1 /*
2 * Copyright (c) 1997, 2017, 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.inline.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "prims/methodHandles.hpp"
48 #include "prims/nativeLookup.hpp"
49 #include "runtime/compilationPolicy.hpp"
50 #include "runtime/fieldDescriptor.hpp"
51 #include "runtime/frame.inline.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/reflection.hpp"
54 #include "runtime/signature.hpp"
55 #include "runtime/thread.inline.hpp"
56 #include "runtime/vmThread.hpp"
57
58 //------------------------------------------------------------------------------------------------------------------------
59 // Implementation of CallInfo
60
61
62 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
63 int vtable_index = Method::nonvirtual_vtable_index;
64 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
65 }
66
67
68 void CallInfo::set_interface(Klass* resolved_klass,
69 Klass* selected_klass,
70 const methodHandle& resolved_method,
71 const methodHandle& selected_method,
72 int itable_index, TRAPS) {
73 // This is only called for interface methods. If the resolved_method
74 // comes from java/lang/Object, it can be the subject of a virtual call, so
75 // we should pick the vtable index from the resolved method.
76 // In that case, the caller must call set_virtual instead of set_interface.
77 assert(resolved_method->method_holder()->is_interface(), "");
78 assert(itable_index == resolved_method()->itable_index(), "");
79 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
80 }
81
82 void CallInfo::set_virtual(Klass* resolved_klass,
83 Klass* selected_klass,
84 const methodHandle& resolved_method,
85 const methodHandle& selected_method,
86 int vtable_index, TRAPS) {
87 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
88 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
89 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
90 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
91 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
92 }
93
94 void CallInfo::set_handle(const methodHandle& resolved_method,
95 Handle resolved_appendix,
96 Handle resolved_method_type, TRAPS) {
97 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
98 }
99
100 void CallInfo::set_handle(Klass* resolved_klass,
101 const methodHandle& resolved_method,
102 Handle resolved_appendix,
103 Handle resolved_method_type, TRAPS) {
104 if (resolved_method.is_null()) {
105 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
106 }
107 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
108 resolved_method->is_compiled_lambda_form(),
109 "linkMethod must return one of these");
110 int vtable_index = Method::nonvirtual_vtable_index;
111 assert(!resolved_method->has_vtable_index(), "");
112 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
113 _resolved_appendix = resolved_appendix;
114 _resolved_method_type = resolved_method_type;
115 }
116
117 void CallInfo::set_common(Klass* resolved_klass,
118 Klass* selected_klass,
119 const methodHandle& resolved_method,
120 const methodHandle& selected_method,
121 CallKind kind,
122 int index,
123 TRAPS) {
124 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
125 _resolved_klass = resolved_klass;
126 _selected_klass = selected_klass;
127 _resolved_method = resolved_method;
128 _selected_method = selected_method;
129 _call_kind = kind;
130 _call_index = index;
131 _resolved_appendix = Handle();
132 DEBUG_ONLY(verify()); // verify before making side effects
133
134 CompilationPolicy::compile_if_required(selected_method, THREAD);
135 }
136
137 // utility query for unreflecting a method
138 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
139 Klass* resolved_method_holder = resolved_method->method_holder();
140 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
141 resolved_klass = resolved_method_holder;
142 }
143 _resolved_klass = resolved_klass;
144 _selected_klass = resolved_klass;
145 _resolved_method = resolved_method;
146 _selected_method = resolved_method;
147 // classify:
148 CallKind kind = CallInfo::unknown_kind;
149 int index = resolved_method->vtable_index();
150 if (resolved_method->can_be_statically_bound()) {
151 kind = CallInfo::direct_call;
152 } else if (!resolved_method_holder->is_interface()) {
153 // Could be an Object method inherited into an interface, but still a vtable call.
154 kind = CallInfo::vtable_call;
155 } else if (!resolved_klass->is_interface()) {
156 // A default or miranda method. Compute the vtable index.
157 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
158 resolved_method);
159 assert(index >= 0 , "we should have valid vtable index at this point");
160
161 kind = CallInfo::vtable_call;
162 } else if (resolved_method->has_vtable_index()) {
163 // Can occur if an interface redeclares a method of Object.
164
165 #ifdef ASSERT
166 // Ensure that this is really the case.
167 Klass* object_klass = SystemDictionary::Object_klass();
168 Method * object_resolved_method = object_klass->vtable().method_at(index);
169 assert(object_resolved_method->name() == resolved_method->name(),
170 "Object and interface method names should match at vtable index %d, %s != %s",
171 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
172 assert(object_resolved_method->signature() == resolved_method->signature(),
173 "Object and interface method signatures should match at vtable index %d, %s != %s",
174 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
175 #endif // ASSERT
176
177 kind = CallInfo::vtable_call;
178 } else {
179 // A regular interface call.
180 kind = CallInfo::itable_call;
181 index = resolved_method->itable_index();
182 }
183 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
184 _call_kind = kind;
185 _call_index = index;
186 _resolved_appendix = Handle();
187 // Find or create a ResolvedMethod instance for this Method*
188 set_resolved_method_name(CHECK);
189
190 DEBUG_ONLY(verify());
191 }
192
193 void CallInfo::set_resolved_method_name(TRAPS) {
194 Method* m = _resolved_method();
195 assert(m != NULL, "Should already have a Method*");
196 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
197 _resolved_method_name = Handle(THREAD, rmethod_name);
198 }
199
200 #ifdef ASSERT
201 void CallInfo::verify() {
202 switch (call_kind()) { // the meaning and allowed value of index depends on kind
203 case CallInfo::direct_call:
204 if (_call_index == Method::nonvirtual_vtable_index) break;
205 // else fall through to check vtable index:
206 case CallInfo::vtable_call:
207 assert(resolved_klass()->verify_vtable_index(_call_index), "");
208 break;
209 case CallInfo::itable_call:
210 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
211 break;
212 case CallInfo::unknown_kind:
213 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
214 break;
215 default:
216 fatal("Unexpected call kind %d", call_kind());
217 }
218 }
219 #endif //ASSERT
220
221 #ifndef PRODUCT
222 void CallInfo::print() {
223 ResourceMark rm;
224 const char* kindstr;
225 switch (_call_kind) {
226 case direct_call: kindstr = "direct"; break;
227 case vtable_call: kindstr = "vtable"; break;
228 case itable_call: kindstr = "itable"; break;
229 default : kindstr = "unknown"; break;
230 }
231 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
232 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
233 }
234 #endif
235
236 //------------------------------------------------------------------------------------------------------------------------
237 // Implementation of LinkInfo
238
239 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
240 // resolve klass
241 _resolved_klass = pool->klass_ref_at(index, CHECK);
242
243 // Get name, signature, and static klass
244 _name = pool->name_ref_at(index);
245 _signature = pool->signature_ref_at(index);
246 _tag = pool->tag_ref_at(index);
247 _current_klass = pool->pool_holder();
248 _current_method = current_method;
249
250 // Coming from the constant pool always checks access
251 _check_access = true;
252 }
253
254 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
255 // resolve klass
256 _resolved_klass = pool->klass_ref_at(index, CHECK);
257
258 // Get name, signature, and static klass
259 _name = pool->name_ref_at(index);
260 _signature = pool->signature_ref_at(index);
261 _tag = pool->tag_ref_at(index);
262 _current_klass = pool->pool_holder();
263 _current_method = methodHandle();
264
265 // Coming from the constant pool always checks access
266 _check_access = true;
267 }
268
269 char* LinkInfo::method_string() const {
270 return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature);
271 }
272
273 #ifndef PRODUCT
274 void LinkInfo::print() {
275 ResourceMark rm;
276 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
277 _resolved_klass->name()->as_C_string(),
278 _name->as_C_string(),
279 _signature->as_C_string(),
280 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
281 _check_access ? "true" : "false");
282 }
283 #endif // PRODUCT
284 //------------------------------------------------------------------------------------------------------------------------
285 // Klass resolution
286
287 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
288 bool fold_type_to_class, TRAPS) {
289 Klass* base_klass = sel_klass;
290 if (fold_type_to_class) {
291 if (sel_klass->is_objArray_klass()) {
292 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
293 }
294 // The element type could be a typeArray - we only need the access
295 // check if it is an reference to another class.
