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
583 // have been allowed to propagate.
584 if (!can_access) {
585 ResourceMark rm(THREAD);
586 stringStream ss;
587 bool same_module = (sel_klass->module() == ref_klass->module());
588 ss.print("class %s tried to access %s%s%smethod '%s' (%s%s%s)",
589 ref_klass->external_name(),
590 sel_method->is_abstract() ? "abstract " : "",
591 sel_method->is_protected() ? "protected " : "",
592 sel_method->is_private() ? "private " : "",
593 sel_method->external_name(),
594 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
595 (same_module) ? "" : "; ",
596 (same_module) ? "" : sel_klass->class_in_module_of_loader()
597 );
598
599 // For private access check if there was a problem with nest host
600 // resolution, and if so report that as part of the message.
601 if (sel_method->is_private()) {
602 assert(ref_klass->is_instance_klass(), "must be");
603 assert(sel_klass->is_instance_klass(), "must be");
604 InstanceKlass* ref_ik = InstanceKlass::cast(ref_klass);
605 InstanceKlass* sel_ik = InstanceKlass::cast(sel_klass);
606 const char* nest_host_error_1 = ref_ik->nest_host_resolution_error();
607 const char* nest_host_error_2 = sel_ik->nest_host_resolution_error();
608 if (nest_host_error_1 != NULL || nest_host_error_2 != NULL) {
609 ss.print(", (");
610 if (nest_host_error_1 != NULL) {
611 ss.print("%s", nest_host_error_1);
612 if (nest_host_error_2 != NULL) {
613 ss.print(", %s", nest_host_error_2);
614 }
615 } else if (nest_host_error_2 != NULL) {
616 ss.print("%s", nest_host_error_2);
617 }
618 ss.print(")");
619 }
620 }
621
622 Exceptions::fthrow(THREAD_AND_LOCATION,
623 vmSymbols::java_lang_IllegalAccessError(),
624 "%s",
625 ss.as_string()
626 );
627 return;
628 }
629 }
630
631 Method* LinkResolver::resolve_method_statically(Bytecodes::Code code,
632 const constantPoolHandle& pool, int index, TRAPS) {
633 // This method is used only
634 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
635 // and
636 // (2) in Bytecode_invoke::static_target
637 // It appears to fail when applied to an invokeinterface call site.
638 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
639 // resolve klass
640 if (code == Bytecodes::_invokedynamic) {
641 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
642 Symbol* method_name = vmSymbols::invoke_name();
643 Symbol* method_signature = pool->signature_ref_at(index);
644 Klass* current_klass = pool->pool_holder();
645 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
646 return resolve_method(link_info, code, THREAD);
647 }
648
649 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
650 Klass* resolved_klass = link_info.resolved_klass();
651
652 if (pool->has_preresolution()
653 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
654 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
655 Method* result = ConstantPool::method_at_if_loaded(pool, index);
656 if (result != NULL) {
657 return result;
658 }
659 }
660
661 if (code == Bytecodes::_invokeinterface) {
662 return resolve_interface_method(link_info, code, THREAD);
663 } else if (code == Bytecodes::_invokevirtual) {
664 return resolve_method(link_info, code, THREAD);
665 } else if (!resolved_klass->is_interface()) {
666 return resolve_method(link_info, code, THREAD);
667 } else {
668 return resolve_interface_method(link_info, code, THREAD);
669 }
670 }
671
672 // Check and print a loader constraint violation message for method or interface method
673 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
674 const methodHandle& resolved_method,
675 const char* method_type, TRAPS) {
676 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
677 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
678
679 ResourceMark rm(THREAD);
680 Symbol* failed_type_symbol =
681 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
682 resolved_loader, true, CHECK);
683 if (failed_type_symbol != NULL) {
684 Klass* current_class = link_info.current_klass();
685 ClassLoaderData* current_loader_data = current_class->class_loader_data();
686 assert(current_loader_data != NULL, "current class has no class loader data");
687 Klass* resolved_method_class = resolved_method->method_holder();
