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 const char* msg = "loader constraint violation: when resolving %s"
673 " \"%s\" the class loader %s of the current class, %s,"
674 " and the class loader %s for the method's defining class, %s, have"
675 " different Class objects for the type %s used in the signature";
676 char* sig = link_info.method_string();
677 const char* loader1_name = java_lang_ClassLoader::describe_external(current_loader());
678 char* current = link_info.current_klass()->name()->as_C_string();
679 const char* loader2_name = java_lang_ClassLoader::describe_external(resolved_loader());
680 char* target = resolved_method->method_holder()->name()->as_C_string();
681 char* failed_type_name = failed_type_symbol->as_C_string();
682 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
683 strlen(current) + strlen(loader2_name) + strlen(target) +
684 strlen(failed_type_name) + strlen(method_type) + 1;
685 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
686 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
687 target, failed_type_name);
688 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
689 }
690 }
691
692 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
693 Klass* current_klass,
694 Klass* sel_klass, TRAPS) {
695 Handle ref_loader(THREAD, current_klass->class_loader());
696 Handle sel_loader(THREAD, sel_klass->class_loader());
697
698 ResourceMark rm(THREAD); // needed for check_signature_loaders
699 Symbol* failed_type_symbol =
700 SystemDictionary::check_signature_loaders(sig,
701 ref_loader, sel_loader,
702 false,
703 CHECK);
704 if (failed_type_symbol != NULL) {
705 const char* msg = "loader constraint violation: when resolving field"
706 " \"%s\" of type %s, the class loader %s of the current class, "
707 "%s, and the class loader %s for the field's defining "
708 "type, %s, have different Class objects for type %s";
709 const char* field_name = field->as_C_string();
710 const char* loader1_name = java_lang_ClassLoader::describe_external(ref_loader());
711 const char* sel = sel_klass->external_name();
712 const char* loader2_name = java_lang_ClassLoader::describe_external(sel_loader());
713 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
714 const char* curr_klass_name = current_klass->external_name();
715 size_t buflen = strlen(msg) + strlen(field_name) + 2 * strlen(failed_type_name) +
716 strlen(loader1_name) + strlen(curr_klass_name) +
717 strlen(loader2_name) + strlen(sel) + 1;
718 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
719 jio_snprintf(buf, buflen, msg, field_name, failed_type_name, loader1_name,
720 curr_klass_name, loader2_name, sel, failed_type_name);
721 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
722 }
723 }
724
725 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
726 Bytecodes::Code code, TRAPS) {
727
728 Handle nested_exception;
729 Klass* resolved_klass = link_info.resolved_klass();
730
731 // 1. For invokevirtual, cannot call an interface method
732 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
733 ResourceMark rm(THREAD);
734 char buf[200];
735 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
736 resolved_klass->external_name());
737 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
738 }
739
740 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
741 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
742 ResourceMark rm(THREAD);
743 char buf[200];
744 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
745 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
746 }
747
748 // 3. lookup method in resolved klass and its super klasses
749 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
750
751 // 4. lookup method in all the interfaces implemented by the resolved klass
752 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
753 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
754
755 if (resolved_method.is_null()) {
756 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
757 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
758 if (HAS_PENDING_EXCEPTION) {
759 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
760 CLEAR_PENDING_EXCEPTION;
761 }
762 }
763 }
764
765 // 5. method lookup failed
766 if (resolved_method.is_null()) {
767 ResourceMark rm(THREAD);
768 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
769 Method::name_and_sig_as_C_string(resolved_klass,
770 link_info.name(),
771 link_info.signature()),
772 nested_exception, NULL);
773 }
774
775 // 6. access checks, access checking may be turned off when calling from within the VM.
776 Klass* current_klass = link_info.current_klass();
777 if (link_info.check_access()) {
778 assert(current_klass != NULL , "current_klass should not be null");
779
780 // check if method can be accessed by the referring class
781 check_method_accessability(current_klass,
782 resolved_klass,
783 resolved_method->method_holder(),
784 resolved_method,
785 CHECK_NULL);
786
787 // check loader constraints
788 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
789 }
790
791 // For private method invocation we should only find the method in the resolved class.
792 // If that is not the case then we have a found a supertype method that we have nestmate
793 // access to.
