1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/defaultMethods.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/resolutionErrors.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "gc/shared/collectedHeap.inline.hpp"
35 #include "interpreter/bytecode.hpp"
36 #include "interpreter/interpreterRuntime.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.inline.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "prims/methodHandles.hpp"
48 #include "prims/nativeLookup.hpp"
49 #include "runtime/compilationPolicy.hpp"
50 #include "runtime/fieldDescriptor.hpp"
51 #include "runtime/frame.inline.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/reflection.hpp"
54 #include "runtime/signature.hpp"
55 #include "runtime/thread.inline.hpp"
56 #include "runtime/vmThread.hpp"
57
58 //------------------------------------------------------------------------------------------------------------------------
59 // Implementation of CallInfo
60
61
62 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
63 int vtable_index = Method::nonvirtual_vtable_index;
64 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
65 }
66
67
68 void CallInfo::set_interface(Klass* resolved_klass,
69 Klass* selected_klass,
70 const methodHandle& resolved_method,
71 const methodHandle& selected_method,
72 int itable_index, TRAPS) {
73 // This is only called for interface methods. If the resolved_method
74 // comes from java/lang/Object, it can be the subject of a virtual call, so
75 // we should pick the vtable index from the resolved method.
76 // In that case, the caller must call set_virtual instead of set_interface.
77 assert(resolved_method->method_holder()->is_interface(), "");
78 assert(itable_index == resolved_method()->itable_index(), "");
79 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
80 }
81
82 void CallInfo::set_virtual(Klass* resolved_klass,
83 Klass* selected_klass,
84 const methodHandle& resolved_method,
85 const methodHandle& selected_method,
86 int vtable_index, TRAPS) {
87 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
88 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
89 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
90 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
91 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
92 }
93
94 void CallInfo::set_handle(const methodHandle& resolved_method,
95 Handle resolved_appendix,
96 Handle resolved_method_type, TRAPS) {
97 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
98 }
99
100 void CallInfo::set_handle(Klass* resolved_klass,
101 const methodHandle& resolved_method,
102 Handle resolved_appendix,
103 Handle resolved_method_type, TRAPS) {
104 if (resolved_method.is_null()) {
105 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
106 }
107 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
108 resolved_method->is_compiled_lambda_form(),
109 "linkMethod must return one of these");
110 int vtable_index = Method::nonvirtual_vtable_index;
111 assert(!resolved_method->has_vtable_index(), "");
112 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
113 _resolved_appendix = resolved_appendix;
114 _resolved_method_type = resolved_method_type;
115 }
116
117 void CallInfo::set_common(Klass* resolved_klass,
118 Klass* selected_klass,
119 const methodHandle& resolved_method,
120 const methodHandle& selected_method,
121 CallKind kind,
122 int index,
123 TRAPS) {
124 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
125 _resolved_klass = resolved_klass;
126 _selected_klass = selected_klass;
127 _resolved_method = resolved_method;
128 _selected_method = selected_method;
129 _call_kind = kind;
130 _call_index = index;
131 _resolved_appendix = Handle();
132 DEBUG_ONLY(verify()); // verify before making side effects
133
134 CompilationPolicy::compile_if_required(selected_method, THREAD);
135 }
136
137 // utility query for unreflecting a method
138 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
139 Klass* resolved_method_holder = resolved_method->method_holder();
140 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
141 resolved_klass = resolved_method_holder;
142 }
143 _resolved_klass = resolved_klass;
144 _selected_klass = resolved_klass;
145 _resolved_method = resolved_method;
146 _selected_method = resolved_method;
147 // classify:
148 CallKind kind = CallInfo::unknown_kind;
149 int index = resolved_method->vtable_index();
150 if (resolved_method->can_be_statically_bound()) {
151 kind = CallInfo::direct_call;
152 } else if (!resolved_method_holder->is_interface()) {
153 // Could be an Object method inherited into an interface, but still a vtable call.
154 kind = CallInfo::vtable_call;
155 } else if (!resolved_klass->is_interface()) {
156 // A default or miranda method. Compute the vtable index.
157 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
158 resolved_method);
159 assert(index >= 0 , "we should have valid vtable index at this point");
160
161 kind = CallInfo::vtable_call;
162 } else if (resolved_method->has_vtable_index()) {
163 // Can occur if an interface redeclares a method of Object.
164
165 #ifdef ASSERT
166 // Ensure that this is really the case.
167 Klass* object_klass = SystemDictionary::Object_klass();
168 Method * object_resolved_method = object_klass->vtable().method_at(index);
169 assert(object_resolved_method->name() == resolved_method->name(),
170 "Object and interface method names should match at vtable index %d, %s != %s",
171 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
172 assert(object_resolved_method->signature() == resolved_method->signature(),
173 "Object and interface method signatures should match at vtable index %d, %s != %s",
174 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
175 #endif // ASSERT
176
177 kind = CallInfo::vtable_call;
178 } else {
179 // A regular interface call.
180 kind = CallInfo::itable_call;
181 index = resolved_method->itable_index();
182 }
183 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
184 _call_kind = kind;
185 _call_index = index;
186 _resolved_appendix = Handle();
187 // Find or create a ResolvedMethod instance for this Method*
188 set_resolved_method_name(CHECK);
189
190 DEBUG_ONLY(verify());
191 }
192
193 void CallInfo::set_resolved_method_name(TRAPS) {
194 Method* m = _resolved_method();
195 assert(m != NULL, "Should already have a Method*");
196 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
197 _resolved_method_name = Handle(THREAD, rmethod_name);
198 }
199
200 #ifdef ASSERT
201 void CallInfo::verify() {
202 switch (call_kind()) { // the meaning and allowed value of index depends on kind
203 case CallInfo::direct_call:
204 if (_call_index == Method::nonvirtual_vtable_index) break;
205 // else fall through to check vtable index:
206 case CallInfo::vtable_call:
207 assert(resolved_klass()->verify_vtable_index(_call_index), "");
208 break;
209 case CallInfo::itable_call:
210 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
211 break;
212 case CallInfo::unknown_kind:
213 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
214 break;
215 default:
216 fatal("Unexpected call kind %d", call_kind());
217 }
218 }
219 #endif //ASSERT
220
221 #ifndef PRODUCT
222 void CallInfo::print() {
223 ResourceMark rm;
224 const char* kindstr;
225 switch (_call_kind) {
226 case direct_call: kindstr = "direct"; break;
227 case vtable_call: kindstr = "vtable"; break;
228 case itable_call: kindstr = "itable"; break;
229 default : kindstr = "unknown"; break;
230 }
231 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
232 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
233 }
234 #endif
235
236 //------------------------------------------------------------------------------------------------------------------------
237 // Implementation of LinkInfo
238
239 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
240 // resolve klass
241 _resolved_klass = pool->klass_ref_at(index, CHECK);
242
243 // Get name, signature, and static klass
244 _name = pool->name_ref_at(index);
245 _signature = pool->signature_ref_at(index);
246 _tag = pool->tag_ref_at(index);
247 _current_klass = pool->pool_holder();
248 _current_method = current_method;
249
250 // Coming from the constant pool always checks access
251 _check_access = true;
252 }
253
254 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
255 // resolve klass
256 _resolved_klass = pool->klass_ref_at(index, CHECK);
257
258 // Get name, signature, and static klass
259 _name = pool->name_ref_at(index);
260 _signature = pool->signature_ref_at(index);
261 _tag = pool->tag_ref_at(index);
262 _current_klass = pool->pool_holder();
263 _current_method = methodHandle();
264
265 // Coming from the constant pool always checks access
266 _check_access = true;
267 }
268
269 char* LinkInfo::method_string() const {
270 return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature);
271 }
272
273 #ifndef PRODUCT
274 void LinkInfo::print() {
275 ResourceMark rm;
276 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
277 _resolved_klass->name()->as_C_string(),
278 _name->as_C_string(),
279 _signature->as_C_string(),
280 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
281 _check_access ? "true" : "false");
282 }
283 #endif // PRODUCT
284 //------------------------------------------------------------------------------------------------------------------------
285 // Klass resolution
286
287 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
288 bool fold_type_to_class, TRAPS) {
289 Klass* base_klass = sel_klass;
290 if (fold_type_to_class) {
291 if (sel_klass->is_objArray_klass()) {
292 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
293 }
294 // The element type could be a typeArray - we only need the access
295 // check if it is an reference to another class.
