interface()) {
155 // Could be an Object method inherited into an interface, but still a vtable call.
156 kind = CallInfo::vtable_call;
157 } else if (!resolved_klass->is_interface()) {
158 // A default or miranda method. Compute the vtable index.
159 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
160 resolved_method);
161 assert(index >= 0 , "we should have valid vtable index at this point");
162
163 kind = CallInfo::vtable_call;
164 } else if (resolved_method->has_vtable_index()) {
165 // Can occur if an interface redeclares a method of Object.
166
167 #ifdef ASSERT
168 // Ensure that this is really the case.
169 Klass* object_klass = SystemDictionary::Object_klass();
170 Method * object_resolved_method = object_klass->vtable().method_at(index);
171 assert(object_resolved_method->name() == resolved_method->name(),
172 "Object and interface method names should match at vtable index %d, %s != %s",
173 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
174 assert(object_resolved_method->signature() == resolved_method->signature(),
175 "Object and interface method signatures should match at vtable index %d, %s != %s",
176 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
177 #endif // ASSERT
178
179 kind = CallInfo::vtable_call;
180 } else {
181 // A regular interface call.
182 kind = CallInfo::itable_call;
183 index = resolved_method->itable_index();
184 }
185 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
186 _call_kind = kind;
187 _call_index = index;
188 _resolved_appendix = Handle();
189 // Find or create a ResolvedMethod instance for this Method*
190 set_resolved_method_name(CHECK);
191
192 DEBUG_ONLY(verify());
193 }
194
195 void CallInfo::set_resolved_method_name(TRAPS) {
196 Method* m = _resolved_method();
197 assert(m != NULL, "Should already have a Method*");
198 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
199 _resolved_method_name = Handle(THREAD, rmethod_name);
200 }
201
202 #ifdef ASSERT
203 void CallInfo::verify() {
204 switch (call_kind()) { // the meaning and allowed value of index depends on kind
205 case CallInfo::direct_call:
206 if (_call_index == Method::nonvirtual_vtable_index) break;
207 // else fall through to check vtable index:
208 case CallInfo::vtable_call:
209 assert(resolved_klass()->verify_vtable_index(_call_index), "");
210 break;
211 case CallInfo::itable_call:
212 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
213 break;
214 case CallInfo::unknown_kind:
215 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
216 break;
217 default:
218 fatal("Unexpected call kind %d", call_kind());
219 }
220 }
221 #endif // ASSERT
222
223 #ifndef PRODUCT
224 void CallInfo::print() {
225 ResourceMark rm;
226 const char* kindstr;
227 switch (_call_kind) {
228 case direct_call: kindstr = "direct"; break;
229 case vtable_call: kindstr = "vtable"; break;
230 case itable_call: kindstr = "itable"; break;
231 default : kindstr = "unknown"; break;
232 }
233 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
234 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
235 }
236 #endif
237
238 //------------------------------------------------------------------------------------------------------------------------
239 // Implementation of LinkInfo
240
241 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
242 // resolve klass
243 _resolved_klass = pool->klass_ref_at(index, CHECK);
244
245 // Get name, signature, and static klass
246 _name = pool->name_ref_at(index);
247 _signature = pool->signature_ref_at(index);
248 _tag = pool->tag_ref_at(index);
249 _current_klass = pool->pool_holder();
250 _current_method = current_method;
251
252 // Coming from the constant pool always checks access
253 _check_access = true;
254 }
255
256 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
257 // resolve klass
258 _resolved_klass = pool->klass_ref_at(index, CHECK);
259
260 // Get name, signature, and static klass
261 _name = pool->name_ref_at(index);
262 _signature = pool->signature_ref_at(index);
263 _tag = pool->tag_ref_at(index);
264 _current_klass = pool->pool_holder();
265 _current_method = methodHandle();
266
267 // Coming from the constant pool always checks access
268 _check_access = true;
269 }
270
271 char* LinkInfo::method_string() const {
272 return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature);
273 }
274
275 #ifndef PRODUCT
276 void LinkInfo::print() {
277 ResourceMark rm;
278 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
279 _resolved_klass->name()->as_C_string(),
280 _name->as_C_string(),
281 _signature->as_C_string(),
282 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
283 _check_access ? "true" : "false");
284 }
285 #endif // PRODUCT
286 //------------------------------------------------------------------------------------------------------------------------
287 // Klass resolution
288
289 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
290 bool fold_type_to_class, TRAPS) {
291 Klass* base_klass = sel_klass;
292 if (fold_type_to_class) {
293 if (sel_klass->is_objArray_klass()) {
294 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
295 }
296 // The element type could be a typeArray - we only need the access
297 // check if it is a reference to another class.
298 if (!base_klass->is_instance_klass()) {
299 return; // no relevant check to do
300 }
301 }
302 Reflection::VerifyClassAccessResults vca_result =
303 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
304 if (vca_result != Reflection::ACCESS_OK) {
305 ResourceMark rm(THREAD);
306 char* msg = Reflection::verify_class_access_msg(ref_klass,
307 InstanceKlass::cast(base_klass),
308 vca_result);
309 bool same_module = (base_klass->module() == ref_klass->module());
310 if (msg == NULL) {
311 Exceptions::fthrow(
312 THREAD_AND_LOCATION,
313 vmSymbols::java_lang_IllegalAccessError(),
314 "failed to access class %s from class %s (%s%s%s)",
315 base_klass->external_name(),
316 ref_klass->external_name(),
317 (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(),
318 (same_module) ? "" : "; ",
319 (same_module) ? "" : ref_klass->class_in_module_of_loader());
320 } else {
321 // Use module specific message returned by verify_class_access_msg().
322 Exceptions::fthrow(
323 THREAD_AND_LOCATION,
324 vmSymbols::java_lang_IllegalAccessError(),
325 "%s", msg);
326 }
327 }
328 }
329
330 //------------------------------------------------------------------------------------------------------------------------
331 // Method resolution
332 //
333 // According to JVM spec. $5.4.3c & $5.4.3d
334
335 // Look up method in klasses, including static methods
336 // Then look up local default methods
337 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
338 bool checkpolymorphism,
339 bool in_imethod_resolve) {
340 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
341
342 Klass* klass = link_info.resolved_klass();
343 Symbol* name = link_info.name();
344 Symbol* signature = link_info.signature();
345
346 // Ignore overpasses so statics can be found during resolution
347 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
348
349 if (klass->is_array_klass()) {
350 // Only consider klass and super klass for arrays
351 return result;
352 }
353
354 InstanceKlass* ik = InstanceKlass::cast(klass);
355
356 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
357 // ignore static and non-public methods of java.lang.Object,
358 // like clone, finalize, registerNatives.