794 if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) {
795 ResourceMark rm(THREAD);
796 DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);)
797 assert(is_nestmate, "was only expecting nestmates to get here!");
798 Exceptions::fthrow(
799 THREAD_AND_LOCATION,
800 vmSymbols::java_lang_NoSuchMethodError(),
801 "%s: method %s%s not found",
802 resolved_klass->external_name(),
803 resolved_method->name()->as_C_string(),
804 resolved_method->signature()->as_C_string()
805 );
806 return NULL;
807 }
808
809 return resolved_method;
810 }
811
812 static void trace_method_resolution(const char* prefix,
813 Klass* klass,
814 Klass* resolved_klass,
815 const methodHandle& method,
816 bool logitables,
817 int index = -1) {
818 #ifndef PRODUCT
819 ResourceMark rm;
820 Log(itables) logi;
821 LogStream lsi(logi.trace());
822 Log(vtables) logv;
823 LogStream lsv(logv.trace());
824 outputStream* st;
825 if (logitables) {
826 st = &lsi;
827 } else {
828 st = &lsv;
829 }
830 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
831 prefix,
832 (klass == NULL ? "<NULL>" : klass->internal_name()),
833 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
834 Method::name_and_sig_as_C_string(resolved_klass,
835 method->name(),
836 method->signature()),
837 method->method_holder()->internal_name());
838 method->print_linkage_flags(st);
839 if (index != -1) {
840 st->print("vtable_index:%d", index);
841 }
842 st->cr();
843 #endif // PRODUCT
844 }
845
846 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
847 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
848
849 Klass* resolved_klass = link_info.resolved_klass();
850
851 // check if klass is interface
852 if (!resolved_klass->is_interface()) {
853 ResourceMark rm(THREAD);
854 char buf[200];
855 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
856 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
857 }
858
859 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
860 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
861 ResourceMark rm(THREAD);
862 char buf[200];
863 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
864 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
865 }
866
867 // lookup method in this interface or its super, java.lang.Object
868 // JDK8: also look for static methods
869 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
870
871 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
872 // lookup method in all the super-interfaces
873 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
874 }
875
876 if (resolved_method.is_null()) {
877 // no method found
878 ResourceMark rm(THREAD);
879 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
880 Method::name_and_sig_as_C_string(resolved_klass,
881 link_info.name(),
882 link_info.signature()));
883 }
884
885 if (link_info.check_access()) {
886 // JDK8 adds non-public interface methods, and accessability check requirement
887 Klass* current_klass = link_info.current_klass();
888
889 assert(current_klass != NULL , "current_klass should not be null");
890
891 // check if method can be accessed by the referring class
892 check_method_accessability(current_klass,
893 resolved_klass,
894 resolved_method->method_holder(),
895 resolved_method,
896 CHECK_NULL);
897
898 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
899 }
900
901 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
902 ResourceMark rm(THREAD);
903 char buf[200];
904 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
905 Method::name_and_sig_as_C_string(resolved_klass,
906 resolved_method->name(), resolved_method->signature()));
907 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
908 }
909
910 if (log_develop_is_enabled(Trace, itables)) {
911 char buf[200];
912 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
913 Bytecodes::name(code));
914 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
915 resolved_method, true);
916 }
917
918 return resolved_method;
919 }
920
921 //------------------------------------------------------------------------------------------------------------------------
922 // Field resolution
923
924 void LinkResolver::check_field_accessability(Klass* ref_klass,
925 Klass* resolved_klass,
926 Klass* sel_klass,
927 const fieldDescriptor& fd,
928 TRAPS) {
929 bool can_access = Reflection::verify_member_access(ref_klass,
930 resolved_klass,
931 sel_klass,
932 fd.access_flags(),
933 true, false, CHECK);
934 // Any existing exceptions that may have been thrown, for example LinkageErrors
935 // from nest-host resolution, have been allowed to propagate.
936 if (!can_access) {
937 bool same_module = (sel_klass->module() == ref_klass->module());
938 ResourceMark rm(THREAD);
939 Exceptions::fthrow(
940 THREAD_AND_LOCATION,
941 vmSymbols::java_lang_IllegalAccessError(),
942 "class %s tried to access %s%sfield %s.%s (%s%s%s)",
943 ref_klass->external_name(),
944 fd.is_protected() ? "protected " : "",
945 fd.is_private() ? "private " : "",
946 sel_klass->external_name(),
947 fd.name()->as_C_string(),
948 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
949 (same_module) ? "" : "; ",
950 (same_module) ? "" : sel_klass->class_in_module_of_loader()
951 );
952 return;
953 }
954 }
955
956 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
957 LinkInfo link_info(pool, index, method, CHECK);
958 resolve_field(fd, link_info, byte, true, CHECK);
959 }
960
961 void LinkResolver::resolve_field(fieldDescriptor& fd,
962 const LinkInfo& link_info,
963 Bytecodes::Code byte, bool initialize_class,
964 TRAPS) {
965 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
966 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
967 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
968 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
969
970 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
971 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
972 // Check if there's a resolved klass containing the field
973 Klass* resolved_klass = link_info.resolved_klass();
974 Symbol* field = link_info.name();
975 Symbol* sig = link_info.signature();
976
977 if (resolved_klass == NULL) {
978 ResourceMark rm(THREAD);
979 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
980 }
981
982 // Resolve instance field
983 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
984 // check if field exists; i.e., if a klass containing the field def has been selected
985 if (sel_klass == NULL) {
986 ResourceMark rm(THREAD);
987 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
988 }
989
990 if (!link_info.check_access())
991 // Access checking may be turned off when calling from within the VM.
