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 an 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 if (msg == NULL) {
310 Exceptions::fthrow(
311 THREAD_AND_LOCATION,
312 vmSymbols::java_lang_IllegalAccessError(),
313 "failed to access class %s from class %s",
314 base_klass->external_name(),
315 ref_klass->external_name());
316 } else {
317 // Use module specific message returned by verify_class_access_msg().
318 Exceptions::fthrow(
319 THREAD_AND_LOCATION,
320 vmSymbols::java_lang_IllegalAccessError(),
321 "%s", msg);
322 }
323 }
324 }
325
326 //------------------------------------------------------------------------------------------------------------------------
327 // Method resolution
328 //
329 // According to JVM spec. $5.4.3c & $5.4.3d
330
331 // Look up method in klasses, including static methods
332 // Then look up local default methods
333 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
334 bool checkpolymorphism,
335 bool in_imethod_resolve) {
336 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
337
338 Klass* klass = link_info.resolved_klass();
339 Symbol* name = link_info.name();
340 Symbol* signature = link_info.signature();
341
342 // Ignore overpasses so statics can be found during resolution
343 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
344
345 if (klass->is_array_klass()) {
346 // Only consider klass and super klass for arrays
347 return result;
348 }
349
350 InstanceKlass* ik = InstanceKlass::cast(klass);
351
352 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
353 // ignore static and non-public methods of java.lang.Object,
354 // like clone, finalize, registerNatives.
355 if (in_imethod_resolve &&
356 result != NULL &&
357 ik->is_interface() &&
358 (result->is_static() || !result->is_public()) &&
359 result->method_holder() == SystemDictionary::Object_klass()) {
360 result = NULL;
361 }
362
363 // Before considering default methods, check for an overpass in the
364 // current class if a method has not been found.
365 if (result == NULL) {
366 result = ik->find_method(name, signature);
367 }
368
369 if (result == NULL) {
370 Array<Method*>* default_methods = ik->default_methods();
371 if (default_methods != NULL) {
372 result = InstanceKlass::find_method(default_methods, name, signature);
373 }
374 }
375
376 if (checkpolymorphism && result != NULL) {
377 vmIntrinsics::ID iid = result->intrinsic_id();
378 if (MethodHandles::is_signature_polymorphic(iid)) {
379 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
380 return NULL;
381 }
382 }
383 return result;
384 }
385
386 // returns first instance method
387 // Looks up method in classes, then looks up local default methods
388 methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
389 Symbol* name,
390 Symbol* signature, TRAPS) {
391 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
392
393 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
394 Klass* super_klass = result->method_holder()->super();
395 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
396 }
397
398 if (klass->is_array_klass()) {
399 // Only consider klass and super klass for arrays
400 return methodHandle(THREAD, result);
401 }
402
403 if (result == NULL) {
404 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
405 if (default_methods != NULL) {
406 result = InstanceKlass::find_method(default_methods, name, signature);
407 assert(result == NULL || !result->is_static(), "static defaults not allowed");
408 }
409 }
410 return methodHandle(THREAD, result);
411 }
412
413 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
414 const methodHandle& resolved_method) {
415
416 int vtable_index = Method::invalid_vtable_index;
417 Symbol* name = resolved_method->name();
418 Symbol* signature = resolved_method->signature();
419 InstanceKlass* ik = InstanceKlass::cast(klass);
420
421 // First check in default method array
422 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
423 int index = InstanceKlass::find_method_index(ik->default_methods(),
424 name, signature, Klass::find_overpass,
425 Klass::find_static, Klass::find_private);
426 if (index >= 0 ) {
427 vtable_index = ik->default_vtable_indices()->at(index);
428 }
429 }
430 if (vtable_index == Method::invalid_vtable_index) {
431 // get vtable_index for miranda methods
432 klassVtable vt = ik->vtable();
433 vtable_index = vt.index_of_miranda(name, signature);
434 }
435 return vtable_index;
436 }
437
438 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
439 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
440
441 // Specify 'true' in order to skip default methods when searching the
442 // interfaces. Function lookup_method_in_klasses() already looked for
443 // the method in the default methods table.
444 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
445 }
446
447 methodHandle LinkResolver::lookup_polymorphic_method(
448 const LinkInfo& link_info,
449 Handle *appendix_result_or_null,
450 Handle *method_type_result,
451 TRAPS) {
452 Klass* klass = link_info.resolved_klass();
453 Symbol* name = link_info.name();
454 Symbol* full_signature = link_info.signature();
455
456 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
457 if (TraceMethodHandles) {
458 ResourceMark rm(THREAD);
459 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
460 vmIntrinsics::name_at(iid), klass->external_name(),
461 name->as_C_string(), full_signature->as_C_string());
462 }
463 if ((klass == SystemDictionary::MethodHandle_klass() ||
464 klass == SystemDictionary::VarHandle_klass()) &&
465 iid != vmIntrinsics::_none) {
466 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
467 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
468 // Do not erase last argument type (MemberName) if it is a static linkTo method.
469 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
470 TempNewSymbol basic_signature =
471 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
472 if (TraceMethodHandles) {
473 ResourceMark rm(THREAD);
474 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
475 name->as_C_string(),
476 full_signature->as_C_string(),
477 basic_signature->as_C_string());
478 }
479 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
480 basic_signature,
481 CHECK_NULL);
482 if (result.not_null()) {
483 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
484 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
485 assert(basic_signature == result->signature(), "predict the result signature");
486 if (TraceMethodHandles) {
487 ttyLocker ttyl;
488 tty->print("lookup_polymorphic_method => intrinsic ");
489 result->print_on(tty);
490 }
491 }
492 return result;
493 } else if (iid == vmIntrinsics::_invokeGeneric
494 && THREAD->can_call_java()
495 && appendix_result_or_null != NULL) {
496 // This is a method with type-checking semantics.
