1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/defaultMethods.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/resolutionErrors.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "compiler/compilationPolicy.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "gc/shared/collectedHeap.inline.hpp"
36 #include "interpreter/bootstrapInfo.hpp"
37 #include "interpreter/bytecode.hpp"
38 #include "interpreter/interpreterRuntime.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "logging/log.hpp"
41 #include "logging/logStream.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "oops/constantPool.hpp"
44 #include "oops/cpCache.inline.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/method.hpp"
47 #include "oops/objArrayKlass.hpp"
48 #include "oops/objArrayOop.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "prims/methodHandles.hpp"
51 #include "prims/nativeLookup.hpp"
52 #include "runtime/fieldDescriptor.inline.hpp"
53 #include "runtime/frame.inline.hpp"
54 #include "runtime/handles.inline.hpp"
55 #include "runtime/reflection.hpp"
56 #include "runtime/safepointVerifiers.hpp"
57 #include "runtime/signature.hpp"
58 #include "runtime/thread.inline.hpp"
59 #include "runtime/vmThread.hpp"
60
61 //------------------------------------------------------------------------------------------------------------------------
62 // Implementation of CallInfo
63
64
65 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
66 int vtable_index = Method::nonvirtual_vtable_index;
67 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
68 }
69
70
71 void CallInfo::set_interface(Klass* resolved_klass,
72 Klass* selected_klass,
73 const methodHandle& resolved_method,
74 const methodHandle& selected_method,
75 int itable_index, TRAPS) {
76 // This is only called for interface methods. If the resolved_method
77 // comes from java/lang/Object, it can be the subject of a virtual call, so
78 // we should pick the vtable index from the resolved method.
79 // In that case, the caller must call set_virtual instead of set_interface.
80 assert(resolved_method->method_holder()->is_interface(), "");
81 assert(itable_index == resolved_method()->itable_index(), "");
82 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
83 }
84
85 void CallInfo::set_virtual(Klass* resolved_klass,
86 Klass* selected_klass,
87 const methodHandle& resolved_method,
88 const methodHandle& selected_method,
89 int vtable_index, TRAPS) {
90 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
91 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
92 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
93 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
94 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
95 }
96
97 void CallInfo::set_handle(const methodHandle& resolved_method,
98 Handle resolved_appendix, TRAPS) {
99 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, CHECK);
100 }
101
102 void CallInfo::set_handle(Klass* resolved_klass,
103 const methodHandle& resolved_method,
104 Handle resolved_appendix, TRAPS) {
105 guarantee(resolved_method.not_null(), "resolved method is null");
106 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
107 resolved_method->is_compiled_lambda_form(),
108 "linkMethod must return one of these");
109 int vtable_index = Method::nonvirtual_vtable_index;
110 assert(!resolved_method->has_vtable_index(), "");
111 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
112 _resolved_appendix = resolved_appendix;
113 }
114
115 void CallInfo::set_common(Klass* resolved_klass,
116 Klass* selected_klass,
117 const methodHandle& resolved_method,
118 const methodHandle& selected_method,
119 CallKind kind,
120 int index,
121 TRAPS) {
122 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
123 _resolved_klass = resolved_klass;
124 _selected_klass = selected_klass;
125 _resolved_method = resolved_method;
126 _selected_method = selected_method;
127 _call_kind = kind;
128 _call_index = index;
129 _resolved_appendix = Handle();
130 DEBUG_ONLY(verify()); // verify before making side effects
131
132 CompilationPolicy::compile_if_required(selected_method, THREAD);
133 }
134
135 // utility query for unreflecting a method
136 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
137 Klass* resolved_method_holder = resolved_method->method_holder();
138 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
139 resolved_klass = resolved_method_holder;
140 }
141 _resolved_klass = resolved_klass;
142 _selected_klass = resolved_klass;
143 _resolved_method = methodHandle(THREAD, resolved_method);
144 _selected_method = methodHandle(THREAD, resolved_method);
145 // classify:
146 CallKind kind = CallInfo::unknown_kind;
147 int index = resolved_method->vtable_index();
148 if (resolved_method->can_be_statically_bound()) {
149 kind = CallInfo::direct_call;
150 } else if (!resolved_method_holder->is_interface()) {
151 // Could be an Object method inherited into an interface, but still a vtable call.
152 kind = CallInfo::vtable_call;
153 } else if (!resolved_klass->is_interface()) {
154 // A default or miranda method. Compute the vtable index.
155 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
156 _resolved_method);
157 assert(index >= 0 , "we should have valid vtable index at this point");
158
159 kind = CallInfo::vtable_call;
160 } else if (resolved_method->has_vtable_index()) {
161 // Can occur if an interface redeclares a method of Object.
162
163 #ifdef ASSERT
164 // Ensure that this is really the case.
165 Klass* object_klass = SystemDictionary::Object_klass();
166 Method * object_resolved_method = object_klass->vtable().method_at(index);
167 assert(object_resolved_method->name() == resolved_method->name(),
168 "Object and interface method names should match at vtable index %d, %s != %s",
169 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
170 assert(object_resolved_method->signature() == resolved_method->signature(),
171 "Object and interface method signatures should match at vtable index %d, %s != %s",
172 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
173 #endif // ASSERT
174
175 kind = CallInfo::vtable_call;
176 } else {
177 // A regular interface call.
178 kind = CallInfo::itable_call;
179 index = resolved_method->itable_index();
180 }
181 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
182 _call_kind = kind;
183 _call_index = index;
184 _resolved_appendix = Handle();
185 // Find or create a ResolvedMethod instance for this Method*
186 set_resolved_method_name(CHECK);
187
188 DEBUG_ONLY(verify());
189 }
190
191 void CallInfo::set_resolved_method_name(TRAPS) {
192 assert(_resolved_method() != NULL, "Should already have a Method*");
193 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(_resolved_method, CHECK);
194 _resolved_method_name = Handle(THREAD, rmethod_name);
195 }
196
197 #ifdef ASSERT
198 void CallInfo::verify() {
199 switch (call_kind()) { // the meaning and allowed value of index depends on kind
200 case CallInfo::direct_call:
201 if (_call_index == Method::nonvirtual_vtable_index) break;
202 // else fall through to check vtable index:
203 case CallInfo::vtable_call:
204 assert(resolved_klass()->verify_vtable_index(_call_index), "");
205 break;
206 case CallInfo::itable_call:
207 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
208 break;
209 case CallInfo::unknown_kind:
210 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
211 break;
212 default:
213 fatal("Unexpected call kind %d", call_kind());
214 }
215 }
216 #endif // ASSERT
217
218 #ifndef PRODUCT
219 void CallInfo::print() {
220 ResourceMark rm;
221 const char* kindstr;
222 switch (_call_kind) {
223 case direct_call: kindstr = "direct"; break;
224 case vtable_call: kindstr = "vtable"; break;
225 case itable_call: kindstr = "itable"; break;
226 default : kindstr = "unknown"; break;
227 }
228 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
229 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
230 }
231 #endif
232
233 //------------------------------------------------------------------------------------------------------------------------
234 // Implementation of LinkInfo
235
236 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
237 // resolve klass
238 _resolved_klass = pool->klass_ref_at(index, CHECK);
239
240 // Get name, signature, and static klass
241 _name = pool->name_ref_at(index);
242 _signature = pool->signature_ref_at(index);
243 _tag = pool->tag_ref_at(index);
244 _current_klass = pool->pool_holder();
245 _current_method = current_method;
246
247 // Coming from the constant pool always checks access
248 _check_access = true;
249 }
250
251 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
252 // resolve klass
253 _resolved_klass = pool->klass_ref_at(index, CHECK);
254
255 // Get name, signature, and static klass
256 _name = pool->name_ref_at(index);
257 _signature = pool->signature_ref_at(index);
258 _tag = pool->tag_ref_at(index);
259 _current_klass = pool->pool_holder();
260 _current_method = methodHandle();
261
262 // Coming from the constant pool always checks access
263 _check_access = true;
264 }
265
266 #ifndef PRODUCT
267 void LinkInfo::print() {
268 ResourceMark rm;
269 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
270 _resolved_klass->name()->as_C_string(),
271 _name->as_C_string(),
272 _signature->as_C_string(),
273 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
274 _check_access ? "true" : "false");
275 }
276 #endif // PRODUCT
277 //------------------------------------------------------------------------------------------------------------------------
278 // Klass resolution
279
280 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
281 bool fold_type_to_class, TRAPS) {
282 Klass* base_klass = sel_klass;
283 if (fold_type_to_class) {
284 if (sel_klass->is_objArray_klass()) {
285 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
286 }
287 // The element type could be a typeArray - we only need the access
288 // check if it is a reference to another class.