296 if (!base_klass->is_instance_klass()) {
297 return; // no relevant check to do
298 }
299 }
300 Reflection::VerifyClassAccessResults vca_result =
301 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
302 if (vca_result != Reflection::ACCESS_OK) {
303 ResourceMark rm(THREAD);
304 char* msg = Reflection::verify_class_access_msg(ref_klass,
305 InstanceKlass::cast(base_klass),
306 vca_result);
307 if (msg == NULL) {
308 Exceptions::fthrow(
309 THREAD_AND_LOCATION,
310 vmSymbols::java_lang_IllegalAccessError(),
311 "failed to access class %s from class %s",
312 base_klass->external_name(),
313 ref_klass->external_name());
314 } else {
315 // Use module specific message returned by verify_class_access_msg().
316 Exceptions::fthrow(
317 THREAD_AND_LOCATION,
318 vmSymbols::java_lang_IllegalAccessError(),
319 "%s", msg);
320 }
321 }
322 }
323
324 //------------------------------------------------------------------------------------------------------------------------
325 // Method resolution
326 //
327 // According to JVM spec. $5.4.3c & $5.4.3d
328
329 // Look up method in klasses, including static methods
330 // Then look up local default methods
331 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
332 bool checkpolymorphism,
333 bool in_imethod_resolve) {
334 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
335
336 Klass* klass = link_info.resolved_klass();
337 Symbol* name = link_info.name();
338 Symbol* signature = link_info.signature();
339
340 // Ignore overpasses so statics can be found during resolution
341 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
342
343 if (klass->is_array_klass()) {
344 // Only consider klass and super klass for arrays
345 return result;
346 }
347
348 InstanceKlass* ik = InstanceKlass::cast(klass);
349
350 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
351 // ignore static and non-public methods of java.lang.Object,
352 // like clone, finalize, registerNatives.
353 if (in_imethod_resolve &&
354 result != NULL &&
355 ik->is_interface() &&
356 (result->is_static() || !result->is_public()) &&
357 result->method_holder() == SystemDictionary::Object_klass()) {
358 result = NULL;
359 }
360
361 // Before considering default methods, check for an overpass in the
362 // current class if a method has not been found.
363 if (result == NULL) {
364 result = ik->find_method(name, signature);
365 }
366
367 if (result == NULL) {
368 Array<Method*>* default_methods = ik->default_methods();
369 if (default_methods != NULL) {
370 result = InstanceKlass::find_method(default_methods, name, signature);
371 }
372 }
373
374 if (checkpolymorphism && result != NULL) {
375 vmIntrinsics::ID iid = result->intrinsic_id();
376 if (MethodHandles::is_signature_polymorphic(iid)) {
377 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
378 return NULL;
379 }
380 }
381 return result;
382 }
383
384 // returns first instance method
385 // Looks up method in classes, then looks up local default methods
386 methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
387 Symbol* name,
388 Symbol* signature, TRAPS) {
389 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
390
391 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
392 Klass* super_klass = result->method_holder()->super();
393 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
394 }
395
396 if (klass->is_array_klass()) {
397 // Only consider klass and super klass for arrays
398 return methodHandle(THREAD, result);
399 }
400
401 if (result == NULL) {
402 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
403 if (default_methods != NULL) {
404 result = InstanceKlass::find_method(default_methods, name, signature);
405 assert(result == NULL || !result->is_static(), "static defaults not allowed");
406 }
407 }
408 return methodHandle(THREAD, result);
409 }
410
411 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
412 const methodHandle& resolved_method) {
413
414 int vtable_index = Method::invalid_vtable_index;
415 Symbol* name = resolved_method->name();
416 Symbol* signature = resolved_method->signature();
417 InstanceKlass* ik = InstanceKlass::cast(klass);
418
419 // First check in default method array
420 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
421 int index = InstanceKlass::find_method_index(ik->default_methods(),
422 name, signature, Klass::find_overpass,
423 Klass::find_static, Klass::find_private);
424 if (index >= 0 ) {
425 vtable_index = ik->default_vtable_indices()->at(index);
426 }
427 }
428 if (vtable_index == Method::invalid_vtable_index) {
429 // get vtable_index for miranda methods
430 klassVtable vt = ik->vtable();
431 vtable_index = vt.index_of_miranda(name, signature);
432 }
433 return vtable_index;
434 }
435
436 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
437 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
438
439 // Specify 'true' in order to skip default methods when searching the
440 // interfaces. Function lookup_method_in_klasses() already looked for
441 // the method in the default methods table.
442 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
443 }
444
445 methodHandle LinkResolver::lookup_polymorphic_method(
446 const LinkInfo& link_info,
447 Handle *appendix_result_or_null,
448 Handle *method_type_result,
449 TRAPS) {
450 Klass* klass = link_info.resolved_klass();
451 Symbol* name = link_info.name();
452 Symbol* full_signature = link_info.signature();
453
454 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
455 if (TraceMethodHandles) {
456 ResourceMark rm(THREAD);
457 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
458 vmIntrinsics::name_at(iid), klass->external_name(),
459 name->as_C_string(), full_signature->as_C_string());
460 }
461 if ((klass == SystemDictionary::MethodHandle_klass() ||
462 klass == SystemDictionary::VarHandle_klass()) &&
463 iid != vmIntrinsics::_none) {
464 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
465 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
466 // Do not erase last argument type (MemberName) if it is a static linkTo method.
