1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/defaultMethods.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/resolutionErrors.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "gc/shared/collectedHeap.inline.hpp"
35 #include "interpreter/bytecode.hpp"
36 #include "interpreter/interpreterRuntime.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.hpp"
42 #include "oops/cpCache.inline.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/method.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "prims/methodHandles.hpp"
49 #include "prims/nativeLookup.hpp"
50 #include "runtime/compilationPolicy.hpp"
51 #include "runtime/fieldDescriptor.hpp"
52 #include "runtime/frame.inline.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/reflection.hpp"
55 #include "runtime/safepointVerifiers.hpp"
56 #include "runtime/signature.hpp"
57 #include "runtime/thread.inline.hpp"
58 #include "runtime/vmThread.hpp"
59
60 //------------------------------------------------------------------------------------------------------------------------
61 // Implementation of CallInfo
62
63
64 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
65 int vtable_index = Method::nonvirtual_vtable_index;
66 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
67 }
68
69
70 void CallInfo::set_interface(Klass* resolved_klass,
71 Klass* selected_klass,
72 const methodHandle& resolved_method,
73 const methodHandle& selected_method,
74 int itable_index, TRAPS) {
75 // This is only called for interface methods. If the resolved_method
76 // comes from java/lang/Object, it can be the subject of a virtual call, so
77 // we should pick the vtable index from the resolved method.
78 // In that case, the caller must call set_virtual instead of set_interface.
79 assert(resolved_method->method_holder()->is_interface(), "");
80 assert(itable_index == resolved_method()->itable_index(), "");
81 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
82 }
83
84 void CallInfo::set_virtual(Klass* resolved_klass,
85 Klass* selected_klass,
86 const methodHandle& resolved_method,
87 const methodHandle& selected_method,
88 int vtable_index, TRAPS) {
89 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
90 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
91 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
92 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
93 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
94 }
95
96 void CallInfo::set_handle(const methodHandle& resolved_method,
97 Handle resolved_appendix,
98 Handle resolved_method_type, TRAPS) {
99 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
100 }
101
102 void CallInfo::set_handle(Klass* resolved_klass,
103 const methodHandle& resolved_method,
104 Handle resolved_appendix,
105 Handle resolved_method_type, TRAPS) {
106 if (resolved_method.is_null()) {
107 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
108 }
109 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
110 resolved_method->is_compiled_lambda_form(),
111 "linkMethod must return one of these");
112 int vtable_index = Method::nonvirtual_vtable_index;
113 assert(!resolved_method->has_vtable_index(), "");
114 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
115 _resolved_appendix = resolved_appendix;
116 _resolved_method_type = resolved_method_type;
117 }
118
119 void CallInfo::set_common(Klass* resolved_klass,
120 Klass* selected_klass,
121 const methodHandle& resolved_method,
122 const methodHandle& selected_method,
123 CallKind kind,
124 int index,
125 TRAPS) {
126 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
127 _resolved_klass = resolved_klass;
128 _selected_klass = selected_klass;
129 _resolved_method = resolved_method;
130 _selected_method = selected_method;
131 _call_kind = kind;
132 _call_index = index;
133 _resolved_appendix = Handle();
134 DEBUG_ONLY(verify()); // verify before making side effects
135
136 CompilationPolicy::compile_if_required(selected_method, THREAD);
137 }
138
139 // utility query for unreflecting a method
140 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
141 Klass* resolved_method_holder = resolved_method->method_holder();
142 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
143 resolved_klass = resolved_method_holder;
144 }
145 _resolved_klass = resolved_klass;
146 _selected_klass = resolved_klass;
147 _resolved_method = resolved_method;
148 _selected_method = resolved_method;
149 // classify:
150 CallKind kind = CallInfo::unknown_kind;
151 int index = resolved_method->vtable_index();
152 if (resolved_method->can_be_statically_bound()) {
153 kind = CallInfo::direct_call;
154 } else if (!resolved_method_holder->is_interface()) {
155 // Could be an Object method inherited into an interface, but still a vtable call.
156 kind = CallInfo::vtable_call;
157 } else if (!resolved_klass->is_interface()) {
158 // A default or miranda method. Compute the vtable index.
159 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
160 resolved_method);
161 assert(index >= 0 , "we should have valid vtable index at this point");
162
163 kind = CallInfo::vtable_call;
164 } else if (resolved_method->has_vtable_index()) {
165 // Can occur if an interface redeclares a method of Object.
166
167 #ifdef ASSERT
168 // Ensure that this is really the case.
169 Klass* object_klass = SystemDictionary::Object_klass();
170 Method * object_resolved_method = object_klass->vtable().method_at(index);
171 assert(object_resolved_method->name() == resolved_method->name(),
172 "Object and interface method names should match at vtable index %d, %s != %s",
173 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
174 assert(object_resolved_method->signature() == resolved_method->signature(),
175 "Object and interface method signatures should match at vtable index %d, %s != %s",
176 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
177 #endif // ASSERT
178
179 kind = CallInfo::vtable_call;
180 } else {
181 // A regular interface call.
182 kind = CallInfo::itable_call;
183 index = resolved_method->itable_index();
184 }
185 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
186 _call_kind = kind;
187 _call_index = index;
188 _resolved_appendix = Handle();
189 // Find or create a ResolvedMethod instance for this Method*
190 set_resolved_method_name(CHECK);
191
192 DEBUG_ONLY(verify());
193 }
194
195 void CallInfo::set_resolved_method_name(TRAPS) {
196 Method* m = _resolved_method();
197 assert(m != NULL, "Should already have a Method*");
198 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
199 _resolved_method_name = Handle(THREAD, rmethod_name);
200 }
201
202 #ifdef ASSERT
203 void CallInfo::verify() {
204 switch (call_kind()) { // the meaning and allowed value of index depends on kind
205 case CallInfo::direct_call:
206 if (_call_index == Method::nonvirtual_vtable_index) break;
207 // else fall through to check vtable index:
208 case CallInfo::vtable_call:
209 assert(resolved_klass()->verify_vtable_index(_call_index), "");
210 break;
211 case CallInfo::itable_call:
212 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
213 break;
214 case CallInfo::unknown_kind:
215 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
216 break;
217 default:
218 fatal("Unexpected call kind %d", call_kind());
219 }
220 }
221 #endif // ASSERT
222
223 #ifndef PRODUCT
224 void CallInfo::print() {
225 ResourceMark rm;
226 const char* kindstr;
227 switch (_call_kind) {
228 case direct_call: kindstr = "direct"; break;
229 case vtable_call: kindstr = "vtable"; break;
230 case itable_call: kindstr = "itable"; break;
231 default : kindstr = "unknown"; break;
232 }
233 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
234 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
235 }
236 #endif
237
238 //------------------------------------------------------------------------------------------------------------------------
239 // Implementation of LinkInfo
240
241 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
242 // resolve klass
243 _resolved_klass = pool->klass_ref_at(index, CHECK);
244
245 // Get name, signature, and static klass
246 _name = pool->name_ref_at(index);
247 _signature = pool->signature_ref_at(index);
248 _tag = pool->tag_ref_at(index);
249 _current_klass = pool->pool_holder();
250 _current_method = current_method;
251
252 // Coming from the constant pool always checks access
253 _check_access = true;
254 }
255
256 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
257 // resolve klass
258 _resolved_klass = pool->klass_ref_at(index, CHECK);
259
260 // Get name, signature, and static klass
261 _name = pool->name_ref_at(index);
262 _signature = pool->signature_ref_at(index);
263 _tag = pool->tag_ref_at(index);
264 _current_klass = pool->pool_holder();
265 _current_method = methodHandle();
266
267 // Coming from the constant pool always checks access
268 _check_access = true;
269 }
270
271 char* LinkInfo::method_string() const {
272 return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature);
273 }
274
275 #ifndef PRODUCT
276 void LinkInfo::print() {
277 ResourceMark rm;
278 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
279 _resolved_klass->name()->as_C_string(),
280 _name->as_C_string(),
281 _signature->as_C_string(),
282 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
283 _check_access ? "true" : "false");
284 }
285 #endif // PRODUCT
286 //------------------------------------------------------------------------------------------------------------------------
287 // Klass resolution
288
289 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
290 bool fold_type_to_class, TRAPS) {
291 Klass* base_klass = sel_klass;
292 if (fold_type_to_class) {
293 if (sel_klass->is_objArray_klass()) {
294 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
295 }
296 // The element type could be a typeArray - we only need the access
297 // check if it is a reference to another class.