688 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
689 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
690
691 stringStream ss;
692 ss.print("loader constraint violation: when resolving %s '", method_type);
693 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
694 ss.print("' the class loader %s of the current class, %s,"
695 " and the class loader %s for the method's defining class, %s, have"
696 " different Class objects for the type %s used in the signature (%s; %s)",
697 current_loader_data->loader_name_and_id(),
698 current_class->name()->as_C_string(),
699 target_loader_data->loader_name_and_id(),
700 resolved_method_class->name()->as_C_string(),
701 failed_type_symbol->as_C_string(),
702 current_class->class_in_module_of_loader(false, true),
703 resolved_method_class->class_in_module_of_loader(false, true));
704 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
705 }
706 }
707
708 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
709 Klass* current_klass,
710 Klass* sel_klass, TRAPS) {
711 Handle ref_loader(THREAD, current_klass->class_loader());
712 Handle sel_loader(THREAD, sel_klass->class_loader());
713
714 ResourceMark rm(THREAD); // needed for check_signature_loaders
715 Symbol* failed_type_symbol =
716 SystemDictionary::check_signature_loaders(sig,
717 ref_loader, sel_loader,
718 false,
719 CHECK);
720 if (failed_type_symbol != NULL) {
721 stringStream ss;
722 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
723
724 ss.print("loader constraint violation: when resolving field \"%s\" of type %s, "
725 "the class loader %s of the current class, %s, "
726 "and the class loader %s for the field's defining %s, %s, "
727 "have different Class objects for type %s (%s; %s)",
728 field->as_C_string(),
729 failed_type_name,
730 current_klass->class_loader_data()->loader_name_and_id(),
731 current_klass->external_name(),
732 sel_klass->class_loader_data()->loader_name_and_id(),
733 sel_klass->external_kind(),
734 sel_klass->external_name(),
735 failed_type_name,
736 current_klass->class_in_module_of_loader(false, true),
737 sel_klass->class_in_module_of_loader(false, true));
738 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
739 }
740 }
741
742 Method* LinkResolver::resolve_method(const LinkInfo& link_info,
743 Bytecodes::Code code, TRAPS) {
744
745 Handle nested_exception;
746 Klass* resolved_klass = link_info.resolved_klass();
747
748 // 1. For invokevirtual, cannot call an interface method
749 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
750 ResourceMark rm(THREAD);
751 char buf[200];
752 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
753 resolved_klass->external_name());
754 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
755 }
756
757 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
758 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
759 ResourceMark rm(THREAD);
760 stringStream ss;
761 ss.print("Method '");
762 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
763 ss.print("' must be Methodref constant");
764 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
765 }
766
767 // 3. lookup method in resolved klass and its super klasses
768 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
769
770 // 4. lookup method in all the interfaces implemented by the resolved klass
771 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
772 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
773
774 if (resolved_method.is_null()) {
775 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
776 Method* method = lookup_polymorphic_method(link_info, (Handle*)NULL, THREAD);
777 resolved_method = methodHandle(THREAD, method);
778 if (HAS_PENDING_EXCEPTION) {
779 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
780 CLEAR_PENDING_EXCEPTION;
781 }
782 }
783 }
784
785 // 5. method lookup failed
786 if (resolved_method.is_null()) {
787 ResourceMark rm(THREAD);
788 stringStream ss;
789 ss.print("'");
790 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
791 ss.print("'");
792 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
793 ss.as_string(), nested_exception, NULL);
794 }
795
796 // 6. access checks, access checking may be turned off when calling from within the VM.