289 if (!base_klass->is_instance_klass()) {
290 return; // no relevant check to do
291 }
292 }
293 Reflection::VerifyClassAccessResults vca_result =
294 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
295 if (vca_result != Reflection::ACCESS_OK) {
296 ResourceMark rm(THREAD);
297 char* msg = Reflection::verify_class_access_msg(ref_klass,
298 InstanceKlass::cast(base_klass),
299 vca_result);
300 bool same_module = (base_klass->module() == ref_klass->module());
301 if (msg == NULL) {
302 Exceptions::fthrow(
303 THREAD_AND_LOCATION,
304 vmSymbols::java_lang_IllegalAccessError(),
305 "failed to access class %s from class %s (%s%s%s)",
306 base_klass->external_name(),
307 ref_klass->external_name(),
308 (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(),
309 (same_module) ? "" : "; ",
310 (same_module) ? "" : ref_klass->class_in_module_of_loader());
311 } else {
312 // Use module specific message returned by verify_class_access_msg().
313 Exceptions::fthrow(
314 THREAD_AND_LOCATION,
315 vmSymbols::java_lang_IllegalAccessError(),
316 "%s", msg);
317 }
318 }
319 }
320
321 //------------------------------------------------------------------------------------------------------------------------
322 // Method resolution
323 //
324 // According to JVM spec. $5.4.3c & $5.4.3d
325
326 // Look up method in klasses, including static methods
327 // Then look up local default methods
328 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
329 bool checkpolymorphism,
330 bool in_imethod_resolve) {
331 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
332
333 Klass* klass = link_info.resolved_klass();
334 Symbol* name = link_info.name();
335 Symbol* signature = link_info.signature();
336
337 // Ignore overpasses so statics can be found during resolution
338 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
339
340 if (klass->is_array_klass()) {
341 // Only consider klass and super klass for arrays
342 return result;
343 }
344
345 InstanceKlass* ik = InstanceKlass::cast(klass);
346
347 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
348 // ignore static and non-public methods of java.lang.Object,
349 // like clone, finalize, registerNatives.
350 if (in_imethod_resolve &&
351 result != NULL &&
352 ik->is_interface() &&
353 (result->is_static() || !result->is_public()) &&
354 result->method_holder() == SystemDictionary::Object_klass()) {
355 result = NULL;
356 }
357
358 // Before considering default methods, check for an overpass in the
359 // current class if a method has not been found.
360 if (result == NULL) {
361 result = ik->find_method(name, signature);
362 }
363
364 if (result == NULL) {
365 Array<Method*>* default_methods = ik->default_methods();
366 if (default_methods != NULL) {
367 result = InstanceKlass::find_method(default_methods, name, signature);
368 }
369 }
370
371 if (checkpolymorphism && result != NULL) {
372 vmIntrinsics::ID iid = result->intrinsic_id();
373 if (MethodHandles::is_signature_polymorphic(iid)) {
374 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
375 return NULL;
376 }
377 }
378 return result;
379 }
380
381 // returns first instance method
382 // Looks up method in classes, then looks up local default methods
383 Method* LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
384 Symbol* name,
385 Symbol* signature,
386 Klass::PrivateLookupMode private_mode, TRAPS) {
387 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
388
389 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
390 Klass* super_klass = result->method_holder()->super();
391 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
392 }
393
394 if (klass->is_array_klass()) {
395 // Only consider klass and super klass for arrays
396 return result;
397 }
398
399 if (result == NULL) {
400 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
401 if (default_methods != NULL) {
402 result = InstanceKlass::find_method(default_methods, name, signature);
403 assert(result == NULL || !result->is_static(), "static defaults not allowed");
404 }
405 }
406 return result;
407 }
408
409 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
410 const methodHandle& resolved_method) {
411
412 int vtable_index = Method::invalid_vtable_index;
413 Symbol* name = resolved_method->name();
414 Symbol* signature = resolved_method->signature();
415 InstanceKlass* ik = InstanceKlass::cast(klass);
416
417 // First check in default method array
418 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
419 int index = InstanceKlass::find_method_index(ik->default_methods(),
420 name, signature, Klass::find_overpass,
421 Klass::find_static, Klass::find_private);
422 if (index >= 0 ) {
423 vtable_index = ik->default_vtable_indices()->at(index);
424 }
425 }
426 if (vtable_index == Method::invalid_vtable_index) {
427 // get vtable_index for miranda methods
428 klassVtable vt = ik->vtable();
429 vtable_index = vt.index_of_miranda(name, signature);
430 }
431 return vtable_index;
432 }
433
434 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
435 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
436
437 // Specify 'true' in order to skip default methods when searching the
438 // interfaces. Function lookup_method_in_klasses() already looked for
439 // the method in the default methods table.
440 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
441 }
442
443 Method* LinkResolver::lookup_polymorphic_method(const LinkInfo& link_info,
444 Handle *appendix_result_or_null,
445 TRAPS) {
446 Klass* klass = link_info.resolved_klass();
447 Symbol* name = link_info.name();
448 Symbol* full_signature = link_info.signature();
449
450 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
451 if (TraceMethodHandles) {
452 ResourceMark rm(THREAD);
453 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
454 vmIntrinsics::name_at(iid), klass->external_name(),
455 name->as_C_string(), full_signature->as_C_string());
456 }
457 if ((klass == SystemDictionary::MethodHandle_klass() ||
458 klass == SystemDictionary::VarHandle_klass()) &&
459 iid != vmIntrinsics::_none) {
460 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
461 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
462 // Do not erase last argument type (MemberName) if it is a static linkTo method.