298 if (!base_klass->is_instance_klass()) {
299 return; // no relevant check to do
300 }
301 }
302 Reflection::VerifyClassAccessResults vca_result =
303 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
304 if (vca_result != Reflection::ACCESS_OK) {
305 ResourceMark rm(THREAD);
306 char* msg = Reflection::verify_class_access_msg(ref_klass,
307 InstanceKlass::cast(base_klass),
308 vca_result);
309 bool same_module = (base_klass->module() == ref_klass->module());
310 if (msg == NULL) {
311 Exceptions::fthrow(
312 THREAD_AND_LOCATION,
313 vmSymbols::java_lang_IllegalAccessError(),
314 "failed to access class %s from class %s (%s%s%s)",
315 base_klass->external_name(),
316 ref_klass->external_name(),
317 (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(),
318 (same_module) ? "" : "; ",
319 (same_module) ? "" : ref_klass->class_in_module_of_loader());
320 } else {
321 // Use module specific message returned by verify_class_access_msg().
322 Exceptions::fthrow(
323 THREAD_AND_LOCATION,
324 vmSymbols::java_lang_IllegalAccessError(),
325 "%s", msg);
326 }
327 }
328 }
329
330 //------------------------------------------------------------------------------------------------------------------------
331 // Method resolution
332 //
333 // According to JVM spec. $5.4.3c & $5.4.3d
334
335 // Look up method in klasses, including static methods
336 // Then look up local default methods
337 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
338 bool checkpolymorphism,
339 bool in_imethod_resolve) {
340 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
341
342 Klass* klass = link_info.resolved_klass();
343 Symbol* name = link_info.name();
344 Symbol* signature = link_info.signature();
345
346 // Ignore overpasses so statics can be found during resolution
347 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
348
349 if (klass->is_array_klass()) {
350 // Only consider klass and super klass for arrays
351 return result;
352 }
353
354 InstanceKlass* ik = InstanceKlass::cast(klass);
355
356 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
357 // ignore static and non-public methods of java.lang.Object,
358 // like clone, finalize, registerNatives.
359 if (in_imethod_resolve &&
360 result != NULL &&
361 ik->is_interface() &&
362 (result->is_static() || !result->is_public()) &&
363 result->method_holder() == SystemDictionary::Object_klass()) {
364 result = NULL;
365 }
366
367 // Before considering default methods, check for an overpass in the
368 // current class if a method has not been found.
369 if (result == NULL) {
370 result = ik->find_method(name, signature);
371 }
372
373 if (result == NULL) {
374 Array<Method*>* default_methods = ik->default_methods();
375 if (default_methods != NULL) {
376 result = InstanceKlass::find_method(default_methods, name, signature);
377 }
378 }
379
380 if (checkpolymorphism && result != NULL) {
381 vmIntrinsics::ID iid = result->intrinsic_id();
382 if (MethodHandles::is_signature_polymorphic(iid)) {
383 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
384 return NULL;
385 }
386 }
387 return result;
388 }
389
390 // returns first instance method
391 // Looks up method in classes, then looks up local default methods
392 methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
393 Symbol* name,
394 Symbol* signature,
395 Klass::PrivateLookupMode private_mode, TRAPS) {
396 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
397
398 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
399 Klass* super_klass = result->method_holder()->super();
400 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
401 }
402
403 if (klass->is_array_klass()) {
404 // Only consider klass and super klass for arrays
405 return methodHandle(THREAD, result);
406 }
407
408 if (result == NULL) {
409 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
410 if (default_methods != NULL) {
411 result = InstanceKlass::find_method(default_methods, name, signature);
412 assert(result == NULL || !result->is_static(), "static defaults not allowed");
413 }
414 }
415 return methodHandle(THREAD, result);
416 }
417
418 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
419 const methodHandle& resolved_method) {
420
421 int vtable_index = Method::invalid_vtable_index;
422 Symbol* name = resolved_method->name();
423 Symbol* signature = resolved_method->signature();
424 InstanceKlass* ik = InstanceKlass::cast(klass);
425
426 // First check in default method array
427 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
428 int index = InstanceKlass::find_method_index(ik->default_methods(),
429 name, signature, Klass::find_overpass,
430 Klass::find_static, Klass::find_private);
431 if (index >= 0 ) {
432 vtable_index = ik->default_vtable_indices()->at(index);
433 }
434 }
435 if (vtable_index == Method::invalid_vtable_index) {
436 // get vtable_index for miranda methods
437 klassVtable vt = ik->vtable();
438 vtable_index = vt.index_of_miranda(name, signature);
439 }
440 return vtable_index;
441 }
442
443 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
444 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
445
446 // Specify 'true' in order to skip default methods when searching the
447 // interfaces. Function lookup_method_in_klasses() already looked for
448 // the method in the default methods table.
449 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
450 }
451
452 methodHandle LinkResolver::lookup_polymorphic_method(
453 const LinkInfo& link_info,
454 Handle *appendix_result_or_null,
455 Handle *method_type_result,
456 TRAPS) {
457 Klass* klass = link_info.resolved_klass();
458 Symbol* name = link_info.name();
459 Symbol* full_signature = link_info.signature();
460
461 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
462 if (TraceMethodHandles) {
463 ResourceMark rm(THREAD);
464 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
465 vmIntrinsics::name_at(iid), klass->external_name(),
466 name->as_C_string(), full_signature->as_C_string());
467 }
468 if ((klass == SystemDictionary::MethodHandle_klass() ||
469 klass == SystemDictionary::VarHandle_klass()) &&
470 iid != vmIntrinsics::_none) {
471 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
472 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
473 // Do not erase last argument type (MemberName) if it is a static linkTo method.
