1 /*
2 * Copyright (c) 1997, 2019, 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/constantPool.hpp"
43 #include "oops/cpCache.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/method.hpp"
46 #include "oops/objArrayKlass.hpp"
47 #include "oops/objArrayOop.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "prims/methodHandles.hpp"
50 #include "prims/nativeLookup.hpp"
51 #include "runtime/compilationPolicy.hpp"
52 #include "runtime/fieldDescriptor.inline.hpp"
53 #include "runtime/frame.inline.hpp"
54 #include "runtime/handles.inline.hpp"
55 #include "runtime/reflection.hpp"
56 #include "runtime/safepointVerifiers.hpp"
57 #include "runtime/signature.hpp"
58 #include "runtime/thread.inline.hpp"
59 #include "runtime/vmThread.hpp"
60
61 //------------------------------------------------------------------------------------------------------------------------
62 // Implementation of CallInfo
63
64
65 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
66 int vtable_index = Method::nonvirtual_vtable_index;
67 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
68 }
69
70
71 void CallInfo::set_interface(Klass* resolved_klass,
72 Klass* selected_klass,
73 const methodHandle& resolved_method,
74 const methodHandle& selected_method,
75 int itable_index, TRAPS) {
76 // This is only called for interface methods. If the resolved_method
77 // comes from java/lang/Object, it can be the subject of a virtual call, so
78 // we should pick the vtable index from the resolved method.
79 // In that case, the caller must call set_virtual instead of set_interface.
80 assert(resolved_method->method_holder()->is_interface(), "");
81 assert(itable_index == resolved_method()->itable_index(), "");
82 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
83 }
84
85 void CallInfo::set_virtual(Klass* resolved_klass,
86 Klass* selected_klass,
87 const methodHandle& resolved_method,
88 const methodHandle& selected_method,
89 int vtable_index, TRAPS) {
90 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
91 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
92 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
93 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
94 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
95 }
96
97 void CallInfo::set_handle(const methodHandle& resolved_method,
98 Handle resolved_appendix, TRAPS) {
99 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, CHECK);
100 }
101
102 void CallInfo::set_handle(Klass* resolved_klass,
103 const methodHandle& resolved_method,
104 Handle resolved_appendix, TRAPS) {
105 guarantee(resolved_method.not_null(), "resolved method is null");
106 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
107 resolved_method->is_compiled_lambda_form(),
108 "linkMethod must return one of these");
109 int vtable_index = Method::nonvirtual_vtable_index;
110 assert(!resolved_method->has_vtable_index(), "");
111 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
112 _resolved_appendix = resolved_appendix;
113 }
114
115 void CallInfo::set_common(Klass* resolved_klass,
116 Klass* selected_klass,
117 const methodHandle& resolved_method,
118 const methodHandle& selected_method,
119 CallKind kind,
120 int index,
121 TRAPS) {
122 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
123 _resolved_klass = resolved_klass;
124 _selected_klass = selected_klass;
125 _resolved_method = resolved_method;
126 _selected_method = selected_method;
127 _call_kind = kind;
128 _call_index = index;
129 _resolved_appendix = Handle();
130 DEBUG_ONLY(verify()); // verify before making side effects
131
132 CompilationPolicy::compile_if_required(selected_method, THREAD);
133 }
134
135 // utility query for unreflecting a method
136 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
137 Klass* resolved_method_holder = resolved_method->method_holder();
138 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
139 resolved_klass = resolved_method_holder;
140 }
141 _resolved_klass = resolved_klass;
142 _selected_klass = resolved_klass;
143 _resolved_method = resolved_method;
144 _selected_method = resolved_method;
145 // classify:
146 CallKind kind = CallInfo::unknown_kind;
147 int index = resolved_method->vtable_index();
148 if (resolved_method->can_be_statically_bound()) {
149 kind = CallInfo::direct_call;
150 } else if (!resolved_method_holder->is_interface()) {
151 // Could be an Object method inherited into an interface, but still a vtable call.
152 kind = CallInfo::vtable_call;
153 } else if (!resolved_klass->is_interface()) {
154 // A default or miranda method. Compute the vtable index.
155 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
156 resolved_method);
157 assert(index >= 0 , "we should have valid vtable index at this point");
158
159 kind = CallInfo::vtable_call;
160 } else if (resolved_method->has_vtable_index()) {
161 // Can occur if an interface redeclares a method of Object.
162
163 #ifdef ASSERT
164 // Ensure that this is really the case.
165 Klass* object_klass = SystemDictionary::Object_klass();
166 Method * object_resolved_method = object_klass->vtable().method_at(index);
167 assert(object_resolved_method->name() == resolved_method->name(),
168 "Object and interface method names should match at vtable index %d, %s != %s",
169 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
170 assert(object_resolved_method->signature() == resolved_method->signature(),
171 "Object and interface method signatures should match at vtable index %d, %s != %s",
172 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
173 #endif // ASSERT
174
175 kind = CallInfo::vtable_call;
176 } else {
177 // A regular interface call.