463 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
464 TempNewSymbol basic_signature =
465 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
466 if (TraceMethodHandles) {
467 ResourceMark rm(THREAD);
468 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
469 name->as_C_string(),
470 full_signature->as_C_string(),
471 basic_signature->as_C_string());
472 }
473 Method* result = SystemDictionary::find_method_handle_intrinsic(iid,
474 basic_signature,
475 CHECK_NULL);
476 if (result != NULL) {
477 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
478 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
479 assert(basic_signature == result->signature(), "predict the result signature");
480 if (TraceMethodHandles) {
481 ttyLocker ttyl;
482 tty->print("lookup_polymorphic_method => intrinsic ");
483 result->print_on(tty);
484 }
485 }
486 return result;
487 } else if (iid == vmIntrinsics::_invokeGeneric
488 && THREAD->can_call_java()
489 && appendix_result_or_null != NULL) {
490 // This is a method with type-checking semantics.
491 // We will ask Java code to spin an adapter method for it.
492 if (!MethodHandles::enabled()) {
493 // Make sure the Java part of the runtime has been booted up.
494 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
495 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
496 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
497 Handle(),
498 Handle(),
499 true,
500 CHECK_NULL);
501 }
502 }
503
504 Handle appendix;
505 Handle method_type;
506 Method* result = SystemDictionary::find_method_handle_invoker(
507 klass,
508 name,
509 full_signature,
510 link_info.current_klass(),
511 &appendix,
512 CHECK_NULL);
513 if (TraceMethodHandles) {
514 ttyLocker ttyl;
515 tty->print("lookup_polymorphic_method => (via Java) ");
516 result->print_on(tty);
517 tty->print(" lookup_polymorphic_method => appendix = ");
518 if (appendix.is_null()) tty->print_cr("(none)");
519 else appendix->print_on(tty);
520 }
521 if (result != NULL) {
522 #ifdef ASSERT
523 ResourceMark rm(THREAD);
524
525 TempNewSymbol basic_signature =
526 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
527 int actual_size_of_params = result->size_of_parameters();
528 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
529 // +1 for MethodHandle.this, +1 for trailing MethodType
530 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
531 if (appendix.not_null()) expected_size_of_params += 1;
532 if (actual_size_of_params != expected_size_of_params) {
533 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
534 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
535 result->print();
536 }
537 assert(actual_size_of_params == expected_size_of_params,
538 "%d != %d", actual_size_of_params, expected_size_of_params);
539 #endif //ASSERT
540
541 assert(appendix_result_or_null != NULL, "");
542 (*appendix_result_or_null) = appendix;
543 }
544 return result;
545 }
546 }
547 return NULL;
548 }
549
550 void LinkResolver::check_method_accessability(Klass* ref_klass,
551 Klass* resolved_klass,
552 Klass* sel_klass,
553 const methodHandle& sel_method,
554 TRAPS) {
555
556 AccessFlags flags = sel_method->access_flags();
557
558 // Special case: arrays always override "clone". JVMS 2.15.
559 // If the resolved klass is an array class, and the declaring class
560 // is java.lang.Object and the method is "clone", set the flags
561 // to public.
562 //
563 // We'll check for the method name first, as that's most likely
564 // to be false (so we'll short-circuit out of these tests).
565 if (sel_method->name() == vmSymbols::clone_name() &&
566 sel_klass == SystemDictionary::Object_klass() &&
567 resolved_klass->is_array_klass()) {
568 // We need to change "protected" to "public".
569 assert(flags.is_protected(), "clone not protected?");
570 jint new_flags = flags.as_int();
571 new_flags = new_flags & (~JVM_ACC_PROTECTED);
572 new_flags = new_flags | JVM_ACC_PUBLIC;
573 flags.set_flags(new_flags);
574 }
575 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
576
577 bool can_access = Reflection::verify_member_access(ref_klass,
578 resolved_klass,
579 sel_klass,
580 flags,
581 true, false, CHECK);
582 // Any existing exceptions that may have been thrown, for example LinkageErrors
583 // from nest-host resolution, have been allowed to propagate.
584 if (!can_access) {
585 ResourceMark rm(THREAD);
586 bool same_module = (sel_klass->module() == ref_klass->module());
587 Exceptions::fthrow(
588 THREAD_AND_LOCATION,
589 vmSymbols::java_lang_IllegalAccessError(),
590 "class %s tried to access %s%s%smethod '%s' (%s%s%s)",
591 ref_klass->external_name(),
592 sel_method->is_abstract() ? "abstract " : "",
593 sel_method->is_protected() ? "protected " : "",
594 sel_method->is_private() ? "private " : "",
595 sel_method->external_name(),
596 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
597 (same_module) ? "" : "; ",
598 (same_module) ? "" : sel_klass->class_in_module_of_loader()
599 );
600 return;
601 }
602 }
603
604 Method* LinkResolver::resolve_method_statically(Bytecodes::Code code,
605 const constantPoolHandle& pool, int index, TRAPS) {
606 // This method is used only
607 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
608 // and
609 // (2) in Bytecode_invoke::static_target
610 // It appears to fail when applied to an invokeinterface call site.
611 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
612 // resolve klass
613 if (code == Bytecodes::_invokedynamic) {
614 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
615 Symbol* method_name = vmSymbols::invoke_name();
616 Symbol* method_signature = pool->signature_ref_at(index);
617 Klass* current_klass = pool->pool_holder();
618 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
619 return resolve_method(link_info, code, THREAD);
620 }
621
622 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
623 Klass* resolved_klass = link_info.resolved_klass();
624
625 if (pool->has_preresolution()
626 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
627 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
628 Method* result = ConstantPool::method_at_if_loaded(pool, index);
629 if (result != NULL) {
630 return result;
631 }
632 }
633
634 if (code == Bytecodes::_invokeinterface) {
635 return resolve_interface_method(link_info, code, THREAD);
636 } else if (code == Bytecodes::_invokevirtual) {
637 return resolve_method(link_info, code, THREAD);
638 } else if (!resolved_klass->is_interface()) {
639 return resolve_method(link_info, code, THREAD);
640 } else {
641 return resolve_interface_method(link_info, code, THREAD);
642 }
643 }
644
645 // Check and print a loader constraint violation message for method or interface method
646 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
647 const methodHandle& resolved_method,
648 const char* method_type, TRAPS) {
649 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
650 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
651
652 ResourceMark rm(THREAD);
653 Symbol* failed_type_symbol =
654 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
655 resolved_loader, true, CHECK);
656 if (failed_type_symbol != NULL) {
657 Klass* current_class = link_info.current_klass();
658 ClassLoaderData* current_loader_data = current_class->class_loader_data();
659 assert(current_loader_data != NULL, "current class has no class loader data");
660 Klass* resolved_method_class = resolved_method->method_holder();
661 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
662 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
663
664 stringStream ss;
665 ss.print("loader constraint violation: when resolving %s '", method_type);
666 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
667 ss.print("' the class loader %s of the current class, %s,"
668 " and the class loader %s for the method's defining class, %s, have"
669 " different Class objects for the type %s used in the signature (%s; %s)",
670 current_loader_data->loader_name_and_id(),
671 current_class->name()->as_C_string(),
672 target_loader_data->loader_name_and_id(),
673 resolved_method_class->name()->as_C_string(),
674 failed_type_symbol->as_C_string(),