296 if (!base_klass->is_instance_klass()) {
297 return; // no relevant check to do
298 }
299 }
300 Reflection::VerifyClassAccessResults vca_result =
301 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
302 if (vca_result != Reflection::ACCESS_OK) {
303 ResourceMark rm(THREAD);
304 char* msg = Reflection::verify_class_access_msg(ref_klass,
305 InstanceKlass::cast(base_klass),
306 vca_result);
307 if (msg == NULL) {
308 Exceptions::fthrow(
309 THREAD_AND_LOCATION,
310 vmSymbols::java_lang_IllegalAccessError(),
311 "failed to access class %s from class %s",
312 base_klass->external_name(),
313 ref_klass->external_name());
314 } else {
315 // Use module specific message returned by verify_class_access_msg().
316 Exceptions::fthrow(
317 THREAD_AND_LOCATION,
318 vmSymbols::java_lang_IllegalAccessError(),
319 "%s", msg);
320 }
321 }
322 }
323
324 //------------------------------------------------------------------------------------------------------------------------
325 // Method resolution
326 //
327 // According to JVM spec. $5.4.3c & $5.4.3d
328
329 // Look up method in klasses, including static methods
330 // Then look up local default methods
331 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
332 bool checkpolymorphism,
333 bool in_imethod_resolve) {
334 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
335
336 Klass* klass = link_info.resolved_klass();
337 Symbol* name = link_info.name();
338 Symbol* signature = link_info.signature();
339
340 // Ignore overpasses so statics can be found during resolution
341 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
342
343 if (klass->is_array_klass()) {
344 // Only consider klass and super klass for arrays
345 return result;
346 }
347
348 InstanceKlass* ik = InstanceKlass::cast(klass);
349
350 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
351 // ignore static and non-public methods of java.lang.Object,
352 // like clone, finalize, registerNatives.
353 if (in_imethod_resolve &&
354 result != NULL &&
355 ik->is_interface() &&
356 (result->is_static() || !result->is_public()) &&
357 result->method_holder() == SystemDictionary::Object_klass()) {
358 result = NULL;
359 }
360
361 // Before considering default methods, check for an overpass in the
362 // current class if a method has not been found.
363 if (result == NULL) {
364 result = ik->find_method(name, signature);
365 }
366
367 if (result == NULL) {
368 Array<Method*>* default_methods = ik->default_methods();
369 if (default_methods != NULL) {
370 result = InstanceKlass::find_method(default_methods, name, signature);
371 }
372 }
373
374 if (checkpolymorphism && result != NULL) {
375 vmIntrinsics::ID iid = result->intrinsic_id();
376 if (MethodHandles::is_signature_polymorphic(iid)) {
377 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
378 return NULL;
379 }
380 }
381 return result;
382 }
383
384 // returns first instance method
385 // Looks up method in classes, then looks up local default methods
386 methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
387 Symbol* name,
388 Symbol* signature, TRAPS) {
389 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
390
391 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
392 Klass* super_klass = result->method_holder()->super();
393 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
394 }
395
396 if (klass->is_array_klass()) {
397 // Only consider klass and super klass for arrays
398 return methodHandle(THREAD, result);
399 }
400
401 if (result == NULL) {
402 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
403 if (default_methods != NULL) {
404 result = InstanceKlass::find_method(default_methods, name, signature);
405 assert(result == NULL || !result->is_static(), "static defaults not allowed");
406 }
407 }
408 return methodHandle(THREAD, result);
409 }
410
411 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
412 const methodHandle& resolved_method) {
413
414 int vtable_index = Method::invalid_vtable_index;
415 Symbol* name = resolved_method->name();
416 Symbol* signature = resolved_method->signature();
417 InstanceKlass* ik = InstanceKlass::cast(klass);
418
419 // First check in default method array
420 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
421 int index = InstanceKlass::find_method_index(ik->default_methods(),
422 name, signature, Klass::find_overpass,
423 Klass::find_static, Klass::find_private);
424 if (index >= 0 ) {
425 vtable_index = ik->default_vtable_indices()->at(index);
426 }
427 }
428 if (vtable_index == Method::invalid_vtable_index) {
429 // get vtable_index for miranda methods
430 klassVtable vt = ik->vtable();
431 vtable_index = vt.index_of_miranda(name, signature);
432 }
433 return vtable_index;
434 }
435
436 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
437 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
438
439 // Specify 'true' in order to skip default methods when searching the
440 // interfaces. Function lookup_method_in_klasses() already looked for
441 // the method in the default methods table.
442 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
443 }
444
445 methodHandle LinkResolver::lookup_polymorphic_method(
446 const LinkInfo& link_info,
447 Handle *appendix_result_or_null,
448 Handle *method_type_result,
449 TRAPS) {
450 Klass* klass = link_info.resolved_klass();
451 Symbol* name = link_info.name();
452 Symbol* full_signature = link_info.signature();
453
454 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
455 if (TraceMethodHandles) {
456 ResourceMark rm(THREAD);
457 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
458 vmIntrinsics::name_at(iid), klass->external_name(),
459 name->as_C_string(), full_signature->as_C_string());
460 }
461 if ((klass == SystemDictionary::MethodHandle_klass() ||
462 klass == SystemDictionary::VarHandle_klass()) &&
463 iid != vmIntrinsics::_none) {
464 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
465 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
466 // Do not erase last argument type (MemberName) if it is a static linkTo method.