178 kind = CallInfo::itable_call;
179 index = resolved_method->itable_index();
180 }
181 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
182 _call_kind = kind;
183 _call_index = index;
184 _resolved_appendix = Handle();
185 // Find or create a ResolvedMethod instance for this Method*
186 set_resolved_method_name(CHECK);
187
188 DEBUG_ONLY(verify());
189 }
190
191 void CallInfo::set_resolved_method_name(TRAPS) {
192 Method* m = _resolved_method();
193 assert(m != NULL, "Should already have a Method*");
194 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
195 _resolved_method_name = Handle(THREAD, rmethod_name);
196 }
197
198 #ifdef ASSERT
199 void CallInfo::verify() {
200 switch (call_kind()) { // the meaning and allowed value of index depends on kind
201 case CallInfo::direct_call:
202 if (_call_index == Method::nonvirtual_vtable_index) break;
203 // else fall through to check vtable index:
204 case CallInfo::vtable_call:
205 assert(resolved_klass()->verify_vtable_index(_call_index), "");
206 break;
207 case CallInfo::itable_call:
208 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
209 break;
210 case CallInfo::unknown_kind:
211 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
212 break;
213 default:
214 fatal("Unexpected call kind %d", call_kind());
215 }
216 }
217 #endif // ASSERT
218
219 #ifndef PRODUCT
220 void CallInfo::print() {
221 ResourceMark rm;
222 const char* kindstr;
223 switch (_call_kind) {
224 case direct_call: kindstr = "direct"; break;
225 case vtable_call: kindstr = "vtable"; break;
226 case itable_call: kindstr = "itable"; break;
227 default : kindstr = "unknown"; break;
228 }
229 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
230 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
231 }
232 #endif
233
234 //------------------------------------------------------------------------------------------------------------------------
235 // Implementation of LinkInfo
236
237 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
238 // resolve klass
239 _resolved_klass = pool->klass_ref_at(index, CHECK);
240
241 // Get name, signature, and static klass
242 _name = pool->name_ref_at(index);
243 _signature = pool->signature_ref_at(index);
244 _tag = pool->tag_ref_at(index);
245 _current_klass = pool->pool_holder();
246 _current_method = current_method;
247
248 // Coming from the constant pool always checks access
249 _check_access = true;
250 }
251
252 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
253 // resolve klass
254 _resolved_klass = pool->klass_ref_at(index, CHECK);
255
256 // Get name, signature, and static klass
257 _name = pool->name_ref_at(index);
258 _signature = pool->signature_ref_at(index);
259 _tag = pool->tag_ref_at(index);
260 _current_klass = pool->pool_holder();
261 _current_method = methodHandle();
262
263 // Coming from the constant pool always checks access
264 _check_access = true;
265 }
266
267 char* LinkInfo::method_string() const {
268 return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature);
269 }
270
271 #ifndef PRODUCT
272 void LinkInfo::print() {
273 ResourceMark rm;
274 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
275 _resolved_klass->name()->as_C_string(),
276 _name->as_C_string(),
277 _signature->as_C_string(),
278 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
279 _check_access ? "true" : "false");
280 }
281 #endif // PRODUCT
282 //------------------------------------------------------------------------------------------------------------------------
283 // Klass resolution
284
285 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
286 bool fold_type_to_class, TRAPS) {
287 Klass* base_klass = sel_klass;
288 if (fold_type_to_class) {
289 if (sel_klass->is_objArray_klass()) {
290 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
291 }
292 // The element type could be a typeArray - we only need the access
293 // check if it is a reference to another class.
294 if (!base_klass->is_instance_klass()) {
295 return; // no relevant check to do
296 }
297 }
298 Reflection::VerifyClassAccessResults vca_result =
299 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
300 if (vca_result != Reflection::ACCESS_OK) {
301 ResourceMark rm(THREAD);
302 char* msg = Reflection::verify_class_access_msg(ref_klass,
303 InstanceKlass::cast(base_klass),
304 vca_result);
305 bool same_module = (base_klass->module() == ref_klass->module());
306 if (msg == NULL) {
307 Exceptions::fthrow(
308 THREAD_AND_LOCATION,
309 vmSymbols::java_lang_IllegalAccessError(),
310 "failed to access class %s from class %s (%s%s%s)",
311 base_klass->external_name(),
312 ref_klass->external_name(),
313 (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(),
314 (same_module) ? "" : "; ",
315 (same_module) ? "" : ref_klass->class_in_module_of_loader());
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,
391 Klass::PrivateLookupMode private_mode, TRAPS) {
392 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
393
394 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
395 Klass* super_klass = result->method_holder()->super();
396 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
397 }
398
399 if (klass->is_array_klass()) {
400 // Only consider klass and super klass for arrays
401 return methodHandle(THREAD, result);
402 }
403
404 if (result == NULL) {
405 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
406 if (default_methods != NULL) {
407 result = InstanceKlass::find_method(default_methods, name, signature);
408 assert(result == NULL || !result->is_static(), "static defaults not allowed");
409 }
410 }
411 return methodHandle(THREAD, result);
412 }
413
414 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
415 const methodHandle& resolved_method) {
416
417 int vtable_index = Method::invalid_vtable_index;
418 Symbol* name = resolved_method->name();
419 Symbol* signature = resolved_method->signature();
420 InstanceKlass* ik = InstanceKlass::cast(klass);
421
422 // First check in default method array
423 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
424 int index = InstanceKlass::find_method_index(ik->default_methods(),
425 name, signature, Klass::find_overpass,
426 Klass::find_static, Klass::find_private);
427 if (index >= 0 ) {
428 vtable_index = ik->default_vtable_indices()->at(index);
429 }
430 }
431 if (vtable_index == Method::invalid_vtable_index) {
432 // get vtable_index for miranda methods
433 klassVtable vt = ik->vtable();
434 vtable_index = vt.index_of_miranda(name, signature);
435 }
436 return vtable_index;
437 }
438
439 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
440 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
441
442 // Specify 'true' in order to skip default methods when searching the
443 // interfaces. Function lookup_method_in_klasses() already looked for
444 // the method in the default methods table.
445 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
446 }
447
448 methodHandle LinkResolver::lookup_polymorphic_method(
449 const LinkInfo& link_info,
450 Handle *appendix_result_or_null,
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 CHECK_NULL);
519 if (TraceMethodHandles) {
520 ttyLocker ttyl;
521 tty->print("lookup_polymorphic_method => (via Java) ");
522 result->print_on(tty);
523 tty->print(" lookup_polymorphic_method => appendix = ");
524 if (appendix.is_null()) tty->print_cr("(none)");
525 else appendix->print_on(tty);
526 }
527 if (result.not_null()) {
528 #ifdef ASSERT
529 ResourceMark rm(THREAD);
530
531 TempNewSymbol basic_signature =
532 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
533 int actual_size_of_params = result->size_of_parameters();
534 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
535 // +1 for MethodHandle.this, +1 for trailing MethodType
536 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
537 if (appendix.not_null()) expected_size_of_params += 1;
538 if (actual_size_of_params != expected_size_of_params) {
539 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
540 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
541 result->print();
542 }
543 assert(actual_size_of_params == expected_size_of_params,
544 "%d != %d", actual_size_of_params, expected_size_of_params);
545 #endif //ASSERT
546
547 assert(appendix_result_or_null != NULL, "");
548 (*appendix_result_or_null) = appendix;
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 bool can_access = Reflection::verify_member_access(ref_klass,
584 resolved_klass,
585 sel_klass,
586 flags,
587 true, false, CHECK);
588 // Any existing exceptions that may have been thrown, for example LinkageErrors
589 // from nest-host resolution, have been allowed to propagate.