359 if (in_imethod_resolve &&
360 result != NULL &&
361 ik->is_interface() &&
362 (result->is_static() || !result->is_public()) &&
363 result->method_holder() == SystemDictionary::Object_klass()) {
364 result = NULL;
365 }
366
367 // Before considering default methods, check for an overpass in the
368 // current class if a method has not been found.
369 if (result == NULL) {
370 result = ik->find_method(name, signature);
371 }
372
373 if (result == NULL) {
374 Array<Method*>* default_methods = ik->default_methods();
375 if (default_methods != NULL) {
376 result = InstanceKlass::find_method(default_methods, name, signature);
377 }
378 }
379
380 if (checkpolymorphism && result != NULL) {
381 vmIntrinsics::ID iid = result->intrinsic_id();
382 if (MethodHandles::is_signature_polymorphic(iid)) {
383 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
384 return NULL;
385 }
386 }
387 return result;
388 }
389
390 // returns first instance method
391 // Looks up method in classes, then looks up local default methods
392 methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
393 Symbol* name,
394 Symbol* signature,
395 Klass::PrivateLookupMode private_mode, TRAPS) {
396 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
397
398 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
399 Klass* super_klass = result->method_holder()->super();
400 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
401 }
402
403 if (klass->is_array_klass()) {
404 // Only consider klass and super klass for arrays
405 return methodHandle(THREAD, result);
406 }
407
408 if (result == NULL) {
409 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
410 if (default_methods != NULL) {
411 result = InstanceKlass::find_method(default_methods, name, signature);
412 assert(result == NULL || !result->is_static(), "static defaults not allowed");
413 }
414 }
415 return methodHandle(THREAD, result);
416 }
417
418 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
419 const methodHandle& resolved_method) {
420
421 int vtable_index = Method::invalid_vtable_index;
422 Symbol* name = resolved_method->name();
423 Symbol* signature = resolved_method->signature();
424 InstanceKlass* ik = InstanceKlass::cast(klass);
425
426 // First check in default method array
427 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
428 int index = InstanceKlass::find_method_index(ik->default_methods(),
429 name, signature, Klass::find_overpass,
430 Klass::find_static, Klass::find_private);
431 if (index >= 0 ) {
432 vtable_index = ik->default_vtable_indices()->at(index);
433 }
434 }
435 if (vtable_index == Method::invalid_vtable_index) {
436 // get vtable_index for miranda methods
437 klassVtable vt = ik->vtable();
438 vtable_index = vt.index_of_miranda(name, signature);
439 }
440 return vtable_index;
441 }
442
443 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
444 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
445
446 // Specify 'true' in order to skip default methods when searching the
447 // interfaces. Function lookup_method_in_klasses() already looked for
448 // the method in the default methods table.
449 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
450 }
451
452 methodHandle LinkResolver::lookup_polymorphic_method(
453 const LinkInfo& link_info,
454 Handle *appendix_result_or_null,
455 Handle *method_type_result,
456 TRAPS) {
457 Klass* klass = link_info.resolved_klass();
458 Symbol* name = link_info.name();
459 Symbol* full_signature = link_info.signature();
460
461 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
462 if (TraceMethodHandles) {
463 ResourceMark rm(THREAD);
464 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
465 vmIntrinsics::name_at(iid), klass->external_name(),
466 name->as_C_string(), full_signature->as_C_string());
467 }
468 if ((klass == SystemDictionary::MethodHandle_klass() ||
469 klass == SystemDictionary::VarHandle_klass()) &&
470 iid != vmIntrinsics::_none) {
471 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
472 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
473 // Do not erase last argument type (MemberName) if it is a static linkTo method.
474 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
475 TempNewSymbol basic_signature =
476 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
477 if (TraceMethodHandles) {
478 ResourceMark rm(THREAD);
479 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
480 name->as_C_string(),
481 full_signature->as_C_string(),
482 basic_signature->as_C_string());
483 }
484 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
485 basic_signature,
486 CHECK_NULL);
487 if (result.not_null()) {
488 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
489 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
490 assert(basic_signature == result->signature(), "predict the result signature");
491 if (TraceMethodHandles) {
492 ttyLocker ttyl;
493 tty->print("lookup_polymorphic_method => intrinsic ");
494 result->print_on(tty);
495 }
496 }
497 return result;
498 } else if (iid == vmIntrinsics::_invokeGeneric
499 && THREAD->can_call_java()
500 && appendix_result_or_null != NULL) {
501 // This is a method with type-checking semantics.
502 // We will ask Java code to spin an adapter method for it.
503 if (!MethodHandles::enabled()) {
504 // Make sure the Java part of the runtime has been booted up.
505 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
506 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
507 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
508 Handle(),
509 Handle(),
510 true,
511 CHECK_NULL);
512 }
513 }
514
515 Handle appendix;
516 Handle method_type;
517 methodHandle result = SystemDictionary::find_method_handle_invoker(
518 klass,
519 name,
520 full_signature,
521 link_info.current_klass(),
522 &appendix,
523 &method_type,
524 CHECK_NULL);
525 if (TraceMethodHandles) {
526 ttyLocker ttyl;
527 tty->print("lookup_polymorphic_method => (via Java) ");
528 result->print_on(tty);
529 tty->print(" lookup_polymorphic_method => appendix = ");
530 if (appendix.is_null()) tty->print_cr("(none)");
531 else appendix->print_on(tty);
532 }
533 if (result.not_null()) {
534 #ifdef ASSERT
535 ResourceMark rm(THREAD);
536
537 TempNewSymbol basic_signature =
538 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
539 int actual_size_of_params = result->size_of_parameters();
540 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
541 // +1 for MethodHandle.this, +1 for trailing MethodType
542 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
543 if (appendix.not_null()) expected_size_of_params += 1;
544 if (actual_size_of_params != expected_size_of_params) {
545 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
546 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
547 result->print();
548 }
549 assert(actual_size_of_params == expected_size_of_params,
550 "%d != %d", actual_size_of_params, expected_size_of_params);
551 #endif //ASSERT
552
553 assert(appendix_result_or_null != NULL, "");
554 (*appendix_result_or_null) = appendix;
555 (*method_type_result) = method_type;
556 }
557 return result;
558 }
559 }
560 return NULL;
561 }
562
563 void LinkResolver::check_method_accessability(Klass* ref_klass,
564 Klass* resolved_klass,
565 Klass* sel_klass,
566 const methodHandle& sel_method,
567 TRAPS) {
568
569 AccessFlags flags = sel_method->access_flags();
570
571 // Special case: arrays always override "clone". JVMS 2.15.