497 // We will ask Java code to spin an adapter method for it.
498 if (!MethodHandles::enabled()) {
499 // Make sure the Java part of the runtime has been booted up.
500 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
501 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
502 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
503 Handle(),
504 Handle(),
505 true,
506 CHECK_NULL);
507 }
508 }
509
510 Handle appendix;
511 Handle method_type;
512 methodHandle result = SystemDictionary::find_method_handle_invoker(
513 klass,
514 name,
515 full_signature,
516 link_info.current_klass(),
517 &appendix,
518 &method_type,
519 CHECK_NULL);
520 if (TraceMethodHandles) {
521 ttyLocker ttyl;
522 tty->print("lookup_polymorphic_method => (via Java) ");
523 result->print_on(tty);
524 tty->print(" lookup_polymorphic_method => appendix = ");
525 if (appendix.is_null()) tty->print_cr("(none)");
526 else appendix->print_on(tty);
527 }
528 if (result.not_null()) {
529 #ifdef ASSERT
530 ResourceMark rm(THREAD);
531
532 TempNewSymbol basic_signature =
533 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
534 int actual_size_of_params = result->size_of_parameters();
535 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
536 // +1 for MethodHandle.this, +1 for trailing MethodType
537 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
538 if (appendix.not_null()) expected_size_of_params += 1;
539 if (actual_size_of_params != expected_size_of_params) {
540 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
541 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
542 result->print();
543 }
544 assert(actual_size_of_params == expected_size_of_params,
545 "%d != %d", actual_size_of_params, expected_size_of_params);
546 #endif //ASSERT
547
548 assert(appendix_result_or_null != NULL, "");
549 (*appendix_result_or_null) = appendix;
550 (*method_type_result) = method_type;
551 }
552 return result;
553 }
554 }
555 return NULL;
556 }
557
558 void LinkResolver::check_method_accessability(Klass* ref_klass,
559 Klass* resolved_klass,
560 Klass* sel_klass,
561 const methodHandle& sel_method,
562 TRAPS) {
563
564 AccessFlags flags = sel_method->access_flags();
565
566 // Special case: arrays always override "clone". JVMS 2.15.
567 // If the resolved klass is an array class, and the declaring class
568 // is java.lang.Object and the method is "clone", set the flags
569 // to public.
570 //
571 // We'll check for the method name first, as that's most likely
572 // to be false (so we'll short-circuit out of these tests).
573 if (sel_method->name() == vmSymbols::clone_name() &&
574 sel_klass == SystemDictionary::Object_klass() &&
575 resolved_klass->is_array_klass()) {
576 // We need to change "protected" to "public".
577 assert(flags.is_protected(), "clone not protected?");
578 jint new_flags = flags.as_int();
579 new_flags = new_flags & (~JVM_ACC_PROTECTED);
580 new_flags = new_flags | JVM_ACC_PUBLIC;
581 flags.set_flags(new_flags);
582 }
583 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
584
585 if (!Reflection::verify_field_access(ref_klass,
586 resolved_klass,
587 sel_klass,
588 flags,
589 true)) {
590 ResourceMark rm(THREAD);
591 Exceptions::fthrow(
592 THREAD_AND_LOCATION,
593 vmSymbols::java_lang_IllegalAccessError(),
594 "tried to access method %s.%s%s from class %s",
595 sel_klass->external_name(),
596 sel_method->name()->as_C_string(),
597 sel_method->signature()->as_C_string(),
598 ref_klass->external_name()
599 );
600 return;
601 }
602 }
603
604 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
605 const constantPoolHandle& pool, int index, TRAPS) {
606 // This method is used only
607 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
608 // and
609 // (2) in Bytecode_invoke::static_target
610 // It appears to fail when applied to an invokeinterface call site.