590 if (!can_access) {
591 ResourceMark rm(THREAD);
592 bool same_module = (sel_klass->module() == ref_klass->module());
593 Exceptions::fthrow(
594 THREAD_AND_LOCATION,
595 vmSymbols::java_lang_IllegalAccessError(),
596 "class %s tried to access %s%s%smethod %s.%s%s (%s%s%s)",
597 ref_klass->external_name(),
598 sel_method->is_abstract() ? "abstract " : "",
599 sel_method->is_protected() ? "protected " : "",
600 sel_method->is_private() ? "private " : "",
601 sel_klass->external_name(),
602 sel_method->name()->as_C_string(),
603 sel_method->signature()->as_C_string(),
604 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
605 (same_module) ? "" : "; ",
606 (same_module) ? "" : sel_klass->class_in_module_of_loader()
607 );
608 return;
609 }
610 }
611
612 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
613 const constantPoolHandle& pool, int index, TRAPS) {
614 // This method is used only
615 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
616 // and
617 // (2) in Bytecode_invoke::static_target
618 // It appears to fail when applied to an invokeinterface call site.
619 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
620 // resolve klass
621 if (code == Bytecodes::_invokedynamic) {
622 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
623 Symbol* method_name = vmSymbols::invoke_name();
624 Symbol* method_signature = pool->signature_ref_at(index);
625 Klass* current_klass = pool->pool_holder();
626 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
627 return resolve_method(link_info, code, THREAD);
628 }
629
630 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
631 Klass* resolved_klass = link_info.resolved_klass();
632
633 if (pool->has_preresolution()
634 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
635 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
636 Method* result = ConstantPool::method_at_if_loaded(pool, index);
637 if (result != NULL) {
638 return methodHandle(THREAD, result);
639 }
640 }
641
642 if (code == Bytecodes::_invokeinterface) {
643 return resolve_interface_method(link_info, code, THREAD);
644 } else if (code == Bytecodes::_invokevirtual) {
645 return resolve_method(link_info, code, THREAD);
646 } else if (!resolved_klass->is_interface()) {
647 return resolve_method(link_info, code, THREAD);
648 } else {
649 return resolve_interface_method(link_info, code, THREAD);
650 }
651 }
652
653 // Check and print a loader constraint violation message for method or interface method
654 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
655 const methodHandle& resolved_method,
656 const char* method_type, TRAPS) {
657 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
658 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
659
660 ResourceMark rm(THREAD);
661 Symbol* failed_type_symbol =
662 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
663 resolved_loader, true, CHECK);
664 if (failed_type_symbol != NULL) {
665 Klass* current_class = link_info.current_klass();
666 ClassLoaderData* current_loader_data = current_class->class_loader_data();
667 assert(current_loader_data != NULL, "current class has no class loader data");
668 Klass* resolved_method_class = resolved_method->method_holder();
669 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
670 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
671
672 stringStream ss;
673 ss.print("loader constraint violation: when resolving %s"
674 " \"%s\" the class loader %s of the current class, %s,"
675 " and the class loader %s for the method's defining class, %s, have"
676 " different Class objects for the type %s used in the signature (%s; %s)",
677 method_type,
678 link_info.method_string(),
679 current_loader_data->loader_name_and_id(),
680 current_class->name()->as_C_string(),
681 target_loader_data->loader_name_and_id(),
682 resolved_method_class->name()->as_C_string(),
683 failed_type_symbol->as_C_string(),
684 current_class->class_in_module_of_loader(false, true),
685 resolved_method_class->class_in_module_of_loader(false, true));
686 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
687 }
688 }
689
690 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
691 Klass* current_klass,
692 Klass* sel_klass, TRAPS) {
693 Handle ref_loader(THREAD, current_klass->class_loader());
694 Handle sel_loader(THREAD, sel_klass->class_loader());
695
696 ResourceMark rm(THREAD); // needed for check_signature_loaders
697 Symbol* failed_type_symbol =
698 SystemDictionary::check_signature_loaders(sig,
699 ref_loader, sel_loader,
700 false,
701 CHECK);
702 if (failed_type_symbol != NULL) {
703 stringStream ss;
704 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
705
706 ss.print("loader constraint violation: when resolving field \"%s\" of type %s, "
707 "the class loader %s of the current class, %s, "
708 "and the class loader %s for the field's defining %s, %s, "
709 "have different Class objects for type %s (%s; %s)",
710 field->as_C_string(),
711 failed_type_name,
712 current_klass->class_loader_data()->loader_name_and_id(),
713 current_klass->external_name(),
714 sel_klass->class_loader_data()->loader_name_and_id(),
715 sel_klass->external_kind(),
716 sel_klass->external_name(),
717 failed_type_name,
718 current_klass->class_in_module_of_loader(false, true),
719 sel_klass->class_in_module_of_loader(false, true));
720 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
721 }
722 }
723
724 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
725 Bytecodes::Code code, TRAPS) {
726
727 Handle nested_exception;
728 Klass* resolved_klass = link_info.resolved_klass();
729
730 // 1. For invokevirtual, cannot call an interface method
731 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
732 ResourceMark rm(THREAD);
733 char buf[200];
734 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
735 resolved_klass->external_name());
736 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
737 }
738
739 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
740 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
741 ResourceMark rm(THREAD);
742 char buf[200];
743 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
744 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
745 }
746
747 // 3. lookup method in resolved klass and its super klasses
748 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
749
750 // 4. lookup method in all the interfaces implemented by the resolved klass
751 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
752 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
753
754 if (resolved_method.is_null()) {
755 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
756 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, THREAD);
757 if (HAS_PENDING_EXCEPTION) {
758 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
759 CLEAR_PENDING_EXCEPTION;
760 }
761 }
762 }
763
764 // 5. method lookup failed
765 if (resolved_method.is_null()) {
766 ResourceMark rm(THREAD);
767 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
768 Method::name_and_sig_as_C_string(resolved_klass,
769 link_info.name(),
770 link_info.signature()),
771 nested_exception, NULL);
772 }
773
774 // 6. access checks, access checking may be turned off when calling from within the VM.