797 Klass* current_klass = link_info.current_klass();
798 if (link_info.check_access()) {
799 assert(current_klass != NULL , "current_klass should not be null");
800
801 // check if method can be accessed by the referring class
802 check_method_accessability(current_klass,
803 resolved_klass,
804 resolved_method->method_holder(),
805 resolved_method,
806 CHECK_NULL);
807
808 // check loader constraints
809 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
810 }
811
812 return resolved_method();
813 }
814
815 static void trace_method_resolution(const char* prefix,
816 Klass* klass,
817 Klass* resolved_klass,
818 Method* method,
819 bool logitables,
820 int index = -1) {
821 #ifndef PRODUCT
822 ResourceMark rm;
823 Log(itables) logi;
824 LogStream lsi(logi.trace());
825 Log(vtables) logv;
826 LogStream lsv(logv.trace());
827 outputStream* st;
828 if (logitables) {
829 st = &lsi;
830 } else {
831 st = &lsv;
832 }
833 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
834 prefix,
835 (klass == NULL ? "<NULL>" : klass->internal_name()),
836 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
837 Method::name_and_sig_as_C_string(resolved_klass,
838 method->name(),
839 method->signature()),
840 method->method_holder()->internal_name());
841 method->print_linkage_flags(st);
842 if (index != -1) {
843 st->print("vtable_index:%d", index);
844 }
845 st->cr();
846 #endif // PRODUCT
847 }
848
849 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
850 Method* LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
851
852 Klass* resolved_klass = link_info.resolved_klass();
853
854 // check if klass is interface
855 if (!resolved_klass->is_interface()) {
856 ResourceMark rm(THREAD);
857 char buf[200];
858 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
859 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
860 }
861
862 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
863 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
864 ResourceMark rm(THREAD);
865 stringStream ss;
866 ss.print("Method '");
867 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
868 ss.print("' must be InterfaceMethodref constant");
869 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
870 }
871
872 // lookup method in this interface or its super, java.lang.Object
873 // JDK8: also look for static methods
874 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
875
876 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
877 // lookup method in all the super-interfaces
878 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
879 }
880
881 if (resolved_method.is_null()) {
882 // no method found
883 ResourceMark rm(THREAD);
884 stringStream ss;
885 ss.print("'");
886 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
887 ss.print("'");
888 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
889 }
890
891 if (link_info.check_access()) {
892 // JDK8 adds non-public interface methods, and accessability check requirement
893 Klass* current_klass = link_info.current_klass();
894
895 assert(current_klass != NULL , "current_klass should not be null");
896
897 // check if method can be accessed by the referring class
898 check_method_accessability(current_klass,
899 resolved_klass,
900 resolved_method->method_holder(),
901 resolved_method,
902 CHECK_NULL);
903
904 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
905 }
906
907 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
908 ResourceMark rm(THREAD);
909 stringStream ss;
910 ss.print("Expected instance not static method '");
911 Method::print_external_name(&ss, resolved_klass,
912 resolved_method->name(), resolved_method->signature());
913 ss.print("'");
914 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
915 }
916
917 if (log_develop_is_enabled(Trace, itables)) {
918 char buf[200];
919 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
920 Bytecodes::name(code));
921 trace_method_resolution(buf, link_info.current_klass(), resolved_klass, resolved_method(), true);
922 }
923
924 return resolved_method();
925 }
926
927 //------------------------------------------------------------------------------------------------------------------------
928 // Field resolution
929
930 void LinkResolver::check_field_accessability(Klass* ref_klass,
931 Klass* resolved_klass,
932 Klass* sel_klass,
933 const fieldDescriptor& fd,
934 TRAPS) {
935 bool can_access = Reflection::verify_member_access(ref_klass,
936 resolved_klass,
937 sel_klass,
938 fd.access_flags(),
939 true, false, CHECK);
940 // Any existing exceptions that may have been thrown, for example LinkageErrors
941 // from nest-host resolution, have been allowed to propagate.
942 if (!can_access) {
943 bool same_module = (sel_klass->module() == ref_klass->module());
944 ResourceMark rm(THREAD);
945 stringStream ss;
946 ss.print("class %s tried to access %s%sfield %s.%s (%s%s%s)",
947 ref_klass->external_name(),
948 fd.is_protected() ? "protected " : "",
949 fd.is_private() ? "private " : "",
950 sel_klass->external_name(),
951 fd.name()->as_C_string(),
952 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
953 (same_module) ? "" : "; ",
954 (same_module) ? "" : sel_klass->class_in_module_of_loader()
955 );
956 // For private access check if there was a problem with nest host
957 // resolution, and if so report that as part of the message.