611 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
612 // resolve klass
613 if (code == Bytecodes::_invokedynamic) {
614 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
615 Symbol* method_name = vmSymbols::invoke_name();
616 Symbol* method_signature = pool->signature_ref_at(index);
617 Klass* current_klass = pool->pool_holder();
618 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
619 return resolve_method(link_info, code, THREAD);
620 }
621
622 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
623 Klass* resolved_klass = link_info.resolved_klass();
624
625 if (pool->has_preresolution()
626 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
627 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
628 Method* result = ConstantPool::method_at_if_loaded(pool, index);
629 if (result != NULL) {
630 return methodHandle(THREAD, result);
631 }
632 }
633
634 if (code == Bytecodes::_invokeinterface) {
635 return resolve_interface_method(link_info, code, THREAD);
636 } else if (code == Bytecodes::_invokevirtual) {
637 return resolve_method(link_info, code, THREAD);
638 } else if (!resolved_klass->is_interface()) {
639 return resolve_method(link_info, code, THREAD);
640 } else {
641 return resolve_interface_method(link_info, code, THREAD);
642 }
643 }
644
645 // Check and print a loader constraint violation message for method or interface method
646 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
647 const methodHandle& resolved_method,
648 const char* method_type, TRAPS) {
649 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
650 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
651
652 ResourceMark rm(THREAD);
653 Symbol* failed_type_symbol =
654 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
655 resolved_loader, true, CHECK);
656 if (failed_type_symbol != NULL) {
657 const char* msg = "loader constraint violation: when resolving %s"
658 " \"%s\" the class loader %s of the current class, %s,"
659 " and the class loader %s for the method's defining class, %s, have"
660 " different Class objects for the type %s used in the signature";
661 char* sig = link_info.method_string();
662 const char* loader1_name = java_lang_ClassLoader::describe_external(current_loader());
663 char* current = link_info.current_klass()->name()->as_C_string();
664 const char* loader2_name = java_lang_ClassLoader::describe_external(resolved_loader());
665 char* target = resolved_method->method_holder()->name()->as_C_string();
666 char* failed_type_name = failed_type_symbol->as_C_string();
667 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
668 strlen(current) + strlen(loader2_name) + strlen(target) +
669 strlen(failed_type_name) + strlen(method_type) + 1;
670 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
671 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
672 target, failed_type_name);
673 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
674 }
675 }
676
677 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
678 Klass* current_klass,
679 Klass* sel_klass, TRAPS) {
680 Handle ref_loader(THREAD, current_klass->class_loader());
681 Handle sel_loader(THREAD, sel_klass->class_loader());
682
683 ResourceMark rm(THREAD); // needed for check_signature_loaders
684 Symbol* failed_type_symbol =
685 SystemDictionary::check_signature_loaders(sig,
686 ref_loader, sel_loader,
687 false,
688 CHECK);
689 if (failed_type_symbol != NULL) {
690 const char* msg = "loader constraint violation: when resolving field"
691 " \"%s\" the class loader %s of the referring class, "
692 "%s, and the class loader %s for the field's resolved "
693 "type, %s, have different Class objects for that type";
694 char* field_name = field->as_C_string();
695 const char* loader1_name = java_lang_ClassLoader::describe_external(ref_loader());
696 char* sel = sel_klass->name()->as_C_string();
697 const char* loader2_name = java_lang_ClassLoader::describe_external(sel_loader());
698 char* failed_type_name = failed_type_symbol->as_C_string();
699 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
700 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
701 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
702 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
703 failed_type_name);
704 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
705 }
706 }
707
708 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
709 Bytecodes::Code code, TRAPS) {
710
711 Handle nested_exception;
712 Klass* resolved_klass = link_info.resolved_klass();
713
714 // 1. For invokevirtual, cannot call an interface method
715 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
716 ResourceMark rm(THREAD);
717 char buf[200];
718 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
719 resolved_klass->external_name());
720 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
721 }
722
723 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
724 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
725 ResourceMark rm(THREAD);
726 char buf[200];
727 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
728 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
729 }
730
731 // 3. lookup method in resolved klass and its super klasses
732 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
733
734 // 4. lookup method in all the interfaces implemented by the resolved klass
735 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
736 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
737
738 if (resolved_method.is_null()) {
739 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
740 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
741 if (HAS_PENDING_EXCEPTION) {
742 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
743 CLEAR_PENDING_EXCEPTION;
744 }
745 }
746 }
747
748 // 5. method lookup failed
749 if (resolved_method.is_null()) {
750 ResourceMark rm(THREAD);
751 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
752 Method::name_and_sig_as_C_string(resolved_klass,
753 link_info.name(),
754 link_info.signature()),
755 nested_exception, NULL);
756 }
757
758 // 5. access checks, access checking may be turned off when calling from within the VM.
759 Klass* current_klass = link_info.current_klass();
760 if (link_info.check_access()) {
761 assert(current_klass != NULL , "current_klass should not be null");
762
763 // check if method can be accessed by the referring class
764 check_method_accessability(current_klass,
765 resolved_klass,
766 resolved_method->method_holder(),
767 resolved_method,
768 CHECK_NULL);
769
770 // check loader constraints
771 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
772 }
773
774 return resolved_method;
775 }
776
777 static void trace_method_resolution(const char* prefix,
778 Klass* klass,
779 Klass* resolved_klass,
780 const methodHandle& method,
781 bool logitables,
782 int index = -1) {
783 #ifndef PRODUCT
784 ResourceMark rm;
785 Log(itables) logi;
786 LogStream lsi(logi.trace());
787 Log(vtables) logv;
788 LogStream lsv(logv.trace());
789 outputStream* st;
790 if (logitables) {
791 st = &lsi;
792 } else {
793 st = &lsv;
794 }
795 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
796 prefix,
797 (klass == NULL ? "<NULL>" : klass->internal_name()),
798 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
799 Method::name_and_sig_as_C_string(resolved_klass,
800 method->name(),
801 method->signature()),
802 method->method_holder()->internal_name());
803 method->print_linkage_flags(st);
804 if (index != -1) {
805 st->print("vtable_index:%d", index);
806 }
807 st->cr();
808 #endif // PRODUCT
809 }
810
811 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
812 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
813
814 Klass* resolved_klass = link_info.resolved_klass();
815
816 // check if klass is interface
817 if (!resolved_klass->is_interface()) {
818 ResourceMark rm(THREAD);
819 char buf[200];
820 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
821 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
822 }
823
824 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
825 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
826 ResourceMark rm(THREAD);
827 char buf[200];
828 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
829 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
830 }
831
832 // lookup method in this interface or its super, java.lang.Object
833 // JDK8: also look for static methods
834 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
835
836 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
837 // lookup method in all the super-interfaces
838 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
839 }
840
841 if (resolved_method.is_null()) {
842 // no method found
843 ResourceMark rm(THREAD);
844 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
845 Method::name_and_sig_as_C_string(resolved_klass,
846 link_info.name(),
847 link_info.signature()));
848 }
849
850 if (link_info.check_access()) {