775 Klass* current_klass = link_info.current_klass();
776 if (link_info.check_access()) {
777 assert(current_klass != NULL , "current_klass should not be null");
778
779 // check if method can be accessed by the referring class
780 check_method_accessability(current_klass,
781 resolved_klass,
782 resolved_method->method_holder(),
783 resolved_method,
784 CHECK_NULL);
785
786 // check loader constraints
787 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
788 }
789
790 return resolved_method;
791 }
792
793 static void trace_method_resolution(const char* prefix,
794 Klass* klass,
795 Klass* resolved_klass,
796 const methodHandle& method,
797 bool logitables,
798 int index = -1) {
799 #ifndef PRODUCT
800 ResourceMark rm;
801 Log(itables) logi;
802 LogStream lsi(logi.trace());
803 Log(vtables) logv;
804 LogStream lsv(logv.trace());
805 outputStream* st;
806 if (logitables) {
807 st = &lsi;
808 } else {
809 st = &lsv;
810 }
811 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
812 prefix,
813 (klass == NULL ? "<NULL>" : klass->internal_name()),
814 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
815 Method::name_and_sig_as_C_string(resolved_klass,
816 method->name(),
817 method->signature()),
818 method->method_holder()->internal_name());
819 method->print_linkage_flags(st);
820 if (index != -1) {
821 st->print("vtable_index:%d", index);
822 }
823 st->cr();
824 #endif // PRODUCT
825 }
826
827 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
828 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
829
830 Klass* resolved_klass = link_info.resolved_klass();
831
832 // check if klass is interface
833 if (!resolved_klass->is_interface()) {
834 ResourceMark rm(THREAD);
835 char buf[200];
836 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
837 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
838 }
839
840 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
841 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
842 ResourceMark rm(THREAD);
843 char buf[200];
844 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
845 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
846 }
847
848 // lookup method in this interface or its super, java.lang.Object
849 // JDK8: also look for static methods
850 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
851
852 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
853 // lookup method in all the super-interfaces
854 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
855 }
856
857 if (resolved_method.is_null()) {
858 // no method found
859 ResourceMark rm(THREAD);
860 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
861 Method::name_and_sig_as_C_string(resolved_klass,
862 link_info.name(),
863 link_info.signature()));
864 }
865
866 if (link_info.check_access()) {
867 // JDK8 adds non-public interface methods, and accessability check requirement
868 Klass* current_klass = link_info.current_klass();
869
870 assert(current_klass != NULL , "current_klass should not be null");
871
872 // check if method can be accessed by the referring class
873 check_method_accessability(current_klass,
874 resolved_klass,
875 resolved_method->method_holder(),
876 resolved_method,
877 CHECK_NULL);
878
879 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
880 }
881
882 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
883 ResourceMark rm(THREAD);
884 char buf[200];
885 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
886 Method::name_and_sig_as_C_string(resolved_klass,
887 resolved_method->name(), resolved_method->signature()));
888 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
889 }
890
891 if (log_develop_is_enabled(Trace, itables)) {
892 char buf[200];
893 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
894 Bytecodes::name(code));
895 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
896 resolved_method, true);
897 }
898
899 return resolved_method;
900 }
901
902 //------------------------------------------------------------------------------------------------------------------------
903 // Field resolution
904
905 void LinkResolver::check_field_accessability(Klass* ref_klass,
906 Klass* resolved_klass,
907 Klass* sel_klass,
908 const fieldDescriptor& fd,
909 TRAPS) {
910 bool can_access = Reflection::verify_member_access(ref_klass,
911 resolved_klass,
912 sel_klass,
913 fd.access_flags(),
914 true, false, CHECK);
915 // Any existing exceptions that may have been thrown, for example LinkageErrors
916 // from nest-host resolution, have been allowed to propagate.
917 if (!can_access) {
918 bool same_module = (sel_klass->module() == ref_klass->module());
919 ResourceMark rm(THREAD);
920 Exceptions::fthrow(
921 THREAD_AND_LOCATION,
922 vmSymbols::java_lang_IllegalAccessError(),
923 "class %s tried to access %s%sfield %s.%s (%s%s%s)",
924 ref_klass->external_name(),
925 fd.is_protected() ? "protected " : "",
926 fd.is_private() ? "private " : "",
927 sel_klass->external_name(),
928 fd.name()->as_C_string(),
929 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
930 (same_module) ? "" : "; ",
931 (same_module) ? "" : sel_klass->class_in_module_of_loader()
932 );
933 return;
934 }
935 }
936
937 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
938 LinkInfo link_info(pool, index, method, CHECK);
939 resolve_field(fd, link_info, byte, true, CHECK);
940 }
941
942 void LinkResolver::resolve_field(fieldDescriptor& fd,
943 const LinkInfo& link_info,
944 Bytecodes::Code byte, bool initialize_class,
945 TRAPS) {
946 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
947 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
948 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
949 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
950
951 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
952 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
953 // Check if there's a resolved klass containing the field
954 Klass* resolved_klass = link_info.resolved_klass();
955 Symbol* field = link_info.name();
956 Symbol* sig = link_info.signature();
957
958 if (resolved_klass == NULL) {
959 ResourceMark rm(THREAD);
960 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
961 }
962
963 // Resolve instance field
964 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
965 // check if field exists; i.e., if a klass containing the field def has been selected
966 if (sel_klass == NULL) {
967 ResourceMark rm(THREAD);
968 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
969 }
970
971 // Access checking may be turned off when calling from within the VM.
972 Klass* current_klass = link_info.current_klass();
973 if (link_info.check_access()) {
974
975 // check access
976 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
977
978 // check for errors
979 if (is_static != fd.is_static()) {
980 ResourceMark rm(THREAD);
981 char msg[200];
982 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
983 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
984 }
985
986 // A final field can be modified only
987 // (1) by methods declared in the class declaring the field and
988 // (2) by the <clinit> method (in case of a static field)
989 // or by the <init> method (in case of an instance field).