572 // If the resolved klass is an array class, and the declaring class
573 // is java.lang.Object and the method is "clone", set the flags
574 // to public.
575 //
576 // We'll check for the method name first, as that's most likely
577 // to be false (so we'll short-circuit out of these tests).
578 if (sel_method->name() == vmSymbols::clone_name() &&
579 sel_klass == SystemDictionary::Object_klass() &&
580 resolved_klass->is_array_klass()) {
581 // We need to change "protected" to "public".
582 assert(flags.is_protected(), "clone not protected?");
583 jint new_flags = flags.as_int();
584 new_flags = new_flags & (~JVM_ACC_PROTECTED);
585 new_flags = new_flags | JVM_ACC_PUBLIC;
586 flags.set_flags(new_flags);
587 }
588 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
589
590 bool can_access = Reflection::verify_member_access(ref_klass,
591 resolved_klass,
592 sel_klass,
593 flags,
594 true, false, CHECK);
595 // Any existing exceptions that may have been thrown, for example LinkageErrors
596 // from nest-host resolution, have been allowed to propagate.
597 if (!can_access) {
598 ResourceMark rm(THREAD);
599 bool same_module = (sel_klass->module() == ref_klass->module());
600 Exceptions::fthrow(
601 THREAD_AND_LOCATION,
602 vmSymbols::java_lang_IllegalAccessError(),
603 "class %s tried to access %s%s%smethod %s.%s%s (%s%s%s)",
604 ref_klass->external_name(),
605 sel_method->is_abstract() ? "abstract " : "",
606 sel_method->is_protected() ? "protected " : "",
607 sel_method->is_private() ? "private " : "",
608 sel_klass->external_name(),
609 sel_method->name()->as_C_string(),
610 sel_method->signature()->as_C_string(),
611 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
612 (same_module) ? "" : "; ",
613 (same_module) ? "" : sel_klass->class_in_module_of_loader()
614 );
615 return;
616 }
617 }
618
619 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
620 const constantPoolHandle& pool, int index, TRAPS) {
621 // This method is used only
622 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
623 // and
624 // (2) in Bytecode_invoke::static_target
625 // It appears to fail when applied to an invokeinterface call site.
626 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
627 // resolve klass
628 if (code == Bytecodes::_invokedynamic) {
629 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
630 Symbol* method_name = vmSymbols::invoke_name();
631 Symbol* method_signature = pool->signature_ref_at(index);
632 Klass* current_klass = pool->pool_holder();
633 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
634 return resolve_method(link_info, code, THREAD);
635 }
636
637 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
638 Klass* resolved_klass = link_info.resolved_klass();
639
640 if (pool->has_preresolution()
641 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
642 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
643 Method* result = ConstantPool::method_at_if_loaded(pool, index);
644 if (result != NULL) {
645 return methodHandle(THREAD, result);
646 }
647 }
648
649 if (code == Bytecodes::_invokeinterface) {
650 return resolve_interface_method(link_info, code, THREAD);
651 } else if (code == Bytecodes::_invokevirtual) {
652 return resolve_method(link_info, code, THREAD);
653 } else if (!resolved_klass->is_interface()) {
654 return resolve_method(link_info, code, THREAD);
655 } else {
656 return resolve_interface_method(link_info, code, THREAD);
657 }
658 }
659
660 // Check and print a loader constraint violation message for method or interface method
661 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
662 const methodHandle& resolved_method,
663 const char* method_type, TRAPS) {
664 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
665 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
666
667 ResourceMark rm(THREAD);
668 Symbol* failed_type_symbol =
669 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
670 resolved_loader, true, CHECK);
671 if (failed_type_symbol != NULL) {
672 Klass* current_class = link_info.current_klass();
673 ClassLoaderData* current_loader_data = current_class->class_loader_data();
674 assert(current_loader_data != NULL, "current class has no class loader data");
675 Klass* resolved_method_class = resolved_method->method_holder();
676 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
677 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
678
679 stringStream ss;
680 ss.print("loader constraint violation: when resolving %s"
681 " \"%s\" the class loader %s of the current class, %s,"
682 " and the class loader %s for the method's defining class, %s, have"
683 " different Class objects for the type %s used in the signature (%s; %s)",
684 method_type,
685 link_info.method_string(),
686 current_loader_data->loader_name_and_id(),
687 current_class->name()->as_C_string(),
688 target_loader_data->loader_name_and_id(),
689 resolved_method_class->name()->as_C_string(),
690 failed_type_symbol->as_C_string(),
691 current_class->class_in_module_of_loader(false, true),
692 resolved_method_class->class_in_module_of_loader(false, true));
693 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
694 }
695 }
696
697 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
698 Klass* current_klass,
699 Klass* sel_klass, TRAPS) {
700 Handle ref_loader(THREAD, current_klass->class_loader());
701 Handle sel_loader(THREAD, sel_klass->class_loader());
702
703 ResourceMark rm(THREAD); // needed for check_signature_loaders
704 Symbol* failed_type_symbol =
705 SystemDictionary::check_signature_loaders(sig,
706 ref_loader, sel_loader,
707 false,
708 CHECK);
709 if (failed_type_symbol != NULL) {
710 stringStream ss;
711 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
712
713 ss.print("loader constraint violation: when resolving field"
714 " \"%s\" of type %s, the class loader %s of the current class, "
715 "%s, and the class loader %s for the field's defining "
716 "type, %s, have different Class objects for type %s (%s; %s)",
717 field->as_C_string(),
718 failed_type_name,
719 current_klass->class_loader_data()->loader_name_and_id(),
720 current_klass->external_name(),
721 sel_klass->class_loader_data()->loader_name_and_id(),
722 sel_klass->external_name(),
723 failed_type_name,
724 current_klass->class_in_module_of_loader(false, true),
725 sel_klass->class_in_module_of_loader(false, true));
726 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
727 }
728 }
729
730 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
731 Bytecodes::Code code, TRAPS) {
732
733 Handle nested_exception;
734 Klass* resolved_klass = link_info.resolved_klass();
735
736 // 1. For invokevirtual, cannot call an interface method
737 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
738 ResourceMark rm(THREAD);
739 char buf[200];
740 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
741 resolved_klass->external_name());
742 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
743 }
744
745 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
746 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
747 ResourceMark rm(THREAD);
748 char buf[200];
749 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
750 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
751 }
752
753 // 3. lookup method in resolved klass and its super klasses
754 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
755
756 // 4. lookup method in all the interfaces implemented by the resolved klass
757 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
758 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
759
760 if (resolved_method.is_null()) {
761 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
762 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
763 if (HAS_PENDING_EXCEPTION) {
764 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
765 CLEAR_PENDING_EXCEPTION;
766 }
767 }
768 }
769
770 // 5. method lookup failed
771 if (resolved_method.is_null()) {
772 ResourceMark rm(THREAD);
773 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
774 Method::name_and_sig_as_C_string(resolved_klass,
775 link_info.name(),
776 link_info.signature()),
777 nested_exception, NULL);
778 }
779
780 // 6. access checks, access checking may be turned off when calling from within the VM.