474 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
475 TempNewSymbol basic_signature =
476 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
477 if (TraceMethodHandles) {
478 ResourceMark rm(THREAD);
479 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
480 name->as_C_string(),
481 full_signature->as_C_string(),
482 basic_signature->as_C_string());
483 }
484 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
485 basic_signature,
486 CHECK_NULL);
487 if (result.not_null()) {
488 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
489 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
490 assert(basic_signature == result->signature(), "predict the result signature");
491 if (TraceMethodHandles) {
492 ttyLocker ttyl;
493 tty->print("lookup_polymorphic_method => intrinsic ");
494 result->print_on(tty);
495 }
496 }
497 return result;
498 } else if (iid == vmIntrinsics::_invokeGeneric
499 && THREAD->can_call_java()
500 && appendix_result_or_null != NULL) {
501 // This is a method with type-checking semantics.
502 // We will ask Java code to spin an adapter method for it.
503 if (!MethodHandles::enabled()) {
504 // Make sure the Java part of the runtime has been booted up.
505 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
506 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
507 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
508 Handle(),
509 Handle(),
510 true,
511 CHECK_NULL);
512 }
513 }
514
515 Handle appendix;
516 Handle method_type;
517 methodHandle result = SystemDictionary::find_method_handle_invoker(
518 klass,
519 name,
520 full_signature,
521 link_info.current_klass(),
522 &appendix,
523 &method_type,
524 CHECK_NULL);
525 if (TraceMethodHandles) {
526 ttyLocker ttyl;
527 tty->print("lookup_polymorphic_method => (via Java) ");
528 result->print_on(tty);
529 tty->print(" lookup_polymorphic_method => appendix = ");
530 if (appendix.is_null()) tty->print_cr("(none)");
531 else appendix->print_on(tty);
532 }
533 if (result.not_null()) {
534 #ifdef ASSERT
535 ResourceMark rm(THREAD);
536
537 TempNewSymbol basic_signature =
538 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
539 int actual_size_of_params = result->size_of_parameters();
540 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
541 // +1 for MethodHandle.this, +1 for trailing MethodType
542 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
543 if (appendix.not_null()) expected_size_of_params += 1;
544 if (actual_size_of_params != expected_size_of_params) {
545 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
546 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
547 result->print();
548 }
549 assert(actual_size_of_params == expected_size_of_params,
550 "%d != %d", actual_size_of_params, expected_size_of_params);
551 #endif //ASSERT
552
553 assert(appendix_result_or_null != NULL, "");
554 (*appendix_result_or_null) = appendix;
555 (*method_type_result) = method_type;
556 }
557 return result;
558 }
559 }
560 return NULL;
561 }
562
563 void LinkResolver::check_method_accessability(Klass* ref_klass,
564 Klass* resolved_klass,
565 Klass* sel_klass,
566 const methodHandle& sel_method,
567 TRAPS) {
568
569 AccessFlags flags = sel_method->access_flags();
570
571 // Special case: arrays always override "clone". JVMS 2.15.
572 // If the resolved klass is an array class, and the declaring class
573 // is java.lang.Object and the method is "clone", set the flags
574 // to public.
575 //
576 // We'll check for the method name first, as that's most likely
577 // to be false (so we'll short-circuit out of these tests).
578 if (sel_method->name() == vmSymbols::clone_name() &&
579 sel_klass == SystemDictionary::Object_klass() &&
580 resolved_klass->is_array_klass()) {
581 // We need to change "protected" to "public".
582 assert(flags.is_protected(), "clone not protected?");
583 jint new_flags = flags.as_int();
584 new_flags = new_flags & (~JVM_ACC_PROTECTED);
585 new_flags = new_flags | JVM_ACC_PUBLIC;
586 flags.set_flags(new_flags);
587 }
588 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
589
590 bool can_access = Reflection::verify_member_access(ref_klass,
591 resolved_klass,
592 sel_klass,
593 flags,
594 true, false, CHECK);
595 // Any existing exceptions that may have been thrown, for example LinkageErrors
596 // from nest-host resolution, have been allowed to propagate.
597 if (!can_access) {
598 ResourceMark rm(THREAD);
599 bool same_module = (sel_klass->module() == ref_klass->module());
600 Exceptions::fthrow(
601 THREAD_AND_LOCATION,
602 vmSymbols::java_lang_IllegalAccessError(),
603 "class %s tried to access %s%s%smethod %s.%s%s (%s%s%s)",
604 ref_klass->external_name(),
605 sel_method->is_abstract() ? "abstract " : "",
606 sel_method->is_protected() ? "protected " : "",
607 sel_method->is_private() ? "private " : "",
608 sel_klass->external_name(),
609 sel_method->name()->as_C_string(),
610 sel_method->signature()->as_C_string(),
611 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
612 (same_module) ? "" : "; ",
613 (same_module) ? "" : sel_klass->class_in_module_of_loader()
614 );
615 return;
616 }
617 }
618
619 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
620 const constantPoolHandle& pool, int index, TRAPS) {
621 // This method is used only
622 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
623 // and
624 // (2) in Bytecode_invoke::static_target
625 // It appears to fail when applied to an invokeinterface call site.