990 if (is_put && fd.access_flags().is_final()) {
991 ResourceMark rm(THREAD);
992 stringStream ss;
993
994 if (sel_klass != current_klass) {
995 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
996 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
997 current_klass->external_name());
998 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
999 }
1000
1001 if (fd.constants()->pool_holder()->major_version() >= 53) {
1002 methodHandle m = link_info.current_method();
1003 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
1004 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1005 fd.is_static() &&
1006 !m()->is_static_initializer());
1007 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1008 !fd.is_static() &&
1009 !m->is_object_initializer());
1010
1011 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1012 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1013 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1014 m()->name()->as_C_string(),
1015 is_static ? "<clinit>" : "<init>");
1016 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1017 }
1018 }
1019 }
1020
1021 // initialize resolved_klass if necessary
1022 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1023 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1024 //
1025 // note 2: we don't want to force initialization if we are just checking
1026 // if the field access is legal; e.g., during compilation
1027 if (is_static && initialize_class) {
1028 sel_klass->initialize(CHECK);
1029 }
1030 }
1031
1032 if ((sel_klass != current_klass) && (current_klass != NULL)) {
1033 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1034 }
1035
1036 // return information. note that the klass is set to the actual klass containing the
1037 // field, otherwise access of static fields in superclasses will not work.
1038 }
1039
1040
1041 //------------------------------------------------------------------------------------------------------------------------
1042 // Invoke resolution
1043 //
1044 // Naming conventions:
1045 //
1046 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1047 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1048 // resolved_klass the specified klass (i.e., specified via constant pool index)
1049 // recv_klass the receiver klass
1050
1051
1052 void LinkResolver::resolve_static_call(CallInfo& result,
1053 const LinkInfo& link_info,
1054 bool initialize_class, TRAPS) {
1055 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1056
1057 // The resolved class can change as a result of this resolution.
1058 Klass* resolved_klass = resolved_method->method_holder();
1059
1060 // Initialize klass (this should only happen if everything is ok)
1061 if (initialize_class && resolved_klass->should_be_initialized()) {
1062 resolved_klass->initialize(CHECK);
1063 // Use updated LinkInfo to reresolve with resolved method holder
1064 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1065 link_info.current_klass(),
1066 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1067 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1068 }
1069
1070 // setup result
1071 result.set_static(resolved_klass, resolved_method, CHECK);
1072 }
1073
1074 // throws linktime exceptions
1075 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1076
1077 Klass* resolved_klass = link_info.resolved_klass();
1078 methodHandle resolved_method;
1079 if (!resolved_klass->is_interface()) {
1080 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1081 } else {
1082 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1083 }
1084 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1085
1086 // check if static
1087 if (!resolved_method->is_static()) {
1088 ResourceMark rm(THREAD);
1089 char buf[200];
1090 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1091 resolved_method->name(),
1092 resolved_method->signature()));
1093 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1094 }
1095 return resolved_method;
1096 }
1097
1098
1099 void LinkResolver::resolve_special_call(CallInfo& result,
1100 Handle recv,
1101 const LinkInfo& link_info,
1102 TRAPS) {
1103 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1104 runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
1105 }
1106
1107 // throws linktime exceptions
1108 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1109 TRAPS) {
1110
1111 // Invokespecial is called for multiple special reasons:
1112 // <init>
1113 // local private method invocation, for classes and interfaces
1114 // superclass.method, which can also resolve to a default method
1115 // and the selected method is recalculated relative to the direct superclass
1116 // superinterface.method, which explicitly does not check shadowing
1117 Klass* resolved_klass = link_info.resolved_klass();
1118 methodHandle resolved_method;
1119
1120 if (!resolved_klass->is_interface()) {
1121 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1122 } else {
1123 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1124 }
1125
1126 // check if method name is <init>, that it is found in same klass as static type
1127 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1128 resolved_method->method_holder() != resolved_klass) {
1129 ResourceMark rm(THREAD);
1130 Exceptions::fthrow(
1131 THREAD_AND_LOCATION,
1132 vmSymbols::java_lang_NoSuchMethodError(),
1133 "%s: method %s%s not found",
1134 resolved_klass->external_name(),
1135 resolved_method->name()->as_C_string(),
1136 resolved_method->signature()->as_C_string()
1137 );
1138 return NULL;
1139 }
1140
1141 // ensure that invokespecial's interface method reference is in
1142 // a direct superinterface, not an indirect superinterface
1143 Klass* current_klass = link_info.current_klass();
1144 if (current_klass != NULL && resolved_klass->is_interface()) {
1145 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1146 InstanceKlass *klass_to_check = !ck->is_unsafe_anonymous() ?
1147 ck :
1148 ck->unsafe_anonymous_host();
1149 // Disable verification for the dynamically-generated reflection bytecodes.
1150 bool is_reflect = klass_to_check->is_subclass_of(
1151 SystemDictionary::reflect_MagicAccessorImpl_klass());
1152
1153 if (!is_reflect &&
1154 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1155 ResourceMark rm(THREAD);
1156 char buf[200];
1157 jio_snprintf(buf, sizeof(buf),
1158 "Interface method reference: %s, is in an indirect superinterface of %s",
1159 Method::name_and_sig_as_C_string(resolved_klass,
1160 resolved_method->name(),
1161 resolved_method->signature()),
1162 current_klass->external_name());
1163 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1164 }
1165 }
1166
1167 // check if not static
1168 if (resolved_method->is_static()) {
1169 ResourceMark rm(THREAD);
1170 char buf[200];
1171 jio_snprintf(buf, sizeof(buf),
1172 "Expecting non-static method %s",
1173 Method::name_and_sig_as_C_string(resolved_klass,
1174 resolved_method->name(),
1175 resolved_method->signature()));
1176 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1177 }
1178
1179 if (log_develop_is_enabled(Trace, itables)) {
1180 trace_method_resolution("invokespecial resolved method: caller-class:",
1181 current_klass, resolved_klass, resolved_method, true);
1182 }
1183
1184 return resolved_method;
1185 }
1186
1187 // throws runtime exceptions
1188 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1189 const LinkInfo& link_info,
1190 const methodHandle& resolved_method,
1191 Handle recv, TRAPS) {
1192
1193 Klass* resolved_klass = link_info.resolved_klass();
1194
1195 // resolved method is selected method unless we have an old-style lookup
1196 // for a superclass method
1197 // Invokespecial for a superinterface, resolved method is selected method,
1198 // no checks for shadowing
1199 methodHandle sel_method(THREAD, resolved_method());
1200
1201 if (link_info.check_access() &&
1202 // check if the method is not <init>
1203 resolved_method->name() != vmSymbols::object_initializer_name()) {
1204
1205 Klass* current_klass = link_info.current_klass();
1206
1207 // Check if the class of the resolved_klass is a superclass
1208 // (not supertype in order to exclude interface classes) of the current class.