851 // JDK8 adds non-public interface methods, and accessability check requirement
852 Klass* current_klass = link_info.current_klass();
853
854 assert(current_klass != NULL , "current_klass should not be null");
855
856 // check if method can be accessed by the referring class
857 check_method_accessability(current_klass,
858 resolved_klass,
859 resolved_method->method_holder(),
860 resolved_method,
861 CHECK_NULL);
862
863 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
864 }
865
866 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
867 ResourceMark rm(THREAD);
868 char buf[200];
869 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
870 Method::name_and_sig_as_C_string(resolved_klass,
871 resolved_method->name(), resolved_method->signature()));
872 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
873 }
874
875 if (code == Bytecodes::_invokeinterface && resolved_method->is_private()) {
876 ResourceMark rm(THREAD);
877 char buf[200];
878
879 Klass* current_klass = link_info.current_klass();
880 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s, caller-class:%s",
881 Method::name_and_sig_as_C_string(resolved_klass,
882 resolved_method->name(),
883 resolved_method->signature()),
884 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
885 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
886 }
887
888 if (log_develop_is_enabled(Trace, itables)) {
889 char buf[200];
890 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
891 Bytecodes::name(code));
892 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
893 resolved_method, true);
894 }
895
896 return resolved_method;
897 }
898
899 //------------------------------------------------------------------------------------------------------------------------
900 // Field resolution
901
902 void LinkResolver::check_field_accessability(Klass* ref_klass,
903 Klass* resolved_klass,
904 Klass* sel_klass,
905 const fieldDescriptor& fd,
906 TRAPS) {
907 if (!Reflection::verify_field_access(ref_klass,
908 resolved_klass,
909 sel_klass,
910 fd.access_flags(),
911 true)) {
912 ResourceMark rm(THREAD);
913 Exceptions::fthrow(
914 THREAD_AND_LOCATION,
915 vmSymbols::java_lang_IllegalAccessError(),
916 "tried to access field %s.%s from class %s",
917 sel_klass->external_name(),
918 fd.name()->as_C_string(),
919 ref_klass->external_name()
920 );
921 return;
922 }
923 }
924
925 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
926 LinkInfo link_info(pool, index, method, CHECK);
927 resolve_field(fd, link_info, byte, true, CHECK);
928 }
929
930 void LinkResolver::resolve_field(fieldDescriptor& fd,
931 const LinkInfo& link_info,
932 Bytecodes::Code byte, bool initialize_class,
933 TRAPS) {
934 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
935 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
936 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
937 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
938
939 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
940 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
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 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
985 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
986 current_klass->external_name());
987 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
988 }
989
990 if (fd.constants()->pool_holder()->major_version() >= 53) {
991 methodHandle m = link_info.current_method();
992 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
993 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
994 fd.is_static() &&
995 !m()->is_static_initializer());
996 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
997 !fd.is_static() &&
998 !m->is_object_initializer());
999
1000 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1001 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1002 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1003 m()->name()->as_C_string(),
1004 is_static ? "<clinit>" : "<init>");
1005 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1006 }
1007 }
1008 }
1009
1010 // initialize resolved_klass if necessary
1011 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1012 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1013 //
1014 // note 2: we don't want to force initialization if we are just checking
1015 // if the field access is legal; e.g., during compilation
1016 if (is_static && initialize_class) {
1017 sel_klass->initialize(CHECK);
1018 }
1019
1020 if (sel_klass != current_klass) {
1021 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1022 }
1023
1024 // return information. note that the klass is set to the actual klass containing the
1025 // field, otherwise access of static fields in superclasses will not work.
1026 }
1027
1028
1029 //------------------------------------------------------------------------------------------------------------------------
1030 // Invoke resolution
1031 //
1032 // Naming conventions:
1033 //
1034 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1035 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1036 // resolved_klass the specified klass (i.e., specified via constant pool index)
1037 // recv_klass the receiver klass
1038
1039
1040 void LinkResolver::resolve_static_call(CallInfo& result,
1041 const LinkInfo& link_info,
1042 bool initialize_class, TRAPS) {
1043 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1044
1045 // The resolved class can change as a result of this resolution.
1046 Klass* resolved_klass = resolved_method->method_holder();
1047
1048 // Initialize klass (this should only happen if everything is ok)
1049 if (initialize_class && resolved_klass->should_be_initialized()) {
1050 resolved_klass->initialize(CHECK);
1051 // Use updated LinkInfo to reresolve with resolved method holder
1052 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1053 link_info.current_klass(),
1054 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1055 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1056 }
1057
1058 // setup result
1059 result.set_static(resolved_klass, resolved_method, CHECK);
1060 }
1061
1062 // throws linktime exceptions
1063 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1064
1065 Klass* resolved_klass = link_info.resolved_klass();
1066 methodHandle resolved_method;
1067 if (!resolved_klass->is_interface()) {
1068 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1069 } else {
1070 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1071 }
1072 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1073
1074 // check if static
1075 if (!resolved_method->is_static()) {
1076 ResourceMark rm(THREAD);
1077 char buf[200];
1078 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1079 resolved_method->name(),
1080 resolved_method->signature()));
1081 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1082 }
1083 return resolved_method;
1084 }
1085
1086
1087 void LinkResolver::resolve_special_call(CallInfo& result,
1088 Handle recv,
1089 const LinkInfo& link_info,
1090 TRAPS) {
1091 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1092 runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
1093 }
1094
1095 // throws linktime exceptions
1096 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1097 TRAPS) {
1098
1099 // Invokespecial is called for multiple special reasons:
1100 // <init>
1101 // local private method invocation, for classes and interfaces
1102 // superclass.method, which can also resolve to a default method
1103 // and the selected method is recalculated relative to the direct superclass
1104 // superinterface.method, which explicitly does not check shadowing
1105 Klass* resolved_klass = link_info.resolved_klass();
1106 methodHandle resolved_method;
1107
1108 if (!resolved_klass->is_interface()) {
1109 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1110 } else {
1111 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1112 }
1113
1114 // check if method name is <init>, that it is found in same klass as static type
1115 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1116 resolved_method->method_holder() != resolved_klass) {
1117 ResourceMark rm(THREAD);
1118 Exceptions::fthrow(
1119 THREAD_AND_LOCATION,
1120 vmSymbols::java_lang_NoSuchMethodError(),
1121 "%s: method %s%s not found",
1122 resolved_klass->external_name(),
1123 resolved_method->name()->as_C_string(),
1124 resolved_method->signature()->as_C_string()
1125 );
1126 return NULL;
1127 }
1128
1129 // check if invokespecial's interface method reference is in an indirect superinterface
1130 Klass* current_klass = link_info.current_klass();
1131 if (current_klass != NULL && resolved_klass->is_interface()) {
1132 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1133 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1134 ck :
1135 InstanceKlass::cast(ck->host_klass());
1136 // Disable verification for the dynamically-generated reflection bytecodes.
