1 /*
2 * Copyright (c) 1997, 2020, 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_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
68 }
69
70
71 void CallInfo::set_interface(Klass* resolved_klass,
72 const methodHandle& resolved_method,
73 const methodHandle& selected_method,
74 int itable_index, TRAPS) {
75 // This is only called for interface methods. If the resolved_method
76 // comes from java/lang/Object, it can be the subject of a virtual call, so
77 // we should pick the vtable index from the resolved method.
78 // In that case, the caller must call set_virtual instead of set_interface.
79 assert(resolved_method->method_holder()->is_interface(), "");
80 assert(itable_index == resolved_method()->itable_index(), "");
81 set_common(resolved_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
82 }
83
84 void CallInfo::set_virtual(Klass* resolved_klass,
85 const methodHandle& resolved_method,
86 const methodHandle& selected_method,
87 int vtable_index, TRAPS) {
88 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
89 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
90 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
91 set_common(resolved_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
92 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
93 }
94
95 void CallInfo::set_handle(const methodHandle& resolved_method,
96 Handle resolved_appendix, TRAPS) {
97 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, CHECK);
98 }
99
100 void CallInfo::set_handle(Klass* resolved_klass,
101 const methodHandle& resolved_method,
102 Handle resolved_appendix, TRAPS) {
103 guarantee(resolved_method.not_null(), "resolved method is null");
104 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
105 resolved_method->is_compiled_lambda_form(),
106 "linkMethod must return one of these");
107 int vtable_index = Method::nonvirtual_vtable_index;
108 assert(!resolved_method->has_vtable_index(), "");
109 set_common(resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
110 _resolved_appendix = resolved_appendix;
111 }
112
113 void CallInfo::set_common(Klass* resolved_klass,
114 const methodHandle& resolved_method,
115 const methodHandle& selected_method,
116 CallKind kind,
117 int index,
118 TRAPS) {
119 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
120 _resolved_klass = resolved_klass;
121 _resolved_method = resolved_method;
122 _selected_method = selected_method;
123 _call_kind = kind;
124 _call_index = index;
125 _resolved_appendix = Handle();
126 DEBUG_ONLY(verify()); // verify before making side effects
127
128 CompilationPolicy::compile_if_required(selected_method, THREAD);
129 }
130
131 // utility query for unreflecting a method
132 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
133 Klass* resolved_method_holder = resolved_method->method_holder();
134 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
135 resolved_klass = resolved_method_holder;
136 }
137 _resolved_klass = resolved_klass;
138 _resolved_method = methodHandle(THREAD, resolved_method);
139 _selected_method = methodHandle(THREAD, resolved_method);
140 // classify:
141 CallKind kind = CallInfo::unknown_kind;
142 int index = resolved_method->vtable_index();
143 if (resolved_method->can_be_statically_bound()) {
144 kind = CallInfo::direct_call;
145 } else if (!resolved_method_holder->is_interface()) {
146 // Could be an Object method inherited into an interface, but still a vtable call.
147 kind = CallInfo::vtable_call;
148 } else if (!resolved_klass->is_interface()) {
149 // A default or miranda method. Compute the vtable index.
150 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
151 _resolved_method);
152 assert(index >= 0 , "we should have valid vtable index at this point");
153
154 kind = CallInfo::vtable_call;
155 } else if (resolved_method->has_vtable_index()) {
156 // Can occur if an interface redeclares a method of Object.
157
158 #ifdef ASSERT
159 // Ensure that this is really the case.
160 Klass* object_klass = SystemDictionary::Object_klass();
161 Method * object_resolved_method = object_klass->vtable().method_at(index);
162 assert(object_resolved_method->name() == resolved_method->name(),
163 "Object and interface method names should match at vtable index %d, %s != %s",
164 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
165 assert(object_resolved_method->signature() == resolved_method->signature(),
166 "Object and interface method signatures should match at vtable index %d, %s != %s",
167 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
168 #endif // ASSERT
169
170 kind = CallInfo::vtable_call;
171 } else {
172 // A regular interface call.
173 kind = CallInfo::itable_call;
174 index = resolved_method->itable_index();
175 }
176 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
177 _call_kind = kind;
178 _call_index = index;
179 _resolved_appendix = Handle();
180 // Find or create a ResolvedMethod instance for this Method*
181 set_resolved_method_name(CHECK);
182
183 DEBUG_ONLY(verify());
184 }
185
186 void CallInfo::set_resolved_method_name(TRAPS) {
187 assert(_resolved_method() != NULL, "Should already have a Method*");
188 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(_resolved_method, CHECK);
189 _resolved_method_name = Handle(THREAD, rmethod_name);
190 }
191
192 #ifdef ASSERT
193 void CallInfo::verify() {
194 switch (call_kind()) { // the meaning and allowed value of index depends on kind
195 case CallInfo::direct_call:
196 if (_call_index == Method::nonvirtual_vtable_index) break;
197 // else fall through to check vtable index:
198 case CallInfo::vtable_call:
199 assert(resolved_klass()->verify_vtable_index(_call_index), "");
200 break;
201 case CallInfo::itable_call:
202 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
203 break;
204 case CallInfo::unknown_kind:
205 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
206 break;
207 default:
208 fatal("Unexpected call kind %d", call_kind());
209 }
210 }
211 #endif // ASSERT
212
213 #ifndef PRODUCT
214 void CallInfo::print() {
215 ResourceMark rm;
216 const char* kindstr;
217 switch (_call_kind) {
218 case direct_call: kindstr = "direct"; break;
219 case vtable_call: kindstr = "vtable"; break;
220 case itable_call: kindstr = "itable"; break;
221 default : kindstr = "unknown"; break;
222 }
223 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
224 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
225 }
226 #endif
227
228 //------------------------------------------------------------------------------------------------------------------------
229 // Implementation of LinkInfo
230
231 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
232 // resolve klass
233 _resolved_klass = pool->klass_ref_at(index, CHECK);
234
235 // Get name, signature, and static klass
236 _name = pool->name_ref_at(index);
237 _signature = pool->signature_ref_at(index);
238 _tag = pool->tag_ref_at(index);
239 _current_klass = pool->pool_holder();
240 _current_method = current_method;
241
242 // Coming from the constant pool always checks access
243 _check_access = true;
244 }
245
246 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
247 // resolve klass
248 _resolved_klass = pool->klass_ref_at(index, CHECK);
249
250 // Get name, signature, and static klass
251 _name = pool->name_ref_at(index);
252 _signature = pool->signature_ref_at(index);
253 _tag = pool->tag_ref_at(index);
254 _current_klass = pool->pool_holder();
255 _current_method = methodHandle();
256
257 // Coming from the constant pool always checks access
258 _check_access = true;
259 }
260
261 #ifndef PRODUCT
262 void LinkInfo::print() {
263 ResourceMark rm;
264 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
265 _resolved_klass->name()->as_C_string(),
266 _name->as_C_string(),
267 _signature->as_C_string(),
268 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
269 _check_access ? "true" : "false");
270 }
271 #endif // PRODUCT
272 //------------------------------------------------------------------------------------------------------------------------
273 // Klass resolution
274
275 void LinkResolver::check_klass_accessibility(Klass* ref_klass, Klass* sel_klass, TRAPS) {
276 Klass* base_klass = sel_klass;
277 if (sel_klass->is_objArray_klass()) {
278 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
279 }
280 // The element type could be a typeArray - we only need the access
281 // check if it is a reference to another class.