467 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
468 TempNewSymbol basic_signature =
469 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
470 if (TraceMethodHandles) {
471 ResourceMark rm(THREAD);
472 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
473 name->as_C_string(),
474 full_signature->as_C_string(),
475 basic_signature->as_C_string());
476 }
477 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
478 basic_signature,
479 CHECK_NULL);
480 if (result.not_null()) {
481 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
482 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
483 assert(basic_signature == result->signature(), "predict the result signature");
484 if (TraceMethodHandles) {
485 ttyLocker ttyl;
486 tty->print("lookup_polymorphic_method => intrinsic ");
487 result->print_on(tty);
488 }
489 }
490 return result;
491 } else if (iid == vmIntrinsics::_invokeGeneric
492 && THREAD->can_call_java()
493 && appendix_result_or_null != NULL) {
494 // This is a method with type-checking semantics.
495 // We will ask Java code to spin an adapter method for it.
496 if (!MethodHandles::enabled()) {
497 // Make sure the Java part of the runtime has been booted up.
498 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
499 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
500 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
501 Handle(),
502 Handle(),
503 true,
504 CHECK_NULL);
505 }
506 }
507
508 Handle appendix;
509 Handle method_type;
510 methodHandle result = SystemDictionary::find_method_handle_invoker(
511 klass,
512 name,
513 full_signature,
514 link_info.current_klass(),
515 &appendix,
516 &method_type,
517 CHECK_NULL);
518 if (TraceMethodHandles) {
519 ttyLocker ttyl;
520 tty->print("lookup_polymorphic_method => (via Java) ");
521 result->print_on(tty);
522 tty->print(" lookup_polymorphic_method => appendix = ");
523 if (appendix.is_null()) tty->print_cr("(none)");
524 else appendix->print_on(tty);
525 }
526 if (result.not_null()) {
527 #ifdef ASSERT
528 ResourceMark rm(THREAD);
529
530 TempNewSymbol basic_signature =
531 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
532 int actual_size_of_params = result->size_of_parameters();
533 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
534 // +1 for MethodHandle.this, +1 for trailing MethodType
535 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
536 if (appendix.not_null()) expected_size_of_params += 1;
537 if (actual_size_of_params != expected_size_of_params) {
538 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
539 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
540 result->print();
541 }
542 assert(actual_size_of_params == expected_size_of_params,
543 "%d != %d", actual_size_of_params, expected_size_of_params);
544 #endif //ASSERT
545
546 assert(appendix_result_or_null != NULL, "");
547 (*appendix_result_or_null) = appendix;
548 (*method_type_result) = method_type;
549 }
550 return result;
551 }
552 }
553 return NULL;
554 }
555
556 void LinkResolver::check_method_accessability(Klass* ref_klass,
557 Klass* resolved_klass,
558 Klass* sel_klass,
559 const methodHandle& sel_method,
560 TRAPS) {
561
562 AccessFlags flags = sel_method->access_flags();
563
564 // Special case: arrays always override "clone". JVMS 2.15.
565 // If the resolved klass is an array class, and the declaring class
566 // is java.lang.Object and the method is "clone", set the flags
567 // to public.
568 //
569 // We'll check for the method name first, as that's most likely
570 // to be false (so we'll short-circuit out of these tests).
571 if (sel_method->name() == vmSymbols::clone_name() &&
572 sel_klass == SystemDictionary::Object_klass() &&
573 resolved_klass->is_array_klass()) {
574 // We need to change "protected" to "public".
575 assert(flags.is_protected(), "clone not protected?");
576 jint new_flags = flags.as_int();
577 new_flags = new_flags & (~JVM_ACC_PROTECTED);
578 new_flags = new_flags | JVM_ACC_PUBLIC;
579 flags.set_flags(new_flags);
580 }
581 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
582
583 if (!Reflection::verify_field_access(ref_klass,
584 resolved_klass,
585 sel_klass,
586 flags,
587 true)) {
588 ResourceMark rm(THREAD);
589 Exceptions::fthrow(
590 THREAD_AND_LOCATION,
591 vmSymbols::java_lang_IllegalAccessError(),
592 "tried to access method %s.%s%s from class %s",
593 sel_klass->external_name(),
594 sel_method->name()->as_C_string(),
595 sel_method->signature()->as_C_string(),
596 ref_klass->external_name()
597 );
598 return;
599 }
600 }
601
602 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
603 const constantPoolHandle& pool, int index, TRAPS) {
604 // This method is used only
605 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
606 // and
607 // (2) in Bytecode_invoke::static_target
608 // It appears to fail when applied to an invokeinterface call site.
609 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
610 // resolve klass
611 if (code == Bytecodes::_invokedynamic) {
612 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
613 Symbol* method_name = vmSymbols::invoke_name();
614 Symbol* method_signature = pool->signature_ref_at(index);
615 Klass* current_klass = pool->pool_holder();
616 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
617 return resolve_method(link_info, code, THREAD);
618 }
619
620 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
621 Klass* resolved_klass = link_info.resolved_klass();
622
623 if (pool->has_preresolution()
624 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
625 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
626 Method* result = ConstantPool::method_at_if_loaded(pool, index);
627 if (result != NULL) {
628 return methodHandle(THREAD, result);
629 }
630 }
631
632 if (code == Bytecodes::_invokeinterface) {
633 return resolve_interface_method(link_info, code, THREAD);
634 } else if (code == Bytecodes::_invokevirtual) {
635 return resolve_method(link_info, code, THREAD);
636 } else if (!resolved_klass->is_interface()) {
637 return resolve_method(link_info, code, THREAD);
638 } else {
639 return resolve_interface_method(link_info, code, THREAD);
640 }
641 }
642
643 // Check and print a loader constraint violation message for method or interface method
644 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
645 const methodHandle& resolved_method,
646 const char* method_type, TRAPS) {
647 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
648 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
649
650 ResourceMark rm(THREAD);
651 Symbol* failed_type_symbol =
652 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
653 resolved_loader, true, CHECK);
654 if (failed_type_symbol != NULL) {
655 const char* msg = "loader constraint violation: when resolving %s"
656 " \"%s\" the class loader (instance of %s) of the current class, %s,"
657 " and the class loader (instance of %s) for the method's defining class, %s, have"
658 " different Class objects for the type %s used in the signature";
659 char* sig = link_info.method_string();
660 const char* loader1_name = SystemDictionary::loader_name(current_loader());
661 char* current = link_info.current_klass()->name()->as_C_string();
662 const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
663 char* target = resolved_method->method_holder()->name()->as_C_string();
664 char* failed_type_name = failed_type_symbol->as_C_string();
665 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
666 strlen(current) + strlen(loader2_name) + strlen(target) +
667 strlen(failed_type_name) + strlen(method_type) + 1;
668 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
669 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
670 target, failed_type_name);
671 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
672 }
673 }
674
675 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
676 Klass* current_klass,
677 Klass* sel_klass, TRAPS) {
678 Handle ref_loader(THREAD, current_klass->class_loader());
679 Handle sel_loader(THREAD, sel_klass->class_loader());
680
681 ResourceMark rm(THREAD); // needed for check_signature_loaders
682 Symbol* failed_type_symbol =
683 SystemDictionary::check_signature_loaders(sig,
684 ref_loader, sel_loader,
685 false,
686 CHECK);
687 if (failed_type_symbol != NULL) {
688 const char* msg = "loader constraint violation: when resolving field"
689 " \"%s\" the class loader (instance of %s) of the referring class, "
690 "%s, and the class loader (instance of %s) for the field's resolved "
691 "type, %s, have different Class objects for that type";
692 char* field_name = field->as_C_string();
693 const char* loader1_name = SystemDictionary::loader_name(ref_loader());
694 char* sel = sel_klass->name()->as_C_string();
695 const char* loader2_name = SystemDictionary::loader_name(sel_loader());