1209 // This check is not performed for super.invoke for interface methods
1210 // in super interfaces.
1211 if (current_klass->is_subclass_of(resolved_klass) &&
1212 current_klass != resolved_klass) {
1213 // Lookup super method
1214 Klass* super_klass = current_klass->super();
1215 sel_method = lookup_instance_method_in_klasses(super_klass,
1216 resolved_method->name(),
1217 resolved_method->signature(),
1218 Klass::find_private, CHECK);
1219 // check if found
1220 if (sel_method.is_null()) {
1221 ResourceMark rm(THREAD);
1222 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1223 Method::name_and_sig_as_C_string(resolved_klass,
1224 resolved_method->name(),
1225 resolved_method->signature()));
1226 // check loader constraints if found a different method
1227 } else if (sel_method() != resolved_method()) {
1228 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1229 }
1230 }
1231
1232 // Check that the class of objectref (the receiver) is the current class or interface,
1233 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1234 // throws IllegalAccessError.
1235 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1236 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1237 // a class. If the sender is an interface, the check has to be performed at runtime.
1238 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1239 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1240 if (sender->is_interface() && recv.not_null()) {
1241 Klass* receiver_klass = recv->klass();
1242 if (!receiver_klass->is_subtype_of(sender)) {
1243 ResourceMark rm(THREAD);
1244 char buf[500];
1245 jio_snprintf(buf, sizeof(buf),
1246 "Receiver class %s must be the current class or a subtype of interface %s",
1247 receiver_klass->name()->as_C_string(),
1248 sender->name()->as_C_string());
1249 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1250 }
1251 }
1252 }
1253
1254 // check if not static
1255 if (sel_method->is_static()) {
1256 ResourceMark rm(THREAD);
1257 char buf[200];
1258 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1259 resolved_method->name(),
1260 resolved_method->signature()));
1261 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1262 }
1263
1264 // check if abstract
1265 if (sel_method->is_abstract()) {
1266 ResourceMark rm(THREAD);
1267 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1268 Method::name_and_sig_as_C_string(resolved_klass,
1269 sel_method->name(),
1270 sel_method->signature()));
1271 }
1272
1273 if (log_develop_is_enabled(Trace, itables)) {
1274 trace_method_resolution("invokespecial selected method: resolved-class:",
1275 resolved_klass, resolved_klass, sel_method, true);
1276 }
1277
1278 // setup result
1279 result.set_static(resolved_klass, sel_method, CHECK);
1280 }
1281
1282 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1283 const LinkInfo& link_info,
1284 bool check_null_and_abstract, TRAPS) {
1285 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1286 runtime_resolve_virtual_method(result, resolved_method,
1287 link_info.resolved_klass(),
1288 recv, receiver_klass,
1289 check_null_and_abstract, CHECK);
1290 }
1291
1292 // throws linktime exceptions
1293 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1294 TRAPS) {
1295 // normal method resolution
1296 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1297
1298 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1299 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1300
1301 // check if private interface method
1302 Klass* resolved_klass = link_info.resolved_klass();
1303 Klass* current_klass = link_info.current_klass();
1304
1305 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1306 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1307 ResourceMark rm(THREAD);
1308 char buf[200];
1309 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1310 Method::name_and_sig_as_C_string(resolved_klass,
1311 resolved_method->name(),
1312 resolved_method->signature()),
1313 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1314 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1315 }
1316
1317 // check if not static
1318 if (resolved_method->is_static()) {
1319 ResourceMark rm(THREAD);
1320 char buf[200];
1321 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1322 resolved_method->name(),
1323 resolved_method->signature()));
1324 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1325 }
1326
1327 if (log_develop_is_enabled(Trace, vtables)) {
1328 trace_method_resolution("invokevirtual resolved method: caller-class:",
1329 current_klass, resolved_klass, resolved_method, false);
1330 }
1331
1332 return resolved_method;
1333 }
1334
1335 // throws runtime exceptions
1336 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1337 const methodHandle& resolved_method,
1338 Klass* resolved_klass,
1339 Handle recv,
1340 Klass* recv_klass,
1341 bool check_null_and_abstract,
1342 TRAPS) {
1343
1344 // setup default return values
1345 int vtable_index = Method::invalid_vtable_index;
1346 methodHandle selected_method;
1347
1348 // runtime method resolution
1349 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1350 THROW(vmSymbols::java_lang_NullPointerException());
1351 }
1352
1353 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1354 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1355 // a missing receiver might result in a bogus lookup.
1356 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1357
1358 // do lookup based on receiver klass using the vtable index
1359 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1360 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1361 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1362
1363 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1364 } else {
1365 // at this point we are sure that resolved_method is virtual and not
1366 // a default or miranda method; therefore, it must have a valid vtable index.
1367 assert(!resolved_method->has_itable_index(), "");
1368 vtable_index = resolved_method->vtable_index();
1369 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1370 // methods, or for final methods. Private methods never appear in the vtable
1371 // and never override other methods. As an optimization, final methods are
1372 // never put in the vtable, unless they override an existing method.
1373 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1374 // resolved method, and it can never be changed by an override.
1375 if (vtable_index == Method::nonvirtual_vtable_index) {
1376 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1377 selected_method = resolved_method;
1378 } else {
1379 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1380 }
1381 }
1382
1383 // check if method exists
1384 if (selected_method.is_null()) {
1385 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1386 }
1387
1388 // check if abstract
1389 if (check_null_and_abstract && selected_method->is_abstract()) {
1390 // Pass arguments for generating a verbose error message.