626 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
627 // resolve klass
628 if (code == Bytecodes::_invokedynamic) {
629 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
630 Symbol* method_name = vmSymbols::invoke_name();
631 Symbol* method_signature = pool->signature_ref_at(index);
632 Klass* current_klass = pool->pool_holder();
633 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
634 return resolve_method(link_info, code, THREAD);
635 }
636
637 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
638 Klass* resolved_klass = link_info.resolved_klass();
639
640 if (pool->has_preresolution()
641 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
642 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
643 Method* result = ConstantPool::method_at_if_loaded(pool, index);
644 if (result != NULL) {
645 return methodHandle(THREAD, result);
646 }
647 }
648
649 if (code == Bytecodes::_invokeinterface) {
650 return resolve_interface_method(link_info, code, THREAD);
651 } else if (code == Bytecodes::_invokevirtual) {
652 return resolve_method(link_info, code, THREAD);
653 } else if (!resolved_klass->is_interface()) {
654 return resolve_method(link_info, code, THREAD);
655 } else {
656 return resolve_interface_method(link_info, code, THREAD);
657 }
658 }
659
660 // Check and print a loader constraint violation message for method or interface method
661 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
662 const methodHandle& resolved_method,
663 const char* method_type, TRAPS) {
664 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
665 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
666
667 ResourceMark rm(THREAD);
668 Symbol* failed_type_symbol =
669 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
670 resolved_loader, true, CHECK);
671 if (failed_type_symbol != NULL) {
672 Klass* current_class = link_info.current_klass();
673 ClassLoaderData* current_loader_data = current_class->class_loader_data();
674 assert(current_loader_data != NULL, "current class has no class loader data");
675 Klass* resolved_method_class = resolved_method->method_holder();
676 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
677 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
678
679 stringStream ss;
680 ss.print("loader constraint violation: when resolving %s"
681 " \"%s\" the class loader %s of the current class, %s,"
682 " and the class loader %s for the method's defining class, %s, have"
683 " different Class objects for the type %s used in the signature (%s; %s)",
684 method_type,
685 link_info.method_string(),
686 current_loader_data->loader_name_and_id(),
687 current_class->name()->as_C_string(),
688 target_loader_data->loader_name_and_id(),
689 resolved_method_class->name()->as_C_string(),
690 failed_type_symbol->as_C_string(),
691 current_class->class_in_module_of_loader(false, true),
692 resolved_method_class->class_in_module_of_loader(false, true));
693 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
694 }
695 }
696
697 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
698 Klass* current_klass,
699 Klass* sel_klass, TRAPS) {
700 Handle ref_loader(THREAD, current_klass->class_loader());
701 Handle sel_loader(THREAD, sel_klass->class_loader());
702
703 ResourceMark rm(THREAD); // needed for check_signature_loaders
704 Symbol* failed_type_symbol =
705 SystemDictionary::check_signature_loaders(sig,
706 ref_loader, sel_loader,
707 false,
708 CHECK);
709 if (failed_type_symbol != NULL) {
710 stringStream ss;
711 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
712
713 ss.print("loader constraint violation: when resolving field"
714 " \"%s\" of type %s, the class loader %s of the current class, "
715 "%s, and the class loader %s for the field's defining "
716 "type, %s, have different Class objects for type %s (%s; %s)",
717 field->as_C_string(),
718 failed_type_name,
719 current_klass->class_loader_data()->loader_name_and_id(),
720 current_klass->external_name(),
721 sel_klass->class_loader_data()->loader_name_and_id(),
722 sel_klass->external_name(),
723 failed_type_name,
724 current_klass->class_in_module_of_loader(false, true),
725 sel_klass->class_in_module_of_loader(false, true));
726 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
727 }
728 }
729
730 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
731 Bytecodes::Code code, TRAPS) {
732
733 Handle nested_exception;
734 Klass* resolved_klass = link_info.resolved_klass();
735
736 // 1. For invokevirtual, cannot call an interface method
737 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
738 ResourceMark rm(THREAD);
739 char buf[200];
740 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
741 resolved_klass->external_name());
742 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
743 }
744
745 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
746 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
747 ResourceMark rm(THREAD);
748 char buf[200];
749 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
750 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
751 }
752
753 // 3. lookup method in resolved klass and its super klasses
754 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
755
756 // 4. lookup method in all the interfaces implemented by the resolved klass
757 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
758 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
759
760 if (resolved_method.is_null()) {
761 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
762 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
763 if (HAS_PENDING_EXCEPTION) {
764 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
765 CLEAR_PENDING_EXCEPTION;
766 }
767 }
768 }
769
770 // 5. method lookup failed
771 if (resolved_method.is_null()) {
772 ResourceMark rm(THREAD);
773 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
774 Method::name_and_sig_as_C_string(resolved_klass,
775 link_info.name(),
776 link_info.signature()),
777 nested_exception, NULL);
778 }
779
780 // 6. access checks, access checking may be turned off when calling from within the VM.
781 Klass* current_klass = link_info.current_klass();
782 if (link_info.check_access()) {
783 assert(current_klass != NULL , "current_klass should not be null");
784
785 // check if method can be accessed by the referring class
786 check_method_accessability(current_klass,
787 resolved_klass,
788 resolved_method->method_holder(),
789 resolved_method,
790 CHECK_NULL);
791
792 // check loader constraints
793 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
794 }
795
796 return resolved_method;
797 }
798
799 static void trace_method_resolution(const char* prefix,
800 Klass* klass,
801 Klass* resolved_klass,
802 const methodHandle& method,
803 bool logitables,
804 int index = -1) {
805 #ifndef PRODUCT
806 ResourceMark rm;
807 Log(itables) logi;
808 LogStream lsi(logi.trace());
809 Log(vtables) logv;
810 LogStream lsv(logv.trace());
811 outputStream* st;
812 if (logitables) {
813 st = &lsi;
814 } else {
815 st = &lsv;
816 }
817 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
818 prefix,
819 (klass == NULL ? "<NULL>" : klass->internal_name()),
820 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
821 Method::name_and_sig_as_C_string(resolved_klass,
822 method->name(),
823 method->signature()),
824 method->method_holder()->internal_name());
825 method->print_linkage_flags(st);
826 if (index != -1) {
827 st->print("vtable_index:%d", index);
828 }
829 st->cr();
830 #endif // PRODUCT
831 }
832
833 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
834 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
835
836 Klass* resolved_klass = link_info.resolved_klass();
837
838 // check if klass is interface
839 if (!resolved_klass->is_interface()) {
840 ResourceMark rm(THREAD);
841 char buf[200];
842 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
843 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
844 }
845
846 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
847 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
848 ResourceMark rm(THREAD);
849 char buf[200];
850 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
851 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
852 }
853
854 // lookup method in this interface or its super, java.lang.Object
855 // JDK8: also look for static methods
856 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
857
858 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
859 // lookup method in all the super-interfaces
860 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
861 }
862
863 if (resolved_method.is_null()) {
864 // no method found
865 ResourceMark rm(THREAD);
866 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
867 Method::name_and_sig_as_C_string(resolved_klass,
868 link_info.name(),
869 link_info.signature()));
870 }
871
872 if (link_info.check_access()) {
873 // JDK8 adds non-public interface methods, and accessability check requirement
874 Klass* current_klass = link_info.current_klass();
875
876 assert(current_klass != NULL , "current_klass should not be null");
877
878 // check if method can be accessed by the referring class
879 check_method_accessability(current_klass,
880 resolved_klass,
881 resolved_method->method_holder(),
882 resolved_method,
883 CHECK_NULL);
884
885 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
886 }
887
888 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
889 ResourceMark rm(THREAD);
890 char buf[200];
891 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
892 Method::name_and_sig_as_C_string(resolved_klass,
893 resolved_method->name(), resolved_method->signature()));
894 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
895 }
896
897 if (log_develop_is_enabled(Trace, itables)) {
898 char buf[200];
899 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
900 Bytecodes::name(code));
901 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
902 resolved_method, true);
903 }
904
905 return resolved_method;
906 }
907
908 //------------------------------------------------------------------------------------------------------------------------
909 // Field resolution
910
911 void LinkResolver::check_field_accessability(Klass* ref_klass,
912 Klass* resolved_klass,
913 Klass* sel_klass,
914 const fieldDescriptor& fd,
915 TRAPS) {
916 bool can_access = Reflection::verify_member_access(ref_klass,
917 resolved_klass,
918 sel_klass,
919 fd.access_flags(),
920 true, false, CHECK);
921 // Any existing exceptions that may have been thrown, for example LinkageErrors
922 // from nest-host resolution, have been allowed to propagate.