282 if (!base_klass->is_instance_klass()) {
283 return; // no relevant check to do
284 }
285
286 Reflection::VerifyClassAccessResults vca_result =
287 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
288 if (vca_result != Reflection::ACCESS_OK) {
289 ResourceMark rm(THREAD);
290 char* msg = Reflection::verify_class_access_msg(ref_klass,
291 InstanceKlass::cast(base_klass),
292 vca_result);
293 bool same_module = (base_klass->module() == ref_klass->module());
294 if (msg == NULL) {
295 Exceptions::fthrow(
296 THREAD_AND_LOCATION,
297 vmSymbols::java_lang_IllegalAccessError(),
298 "failed to access class %s from class %s (%s%s%s)",
299 base_klass->external_name(),
300 ref_klass->external_name(),
301 (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(),
302 (same_module) ? "" : "; ",
303 (same_module) ? "" : ref_klass->class_in_module_of_loader());
304 } else {
305 // Use module specific message returned by verify_class_access_msg().
306 Exceptions::fthrow(
307 THREAD_AND_LOCATION,
308 vmSymbols::java_lang_IllegalAccessError(),
309 "%s", msg);
310 }
311 }
312 }
313
314 //------------------------------------------------------------------------------------------------------------------------
315 // Method resolution
316 //
317 // According to JVM spec. $5.4.3c & $5.4.3d
318
319 // Look up method in klasses, including static methods
320 // Then look up local default methods
321 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
322 bool checkpolymorphism,
323 bool in_imethod_resolve) {
324 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
325
326 Klass* klass = link_info.resolved_klass();
327 Symbol* name = link_info.name();
328 Symbol* signature = link_info.signature();
329
330 // Ignore overpasses so statics can be found during resolution
331 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
332
333 if (klass->is_array_klass()) {
334 // Only consider klass and super klass for arrays
335 return result;
336 }
337
338 InstanceKlass* ik = InstanceKlass::cast(klass);
339
340 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
341 // ignore static and non-public methods of java.lang.Object,
342 // like clone, finalize, registerNatives.
343 if (in_imethod_resolve &&
344 result != NULL &&
345 ik->is_interface() &&
346 (result->is_static() || !result->is_public()) &&
347 result->method_holder() == SystemDictionary::Object_klass()) {
348 result = NULL;
349 }
350
351 // Before considering default methods, check for an overpass in the
352 // current class if a method has not been found.
353 if (result == NULL) {
354 result = ik->find_method(name, signature);
355 }
356
357 if (result == NULL) {
358 Array<Method*>* default_methods = ik->default_methods();
359 if (default_methods != NULL) {
360 result = InstanceKlass::find_method(default_methods, name, signature);
361 }
362 }
363
364 if (checkpolymorphism && result != NULL) {
365 vmIntrinsics::ID iid = result->intrinsic_id();
366 if (MethodHandles::is_signature_polymorphic(iid)) {
367 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
368 return NULL;
369 }
370 }
371 return result;
372 }
373
374 // returns first instance method
375 // Looks up method in classes, then looks up local default methods
376 Method* LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
377 Symbol* name,
378 Symbol* signature,
379 Klass::PrivateLookupMode private_mode, TRAPS) {
380 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
381
382 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
383 Klass* super_klass = result->method_holder()->super();
384 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
385 }
386
387 if (klass->is_array_klass()) {
388 // Only consider klass and super klass for arrays
389 return result;
390 }
391
392 if (result == NULL) {
393 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
394 if (default_methods != NULL) {
395 result = InstanceKlass::find_method(default_methods, name, signature);
396 assert(result == NULL || !result->is_static(), "static defaults not allowed");
397 }
398 }
399 return result;
400 }
401
402 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
403 const methodHandle& resolved_method) {
404
405 int vtable_index = Method::invalid_vtable_index;
406 Symbol* name = resolved_method->name();
407 Symbol* signature = resolved_method->signature();
408 InstanceKlass* ik = InstanceKlass::cast(klass);
409
410 // First check in default method array
411 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
412 int index = InstanceKlass::find_method_index(ik->default_methods(),
413 name, signature, Klass::find_overpass,
414 Klass::find_static, Klass::find_private);
415 if (index >= 0 ) {
416 vtable_index = ik->default_vtable_indices()->at(index);
417 }
418 }
419 if (vtable_index == Method::invalid_vtable_index) {
420 // get vtable_index for miranda methods
421 klassVtable vt = ik->vtable();
422 vtable_index = vt.index_of_miranda(name, signature);
423 }
424 return vtable_index;
425 }
426
427 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
428 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
429
430 // Specify 'true' in order to skip default methods when searching the
431 // interfaces. Function lookup_method_in_klasses() already looked for
432 // the method in the default methods table.
433 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
434 }
435
436 Method* LinkResolver::lookup_polymorphic_method(const LinkInfo& link_info,
437 Handle *appendix_result_or_null,
438 TRAPS) {
439 Klass* klass = link_info.resolved_klass();
440 Symbol* name = link_info.name();
441 Symbol* full_signature = link_info.signature();
442
443 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
444 if (TraceMethodHandles) {
445 ResourceMark rm(THREAD);
446 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
447 vmIntrinsics::name_at(iid), klass->external_name(),
448 name->as_C_string(), full_signature->as_C_string());
449 }
450 if ((klass == SystemDictionary::MethodHandle_klass() ||
451 klass == SystemDictionary::VarHandle_klass()) &&
452 iid != vmIntrinsics::_none) {
453 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
454 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
455 // Do not erase last argument type (MemberName) if it is a static linkTo method.
456 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
457 TempNewSymbol basic_signature =
458 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
459 if (TraceMethodHandles) {
460 ResourceMark rm(THREAD);
461 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
462 name->as_C_string(),
463 full_signature->as_C_string(),
464 basic_signature->as_C_string());
465 }
466 Method* result = SystemDictionary::find_method_handle_intrinsic(iid,
467 basic_signature,
468 CHECK_NULL);
469 if (result != NULL) {
470 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
471 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
472 assert(basic_signature == result->signature(), "predict the result signature");
473 if (TraceMethodHandles) {
474 ttyLocker ttyl;
475 tty->print("lookup_polymorphic_method => intrinsic ");
476 result->print_on(tty);
477 }
478 }
479 return result;
480 } else if (iid == vmIntrinsics::_invokeGeneric
481 && THREAD->can_call_java()
482 && appendix_result_or_null != NULL) {
483 // This is a method with type-checking semantics.
484 // We will ask Java code to spin an adapter method for it.
485 if (!MethodHandles::enabled()) {
486 // Make sure the Java part of the runtime has been booted up.