1137 bool is_reflect = klass_to_check->is_subclass_of(
1138 SystemDictionary::reflect_MagicAccessorImpl_klass());
1139
1140 if (!is_reflect &&
1141 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1142 ResourceMark rm(THREAD);
1143 char buf[200];
1144 jio_snprintf(buf, sizeof(buf),
1145 "Interface method reference: %s, is in an indirect superinterface of %s",
1146 Method::name_and_sig_as_C_string(resolved_klass,
1147 resolved_method->name(),
1148 resolved_method->signature()),
1149 current_klass->external_name());
1150 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1151 }
1152 }
1153
1154 // check if not static
1155 if (resolved_method->is_static()) {
1156 ResourceMark rm(THREAD);
1157 char buf[200];
1158 jio_snprintf(buf, sizeof(buf),
1159 "Expecting non-static method %s",
1160 Method::name_and_sig_as_C_string(resolved_klass,
1161 resolved_method->name(),
1162 resolved_method->signature()));
1163 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1164 }
1165
1166 if (log_develop_is_enabled(Trace, itables)) {
1167 trace_method_resolution("invokespecial resolved method: caller-class:",
1168 current_klass, resolved_klass, resolved_method, true);
1169 }
1170
1171 return resolved_method;
1172 }
1173
1174 // throws runtime exceptions
1175 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1176 const LinkInfo& link_info,
1177 const methodHandle& resolved_method,
1178 Handle recv, TRAPS) {
1179
1180 Klass* resolved_klass = link_info.resolved_klass();
1181
1182 // resolved method is selected method unless we have an old-style lookup
1183 // for a superclass method
1184 // Invokespecial for a superinterface, resolved method is selected method,
1185 // no checks for shadowing
1186 methodHandle sel_method(THREAD, resolved_method());
1187
1188 if (link_info.check_access() &&
1189 // check if the method is not <init>
1190 resolved_method->name() != vmSymbols::object_initializer_name()) {
1191
1192 // check if this is an old-style super call and do a new lookup if so
1193 // a) check if ACC_SUPER flag is set for the current class
1194 Klass* current_klass = link_info.current_klass();
1195 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1196 // b) check if the class of the resolved_klass is a superclass
1197 // (not supertype in order to exclude interface classes) of the current class.
1198 // This check is not performed for super.invoke for interface methods
1199 // in super interfaces.
1200 current_klass->is_subclass_of(resolved_klass) &&
1201 current_klass != resolved_klass) {
1202 // Lookup super method
1203 Klass* super_klass = current_klass->super();
1204 sel_method = lookup_instance_method_in_klasses(super_klass,
1205 resolved_method->name(),
1206 resolved_method->signature(), CHECK);
1207 // check if found
1208 if (sel_method.is_null()) {
1209 ResourceMark rm(THREAD);
1210 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1211 Method::name_and_sig_as_C_string(resolved_klass,
1212 resolved_method->name(),
1213 resolved_method->signature()));
1214 // check loader constraints if found a different method
1215 } else if (sel_method() != resolved_method()) {
1216 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1217 }
1218 }
1219
1220 // Check that the class of objectref (the receiver) is the current class or interface,
1221 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1222 // throws IllegalAccessError.
1223 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1224 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1225 // a class. If the sender is an interface, the check has to be performed at runtime.