923 if (!can_access) {
924 bool same_module = (sel_klass->module() == ref_klass->module());
925 ResourceMark rm(THREAD);
926 Exceptions::fthrow(
927 THREAD_AND_LOCATION,
928 vmSymbols::java_lang_IllegalAccessError(),
929 "class %s tried to access %s%sfield %s.%s (%s%s%s)",
930 ref_klass->external_name(),
931 fd.is_protected() ? "protected " : "",
932 fd.is_private() ? "private " : "",
933 sel_klass->external_name(),
934 fd.name()->as_C_string(),
935 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
936 (same_module) ? "" : "; ",
937 (same_module) ? "" : sel_klass->class_in_module_of_loader()
938 );
939 return;
940 }
941 }
942
943 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
944 LinkInfo link_info(pool, index, method, CHECK);
945 resolve_field(fd, link_info, byte, true, CHECK);
946 }
947
948 void LinkResolver::resolve_field(fieldDescriptor& fd,
949 const LinkInfo& link_info,
950 Bytecodes::Code byte, bool initialize_class,
951 TRAPS) {
952 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
953 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
954 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
955 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
956
957 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
958 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
959 // Check if there's a resolved klass containing the field
960 Klass* resolved_klass = link_info.resolved_klass();
961 Symbol* field = link_info.name();
962 Symbol* sig = link_info.signature();
963
964 if (resolved_klass == NULL) {
965 ResourceMark rm(THREAD);
966 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
967 }
968
969 // Resolve instance field
970 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
971 // check if field exists; i.e., if a klass containing the field def has been selected
972 if (sel_klass == NULL) {
973 ResourceMark rm(THREAD);
974 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
975 }
976
977 // Access checking may be turned off when calling from within the VM.
978 Klass* current_klass = link_info.current_klass();
979 if (link_info.check_access()) {
980
981 // check access
982 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
983
984 // check for errors
985 if (is_static != fd.is_static()) {
986 ResourceMark rm(THREAD);
987 char msg[200];
988 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
989 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
990 }
991
992 // A final field can be modified only
993 // (1) by methods declared in the class declaring the field and
994 // (2) by the <clinit> method (in case of a static field)
995 // or by the <init> method (in case of an instance field).
996 if (is_put && fd.access_flags().is_final()) {
997 ResourceMark rm(THREAD);
998 stringStream ss;
999
1000 if (sel_klass != current_klass) {
1001 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1002 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1003 current_klass->external_name());
1004 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1005 }
1006
1007 if (fd.constants()->pool_holder()->major_version() >= 53) {
1008 methodHandle m = link_info.current_method();
1009 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
1010 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1011 fd.is_static() &&
1012 !m()->is_static_initializer());
1013 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1014 !fd.is_static() &&
1015 !m->is_object_initializer());
1016
1017 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1018 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1019 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1020 m()->name()->as_C_string(),
1021 is_static ? "<clinit>" : "<init>");
1022 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1023 }
1024 }
1025 }
1026
1027 // initialize resolved_klass if necessary
1028 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1029 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1030 //
1031 // note 2: we don't want to force initialization if we are just checking
1032 // if the field access is legal; e.g., during compilation
1033 if (is_static && initialize_class) {
1034 sel_klass->initialize(CHECK);
1035 }
1036 }
1037
1038 if ((sel_klass != current_klass) && (current_klass != NULL)) {
1039 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1040 }
1041
1042 // return information. note that the klass is set to the actual klass containing the
1043 // field, otherwise access of static fields in superclasses will not work.
1044 }
1045
1046
1047 //------------------------------------------------------------------------------------------------------------------------
1048 // Invoke resolution
1049 //
1050 // Naming conventions:
1051 //
1052 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1053 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1054 // resolved_klass the specified klass (i.e., specified via constant pool index)
1055 // recv_klass the receiver klass
1056
1057
1058 void LinkResolver::resolve_static_call(CallInfo& result,
1059 const LinkInfo& link_info,
1060 bool initialize_class, TRAPS) {
1061 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1062
1063 // The resolved class can change as a result of this resolution.
1064 Klass* resolved_klass = resolved_method->method_holder();
1065
1066 // Initialize klass (this should only happen if everything is ok)
1067 if (initialize_class && resolved_klass->should_be_initialized()) {
1068 resolved_klass->initialize(CHECK);
1069 // Use updated LinkInfo to reresolve with resolved method holder
1070 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1071 link_info.current_klass(),
1072 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1073 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1074 }
1075
1076 // setup result
1077 result.set_static(resolved_klass, resolved_method, CHECK);
1078 }
1079
1080 // throws linktime exceptions
1081 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1082
1083 Klass* resolved_klass = link_info.resolved_klass();
1084 methodHandle resolved_method;
1085 if (!resolved_klass->is_interface()) {
1086 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1087 } else {
1088 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1089 }
1090 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1091
1092 // check if static
1093 if (!resolved_method->is_static()) {
1094 ResourceMark rm(THREAD);
1095 char buf[200];
1096 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1097 resolved_method->name(),
1098 resolved_method->signature()));
1099 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1100 }
1101 return resolved_method;
1102 }
1103
1104
1105 void LinkResolver::resolve_special_call(CallInfo& result,
1106 Handle recv,
1107 const LinkInfo& link_info,
1108 TRAPS) {
1109 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1110 runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
1111 }
1112
1113 // throws linktime exceptions
1114 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1115 TRAPS) {
1116
1117 // Invokespecial is called for multiple special reasons:
1118 // <init>
1119 // local private method invocation, for classes and interfaces
1120 // superclass.method, which can also resolve to a default method
1121 // and the selected method is recalculated relative to the direct superclass
1122 // superinterface.method, which explicitly does not check shadowing
1123 Klass* resolved_klass = link_info.resolved_klass();
1124 methodHandle resolved_method;
1125
1126 if (!resolved_klass->is_interface()) {
1127 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1128 } else {
1129 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1130 }
1131
1132 // check if method name is <init>, that it is found in same klass as static type
1133 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1134 resolved_method->method_holder() != resolved_klass) {
1135 ResourceMark rm(THREAD);
1136 Exceptions::fthrow(
1137 THREAD_AND_LOCATION,
1138 vmSymbols::java_lang_NoSuchMethodError(),
1139 "%s: method %s%s not found",
1140 resolved_klass->external_name(),
1141 resolved_method->name()->as_C_string(),
1142 resolved_method->signature()->as_C_string()
1143 );
1144 return NULL;
1145 }
1146
1147 // ensure that invokespecial's interface method reference is in
1148 // a direct superinterface, not an indirect superinterface
1149 Klass* current_klass = link_info.current_klass();
1150 if (current_klass != NULL && resolved_klass->is_interface()) {
1151 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1152 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1153 ck :
1154 InstanceKlass::cast(ck->host_klass());
1155 // Disable verification for the dynamically-generated reflection bytecodes.