958 if (fd.is_private()) {
959 assert(ref_klass->is_instance_klass(), "must be");
960 assert(sel_klass->is_instance_klass(), "must be");
961 InstanceKlass* ref_ik = InstanceKlass::cast(ref_klass);
962 InstanceKlass* sel_ik = InstanceKlass::cast(sel_klass);
963 const char* nest_host_error_1 = ref_ik->nest_host_resolution_error();
964 const char* nest_host_error_2 = sel_ik->nest_host_resolution_error();
965 if (nest_host_error_1 != NULL || nest_host_error_2 != NULL) {
966 ss.print(", (");
967 if (nest_host_error_1 != NULL) {
968 ss.print("%s", nest_host_error_1);
969 if (nest_host_error_2 != NULL) {
970 ss.print(", %s", nest_host_error_2);
971 }
972 } else if (nest_host_error_2 != NULL) {
973 ss.print("%s", nest_host_error_2);
974 }
975 ss.print(")");
976 }
977 }
978 Exceptions::fthrow(THREAD_AND_LOCATION,
979 vmSymbols::java_lang_IllegalAccessError(),
980 "%s",
981 ss.as_string()
982 );
983 return;
984 }
985 }
986
987 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
988 LinkInfo link_info(pool, index, method, CHECK);
989 resolve_field(fd, link_info, byte, true, CHECK);
990 }
991
992 void LinkResolver::resolve_field(fieldDescriptor& fd,
993 const LinkInfo& link_info,
994 Bytecodes::Code byte, bool initialize_class,
995 TRAPS) {
996 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
997 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
998 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
999 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
1000
1001 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
1002 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
1003 // Check if there's a resolved klass containing the field
1004 Klass* resolved_klass = link_info.resolved_klass();
1005 Symbol* field = link_info.name();
1006 Symbol* sig = link_info.signature();
1007
1008 if (resolved_klass == NULL) {
1009 ResourceMark rm(THREAD);
1010 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
1011 }
1012
1013 // Resolve instance field
1014 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
1015 // check if field exists; i.e., if a klass containing the field def has been selected
1016 if (sel_klass == NULL) {
1017 ResourceMark rm(THREAD);
1018 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
1019 }
1020
1021 // Access checking may be turned off when calling from within the VM.
1022 Klass* current_klass = link_info.current_klass();
1023 if (link_info.check_access()) {
1024
1025 // check access
1026 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
1027
1028 // check for errors
1029 if (is_static != fd.is_static()) {
1030 ResourceMark rm(THREAD);
1031 char msg[200];
1032 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
1033 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
1034 }
1035
1036 // A final field can be modified only
1037 // (1) by methods declared in the class declaring the field and
1038 // (2) by the <clinit> method (in case of a static field)
1039 // or by the <init> method (in case of an instance field).
1040 if (is_put && fd.access_flags().is_final()) {
1041 ResourceMark rm(THREAD);
1042 stringStream ss;
1043
1044 if (sel_klass != current_klass) {
1045 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1046 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1047 current_klass->external_name());
1048 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1049 }
1050
1051 if (fd.constants()->pool_holder()->major_version() >= 53) {
1052 Method* m = link_info.current_method();
1053 assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
1054 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1055 fd.is_static() &&
1056 !m->is_static_initializer());
1057 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1058 !fd.is_static() &&
1059 !m->is_object_initializer());
1060
1061 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1062 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1063 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1064 m->name()->as_C_string(),
1065 is_static ? "<clinit>" : "<init>");
1066 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1067 }
1068 }
1069 }
1070
1071 // initialize resolved_klass if necessary
1072 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1073 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1074 //
1075 // note 2: we don't want to force initialization if we are just checking
1076 // if the field access is legal; e.g., during compilation
1077 if (is_static && initialize_class) {
1078 sel_klass->initialize(CHECK);
1079 }
1080 }
1081
1082 if ((sel_klass != current_klass) && (current_klass != NULL)) {
1083 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1084 }
1085
1086 // return information. note that the klass is set to the actual klass containing the
1087 // field, otherwise access of static fields in superclasses will not work.