487 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
488 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
489 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
490 Handle(),
491 Handle(),
492 true,
493 CHECK_NULL);
494 }
495 }
496
497 Handle appendix;
498 Handle method_type;
499 Method* result = SystemDictionary::find_method_handle_invoker(
500 klass,
501 name,
502 full_signature,
503 link_info.current_klass(),
504 &appendix,
505 CHECK_NULL);
506 if (TraceMethodHandles) {
507 ttyLocker ttyl;
508 tty->print("lookup_polymorphic_method => (via Java) ");
509 result->print_on(tty);
510 tty->print(" lookup_polymorphic_method => appendix = ");
511 if (appendix.is_null()) tty->print_cr("(none)");
512 else appendix->print_on(tty);
513 }
514 if (result != NULL) {
515 #ifdef ASSERT
516 ResourceMark rm(THREAD);
517
518 TempNewSymbol basic_signature =
519 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
520 int actual_size_of_params = result->size_of_parameters();
521 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
522 // +1 for MethodHandle.this, +1 for trailing MethodType
523 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
524 if (appendix.not_null()) expected_size_of_params += 1;
525 if (actual_size_of_params != expected_size_of_params) {
526 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
527 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
528 result->print();
529 }
530 assert(actual_size_of_params == expected_size_of_params,
531 "%d != %d", actual_size_of_params, expected_size_of_params);
532 #endif //ASSERT
533
534 assert(appendix_result_or_null != NULL, "");
535 (*appendix_result_or_null) = appendix;
536 }
537 return result;
538 }
539 }
540 return NULL;
541 }
542
543 void LinkResolver::check_method_accessability(Klass* ref_klass,
544 Klass* resolved_klass,
545 Klass* sel_klass,
546 const methodHandle& sel_method,
547 TRAPS) {
548
549 AccessFlags flags = sel_method->access_flags();
550
551 // Special case: arrays always override "clone". JVMS 2.15.
552 // If the resolved klass is an array class, and the declaring class
553 // is java.lang.Object and the method is "clone", set the flags
554 // to public.
555 //
556 // We'll check for the method name first, as that's most likely
557 // to be false (so we'll short-circuit out of these tests).
558 if (sel_method->name() == vmSymbols::clone_name() &&
559 sel_klass == SystemDictionary::Object_klass() &&
560 resolved_klass->is_array_klass()) {
561 // We need to change "protected" to "public".
562 assert(flags.is_protected(), "clone not protected?");
563 jint new_flags = flags.as_int();
564 new_flags = new_flags & (~JVM_ACC_PROTECTED);
565 new_flags = new_flags | JVM_ACC_PUBLIC;
566 flags.set_flags(new_flags);
567 }
568 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
569
570 bool can_access = Reflection::verify_member_access(ref_klass,
571 resolved_klass,
572 sel_klass,
573 flags,
574 true, false, CHECK);
575 // Any existing exceptions that may have been thrown, for example LinkageErrors
576 // from nest-host resolution, have been allowed to propagate.
577 if (!can_access) {
578 ResourceMark rm(THREAD);
579 bool same_module = (sel_klass->module() == ref_klass->module());
580 Exceptions::fthrow(
581 THREAD_AND_LOCATION,
582 vmSymbols::java_lang_IllegalAccessError(),
583 "class %s tried to access %s%s%smethod '%s' (%s%s%s)",
584 ref_klass->external_name(),
585 sel_method->is_abstract() ? "abstract " : "",
586 sel_method->is_protected() ? "protected " : "",
587 sel_method->is_private() ? "private " : "",
588 sel_method->external_name(),
589 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
590 (same_module) ? "" : "; ",
591 (same_module) ? "" : sel_klass->class_in_module_of_loader()
592 );
593 return;
594 }
595 }
596
597 Method* LinkResolver::resolve_method_statically(Bytecodes::Code code,
598 const constantPoolHandle& pool, int index, TRAPS) {
599 // This method is used only
600 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
601 // and
602 // (2) in Bytecode_invoke::static_target
603 // It appears to fail when applied to an invokeinterface call site.
604 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
605 // resolve klass
606 if (code == Bytecodes::_invokedynamic) {
607 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
608 Symbol* method_name = vmSymbols::invoke_name();
609 Symbol* method_signature = pool->signature_ref_at(index);
610 Klass* current_klass = pool->pool_holder();
611 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
612 return resolve_method(link_info, code, THREAD);
613 }
614
615 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
616 Klass* resolved_klass = link_info.resolved_klass();
617
618 if (pool->has_preresolution()
619 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
620 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
621 Method* result = ConstantPool::method_at_if_loaded(pool, index);
622 if (result != NULL) {
623 return result;
624 }
625 }
626
627 if (code == Bytecodes::_invokeinterface) {
628 return resolve_interface_method(link_info, code, THREAD);
629 } else if (code == Bytecodes::_invokevirtual) {
630 return resolve_method(link_info, code, THREAD);
631 } else if (!resolved_klass->is_interface()) {
632 return resolve_method(link_info, code, THREAD);
633 } else {
634 return resolve_interface_method(link_info, code, THREAD);
635 }
636 }
637
638 // Check and print a loader constraint violation message for method or interface method
639 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
640 const methodHandle& resolved_method,
641 const char* method_type, TRAPS) {
642 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
643 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
644
645 ResourceMark rm(THREAD);
646 Symbol* failed_type_symbol =
647 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
648 resolved_loader, true, CHECK);
649 if (failed_type_symbol != NULL) {
650 Klass* current_class = link_info.current_klass();
651 ClassLoaderData* current_loader_data = current_class->class_loader_data();
652 assert(current_loader_data != NULL, "current class has no class loader data");
653 Klass* resolved_method_class = resolved_method->method_holder();
654 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
655 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
656
657 stringStream ss;
658 ss.print("loader constraint violation: when resolving %s '", method_type);
659 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
660 ss.print("' the class loader %s of the current class, %s,"
661 " and the class loader %s for the method's defining class, %s, have"
662 " different Class objects for the type %s used in the signature (%s; %s)",
663 current_loader_data->loader_name_and_id(),
664 current_class->name()->as_C_string(),
665 target_loader_data->loader_name_and_id(),
666 resolved_method_class->name()->as_C_string(),
667 failed_type_symbol->as_C_string(),
668 current_class->class_in_module_of_loader(false, true),
669 resolved_method_class->class_in_module_of_loader(false, true));
670 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
671 }
672 }
673
674 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
675 Klass* current_klass,
676 Klass* sel_klass, TRAPS) {
677 Handle ref_loader(THREAD, current_klass->class_loader());
678 Handle sel_loader(THREAD, sel_klass->class_loader());
679
680 ResourceMark rm(THREAD); // needed for check_signature_loaders
681 Symbol* failed_type_symbol =
682 SystemDictionary::check_signature_loaders(sig,
683 ref_loader, sel_loader,
684 false,
685 CHECK);
686 if (failed_type_symbol != NULL) {
687 stringStream ss;
688 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
689
690 ss.print("loader constraint violation: when resolving field \"%s\" of type %s, "
691 "the class loader %s of the current class, %s, "
692 "and the class loader %s for the field's defining %s, %s, "
693 "have different Class objects for type %s (%s; %s)",
694 field->as_C_string(),
695 failed_type_name,
696 current_klass->class_loader_data()->loader_name_and_id(),
697 current_klass->external_name(),
698 sel_klass->class_loader_data()->loader_name_and_id(),
699 sel_klass->external_kind(),
700 sel_klass->external_name(),
701 failed_type_name,
702 current_klass->class_in_module_of_loader(false, true),
703 sel_klass->class_in_module_of_loader(false, true));
704 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
705 }
706 }
707
708 Method* LinkResolver::resolve_method(const LinkInfo& link_info,
709 Bytecodes::Code code, TRAPS) {
710
711 Handle nested_exception;