675 current_class->class_in_module_of_loader(false, true),
676 resolved_method_class->class_in_module_of_loader(false, true));
677 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
678 }
679 }
680
681 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
682 Klass* current_klass,
683 Klass* sel_klass, TRAPS) {
684 Handle ref_loader(THREAD, current_klass->class_loader());
685 Handle sel_loader(THREAD, sel_klass->class_loader());
686
687 ResourceMark rm(THREAD); // needed for check_signature_loaders
688 Symbol* failed_type_symbol =
689 SystemDictionary::check_signature_loaders(sig,
690 ref_loader, sel_loader,
691 false,
692 CHECK);
693 if (failed_type_symbol != NULL) {
694 stringStream ss;
695 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
696
697 ss.print("loader constraint violation: when resolving field \"%s\" of type %s, "
698 "the class loader %s of the current class, %s, "
699 "and the class loader %s for the field's defining %s, %s, "
700 "have different Class objects for type %s (%s; %s)",
701 field->as_C_string(),
702 failed_type_name,
703 current_klass->class_loader_data()->loader_name_and_id(),
704 current_klass->external_name(),
705 sel_klass->class_loader_data()->loader_name_and_id(),
706 sel_klass->external_kind(),
707 sel_klass->external_name(),
708 failed_type_name,
709 current_klass->class_in_module_of_loader(false, true),
710 sel_klass->class_in_module_of_loader(false, true));
711 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
712 }
713 }
714
715 Method* LinkResolver::resolve_method(const LinkInfo& link_info,
716 Bytecodes::Code code, TRAPS) {
717
718 Handle nested_exception;
719 Klass* resolved_klass = link_info.resolved_klass();
720
721 // 1. For invokevirtual, cannot call an interface method
722 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
723 ResourceMark rm(THREAD);
724 char buf[200];
725 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
726 resolved_klass->external_name());
727 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
728 }
729
730 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
731 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
732 ResourceMark rm(THREAD);
733 stringStream ss;
734 ss.print("Method '");
735 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
736 ss.print("' must be Methodref constant");
737 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
738 }
739
740 // 3. lookup method in resolved klass and its super klasses
741 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
742
743 // 4. lookup method in all the interfaces implemented by the resolved klass
744 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
745 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
746
747 if (resolved_method.is_null()) {
748 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
749 Method* method = lookup_polymorphic_method(link_info, (Handle*)NULL, THREAD);
750 resolved_method = methodHandle(THREAD, method);
751 if (HAS_PENDING_EXCEPTION) {
752 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
753 CLEAR_PENDING_EXCEPTION;
754 }
755 }
756 }
757
758 // 5. method lookup failed
759 if (resolved_method.is_null()) {
760 ResourceMark rm(THREAD);
761 stringStream ss;
762 ss.print("'");
763 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
764 ss.print("'");
765 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
766 ss.as_string(), nested_exception, NULL);
767 }
768
769 // 6. access checks, access checking may be turned off when calling from within the VM.
770 Klass* current_klass = link_info.current_klass();
771 if (link_info.check_access()) {
772 assert(current_klass != NULL , "current_klass should not be null");
773
774 // check if method can be accessed by the referring class
775 check_method_accessability(current_klass,
776 resolved_klass,
777 resolved_method->method_holder(),
778 resolved_method,
779 CHECK_NULL);
780
781 // check loader constraints
782 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
783 }
784
785 return resolved_method();
786 }
787
788 static void trace_method_resolution(const char* prefix,
789 Klass* klass,
790 Klass* resolved_klass,
791 Method* method,
792 bool logitables,
793 int index = -1) {
794 #ifndef PRODUCT
795 ResourceMark rm;
796 Log(itables) logi;
797 LogStream lsi(logi.trace());
798 Log(vtables) logv;
799 LogStream lsv(logv.trace());
800 outputStream* st;
801 if (logitables) {
802 st = &lsi;
803 } else {
804 st = &lsv;
805 }
806 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
807 prefix,
808 (klass == NULL ? "<NULL>" : klass->internal_name()),
809 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
810 Method::name_and_sig_as_C_string(resolved_klass,
811 method->name(),
812 method->signature()),
813 method->method_holder()->internal_name());
814 method->print_linkage_flags(st);
815 if (index != -1) {
816 st->print("vtable_index:%d", index);
817 }
818 st->cr();
819 #endif // PRODUCT
820 }
821
822 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
823 Method* LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
824
825 Klass* resolved_klass = link_info.resolved_klass();
826
827 // check if klass is interface
828 if (!resolved_klass->is_interface()) {
829 ResourceMark rm(THREAD);
830 char buf[200];
831 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
832 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
833 }
834
835 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
836 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
837 ResourceMark rm(THREAD);
838 stringStream ss;
839 ss.print("Method '");
840 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
841 ss.print("' must be InterfaceMethodref constant");
842 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
843 }
844
845 // lookup method in this interface or its super, java.lang.Object
846 // JDK8: also look for static methods
847 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
848
849 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
850 // lookup method in all the super-interfaces
851 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
852 }
853
854 if (resolved_method.is_null()) {
855 // no method found
856 ResourceMark rm(THREAD);
857 stringStream ss;
858 ss.print("'");
859 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
860 ss.print("'");
861 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
862 }
863
864 if (link_info.check_access()) {
865 // JDK8 adds non-public interface methods, and accessability check requirement
866 Klass* current_klass = link_info.current_klass();
867
868 assert(current_klass != NULL , "current_klass should not be null");
869
870 // check if method can be accessed by the referring class
871 check_method_accessability(current_klass,
872 resolved_klass,
873 resolved_method->method_holder(),
874 resolved_method,
875 CHECK_NULL);
876
877 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
878 }
879
880 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
881 ResourceMark rm(THREAD);
882 stringStream ss;
883 ss.print("Expected instance not static method '");
884 Method::print_external_name(&ss, resolved_klass,
885 resolved_method->name(), resolved_method->signature());
886 ss.print("'");
887 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
888 }
889
890 if (log_develop_is_enabled(Trace, itables)) {
891 char buf[200];
892 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
893 Bytecodes::name(code));
894 trace_method_resolution(buf, link_info.current_klass(), resolved_klass, resolved_method(), true);
895 }
896
897 return resolved_method();
898 }
899
900 //------------------------------------------------------------------------------------------------------------------------
901 // Field resolution
902
903 void LinkResolver::check_field_accessability(Klass* ref_klass,
904 Klass* resolved_klass,
905 Klass* sel_klass,
906 const fieldDescriptor& fd,
907 TRAPS) {
908 bool can_access = Reflection::verify_member_access(ref_klass,
909 resolved_klass,
910 sel_klass,
911 fd.access_flags(),
912 true, false, CHECK);
913 // Any existing exceptions that may have been thrown, for example LinkageErrors
914 // from nest-host resolution, have been allowed to propagate.