1088 }
1089
1090
1091 //------------------------------------------------------------------------------------------------------------------------
1092 // Invoke resolution
1093 //
1094 // Naming conventions:
1095 //
1096 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1097 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1098 // resolved_klass the specified klass (i.e., specified via constant pool index)
1099 // recv_klass the receiver klass
1100
1101
1102 void LinkResolver::resolve_static_call(CallInfo& result,
1103 const LinkInfo& link_info,
1104 bool initialize_class, TRAPS) {
1105 Method* resolved_method = linktime_resolve_static_method(link_info, CHECK);
1106
1107 // The resolved class can change as a result of this resolution.
1108 Klass* resolved_klass = resolved_method->method_holder();
1109
1110 // Initialize klass (this should only happen if everything is ok)
1111 if (initialize_class && resolved_klass->should_be_initialized()) {
1112 resolved_klass->initialize(CHECK);
1113 // Use updated LinkInfo to reresolve with resolved method holder
1114 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1115 link_info.current_klass(),
1116 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1117 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1118 }
1119
1120 // setup result
1121 result.set_static(resolved_klass, methodHandle(THREAD, resolved_method), CHECK);
1122 }
1123
1124 // throws linktime exceptions
1125 Method* LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1126
1127 Klass* resolved_klass = link_info.resolved_klass();
1128 Method* resolved_method;
1129 if (!resolved_klass->is_interface()) {
1130 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1131 } else {
1132 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1133 }
1134 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1135
1136 // check if static
1137 if (!resolved_method->is_static()) {
1138 ResourceMark rm(THREAD);
1139 stringStream ss;
1140 ss.print("Expected static method '");
1141 resolved_method->print_external_name(&ss);
1142 ss.print("'");
1143 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1144 }
1145 return resolved_method;
1146 }
1147
1148
1149 void LinkResolver::resolve_special_call(CallInfo& result,
1150 Handle recv,
1151 const LinkInfo& link_info,
1152 TRAPS) {
1153 Method* resolved_method = linktime_resolve_special_method(link_info, CHECK);
1154 runtime_resolve_special_method(result, link_info, methodHandle(THREAD, resolved_method), recv, CHECK);
1155 }
1156
1157 // throws linktime exceptions
1158 Method* LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, TRAPS) {
1159
1160 // Invokespecial is called for multiple special reasons:
1161 // <init>
1162 // local private method invocation, for classes and interfaces
1163 // superclass.method, which can also resolve to a default method
1164 // and the selected method is recalculated relative to the direct superclass
1165 // superinterface.method, which explicitly does not check shadowing
1166 Klass* resolved_klass = link_info.resolved_klass();
1167 Method* resolved_method;
1168
1169 if (!resolved_klass->is_interface()) {
1170 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1171 } else {
1172 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1173 }
1174
1175 // check if method name is <init>, that it is found in same klass as static type
1176 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1177 resolved_method->method_holder() != resolved_klass) {
1178 ResourceMark rm(THREAD);
1179 stringStream ss;
1180 ss.print("%s: method '", resolved_klass->external_name());
1181 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1182 ss.print(" %s(", resolved_method->name()->as_C_string());
1183 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1184 ss.print(")' not found");
1185 Exceptions::fthrow(
1186 THREAD_AND_LOCATION,
1187 vmSymbols::java_lang_NoSuchMethodError(),
1188 "%s", ss.as_string());
1189 return NULL;
1190 }
1191
1192 // ensure that invokespecial's interface method reference is in
1193 // a direct superinterface, not an indirect superinterface
1194 Klass* current_klass = link_info.current_klass();
1195 if (current_klass != NULL && resolved_klass->is_interface()) {
1196 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1197 InstanceKlass *klass_to_check = !ck->is_unsafe_anonymous() ?
1198 ck :
1199 ck->unsafe_anonymous_host();
1200 // Disable verification for the dynamically-generated reflection bytecodes.