696 char* failed_type_name = failed_type_symbol->as_C_string();
697 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
698 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
699 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
700 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
701 failed_type_name);
702 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
703 }
704 }
705
706 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
707 Bytecodes::Code code, TRAPS) {
708
709 Handle nested_exception;
710 Klass* resolved_klass = link_info.resolved_klass();
711
712 // 1. For invokevirtual, cannot call an interface method
713 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
714 ResourceMark rm(THREAD);
715 char buf[200];
716 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
717 resolved_klass->external_name());
718 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
719 }
720
721 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
722 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
723 ResourceMark rm(THREAD);
724 char buf[200];
725 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
726 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
727 }
728
729 // 3. lookup method in resolved klass and its super klasses
730 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
731
732 // 4. lookup method in all the interfaces implemented by the resolved klass
733 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
734 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
735
736 if (resolved_method.is_null()) {
737 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
738 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
739 if (HAS_PENDING_EXCEPTION) {
740 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
741 CLEAR_PENDING_EXCEPTION;
742 }
743 }
744 }
745
746 // 5. method lookup failed
747 if (resolved_method.is_null()) {
748 ResourceMark rm(THREAD);
749 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
750 Method::name_and_sig_as_C_string(resolved_klass,
751 link_info.name(),
752 link_info.signature()),
753 nested_exception, NULL);
754 }
755
756 // 5. access checks, access checking may be turned off when calling from within the VM.
757 Klass* current_klass = link_info.current_klass();
758 if (link_info.check_access()) {
759 assert(current_klass != NULL , "current_klass should not be null");
760
761 // check if method can be accessed by the referring class
762 check_method_accessability(current_klass,
763 resolved_klass,
764 resolved_method->method_holder(),
765 resolved_method,
766 CHECK_NULL);
767
768 // check loader constraints
769 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
770 }
771
772 return resolved_method;
773 }
774
775 static void trace_method_resolution(const char* prefix,
776 Klass* klass,
777 Klass* resolved_klass,
778 const methodHandle& method,
779 bool logitables,
780 int index = -1) {
781 #ifndef PRODUCT
782 ResourceMark rm;
783 Log(itables) logi;
784 LogStream lsi(logi.trace());
785 Log(vtables) logv;
786 LogStream lsv(logv.trace());
787 outputStream* st;
788 if (logitables) {
789 st = &lsi;
790 } else {
791 st = &lsv;
792 }
793 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
794 prefix,
795 (klass == NULL ? "<NULL>" : klass->internal_name()),
796 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
797 Method::name_and_sig_as_C_string(resolved_klass,
798 method->name(),
799 method->signature()),
800 method->method_holder()->internal_name());
801 method->print_linkage_flags(st);
802 if (index != -1) {
803 st->print("vtable_index:%d", index);
804 }
805 st->cr();
806 #endif // PRODUCT
807 }
808
809 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
810 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
811
812 Klass* resolved_klass = link_info.resolved_klass();
813
814 // check if klass is interface
815 if (!resolved_klass->is_interface()) {
816 ResourceMark rm(THREAD);
817 char buf[200];
818 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
819 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
820 }
821
822 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
823 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
824 ResourceMark rm(THREAD);
825 char buf[200];
826 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
827 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
828 }
829
830 // lookup method in this interface or its super, java.lang.Object
831 // JDK8: also look for static methods
832 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
833
834 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
835 // lookup method in all the super-interfaces
836 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
837 }
838
839 if (resolved_method.is_null()) {
840 // no method found
841 ResourceMark rm(THREAD);
842 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
843 Method::name_and_sig_as_C_string(resolved_klass,
844 link_info.name(),
845 link_info.signature()));
846 }
847
848 if (link_info.check_access()) {
849 // JDK8 adds non-public interface methods, and accessability check requirement
850 Klass* current_klass = link_info.current_klass();
851
852 assert(current_klass != NULL , "current_klass should not be null");
853
854 // check if method can be accessed by the referring class
855 check_method_accessability(current_klass,
856 resolved_klass,
857 resolved_method->method_holder(),
858 resolved_method,
859 CHECK_NULL);
860
861 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
862 }
863
864 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
865 ResourceMark rm(THREAD);
866 char buf[200];
867 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
868 Method::name_and_sig_as_C_string(resolved_klass,
869 resolved_method->name(), resolved_method->signature()));
870 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
871 }
872
873 if (code == Bytecodes::_invokeinterface && resolved_method->is_private()) {
874 ResourceMark rm(THREAD);
875 char buf[200];
876
877 Klass* current_klass = link_info.current_klass();
878 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s, caller-class:%s",
879 Method::name_and_sig_as_C_string(resolved_klass,
880 resolved_method->name(),
881 resolved_method->signature()),
882 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
883 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
884 }
885
886 if (log_develop_is_enabled(Trace, itables)) {
887 char buf[200];
888 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
889 Bytecodes::name(code));
890 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
891 resolved_method, true);
892 }
893
894 return resolved_method;
895 }
896
897 //------------------------------------------------------------------------------------------------------------------------
898 // Field resolution
899
900 void LinkResolver::check_field_accessability(Klass* ref_klass,
901 Klass* resolved_klass,
902 Klass* sel_klass,
903 const fieldDescriptor& fd,
904 TRAPS) {
905 if (!Reflection::verify_field_access(ref_klass,
906 resolved_klass,
907 sel_klass,
908 fd.access_flags(),
909 true)) {
910 ResourceMark rm(THREAD);
911 Exceptions::fthrow(
912 THREAD_AND_LOCATION,
913 vmSymbols::java_lang_IllegalAccessError(),
914 "tried to access field %s.%s from class %s",
915 sel_klass->external_name(),
916 fd.name()->as_C_string(),
917 ref_klass->external_name()
918 );
919 return;
920 }
921 }
922
923 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
924 LinkInfo link_info(pool, index, method, CHECK);
925 resolve_field(fd, link_info, byte, true, CHECK);
926 }
927
928 void LinkResolver::resolve_field(fieldDescriptor& fd,
929 const LinkInfo& link_info,
930 Bytecodes::Code byte, bool initialize_class,
931 TRAPS) {
932 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
933 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
934 byte == Bytecodes::_vwithfield ||
935 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
936 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
937
938 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
939 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield
940 || byte == Bytecodes::_vwithfield);
941 // Check if there's a resolved klass containing the field
942 Klass* resolved_klass = link_info.resolved_klass();
943 Symbol* field = link_info.name();
944 Symbol* sig = link_info.signature();
945
946 if (resolved_klass == NULL) {
947 ResourceMark rm(THREAD);
948 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
949 }
950
951 // Resolve instance field
952 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
953 // check if field exists; i.e., if a klass containing the field def has been selected
954 if (sel_klass == NULL) {
955 ResourceMark rm(THREAD);
956 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
957 }
958
959 if (!link_info.check_access())
960 // Access checking may be turned off when calling from within the VM.