992 return;
993
994 // check access
995 Klass* current_klass = link_info.current_klass();
996 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
997
998 // check for errors
999 if (is_static != fd.is_static()) {
1000 ResourceMark rm(THREAD);
1001 char msg[200];
1002 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
1003 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
1004 }
1005
1006 // A final field can be modified only
1007 // (1) by methods declared in the class declaring the field and
1008 // (2) by the <clinit> method (in case of a static field)
1009 // or by the <init> method (in case of an instance field).
1010 if (is_put && fd.access_flags().is_final()) {
1011 ResourceMark rm(THREAD);
1012 stringStream ss;
1013
1014 if (sel_klass != current_klass) {
1015 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1016 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1017 current_klass->external_name());
1018 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1019 }
1020
1021 if (fd.constants()->pool_holder()->major_version() >= 53) {
1022 methodHandle m = link_info.current_method();
1023 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
1024 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1025 fd.is_static() &&
1026 !m()->is_static_initializer());
1027 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1028 !fd.is_static() &&
1029 !m->is_object_initializer());
1030
1031 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1032 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1033 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1034 m()->name()->as_C_string(),
1035 is_static ? "<clinit>" : "<init>");
1036 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1037 }
1038 }
1039 }
1040
1041 // initialize resolved_klass if necessary
1042 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1043 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1044 //
1045 // note 2: we don't want to force initialization if we are just checking
1046 // if the field access is legal; e.g., during compilation
1047 if (is_static && initialize_class) {
1048 sel_klass->initialize(CHECK);
1049 }
1050
1051 if (sel_klass != current_klass) {
1052 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1053 }
1054
1055 // return information. note that the klass is set to the actual klass containing the
1056 // field, otherwise access of static fields in superclasses will not work.
1057 }
1058
1059
1060 //------------------------------------------------------------------------------------------------------------------------
1061 // Invoke resolution
1062 //
1063 // Naming conventions:
1064 //
1065 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1066 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1067 // resolved_klass the specified klass (i.e., specified via constant pool index)
1068 // recv_klass the receiver klass
1069
1070
1071 void LinkResolver::resolve_static_call(CallInfo& result,
1072 const LinkInfo& link_info,
1073 bool initialize_class, TRAPS) {
1074 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1075
1076 // The resolved class can change as a result of this resolution.
1077 Klass* resolved_klass = resolved_method->method_holder();
1078
1079 // Initialize klass (this should only happen if everything is ok)
1080 if (initialize_class && resolved_klass->should_be_initialized()) {
1081 resolved_klass->initialize(CHECK);
1082 // Use updated LinkInfo to reresolve with resolved method holder
1083 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1084 link_info.current_klass(),
1085 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1086 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1087 }
1088
1089 // setup result
1090 result.set_static(resolved_klass, resolved_method, CHECK);
1091 }
1092
1093 // throws linktime exceptions
1094 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1095
1096 Klass* resolved_klass = link_info.resolved_klass();
1097 methodHandle resolved_method;
1098 if (!resolved_klass->is_interface()) {
1099 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1100 } else {
1101 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1102 }
1103 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1104
1105 // check if static
1106 if (!resolved_method->is_static()) {
1107 ResourceMark rm(THREAD);
1108 char buf[200];
1109 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1110 resolved_method->name(),
1111 resolved_method->signature()));
1112 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1113 }
1114 return resolved_method;
1115 }
1116
1117
1118 void LinkResolver::resolve_special_call(CallInfo& result,
1119 Handle recv,
1120 const LinkInfo& link_info,
1121 TRAPS) {
1122 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1123 runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
1124 }
1125
1126 // throws linktime exceptions
1127 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1128 TRAPS) {
1129
1130 // Invokespecial is called for multiple special reasons:
1131 // <init>