1156 bool is_reflect = klass_to_check->is_subclass_of(
1157 SystemDictionary::reflect_MagicAccessorImpl_klass());
1158
1159 if (!is_reflect &&
1160 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1161 ResourceMark rm(THREAD);
1162 char buf[200];
1163 jio_snprintf(buf, sizeof(buf),
1164 "Interface method reference: %s, is in an indirect superinterface of %s",
1165 Method::name_and_sig_as_C_string(resolved_klass,
1166 resolved_method->name(),
1167 resolved_method->signature()),
1168 current_klass->external_name());
1169 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1170 }
1171 }
1172
1173 // check if not static
1174 if (resolved_method->is_static()) {
1175 ResourceMark rm(THREAD);
1176 char buf[200];
1177 jio_snprintf(buf, sizeof(buf),
1178 "Expecting non-static method %s",
1179 Method::name_and_sig_as_C_string(resolved_klass,
1180 resolved_method->name(),
1181 resolved_method->signature()));
1182 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1183 }
1184
1185 if (log_develop_is_enabled(Trace, itables)) {
1186 trace_method_resolution("invokespecial resolved method: caller-class:",
1187 current_klass, resolved_klass, resolved_method, true);
1188 }
1189
1190 return resolved_method;
1191 }
1192
1193 // throws runtime exceptions
1194 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1195 const LinkInfo& link_info,
1196 const methodHandle& resolved_method,
1197 Handle recv, TRAPS) {
1198
1199 Klass* resolved_klass = link_info.resolved_klass();
1200
1201 // resolved method is selected method unless we have an old-style lookup
1202 // for a superclass method
1203 // Invokespecial for a superinterface, resolved method is selected method,
1204 // no checks for shadowing
1205 methodHandle sel_method(THREAD, resolved_method());
1206
1207 if (link_info.check_access() &&
1208 // check if the method is not <init>
1209 resolved_method->name() != vmSymbols::object_initializer_name()) {
1210
1211 // check if this is an old-style super call and do a new lookup if so
1212 // a) check if ACC_SUPER flag is set for the current class
1213 Klass* current_klass = link_info.current_klass();
1214 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1215 // b) check if the class of the resolved_klass is a superclass
1216 // (not supertype in order to exclude interface classes) of the current class.
1217 // This check is not performed for super.invoke for interface methods
1218 // in super interfaces.
1219 current_klass->is_subclass_of(resolved_klass) &&
1220 current_klass != resolved_klass
1221 ) {
1222 // Lookup super method
1223 Klass* super_klass = current_klass->super();
1224 sel_method = lookup_instance_method_in_klasses(super_klass,
1225 resolved_method->name(),
1226 resolved_method->signature(),
1227 Klass::find_private, CHECK);
1228 // check if found
1229 if (sel_method.is_null()) {
1230 ResourceMark rm(THREAD);
1231 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1232 Method::name_and_sig_as_C_string(resolved_klass,
1233 resolved_method->name(),
1234 resolved_method->signature()));
1235 // check loader constraints if found a different method
1236 } else if (sel_method() != resolved_method()) {
1237 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1238 }
1239 }
1240
1241 // Check that the class of objectref (the receiver) is the current class or interface,
1242 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1243 // throws IllegalAccessError.
1244 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1245 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1246 // a class. If the sender is an interface, the check has to be performed at runtime.
1247 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1248 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1249 if (sender->is_interface() && recv.not_null()) {
1250 Klass* receiver_klass = recv->klass();
1251 if (!receiver_klass->is_subtype_of(sender)) {
1252 ResourceMark rm(THREAD);
1253 char buf[500];
1254 jio_snprintf(buf, sizeof(buf),
1255 "Receiver class %s must be the current class or a subtype of interface %s",
1256 receiver_klass->name()->as_C_string(),
1257 sender->name()->as_C_string());
1258 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1259 }
1260 }
1261 }
1262
1263 // check if not static
1264 if (sel_method->is_static()) {
1265 ResourceMark rm(THREAD);
1266 char buf[200];
1267 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1268 resolved_method->name(),
1269 resolved_method->signature()));
1270 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1271 }
1272
1273 // check if abstract
1274 if (sel_method->is_abstract()) {
1275 ResourceMark rm(THREAD);
1276 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1277 Method::name_and_sig_as_C_string(resolved_klass,
1278 sel_method->name(),
1279 sel_method->signature()));
1280 }
1281
1282 if (log_develop_is_enabled(Trace, itables)) {
1283 trace_method_resolution("invokespecial selected method: resolved-class:",
1284 resolved_klass, resolved_klass, sel_method, true);
1285 }
1286
1287 // setup result
1288 result.set_static(resolved_klass, sel_method, CHECK);
1289 }
1290
1291 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1292 const LinkInfo& link_info,
1293 bool check_null_and_abstract, TRAPS) {
1294 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1295 runtime_resolve_virtual_method(result, resolved_method,
1296 link_info.resolved_klass(),
1297 recv, receiver_klass,
1298 check_null_and_abstract, CHECK);
1299 }
1300
1301 // throws linktime exceptions
1302 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1303 TRAPS) {
1304 // normal method resolution
1305 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1306
1307 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1308 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1309
1310 // check if private interface method
1311 Klass* resolved_klass = link_info.resolved_klass();
1312 Klass* current_klass = link_info.current_klass();
1313
1314 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1315 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1316 ResourceMark rm(THREAD);
1317 char buf[200];
1318 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1319 Method::name_and_sig_as_C_string(resolved_klass,
1320 resolved_method->name(),
1321 resolved_method->signature()),
1322 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1323 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1324 }
1325
1326 // check if not static
1327 if (resolved_method->is_static()) {
1328 ResourceMark rm(THREAD);
1329 char buf[200];
1330 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1331 resolved_method->name(),
1332 resolved_method->signature()));
1333 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1334 }
1335
1336 if (log_develop_is_enabled(Trace, vtables)) {
1337 trace_method_resolution("invokevirtual resolved method: caller-class:",
1338 current_klass, resolved_klass, resolved_method, false);
1339 }
1340
1341 return resolved_method;
1342 }
1343
1344 // throws runtime exceptions
1345 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1346 const methodHandle& resolved_method,
1347 Klass* resolved_klass,
1348 Handle recv,
1349 Klass* recv_klass,
1350 bool check_null_and_abstract,
1351 TRAPS) {
1352
1353 // setup default return values
1354 int vtable_index = Method::invalid_vtable_index;
1355 methodHandle selected_method;
1356
1357 // runtime method resolution
1358 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1359 THROW(vmSymbols::java_lang_NullPointerException());
1360 }
1361
1362 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1363 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1364 // a missing receiver might result in a bogus lookup.
1365 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1366
1367 // do lookup based on receiver klass using the vtable index
1368 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1369 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1370 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1371
1372 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1373 } else {
1374 // at this point we are sure that resolved_method is virtual and not
1375 // a default or miranda method; therefore, it must have a valid vtable index.
1376 assert(!resolved_method->has_itable_index(), "");
1377 vtable_index = resolved_method->vtable_index();
1378 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1379 // methods, or for final methods. Private methods never appear in the vtable
1380 // and never override other methods. As an optimization, final methods are
1381 // never put in the vtable, unless they override an existing method.