781 Klass* current_klass = link_info.current_klass();
782 if (link_info.check_access()) {
783 assert(current_klass != NULL , "current_klass should not be null");
784
785 // check if method can be accessed by the referring class
786 check_method_accessability(current_klass,
787 resolved_klass,
788 resolved_method->method_holder(),
789 resolved_method,
790 CHECK_NULL);
791
792 // check loader constraints
793 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
794 }
795
796 // For private method invocation we should only find the method in the resolved class.
797 // If that is not the case then we have a found a supertype method that we have nestmate
798 // access to.
799 if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) {
800 ResourceMark rm(THREAD);
801 DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);)
802 assert(is_nestmate, "was only expecting nestmates to get here!");
803 Exceptions::fthrow(
804 THREAD_AND_LOCATION,
805 vmSymbols::java_lang_NoSuchMethodError(),
806 "%s: method %s%s not found",
807 resolved_klass->external_name(),
808 resolved_method->name()->as_C_string(),
809 resolved_method->signature()->as_C_string()
810 );
811 return NULL;
812 }
813
814 return resolved_method;
815 }
816
817 static void trace_method_resolution(const char* prefix,
818 Klass* klass,
819 Klass* resolved_klass,
820 const methodHandle& method,
821 bool logitables,
822 int index = -1) {
823 #ifndef PRODUCT
824 ResourceMark rm;
825 Log(itables) logi;
826 LogStream lsi(logi.trace());
827 Log(vtables) logv;
828 LogStream lsv(logv.trace());
829 outputStream* st;
830 if (logitables) {
831 st = &lsi;
832 } else {
833 st = &lsv;
834 }
835 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
836 prefix,
837 (klass == NULL ? "<NULL>" : klass->internal_name()),
838 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
839 Method::name_and_sig_as_C_string(resolved_klass,
840 method->name(),
841 method->signature()),
842 method->method_holder()->internal_name());
843 method->print_linkage_flags(st);
844 if (index != -1) {
845 st->print("vtable_index:%d", index);
846 }
847 st->cr();
848 #endif // PRODUCT
849 }
850
851 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
852 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
853
854 Klass* resolved_klass = link_info.resolved_klass();
855
856 // check if klass is interface
857 if (!resolved_klass->is_interface()) {
858 ResourceMark rm(THREAD);
859 char buf[200];
860 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
861 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
862 }
863
864 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
865 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
866 ResourceMark rm(THREAD);
867 char buf[200];
868 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
869 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
870 }
871
872 // lookup method in this interface or its super, java.lang.Object
873 // JDK8: also look for static methods
874 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
875
876 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
877 // lookup method in all the super-interfaces
878 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
879 }
880
881 if (resolved_method.is_null()) {
882 // no method found
883 ResourceMark rm(THREAD);
884 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
885 Method::name_and_sig_as_C_string(resolved_klass,
886 link_info.name(),
887 link_info.signature()));
888 }
889
890 if (link_info.check_access()) {
891 // JDK8 adds non-public interface methods, and accessability check requirement
892 Klass* current_klass = link_info.current_klass();
893
894 assert(current_klass != NULL , "current_klass should not be null");
895
896 // check if method can be accessed by the referring class
897 check_method_accessability(current_klass,
898 resolved_klass,
899 resolved_method->method_holder(),
900 resolved_method,
901 CHECK_NULL);
902
903 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
904 }
905
906 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
907 ResourceMark rm(THREAD);
908 char buf[200];
909 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
910 Method::name_and_sig_as_C_string(resolved_klass,
911 resolved_method->name(), resolved_method->signature()));
912 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
913 }
914
915 if (log_develop_is_enabled(Trace, itables)) {
916 char buf[200];
917 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
918 Bytecodes::name(code));
919 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
920 resolved_method, true);
921 }
922
923 return resolved_method;
924 }
925
926 //------------------------------------------------------------------------------------------------------------------------
927 // Field resolution
928
929 void LinkResolver::check_field_accessability(Klass* ref_klass,
930 Klass* resolved_klass,
931 Klass* sel_klass,
932 const fieldDescriptor& fd,
933 TRAPS) {
934 bool can_access = Reflection::verify_member_access(ref_klass,
935 resolved_klass,
936 sel_klass,
937 fd.access_flags(),
938 true, false, CHECK);
939 // Any existing exceptions that may have been thrown, for example LinkageErrors
940 // from nest-host resolution, have been allowed to propagate.
941 if (!can_access) {
942 bool same_module = (sel_klass->module() == ref_klass->module());
943 ResourceMark rm(THREAD);
944 Exceptions::fthrow(
945 THREAD_AND_LOCATION,
946 vmSymbols::java_lang_IllegalAccessError(),
947 "class %s tried to access %s%sfield %s.%s (%s%s%s)",
948 ref_klass->external_name(),
949 fd.is_protected() ? "protected " : "",
950 fd.is_private() ? "private " : "",
951 sel_klass->external_name(),
952 fd.name()->as_C_string(),
953 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
954 (same_module) ? "" : "; ",
955 (same_module) ? "" : sel_klass->class_in_module_of_loader()
956 );
957 return;
958 }
959 }
960
961 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
962 LinkInfo link_info(pool, index, method, CHECK);
963 resolve_field(fd, link_info, byte, true, CHECK);
964 }
965
966 void LinkResolver::resolve_field(fieldDescriptor& fd,
967 const LinkInfo& link_info,
968 Bytecodes::Code byte, bool initialize_class,
969 TRAPS) {
970 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
971 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
972 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
973 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
974
975 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
976 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
977 // Check if there's a resolved klass containing the field
978 Klass* resolved_klass = link_info.resolved_klass();
979 Symbol* field = link_info.name();
980 Symbol* sig = link_info.signature();
981
982 if (resolved_klass == NULL) {
983 ResourceMark rm(THREAD);
984 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
985 }
986
987 // Resolve instance field
988 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
989 // check if field exists; i.e., if a klass containing the field def has been selected
990 if (sel_klass == NULL) {
991 ResourceMark rm(THREAD);
992 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
993 }
994
995 if (!link_info.check_access())
996 // Access checking may be turned off when calling from within the VM.