1201 bool is_reflect = klass_to_check->is_subclass_of(
1202 SystemDictionary::reflect_MagicAccessorImpl_klass());
1203
1204 if (!is_reflect &&
1205 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1206 ResourceMark rm(THREAD);
1207 stringStream ss;
1208 ss.print("Interface method reference: '");
1209 resolved_method->print_external_name(&ss);
1210 ss.print("', is in an indirect superinterface of %s",
1211 current_klass->external_name());
1212 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1213 }
1214 }
1215
1216 // check if not static
1217 if (resolved_method->is_static()) {
1218 ResourceMark rm(THREAD);
1219 stringStream ss;
1220 ss.print("Expecting non-static method '");
1221 resolved_method->print_external_name(&ss);
1222 ss.print("'");
1223 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1224 }
1225
1226 if (log_develop_is_enabled(Trace, itables)) {
1227 trace_method_resolution("invokespecial resolved method: caller-class:",
1228 current_klass, resolved_klass, resolved_method, true);
1229 }
1230
1231 return resolved_method;
1232 }
1233
1234 // throws runtime exceptions
1235 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1236 const LinkInfo& link_info,
1237 const methodHandle& resolved_method,
1238 Handle recv, TRAPS) {
1239
1240 Klass* resolved_klass = link_info.resolved_klass();
1241
1242 // resolved method is selected method unless we have an old-style lookup
1243 // for a superclass method
1244 // Invokespecial for a superinterface, resolved method is selected method,
1245 // no checks for shadowing
1246 methodHandle sel_method(THREAD, resolved_method());
1247
1248 if (link_info.check_access() &&
1249 // check if the method is not <init>
1250 resolved_method->name() != vmSymbols::object_initializer_name()) {
1251
1252 Klass* current_klass = link_info.current_klass();
1253
1254 // Check if the class of the resolved_klass is a superclass
1255 // (not supertype in order to exclude interface classes) of the current class.
1256 // This check is not performed for super.invoke for interface methods
1257 // in super interfaces.
1258 if (current_klass->is_subclass_of(resolved_klass) &&
1259 current_klass != resolved_klass) {
1260 // Lookup super method
1261 Klass* super_klass = current_klass->super();
1262 Method* instance_method = lookup_instance_method_in_klasses(super_klass,
1263 resolved_method->name(),
1264 resolved_method->signature(),
1265 Klass::find_private, CHECK);
1266 sel_method = methodHandle(THREAD, instance_method);
1267
1268 // check if found
1269 if (sel_method.is_null()) {
1270 ResourceMark rm(THREAD);
1271 stringStream ss;
1272 ss.print("'");
1273 resolved_method->print_external_name(&ss);
1274 ss.print("'");
1275 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1276 // check loader constraints if found a different method
1277 } else if (sel_method() != resolved_method()) {
1278 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1279 }
1280 }
1281
1282 // Check that the class of objectref (the receiver) is the current class or interface,
1283 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1284 // throws IllegalAccessError.
1285 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1286 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1287 // a class. If the sender is an interface, the check has to be performed at runtime.