467 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
468 TempNewSymbol basic_signature =
469 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
470 if (TraceMethodHandles) {
471 ResourceMark rm(THREAD);
472 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
473 name->as_C_string(),
474 full_signature->as_C_string(),
475 basic_signature->as_C_string());
476 }
477 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
478 basic_signature,
479 CHECK_NULL);
480 if (result.not_null()) {
481 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
482 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
483 assert(basic_signature == result->signature(), "predict the result signature");
484 if (TraceMethodHandles) {
485 ttyLocker ttyl;
486 tty->print("lookup_polymorphic_method => intrinsic ");
487 result->print_on(tty);
488 }
489 }
490 return result;
491 } else if (iid == vmIntrinsics::_invokeGeneric
492 && THREAD->can_call_java()
493 && appendix_result_or_null != NULL) {
494 // This is a method with type-checking semantics.
495 // We will ask Java code to spin an adapter method for it.
496 if (!MethodHandles::enabled()) {
497 // Make sure the Java part of the runtime has been booted up.
498 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
499 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
500 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
501 Handle(),
502 Handle(),
503 true,
504 CHECK_NULL);
505 }
506 }
507
508 Handle appendix;
509 Handle method_type;
510 methodHandle result = SystemDictionary::find_method_handle_invoker(
511 klass,
512 name,
513 full_signature,
514 link_info.current_klass(),
515 &appendix,
516 &method_type,
517 CHECK_NULL);
518 if (TraceMethodHandles) {
519 ttyLocker ttyl;
520 tty->print("lookup_polymorphic_method => (via Java) ");
521 result->print_on(tty);
522 tty->print(" lookup_polymorphic_method => appendix = ");
523 if (appendix.is_null()) tty->print_cr("(none)");
524 else appendix->print_on(tty);
525 }
526 if (result.not_null()) {
527 #ifdef ASSERT
528 ResourceMark rm(THREAD);
529
530 TempNewSymbol basic_signature =
531 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
532 int actual_size_of_params = result->size_of_parameters();
533 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
534 // +1 for MethodHandle.this, +1 for trailing MethodType
535 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
536 if (appendix.not_null()) expected_size_of_params += 1;
537 if (actual_size_of_params != expected_size_of_params) {
538 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
539 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
540 result->print();
541 }
542 assert(actual_size_of_params == expected_size_of_params,
543 "%d != %d", actual_size_of_params, expected_size_of_params);
544 #endif //ASSERT
545
546 assert(appendix_result_or_null != NULL, "");
547 (*appendix_result_or_null) = appendix;
548 (*method_type_result) = method_type;
549 }
550 return result;
551 }
552 }
553 return NULL;
554 }
555
556 void LinkResolver::check_method_accessability(Klass* ref_klass,
557 Klass* resolved_klass,
558 Klass* sel_klass,
559 const methodHandle& sel_method,
560 TRAPS) {
561
562 AccessFlags flags = sel_method->access_flags();
563
564 // Special case: arrays always override "clone". JVMS 2.15.
565 // If the resolved klass is an array class, and the declaring class
566 // is java.lang.Object and the method is "clone", set the flags
567 // to public.
568 //
569 // We'll check for the method name first, as that's most likely
570 // to be false (so we'll short-circuit out of these tests).
571 if (sel_method->name() == vmSymbols::clone_name() &&
572 sel_klass == SystemDictionary::Object_klass() &&
573 resolved_klass->is_array_klass()) {
574 // We need to change "protected" to "public".
575 assert(flags.is_protected(), "clone not protected?");
576 jint new_flags = flags.as_int();
577 new_flags = new_flags & (~JVM_ACC_PROTECTED);
578 new_flags = new_flags | JVM_ACC_PUBLIC;
579 flags.set_flags(new_flags);
580 }
581 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
582
583 if (!Reflection::verify_field_access(ref_klass,
584 resolved_klass,
585 sel_klass,
586 flags,
587 true)) {
588 ResourceMark rm(THREAD);
589 Exceptions::fthrow(
590 THREAD_AND_LOCATION,
591 vmSymbols::java_lang_IllegalAccessError(),
592 "tried to access method %s.%s%s from class %s",
593 sel_klass->external_name(),
594 sel_method->name()->as_C_string(),
595 sel_method->signature()->as_C_string(),
596 ref_klass->external_name()
597 );
598 return;
599 }
600 }
601
602 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
603 const constantPoolHandle& pool, int index, TRAPS) {
604 // This method is used only
605 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
606 // and
607 // (2) in Bytecode_invoke::static_target
608 // It appears to fail when applied to an invokeinterface call site.