961 return;
962
963 // check access
964 Klass* current_klass = link_info.current_klass();
965 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
966
967 // check for errors
968 if (is_static != fd.is_static()) {
969 ResourceMark rm(THREAD);
970 char msg[200];
971 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
972 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
973 }
974
975 // A final field can be modified only
976 // (1) by methods declared in the class declaring the field and
977 // (2) by the <clinit> method (in case of a static field)
978 // or by the <init> method (in case of an instance field).
979 if (is_put && fd.access_flags().is_final()) {
980 ResourceMark rm(THREAD);
981 stringStream ss;
982
983 if (sel_klass != current_klass) {
984 // For Minimal Value Types check if the current class is an anonymous
985 // class whose host class is the Derived Value Type class (selected class)
986 // or the Value Capable Class (VCC)
987 if (byte == Bytecodes::_vwithfield) {
988 assert(sel_klass->is_value(), "Expected Value Type");
989 if (current_klass->is_instance_klass() && InstanceKlass::cast(current_klass)->is_anonymous()) {
990 Klass* host_klass = InstanceKlass::cast(current_klass)->host_klass(); // Is host VCC of DVT ?
991
992 if (sel_klass == host_klass || // Is DVT
993 (host_klass->is_instance_klass() && // Is VCC
994 InstanceKlass::cast(sel_klass)->get_vcc_klass() == host_klass)) {
995 return;
996 }
997 }
998 }
999
1000 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1001 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1002 current_klass->external_name());
1003 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1004 }
1005
1006 if (fd.constants()->pool_holder()->major_version() >= 53) {
1007 methodHandle m = link_info.current_method();
1008 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
1009 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1010 fd.is_static() &&
1011 !m()->is_static_initializer());
1012 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1013 !fd.is_static() &&
1014 !m->is_object_initializer());
1015
1016 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1017 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1018 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1019 m()->name()->as_C_string(),
1020 is_static ? "<clinit>" : "<init>");
1021 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1022 }
1023 }
1024 }
1025
1026 // initialize resolved_klass if necessary
1027 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1028 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1029 //
1030 // note 2: we don't want to force initialization if we are just checking
1031 // if the field access is legal; e.g., during compilation
1032 if (is_static && initialize_class) {
1033 sel_klass->initialize(CHECK);
1034 }
1035
1036 if (sel_klass != current_klass) {
1037 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1038 }
1039
1040 // return information. note that the klass is set to the actual klass containing the
1041 // field, otherwise access of static fields in superclasses will not work.
1042 }
1043
1044
1045 //------------------------------------------------------------------------------------------------------------------------
1046 // Invoke resolution
1047 //
1048 // Naming conventions:
1049 //
1050 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1051 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1052 // resolved_klass the specified klass (i.e., specified via constant pool index)
1053 // recv_klass the receiver klass
1054
1055
1056 void LinkResolver::resolve_static_call(CallInfo& result,
1057 const LinkInfo& link_info,
1058 bool initialize_class, TRAPS) {
1059 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1060
1061 // The resolved class can change as a result of this resolution.
1062 Klass* resolved_klass = resolved_method->method_holder();
1063
1064 // Initialize klass (this should only happen if everything is ok)
1065 if (initialize_class && resolved_klass->should_be_initialized()) {
1066 resolved_klass->initialize(CHECK);
1067 // Use updated LinkInfo to reresolve with resolved method holder
1068 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1069 link_info.current_klass(),
1070 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1071 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1072 }
1073
1074 // setup result
1075 result.set_static(resolved_klass, resolved_method, CHECK);
1076 }
1077
1078 // throws linktime exceptions
1079 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1080
1081 Klass* resolved_klass = link_info.resolved_klass();
1082 methodHandle resolved_method;
1083 if (!resolved_klass->is_interface()) {
1084 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1085 } else {
1086 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1087 }
1088 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1089
1090 // check if static
1091 if (!resolved_method->is_static()) {
1092 ResourceMark rm(THREAD);
1093 char buf[200];
1094 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1095 resolved_method->name(),
1096 resolved_method->signature()));
1097 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1098 }
1099 return resolved_method;
1100 }
1101
1102
1103 void LinkResolver::resolve_special_call(CallInfo& result,
1104 Handle recv,
1105 const LinkInfo& link_info,
1106 TRAPS) {
1107 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1108 runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
1109 }
1110
1111 // throws linktime exceptions
1112 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1113 TRAPS) {
1114
1115 // Invokespecial is called for multiple special reasons:
1116 // <init>
1117 // local private method invocation, for classes and interfaces
1118 // superclass.method, which can also resolve to a default method
1119 // and the selected method is recalculated relative to the direct superclass
1120 // superinterface.method, which explicitly does not check shadowing
1121 Klass* resolved_klass = link_info.resolved_klass();
1122 methodHandle resolved_method;
1123
1124 if (!resolved_klass->is_interface()) {
1125 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1126 } else {
1127 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1128 }
1129
1130 // check if method name is <init>, that it is found in same klass as static type
1131 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1132 resolved_method->method_holder() != resolved_klass) {
1133 ResourceMark rm(THREAD);
1134 Exceptions::fthrow(
1135 THREAD_AND_LOCATION,
1136 vmSymbols::java_lang_NoSuchMethodError(),
1137 "%s: method %s%s not found",
1138 resolved_klass->external_name(),
1139 resolved_method->name()->as_C_string(),
1140 resolved_method->signature()->as_C_string()
1141 );
1142 return NULL;
1143 }
1144
1145 // check if invokespecial's interface method reference is in an indirect superinterface
1146 Klass* current_klass = link_info.current_klass();
1147 if (current_klass != NULL && resolved_klass->is_interface()) {
1148 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1149 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1150 ck :
1151 InstanceKlass::cast(ck->host_klass());
1152 // Disable verification for the dynamically-generated reflection bytecodes.