1226 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1227 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1228 if (sender->is_interface() && recv.not_null()) {
1229 Klass* receiver_klass = recv->klass();
1230 if (!receiver_klass->is_subtype_of(sender)) {
1231 ResourceMark rm(THREAD);
1232 char buf[500];
1233 jio_snprintf(buf, sizeof(buf),
1234 "Receiver class %s must be the current class or a subtype of interface %s",
1235 receiver_klass->name()->as_C_string(),
1236 sender->name()->as_C_string());
1237 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1238 }
1239 }
1240 }
1241
1242 // check if not static
1243 if (sel_method->is_static()) {
1244 ResourceMark rm(THREAD);
1245 char buf[200];
1246 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1247 resolved_method->name(),
1248 resolved_method->signature()));
1249 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1250 }
1251
1252 // check if abstract
1253 if (sel_method->is_abstract()) {
1254 ResourceMark rm(THREAD);
1255 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1256 Method::name_and_sig_as_C_string(resolved_klass,
1257 sel_method->name(),
1258 sel_method->signature()));
1259 }
1260
1261 if (log_develop_is_enabled(Trace, itables)) {
1262 trace_method_resolution("invokespecial selected method: resolved-class:",
1263 resolved_klass, resolved_klass, sel_method, true);
1264 }
1265
1266 // setup result
1267 result.set_static(resolved_klass, sel_method, CHECK);
1268 }
1269
1270 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1271 const LinkInfo& link_info,
1272 bool check_null_and_abstract, TRAPS) {
1273 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1274 runtime_resolve_virtual_method(result, resolved_method,
1275 link_info.resolved_klass(),
1276 recv, receiver_klass,
1277 check_null_and_abstract, CHECK);
1278 }
1279
1280 // throws linktime exceptions
1281 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1282 TRAPS) {
1283 // normal method resolution
1284 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1285
1286 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1287 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1288
1289 // check if private interface method
1290 Klass* resolved_klass = link_info.resolved_klass();
1291 Klass* current_klass = link_info.current_klass();
1292
1293 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1294 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1295 ResourceMark rm(THREAD);
1296 char buf[200];
1297 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1298 Method::name_and_sig_as_C_string(resolved_klass,
1299 resolved_method->name(),
1300 resolved_method->signature()),
1301 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1302 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1303 }
1304
1305 // check if not static
1306 if (resolved_method->is_static()) {
1307 ResourceMark rm(THREAD);
1308 char buf[200];
1309 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1310 resolved_method->name(),
1311 resolved_method->signature()));
1312 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1313 }
1314
1315 if (log_develop_is_enabled(Trace, vtables)) {
1316 trace_method_resolution("invokevirtual resolved method: caller-class:",
1317 current_klass, resolved_klass, resolved_method, false);
1318 }
1319
1320 return resolved_method;
1321 }
1322
1323 // throws runtime exceptions
1324 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1325 const methodHandle& resolved_method,
1326 Klass* resolved_klass,
1327 Handle recv,
1328 Klass* recv_klass,
1329 bool check_null_and_abstract,
1330 TRAPS) {
1331
1332 // setup default return values
1333 int vtable_index = Method::invalid_vtable_index;
1334 methodHandle selected_method;
1335
1336 // runtime method resolution
1337 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1338 THROW(vmSymbols::java_lang_NullPointerException());
1339 }
1340
1341 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1342 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1343 // a missing receiver might result in a bogus lookup.
1344 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1345
1346 // do lookup based on receiver klass using the vtable index
1347 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1348 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1349 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1350
1351 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1352 } else {
1353 // at this point we are sure that resolved_method is virtual and not
1354 // a default or miranda method; therefore, it must have a valid vtable index.
1355 assert(!resolved_method->has_itable_index(), "");
1356 vtable_index = resolved_method->vtable_index();
1357 // We could get a negative vtable_index for final methods,
1358 // because as an optimization they are never put in the vtable,
1359 // unless they override an existing method.
1360 // If we do get a negative, it means the resolved method is the the selected
1361 // method, and it can never be changed by an override.
1362 if (vtable_index == Method::nonvirtual_vtable_index) {
1363 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1364 selected_method = resolved_method;
1365 } else {
1366 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1367 }
1368 }
1369
1370 // check if method exists
1371 if (selected_method.is_null()) {
1372 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1373 }
1374
1375 // check if abstract
1376 if (check_null_and_abstract && selected_method->is_abstract()) {
1377 // Pass arguments for generating a verbose error message.
1378 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1379 }
1380
1381 if (log_develop_is_enabled(Trace, vtables)) {
1382 trace_method_resolution("invokevirtual selected method: receiver-class:",
1383 recv_klass, resolved_klass, selected_method,
1384 false, vtable_index);
1385 }
1386 // setup result
1387 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1388 }
1389
1390 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1391 const LinkInfo& link_info,
1392 bool check_null_and_abstract, TRAPS) {
1393 // throws linktime exceptions
1394 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1395 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1396 recv, recv_klass, check_null_and_abstract, CHECK);
1397 }
1398
1399 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1400 TRAPS) {
1401 // normal interface method resolution
1402 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1403 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1404 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1405
1406 return resolved_method;
1407 }
1408
1409 // throws runtime exceptions
1410 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1411 const methodHandle& resolved_method,
1412 Klass* resolved_klass,
1413 Handle recv,
1414 Klass* recv_klass,
1415 bool check_null_and_abstract, TRAPS) {
1416 // check if receiver exists
1417 if (check_null_and_abstract && recv.is_null()) {
1418 THROW(vmSymbols::java_lang_NullPointerException());
1419 }
1420
1421 // check if receiver klass implements the resolved interface
1422 if (!recv_klass->is_subtype_of(resolved_klass)) {
1423 ResourceMark rm(THREAD);
1424 char buf[200];
1425 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1426 recv_klass->external_name(),
1427 resolved_klass->external_name());
1428 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1429 }
1430
1431 // do lookup based on receiver klass
1432 // This search must match the linktime preparation search for itable initialization
1433 // to correctly enforce loader constraints for interface method inheritance
1434 methodHandle selected_method = lookup_instance_method_in_klasses(recv_klass,
1435 resolved_method->name(),
1436 resolved_method->signature(), CHECK);
1437 if (selected_method.is_null() && !check_null_and_abstract) {
1438 // In theory this is a harmless placeholder value, but
1439 // in practice leaving in null affects the nsk default method tests.