712 Klass* resolved_klass = link_info.resolved_klass();
713
714 // 1. For invokevirtual, cannot call an interface method
715 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
716 ResourceMark rm(THREAD);
717 char buf[200];
718 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
719 resolved_klass->external_name());
720 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
721 }
722
723 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
724 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
725 ResourceMark rm(THREAD);
726 stringStream ss;
727 ss.print("Method '");
728 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
729 ss.print("' must be Methodref constant");
730 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
731 }
732
733 // 3. lookup method in resolved klass and its super klasses
734 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
735
736 // 4. lookup method in all the interfaces implemented by the resolved klass
737 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
738 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
739
740 if (resolved_method.is_null()) {
741 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
742 Method* method = lookup_polymorphic_method(link_info, (Handle*)NULL, THREAD);
743 resolved_method = methodHandle(THREAD, method);
744 if (HAS_PENDING_EXCEPTION) {
745 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
746 CLEAR_PENDING_EXCEPTION;
747 }
748 }
749 }
750
751 // 5. method lookup failed
752 if (resolved_method.is_null()) {
753 ResourceMark rm(THREAD);
754 stringStream ss;
755 ss.print("'");
756 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
757 ss.print("'");
758 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
759 ss.as_string(), nested_exception, NULL);
760 }
761
762 // 6. access checks, access checking may be turned off when calling from within the VM.
763 Klass* current_klass = link_info.current_klass();
764 if (link_info.check_access()) {
765 assert(current_klass != NULL , "current_klass should not be null");
766
767 // check if method can be accessed by the referring class
768 check_method_accessability(current_klass,
769 resolved_klass,
770 resolved_method->method_holder(),
771 resolved_method,
772 CHECK_NULL);
773
774 // check loader constraints
775 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
776 }
777
778 return resolved_method();
779 }
780
781 static void trace_method_resolution(const char* prefix,
782 Klass* klass,
783 Klass* resolved_klass,
784 Method* method,
785 bool logitables,
786 int index = -1) {
787 #ifndef PRODUCT
788 ResourceMark rm;
789 Log(itables) logi;
790 LogStream lsi(logi.trace());
791 Log(vtables) logv;
792 LogStream lsv(logv.trace());
793 outputStream* st;
794 if (logitables) {
795 st = &lsi;
796 } else {
797 st = &lsv;
798 }
799 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
800 prefix,
801 (klass == NULL ? "<NULL>" : klass->internal_name()),
802 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
803 Method::name_and_sig_as_C_string(resolved_klass,
804 method->name(),
805 method->signature()),
806 method->method_holder()->internal_name());
807 method->print_linkage_flags(st);
808 if (index != -1) {
809 st->print("vtable_index:%d", index);
810 }
811 st->cr();
812 #endif // PRODUCT
813 }
814
815 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
816 Method* LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
817
818 Klass* resolved_klass = link_info.resolved_klass();
819
820 // check if klass is interface
821 if (!resolved_klass->is_interface()) {
822 ResourceMark rm(THREAD);
823 char buf[200];
824 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
825 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
826 }
827
828 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
829 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
830 ResourceMark rm(THREAD);
831 stringStream ss;
832 ss.print("Method '");
833 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
834 ss.print("' must be InterfaceMethodref constant");
835 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
836 }
837
838 // lookup method in this interface or its super, java.lang.Object
839 // JDK8: also look for static methods
840 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
841
842 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
843 // lookup method in all the super-interfaces
844 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
845 }
846
847 if (resolved_method.is_null()) {
848 // no method found
849 ResourceMark rm(THREAD);
850 stringStream ss;
851 ss.print("'");
852 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
853 ss.print("'");
854 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
855 }
856
857 if (link_info.check_access()) {
858 // JDK8 adds non-public interface methods, and accessability check requirement
859 Klass* current_klass = link_info.current_klass();
860
861 assert(current_klass != NULL , "current_klass should not be null");
862
863 // check if method can be accessed by the referring class
864 check_method_accessability(current_klass,
865 resolved_klass,
866 resolved_method->method_holder(),
867 resolved_method,
868 CHECK_NULL);
869
870 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
871 }
872
873 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
874 ResourceMark rm(THREAD);
875 stringStream ss;
876 ss.print("Expected instance not static method '");
877 Method::print_external_name(&ss, resolved_klass,
878 resolved_method->name(), resolved_method->signature());
879 ss.print("'");
880 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
881 }
882
883 if (log_develop_is_enabled(Trace, itables)) {
884 char buf[200];
885 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
886 Bytecodes::name(code));
887 trace_method_resolution(buf, link_info.current_klass(), resolved_klass, resolved_method(), true);
888 }
889
890 return resolved_method();
891 }
892
893 //------------------------------------------------------------------------------------------------------------------------
894 // Field resolution
895
896 void LinkResolver::check_field_accessability(Klass* ref_klass,
897 Klass* resolved_klass,
898 Klass* sel_klass,
899 const fieldDescriptor& fd,
900 TRAPS) {
901 bool can_access = Reflection::verify_member_access(ref_klass,
902 resolved_klass,
903 sel_klass,
904 fd.access_flags(),
905 true, false, CHECK);
906 // Any existing exceptions that may have been thrown, for example LinkageErrors
907 // from nest-host resolution, have been allowed to propagate.
908 if (!can_access) {
909 bool same_module = (sel_klass->module() == ref_klass->module());
910 ResourceMark rm(THREAD);
911 Exceptions::fthrow(
912 THREAD_AND_LOCATION,
913 vmSymbols::java_lang_IllegalAccessError(),
914 "class %s tried to access %s%sfield %s.%s (%s%s%s)",
915 ref_klass->external_name(),
916 fd.is_protected() ? "protected " : "",
917 fd.is_private() ? "private " : "",
918 sel_klass->external_name(),
919 fd.name()->as_C_string(),
920 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
921 (same_module) ? "" : "; ",
922 (same_module) ? "" : sel_klass->class_in_module_of_loader()
923 );
924 return;
925 }
926 }
927
928 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
929 LinkInfo link_info(pool, index, method, CHECK);
930 resolve_field(fd, link_info, byte, true, CHECK);
931 }
932
933 void LinkResolver::resolve_field(fieldDescriptor& fd,
934 const LinkInfo& link_info,
935 Bytecodes::Code byte, bool initialize_class,
936 TRAPS) {
937 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
938 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
939 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
940 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
941
942 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
943 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
944 // Check if there's a resolved klass containing the field
945 Klass* resolved_klass = link_info.resolved_klass();
946 Symbol* field = link_info.name();
947 Symbol* sig = link_info.signature();
948
949 if (resolved_klass == NULL) {
950 ResourceMark rm(THREAD);
951 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
952 }
953
954 // Resolve instance field
955 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
956 // check if field exists; i.e., if a klass containing the field def has been selected
957 if (sel_klass == NULL) {
958 ResourceMark rm(THREAD);
959 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
960 }
961
962 // Access checking may be turned off when calling from within the VM.