609 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
610 // resolve klass
611 if (code == Bytecodes::_invokedynamic) {
612 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
613 Symbol* method_name = vmSymbols::invoke_name();
614 Symbol* method_signature = pool->signature_ref_at(index);
615 Klass* current_klass = pool->pool_holder();
616 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
617 return resolve_method(link_info, code, THREAD);
618 }
619
620 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
621 Klass* resolved_klass = link_info.resolved_klass();
622
623 if (pool->has_preresolution()
624 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
625 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
626 Method* result = ConstantPool::method_at_if_loaded(pool, index);
627 if (result != NULL) {
628 return methodHandle(THREAD, result);
629 }
630 }
631
632 if (code == Bytecodes::_invokeinterface) {
633 return resolve_interface_method(link_info, code, THREAD);
634 } else if (code == Bytecodes::_invokevirtual) {
635 return resolve_method(link_info, code, THREAD);
636 } else if (!resolved_klass->is_interface()) {
637 return resolve_method(link_info, code, THREAD);
638 } else {
639 return resolve_interface_method(link_info, code, THREAD);
640 }
641 }
642
643 // Check and print a loader constraint violation message for method or interface method
644 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
645 const methodHandle& resolved_method,
646 const char* method_type, TRAPS) {
647 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
648 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
649
650 ResourceMark rm(THREAD);
651 Symbol* failed_type_symbol =
652 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
653 resolved_loader, true, CHECK);
654 if (failed_type_symbol != NULL) {
655 const char* msg = "loader constraint violation: when resolving %s"
656 " \"%s\" the class loader (instance of %s) of the current class, %s,"
657 " and the class loader (instance of %s) for the method's defining class, %s, have"
658 " different Class objects for the type %s used in the signature";
659 char* sig = link_info.method_string();
660 const char* loader1_name = SystemDictionary::loader_name(current_loader());
661 char* current = link_info.current_klass()->name()->as_C_string();
662 const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
663 char* target = resolved_method->method_holder()->name()->as_C_string();
664 char* failed_type_name = failed_type_symbol->as_C_string();
665 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
666 strlen(current) + strlen(loader2_name) + strlen(target) +
667 strlen(failed_type_name) + strlen(method_type) + 1;
668 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
669 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
670 target, failed_type_name);
671 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
672 }
673 }
674
675 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
676 Klass* current_klass,
677 Klass* sel_klass, TRAPS) {
678 Handle ref_loader(THREAD, current_klass->class_loader());
679 Handle sel_loader(THREAD, sel_klass->class_loader());
680
681 ResourceMark rm(THREAD); // needed for check_signature_loaders
682 Symbol* failed_type_symbol =
683 SystemDictionary::check_signature_loaders(sig,
684 ref_loader, sel_loader,
685 false,
686 CHECK);
687 if (failed_type_symbol != NULL) {
688 const char* msg = "loader constraint violation: when resolving field"
689 " \"%s\" the class loader (instance of %s) of the referring class, "
690 "%s, and the class loader (instance of %s) for the field's resolved "
691 "type, %s, have different Class objects for that type";
692 char* field_name = field->as_C_string();
693 const char* loader1_name = SystemDictionary::loader_name(ref_loader());
694 char* sel = sel_klass->name()->as_C_string();
695 const char* loader2_name = SystemDictionary::loader_name(sel_loader());
696 char* failed_type_name = failed_type_symbol->as_C_string();
697 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
698 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
699 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
700 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
701 failed_type_name);
702 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
703 }
704 }
705
706 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
707 Bytecodes::Code code, TRAPS) {
708
709 Handle nested_exception;
710 Klass* resolved_klass = link_info.resolved_klass();
711
712 // 1. For invokevirtual, cannot call an interface method
713 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
714 ResourceMark rm(THREAD);
715 char buf[200];
716 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
717 resolved_klass->external_name());
718 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
719 }
720
721 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
722 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
723 ResourceMark rm(THREAD);
724 char buf[200];
725 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
726 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
727 }
728
729 // 3. lookup method in resolved klass and its super klasses
730 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
731
732 // 4. lookup method in all the interfaces implemented by the resolved klass
733 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
734 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
735
736 if (resolved_method.is_null()) {
737 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
738 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
739 if (HAS_PENDING_EXCEPTION) {
740 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
741 CLEAR_PENDING_EXCEPTION;
742 }
743 }
744 }
745
746 // 5. method lookup failed
747 if (resolved_method.is_null()) {
748 ResourceMark rm(THREAD);
749 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
750 Method::name_and_sig_as_C_string(resolved_klass,
751 link_info.name(),
752 link_info.signature()),
753 nested_exception, NULL);
754 }
755
756 // 5. access checks, access checking may be turned off when calling from within the VM.
757 Klass* current_klass = link_info.current_klass();
758 if (link_info.check_access()) {
759 assert(current_klass != NULL , "current_klass should not be null");
760
761 // check if method can be accessed by the referring class
762 check_method_accessability(current_klass,
763 resolved_klass,
764 resolved_method->method_holder(),
765 resolved_method,
766 CHECK_NULL);
767
768 // check loader constraints
769 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
770 }
771
772 return resolved_method;
773 }
774
775 static void trace_method_resolution(const char* prefix,
776 Klass* klass,
777 Klass* resolved_klass,
778 const methodHandle& method,
779 bool logitables,
780 int index = -1) {
781 #ifndef PRODUCT
782 ResourceMark rm;
783 Log(itables) logi;
784 LogStream lsi(logi.trace());
785 Log(vtables) logv;
786 LogStream lsv(logv.trace());
787 outputStream* st;
788 if (logitables) {
789 st = &lsi;
790 } else {
791 st = &lsv;
792 }
793 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
794 prefix,
795 (klass == NULL ? "<NULL>" : klass->internal_name()),
796 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
797 Method::name_and_sig_as_C_string(resolved_klass,
798 method->name(),
799 method->signature()),
800 method->method_holder()->internal_name());
801 method->print_linkage_flags(st);
802 if (index != -1) {
803 st->print("vtable_index:%d", index);
804 }
805 st->cr();
806 #endif // PRODUCT
807 }
808
809 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
810 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
811
812 Klass* resolved_klass = link_info.resolved_klass();
813
814 // check if klass is interface
815 if (!resolved_klass->is_interface()) {
816 ResourceMark rm(THREAD);
817 char buf[200];
818 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
819 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
820 }
821
822 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
823 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
824 ResourceMark rm(THREAD);
825 char buf[200];
826 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
827 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
828 }
829
830 // lookup method in this interface or its super, java.lang.Object
831 // JDK8: also look for static methods
832 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
833
834 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
835 // lookup method in all the super-interfaces
836 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
837 }
838
839 if (resolved_method.is_null()) {
840 // no method found
841 ResourceMark rm(THREAD);
842 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
843 Method::name_and_sig_as_C_string(resolved_klass,
844 link_info.name(),
845 link_info.signature()));
846 }
847
848 if (link_info.check_access()) {
849 // JDK8 adds non-public interface methods, and accessability check requirement
850 Klass* current_klass = link_info.current_klass();
851
852 assert(current_klass != NULL , "current_klass should not be null");
853
854 // check if method can be accessed by the referring class
855 check_method_accessability(current_klass,
856 resolved_klass,
857 resolved_method->method_holder(),
858 resolved_method,
859 CHECK_NULL);
860
861 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
862 }
863
864 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
865 ResourceMark rm(THREAD);
866 char buf[200];
867 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
868 Method::name_and_sig_as_C_string(resolved_klass,
869 resolved_method->name(), resolved_method->signature()));
870 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
871 }
872
873 if (code == Bytecodes::_invokeinterface && resolved_method->is_private()) {
874 ResourceMark rm(THREAD);
875 char buf[200];
876
877 Klass* current_klass = link_info.current_klass();
878 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s, caller-class:%s",
879 Method::name_and_sig_as_C_string(resolved_klass,
880 resolved_method->name(),
881 resolved_method->signature()),
882 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
883 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
884 }
885
886 if (log_develop_is_enabled(Trace, itables)) {
887 char buf[200];
888 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
889 Bytecodes::name(code));
890 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
891 resolved_method, true);
892 }
893
894 return resolved_method;
895 }
896
897 //------------------------------------------------------------------------------------------------------------------------
898 // Field resolution
899
900 void LinkResolver::check_field_accessability(Klass* ref_klass,
901 Klass* resolved_klass,
902 Klass* sel_klass,
903 const fieldDescriptor& fd,
904 TRAPS) {
905 if (!Reflection::verify_field_access(ref_klass,
906 resolved_klass,
907 sel_klass,
908 fd.access_flags(),
909 true)) {
910 ResourceMark rm(THREAD);
911 Exceptions::fthrow(
912 THREAD_AND_LOCATION,
913 vmSymbols::java_lang_IllegalAccessError(),
914 "tried to access field %s.%s from class %s",
915 sel_klass->external_name(),
916 fd.name()->as_C_string(),
917 ref_klass->external_name()
918 );
919 return;
920 }
921 }
922
923 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
924 LinkInfo link_info(pool, index, method, CHECK);
925 resolve_field(fd, link_info, byte, true, CHECK);
926 }
927
928 void LinkResolver::resolve_field(fieldDescriptor& fd,
929 const LinkInfo& link_info,
930 Bytecodes::Code byte, bool initialize_class,
931 TRAPS) {
932 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
933 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
934 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
935 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
936
937 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
938 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
939 // Check if there's a resolved klass containing the field
940 Klass* resolved_klass = link_info.resolved_klass();
941 Symbol* field = link_info.name();
942 Symbol* sig = link_info.signature();
943
944 if (resolved_klass == NULL) {
945 ResourceMark rm(THREAD);
946 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
947 }
948
949 // Resolve instance field
950 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
951 // check if field exists; i.e., if a klass containing the field def has been selected
952 if (sel_klass == NULL) {
953 ResourceMark rm(THREAD);
954 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
955 }
956
957 if (!link_info.check_access())
958 // Access checking may be turned off when calling from within the VM.