1153 bool is_reflect = klass_to_check->is_subclass_of(
1154 SystemDictionary::reflect_MagicAccessorImpl_klass());
1155
1156 if (!is_reflect &&
1157 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1158 ResourceMark rm(THREAD);
1159 char buf[200];
1160 jio_snprintf(buf, sizeof(buf),
1161 "Interface method reference: %s, is in an indirect superinterface of %s",
1162 Method::name_and_sig_as_C_string(resolved_klass,
1163 resolved_method->name(),
1164 resolved_method->signature()),
1165 current_klass->external_name());
1166 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1167 }
1168 }
1169
1170 // check if not static
1171 if (resolved_method->is_static()) {
1172 ResourceMark rm(THREAD);
1173 char buf[200];
1174 jio_snprintf(buf, sizeof(buf),
1175 "Expecting non-static method %s",
1176 Method::name_and_sig_as_C_string(resolved_klass,
1177 resolved_method->name(),
1178 resolved_method->signature()));
1179 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1180 }
1181
1182 if (log_develop_is_enabled(Trace, itables)) {
1183 trace_method_resolution("invokespecial resolved method: caller-class:",
1184 current_klass, resolved_klass, resolved_method, true);
1185 }
1186
1187 return resolved_method;
1188 }
1189
1190 // throws runtime exceptions
1191 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1192 const LinkInfo& link_info,
1193 const methodHandle& resolved_method,
1194 Handle recv, TRAPS) {
1195
1196 Klass* resolved_klass = link_info.resolved_klass();
1197
1198 // resolved method is selected method unless we have an old-style lookup
1199 // for a superclass method
1200 // Invokespecial for a superinterface, resolved method is selected method,
1201 // no checks for shadowing
1202 methodHandle sel_method(THREAD, resolved_method());
1203
1204 if (link_info.check_access() &&
1205 // check if the method is not <init>
1206 resolved_method->name() != vmSymbols::object_initializer_name()) {
1207
1208 // check if this is an old-style super call and do a new lookup if so
1209 // a) check if ACC_SUPER flag is set for the current class
1210 Klass* current_klass = link_info.current_klass();
1211 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1212 // b) check if the class of the resolved_klass is a superclass
1213 // (not supertype in order to exclude interface classes) of the current class.
1214 // This check is not performed for super.invoke for interface methods
1215 // in super interfaces.
1216 current_klass->is_subclass_of(resolved_klass) &&
1217 current_klass != resolved_klass) {
1218 // Lookup super method
1219 Klass* super_klass = current_klass->super();
1220 sel_method = lookup_instance_method_in_klasses(super_klass,
1221 resolved_method->name(),
1222 resolved_method->signature(), CHECK);
1223 // check if found
1224 if (sel_method.is_null()) {
1225 ResourceMark rm(THREAD);
1226 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1227 Method::name_and_sig_as_C_string(resolved_klass,
1228 resolved_method->name(),
1229 resolved_method->signature()));
1230 // check loader constraints if found a different method
1231 } else if (sel_method() != resolved_method()) {
1232 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1233 }
1234 }
1235
1236 // Check that the class of objectref (the receiver) is the current class or interface,
1237 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1238 // throws IllegalAccessError.
1239 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1240 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1241 // a class. If the sender is an interface, the check has to be performed at runtime.
1242 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1243 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1244 if (sender->is_interface() && recv.not_null()) {
1245 Klass* receiver_klass = recv->klass();
1246 if (!receiver_klass->is_subtype_of(sender)) {
1247 ResourceMark rm(THREAD);
1248 char buf[500];
1249 jio_snprintf(buf, sizeof(buf),
1250 "Receiver class %s must be the current class or a subtype of interface %s",
1251 receiver_klass->name()->as_C_string(),
1252 sender->name()->as_C_string());
1253 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1254 }
1255 }
1256 }
1257
1258 // check if not static
1259 if (sel_method->is_static()) {
1260 ResourceMark rm(THREAD);
1261 char buf[200];
1262 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1263 resolved_method->name(),
1264 resolved_method->signature()));
1265 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1266 }
1267
1268 // check if abstract
1269 if (sel_method->is_abstract()) {
1270 ResourceMark rm(THREAD);
1271 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1272 Method::name_and_sig_as_C_string(resolved_klass,
1273 sel_method->name(),
1274 sel_method->signature()));
1275 }
1276
1277 if (log_develop_is_enabled(Trace, itables)) {
1278 trace_method_resolution("invokespecial selected method: resolved-class:",
1279 resolved_klass, resolved_klass, sel_method, true);
1280 }
1281
1282 // setup result
1283 result.set_static(resolved_klass, sel_method, CHECK);
1284 }
1285
1286 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1287 const LinkInfo& link_info,
1288 bool check_null_and_abstract, TRAPS) {
1289 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1290 runtime_resolve_virtual_method(result, resolved_method,
1291 link_info.resolved_klass(),
1292 recv, receiver_klass,
1293 check_null_and_abstract, CHECK);
1294 }
1295
1296 // throws linktime exceptions
1297 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1298 TRAPS) {
1299 // normal method resolution
1300 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1301
1302 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1303 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1304
1305 // check if private interface method
1306 Klass* resolved_klass = link_info.resolved_klass();
1307 Klass* current_klass = link_info.current_klass();
1308
1309 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1310 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1311 ResourceMark rm(THREAD);
1312 char buf[200];
1313 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1314 Method::name_and_sig_as_C_string(resolved_klass,
1315 resolved_method->name(),
1316 resolved_method->signature()),
1317 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1318 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1319 }
1320
1321 // check if not static
1322 if (resolved_method->is_static()) {
1323 ResourceMark rm(THREAD);
1324 char buf[200];
1325 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1326 resolved_method->name(),
1327 resolved_method->signature()));
1328 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1329 }
1330
1331 if (log_develop_is_enabled(Trace, vtables)) {
1332 trace_method_resolution("invokevirtual resolved method: caller-class:",
1333 current_klass, resolved_klass, resolved_method, false);
1334 }
1335
1336 return resolved_method;
1337 }
1338
1339 // throws runtime exceptions
1340 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1341 const methodHandle& resolved_method,
1342 Klass* resolved_klass,
1343 Handle recv,
1344 Klass* recv_klass,
1345 bool check_null_and_abstract,
1346 TRAPS) {
1347
1348 // setup default return values
1349 int vtable_index = Method::invalid_vtable_index;
1350 methodHandle selected_method;
1351
1352 // runtime method resolution
1353 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1354 THROW(vmSymbols::java_lang_NullPointerException());
1355 }
1356
1357 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1358 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1359 // a missing receiver might result in a bogus lookup.