915 if (!can_access) {
916 bool same_module = (sel_klass->module() == ref_klass->module());
917 ResourceMark rm(THREAD);
918 Exceptions::fthrow(
919 THREAD_AND_LOCATION,
920 vmSymbols::java_lang_IllegalAccessError(),
921 "class %s tried to access %s%sfield %s.%s (%s%s%s)",
922 ref_klass->external_name(),
923 fd.is_protected() ? "protected " : "",
924 fd.is_private() ? "private " : "",
925 sel_klass->external_name(),
926 fd.name()->as_C_string(),
927 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
928 (same_module) ? "" : "; ",
929 (same_module) ? "" : sel_klass->class_in_module_of_loader()
930 );
931 return;
932 }
933 }
934
935 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
936 LinkInfo link_info(pool, index, method, CHECK);
937 resolve_field(fd, link_info, byte, true, CHECK);
938 }
939
940 void LinkResolver::resolve_field(fieldDescriptor& fd,
941 const LinkInfo& link_info,
942 Bytecodes::Code byte, bool initialize_class,
943 TRAPS) {
944 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
945 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
946 byte == Bytecodes::_withfield ||
947 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
948 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
949
950 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
951 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic ||
952 byte == Bytecodes::_nofast_putfield || byte == Bytecodes::_withfield);
953 // Check if there's a resolved klass containing the field
954 Klass* resolved_klass = link_info.resolved_klass();
955 Symbol* field = link_info.name();
956 Symbol* sig = link_info.signature();
957
958 if (resolved_klass == NULL) {
959 ResourceMark rm(THREAD);
960 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
961 }
962
963 // Resolve instance field
964 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
965 // check if field exists; i.e., if a klass containing the field def has been selected
966 if (sel_klass == NULL) {
967 ResourceMark rm(THREAD);
968 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
969 }
970
971 // Access checking may be turned off when calling from within the VM.
972 Klass* current_klass = link_info.current_klass();
973 if (link_info.check_access()) {
974
975 // check access
976 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
977
978 // check for errors
979 if (is_static != fd.is_static()) {
980 ResourceMark rm(THREAD);
981 char msg[200];
982 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
983 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
984 }
985
986 // A final field can be modified only
987 // (1) by methods declared in the class declaring the field and
988 // (2) by the <clinit> method (in case of a static field)
989 // or by the <init> method (in case of an instance field).
990 // (3) by withfield when field is in a value type and the
991 // selected class and current class are nest mates.
992 if (is_put && fd.access_flags().is_final()) {
993 ResourceMark rm(THREAD);
994 stringStream ss;
995
996 if (sel_klass != current_klass) {
997 // If byte code is a withfield check if they are nestmates.
998 bool are_nestmates = false;
999 if (sel_klass->is_instance_klass() &&
1000 InstanceKlass::cast(sel_klass)->is_value() &&
1001 current_klass->is_instance_klass()) {
1002 are_nestmates = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(
1003 InstanceKlass::cast(sel_klass), THREAD);
1004 }
1005 if (!are_nestmates) {
1006 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1007 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1008 current_klass->external_name());
1009 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1010 }
1011 }
1012
1013 if (fd.constants()->pool_holder()->major_version() >= 53) {
1014 Method* m = link_info.current_method();
1015 assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
1016 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1017 fd.is_static() &&
1018 !m->is_class_initializer());
1019 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1020 !fd.is_static() &&
1021 !m->is_object_constructor());
1022
1023 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1024 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1025 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1026 m->name()->as_C_string(),
1027 is_static ? "<clinit>" : "<init>");
1028 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1029 }
1030 }
1031 }
1032
1033 // initialize resolved_klass if necessary
1034 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1035 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1036 //
1037 // note 2: we don't want to force initialization if we are just checking
1038 // if the field access is legal; e.g., during compilation
1039 if (is_static && initialize_class) {
1040 sel_klass->initialize(CHECK);
1041 }
1042 }
1043
1044 if ((sel_klass != current_klass) && (current_klass != NULL)) {
1045 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1046 }
1047
1048 // return information. note that the klass is set to the actual klass containing the
1049 // field, otherwise access of static fields in superclasses will not work.
1050 }
1051
1052
1053 //------------------------------------------------------------------------------------------------------------------------
1054 // Invoke resolution
1055 //
1056 // Naming conventions:
1057 //
1058 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1059 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1060 // resolved_klass the specified klass (i.e., specified via constant pool index)
1061 // recv_klass the receiver klass
1062
1063
1064 void LinkResolver::resolve_static_call(CallInfo& result,
1065 const LinkInfo& link_info,
1066 bool initialize_class, TRAPS) {
1067 Method* resolved_method = linktime_resolve_static_method(link_info, CHECK);
1068
1069 // The resolved class can change as a result of this resolution.
1070 Klass* resolved_klass = resolved_method->method_holder();
1071
1072 // Initialize klass (this should only happen if everything is ok)
1073 if (initialize_class && resolved_klass->should_be_initialized()) {
1074 resolved_klass->initialize(CHECK);
1075 // Use updated LinkInfo to reresolve with resolved method holder
1076 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1077 link_info.current_klass(),
1078 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1079 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1080 }
1081
1082 // setup result
1083 result.set_static(resolved_klass, methodHandle(THREAD, resolved_method), CHECK);
1084 }
1085
1086 // throws linktime exceptions
1087 Method* LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1088
1089 Klass* resolved_klass = link_info.resolved_klass();
1090 Method* resolved_method;
1091 if (!resolved_klass->is_interface()) {
1092 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1093 } else {
1094 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1095 }
1096 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1097
1098 // check if static
1099 if (!resolved_method->is_static()) {
1100 ResourceMark rm(THREAD);
1101 stringStream ss;
1102 ss.print("Expected static method '");
1103 resolved_method->print_external_name(&ss);
1104 ss.print("'");
1105 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1106 }
1107 return resolved_method;
1108 }
1109
1110
1111 void LinkResolver::resolve_special_call(CallInfo& result,
1112 Handle recv,
1113 const LinkInfo& link_info,
1114 TRAPS) {
1115 Method* resolved_method = linktime_resolve_special_method(link_info, CHECK);
1116 runtime_resolve_special_method(result, link_info, methodHandle(THREAD, resolved_method), recv, CHECK);
1117 }
1118
1119 // throws linktime exceptions
1120 Method* LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, TRAPS) {
1121
1122 // Invokespecial is called for multiple special reasons:
1123 // <init>
1124 // local private method invocation, for classes and interfaces
1125 // superclass.method, which can also resolve to a default method
1126 // and the selected method is recalculated relative to the direct superclass
1127 // superinterface.method, which explicitly does not check shadowing
1128 Klass* resolved_klass = link_info.resolved_klass();
1129 Method* resolved_method;
1130
1131 if (!resolved_klass->is_interface()) {
1132 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1133 } else {
1134 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1135 }
1136
1137 // check if method name is <init>, that it is found in same klass as static type
1138 // Since this method is never inherited from a super, any appearance here under
1139 // the wrong class would be an error.
1140 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1141 resolved_method->method_holder() != resolved_klass) {
1142 ResourceMark rm(THREAD);
1143 stringStream ss;
1144 ss.print("%s: method '", resolved_klass->external_name());
1145 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1146 ss.print(" %s(", resolved_method->name()->as_C_string());
1147 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1148 ss.print(")' not found");
1149 Exceptions::fthrow(
1150 THREAD_AND_LOCATION,
1151 vmSymbols::java_lang_NoSuchMethodError(),
1152 "%s", ss.as_string());
1153 return NULL;
1154 }
1155
1156 // ensure that invokespecial's interface method reference is in
1157 // a direct superinterface, not an indirect superinterface
1158 Klass* current_klass = link_info.current_klass();
1159 if (current_klass != NULL && resolved_klass->is_interface()) {
1160 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1161 InstanceKlass *klass_to_check = !ck->is_unsafe_anonymous() ?
1162 ck :
1163 ck->unsafe_anonymous_host();
1164 // Disable verification for the dynamically-generated reflection bytecodes.