963 Klass* current_klass = link_info.current_klass();
964 if (link_info.check_access()) {
965
966 // check access
967 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
968
969 // check for errors
970 if (is_static != fd.is_static()) {
971 ResourceMark rm(THREAD);
972 char msg[200];
973 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
974 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
975 }
976
977 // A final field can be modified only
978 // (1) by methods declared in the class declaring the field and
979 // (2) by the <clinit> method (in case of a static field)
980 // or by the <init> method (in case of an instance field).
981 if (is_put && fd.access_flags().is_final()) {
982
983 if (sel_klass != current_klass) {
984 ResourceMark rm(THREAD);
985 stringStream ss;
986 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
987 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
988 current_klass->external_name());
989 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
990 }
991
992 if (fd.constants()->pool_holder()->major_version() >= 53) {
993 Method* m = link_info.current_method();
994 assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
995 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
996 fd.is_static() &&
997 !m->is_static_initializer());
998 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
999 !fd.is_static() &&
1000 !m->is_object_initializer());
1001
1002 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1003 ResourceMark rm(THREAD);
1004 stringStream ss;
1005 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1006 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1007 m->name()->as_C_string(),
1008 is_static ? "<clinit>" : "<init>");
1009 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1010 }
1011 }
1012 }
1013
1014 // initialize resolved_klass if necessary
1015 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1016 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1017 //
1018 // note 2: we don't want to force initialization if we are just checking
1019 // if the field access is legal; e.g., during compilation
1020 if (is_static && initialize_class) {
1021 sel_klass->initialize(CHECK);
1022 }
1023 }
1024
1025 if ((sel_klass != current_klass) && (current_klass != NULL)) {
1026 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1027 }
1028
1029 // return information. note that the klass is set to the actual klass containing the
1030 // field, otherwise access of static fields in superclasses will not work.
1031 }
1032
1033
1034 //------------------------------------------------------------------------------------------------------------------------
1035 // Invoke resolution
1036 //
1037 // Naming conventions:
1038 //
1039 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1040 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1041 // resolved_klass the specified klass (i.e., specified via constant pool index)
1042 // recv_klass the receiver klass
1043
1044
1045 void LinkResolver::resolve_static_call(CallInfo& result,
1046 const LinkInfo& link_info,
1047 bool initialize_class, TRAPS) {
1048 Method* resolved_method = linktime_resolve_static_method(link_info, CHECK);
1049
1050 // The resolved class can change as a result of this resolution.
1051 Klass* resolved_klass = resolved_method->method_holder();
1052
1053 // Initialize klass (this should only happen if everything is ok)
1054 if (initialize_class && resolved_klass->should_be_initialized()) {
1055 resolved_klass->initialize(CHECK);
1056 // Use updated LinkInfo to reresolve with resolved method holder
1057 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1058 link_info.current_klass(),
1059 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1060 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1061 }
1062
1063 // setup result
1064 result.set_static(resolved_klass, methodHandle(THREAD, resolved_method), CHECK);
1065 }
1066
1067 // throws linktime exceptions
1068 Method* LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1069
1070 Klass* resolved_klass = link_info.resolved_klass();
1071 Method* resolved_method;
1072 if (!resolved_klass->is_interface()) {
1073 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1074 } else {
1075 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1076 }
1077 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1078
1079 // check if static
1080 if (!resolved_method->is_static()) {
1081 ResourceMark rm(THREAD);
1082 stringStream ss;
1083 ss.print("Expected static method '");
1084 resolved_method->print_external_name(&ss);
1085 ss.print("'");
1086 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1087 }
1088 return resolved_method;
1089 }
1090
1091
1092 void LinkResolver::resolve_special_call(CallInfo& result,
1093 Handle recv,
1094 const LinkInfo& link_info,
1095 TRAPS) {
1096 Method* resolved_method = linktime_resolve_special_method(link_info, CHECK);
1097 runtime_resolve_special_method(result, link_info, methodHandle(THREAD, resolved_method), recv, CHECK);
1098 }
1099
1100 // throws linktime exceptions
1101 Method* LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, TRAPS) {
1102
1103 // Invokespecial is called for multiple special reasons:
1104 // <init>
1105 // local private method invocation, for classes and interfaces
1106 // superclass.method, which can also resolve to a default method
1107 // and the selected method is recalculated relative to the direct superclass
1108 // superinterface.method, which explicitly does not check shadowing
1109 Klass* resolved_klass = link_info.resolved_klass();
1110 Method* resolved_method;
1111
1112 if (!resolved_klass->is_interface()) {
1113 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1114 } else {
1115 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1116 }
1117
1118 // check if method name is <init>, that it is found in same klass as static type
1119 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1120 resolved_method->method_holder() != resolved_klass) {
1121 ResourceMark rm(THREAD);
1122 stringStream ss;
1123 ss.print("%s: method '", resolved_klass->external_name());
1124 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1125 ss.print(" %s(", resolved_method->name()->as_C_string());
1126 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1127 ss.print(")' not found");
1128 Exceptions::fthrow(
1129 THREAD_AND_LOCATION,
1130 vmSymbols::java_lang_NoSuchMethodError(),
1131 "%s", ss.as_string());
1132 return NULL;
1133 }
1134
1135 // ensure that invokespecial's interface method reference is in
1136 // a direct superinterface, not an indirect superinterface
1137 Klass* current_klass = link_info.current_klass();
1138 if (current_klass != NULL && resolved_klass->is_interface()) {
1139 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1140 InstanceKlass *klass_to_check = !ck->is_unsafe_anonymous() ?
1141 ck :
1142 ck->unsafe_anonymous_host();
1143 // Disable verification for the dynamically-generated reflection bytecodes.