1391 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1392 }
1393
1394 if (log_develop_is_enabled(Trace, vtables)) {
1395 trace_method_resolution("invokevirtual selected method: receiver-class:",
1396 recv_klass, resolved_klass, selected_method,
1397 false, vtable_index);
1398 }
1399 // setup result
1400 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1401 }
1402
1403 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1404 const LinkInfo& link_info,
1405 bool check_null_and_abstract, TRAPS) {
1406 // throws linktime exceptions
1407 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1408 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1409 recv, recv_klass, check_null_and_abstract, CHECK);
1410 }
1411
1412 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1413 TRAPS) {
1414 // normal interface method resolution
1415 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1416 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1417 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1418
1419 return resolved_method;
1420 }
1421
1422 // throws runtime exceptions
1423 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1424 const methodHandle& resolved_method,
1425 Klass* resolved_klass,
1426 Handle recv,
1427 Klass* recv_klass,
1428 bool check_null_and_abstract, TRAPS) {
1429
1430 // check if receiver exists
1431 if (check_null_and_abstract && recv.is_null()) {
1432 THROW(vmSymbols::java_lang_NullPointerException());
1433 }
1434
1435 // check if receiver klass implements the resolved interface
1436 if (!recv_klass->is_subtype_of(resolved_klass)) {
1437 ResourceMark rm(THREAD);
1438 char buf[200];
1439 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1440 recv_klass->external_name(),
1441 resolved_klass->external_name());
1442 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1443 }
1444
1445 methodHandle selected_method = resolved_method;
1446
1447 // resolve the method in the receiver class, unless it is private
1448 if (!resolved_method()->is_private()) {
1449 // do lookup based on receiver klass
1450 // This search must match the linktime preparation search for itable initialization
1451 // to correctly enforce loader constraints for interface method inheritance.
1452 // Private methods are skipped as the resolved method was not private.
1453 selected_method = lookup_instance_method_in_klasses(recv_klass,
1454 resolved_method->name(),
1455 resolved_method->signature(),
1456 Klass::skip_private, CHECK);
1457
1458 if (selected_method.is_null() && !check_null_and_abstract) {
1459 // In theory this is a harmless placeholder value, but
1460 // in practice leaving in null affects the nsk default method tests.
1461 // This needs further study.
1462 selected_method = resolved_method;
1463 }
1464 // check if method exists
1465 if (selected_method.is_null()) {
1466 // Pass arguments for generating a verbose error message.
1467 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1468 }
1469 // check access
1470 // Throw Illegal Access Error if selected_method is not public.
1471 if (!selected_method->is_public()) {
1472 ResourceMark rm(THREAD);
1473 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1474 Method::name_and_sig_as_C_string(recv_klass,
1475 selected_method->name(),
1476 selected_method->signature()));
1477 }
1478 // check if abstract
1479 if (check_null_and_abstract && selected_method->is_abstract()) {
1480 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1481 }
1482 }
1483
1484 if (log_develop_is_enabled(Trace, itables)) {
1485 trace_method_resolution("invokeinterface selected method: receiver-class:",
1486 recv_klass, resolved_klass, selected_method, true);
1487 }
1488 // setup result
1489 if (resolved_method->has_vtable_index()) {
1490 int vtable_index = resolved_method->vtable_index();
1491 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1492 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1493 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1494 } else if (resolved_method->has_itable_index()) {
1495 int itable_index = resolved_method()->itable_index();
1496 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1497 result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
1498 } else {
1499 int index = resolved_method->vtable_index();
1500 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1501 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1502 assert(resolved_method()->is_private() ||
1503 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1504 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1505 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1506 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1507 result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, index, CHECK);
1508 }
1509 }
1510
1511
1512 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1513 const LinkInfo& link_info) {
1514 EXCEPTION_MARK;
1515 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1516 if (HAS_PENDING_EXCEPTION) {
1517 CLEAR_PENDING_EXCEPTION;
1518 return methodHandle();
1519 } else {
1520 return method_result;
1521 }
1522 }
1523
1524 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1525 const LinkInfo& link_info) {
1526 EXCEPTION_MARK;
1527 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1528 if (HAS_PENDING_EXCEPTION) {
1529 CLEAR_PENDING_EXCEPTION;
1530 return methodHandle();
1531 } else {
1532 return method_result;
1533 }
1534 }
1535
1536 methodHandle LinkResolver::resolve_virtual_call_or_null(
1537 Klass* receiver_klass,
1538 const LinkInfo& link_info) {
1539 EXCEPTION_MARK;
1540 CallInfo info;
1541 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1542 if (HAS_PENDING_EXCEPTION) {
1543 CLEAR_PENDING_EXCEPTION;
1544 return methodHandle();
1545 }
1546 return info.selected_method();
1547 }
1548
1549 methodHandle LinkResolver::resolve_interface_call_or_null(
1550 Klass* receiver_klass,
1551 const LinkInfo& link_info) {
1552 EXCEPTION_MARK;
1553 CallInfo info;
1554 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1555 if (HAS_PENDING_EXCEPTION) {
1556 CLEAR_PENDING_EXCEPTION;
1557 return methodHandle();
1558 }
1559 return info.selected_method();
1560 }
1561
1562 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1563 const LinkInfo& link_info) {
1564 EXCEPTION_MARK;
1565 CallInfo info;
1566 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1567 /*check_null_or_abstract*/false, THREAD);
1568 if (HAS_PENDING_EXCEPTION) {
1569 CLEAR_PENDING_EXCEPTION;
1570 return Method::invalid_vtable_index;
1571 }
1572 return info.vtable_index();
1573 }
1574
1575 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1576 EXCEPTION_MARK;
1577 CallInfo info;
1578 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1579 if (HAS_PENDING_EXCEPTION) {
1580 CLEAR_PENDING_EXCEPTION;
1581 return methodHandle();
1582 }
1583 return info.selected_method();
1584 }
1585
1586 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1587 EXCEPTION_MARK;
1588 CallInfo info;
1589 resolve_special_call(info, Handle(), link_info, THREAD);
1590 if (HAS_PENDING_EXCEPTION) {
1591 CLEAR_PENDING_EXCEPTION;
1592 return methodHandle();
1593 }
1594 return info.selected_method();
1595 }
1596
1597
1598
1599 //------------------------------------------------------------------------------------------------------------------------
1600 // ConstantPool entries
1601
1602 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1603 switch (byte) {