1132 // local private method invocation, for classes and interfaces
1133 // superclass.method, which can also resolve to a default method
1134 // and the selected method is recalculated relative to the direct superclass
1135 // superinterface.method, which explicitly does not check shadowing
1136 Klass* resolved_klass = link_info.resolved_klass();
1137 methodHandle resolved_method;
1138
1139 if (!resolved_klass->is_interface()) {
1140 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1141 } else {
1142 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1143 }
1144
1145 // check if method name is <init>, that it is found in same klass as static type
1146 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1147 resolved_method->method_holder() != resolved_klass) {
1148 ResourceMark rm(THREAD);
1149 Exceptions::fthrow(
1150 THREAD_AND_LOCATION,
1151 vmSymbols::java_lang_NoSuchMethodError(),
1152 "%s: method %s%s not found",
1153 resolved_klass->external_name(),
1154 resolved_method->name()->as_C_string(),
1155 resolved_method->signature()->as_C_string()
1156 );
1157 return NULL;
1158 }
1159
1160 // ensure that invokespecial's interface method reference is in
1161 // a direct superinterface, not an indirect superinterface
1162 Klass* current_klass = link_info.current_klass();
1163 if (current_klass != NULL && resolved_klass->is_interface()) {
1164 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1165 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1166 ck :
1167 InstanceKlass::cast(ck->host_klass());
1168 // Disable verification for the dynamically-generated reflection bytecodes.
1169 bool is_reflect = klass_to_check->is_subclass_of(
1170 SystemDictionary::reflect_MagicAccessorImpl_klass());
1171
1172 if (!is_reflect &&
1173 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1174 ResourceMark rm(THREAD);
1175 char buf[200];
1176 jio_snprintf(buf, sizeof(buf),
1177 "Interface method reference: %s, is in an indirect superinterface of %s",
1178 Method::name_and_sig_as_C_string(resolved_klass,
1179 resolved_method->name(),
1180 resolved_method->signature()),
1181 current_klass->external_name());
1182 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1183 }
1184 }
1185
1186 // check if not static
1187 if (resolved_method->is_static()) {
1188 ResourceMark rm(THREAD);
1189 char buf[200];
1190 jio_snprintf(buf, sizeof(buf),
1191 "Expecting non-static method %s",
1192 Method::name_and_sig_as_C_string(resolved_klass,
1193 resolved_method->name(),
1194 resolved_method->signature()));
1195 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1196 }
1197
1198 if (log_develop_is_enabled(Trace, itables)) {
1199 trace_method_resolution("invokespecial resolved method: caller-class:",
1200 current_klass, resolved_klass, resolved_method, true);
1201 }
1202
1203 return resolved_method;
1204 }
1205
1206 // throws runtime exceptions
1207 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1208 const LinkInfo& link_info,
1209 const methodHandle& resolved_method,
1210 Handle recv, TRAPS) {
1211
1212 Klass* resolved_klass = link_info.resolved_klass();
1213
1214 // resolved method is selected method unless we have an old-style lookup
1215 // for a superclass method
1216 // Invokespecial for a superinterface, resolved method is selected method,
1217 // no checks for shadowing
1218 methodHandle sel_method(THREAD, resolved_method());
1219
1220 if (link_info.check_access() &&
1221 // check if the method is not <init>
1222 resolved_method->name() != vmSymbols::object_initializer_name()) {
1223
1224 // check if this is an old-style super call and do a new lookup if so
1225 // a) check if ACC_SUPER flag is set for the current class
1226 Klass* current_klass = link_info.current_klass();
1227 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1228 // b) check if the class of the resolved_klass is a superclass
1229 // (not supertype in order to exclude interface classes) of the current class.
1230 // This check is not performed for super.invoke for interface methods
1231 // in super interfaces.
1232 current_klass->is_subclass_of(resolved_klass) &&
1233 current_klass != resolved_klass
1234 ) {
1235 // Lookup super method
1236 Klass* super_klass = current_klass->super();
1237 sel_method = lookup_instance_method_in_klasses(super_klass,
1238 resolved_method->name(),
1239 resolved_method->signature(),
1240 Klass::find_private, CHECK);
1241 // check if found
1242 if (sel_method.is_null()) {
1243 ResourceMark rm(THREAD);
1244 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1245 Method::name_and_sig_as_C_string(resolved_klass,
1246 resolved_method->name(),
1247 resolved_method->signature()));
1248 // check loader constraints if found a different method
1249 } else if (sel_method() != resolved_method()) {
1250 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1251 }
1252 }
1253
1254 // Check that the class of objectref (the receiver) is the current class or interface,
1255 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1256 // throws IllegalAccessError.