1382 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1383 // resolved method, and it can never be changed by an override.
1384 if (vtable_index == Method::nonvirtual_vtable_index) {
1385 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1386 selected_method = resolved_method;
1387 } else {
1388 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1389 }
1390 }
1391
1392 // check if method exists
1393 if (selected_method.is_null()) {
1394 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1395 }
1396
1397 // check if abstract
1398 if (check_null_and_abstract && selected_method->is_abstract()) {
1399 // Pass arguments for generating a verbose error message.
1400 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1401 }
1402
1403 if (log_develop_is_enabled(Trace, vtables)) {
1404 trace_method_resolution("invokevirtual selected method: receiver-class:",
1405 recv_klass, resolved_klass, selected_method,
1406 false, vtable_index);
1407 }
1408 // setup result
1409 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1410 }
1411
1412 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1413 const LinkInfo& link_info,
1414 bool check_null_and_abstract, TRAPS) {
1415 // throws linktime exceptions
1416 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1417 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1418 recv, recv_klass, check_null_and_abstract, CHECK);
1419 }
1420
1421 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1422 TRAPS) {
1423 // normal interface method resolution
1424 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1425 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1426 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1427
1428 return resolved_method;
1429 }
1430
1431 // throws runtime exceptions
1432 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1433 const methodHandle& resolved_method,
1434 Klass* resolved_klass,
1435 Handle recv,
1436 Klass* recv_klass,
1437 bool check_null_and_abstract, TRAPS) {
1438
1439 // check if receiver exists
1440 if (check_null_and_abstract && recv.is_null()) {
1441 THROW(vmSymbols::java_lang_NullPointerException());
1442 }
1443
1444 // check if receiver klass implements the resolved interface
1445 if (!recv_klass->is_subtype_of(resolved_klass)) {
1446 ResourceMark rm(THREAD);
1447 char buf[200];
1448 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1449 recv_klass->external_name(),
1450 resolved_klass->external_name());
1451 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1452 }
1453
1454 methodHandle selected_method = resolved_method;
1455
1456 // resolve the method in the receiver class, unless it is private
1457 if (!resolved_method()->is_private()) {
1458 // do lookup based on receiver klass
1459 // This search must match the linktime preparation search for itable initialization
1460 // to correctly enforce loader constraints for interface method inheritance.
1461 // Private methods are skipped as the resolved method was not private.
1462 selected_method = lookup_instance_method_in_klasses(recv_klass,
1463 resolved_method->name(),
1464 resolved_method->signature(),
1465 Klass::skip_private, CHECK);
1466
1467 if (selected_method.is_null() && !check_null_and_abstract) {
1468 // In theory this is a harmless placeholder value, but
1469 // in practice leaving in null affects the nsk default method tests.
1470 // This needs further study.
1471 selected_method = resolved_method;
1472 }
1473 // check if method exists
1474 if (selected_method.is_null()) {
1475 // Pass arguments for generating a verbose error message.
1476 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1477 }
1478 // check access
1479 // Throw Illegal Access Error if selected_method is not public.
1480 if (!selected_method->is_public()) {
1481 ResourceMark rm(THREAD);
1482 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1483 Method::name_and_sig_as_C_string(recv_klass,
1484 selected_method->name(),
1485 selected_method->signature()));
1486 }
1487 // check if abstract
1488 if (check_null_and_abstract && selected_method->is_abstract()) {
1489 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1490 }
1491 }
1492
1493 if (log_develop_is_enabled(Trace, itables)) {
1494 trace_method_resolution("invokeinterface selected method: receiver-class:",
1495 recv_klass, resolved_klass, selected_method, true);
1496 }
1497 // setup result
1498 if (resolved_method->has_vtable_index()) {
1499 int vtable_index = resolved_method->vtable_index();
1500 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1501 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1502 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1503 } else if (resolved_method->has_itable_index()) {
1504 int itable_index = resolved_method()->itable_index();
1505 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1506 result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
1507 } else {
1508 int index = resolved_method->vtable_index();
1509 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1510 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1511 assert(resolved_method()->is_private() ||
1512 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1513 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1514 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1515 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1516 result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, index, CHECK);
1517 }
1518 }
1519
1520
1521 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1522 const LinkInfo& link_info) {
1523 EXCEPTION_MARK;
1524 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1525 if (HAS_PENDING_EXCEPTION) {
1526 CLEAR_PENDING_EXCEPTION;
1527 return methodHandle();
1528 } else {
1529 return method_result;
1530 }
1531 }
1532
1533 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1534 const LinkInfo& link_info) {
1535 EXCEPTION_MARK;
1536 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1537 if (HAS_PENDING_EXCEPTION) {
1538 CLEAR_PENDING_EXCEPTION;
1539 return methodHandle();
1540 } else {
1541 return method_result;
1542 }
1543 }
1544
1545 methodHandle LinkResolver::resolve_virtual_call_or_null(
1546 Klass* receiver_klass,
1547 const LinkInfo& link_info) {
1548 EXCEPTION_MARK;
1549 CallInfo info;
1550 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1551 if (HAS_PENDING_EXCEPTION) {
1552 CLEAR_PENDING_EXCEPTION;
1553 return methodHandle();
1554 }
1555 return info.selected_method();
1556 }
1557
1558 methodHandle LinkResolver::resolve_interface_call_or_null(
1559 Klass* receiver_klass,
1560 const LinkInfo& link_info) {
1561 EXCEPTION_MARK;
1562 CallInfo info;
1563 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1564 if (HAS_PENDING_EXCEPTION) {
1565 CLEAR_PENDING_EXCEPTION;
1566 return methodHandle();
1567 }
1568 return info.selected_method();
1569 }
1570
1571 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1572 const LinkInfo& link_info) {
1573 EXCEPTION_MARK;
1574 CallInfo info;
1575 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1576 /*check_null_or_abstract*/false, THREAD);
1577 if (HAS_PENDING_EXCEPTION) {
1578 CLEAR_PENDING_EXCEPTION;
1579 return Method::invalid_vtable_index;
1580 }
1581 return info.vtable_index();
1582 }
1583
1584 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1585 EXCEPTION_MARK;
1586 CallInfo info;
1587 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1588 if (HAS_PENDING_EXCEPTION) {
1589 CLEAR_PENDING_EXCEPTION;
1590 return methodHandle();
1591 }
1592 return info.selected_method();
1593 }
1594
1595 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1596 EXCEPTION_MARK;
1597 CallInfo info;
1598 resolve_special_call(info, Handle(), link_info, THREAD);
1599 if (HAS_PENDING_EXCEPTION) {
1600 CLEAR_PENDING_EXCEPTION;
1601 return methodHandle();
1602 }
1603 return info.selected_method();
1604 }
1605
1606
1607
1608 //------------------------------------------------------------------------------------------------------------------------
1609 // ConstantPool entries
1610
1611 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1612 switch (byte) {
1613 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1614 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1615 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1616 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1617 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1618 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1619 default : break;