1165 bool is_reflect = klass_to_check->is_subclass_of(
1166 SystemDictionary::reflect_MagicAccessorImpl_klass());
1167
1168 if (!is_reflect &&
1169 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1170 ResourceMark rm(THREAD);
1171 stringStream ss;
1172 ss.print("Interface method reference: '");
1173 resolved_method->print_external_name(&ss);
1174 ss.print("', is in an indirect superinterface of %s",
1175 current_klass->external_name());
1176 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1177 }
1178 }
1179
1180 // check if not static
1181 if (resolved_method->is_static()) {
1182 ResourceMark rm(THREAD);
1183 stringStream ss;
1184 ss.print("Expecting non-static method '");
1185 resolved_method->print_external_name(&ss);
1186 ss.print("'");
1187 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1188 }
1189
1190 if (log_develop_is_enabled(Trace, itables)) {
1191 trace_method_resolution("invokespecial resolved method: caller-class:",
1192 current_klass, resolved_klass, resolved_method, true);
1193 }
1194
1195 return resolved_method;
1196 }
1197
1198 // throws runtime exceptions
1199 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1200 const LinkInfo& link_info,
1201 const methodHandle& resolved_method,
1202 Handle recv, TRAPS) {
1203
1204 Klass* resolved_klass = link_info.resolved_klass();
1205
1206 // resolved method is selected method unless we have an old-style lookup
1207 // for a superclass method
1208 // Invokespecial for a superinterface, resolved method is selected method,
1209 // no checks for shadowing
1210 methodHandle sel_method(THREAD, resolved_method());
1211
1212 if (link_info.check_access() &&
1213 // check if the method is not <init>, which is never inherited
1214 resolved_method->name() != vmSymbols::object_initializer_name()) {
1215
1216 Klass* current_klass = link_info.current_klass();
1217
1218 // Check if the class of the resolved_klass is a superclass
1219 // (not supertype in order to exclude interface classes) of the current class.
1220 // This check is not performed for super.invoke for interface methods
1221 // in super interfaces.
1222 if (current_klass->is_subclass_of(resolved_klass) &&
1223 current_klass != resolved_klass) {
1224 // Lookup super method
1225 Klass* super_klass = current_klass->super();
1226 Method* instance_method = lookup_instance_method_in_klasses(super_klass,
1227 resolved_method->name(),
1228 resolved_method->signature(),
1229 Klass::find_private, CHECK);
1230 sel_method = methodHandle(THREAD, instance_method);
1231
1232 // check if found
1233 if (sel_method.is_null()) {
1234 ResourceMark rm(THREAD);
1235 stringStream ss;
1236 ss.print("'");
1237 resolved_method->print_external_name(&ss);
1238 ss.print("'");
1239 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1240 // check loader constraints if found a different method
1241 } else if (sel_method() != resolved_method()) {
1242 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1243 }
1244 }
1245
1246 // Check that the class of objectref (the receiver) is the current class or interface,
1247 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1248 // throws IllegalAccessError.
1249 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1250 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1251 // a class. If the sender is an interface, the check has to be performed at runtime.
1252 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1253 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1254 if (sender->is_interface() && recv.not_null()) {
1255 Klass* receiver_klass = recv->klass();
1256 if (!receiver_klass->is_subtype_of(sender)) {
1257 ResourceMark rm(THREAD);
1258 char buf[500];
1259 jio_snprintf(buf, sizeof(buf),
1260 "Receiver class %s must be the current class or a subtype of interface %s",
1261 receiver_klass->external_name(),
1262 sender->external_name());
1263 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1264 }
1265 }
1266 }
1267
1268 // check if not static
1269 if (sel_method->is_static()) {
1270 ResourceMark rm(THREAD);
1271 stringStream ss;
1272 ss.print("Expecting non-static method '");
1273 resolved_method->print_external_name(&ss);
1274 ss.print("'");
1275 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1276 }
1277
1278 // check if abstract
1279 if (sel_method->is_abstract()) {
1280 ResourceMark rm(THREAD);
1281 stringStream ss;
1282 ss.print("'");
1283 Method::print_external_name(&ss, resolved_klass, sel_method->name(), sel_method->signature());
1284 ss.print("'");
1285 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1286 }
1287
1288 if (log_develop_is_enabled(Trace, itables)) {
1289 trace_method_resolution("invokespecial selected method: resolved-class:",
1290 resolved_klass, resolved_klass, sel_method(), true);
1291 }
1292
1293 // setup result
1294 result.set_static(resolved_klass, sel_method, CHECK);
1295 }
1296
1297 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1298 const LinkInfo& link_info,
1299 bool check_null_and_abstract, TRAPS) {
1300 Method* resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1301 runtime_resolve_virtual_method(result, methodHandle(THREAD, resolved_method),
1302 link_info.resolved_klass(),
1303 recv, receiver_klass,
1304 check_null_and_abstract, CHECK);
1305 }
1306
1307 // throws linktime exceptions
1308 Method* LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1309 TRAPS) {
1310 // normal method resolution
1311 Method* resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1312
1313 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1314 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1315
1316 // check if private interface method
1317 Klass* resolved_klass = link_info.resolved_klass();
1318 Klass* current_klass = link_info.current_klass();
1319
1320 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1321 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1322 ResourceMark rm(THREAD);
1323 stringStream ss;
1324 ss.print("private interface method requires invokespecial, not invokevirtual: method '");
1325 resolved_method->print_external_name(&ss);
1326 ss.print("', caller-class: %s",
1327 (current_klass == NULL ? "<null>" : current_klass->internal_name()));
1328 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1329 }
1330
1331 // check if not static
1332 if (resolved_method->is_static()) {
1333 ResourceMark rm(THREAD);
1334 stringStream ss;
1335 ss.print("Expecting non-static method '");
1336 resolved_method->print_external_name(&ss);
1337 ss.print("'");
1338 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1339 }
1340
1341 if (log_develop_is_enabled(Trace, vtables)) {
1342 trace_method_resolution("invokevirtual resolved method: caller-class:",
1343 current_klass, resolved_klass, resolved_method, false);
1344 }
1345
1346 return resolved_method;
1347 }
1348
1349 // throws runtime exceptions
1350 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1351 const methodHandle& resolved_method,
1352 Klass* resolved_klass,
1353 Handle recv,
1354 Klass* recv_klass,
1355 bool check_null_and_abstract,
1356 TRAPS) {
1357
1358 // setup default return values
1359 int vtable_index = Method::invalid_vtable_index;
1360 methodHandle selected_method;
1361
1362 // runtime method resolution
1363 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1364 THROW(vmSymbols::java_lang_NullPointerException());
1365 }
1366
1367 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1368 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1369 // a missing receiver might result in a bogus lookup.
1370 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1371
1372 // do lookup based on receiver klass using the vtable index
1373 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1374 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1375 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1376
1377 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1378 } else {
1379 // at this point we are sure that resolved_method is virtual and not
1380 // a default or miranda method; therefore, it must have a valid vtable index.
1381 assert(!resolved_method->has_itable_index(), "");
1382 vtable_index = resolved_method->vtable_index();
1383 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1384 // methods, or for final methods. Private methods never appear in the vtable
1385 // and never override other methods. As an optimization, final methods are
1386 // never put in the vtable, unless they override an existing method.
1387 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1388 // resolved method, and it can never be changed by an override.