1257 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1258 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1259 // a class. If the sender is an interface, the check has to be performed at runtime.
1260 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1261 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1262 if (sender->is_interface() && recv.not_null()) {
1263 Klass* receiver_klass = recv->klass();
1264 if (!receiver_klass->is_subtype_of(sender)) {
1265 ResourceMark rm(THREAD);
1266 char buf[500];
1267 jio_snprintf(buf, sizeof(buf),
1268 "Receiver class %s must be the current class or a subtype of interface %s",
1269 receiver_klass->name()->as_C_string(),
1270 sender->name()->as_C_string());
1271 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1272 }
1273 }
1274 }
1275
1276 // check if not static
1277 if (sel_method->is_static()) {
1278 ResourceMark rm(THREAD);
1279 char buf[200];
1280 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1281 resolved_method->name(),
1282 resolved_method->signature()));
1283 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1284 }
1285
1286 // check if abstract
1287 if (sel_method->is_abstract()) {
1288 ResourceMark rm(THREAD);
1289 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1290 Method::name_and_sig_as_C_string(resolved_klass,
1291 sel_method->name(),
1292 sel_method->signature()));
1293 }
1294
1295 if (log_develop_is_enabled(Trace, itables)) {
1296 trace_method_resolution("invokespecial selected method: resolved-class:",
1297 resolved_klass, resolved_klass, sel_method, true);
1298 }
1299
1300 // setup result
1301 result.set_static(resolved_klass, sel_method, CHECK);
1302 }
1303
1304 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1305 const LinkInfo& link_info,
1306 bool check_null_and_abstract, TRAPS) {
1307 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1308 runtime_resolve_virtual_method(result, resolved_method,
1309 link_info.resolved_klass(),
1310 recv, receiver_klass,
1311 check_null_and_abstract, CHECK);
1312 }
1313
1314 // throws linktime exceptions
1315 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1316 TRAPS) {
1317 // normal method resolution
1318 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1319
1320 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1321 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1322
1323 // check if private interface method
1324 Klass* resolved_klass = link_info.resolved_klass();
1325 Klass* current_klass = link_info.current_klass();
1326
1327 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1328 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1329 ResourceMark rm(THREAD);
1330 char buf[200];
1331 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1332 Method::name_and_sig_as_C_string(resolved_klass,
1333 resolved_method->name(),
1334 resolved_method->signature()),
1335 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1336 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1337 }
1338
1339 // check if not static
1340 if (resolved_method->is_static()) {
1341 ResourceMark rm(THREAD);
1342 char buf[200];
1343 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1344 resolved_method->name(),
1345 resolved_method->signature()));
1346 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1347 }
1348
1349 if (log_develop_is_enabled(Trace, vtables)) {
1350 trace_method_resolution("invokevirtual resolved method: caller-class:",
1351 current_klass, resolved_klass, resolved_method, false);
1352 }
1353
1354 return resolved_method;
1355 }
1356
1357 // throws runtime exceptions
1358 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1359 const methodHandle& resolved_method,
1360 Klass* resolved_klass,
1361 Handle recv,
1362 Klass* recv_klass,
1363 bool check_null_and_abstract,
1364 TRAPS) {
1365
1366 // setup default return values
1367 int vtable_index = Method::invalid_vtable_index;
1368 methodHandle selected_method;
1369
1370 // runtime method resolution
1371 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1372 THROW(vmSymbols::java_lang_NullPointerException());
1373 }
1374
1375 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1376 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1377 // a missing receiver might result in a bogus lookup.
1378 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1379
1380 // do lookup based on receiver klass using the vtable index
1381 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1382 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1383 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1384
1385 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1386 } else {
1387 // at this point we are sure that resolved_method is virtual and not
1388 // a default or miranda method; therefore, it must have a valid vtable index.
1389 assert(!resolved_method->has_itable_index(), "");
1390 vtable_index = resolved_method->vtable_index();
1391 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1392 // methods, or for final methods. Private methods never appear in the vtable
1393 // and never override other methods. As an optimization, final methods are
1394 // never put in the vtable, unless they override an existing method.
1395 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1396 // resolved method, and it can never be changed by an override.
1397 if (vtable_index == Method::nonvirtual_vtable_index) {
1398 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1399 selected_method = resolved_method;
1400 } else {
1401 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1402 }
1403 }
1404
1405 // check if method exists
1406 if (selected_method.is_null()) {
1407 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1408 }
1409
1410 // check if abstract
1411 if (check_null_and_abstract && selected_method->is_abstract()) {
1412 // Pass arguments for generating a verbose error message.