997 return;
998
999 // check access
1000 Klass* current_klass = link_info.current_klass();
1001 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
1002
1003 // check for errors
1004 if (is_static != fd.is_static()) {
1005 ResourceMark rm(THREAD);
1006 char msg[200];
1007 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
1008 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
1009 }
1010
1011 // A final field can be modified only
1012 // (1) by methods declared in the class declaring the field and
1013 // (2) by the <clinit> method (in case of a static field)
1014 // or by the <init> method (in case of an instance field).
1015 if (is_put && fd.access_flags().is_final()) {
1016 ResourceMark rm(THREAD);
1017 stringStream ss;
1018
1019 if (sel_klass != current_klass) {
1020 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1021 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1022 current_klass->external_name());
1023 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1024 }
1025
1026 if (fd.constants()->pool_holder()->major_version() >= 53) {
1027 methodHandle m = link_info.current_method();
1028 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
1029 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1030 fd.is_static() &&
1031 !m()->is_static_initializer());
1032 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1033 !fd.is_static() &&
1034 !m->is_object_initializer());
1035
1036 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1037 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1038 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1039 m()->name()->as_C_string(),
1040 is_static ? "<clinit>" : "<init>");
1041 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1042 }
1043 }
1044 }
1045
1046 // initialize resolved_klass if necessary
1047 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1048 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1049 //
1050 // note 2: we don't want to force initialization if we are just checking
1051 // if the field access is legal; e.g., during compilation
1052 if (is_static && initialize_class) {
1053 sel_klass->initialize(CHECK);
1054 }
1055
1056 if (sel_klass != current_klass) {
1057 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1058 }
1059
1060 // return information. note that the klass is set to the actual klass containing the
1061 // field, otherwise access of static fields in superclasses will not work.
1062 }
1063
1064
1065 //------------------------------------------------------------------------------------------------------------------------
1066 // Invoke resolution
1067 //
1068 // Naming conventions:
1069 //
1070 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1071 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1072 // resolved_klass the specified klass (i.e., specified via constant pool index)
1073 // recv_klass the receiver klass
1074
1075
1076 void LinkResolver::resolve_static_call(CallInfo& result,
1077 const LinkInfo& link_info,
1078 bool initialize_class, TRAPS) {
1079 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1080
1081 // The resolved class can change as a result of this resolution.
1082 Klass* resolved_klass = resolved_method->method_holder();
1083
1084 // Initialize klass (this should only happen if everything is ok)
1085 if (initialize_class && resolved_klass->should_be_initialized()) {
1086 resolved_klass->initialize(CHECK);
1087 // Use updated LinkInfo to reresolve with resolved method holder
1088 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1089 link_info.current_klass(),
1090 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1091 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1092 }
1093
1094 // setup result
1095 result.set_static(resolved_klass, resolved_method, CHECK);
1096 }
1097
1098 // throws linktime exceptions
1099 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1100
1101 Klass* resolved_klass = link_info.resolved_klass();
1102 methodHandle resolved_method;
1103 if (!resolved_klass->is_interface()) {
1104 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1105 } else {
1106 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1107 }
1108 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1109
1110 // check if static
1111 if (!resolved_method->is_static()) {
1112 ResourceMark rm(THREAD);
1113 char buf[200];
1114 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1115 resolved_method->name(),
1116 resolved_method->signature()));
1117 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1118 }
1119 return resolved_method;
1120 }
1121
1122
1123 void LinkResolver::resolve_special_call(CallInfo& result,
1124 Handle recv,
1125 const LinkInfo& link_info,
1126 TRAPS) {
1127 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1128 runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
1129 }
1130
1131 // throws linktime exceptions
1132 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1133 TRAPS) {
1134
1135 // Invokespecial is called for multiple special reasons:
1136 // <init>
1137 // local private method invocation, for classes and interfaces
1138 // superclass.method, which can also resolve to a default method
1139 // and the selected method is recalculated relative to the direct superclass
1140 // superinterface.method, which explicitly does not check shadowing
1141 Klass* resolved_klass = link_info.resolved_klass();
1142 methodHandle resolved_method;
1143
1144 if (!resolved_klass->is_interface()) {
1145 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1146 } else {
1147 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1148 }
1149
1150 // check if method name is <init>, that it is found in same klass as static type
1151 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1152 resolved_method->method_holder() != resolved_klass) {
1153 ResourceMark rm(THREAD);
1154 Exceptions::fthrow(
1155 THREAD_AND_LOCATION,
1156 vmSymbols::java_lang_NoSuchMethodError(),
1157 "%s: method %s%s not found",
1158 resolved_klass->external_name(),
1159 resolved_method->name()->as_C_string(),
1160 resolved_method->signature()->as_C_string()
1161 );
1162 return NULL;
1163 }
1164
1165 // ensure that invokespecial's interface method reference is in
1166 // a direct superinterface, not an indirect superinterface
1167 Klass* current_klass = link_info.current_klass();
1168 if (current_klass != NULL && resolved_klass->is_interface()) {
1169 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1170 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1171 ck :
1172 InstanceKlass::cast(ck->host_klass());
1173 // Disable verification for the dynamically-generated reflection bytecodes.
1174 bool is_reflect = klass_to_check->is_subclass_of(
1175 SystemDictionary::reflect_MagicAccessorImpl_klass());
1176
1177 if (!is_reflect &&
1178 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1179 ResourceMark rm(THREAD);
1180 char buf[200];
1181 jio_snprintf(buf, sizeof(buf),
1182 "Interface method reference: %s, is in an indirect superinterface of %s",
1183 Method::name_and_sig_as_C_string(resolved_klass,
1184 resolved_method->name(),
1185 resolved_method->signature()),
1186 current_klass->external_name());
1187 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1188 }
1189 }
1190
1191 // check if not static
1192 if (resolved_method->is_static()) {
1193 ResourceMark rm(THREAD);
1194 char buf[200];
1195 jio_snprintf(buf, sizeof(buf),
1196 "Expecting non-static method %s",
1197 Method::name_and_sig_as_C_string(resolved_klass,
1198 resolved_method->name(),
1199 resolved_method->signature()));
1200 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1201 }
1202
1203 if (log_develop_is_enabled(Trace, itables)) {
1204 trace_method_resolution("invokespecial resolved method: caller-class:",
1205 current_klass, resolved_klass, resolved_method, true);
1206 }
1207
1208 return resolved_method;
1209 }
1210
1211 // throws runtime exceptions
1212 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1213 const LinkInfo& link_info,
1214 const methodHandle& resolved_method,
1215 Handle recv, TRAPS) {
1216
1217 Klass* resolved_klass = link_info.resolved_klass();
1218
1219 // resolved method is selected method unless we have an old-style lookup
1220 // for a superclass method
1221 // Invokespecial for a superinterface, resolved method is selected method,
1222 // no checks for shadowing
1223 methodHandle sel_method(THREAD, resolved_method());
1224
1225 if (link_info.check_access() &&
1226 // check if the method is not <init>
1227 resolved_method->name() != vmSymbols::object_initializer_name()) {
1228
1229 Klass* current_klass = link_info.current_klass();
1230
1231 // Check if the class of the resolved_klass is a superclass
1232 // (not supertype in order to exclude interface classes) of the current class.