959 return;
960
961 // check access
962 Klass* current_klass = link_info.current_klass();
963 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
964
965 // check for errors
966 if (is_static != fd.is_static()) {
967 ResourceMark rm(THREAD);
968 char msg[200];
969 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
970 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
971 }
972
973 // A final field can be modified only
974 // (1) by methods declared in the class declaring the field and
975 // (2) by the <clinit> method (in case of a static field)
976 // or by the <init> method (in case of an instance field).
977 if (is_put && fd.access_flags().is_final()) {
978 ResourceMark rm(THREAD);
979 stringStream ss;
980
981 if (sel_klass != current_klass) {
982 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
983 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
984 current_klass->external_name());
985 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
986 }
987
988 if (fd.constants()->pool_holder()->major_version() >= 53) {
989 methodHandle m = link_info.current_method();
990 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
991 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
992 fd.is_static() &&
993 !m()->is_static_initializer());
994 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
995 !fd.is_static() &&
996 !m->is_object_initializer());
997
998 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
999 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1000 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1001 m()->name()->as_C_string(),
1002 is_static ? "<clinit>" : "<init>");
1003 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1004 }
1005 }
1006 }
1007
1008 // initialize resolved_klass if necessary
1009 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1010 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1011 //
1012 // note 2: we don't want to force initialization if we are just checking
1013 // if the field access is legal; e.g., during compilation
1014 if (is_static && initialize_class) {
1015 sel_klass->initialize(CHECK);
1016 }
1017
1018 if (sel_klass != current_klass) {
1019 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1020 }
1021
1022 // return information. note that the klass is set to the actual klass containing the
1023 // field, otherwise access of static fields in superclasses will not work.
1024 }
1025
1026
1027 //------------------------------------------------------------------------------------------------------------------------
1028 // Invoke resolution
1029 //
1030 // Naming conventions:
1031 //
1032 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1033 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1034 // resolved_klass the specified klass (i.e., specified via constant pool index)
1035 // recv_klass the receiver klass
1036
1037
1038 void LinkResolver::resolve_static_call(CallInfo& result,
1039 const LinkInfo& link_info,
1040 bool initialize_class, TRAPS) {
1041 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1042
1043 // The resolved class can change as a result of this resolution.
1044 Klass* resolved_klass = resolved_method->method_holder();
1045
1046 // Initialize klass (this should only happen if everything is ok)
1047 if (initialize_class && resolved_klass->should_be_initialized()) {
1048 resolved_klass->initialize(CHECK);
1049 // Use updated LinkInfo to reresolve with resolved method holder
1050 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1051 link_info.current_klass(),
1052 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1053 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1054 }
1055
1056 // setup result
1057 result.set_static(resolved_klass, resolved_method, CHECK);
1058 }
1059
1060 // throws linktime exceptions
1061 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1062
1063 Klass* resolved_klass = link_info.resolved_klass();
1064 methodHandle resolved_method;
1065 if (!resolved_klass->is_interface()) {
1066 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1067 } else {
1068 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1069 }
1070 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1071
1072 // check if static
1073 if (!resolved_method->is_static()) {
1074 ResourceMark rm(THREAD);
1075 char buf[200];
1076 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1077 resolved_method->name(),
1078 resolved_method->signature()));
1079 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1080 }
1081 return resolved_method;
1082 }
1083
1084
1085 void LinkResolver::resolve_special_call(CallInfo& result,
1086 Handle recv,
1087 const LinkInfo& link_info,
1088 TRAPS) {
1089 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1090 runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
1091 }
1092
1093 // throws linktime exceptions
1094 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1095 TRAPS) {
1096
1097 // Invokespecial is called for multiple special reasons:
1098 // <init>
1099 // local private method invocation, for classes and interfaces
1100 // superclass.method, which can also resolve to a default method
1101 // and the selected method is recalculated relative to the direct superclass
1102 // superinterface.method, which explicitly does not check shadowing
1103 Klass* resolved_klass = link_info.resolved_klass();
1104 methodHandle resolved_method;
1105
1106 if (!resolved_klass->is_interface()) {
1107 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1108 } else {
1109 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1110 }
1111
1112 // check if method name is <init>, that it is found in same klass as static type
1113 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1114 resolved_method->method_holder() != resolved_klass) {
1115 ResourceMark rm(THREAD);
1116 Exceptions::fthrow(
1117 THREAD_AND_LOCATION,
1118 vmSymbols::java_lang_NoSuchMethodError(),
1119 "%s: method %s%s not found",
1120 resolved_klass->external_name(),
1121 resolved_method->name()->as_C_string(),
1122 resolved_method->signature()->as_C_string()
1123 );
1124 return NULL;
1125 }
1126
1127 // check if invokespecial's interface method reference is in an indirect superinterface
1128 Klass* current_klass = link_info.current_klass();
1129 if (current_klass != NULL && resolved_klass->is_interface()) {
1130 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1131 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1132 ck :
1133 InstanceKlass::cast(ck->host_klass());
1134 // Disable verification for the dynamically-generated reflection bytecodes.