1144 bool is_reflect = klass_to_check->is_subclass_of(
1145 SystemDictionary::reflect_MagicAccessorImpl_klass());
1146
1147 if (!is_reflect &&
1148 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1149 ResourceMark rm(THREAD);
1150 stringStream ss;
1151 ss.print("Interface method reference: '");
1152 resolved_method->print_external_name(&ss);
1153 ss.print("', is in an indirect superinterface of %s",
1154 current_klass->external_name());
1155 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1156 }
1157 }
1158
1159 // check if not static
1160 if (resolved_method->is_static()) {
1161 ResourceMark rm(THREAD);
1162 stringStream ss;
1163 ss.print("Expecting non-static method '");
1164 resolved_method->print_external_name(&ss);
1165 ss.print("'");
1166 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1167 }
1168
1169 if (log_develop_is_enabled(Trace, itables)) {
1170 trace_method_resolution("invokespecial resolved method: caller-class:",
1171 current_klass, resolved_klass, resolved_method, true);
1172 }
1173
1174 return resolved_method;
1175 }
1176
1177 // throws runtime exceptions
1178 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1179 const LinkInfo& link_info,
1180 const methodHandle& resolved_method,
1181 Handle recv, TRAPS) {
1182
1183 Klass* resolved_klass = link_info.resolved_klass();
1184
1185 // resolved method is selected method unless we have an old-style lookup
1186 // for a superclass method
1187 // Invokespecial for a superinterface, resolved method is selected method,
1188 // no checks for shadowing
1189 methodHandle sel_method(THREAD, resolved_method());
1190
1191 if (link_info.check_access() &&
1192 // check if the method is not <init>
1193 resolved_method->name() != vmSymbols::object_initializer_name()) {
1194
1195 Klass* current_klass = link_info.current_klass();
1196
1197 // Check if the class of the resolved_klass is a superclass
1198 // (not supertype in order to exclude interface classes) of the current class.
1199 // This check is not performed for super.invoke for interface methods
1200 // in super interfaces.
1201 if (current_klass->is_subclass_of(resolved_klass) &&
1202 current_klass != resolved_klass) {
1203 // Lookup super method
1204 Klass* super_klass = current_klass->super();
1205 Method* instance_method = lookup_instance_method_in_klasses(super_klass,
1206 resolved_method->name(),
1207 resolved_method->signature(),
1208 Klass::find_private, CHECK);
1209 sel_method = methodHandle(THREAD, instance_method);
1210
1211 // check if found
1212 if (sel_method.is_null()) {
1213 ResourceMark rm(THREAD);
1214 stringStream ss;
1215 ss.print("'");
1216 resolved_method->print_external_name(&ss);
1217 ss.print("'");
1218 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1219 // check loader constraints if found a different method
1220 } else if (sel_method() != resolved_method()) {
1221 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1222 }
1223 }
1224
1225 // Check that the class of objectref (the receiver) is the current class or interface,
1226 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1227 // throws IllegalAccessError.
1228 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1229 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1230 // a class. If the sender is an interface, the check has to be performed at runtime.
1231 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1232 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1233 if (sender->is_interface() && recv.not_null()) {
1234 Klass* receiver_klass = recv->klass();
1235 if (!receiver_klass->is_subtype_of(sender)) {
1236 ResourceMark rm(THREAD);
1237 char buf[500];
1238 jio_snprintf(buf, sizeof(buf),
1239 "Receiver class %s must be the current class or a subtype of interface %s",
1240 receiver_klass->external_name(),
1241 sender->external_name());
1242 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1243 }
1244 }
1245 }
1246
1247 // check if not static
1248 if (sel_method->is_static()) {
1249 ResourceMark rm(THREAD);
1250 stringStream ss;
1251 ss.print("Expecting non-static method '");
1252 resolved_method->print_external_name(&ss);
1253 ss.print("'");
1254 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1255 }
1256
1257 // check if abstract
1258 if (sel_method->is_abstract()) {
1259 ResourceMark rm(THREAD);
1260 stringStream ss;
1261 ss.print("'");
1262 Method::print_external_name(&ss, resolved_klass, sel_method->name(), sel_method->signature());
1263 ss.print("'");
1264 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1265 }
1266
1267 if (log_develop_is_enabled(Trace, itables)) {
1268 trace_method_resolution("invokespecial selected method: resolved-class:",
1269 resolved_klass, resolved_klass, sel_method(), true);
1270 }
1271
1272 // setup result
1273 result.set_static(resolved_klass, sel_method, CHECK);
1274 }
1275
1276 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1277 const LinkInfo& link_info,
1278 bool check_null_and_abstract, TRAPS) {
1279 Method* resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1280 runtime_resolve_virtual_method(result, methodHandle(THREAD, resolved_method),
1281 link_info.resolved_klass(),
1282 recv, receiver_klass,
1283 check_null_and_abstract, CHECK);
1284 }
1285
1286 // throws linktime exceptions
1287 Method* LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1288 TRAPS) {
1289 // normal method resolution
1290 Method* resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1291
1292 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1293 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1294
1295 // check if private interface method
1296 Klass* resolved_klass = link_info.resolved_klass();
1297 Klass* current_klass = link_info.current_klass();
1298
1299 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1300 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1301 ResourceMark rm(THREAD);
1302 stringStream ss;
1303 ss.print("private interface method requires invokespecial, not invokevirtual: method '");
1304 resolved_method->print_external_name(&ss);
1305 ss.print("', caller-class: %s",
1306 (current_klass == NULL ? "<null>" : current_klass->internal_name()));
1307 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1308 }
1309
1310 // check if not static
1311 if (resolved_method->is_static()) {
1312 ResourceMark rm(THREAD);
1313 stringStream ss;
1314 ss.print("Expecting non-static method '");
1315 resolved_method->print_external_name(&ss);
1316 ss.print("'");
1317 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1318 }
1319
1320 if (log_develop_is_enabled(Trace, vtables)) {
1321 trace_method_resolution("invokevirtual resolved method: caller-class:",
1322 current_klass, resolved_klass, resolved_method, false);
1323 }
1324
1325 return resolved_method;
1326 }
1327
1328 // throws runtime exceptions
1329 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1330 const methodHandle& resolved_method,
1331 Klass* resolved_klass,
1332 Handle recv,
1333 Klass* recv_klass,
1334 bool check_null_and_abstract,
1335 TRAPS) {
1336
1337 // setup default return values
1338 int vtable_index = Method::invalid_vtable_index;
1339 methodHandle selected_method;
1340
1341 // runtime method resolution
1342 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1343 THROW(vmSymbols::java_lang_NullPointerException());
1344 }
1345
1346 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1347 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1348 // a missing receiver might result in a bogus lookup.
1349 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1350
1351 // do lookup based on receiver klass using the vtable index
1352 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1353 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1354 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1355
1356 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1357 } else {
1358 // at this point we are sure that resolved_method is virtual and not
1359 // a default or miranda method; therefore, it must have a valid vtable index.
1360 assert(!resolved_method->has_itable_index(), "");
1361 vtable_index = resolved_method->vtable_index();
1362 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1363 // methods, or for final methods. Private methods never appear in the vtable
1364 // and never override other methods. As an optimization, final methods are
1365 // never put in the vtable, unless they override an existing method.
1366 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1367 // resolved method, and it can never be changed by an override.
1368 if (vtable_index == Method::nonvirtual_vtable_index) {
1369 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1370 selected_method = resolved_method;
1371 } else {
1372 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1373 }
1374 }
1375
1376 // check if method exists
1377 if (selected_method.is_null()) {
1378 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1379 }
1380
1381 // check if abstract
1382 if (check_null_and_abstract && selected_method->is_abstract()) {
1383 // Pass arguments for generating a verbose error message.