1233 // This check is not performed for super.invoke for interface methods
1234 // in super interfaces.
1235 if (current_klass->is_subclass_of(resolved_klass) &&
1236 current_klass != resolved_klass) {
1237 // Lookup super method
1238 Klass* super_klass = current_klass->super();
1239 sel_method = lookup_instance_method_in_klasses(super_klass,
1240 resolved_method->name(),
1241 resolved_method->signature(),
1242 Klass::find_private, CHECK);
1243 // check if found
1244 if (sel_method.is_null()) {
1245 ResourceMark rm(THREAD);
1246 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1247 Method::name_and_sig_as_C_string(resolved_klass,
1248 resolved_method->name(),
1249 resolved_method->signature()));
1250 // check loader constraints if found a different method
1251 } else if (sel_method() != resolved_method()) {
1252 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1253 }
1254 }
1255
1256 // Check that the class of objectref (the receiver) is the current class or interface,
1257 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1258 // throws IllegalAccessError.
1259 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1260 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1261 // a class. If the sender is an interface, the check has to be performed at runtime.
1262 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1263 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1264 if (sender->is_interface() && recv.not_null()) {
1265 Klass* receiver_klass = recv->klass();
1266 if (!receiver_klass->is_subtype_of(sender)) {
1267 ResourceMark rm(THREAD);
1268 char buf[500];
1269 jio_snprintf(buf, sizeof(buf),
1270 "Receiver class %s must be the current class or a subtype of interface %s",
1271 receiver_klass->name()->as_C_string(),
1272 sender->name()->as_C_string());
1273 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1274 }
1275 }
1276 }
1277
1278 // check if not static
1279 if (sel_method->is_static()) {
1280 ResourceMark rm(THREAD);
1281 char buf[200];
1282 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1283 resolved_method->name(),
1284 resolved_method->signature()));
1285 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1286 }
1287
1288 // check if abstract
1289 if (sel_method->is_abstract()) {
1290 ResourceMark rm(THREAD);
1291 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1292 Method::name_and_sig_as_C_string(resolved_klass,
1293 sel_method->name(),
1294 sel_method->signature()));
1295 }
1296
1297 if (log_develop_is_enabled(Trace, itables)) {
1298 trace_method_resolution("invokespecial selected method: resolved-class:",
1299 resolved_klass, resolved_klass, sel_method, true);
1300 }
1301
1302 // setup result
1303 result.set_static(resolved_klass, sel_method, CHECK);
1304 }
1305
1306 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1307 const LinkInfo& link_info,
1308 bool check_null_and_abstract, TRAPS) {
1309 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1310 runtime_resolve_virtual_method(result, resolved_method,
1311 link_info.resolved_klass(),
1312 recv, receiver_klass,
1313 check_null_and_abstract, CHECK);
1314 }
1315
1316 // throws linktime exceptions
1317 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1318 TRAPS) {
1319 // normal method resolution
1320 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1321
1322 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1323 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1324
1325 // check if private interface method
1326 Klass* resolved_klass = link_info.resolved_klass();
1327 Klass* current_klass = link_info.current_klass();
1328
1329 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1330 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1331 ResourceMark rm(THREAD);
1332 char buf[200];
1333 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1334 Method::name_and_sig_as_C_string(resolved_klass,
1335 resolved_method->name(),
1336 resolved_method->signature()),
1337 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1338 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1339 }
1340
1341 // check if not static
1342 if (resolved_method->is_static()) {
1343 ResourceMark rm(THREAD);
1344 char buf[200];
1345 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1346 resolved_method->name(),
1347 resolved_method->signature()));
1348 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1349 }
1350
1351 if (log_develop_is_enabled(Trace, vtables)) {
1352 trace_method_resolution("invokevirtual resolved method: caller-class:",
1353 current_klass, resolved_klass, resolved_method, false);
1354 }
1355
1356 return resolved_method;
1357 }
1358
1359 // throws runtime exceptions
1360 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1361 const methodHandle& resolved_method,
1362 Klass* resolved_klass,
1363 Handle recv,
1364 Klass* recv_klass,
1365 bool check_null_and_abstract,
1366 TRAPS) {
1367
1368 // setup default return values
1369 int vtable_index = Method::invalid_vtable_index;
1370 methodHandle selected_method;
1371
1372 // runtime method resolution
1373 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1374 THROW(vmSymbols::java_lang_NullPointerException());
1375 }
1376
1377 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1378 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1379 // a missing receiver might result in a bogus lookup.
1380 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1381
1382 // do lookup based on receiver klass using the vtable index
1383 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1384 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1385 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1386
1387 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1388 } else {
1389 // at this point we are sure that resolved_method is virtual and not
1390 // a default or miranda method; therefore, it must have a valid vtable index.
1391 assert(!resolved_method->has_itable_index(), "");
1392 vtable_index = resolved_method->vtable_index();
1393 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1394 // methods, or for final methods. Private methods never appear in the vtable
1395 // and never override other methods. As an optimization, final methods are
1396 // never put in the vtable, unless they override an existing method.
1397 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1398 // resolved method, and it can never be changed by an override.
1399 if (vtable_index == Method::nonvirtual_vtable_index) {
1400 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1401 selected_method = resolved_method;
1402 } else {
1403 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1404 }
1405 }
1406
1407 // check if method exists
1408 if (selected_method.is_null()) {
1409 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1410 }
1411
1412 // check if abstract
1413 if (check_null_and_abstract && selected_method->is_abstract()) {
1414 // Pass arguments for generating a verbose error message.