1413 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1414 }
1415
1416 if (log_develop_is_enabled(Trace, vtables)) {
1417 trace_method_resolution("invokevirtual selected method: receiver-class:",
1418 recv_klass, resolved_klass, selected_method,
1419 false, vtable_index);
1420 }
1421 // setup result
1422 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1423 }
1424
1425 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1426 const LinkInfo& link_info,
1427 bool check_null_and_abstract, TRAPS) {
1428 // throws linktime exceptions
1429 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1430 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1431 recv, recv_klass, check_null_and_abstract, CHECK);
1432 }
1433
1434 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1435 TRAPS) {
1436 // normal interface method resolution
1437 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1438 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1439 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1440
1441 return resolved_method;
1442 }
1443
1444 // throws runtime exceptions
1445 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1446 const methodHandle& resolved_method,
1447 Klass* resolved_klass,
1448 Handle recv,
1449 Klass* recv_klass,
1450 bool check_null_and_abstract, TRAPS) {
1451
1452 // check if receiver exists
1453 if (check_null_and_abstract && recv.is_null()) {
1454 THROW(vmSymbols::java_lang_NullPointerException());
1455 }
1456
1457 // check if receiver klass implements the resolved interface
1458 if (!recv_klass->is_subtype_of(resolved_klass)) {
1459 ResourceMark rm(THREAD);
1460 char buf[200];
1461 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1462 recv_klass->external_name(),
1463 resolved_klass->external_name());
1464 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1465 }
1466
1467 methodHandle selected_method = resolved_method;
1468
1469 // resolve the method in the receiver class, unless it is private
1470 if (!resolved_method()->is_private()) {
1471 // do lookup based on receiver klass
1472 // This search must match the linktime preparation search for itable initialization
1473 // to correctly enforce loader constraints for interface method inheritance.
1474 // Private methods are skipped as the resolved method was not private.
1475 selected_method = lookup_instance_method_in_klasses(recv_klass,
1476 resolved_method->name(),
1477 resolved_method->signature(),
1478 Klass::skip_private, CHECK);
1479
1480 if (selected_method.is_null() && !check_null_and_abstract) {
1481 // In theory this is a harmless placeholder value, but
1482 // in practice leaving in null affects the nsk default method tests.
1483 // This needs further study.
1484 selected_method = resolved_method;
1485 }
1486 // check if method exists
1487 if (selected_method.is_null()) {
1488 // Pass arguments for generating a verbose error message.
1489 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1490 }
1491 // check access
1492 // Throw Illegal Access Error if selected_method is not public.
1493 if (!selected_method->is_public()) {
1494 ResourceMark rm(THREAD);
1495 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1496 Method::name_and_sig_as_C_string(recv_klass,
1497 selected_method->name(),
1498 selected_method->signature()));
1499 }
1500 // check if abstract
1501 if (check_null_and_abstract && selected_method->is_abstract()) {
1502 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1503 }
1504 }
1505
1506 if (log_develop_is_enabled(Trace, itables)) {
1507 trace_method_resolution("invokeinterface selected method: receiver-class:",
1508 recv_klass, resolved_klass, selected_method, true);
1509 }
1510 // setup result
1511 if (resolved_method->has_vtable_index()) {
1512 int vtable_index = resolved_method->vtable_index();
1513 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1514 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1515 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1516 } else if (resolved_method->has_itable_index()) {
1517 int itable_index = resolved_method()->itable_index();
1518 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1519 result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
1520 } else {
1521 int index = resolved_method->vtable_index();
1522 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1523 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1524 assert(resolved_method()->is_private() ||
1525 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1526 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1527 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1528 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1529 result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, index, CHECK);
1530 }
1531 }
1532
1533
1534 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1535 const LinkInfo& link_info) {
1536 EXCEPTION_MARK;
1537 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1538 if (HAS_PENDING_EXCEPTION) {
1539 CLEAR_PENDING_EXCEPTION;
1540 return methodHandle();
1541 } else {
1542 return method_result;
1543 }
1544 }
1545
1546 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1547 const LinkInfo& link_info) {
1548 EXCEPTION_MARK;
1549 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1550 if (HAS_PENDING_EXCEPTION) {
1551 CLEAR_PENDING_EXCEPTION;
1552 return methodHandle();
1553 } else {
1554 return method_result;
1555 }
1556 }
1557
1558 methodHandle LinkResolver::resolve_virtual_call_or_null(