1384 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
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, 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 Method* resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1401 methodHandle mh(THREAD, resolved_method);
1402 runtime_resolve_interface_method(result, mh, link_info.resolved_klass(),
1403 recv, recv_klass, check_null_and_abstract, CHECK);
1404 }
1405
1406 Method* LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1407 TRAPS) {
1408 // normal interface method resolution
1409 Method* resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1410 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1411 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1412
1413 return resolved_method;
1414 }
1415
1416 // throws runtime exceptions
1417 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1418 const methodHandle& resolved_method,
1419 Klass* resolved_klass,
1420 Handle recv,
1421 Klass* recv_klass,
1422 bool check_null_and_abstract, TRAPS) {
1423
1424 // check if receiver exists
1425 if (check_null_and_abstract && recv.is_null()) {
1426 THROW(vmSymbols::java_lang_NullPointerException());
1427 }
1428
1429 // check if receiver klass implements the resolved interface
1430 if (!recv_klass->is_subtype_of(resolved_klass)) {
1431 ResourceMark rm(THREAD);
1432 char buf[200];
1433 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1434 recv_klass->external_name(),
1435 resolved_klass->external_name());
1436 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1437 }
1438
1439 methodHandle selected_method = resolved_method;
1440
1441 // resolve the method in the receiver class, unless it is private
1442 if (!resolved_method()->is_private()) {
1443 // do lookup based on receiver klass
1444 // This search must match the linktime preparation search for itable initialization
1445 // to correctly enforce loader constraints for interface method inheritance.
1446 // Private methods are skipped as the resolved method was not private.
1447 Method* method = lookup_instance_method_in_klasses(recv_klass,
1448 resolved_method->name(),
1449 resolved_method->signature(),
1450 Klass::skip_private, CHECK);
1451 selected_method = methodHandle(THREAD, method);
1452
1453 if (selected_method.is_null() && !check_null_and_abstract) {
1454 // In theory this is a harmless placeholder value, but
1455 // in practice leaving in null affects the nsk default method tests.
1456 // This needs further study.
1457 selected_method = resolved_method;
1458 }
1459 // check if method exists
1460 if (selected_method.is_null()) {
1461 // Pass arguments for generating a verbose error message.
1462 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1463 }
1464 // check access
1465 // Throw Illegal Access Error if selected_method is not public.
1466 if (!selected_method->is_public()) {
1467 ResourceMark rm(THREAD);
1468 stringStream ss;
1469 ss.print("'");
1470 Method::print_external_name(&ss, recv_klass, selected_method->name(), selected_method->signature());
1471 ss.print("'");
1472 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1473 }
1474 // check if abstract
1475 if (check_null_and_abstract && selected_method->is_abstract()) {
1476 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1477 }
1478 }
1479
1480 if (log_develop_is_enabled(Trace, itables)) {
1481 trace_method_resolution("invokeinterface selected method: receiver-class:",
1482 recv_klass, resolved_klass, selected_method(), true);
1483 }
1484 // setup result
1485 if (resolved_method->has_vtable_index()) {
1486 int vtable_index = resolved_method->vtable_index();
1487 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1488 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1489 result.set_virtual(resolved_klass, resolved_method, selected_method, vtable_index, CHECK);
1490 } else if (resolved_method->has_itable_index()) {
1491 int itable_index = resolved_method()->itable_index();
1492 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1493 result.set_interface(resolved_klass, resolved_method, selected_method, itable_index, CHECK);
1494 } else {
1495 int index = resolved_method->vtable_index();
1496 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1497 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1498 assert(resolved_method()->is_private() ||
1499 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1500 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1501 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1502 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1503 result.set_virtual(resolved_klass, resolved_method, resolved_method, index, CHECK);
1504 }
1505 }
1506
1507
1508 Method* LinkResolver::linktime_resolve_interface_method_or_null(
1509 const LinkInfo& link_info) {
1510 EXCEPTION_MARK;
1511 Method* method_result = linktime_resolve_interface_method(link_info, THREAD);
1512 if (HAS_PENDING_EXCEPTION) {
1513 CLEAR_PENDING_EXCEPTION;
1514 return NULL;
1515 } else {
1516 return method_result;
1517 }
1518 }
1519
1520 Method* LinkResolver::linktime_resolve_virtual_method_or_null(
1521 const LinkInfo& link_info) {
1522 EXCEPTION_MARK;
1523 Method* method_result = linktime_resolve_virtual_method(link_info, THREAD);
1524 if (HAS_PENDING_EXCEPTION) {
1525 CLEAR_PENDING_EXCEPTION;
1526 return NULL;
1527 } else {
1528 return method_result;
1529 }
1530 }
1531
1532 Method* LinkResolver::resolve_virtual_call_or_null(
1533 Klass* receiver_klass,
1534 const LinkInfo& link_info) {
1535 EXCEPTION_MARK;
1536 CallInfo info;
1537 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1538 if (HAS_PENDING_EXCEPTION) {
1539 CLEAR_PENDING_EXCEPTION;
1540 return NULL;
1541 }
1542 return info.selected_method();
1543 }
1544
1545 Method* LinkResolver::resolve_interface_call_or_null(
1546 Klass* receiver_klass,
1547 const LinkInfo& link_info) {
1548 EXCEPTION_MARK;
1549 CallInfo info;
1550 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1551 if (HAS_PENDING_EXCEPTION) {
1552 CLEAR_PENDING_EXCEPTION;
1553 return NULL;
1554 }
1555 return info.selected_method();
1556 }
1557
1558 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1559 const LinkInfo& link_info) {
1560 EXCEPTION_MARK;
1561 CallInfo info;
1562 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1563 /*check_null_or_abstract*/false, THREAD);
1564 if (HAS_PENDING_EXCEPTION) {
1565 CLEAR_PENDING_EXCEPTION;
1566 return Method::invalid_vtable_index;
1567 }
1568 return info.vtable_index();
1569 }
1570
1571 Method* LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1572 EXCEPTION_MARK;
1573 CallInfo info;
1574 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1575 if (HAS_PENDING_EXCEPTION) {
1576 CLEAR_PENDING_EXCEPTION;
1577 return NULL;
1578 }
1579 return info.selected_method();
1580 }
1581
1582 Method* LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1583 EXCEPTION_MARK;
1584 CallInfo info;
1585 resolve_special_call(info, Handle(), link_info, THREAD);
1586 if (HAS_PENDING_EXCEPTION) {
1587 CLEAR_PENDING_EXCEPTION;
1588 return NULL;
1589 }
1590 return info.selected_method();
1591 }
1592
1593
1594
1595 //------------------------------------------------------------------------------------------------------------------------
1596 // ConstantPool entries
1597
1598 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1599 switch (byte) {
1600 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1601 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1602 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1603 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1604 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1605 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1606 default : break;
1607 }
1608 return;
1609 }
1610
1611 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1612 const methodHandle& attached_method,
1613 Bytecodes::Code byte, TRAPS) {