1135 bool is_reflect = klass_to_check->is_subclass_of(
1136 SystemDictionary::reflect_MagicAccessorImpl_klass());
1137
1138 if (!is_reflect &&
1139 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1140 ResourceMark rm(THREAD);
1141 char buf[200];
1142 jio_snprintf(buf, sizeof(buf),
1143 "Interface method reference: %s, is in an indirect superinterface of %s",
1144 Method::name_and_sig_as_C_string(resolved_klass,
1145 resolved_method->name(),
1146 resolved_method->signature()),
1147 current_klass->external_name());
1148 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1149 }
1150 }
1151
1152 // check if not static
1153 if (resolved_method->is_static()) {
1154 ResourceMark rm(THREAD);
1155 char buf[200];
1156 jio_snprintf(buf, sizeof(buf),
1157 "Expecting non-static method %s",
1158 Method::name_and_sig_as_C_string(resolved_klass,
1159 resolved_method->name(),
1160 resolved_method->signature()));
1161 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1162 }
1163
1164 if (log_develop_is_enabled(Trace, itables)) {
1165 trace_method_resolution("invokespecial resolved method: caller-class:",
1166 current_klass, resolved_klass, resolved_method, true);
1167 }
1168
1169 return resolved_method;
1170 }
1171
1172 // throws runtime exceptions
1173 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1174 const LinkInfo& link_info,
1175 const methodHandle& resolved_method,
1176 Handle recv, TRAPS) {
1177
1178 Klass* resolved_klass = link_info.resolved_klass();
1179
1180 // resolved method is selected method unless we have an old-style lookup
1181 // for a superclass method
1182 // Invokespecial for a superinterface, resolved method is selected method,
1183 // no checks for shadowing
1184 methodHandle sel_method(THREAD, resolved_method());
1185
1186 if (link_info.check_access() &&
1187 // check if the method is not <init>
1188 resolved_method->name() != vmSymbols::object_initializer_name()) {
1189
1190 // check if this is an old-style super call and do a new lookup if so
1191 // a) check if ACC_SUPER flag is set for the current class
1192 Klass* current_klass = link_info.current_klass();
1193 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1194 // b) check if the class of the resolved_klass is a superclass
1195 // (not supertype in order to exclude interface classes) of the current class.
1196 // This check is not performed for super.invoke for interface methods
1197 // in super interfaces.
1198 current_klass->is_subclass_of(resolved_klass) &&
1199 current_klass != resolved_klass) {
1200 // Lookup super method
1201 Klass* super_klass = current_klass->super();
1202 sel_method = lookup_instance_method_in_klasses(super_klass,
1203 resolved_method->name(),
1204 resolved_method->signature(), CHECK);
1205 // check if found
1206 if (sel_method.is_null()) {
1207 ResourceMark rm(THREAD);
1208 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1209 Method::name_and_sig_as_C_string(resolved_klass,
1210 resolved_method->name(),
1211 resolved_method->signature()));
1212 // check loader constraints if found a different method
1213 } else if (sel_method() != resolved_method()) {
1214 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1215 }
1216 }
1217
1218 // Check that the class of objectref (the receiver) is the current class or interface,
1219 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1220 // throws IllegalAccessError.
1221 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1222 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1223 // a class. If the sender is an interface, the check has to be performed at runtime.
1224 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1225 sender = sender->is_anonymous() ? sender->host_klass() : sender;
1226 if (sender->is_interface() && recv.not_null()) {
1227 Klass* receiver_klass = recv->klass();
1228 if (!receiver_klass->is_subtype_of(sender)) {
1229 ResourceMark rm(THREAD);
1230 char buf[500];
1231 jio_snprintf(buf, sizeof(buf),
1232 "Receiver class %s must be the current class or a subtype of interface %s",
1233 receiver_klass->name()->as_C_string(),
1234 sender->name()->as_C_string());
1235 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1236 }
1237 }
1238 }
1239
1240 // check if not static
1241 if (sel_method->is_static()) {
1242 ResourceMark rm(THREAD);
1243 char buf[200];
1244 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1245 resolved_method->name(),
1246 resolved_method->signature()));
1247 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1248 }
1249
1250 // check if abstract
1251 if (sel_method->is_abstract()) {
1252 ResourceMark rm(THREAD);
1253 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1254 Method::name_and_sig_as_C_string(resolved_klass,
1255 sel_method->name(),
1256 sel_method->signature()));
1257 }
1258
1259 if (log_develop_is_enabled(Trace, itables)) {
1260 trace_method_resolution("invokespecial selected method: resolved-class:",
1261 resolved_klass, resolved_klass, sel_method, true);
1262 }
1263
1264 // setup result
1265 result.set_static(resolved_klass, sel_method, CHECK);
1266 }
1267
1268 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1269 const LinkInfo& link_info,
1270 bool check_null_and_abstract, TRAPS) {
1271 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1272 runtime_resolve_virtual_method(result, resolved_method,
1273 link_info.resolved_klass(),
1274 recv, receiver_klass,
1275 check_null_and_abstract, CHECK);
1276 }
1277
1278 // throws linktime exceptions
1279 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1280 TRAPS) {
1281 // normal method resolution
1282 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1283
1284 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1285 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1286
1287 // check if private interface method
1288 Klass* resolved_klass = link_info.resolved_klass();
1289 Klass* current_klass = link_info.current_klass();
1290
1291 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1292 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1293 ResourceMark rm(THREAD);
1294 char buf[200];
1295 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1296 Method::name_and_sig_as_C_string(resolved_klass,
1297 resolved_method->name(),
1298 resolved_method->signature()),
1299 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1300 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1301 }
1302
1303 // check if not static
1304 if (resolved_method->is_static()) {
1305 ResourceMark rm(THREAD);
1306 char buf[200];
1307 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1308 resolved_method->name(),
1309 resolved_method->signature()));
1310 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1311 }
1312
1313 if (log_develop_is_enabled(Trace, vtables)) {
1314 trace_method_resolution("invokevirtual resolved method: caller-class:",
1315 current_klass, resolved_klass, resolved_method, false);
1316 }
1317
1318 return resolved_method;
1319 }
1320
1321 // throws runtime exceptions
1322 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1323 const methodHandle& resolved_method,
1324 Klass* resolved_klass,
1325 Handle recv,
1326 Klass* recv_klass,
1327 bool check_null_and_abstract,
1328 TRAPS) {
1329
1330 // setup default return values
1331 int vtable_index = Method::invalid_vtable_index;
1332 methodHandle selected_method;
1333
1334 // runtime method resolution
1335 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1336 THROW(vmSymbols::java_lang_NullPointerException());
1337 }
1338
1339 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1340 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1341 // a missing receiver might result in a bogus lookup.