1360 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1361
1362 // do lookup based on receiver klass using the vtable index
1363 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1364 vtable_index = vtable_index_of_interface_method(resolved_klass,
1365 resolved_method);
1366 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1367
1368 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1369 } else {
1370 // at this point we are sure that resolved_method is virtual and not
1371 // a default or miranda method; therefore, it must have a valid vtable index.
1372 assert(!resolved_method->has_itable_index(), "");
1373 vtable_index = resolved_method->vtable_index();
1374 // We could get a negative vtable_index for final methods,
1375 // because as an optimization they are they are never put in the vtable,
1376 // unless they override an existing method.
1377 // If we do get a negative, it means the resolved method is the the selected
1378 // method, and it can never be changed by an override.
1379 if (vtable_index == Method::nonvirtual_vtable_index) {
1380 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1381 selected_method = resolved_method;
1382 } else {
1383 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1384 }
1385 }
1386
1387 // check if method exists
1388 if (selected_method.is_null()) {
1389 ResourceMark rm(THREAD);
1390 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1391 Method::name_and_sig_as_C_string(resolved_klass,
1392 resolved_method->name(),
1393 resolved_method->signature()));
1394 }
1395
1396 // check if abstract
1397 if (check_null_and_abstract && selected_method->is_abstract()) {
1398 ResourceMark rm(THREAD);
1399 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1400 Method::name_and_sig_as_C_string(resolved_klass,
1401 selected_method->name(),
1402 selected_method->signature()));
1403 }
1404
1405 if (log_develop_is_enabled(Trace, vtables)) {
1406 trace_method_resolution("invokevirtual selected method: receiver-class:",
1407 recv_klass, resolved_klass, selected_method,
1408 false, vtable_index);
1409 }
1410 // setup result
1411 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1412 }
1413
1414 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1415 const LinkInfo& link_info,
1416 bool check_null_and_abstract, TRAPS) {
1417 // throws linktime exceptions
1418 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1419 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1420 recv, recv_klass, check_null_and_abstract, CHECK);
1421 }
1422
1423 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1424 TRAPS) {
1425 // normal interface method resolution
1426 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1427 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1428 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1429
1430 return resolved_method;
1431 }
1432
1433 // throws runtime exceptions
1434 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1435 const methodHandle& resolved_method,
1436 Klass* resolved_klass,
1437 Handle recv,
1438 Klass* recv_klass,
1439 bool check_null_and_abstract, TRAPS) {
1440 // check if receiver exists
1441 if (check_null_and_abstract && recv.is_null()) {
1442 THROW(vmSymbols::java_lang_NullPointerException());
1443 }
1444
1445 // check if receiver klass implements the resolved interface
1446 if (!recv_klass->is_subtype_of(resolved_klass)) {
1447 ResourceMark rm(THREAD);
1448 char buf[200];
1449 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1450 recv_klass->external_name(),
1451 resolved_klass->external_name());
1452 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1453 }
1454
1455 // do lookup based on receiver klass
1456 // This search must match the linktime preparation search for itable initialization
1457 // to correctly enforce loader constraints for interface method inheritance
1458 methodHandle sel_method = lookup_instance_method_in_klasses(recv_klass,
1459 resolved_method->name(),
1460 resolved_method->signature(), CHECK);
1461 if (sel_method.is_null() && !check_null_and_abstract) {
1462 // In theory this is a harmless placeholder value, but
1463 // in practice leaving in null affects the nsk default method tests.
1464 // This needs further study.
1465 sel_method = resolved_method;
1466 }
1467 // check if method exists
1468 if (sel_method.is_null()) {
1469 ResourceMark rm(THREAD);
1470 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1471 Method::name_and_sig_as_C_string(recv_klass,
1472 resolved_method->name(),
1473 resolved_method->signature()));
1474 }
1475 // check access
1476 // Throw Illegal Access Error if sel_method is not public.
1477 if (!sel_method->is_public()) {
1478 ResourceMark rm(THREAD);
1479 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1480 Method::name_and_sig_as_C_string(recv_klass,
1481 sel_method->name(),
1482 sel_method->signature()));
1483 }
1484 // check if abstract
1485 if (check_null_and_abstract && sel_method->is_abstract()) {
1486 ResourceMark rm(THREAD);
1487 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1488 Method::name_and_sig_as_C_string(recv_klass,
1489 sel_method->name(),
1490 sel_method->signature()));
1491 }
1492
1493 if (log_develop_is_enabled(Trace, itables)) {
1494 trace_method_resolution("invokeinterface selected method: receiver-class:",
1495 recv_klass, resolved_klass, sel_method, true);
1496 }
1497 // setup result
1498 if (!resolved_method->has_itable_index()) {
1499 int vtable_index = resolved_method->vtable_index();
1500 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1501 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1502 } else {
1503 int itable_index = resolved_method()->itable_index();
1504 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1505 }
1506 }
1507
1508
1509 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1510 const LinkInfo& link_info) {
1511 EXCEPTION_MARK;
1512 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1513 if (HAS_PENDING_EXCEPTION) {
1514 CLEAR_PENDING_EXCEPTION;
1515 return methodHandle();
1516 } else {
1517 return method_result;
1518 }
1519 }
1520
1521 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1522 const LinkInfo& link_info) {
1523 EXCEPTION_MARK;
1524 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1525 if (HAS_PENDING_EXCEPTION) {
1526 CLEAR_PENDING_EXCEPTION;
1527 return methodHandle();
1528 } else {
1529 return method_result;
1530 }
1531 }
1532
1533 methodHandle LinkResolver::resolve_virtual_call_or_null(
1534 Klass* receiver_klass,
1535 const LinkInfo& link_info) {
1536 EXCEPTION_MARK;
1537 CallInfo info;
1538 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1539 if (HAS_PENDING_EXCEPTION) {
1540 CLEAR_PENDING_EXCEPTION;
1541 return methodHandle();
1542 }
1543 return info.selected_method();
1544 }
1545
1546 methodHandle LinkResolver::resolve_interface_call_or_null(
1547 Klass* receiver_klass,
1548 const LinkInfo& link_info) {
1549 EXCEPTION_MARK;
1550 CallInfo info;
1551 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1552 if (HAS_PENDING_EXCEPTION) {
1553 CLEAR_PENDING_EXCEPTION;
1554 return methodHandle();
1555 }
1556 return info.selected_method();
1557 }
1558
1559 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1560 const LinkInfo& link_info) {
1561 EXCEPTION_MARK;
1562 CallInfo info;
1563 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1564 /*check_null_or_abstract*/false, THREAD);
1565 if (HAS_PENDING_EXCEPTION) {
1566 CLEAR_PENDING_EXCEPTION;
1567 return Method::invalid_vtable_index;
1568 }
1569 return info.vtable_index();
1570 }
1571
1572 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1573 EXCEPTION_MARK;
1574 CallInfo info;
1575 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1576 if (HAS_PENDING_EXCEPTION) {
1577 CLEAR_PENDING_EXCEPTION;
1578 return methodHandle();
1579 }
1580 return info.selected_method();
1581 }
1582
1583 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1584 EXCEPTION_MARK;