1389 if (vtable_index == Method::nonvirtual_vtable_index) {
1390 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1391 selected_method = resolved_method;
1392 } else {
1393 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1394 }
1395 }
1396
1397 // check if method exists
1398 if (selected_method.is_null()) {
1399 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1400 }
1401
1402 // check if abstract
1403 if (check_null_and_abstract && selected_method->is_abstract()) {
1404 // Pass arguments for generating a verbose error message.
1405 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1406 }
1407
1408 if (log_develop_is_enabled(Trace, vtables)) {
1409 trace_method_resolution("invokevirtual selected method: receiver-class:",
1410 recv_klass, resolved_klass, selected_method(),
1411 false, vtable_index);
1412 }
1413 // setup result
1414 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1415 }
1416
1417 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1418 const LinkInfo& link_info,
1419 bool check_null_and_abstract, TRAPS) {
1420 // throws linktime exceptions
1421 Method* resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1422 methodHandle mh(THREAD, resolved_method);
1423 runtime_resolve_interface_method(result, mh, link_info.resolved_klass(),
1424 recv, recv_klass, check_null_and_abstract, CHECK);
1425 }
1426
1427 Method* LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1428 TRAPS) {
1429 // normal interface method resolution
1430 Method* resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1431 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1432 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1433
1434 return resolved_method;
1435 }
1436
1437 // throws runtime exceptions
1438 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1439 const methodHandle& resolved_method,
1440 Klass* resolved_klass,
1441 Handle recv,
1442 Klass* recv_klass,
1443 bool check_null_and_abstract, TRAPS) {
1444
1445 // check if receiver exists
1446 if (check_null_and_abstract && recv.is_null()) {
1447 THROW(vmSymbols::java_lang_NullPointerException());
1448 }
1449
1450 // check if receiver klass implements the resolved interface
1451 if (!recv_klass->is_subtype_of(resolved_klass)) {
1452 ResourceMark rm(THREAD);
1453 char buf[200];
1454 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1455 recv_klass->external_name(),
1456 resolved_klass->external_name());
1457 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1458 }
1459
1460 methodHandle selected_method = resolved_method;
1461
1462 // resolve the method in the receiver class, unless it is private
1463 if (!resolved_method()->is_private()) {
1464 // do lookup based on receiver klass
1465 // This search must match the linktime preparation search for itable initialization
1466 // to correctly enforce loader constraints for interface method inheritance.
1467 // Private methods are skipped as the resolved method was not private.
1468 Method* method = lookup_instance_method_in_klasses(recv_klass,
1469 resolved_method->name(),
1470 resolved_method->signature(),
1471 Klass::skip_private, CHECK);
1472 selected_method = methodHandle(THREAD, method);
1473
1474 if (selected_method.is_null() && !check_null_and_abstract) {
1475 // In theory this is a harmless placeholder value, but
1476 // in practice leaving in null affects the nsk default method tests.
1477 // This needs further study.
1478 selected_method = resolved_method;
1479 }
1480 // check if method exists
1481 if (selected_method.is_null()) {
1482 // Pass arguments for generating a verbose error message.
1483 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1484 }
1485 // check access
1486 // Throw Illegal Access Error if selected_method is not public.
1487 if (!selected_method->is_public()) {
1488 ResourceMark rm(THREAD);
1489 stringStream ss;
1490 ss.print("'");
1491 Method::print_external_name(&ss, recv_klass, selected_method->name(), selected_method->signature());
1492 ss.print("'");
1493 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1494 }
1495 // check if abstract
1496 if (check_null_and_abstract && selected_method->is_abstract()) {
1497 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1498 }
1499 }
1500
1501 if (log_develop_is_enabled(Trace, itables)) {
1502 trace_method_resolution("invokeinterface selected method: receiver-class:",
1503 recv_klass, resolved_klass, selected_method(), true);
1504 }
1505 // setup result
1506 if (resolved_method->has_vtable_index()) {
1507 int vtable_index = resolved_method->vtable_index();
1508 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1509 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1510 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1511 } else if (resolved_method->has_itable_index()) {
1512 int itable_index = resolved_method()->itable_index();
1513 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1514 result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
1515 } else {
1516 int index = resolved_method->vtable_index();
1517 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1518 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1519 assert(resolved_method()->is_private() ||
1520 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1521 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1522 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1523 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1524 result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, index, CHECK);
1525 }
1526 }
1527
1528
1529 Method* LinkResolver::linktime_resolve_interface_method_or_null(
1530 const LinkInfo& link_info) {
1531 EXCEPTION_MARK;
1532 Method* method_result = linktime_resolve_interface_method(link_info, THREAD);
1533 if (HAS_PENDING_EXCEPTION) {
1534 CLEAR_PENDING_EXCEPTION;
1535 return NULL;
1536 } else {
1537 return method_result;
1538 }
1539 }
1540
1541 Method* LinkResolver::linktime_resolve_virtual_method_or_null(
1542 const LinkInfo& link_info) {
1543 EXCEPTION_MARK;
1544 Method* method_result = linktime_resolve_virtual_method(link_info, THREAD);
1545 if (HAS_PENDING_EXCEPTION) {
1546 CLEAR_PENDING_EXCEPTION;
1547 return NULL;
1548 } else {
1549 return method_result;
1550 }
1551 }
1552
1553 Method* LinkResolver::resolve_virtual_call_or_null(
1554 Klass* receiver_klass,
1555 const LinkInfo& link_info) {
1556 EXCEPTION_MARK;
1557 CallInfo info;
1558 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1559 if (HAS_PENDING_EXCEPTION) {
1560 CLEAR_PENDING_EXCEPTION;
1561 return NULL;
1562 }
1563 return info.selected_method();
1564 }
1565
1566 Method* LinkResolver::resolve_interface_call_or_null(
1567 Klass* receiver_klass,
1568 const LinkInfo& link_info) {
1569 EXCEPTION_MARK;
1570 CallInfo info;
1571 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1572 if (HAS_PENDING_EXCEPTION) {
1573 CLEAR_PENDING_EXCEPTION;
1574 return NULL;
1575 }
1576 return info.selected_method();
1577 }
1578
1579 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1580 const LinkInfo& link_info) {
1581 EXCEPTION_MARK;
1582 CallInfo info;
1583 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1584 /*check_null_or_abstract*/false, THREAD);
1585 if (HAS_PENDING_EXCEPTION) {
1586 CLEAR_PENDING_EXCEPTION;
1587 return Method::invalid_vtable_index;
1588 }
1589 return info.vtable_index();
1590 }
1591
1592 Method* LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1593 EXCEPTION_MARK;
1594 CallInfo info;
1595 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1596 if (HAS_PENDING_EXCEPTION) {
1597 CLEAR_PENDING_EXCEPTION;
1598 return NULL;
1599 }
1600 return info.selected_method();
1601 }
1602
1603 Method* LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1604 EXCEPTION_MARK;
1605 CallInfo info;
1606 resolve_special_call(info, Handle(), link_info, THREAD);
1607 if (HAS_PENDING_EXCEPTION) {
1608 CLEAR_PENDING_EXCEPTION;
1609 return NULL;
1610 }
1611 return info.selected_method();
1612 }
1613
1614
1615
1616 //------------------------------------------------------------------------------------------------------------------------
1617 // ConstantPool entries
1618
1619 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1620 switch (byte) {