1559 Klass* receiver_klass,
1560 const LinkInfo& link_info) {
1561 EXCEPTION_MARK;
1562 CallInfo info;
1563 resolve_virtual_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 methodHandle LinkResolver::resolve_interface_call_or_null(
1572 Klass* receiver_klass,
1573 const LinkInfo& link_info) {
1574 EXCEPTION_MARK;
1575 CallInfo info;
1576 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1577 if (HAS_PENDING_EXCEPTION) {
1578 CLEAR_PENDING_EXCEPTION;
1579 return methodHandle();
1580 }
1581 return info.selected_method();
1582 }
1583
1584 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1585 const LinkInfo& link_info) {
1586 EXCEPTION_MARK;
1587 CallInfo info;
1588 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1589 /*check_null_or_abstract*/false, THREAD);
1590 if (HAS_PENDING_EXCEPTION) {
1591 CLEAR_PENDING_EXCEPTION;
1592 return Method::invalid_vtable_index;
1593 }
1594 return info.vtable_index();
1595 }
1596
1597 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1598 EXCEPTION_MARK;
1599 CallInfo info;
1600 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1601 if (HAS_PENDING_EXCEPTION) {
1602 CLEAR_PENDING_EXCEPTION;
1603 return methodHandle();
1604 }
1605 return info.selected_method();
1606 }
1607
1608 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1609 EXCEPTION_MARK;
1610 CallInfo info;
1611 resolve_special_call(info, Handle(), link_info, THREAD);
1612 if (HAS_PENDING_EXCEPTION) {
1613 CLEAR_PENDING_EXCEPTION;
1614 return methodHandle();
1615 }
1616 return info.selected_method();
1617 }
1618
1619
1620
1621 //------------------------------------------------------------------------------------------------------------------------
1622 // ConstantPool entries
1623
1624 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1625 switch (byte) {
1626 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1627 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1628 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1629 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1630 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1631 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1632 default : break;
1633 }
1634 return;
1635 }
1636
1637 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1638 const methodHandle& attached_method,
1639 Bytecodes::Code byte, TRAPS) {
1640 Klass* defc = attached_method->method_holder();
1641 Symbol* name = attached_method->name();
1642 Symbol* type = attached_method->signature();
1643 LinkInfo link_info(defc, name, type);
1644 switch(byte) {
1645 case Bytecodes::_invokevirtual:
1646 resolve_virtual_call(result, recv, recv->klass(), link_info,
1647 /*check_null_and_abstract=*/true, CHECK);
1648 break;
1649 case Bytecodes::_invokeinterface:
1650 resolve_interface_call(result, recv, recv->klass(), link_info,
1651 /*check_null_and_abstract=*/true, CHECK);
1652 break;
1653 case Bytecodes::_invokestatic:
1654 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1655 break;
1656 case Bytecodes::_invokespecial:
1657 resolve_special_call(result, recv, link_info, CHECK);
1658 break;
1659 default:
1660 fatal("bad call: %s", Bytecodes::name(byte));
1661 break;
1662 }
1663 }
1664
1665 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1666 LinkInfo link_info(pool, index, CHECK);
1667 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1668 }
1669
1670
1671 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1672 const constantPoolHandle& pool, int index, TRAPS) {
1673 LinkInfo link_info(pool, index, CHECK);
1674 resolve_special_call(result, recv, link_info, CHECK);
1675 }
1676
1677
1678 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1679 const constantPoolHandle& pool, int index,
1680 TRAPS) {
1681
1682 LinkInfo link_info(pool, index, CHECK);
1683 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1684 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1685 }
1686
1687
1688 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1689 LinkInfo link_info(pool, index, CHECK);
1690 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1691 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1692 }
1693
1694
1695 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1696 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1697 LinkInfo link_info(pool, index, CHECK);
1698 if (TraceMethodHandles) {
1699 ResourceMark rm(THREAD);
1700 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1701 link_info.signature()->as_C_string());
1702 }
1703 resolve_handle_call(result, link_info, CHECK);
1704 }
1705
1706 void LinkResolver::resolve_handle_call(CallInfo& result,
1707 const LinkInfo& link_info,
1708 TRAPS) {
1709 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1710 Klass* resolved_klass = link_info.resolved_klass();
1711 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1712 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1713 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1714 Handle resolved_appendix;
1715 Handle resolved_method_type;
1716 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1717 &resolved_appendix, &resolved_method_type, CHECK);
1718 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1719 }
1720
1721 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1722 Symbol* method_name = pool->name_ref_at(index);
1723 Symbol* method_signature = pool->signature_ref_at(index);
1724 Klass* current_klass = pool->pool_holder();
1725
1726 // Resolve the bootstrap specifier (BSM + optional arguments).