1614 Klass* defc = attached_method->method_holder();
1615 Symbol* name = attached_method->name();
1616 Symbol* type = attached_method->signature();
1617 LinkInfo link_info(defc, name, type);
1618 switch(byte) {
1619 case Bytecodes::_invokevirtual:
1620 resolve_virtual_call(result, recv, recv->klass(), link_info,
1621 /*check_null_and_abstract=*/true, CHECK);
1622 break;
1623 case Bytecodes::_invokeinterface:
1624 resolve_interface_call(result, recv, recv->klass(), link_info,
1625 /*check_null_and_abstract=*/true, CHECK);
1626 break;
1627 case Bytecodes::_invokestatic:
1628 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1629 break;
1630 case Bytecodes::_invokespecial:
1631 resolve_special_call(result, recv, link_info, CHECK);
1632 break;
1633 default:
1634 fatal("bad call: %s", Bytecodes::name(byte));
1635 break;
1636 }
1637 }
1638
1639 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1640 LinkInfo link_info(pool, index, CHECK);
1641 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1642 }
1643
1644
1645 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1646 const constantPoolHandle& pool, int index, TRAPS) {
1647 LinkInfo link_info(pool, index, CHECK);
1648 resolve_special_call(result, recv, link_info, CHECK);
1649 }
1650
1651
1652 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1653 const constantPoolHandle& pool, int index,
1654 TRAPS) {
1655
1656 LinkInfo link_info(pool, index, CHECK);
1657 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1658 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1659 }
1660
1661
1662 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1663 LinkInfo link_info(pool, index, CHECK);
1664 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1665 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1666 }
1667
1668
1669 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1670 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1671 LinkInfo link_info(pool, index, CHECK);
1672 if (TraceMethodHandles) {
1673 ResourceMark rm(THREAD);
1674 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1675 link_info.signature()->as_C_string());
1676 }
1677 resolve_handle_call(result, link_info, CHECK);
1678 }
1679
1680 void LinkResolver::resolve_handle_call(CallInfo& result,
1681 const LinkInfo& link_info,
1682 TRAPS) {
1683 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1684 Klass* resolved_klass = link_info.resolved_klass();
1685 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1686 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1687 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1688 Handle resolved_appendix;
1689 Method* resolved_method = lookup_polymorphic_method(link_info, &resolved_appendix, CHECK);
1690 result.set_handle(resolved_klass, methodHandle(THREAD, resolved_method), resolved_appendix, CHECK);
1691 }
1692
1693 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int indy_index, TRAPS) {
1694 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(indy_index);
1695 int pool_index = cpce->constant_pool_index();
1696
1697 // Resolve the bootstrap specifier (BSM + optional arguments).
1698 BootstrapInfo bootstrap_specifier(pool, pool_index, indy_index);
1699
1700 // Check if CallSite has been bound already or failed already, and short circuit:
1701 {
1702 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1703 if (is_done) return;
1704 }
1705
1706 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1707 // reference to a method handle which will be the bootstrap method for a dynamic
1708 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1709 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1710 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1711 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1712 // this bootstrap method will encounter the resolution of MethodHandleInError.
1713
1714 resolve_dynamic_call(result, bootstrap_specifier, CHECK);
1715
1716 if (TraceMethodHandles) {
1717 bootstrap_specifier.print_msg_on(tty, "resolve_invokedynamic");
1718 }
1719
1720 // The returned linkage result is provisional up to the moment
1721 // the interpreter or runtime performs a serialized check of
1722 // the relevant CPCE::f1 field. This is done by the caller
1723 // of this method, via CPCE::set_dynamic_call, which uses
1724 // an ObjectLocker to do the final serialization of updates
1725 // to CPCE state, including f1.
1726 }
1727
1728 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1729 BootstrapInfo& bootstrap_specifier,
1730 TRAPS) {
1731 // JSR 292: this must resolve to an implicitly generated method
1732 // such as MH.linkToCallSite(*...) or some other call-site shape.
1733 // The appendix argument is likely to be a freshly-created CallSite.
1734 // It may also be a MethodHandle from an unwrapped ConstantCallSite,
1735 // or any other reference. The resolved_method as well as the appendix
1736 // are both recorded together via CallInfo::set_handle.
1737 SystemDictionary::invoke_bootstrap_method(bootstrap_specifier, THREAD);
1738 Exceptions::wrap_dynamic_exception(THREAD);
1739
1740 if (HAS_PENDING_EXCEPTION) {
1741 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1742 // Let any random low-level IE or SOE or OOME just bleed through.
1743 // Basically we pretend that the bootstrap method was never called,
1744 // if it fails this way: We neither record a successful linkage,
1745 // nor do we memorize a LE for posterity.
1746 return;
1747 }
1748 // JVMS 5.4.3 says: If an attempt by the Java Virtual Machine to resolve
1749 // a symbolic reference fails because an error is thrown that is an
1750 // instance of LinkageError (or a subclass), then subsequent attempts to
1751 // resolve the reference always fail with the same error that was thrown
1752 // as a result of the initial resolution attempt.
1753 bool recorded_res_status = bootstrap_specifier.save_and_throw_indy_exc(CHECK);
1754 if (!recorded_res_status) {
1755 // Another thread got here just before we did. So, either use the method
1756 // that it resolved or throw the LinkageError exception that it threw.
1757 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1758 if (is_done) return;
1759 }
1760 assert(bootstrap_specifier.invokedynamic_cp_cache_entry()->indy_resolution_failed(),
1761 "Resolution failure flag wasn't set");
1762 }
1763
1764 bootstrap_specifier.resolve_newly_linked_invokedynamic(result, CHECK);
1765 // Exceptions::wrap_dynamic_exception not used because
1766 // set_handle doesn't throw linkage errors
1767 }
1768
1769 // Selected method is abstract.
1770 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1771 const methodHandle& selected_method,
1772 Klass *recv_klass, TRAPS) {
1773 Klass *resolved_klass = resolved_method->method_holder();
1774 ResourceMark rm(THREAD);
1775 stringStream ss;
1776
1777 if (recv_klass != NULL) {
1778 ss.print("Receiver class %s does not define or inherit an "
1779 "implementation of the",
1780 recv_klass->external_name());
1781 } else {
1782 ss.print("Missing implementation of");
1783 }
1784
1785 assert(resolved_method.not_null(), "Sanity");
1786 ss.print(" resolved method '%s%s",
1787 resolved_method->is_abstract() ? "abstract " : "",
1788 resolved_method->is_private() ? "private " : "");
1789 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1790 ss.print(" %s(", resolved_method->name()->as_C_string());
1791 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1792 ss.print(")' of %s %s.",
1793 resolved_klass->external_kind(),
1794 resolved_klass->external_name());
1795
1796 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1797 ss.print(" Selected method is '%s%s",
1798 selected_method->is_abstract() ? "abstract " : "",
1799 selected_method->is_private() ? "private " : "");
1800 selected_method->print_external_name(&ss);
1801 ss.print("'.");
1802 }
1803
1804 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1805 }