1621 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1622 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1623 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1624 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1625 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1626 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1627 default : break;
1628 }
1629 return;
1630 }
1631
1632 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1633 const methodHandle& attached_method,
1634 Bytecodes::Code byte, TRAPS) {
1635 Klass* defc = attached_method->method_holder();
1636 Symbol* name = attached_method->name();
1637 Symbol* type = attached_method->signature();
1638 LinkInfo link_info(defc, name, type);
1639 switch(byte) {
1640 case Bytecodes::_invokevirtual:
1641 resolve_virtual_call(result, recv, recv->klass(), link_info,
1642 /*check_null_and_abstract=*/true, CHECK);
1643 break;
1644 case Bytecodes::_invokeinterface:
1645 resolve_interface_call(result, recv, recv->klass(), link_info,
1646 /*check_null_and_abstract=*/true, CHECK);
1647 break;
1648 case Bytecodes::_invokestatic:
1649 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1650 break;
1651 case Bytecodes::_invokespecial:
1652 resolve_special_call(result, recv, link_info, CHECK);
1653 break;
1654 default:
1655 fatal("bad call: %s", Bytecodes::name(byte));
1656 break;
1657 }
1658 }
1659
1660 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1661 LinkInfo link_info(pool, index, CHECK);
1662 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1663 }
1664
1665
1666 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1667 const constantPoolHandle& pool, int index, TRAPS) {
1668 LinkInfo link_info(pool, index, CHECK);
1669 resolve_special_call(result, recv, link_info, CHECK);
1670 }
1671
1672
1673 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1674 const constantPoolHandle& pool, int index,
1675 TRAPS) {
1676
1677 LinkInfo link_info(pool, index, CHECK);
1678 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1679 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1680 }
1681
1682
1683 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1684 LinkInfo link_info(pool, index, CHECK);
1685 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1686 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1687 }
1688
1689
1690 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1691 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1692 LinkInfo link_info(pool, index, CHECK);
1693 if (TraceMethodHandles) {
1694 ResourceMark rm(THREAD);
1695 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1696 link_info.signature()->as_C_string());
1697 }
1698 resolve_handle_call(result, link_info, CHECK);
1699 }
1700
1701 void LinkResolver::resolve_handle_call(CallInfo& result,
1702 const LinkInfo& link_info,
1703 TRAPS) {
1704 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1705 Klass* resolved_klass = link_info.resolved_klass();
1706 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1707 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1708 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1709 Handle resolved_appendix;
1710 Method* resolved_method = lookup_polymorphic_method(link_info, &resolved_appendix, CHECK);
1711 result.set_handle(resolved_klass, methodHandle(THREAD, resolved_method), resolved_appendix, CHECK);
1712 }
1713
1714 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int indy_index, TRAPS) {
1715 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(indy_index);
1716 int pool_index = cpce->constant_pool_index();
1717
1718 // Resolve the bootstrap specifier (BSM + optional arguments).
1719 BootstrapInfo bootstrap_specifier(pool, pool_index, indy_index);
1720
1721 // Check if CallSite has been bound already or failed already, and short circuit:
1722 {
1723 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1724 if (is_done) return;
1725 }
1726
1727 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1728 // reference to a method handle which will be the bootstrap method for a dynamic
1729 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1730 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1731 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1732 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1733 // this bootstrap method will encounter the resolution of MethodHandleInError.
1734
1735 resolve_dynamic_call(result, bootstrap_specifier, CHECK);
1736
1737 if (TraceMethodHandles) {
1738 bootstrap_specifier.print_msg_on(tty, "resolve_invokedynamic");
1739 }
1740
1741 // The returned linkage result is provisional up to the moment
1742 // the interpreter or runtime performs a serialized check of
1743 // the relevant CPCE::f1 field. This is done by the caller
1744 // of this method, via CPCE::set_dynamic_call, which uses
1745 // an ObjectLocker to do the final serialization of updates
1746 // to CPCE state, including f1.
1747 }
1748
1749 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1750 BootstrapInfo& bootstrap_specifier,
1751 TRAPS) {
1752 // JSR 292: this must resolve to an implicitly generated method
1753 // such as MH.linkToCallSite(*...) or some other call-site shape.
1754 // The appendix argument is likely to be a freshly-created CallSite.
1755 // It may also be a MethodHandle from an unwrapped ConstantCallSite,
1756 // or any other reference. The resolved_method as well as the appendix
1757 // are both recorded together via CallInfo::set_handle.
1758 SystemDictionary::invoke_bootstrap_method(bootstrap_specifier, THREAD);
1759 Exceptions::wrap_dynamic_exception(THREAD);
1760
1761 if (HAS_PENDING_EXCEPTION) {
1762 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1763 // Let any random low-level IE or SOE or OOME just bleed through.
1764 // Basically we pretend that the bootstrap method was never called,
1765 // if it fails this way: We neither record a successful linkage,
1766 // nor do we memorize a LE for posterity.
1767 return;
1768 }
1769 // JVMS 5.4.3 says: If an attempt by the Java Virtual Machine to resolve
1770 // a symbolic reference fails because an error is thrown that is an
1771 // instance of LinkageError (or a subclass), then subsequent attempts to
1772 // resolve the reference always fail with the same error that was thrown
1773 // as a result of the initial resolution attempt.
1774 bool recorded_res_status = bootstrap_specifier.save_and_throw_indy_exc(CHECK);
1775 if (!recorded_res_status) {
1776 // Another thread got here just before we did. So, either use the method
1777 // that it resolved or throw the LinkageError exception that it threw.
1778 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1779 if (is_done) return;
1780 }
1781 assert(bootstrap_specifier.invokedynamic_cp_cache_entry()->indy_resolution_failed(),
1782 "Resolution failure flag wasn't set");
1783 }
1784
1785 bootstrap_specifier.resolve_newly_linked_invokedynamic(result, CHECK);
1786 // Exceptions::wrap_dynamic_exception not used because
1787 // set_handle doesn't throw linkage errors
1788 }
1789
1790 // Selected method is abstract.
1791 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1792 const methodHandle& selected_method,
1793 Klass *recv_klass, TRAPS) {
1794 Klass *resolved_klass = resolved_method->method_holder();
1795 ResourceMark rm(THREAD);
1796 stringStream ss;
1797
1798 if (recv_klass != NULL) {
1799 ss.print("Receiver class %s does not define or inherit an "
1800 "implementation of the",
1801 recv_klass->external_name());
1802 } else {
1803 ss.print("Missing implementation of");
1804 }
1805
1806 assert(resolved_method.not_null(), "Sanity");
1807 ss.print(" resolved method '%s%s",
1808 resolved_method->is_abstract() ? "abstract " : "",
1809 resolved_method->is_private() ? "private " : "");
1810 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1811 ss.print(" %s(", resolved_method->name()->as_C_string());
1812 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1813 ss.print(")' of %s %s.",
1814 resolved_klass->external_kind(),
1815 resolved_klass->external_name());
1816
1817 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1818 ss.print(" Selected method is '%s%s",
1819 selected_method->is_abstract() ? "abstract " : "",
1820 selected_method->is_private() ? "private " : "");
1821 selected_method->print_external_name(&ss);
1822 ss.print("'.");
1823 }
1824
1825 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1826 }