1440 // This needs further study.
1441 selected_method = resolved_method;
1442 }
1443 // check if method exists
1444 if (selected_method.is_null()) {
1445 // Pass arguments for generating a verbose error message.
1446 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1447 }
1448 // check access
1449 // Throw Illegal Access Error if selected_method is not public.
1450 if (!selected_method->is_public()) {
1451 ResourceMark rm(THREAD);
1452 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1453 Method::name_and_sig_as_C_string(recv_klass,
1454 selected_method->name(),
1455 selected_method->signature()));
1456 }
1457 // check if abstract
1458 if (check_null_and_abstract && selected_method->is_abstract()) {
1459 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1460 }
1461
1462 if (log_develop_is_enabled(Trace, itables)) {
1463 trace_method_resolution("invokeinterface selected method: receiver-class:",
1464 recv_klass, resolved_klass, selected_method, true);
1465 }
1466 // setup result
1467 if (!resolved_method->has_itable_index()) {
1468 int vtable_index = resolved_method->vtable_index();
1469 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1470 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1471 } else {
1472 int itable_index = resolved_method()->itable_index();
1473 result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
1474 }
1475 }
1476
1477
1478 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1479 const LinkInfo& link_info) {
1480 EXCEPTION_MARK;
1481 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1482 if (HAS_PENDING_EXCEPTION) {
1483 CLEAR_PENDING_EXCEPTION;
1484 return methodHandle();
1485 } else {
1486 return method_result;
1487 }
1488 }
1489
1490 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1491 const LinkInfo& link_info) {
1492 EXCEPTION_MARK;
1493 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1494 if (HAS_PENDING_EXCEPTION) {
1495 CLEAR_PENDING_EXCEPTION;
1496 return methodHandle();
1497 } else {
1498 return method_result;
1499 }
1500 }
1501
1502 methodHandle LinkResolver::resolve_virtual_call_or_null(
1503 Klass* receiver_klass,
1504 const LinkInfo& link_info) {
1505 EXCEPTION_MARK;
1506 CallInfo info;
1507 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1508 if (HAS_PENDING_EXCEPTION) {
1509 CLEAR_PENDING_EXCEPTION;
1510 return methodHandle();
1511 }
1512 return info.selected_method();
1513 }
1514
1515 methodHandle LinkResolver::resolve_interface_call_or_null(
1516 Klass* receiver_klass,
1517 const LinkInfo& link_info) {
1518 EXCEPTION_MARK;
1519 CallInfo info;
1520 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1521 if (HAS_PENDING_EXCEPTION) {
1522 CLEAR_PENDING_EXCEPTION;
1523 return methodHandle();
1524 }
1525 return info.selected_method();
1526 }
1527
1528 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1529 const LinkInfo& link_info) {
1530 EXCEPTION_MARK;
1531 CallInfo info;
1532 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1533 /*check_null_or_abstract*/false, THREAD);
1534 if (HAS_PENDING_EXCEPTION) {
1535 CLEAR_PENDING_EXCEPTION;
1536 return Method::invalid_vtable_index;
1537 }
1538 return info.vtable_index();
1539 }
1540
1541 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1542 EXCEPTION_MARK;
1543 CallInfo info;
1544 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1545 if (HAS_PENDING_EXCEPTION) {
1546 CLEAR_PENDING_EXCEPTION;
1547 return methodHandle();
1548 }
1549 return info.selected_method();
1550 }
1551
1552 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1553 EXCEPTION_MARK;
1554 CallInfo info;
1555 resolve_special_call(info, Handle(), link_info, THREAD);
1556 if (HAS_PENDING_EXCEPTION) {
1557 CLEAR_PENDING_EXCEPTION;
1558 return methodHandle();
1559 }
1560 return info.selected_method();
1561 }
1562
1563
1564
1565 //------------------------------------------------------------------------------------------------------------------------
1566 // ConstantPool entries
1567
1568 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1569 switch (byte) {
1570 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1571 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1572 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1573 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1574 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1575 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1576 default : break;
1577 }
1578 return;
1579 }
1580
1581 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1582 const methodHandle& attached_method,
1583 Bytecodes::Code byte, TRAPS) {
1584 Klass* defc = attached_method->method_holder();
1585 Symbol* name = attached_method->name();
1586 Symbol* type = attached_method->signature();
1587 LinkInfo link_info(defc, name, type);
1588 switch(byte) {
1589 case Bytecodes::_invokevirtual:
1590 resolve_virtual_call(result, recv, recv->klass(), link_info,
1591 /*check_null_and_abstract=*/true, CHECK);
1592 break;
1593 case Bytecodes::_invokeinterface:
1594 resolve_interface_call(result, recv, recv->klass(), link_info,
1595 /*check_null_and_abstract=*/true, CHECK);
1596 break;
1597 case Bytecodes::_invokestatic:
1598 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1599 break;
1600 case Bytecodes::_invokespecial:
1601 resolve_special_call(result, recv, link_info, CHECK);
1602 break;
1603 default:
1604 fatal("bad call: %s", Bytecodes::name(byte));
1605 break;
1606 }
1607 }
1608
1609 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1610 LinkInfo link_info(pool, index, CHECK);
1611 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1612 }
1613
1614
1615 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1616 const constantPoolHandle& pool, int index, TRAPS) {
1617 LinkInfo link_info(pool, index, CHECK);
1618 resolve_special_call(result, recv, link_info, CHECK);
1619 }
1620
1621
1622 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1623 const constantPoolHandle& pool, int index,
1624 TRAPS) {
1625
1626 LinkInfo link_info(pool, index, CHECK);
1627 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1628 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1629 }
1630
1631
1632 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1633 LinkInfo link_info(pool, index, CHECK);
1634 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1635 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1636 }
1637
1638
1639 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1640 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1641 LinkInfo link_info(pool, index, CHECK);
1642 if (TraceMethodHandles) {
1643 ResourceMark rm(THREAD);
1644 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1645 link_info.signature()->as_C_string());
1646 }
1647 resolve_handle_call(result, link_info, CHECK);
1648 }
1649
1650 void LinkResolver::resolve_handle_call(CallInfo& result,
1651 const LinkInfo& link_info,
1652 TRAPS) {
1653 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1654 Klass* resolved_klass = link_info.resolved_klass();
1655 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1656 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1657 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1658 Handle resolved_appendix;
1659 Handle resolved_method_type;
1660 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1661 &resolved_appendix, &resolved_method_type, CHECK);
1662 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1663 }
1664
1665 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1666 Symbol* method_name = pool->name_ref_at(index);
1667 Symbol* method_signature = pool->signature_ref_at(index);
1668 Klass* current_klass = pool->pool_holder();
1669
1670 // Resolve the bootstrap specifier (BSM + optional arguments).