1604 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1605 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1606 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1607 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1608 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1609 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1610 default : break;
1611 }
1612 return;
1613 }
1614
1615 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1616 const methodHandle& attached_method,
1617 Bytecodes::Code byte, TRAPS) {
1618 Klass* defc = attached_method->method_holder();
1619 Symbol* name = attached_method->name();
1620 Symbol* type = attached_method->signature();
1621 LinkInfo link_info(defc, name, type);
1622 switch(byte) {
1623 case Bytecodes::_invokevirtual:
1624 resolve_virtual_call(result, recv, recv->klass(), link_info,
1625 /*check_null_and_abstract=*/true, CHECK);
1626 break;
1627 case Bytecodes::_invokeinterface:
1628 resolve_interface_call(result, recv, recv->klass(), link_info,
1629 /*check_null_and_abstract=*/true, CHECK);
1630 break;
1631 case Bytecodes::_invokestatic:
1632 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1633 break;
1634 case Bytecodes::_invokespecial:
1635 resolve_special_call(result, recv, link_info, CHECK);
1636 break;
1637 default:
1638 fatal("bad call: %s", Bytecodes::name(byte));
1639 break;
1640 }
1641 }
1642
1643 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1644 LinkInfo link_info(pool, index, CHECK);
1645 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1646 }
1647
1648
1649 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1650 const constantPoolHandle& pool, int index, TRAPS) {
1651 LinkInfo link_info(pool, index, CHECK);
1652 resolve_special_call(result, recv, link_info, CHECK);
1653 }
1654
1655
1656 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1657 const constantPoolHandle& pool, int index,
1658 TRAPS) {
1659
1660 LinkInfo link_info(pool, index, CHECK);
1661 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1662 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1663 }
1664
1665
1666 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1667 LinkInfo link_info(pool, index, CHECK);
1668 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1669 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1670 }
1671
1672
1673 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1674 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1675 LinkInfo link_info(pool, index, CHECK);
1676 if (TraceMethodHandles) {
1677 ResourceMark rm(THREAD);
1678 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1679 link_info.signature()->as_C_string());
1680 }
1681 resolve_handle_call(result, link_info, CHECK);
1682 }
1683
1684 void LinkResolver::resolve_handle_call(CallInfo& result,
1685 const LinkInfo& link_info,
1686 TRAPS) {
1687 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1688 Klass* resolved_klass = link_info.resolved_klass();
1689 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1690 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1691 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1692 Handle resolved_appendix;
1693 methodHandle resolved_method = lookup_polymorphic_method(link_info, &resolved_appendix, CHECK);
1694 result.set_handle(resolved_klass, resolved_method, resolved_appendix, CHECK);
1695 }
1696
1697 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1698 Symbol* method_name = pool->name_ref_at(index);
1699 Symbol* method_signature = pool->signature_ref_at(index);
1700 Klass* current_klass = pool->pool_holder();
1701
1702 // Resolve the bootstrap specifier (BSM + optional arguments).
1703 Handle bootstrap_specifier;
1704 // Check if CallSite has been bound already:
1705 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1706 int pool_index = cpce->constant_pool_index();
1707
1708 if (cpce->is_f1_null()) {
1709 if (cpce->indy_resolution_failed()) {
1710 ConstantPool::throw_resolution_error(pool,
1711 ResolutionErrorTable::encode_cpcache_index(index),
1712 CHECK);
1713 }
1714
1715 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1716 // reference to a method handle which will be the bootstrap method for a dynamic
1717 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1718 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1719 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1720 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1721 // this bootstrap method will encounter the resolution of MethodHandleInError.
1722 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1723 Exceptions::wrap_dynamic_exception(CHECK);
1724 assert(bsm_info != NULL, "");
1725 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1726 bootstrap_specifier = Handle(THREAD, bsm_info);
1727 }
1728 if (!cpce->is_f1_null()) {
1729 methodHandle method( THREAD, cpce->f1_as_method());
1730 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1731 result.set_handle(method, appendix, 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 result.set_handle(method, appendix, THREAD);
1760 Exceptions::wrap_dynamic_exception(CHECK);
1761 } else {
1762 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
1763 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
1764 }
1765 return;
1766 }
1767 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
1768 }
1769 }
1770
1771 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1772 int pool_index,
1773 Handle bootstrap_specifier,
1774 Symbol* method_name, Symbol* method_signature,
1775 Klass* current_klass,
1776 TRAPS) {
1777 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1778 // The appendix argument is likely to be a freshly-created CallSite.
1779 Handle resolved_appendix;
1780 methodHandle resolved_method =
1781 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1782 pool_index,
1783 bootstrap_specifier,
1784 method_name, method_signature,
1785 &resolved_appendix,
1786 THREAD);
1787 Exceptions::wrap_dynamic_exception(CHECK);
1788 result.set_handle(resolved_method, resolved_appendix, THREAD);
1789 Exceptions::wrap_dynamic_exception(CHECK);
1790 }
1791
1792 // Selected method is abstract.
1793 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1794 const methodHandle& selected_method,
1795 Klass *recv_klass, TRAPS) {
1796 Klass *resolved_klass = resolved_method->method_holder();
1797 ResourceMark rm(THREAD);
1798 stringStream ss;
1799
1800 if (recv_klass != NULL) {
1801 ss.print("Receiver class %s does not define or inherit an "
1802 "implementation of the",
1803 recv_klass->external_name());
1804 } else {
1805 ss.print("Missing implementation of");
1806 }
1807
1808 assert(resolved_method.not_null(), "Sanity");
1809 ss.print(" resolved method %s%s%s%s of %s %s.",
1810 resolved_method->is_abstract() ? "abstract " : "",
1811 resolved_method->is_private() ? "private " : "",
1812 resolved_method->name()->as_C_string(),
1813 resolved_method->signature()->as_C_string(),
1814 resolved_klass->external_kind(),
1815 resolved_klass->external_name());
1816
1817 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1818 ss.print(" Selected method is %s%s%s.",
1819 selected_method->is_abstract() ? "abstract " : "",
1820 selected_method->is_private() ? "private " : "",
1821 selected_method->name_and_sig_as_C_string());
1822 }
1823
1824 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1825 }