1342 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1343
1344 // do lookup based on receiver klass using the vtable index
1345 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1346 vtable_index = vtable_index_of_interface_method(resolved_klass,
1347 resolved_method);
1348 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1349
1350 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1351 } else {
1352 // at this point we are sure that resolved_method is virtual and not
1353 // a default or miranda method; therefore, it must have a valid vtable index.
1354 assert(!resolved_method->has_itable_index(), "");
1355 vtable_index = resolved_method->vtable_index();
1356 // We could get a negative vtable_index for final methods,
1357 // because as an optimization they are they are never put in the vtable,
1358 // unless they override an existing method.
1359 // If we do get a negative, it means the resolved method is the the selected
1360 // method, and it can never be changed by an override.
1361 if (vtable_index == Method::nonvirtual_vtable_index) {
1362 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1363 selected_method = resolved_method;
1364 } else {
1365 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1366 }
1367 }
1368
1369 // check if method exists
1370 if (selected_method.is_null()) {
1371 ResourceMark rm(THREAD);
1372 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1373 Method::name_and_sig_as_C_string(resolved_klass,
1374 resolved_method->name(),
1375 resolved_method->signature()));
1376 }
1377
1378 // check if abstract
1379 if (check_null_and_abstract && selected_method->is_abstract()) {
1380 ResourceMark rm(THREAD);
1381 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1382 Method::name_and_sig_as_C_string(resolved_klass,
1383 selected_method->name(),
1384 selected_method->signature()));
1385 }
1386
1387 if (log_develop_is_enabled(Trace, vtables)) {
1388 trace_method_resolution("invokevirtual selected method: receiver-class:",
1389 recv_klass, resolved_klass, selected_method,
1390 false, vtable_index);
1391 }
1392 // setup result
1393 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1394 }
1395
1396 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1397 const LinkInfo& link_info,
1398 bool check_null_and_abstract, TRAPS) {
1399 // throws linktime exceptions
1400 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1401 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1402 recv, recv_klass, check_null_and_abstract, CHECK);
1403 }
1404
1405 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1406 TRAPS) {
1407 // normal interface method resolution
1408 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1409 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1410 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1411
1412 return resolved_method;
1413 }
1414
1415 // throws runtime exceptions
1416 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1417 const methodHandle& resolved_method,
1418 Klass* resolved_klass,
1419 Handle recv,
1420 Klass* recv_klass,
1421 bool check_null_and_abstract, TRAPS) {
1422 // check if receiver exists
1423 if (check_null_and_abstract && recv.is_null()) {
1424 THROW(vmSymbols::java_lang_NullPointerException());
1425 }
1426
1427 // check if receiver klass implements the resolved interface
1428 if (!recv_klass->is_subtype_of(resolved_klass)) {
1429 ResourceMark rm(THREAD);
1430 char buf[200];
1431 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1432 recv_klass->external_name(),
1433 resolved_klass->external_name());
1434 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1435 }
1436
1437 // do lookup based on receiver klass
1438 // This search must match the linktime preparation search for itable initialization
1439 // to correctly enforce loader constraints for interface method inheritance
1440 methodHandle sel_method = lookup_instance_method_in_klasses(recv_klass,
1441 resolved_method->name(),
1442 resolved_method->signature(), CHECK);
1443 if (sel_method.is_null() && !check_null_and_abstract) {
1444 // In theory this is a harmless placeholder value, but
1445 // in practice leaving in null affects the nsk default method tests.
1446 // This needs further study.
1447 sel_method = resolved_method;
1448 }
1449 // check if method exists
1450 if (sel_method.is_null()) {
1451 ResourceMark rm(THREAD);
1452 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1453 Method::name_and_sig_as_C_string(recv_klass,
1454 resolved_method->name(),
1455 resolved_method->signature()));
1456 }
1457 // check access
1458 // Throw Illegal Access Error if sel_method is not public.
1459 if (!sel_method->is_public()) {
1460 ResourceMark rm(THREAD);
1461 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1462 Method::name_and_sig_as_C_string(recv_klass,
1463 sel_method->name(),
1464 sel_method->signature()));
1465 }
1466 // check if abstract
1467 if (check_null_and_abstract && sel_method->is_abstract()) {
1468 ResourceMark rm(THREAD);
1469 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1470 Method::name_and_sig_as_C_string(recv_klass,
1471 sel_method->name(),
1472 sel_method->signature()));
1473 }
1474
1475 if (log_develop_is_enabled(Trace, itables)) {
1476 trace_method_resolution("invokeinterface selected method: receiver-class:",
1477 recv_klass, resolved_klass, sel_method, true);
1478 }
1479 // setup result
1480 if (!resolved_method->has_itable_index()) {
1481 int vtable_index = resolved_method->vtable_index();
1482 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1483 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1484 } else {
1485 int itable_index = resolved_method()->itable_index();
1486 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1487 }
1488 }
1489
1490
1491 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1492 const LinkInfo& link_info) {
1493 EXCEPTION_MARK;
1494 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1495 if (HAS_PENDING_EXCEPTION) {
1496 CLEAR_PENDING_EXCEPTION;
1497 return methodHandle();
1498 } else {
1499 return method_result;
1500 }
1501 }
1502
1503 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1504 const LinkInfo& link_info) {
1505 EXCEPTION_MARK;
1506 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1507 if (HAS_PENDING_EXCEPTION) {
1508 CLEAR_PENDING_EXCEPTION;
1509 return methodHandle();
1510 } else {
1511 return method_result;
1512 }
1513 }
1514
1515 methodHandle LinkResolver::resolve_virtual_call_or_null(
1516 Klass* receiver_klass,
1517 const LinkInfo& link_info) {
1518 EXCEPTION_MARK;
1519 CallInfo info;
1520 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1521 if (HAS_PENDING_EXCEPTION) {
1522 CLEAR_PENDING_EXCEPTION;
1523 return methodHandle();
1524 }
1525 return info.selected_method();
1526 }
1527
1528 methodHandle LinkResolver::resolve_interface_call_or_null(
1529 Klass* receiver_klass,
1530 const LinkInfo& link_info) {
1531 EXCEPTION_MARK;
1532 CallInfo info;
1533 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1534 if (HAS_PENDING_EXCEPTION) {
1535 CLEAR_PENDING_EXCEPTION;
1536 return methodHandle();
1537 }
1538 return info.selected_method();
1539 }
1540
1541 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1542 const LinkInfo& link_info) {
1543 EXCEPTION_MARK;
1544 CallInfo info;
1545 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1546 /*check_null_or_abstract*/false, THREAD);
1547 if (HAS_PENDING_EXCEPTION) {
1548 CLEAR_PENDING_EXCEPTION;
1549 return Method::invalid_vtable_index;
1550 }
1551 return info.vtable_index();
1552 }
1553
1554 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1555 EXCEPTION_MARK;
1556 CallInfo info;
1557 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1558 if (HAS_PENDING_EXCEPTION) {
1559 CLEAR_PENDING_EXCEPTION;
1560 return methodHandle();
1561 }
1562 return info.selected_method();
1563 }
1564
1565 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1566 EXCEPTION_MARK;