1620 }
1621 return;
1622 }
1623
1624 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1625 const methodHandle& attached_method,
1626 Bytecodes::Code byte, TRAPS) {
1627 Klass* defc = attached_method->method_holder();
1628 Symbol* name = attached_method->name();
1629 Symbol* type = attached_method->signature();
1630 LinkInfo link_info(defc, name, type);
1631 switch(byte) {
1632 case Bytecodes::_invokevirtual:
1633 resolve_virtual_call(result, recv, recv->klass(), link_info,
1634 /*check_null_and_abstract=*/true, CHECK);
1635 break;
1636 case Bytecodes::_invokeinterface:
1637 resolve_interface_call(result, recv, recv->klass(), link_info,
1638 /*check_null_and_abstract=*/true, CHECK);
1639 break;
1640 case Bytecodes::_invokestatic:
1641 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1642 break;
1643 case Bytecodes::_invokespecial:
1644 resolve_special_call(result, recv, link_info, CHECK);
1645 break;
1646 default:
1647 fatal("bad call: %s", Bytecodes::name(byte));
1648 break;
1649 }
1650 }
1651
1652 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1653 LinkInfo link_info(pool, index, CHECK);
1654 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1655 }
1656
1657
1658 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1659 const constantPoolHandle& pool, int index, TRAPS) {
1660 LinkInfo link_info(pool, index, CHECK);
1661 resolve_special_call(result, recv, link_info, CHECK);
1662 }
1663
1664
1665 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1666 const constantPoolHandle& pool, int index,
1667 TRAPS) {
1668
1669 LinkInfo link_info(pool, index, CHECK);
1670 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1671 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1672 }
1673
1674
1675 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1676 LinkInfo link_info(pool, index, CHECK);
1677 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1678 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1679 }
1680
1681
1682 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1683 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1684 LinkInfo link_info(pool, index, CHECK);
1685 if (TraceMethodHandles) {
1686 ResourceMark rm(THREAD);
1687 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1688 link_info.signature()->as_C_string());
1689 }
1690 resolve_handle_call(result, link_info, CHECK);
1691 }
1692
1693 void LinkResolver::resolve_handle_call(CallInfo& result,
1694 const LinkInfo& link_info,
1695 TRAPS) {
1696 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1697 Klass* resolved_klass = link_info.resolved_klass();
1698 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1699 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1700 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1701 Handle resolved_appendix;
1702 Handle resolved_method_type;
1703 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1704 &resolved_appendix, &resolved_method_type, CHECK);
1705 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1706 }
1707
1708 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1709 Symbol* method_name = pool->name_ref_at(index);
1710 Symbol* method_signature = pool->signature_ref_at(index);
1711 Klass* current_klass = pool->pool_holder();
1712
1713 // Resolve the bootstrap specifier (BSM + optional arguments).
1714 Handle bootstrap_specifier;
1715 // Check if CallSite has been bound already:
1716 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1717 int pool_index = cpce->constant_pool_index();
1718
1719 if (cpce->is_f1_null()) {
1720 if (cpce->indy_resolution_failed()) {
1721 ConstantPool::throw_resolution_error(pool,
1722 ResolutionErrorTable::encode_cpcache_index(index),
1723 CHECK);
1724 }
1725
1726 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1727 // reference to a method handle which will be the bootstrap method for a dynamic
1728 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1729 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1730 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1731 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1732 // this bootstrap method will encounter the resolution of MethodHandleInError.
1733 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1734 Exceptions::wrap_dynamic_exception(CHECK);
1735 assert(bsm_info != NULL, "");
1736 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1737 bootstrap_specifier = Handle(THREAD, bsm_info);
1738 }
1739 if (!cpce->is_f1_null()) {
1740 methodHandle method( THREAD, cpce->f1_as_method());
1741 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1742 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1743 result.set_handle(method, appendix, method_type, THREAD);
1744 Exceptions::wrap_dynamic_exception(CHECK);
1745 return;
1746 }
1747
1748 if (TraceMethodHandles) {
1749 ResourceMark rm(THREAD);
1750 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1751 ConstantPool::decode_invokedynamic_index(index),
1752 method_name->as_C_string(), method_signature->as_C_string(),
1753 current_klass->name()->as_C_string());
1754 tty->print(" BSM info: "); bootstrap_specifier->print();
1755 }
1756
1757 resolve_dynamic_call(result, pool_index, bootstrap_specifier, method_name,
1758 method_signature, current_klass, THREAD);
1759 if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1760 int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
1761 bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
1762 encoded_index,
1763 pool()->tag_at(pool_index),
1764 CHECK);
1765 if (!recorded_res_status) {
1766 // Another thread got here just before we did. So, either use the method
1767 // that it resolved or throw the LinkageError exception that it threw.
1768 if (!cpce->is_f1_null()) {
1769 methodHandle method( THREAD, cpce->f1_as_method());
1770 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1771 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1772 result.set_handle(method, appendix, method_type, THREAD);
1773 Exceptions::wrap_dynamic_exception(CHECK);
1774 } else {
1775 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
1776 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
1777 }
1778 return;
1779 }
1780 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
1781 }
1782 }
1783
1784 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1785 int pool_index,
1786 Handle bootstrap_specifier,
1787 Symbol* method_name, Symbol* method_signature,
1788 Klass* current_klass,
1789 TRAPS) {
1790 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1791 // The appendix argument is likely to be a freshly-created CallSite.
1792 Handle resolved_appendix;
1793 Handle resolved_method_type;
1794 methodHandle resolved_method =
1795 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1796 pool_index,
1797 bootstrap_specifier,
1798 method_name, method_signature,
1799 &resolved_appendix,
1800 &resolved_method_type,
1801 THREAD);
1802 Exceptions::wrap_dynamic_exception(CHECK);
1803 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1804 Exceptions::wrap_dynamic_exception(CHECK);
1805 }
1806
1807 // Selected method is abstract.
1808 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1809 const methodHandle& selected_method,
1810 Klass *recv_klass, TRAPS) {
1811 Klass *resolved_klass = resolved_method->method_holder();
1812 ResourceMark rm(THREAD);
1813 stringStream ss;
1814
1815 if (recv_klass != NULL) {
1816 ss.print("Receiver class %s does not define or inherit an "
1817 "implementation of the",
1818 recv_klass->external_name());
1819 } else {
1820 ss.print("Missing implementation of");
1821 }
1822
1823 assert(resolved_method.not_null(), "Sanity");
1824 ss.print(" resolved method %s%s%s%s of %s %s.",
1825 resolved_method->is_abstract() ? "abstract " : "",
1826 resolved_method->is_private() ? "private " : "",
1827 resolved_method->name()->as_C_string(),
1828 resolved_method->signature()->as_C_string(),
1829 resolved_klass->external_kind(),
1830 resolved_klass->external_name());
1831
1832 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1833 ss.print(" Selected method is %s%s%s.",
1834 selected_method->is_abstract() ? "abstract " : "",
1835 selected_method->is_private() ? "private " : "",
1836 selected_method->name_and_sig_as_C_string());
1837 }
1838
1839 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1840 }