1671 Handle bootstrap_specifier;
1672 // Check if CallSite has been bound already:
1673 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1674 int pool_index = cpce->constant_pool_index();
1675
1676 if (cpce->is_f1_null()) {
1677 if (cpce->indy_resolution_failed()) {
1678 ConstantPool::throw_resolution_error(pool,
1679 ResolutionErrorTable::encode_cpcache_index(index),
1680 CHECK);
1681 }
1682
1683 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1684 // reference to a method handle which will be the bootstrap method for a dynamic
1685 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1686 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1687 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1688 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1689 // this bootstrap method will encounter the resolution of MethodHandleInError.
1690 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1691 Exceptions::wrap_dynamic_exception(CHECK);
1692 assert(bsm_info != NULL, "");
1693 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1694 bootstrap_specifier = Handle(THREAD, bsm_info);
1695 }
1696 if (!cpce->is_f1_null()) {
1697 methodHandle method( THREAD, cpce->f1_as_method());
1698 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1699 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1700 result.set_handle(method, appendix, method_type, THREAD);
1701 Exceptions::wrap_dynamic_exception(CHECK);
1702 return;
1703 }
1704
1705 if (TraceMethodHandles) {
1706 ResourceMark rm(THREAD);
1707 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1708 ConstantPool::decode_invokedynamic_index(index),
1709 method_name->as_C_string(), method_signature->as_C_string(),
1710 current_klass->name()->as_C_string());
1711 tty->print(" BSM info: "); bootstrap_specifier->print();
1712 }
1713
1714 resolve_dynamic_call(result, pool_index, bootstrap_specifier, method_name,
1715 method_signature, current_klass, THREAD);
1716 if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1717 int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
1718 bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
1719 encoded_index,
1720 pool()->tag_at(pool_index),
1721 CHECK);
1722 if (!recorded_res_status) {
1723 // Another thread got here just before we did. So, either use the method
1724 // that it resolved or throw the LinkageError exception that it threw.
1725 if (!cpce->is_f1_null()) {
1726 methodHandle method( THREAD, cpce->f1_as_method());
1727 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1728 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1729 result.set_handle(method, appendix, method_type, THREAD);
1730 Exceptions::wrap_dynamic_exception(CHECK);
1731 } else {
1732 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
1733 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
1734 }
1735 return;
1736 }
1737 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
1738 }
1739 }
1740
1741 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1742 int pool_index,
1743 Handle bootstrap_specifier,
1744 Symbol* method_name, Symbol* method_signature,
1745 Klass* current_klass,
1746 TRAPS) {
1747 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1748 // The appendix argument is likely to be a freshly-created CallSite.
1749 Handle resolved_appendix;
1750 Handle resolved_method_type;
1751 methodHandle resolved_method =
1752 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1753 pool_index,
1754 bootstrap_specifier,
1755 method_name, method_signature,
1756 &resolved_appendix,
1757 &resolved_method_type,
1758 THREAD);
1759 Exceptions::wrap_dynamic_exception(CHECK);
1760 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1761 Exceptions::wrap_dynamic_exception(CHECK);
1762 }
1763
1764 // Selected method is abstract.
1765 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1766 const methodHandle& selected_method,
1767 Klass *recv_klass, TRAPS) {
1768 Klass *resolved_klass = resolved_method->method_holder();
1769 ResourceMark rm(THREAD);
1770 stringStream ss;
1771
1772 if (recv_klass != NULL) {
1773 ss.print("Receiver class %s does not define or inherit an "
1774 "implementation of the",
1775 recv_klass->external_name());
1776 } else {
1777 ss.print("Missing implementation of");
1778 }
1779
1780 assert(resolved_method.not_null(), "Sanity");
1781 ss.print(" resolved method %s%s%s%s of %s %s.",
1782 resolved_method->is_abstract() ? "abstract " : "",
1783 resolved_method->is_private() ? "private " : "",
1784 resolved_method->name()->as_C_string(),
1785 resolved_method->signature()->as_C_string(),
1786 resolved_klass->external_kind(),
1787 resolved_klass->external_name());
1788
1789 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1790 ss.print(" Selected method is %s%s%s.",
1791 selected_method->is_abstract() ? "abstract " : "",
1792 selected_method->is_private() ? "private " : "",
1793 selected_method->name_and_sig_as_C_string());
1794 }
1795
1796 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1797 }