1415 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1416 }
1417
1418 if (log_develop_is_enabled(Trace, vtables)) {
1419 trace_method_resolution("invokevirtual selected method: receiver-class:",
1420 recv_klass, resolved_klass, selected_method,
1421 false, vtable_index);
1422 }
1423 // setup result
1424 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1425 }
1426
1427 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1428 const LinkInfo& link_info,
1429 bool check_null_and_abstract, TRAPS) {
1430 // throws linktime exceptions
1431 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1432 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1433 recv, recv_klass, check_null_and_abstract, CHECK);
1434 }
1435
1436 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1437 TRAPS) {
1438 // normal interface method resolution
1439 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1440 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1441 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1442
1443 return resolved_method;
1444 }
1445
1446 // throws runtime exceptions
1447 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1448 const methodHandle& resolved_method,
1449 Klass* resolved_klass,
1450 Handle recv,
1451 Klass* recv_klass,
1452 bool check_null_and_abstract, TRAPS) {
1453
1454 // check if receiver exists
1455 if (check_null_and_abstract && recv.is_null()) {
1456 THROW(vmSymbols::java_lang_NullPointerException());
1457 }
1458
1459 // check if receiver klass implements the resolved interface
1460 if (!recv_klass->is_subtype_of(resolved_klass)) {
1461 ResourceMark rm(THREAD);
1462 char buf[200];
1463 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1464 recv_klass->external_name(),
1465 resolved_klass->external_name());
1466 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1467 }
1468
1469 methodHandle selected_method = resolved_method;
1470
1471 // resolve the method in the receiver class, unless it is private
1472 if (!resolved_method()->is_private()) {
1473 // do lookup based on receiver klass
1474 // This search must match the linktime preparation search for itable initialization
1475 // to correctly enforce loader constraints for interface method inheritance.
1476 // Private methods are skipped as the resolved method was not private.
1477 selected_method = lookup_instance_method_in_klasses(recv_klass,
1478 resolved_method->name(),
1479 resolved_method->signature(),
1480 Klass::skip_private, CHECK);
1481
1482 if (selected_method.is_null() && !check_null_and_abstract) {
1483 // In theory this is a harmless placeholder value, but
1484 // in practice leaving in null affects the nsk default method tests.
1485 // This needs further study.
1486 selected_method = resolved_method;
1487 }
1488 // check if method exists
1489 if (selected_method.is_null()) {
1490 // Pass arguments for generating a verbose error message.
1491 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1492 }
1493 // check access
1494 // Throw Illegal Access Error if selected_method is not public.
1495 if (!selected_method->is_public()) {
1496 ResourceMark rm(THREAD);
1497 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1498 Method::name_and_sig_as_C_string(recv_klass,
1499 selected_method->name(),
1500 selected_method->signature()));
1501 }
1502 // check if abstract
1503 if (check_null_and_abstract && selected_method->is_abstract()) {
1504 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1505 }
1506 }
1507
1508 if (log_develop_is_enabled(Trace, itables)) {
1509 trace_method_resolution("invokeinterface selected method: receiver-class:",
1510 recv_klass, resolved_klass, selected_method, true);
1511 }
1512 // setup result
1513 if (resolved_method->has_vtable_index()) {
1514 int vtable_index = resolved_method->vtable_index();
1515 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1516 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1517 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1518 } else if (resolved_method->has_itable_index()) {
1519 int itable_index = resolved_method()->itable_index();
1520 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1521 result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
1522 } else {
1523 int index = resolved_method->vtable_index();
1524 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1525 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1526 assert(resolved_method()->is_private() ||
1527 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1528 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1529 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1530 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1531 result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, index, CHECK);
1532 }
1533 }
1534
1535
1536 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1537 const LinkInfo& link_info) {
1538 EXCEPTION_MARK;
1539 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1540 if (HAS_PENDING_EXCEPTION) {
1541 CLEAR_PENDING_EXCEPTION;
1542 return methodHandle();
1543 } else {
1544 return method_result;
1545 }
1546 }
1547
1548 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1549 const LinkInfo& link_info) {
1550 EXCEPTION_MARK;
1551 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1552 if (HAS_PENDING_EXCEPTION) {
1553 CLEAR_PENDING_EXCEPTION;
1554 return methodHandle();
1555 } else {
1556 return method_result;
1557 }
1558 }
1559
1560 methodHandle LinkResolver::resolve_virtual_call_or_null(
1561 Klass* receiver_klass,
1562 const LinkInfo& link_info) {
1563 EXCEPTION_MARK;
1564 CallInfo info;
1565 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1566 if (HAS_PENDING_EXCEPTION) {
1567 CLEAR_PENDING_EXCEPTION;
1568 return methodHandle();
1569 }
1570 return info.selected_method();
1571 }
1572
1573 methodHandle LinkResolver::resolve_interface_call_or_null(
1574 Klass* receiver_klass,
1575 const LinkInfo& link_info) {
1576 EXCEPTION_MARK;
1577 CallInfo info;
1578 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1579 if (HAS_PENDING_EXCEPTION) {
1580 CLEAR_PENDING_EXCEPTION;
1581 return methodHandle();
1582 }
1583 return info.selected_method();
1584 }
1585
1586 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1587 const LinkInfo& link_info) {
1588 EXCEPTION_MARK;
1589 CallInfo info;
1590 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1591 /*check_null_or_abstract*/false, THREAD);
1592 if (HAS_PENDING_EXCEPTION) {
1593 CLEAR_PENDING_EXCEPTION;
1594 return Method::invalid_vtable_index;
1595 }
1596 return info.vtable_index();
1597 }
1598
1599 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1600 EXCEPTION_MARK;
1601 CallInfo info;
1602 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1603 if (HAS_PENDING_EXCEPTION) {
1604 CLEAR_PENDING_EXCEPTION;
1605 return methodHandle();
1606 }
1607 return info.selected_method();
1608 }
1609
1610 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1611 EXCEPTION_MARK;
1612 CallInfo info;
1613 resolve_special_call(info, Handle(), link_info, THREAD);
1614 if (HAS_PENDING_EXCEPTION) {
1615 CLEAR_PENDING_EXCEPTION;
1616 return methodHandle();
1617 }
1618 return info.selected_method();
1619 }
1620
1621
1622
1623 //------------------------------------------------------------------------------------------------------------------------
1624 // ConstantPool entries
1625
1626 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1627 switch (byte) {
1628 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1629 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1630 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1631 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1632 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1633 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1634 default : break;
1635 }
1636 return;
1637 }
1638
1639 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1640 const methodHandle& attached_method,
1641 Bytecodes::Code byte, TRAPS) {
1642 Klass* defc = attached_method->method_holder();
1643 Symbol* name = attached_method->name();