1727 Handle bootstrap_specifier;
1728 // Check if CallSite has been bound already:
1729 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1730 int pool_index = cpce->constant_pool_index();
1731
1732 if (cpce->is_f1_null()) {
1733 if (cpce->indy_resolution_failed()) {
1734 ConstantPool::throw_resolution_error(pool,
1735 ResolutionErrorTable::encode_cpcache_index(index),
1736 CHECK);
1737 }
1738
1739 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1740 // reference to a method handle which will be the bootstrap method for a dynamic
1741 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1742 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1743 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1744 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1745 // this bootstrap method will encounter the resolution of MethodHandleInError.
1746 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1747 Exceptions::wrap_dynamic_exception(CHECK);
1748 assert(bsm_info != NULL, "");
1749 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1750 bootstrap_specifier = Handle(THREAD, bsm_info);
1751 }
1752 if (!cpce->is_f1_null()) {
1753 methodHandle method( THREAD, cpce->f1_as_method());
1754 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1755 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1756 result.set_handle(method, appendix, method_type, THREAD);
1757 Exceptions::wrap_dynamic_exception(CHECK);
1758 return;
1759 }
1760
1761 if (TraceMethodHandles) {
1762 ResourceMark rm(THREAD);
1763 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1764 ConstantPool::decode_invokedynamic_index(index),
1765 method_name->as_C_string(), method_signature->as_C_string(),
1766 current_klass->name()->as_C_string());
1767 tty->print(" BSM info: "); bootstrap_specifier->print();
1768 }
1769
1770 resolve_dynamic_call(result, pool_index, bootstrap_specifier, method_name,
1771 method_signature, current_klass, THREAD);
1772 if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1773 int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
1774 bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
1775 encoded_index,
1776 pool()->tag_at(pool_index),
1777 CHECK);
1778 if (!recorded_res_status) {
1779 // Another thread got here just before we did. So, either use the method
1780 // that it resolved or throw the LinkageError exception that it threw.
1781 if (!cpce->is_f1_null()) {
1782 methodHandle method( THREAD, cpce->f1_as_method());
1783 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1784 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1785 result.set_handle(method, appendix, method_type, THREAD);
1786 Exceptions::wrap_dynamic_exception(CHECK);
1787 } else {
1788 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
1789 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
1790 }
1791 return;
1792 }
1793 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
1794 }
1795 }
1796
1797 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1798 int pool_index,
1799 Handle bootstrap_specifier,
1800 Symbol* method_name, Symbol* method_signature,
1801 Klass* current_klass,
1802 TRAPS) {
1803 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1804 // The appendix argument is likely to be a freshly-created CallSite.
1805 Handle resolved_appendix;
1806 Handle resolved_method_type;
1807 methodHandle resolved_method =
1808 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1809 pool_index,
1810 bootstrap_specifier,
1811 method_name, method_signature,
1812 &resolved_appendix,
1813 &resolved_method_type,
1814 THREAD);
1815 Exceptions::wrap_dynamic_exception(CHECK);
1816 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1817 Exceptions::wrap_dynamic_exception(CHECK);
1818 }
1819
1820 // Selected method is abstract.
1821 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1822 const methodHandle& selected_method,
1823 Klass *recv_klass, TRAPS) {
1824 Klass *resolved_klass = resolved_method->method_holder();
1825 ResourceMark rm(THREAD);
1826 stringStream ss;
1827
1828 if (recv_klass != NULL) {
1829 ss.print("Receiver class %s does not define or inherit an "
1830 "implementation of the",
1831 recv_klass->external_name());
1832 } else {
1833 ss.print("Missing implementation of");
1834 }
1835
1836 assert(resolved_method.not_null(), "Sanity");
1837 ss.print(" resolved method %s%s%s%s of %s %s.",
1838 resolved_method->is_abstract() ? "abstract " : "",
1839 resolved_method->is_private() ? "private " : "",
1840 resolved_method->name()->as_C_string(),
1841 resolved_method->signature()->as_C_string(),
1842 resolved_klass->external_kind(),
1843 resolved_klass->external_name());
1844
1845 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1846 ss.print(" Selected method is %s%s%s.",
1847 selected_method->is_abstract() ? "abstract " : "",
1848 selected_method->is_private() ? "private " : "",
1849 selected_method->name_and_sig_as_C_string());
1850 }
1851
1852 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1853 }