1585 CallInfo info;
1586 resolve_special_call(info, Handle(), link_info, THREAD);
1587 if (HAS_PENDING_EXCEPTION) {
1588 CLEAR_PENDING_EXCEPTION;
1589 return methodHandle();
1590 }
1591 return info.selected_method();
1592 }
1593
1594
1595
1596 //------------------------------------------------------------------------------------------------------------------------
1597 // ConstantPool entries
1598
1599 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1600 switch (byte) {
1601 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1602 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1603 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1604 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1605 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1606 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1607 default : break;
1608 }
1609 return;
1610 }
1611
1612 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1613 const methodHandle& attached_method,
1614 Bytecodes::Code byte, TRAPS) {
1615 Klass* defc = attached_method->method_holder();
1616 Symbol* name = attached_method->name();
1617 Symbol* type = attached_method->signature();
1618 LinkInfo link_info(defc, name, type);
1619 switch(byte) {
1620 case Bytecodes::_invokevirtual:
1621 resolve_virtual_call(result, recv, recv->klass(), link_info,
1622 /*check_null_and_abstract=*/true, CHECK);
1623 break;
1624 case Bytecodes::_invokeinterface:
1625 resolve_interface_call(result, recv, recv->klass(), link_info,
1626 /*check_null_and_abstract=*/true, CHECK);
1627 break;
1628 case Bytecodes::_invokestatic:
1629 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1630 break;
1631 case Bytecodes::_invokespecial:
1632 resolve_special_call(result, recv, link_info, CHECK);
1633 break;
1634 default:
1635 fatal("bad call: %s", Bytecodes::name(byte));
1636 break;
1637 }
1638 }
1639
1640 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1641 LinkInfo link_info(pool, index, CHECK);
1642 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1643 }
1644
1645
1646 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1647 const constantPoolHandle& pool, int index, TRAPS) {
1648 LinkInfo link_info(pool, index, CHECK);
1649 resolve_special_call(result, recv, link_info, CHECK);
1650 }
1651
1652
1653 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1654 const constantPoolHandle& pool, int index,
1655 TRAPS) {
1656
1657 LinkInfo link_info(pool, index, CHECK);
1658 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1659 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1660 }
1661
1662
1663 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1664 LinkInfo link_info(pool, index, CHECK);
1665 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1666 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1667 }
1668
1669
1670 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1671 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1672 LinkInfo link_info(pool, index, CHECK);
1673 if (TraceMethodHandles) {
1674 ResourceMark rm(THREAD);
1675 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1676 link_info.signature()->as_C_string());
1677 }
1678 resolve_handle_call(result, link_info, CHECK);
1679 }
1680
1681 void LinkResolver::resolve_handle_call(CallInfo& result,
1682 const LinkInfo& link_info,
1683 TRAPS) {
1684 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1685 Klass* resolved_klass = link_info.resolved_klass();
1686 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1687 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1688 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1689 Handle resolved_appendix;
1690 Handle resolved_method_type;
1691 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1692 &resolved_appendix, &resolved_method_type, CHECK);
1693 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1694 }
1695
1696 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1697 Symbol* method_name = pool->name_ref_at(index);
1698 Symbol* method_signature = pool->signature_ref_at(index);
1699 Klass* current_klass = pool->pool_holder();
1700
1701 // Resolve the bootstrap specifier (BSM + optional arguments).
1702 Handle bootstrap_specifier;
1703 // Check if CallSite has been bound already:
1704 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1705 int pool_index = cpce->constant_pool_index();
1706
1707 if (cpce->is_f1_null()) {
1708 if (cpce->indy_resolution_failed()) {
1709 ConstantPool::throw_resolution_error(pool,
1710 ResolutionErrorTable::encode_cpcache_index(index),
1711 CHECK);
1712 }
1713
1714 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1715 // reference to a method handle which will be the bootstrap method for a dynamic
1716 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1717 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1718 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1719 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1720 // this bootstrap method will encounter the resolution of MethodHandleInError.
1721 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1722 Exceptions::wrap_dynamic_exception(CHECK);
1723 assert(bsm_info != NULL, "");
1724 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1725 bootstrap_specifier = Handle(THREAD, bsm_info);
1726 }
1727 if (!cpce->is_f1_null()) {
1728 methodHandle method( THREAD, cpce->f1_as_method());
1729 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1730 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1731 result.set_handle(method, appendix, method_type, THREAD);
1732 Exceptions::wrap_dynamic_exception(CHECK);
1733 return;
1734 }
1735
1736 if (TraceMethodHandles) {
1737 ResourceMark rm(THREAD);
1738 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1739 ConstantPool::decode_invokedynamic_index(index),
1740 method_name->as_C_string(), method_signature->as_C_string(),
1741 current_klass->name()->as_C_string());
1742 tty->print(" BSM info: "); bootstrap_specifier->print();
1743 }
1744
1745 resolve_dynamic_call(result, pool_index, bootstrap_specifier, method_name,
1746 method_signature, current_klass, THREAD);
1747 if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1748 int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
1749 bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
1750 encoded_index,
1751 pool()->tag_at(pool_index),
1752 CHECK);
1753 if (!recorded_res_status) {
1754 // Another thread got here just before we did. So, either use the method
1755 // that it resolved or throw the LinkageError exception that it threw.
1756 if (!cpce->is_f1_null()) {
1757 methodHandle method( THREAD, cpce->f1_as_method());
1758 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1759 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1760 result.set_handle(method, appendix, method_type, THREAD);
1761 Exceptions::wrap_dynamic_exception(CHECK);
1762 } else {
1763 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
1764 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
1765 }
1766 return;
1767 }
1768 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
1769 }
1770 }
1771
1772 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1773 int pool_index,
1774 Handle bootstrap_specifier,
1775 Symbol* method_name, Symbol* method_signature,
1776 Klass* current_klass,
1777 TRAPS) {
1778 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1779 // The appendix argument is likely to be a freshly-created CallSite.
1780 Handle resolved_appendix;
1781 Handle resolved_method_type;
1782 methodHandle resolved_method =
1783 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1784 pool_index,
1785 bootstrap_specifier,
1786 method_name, method_signature,
1787 &resolved_appendix,
1788 &resolved_method_type,
1789 THREAD);
1790 Exceptions::wrap_dynamic_exception(CHECK);
1791 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1792 Exceptions::wrap_dynamic_exception(CHECK);
1793 }