1567 CallInfo info;
1568 resolve_special_call(info, Handle(), link_info, THREAD);
1569 if (HAS_PENDING_EXCEPTION) {
1570 CLEAR_PENDING_EXCEPTION;
1571 return methodHandle();
1572 }
1573 return info.selected_method();
1574 }
1575
1576
1577
1578 //------------------------------------------------------------------------------------------------------------------------
1579 // ConstantPool entries
1580
1581 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1582 switch (byte) {
1583 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1584 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1585 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1586 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1587 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1588 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1589 default : break;
1590 }
1591 return;
1592 }
1593
1594 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1595 const methodHandle& attached_method,
1596 Bytecodes::Code byte, TRAPS) {
1597 Klass* defc = attached_method->method_holder();
1598 Symbol* name = attached_method->name();
1599 Symbol* type = attached_method->signature();
1600 LinkInfo link_info(defc, name, type);
1601 switch(byte) {
1602 case Bytecodes::_invokevirtual:
1603 resolve_virtual_call(result, recv, recv->klass(), link_info,
1604 /*check_null_and_abstract=*/true, CHECK);
1605 break;
1606 case Bytecodes::_invokeinterface:
1607 resolve_interface_call(result, recv, recv->klass(), link_info,
1608 /*check_null_and_abstract=*/true, CHECK);
1609 break;
1610 case Bytecodes::_invokestatic:
1611 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1612 break;
1613 case Bytecodes::_invokespecial:
1614 resolve_special_call(result, recv, link_info, CHECK);
1615 break;
1616 default:
1617 fatal("bad call: %s", Bytecodes::name(byte));
1618 break;
1619 }
1620 }
1621
1622 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1623 LinkInfo link_info(pool, index, CHECK);
1624 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1625 }
1626
1627
1628 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1629 const constantPoolHandle& pool, int index, TRAPS) {
1630 LinkInfo link_info(pool, index, CHECK);
1631 resolve_special_call(result, recv, link_info, CHECK);
1632 }
1633
1634
1635 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1636 const constantPoolHandle& pool, int index,
1637 TRAPS) {
1638
1639 LinkInfo link_info(pool, index, CHECK);
1640 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1641 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1642 }
1643
1644
1645 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1646 LinkInfo link_info(pool, index, CHECK);
1647 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1648 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1649 }
1650
1651
1652 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1653 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1654 LinkInfo link_info(pool, index, CHECK);
1655 if (TraceMethodHandles) {
1656 ResourceMark rm(THREAD);
1657 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1658 link_info.signature()->as_C_string());
1659 }
1660 resolve_handle_call(result, link_info, CHECK);
1661 }
1662
1663 void LinkResolver::resolve_handle_call(CallInfo& result,
1664 const LinkInfo& link_info,
1665 TRAPS) {
1666 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1667 Klass* resolved_klass = link_info.resolved_klass();
1668 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1669 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1670 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1671 Handle resolved_appendix;
1672 Handle resolved_method_type;
1673 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1674 &resolved_appendix, &resolved_method_type, CHECK);
1675 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1676 }
1677
1678 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1679 Symbol* method_name = pool->name_ref_at(index);
1680 Symbol* method_signature = pool->signature_ref_at(index);
1681 Klass* current_klass = pool->pool_holder();
1682
1683 // Resolve the bootstrap specifier (BSM + optional arguments).
1684 Handle bootstrap_specifier;
1685 // Check if CallSite has been bound already:
1686 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1687 int pool_index = cpce->constant_pool_index();
1688
1689 if (cpce->is_f1_null()) {
1690 if (cpce->indy_resolution_failed()) {
1691 ConstantPool::throw_resolution_error(pool,
1692 ResolutionErrorTable::encode_cpcache_index(index),
1693 CHECK);
1694 }
1695
1696 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1697 // reference to a method handle which will be the bootstrap method for a dynamic
1698 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1699 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1700 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1701 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1702 // this bootstrap method will encounter the resolution of MethodHandleInError.
1703 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1704 Exceptions::wrap_dynamic_exception(CHECK);
1705 assert(bsm_info != NULL, "");
1706 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1707 bootstrap_specifier = Handle(THREAD, bsm_info);
1708 }
1709 if (!cpce->is_f1_null()) {
1710 methodHandle method( THREAD, cpce->f1_as_method());
1711 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1712 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1713 result.set_handle(method, appendix, method_type, THREAD);
1714 Exceptions::wrap_dynamic_exception(CHECK);
1715 return;
1716 }
1717
1718 if (TraceMethodHandles) {
1719 ResourceMark rm(THREAD);
1720 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1721 ConstantPool::decode_invokedynamic_index(index),
1722 method_name->as_C_string(), method_signature->as_C_string(),
1723 current_klass->name()->as_C_string());
1724 tty->print(" BSM info: "); bootstrap_specifier->print();
1725 }
1726
1727 resolve_dynamic_call(result, pool_index, bootstrap_specifier, method_name,
1728 method_signature, current_klass, THREAD);
1729 if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1730 int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
1731 bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
1732 encoded_index,
1733 pool()->tag_at(pool_index),
1734 CHECK);
1735 if (!recorded_res_status) {
1736 // Another thread got here just before we did. So, either use the method
1737 // that it resolved or throw the LinkageError exception that it threw.
1738 if (!cpce->is_f1_null()) {
1739 methodHandle method( THREAD, cpce->f1_as_method());
1740 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1741 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1742 result.set_handle(method, appendix, method_type, THREAD);
1743 Exceptions::wrap_dynamic_exception(CHECK);
1744 } else {
1745 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
1746 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
1747 }
1748 return;
1749 }
1750 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
1751 }
1752 }
1753
1754 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1755 int pool_index,
1756 Handle bootstrap_specifier,
1757 Symbol* method_name, Symbol* method_signature,
1758 Klass* current_klass,
1759 TRAPS) {
1760 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1761 // The appendix argument is likely to be a freshly-created CallSite.
1762 Handle resolved_appendix;
1763 Handle resolved_method_type;
1764 methodHandle resolved_method =
1765 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1766 pool_index,
1767 bootstrap_specifier,
1768 method_name, method_signature,
1769 &resolved_appendix,
1770 &resolved_method_type,
1771 THREAD);
1772 Exceptions::wrap_dynamic_exception(CHECK);
1773 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1774 Exceptions::wrap_dynamic_exception(CHECK);
1775 }