1644 Symbol* type = attached_method->signature();
1645 LinkInfo link_info(defc, name, type);
1646 switch(byte) {
1647 case Bytecodes::_invokevirtual:
1648 resolve_virtual_call(result, recv, recv->klass(), link_info,
1649 /*check_null_and_abstract=*/true, CHECK);
1650 break;
1651 case Bytecodes::_invokeinterface:
1652 resolve_interface_call(result, recv, recv->klass(), link_info,
1653 /*check_null_and_abstract=*/true, CHECK);
1654 break;
1655 case Bytecodes::_invokestatic:
1656 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1657 break;
1658 case Bytecodes::_invokespecial:
1659 resolve_special_call(result, recv, link_info, CHECK);
1660 break;
1661 default:
1662 fatal("bad call: %s", Bytecodes::name(byte));
1663 break;
1664 }
1665 }
1666
1667 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1668 LinkInfo link_info(pool, index, CHECK);
1669 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1670 }
1671
1672
1673 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1674 const constantPoolHandle& pool, int index, TRAPS) {
1675 LinkInfo link_info(pool, index, CHECK);
1676 resolve_special_call(result, recv, link_info, CHECK);
1677 }
1678
1679
1680 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1681 const constantPoolHandle& pool, int index,
1682 TRAPS) {
1683
1684 LinkInfo link_info(pool, index, CHECK);
1685 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1686 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1687 }
1688
1689
1690 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1691 LinkInfo link_info(pool, index, CHECK);
1692 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1693 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1694 }
1695
1696
1697 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1698 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1699 LinkInfo link_info(pool, index, CHECK);
1700 if (TraceMethodHandles) {
1701 ResourceMark rm(THREAD);
1702 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1703 link_info.signature()->as_C_string());
1704 }
1705 resolve_handle_call(result, link_info, CHECK);
1706 }
1707
1708 void LinkResolver::resolve_handle_call(CallInfo& result,
1709 const LinkInfo& link_info,
1710 TRAPS) {
1711 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1712 Klass* resolved_klass = link_info.resolved_klass();
1713 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1714 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1715 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1716 Handle resolved_appendix;
1717 Handle resolved_method_type;
1718 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1719 &resolved_appendix, &resolved_method_type, CHECK);
1720 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1721 }
1722
1723 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1724 Symbol* method_name = pool->name_ref_at(index);
1725 Symbol* method_signature = pool->signature_ref_at(index);
1726 Klass* current_klass = pool->pool_holder();
1727
1728 // Resolve the bootstrap specifier (BSM + optional arguments).
1729 Handle bootstrap_specifier;
1730 // Check if CallSite has been bound already:
1731 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1732 int pool_index = cpce->constant_pool_index();
1733
1734 if (cpce->is_f1_null()) {
1735 if (cpce->indy_resolution_failed()) {
1736 ConstantPool::throw_resolution_error(pool,
1737 ResolutionErrorTable::encode_cpcache_index(index),
1738 CHECK);
1739 }
1740
1741 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1742 // reference to a method handle which will be the bootstrap method for a dynamic
1743 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1744 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1745 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1746 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1747 // this bootstrap method will encounter the resolution of MethodHandleInError.
1748 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1749 Exceptions::wrap_dynamic_exception(CHECK);
1750 assert(bsm_info != NULL, "");
1751 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1752 bootstrap_specifier = Handle(THREAD, bsm_info);
1753 }
1754 if (!cpce->is_f1_null()) {
1755 methodHandle method( THREAD, cpce->f1_as_method());
1756 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1757 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1758 result.set_handle(method, appendix, method_type, THREAD);
1759 Exceptions::wrap_dynamic_exception(CHECK);
1760 return;
1761 }
1762
1763 if (TraceMethodHandles) {
1764 ResourceMark rm(THREAD);
1765 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1766 ConstantPool::decode_invokedynamic_index(index),
1767 method_name->as_C_string(), method_signature->as_C_string(),
1768 current_klass->name()->as_C_string());
1769 tty->print(" BSM info: "); bootstrap_specifier->print();
1770 }
1771
1772 resolve_dynamic_call(result, pool_index, bootstrap_specifier, method_name,
1773 method_signature, current_klass, THREAD);
1774 if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1775 int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
1776 bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
1777 encoded_index,
1778 pool()->tag_at(pool_index),
1779 CHECK);
1780 if (!recorded_res_status) {
1781 // Another thread got here just before we did. So, either use the method
1782 // that it resolved or throw the LinkageError exception that it threw.
1783 if (!cpce->is_f1_null()) {
1784 methodHandle method( THREAD, cpce->f1_as_method());
1785 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1786 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1787 result.set_handle(method, appendix, method_type, THREAD);
1788 Exceptions::wrap_dynamic_exception(CHECK);
1789 } else {
1790 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
1791 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
1792 }
1793 return;
1794 }
1795 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
1796 }
1797 }
1798
1799 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1800 int pool_index,
1801 Handle bootstrap_specifier,
1802 Symbol* method_name, Symbol* method_signature,
1803 Klass* current_klass,
1804 TRAPS) {
1805 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1806 // The appendix argument is likely to be a freshly-created CallSite.
1807 Handle resolved_appendix;
1808 Handle resolved_method_type;
1809 methodHandle resolved_method =
1810 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1811 pool_index,
1812 bootstrap_specifier,
1813 method_name, method_signature,
1814 &resolved_appendix,
1815 &resolved_method_type,
1816 THREAD);
1817 Exceptions::wrap_dynamic_exception(CHECK);
1818 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1819 Exceptions::wrap_dynamic_exception(CHECK);
1820 }
1821
1822 // Selected method is abstract.
1823 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1824 const methodHandle& selected_method,
1825 Klass *recv_klass, TRAPS) {
1826 Klass *resolved_klass = resolved_method->method_holder();
1827 ResourceMark rm(THREAD);
1828 stringStream ss;
1829
1830 if (recv_klass != NULL) {
1831 ss.print("Receiver class %s does not define or inherit an "
1832 "implementation of the",
1833 recv_klass->external_name());
1834 } else {
1835 ss.print("Missing implementation of");
1836 }
1837
1838 assert(resolved_method.not_null(), "Sanity");
1839 ss.print(" resolved method %s%s%s%s of %s %s.",
1840 resolved_method->is_abstract() ? "abstract " : "",
1841 resolved_method->is_private() ? "private " : "",
1842 resolved_method->name()->as_C_string(),
1843 resolved_method->signature()->as_C_string(),
1844 resolved_klass->external_kind(),
1845 resolved_klass->external_name());
1846
1847 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1848 ss.print(" Selected method is %s%s%s.",
1849 selected_method->is_abstract() ? "abstract " : "",
1850 selected_method->is_private() ? "private " : "",
1851 selected_method->name_and_sig_as_C_string());
1852 }
1853
1854 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1855 }