1288 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1289 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1290 if (sender->is_interface() && recv.not_null()) {
1291 Klass* receiver_klass = recv->klass();
1292 if (!receiver_klass->is_subtype_of(sender)) {
1293 ResourceMark rm(THREAD);
1294 char buf[500];
1295 jio_snprintf(buf, sizeof(buf),
1296 "Receiver class %s must be the current class or a subtype of interface %s",
1297 receiver_klass->external_name(),
1298 sender->external_name());
1299 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1300 }
1301 }
1302 }
1303
1304 // check if not static
1305 if (sel_method->is_static()) {
1306 ResourceMark rm(THREAD);
1307 stringStream ss;
1308 ss.print("Expecting non-static method '");
1309 resolved_method->print_external_name(&ss);
1310 ss.print("'");
1311 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1312 }
1313
1314 // check if abstract
1315 if (sel_method->is_abstract()) {
1316 ResourceMark rm(THREAD);
1317 stringStream ss;
1318 ss.print("'");
1319 Method::print_external_name(&ss, resolved_klass, sel_method->name(), sel_method->signature());
1320 ss.print("'");
1321 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1322 }
1323
1324 if (log_develop_is_enabled(Trace, itables)) {
1325 trace_method_resolution("invokespecial selected method: resolved-class:",
1326 resolved_klass, resolved_klass, sel_method(), true);
1327 }
1328
1329 // setup result
1330 result.set_static(resolved_klass, sel_method, CHECK);
1331 }
1332
1333 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1334 const LinkInfo& link_info,
1335 bool check_null_and_abstract, TRAPS) {
1336 Method* resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1337 runtime_resolve_virtual_method(result, methodHandle(THREAD, resolved_method),
1338 link_info.resolved_klass(),
1339 recv, receiver_klass,
1340 check_null_and_abstract, CHECK);
1341 }
1342
1343 // throws linktime exceptions
1344 Method* LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1345 TRAPS) {
1346 // normal method resolution
1347 Method* resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1348
1349 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1350 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1351
1352 // check if private interface method
1353 Klass* resolved_klass = link_info.resolved_klass();
1354 Klass* current_klass = link_info.current_klass();
1355
1356 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1357 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1358 ResourceMark rm(THREAD);
1359 stringStream ss;
1360 ss.print("private interface method requires invokespecial, not invokevirtual: method '");
1361 resolved_method->print_external_name(&ss);
1362 ss.print("', caller-class: %s",
1363 (current_klass == NULL ? "<null>" : current_klass->internal_name()));
1364 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1365 }
1366
1367 // check if not static
1368 if (resolved_method->is_static()) {
1369 ResourceMark rm(THREAD);
1370 stringStream ss;
1371 ss.print("Expecting non-static method '");
1372 resolved_method->print_external_name(&ss);
1373 ss.print("'");
1374 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1375 }
1376
1377 if (log_develop_is_enabled(Trace, vtables)) {
1378 trace_method_resolution("invokevirtual resolved method: caller-class:",
1379 current_klass, resolved_klass, resolved_method, false);
1380 }
1381
1382 return resolved_method;
1383 }
1384
1385 // throws runtime exceptions
1386 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1387 const methodHandle& resolved_method,
1388 Klass* resolved_klass,
1389 Handle recv,
1390 Klass* recv_klass,
1391 bool check_null_and_abstract,
1392 TRAPS) {
1393
1394 // setup default return values
1395 int vtable_index = Method::invalid_vtable_index;
1396 methodHandle selected_method;
1397
1398 // runtime method resolution
1399 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1400 THROW(vmSymbols::java_lang_NullPointerException());
1401 }
1402
1403 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1404 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1405 // a missing receiver might result in a bogus lookup.
1406 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1407
1408 // do lookup based on receiver klass using the vtable index
1409 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1410 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1411 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1412
1413 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1414 } else {
1415 // at this point we are sure that resolved_method is virtual and not
1416 // a default or miranda method; therefore, it must have a valid vtable index.
1417 assert(!resolved_method->has_itable_index(), "");
1418 vtable_index = resolved_method->vtable_index();
1419 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1420 // methods, or for final methods. Private methods never appear in the vtable
1421 // and never override other methods. As an optimization, final methods are
1422 // never put in the vtable, unless they override an existing method.
1423 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1424 // resolved method, and it can never be changed by an override.
1425 if (vtable_index == Method::nonvirtual_vtable_index) {
1426 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1427 selected_method = resolved_method;
1428 } else {
1429 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1430 }
1431 }
1432
1433 // check if method exists
1434 if (selected_method.is_null()) {
1435 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1436 }
1437
1438 // check if abstract
1439 if (check_null_and_abstract && selected_method->is_abstract()) {
1440 // Pass arguments for generating a verbose error message.
1441 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1442 }
1443
1444 if (log_develop_is_enabled(Trace, vtables)) {
1445 trace_method_resolution("invokevirtual selected method: receiver-class:",
1446 recv_klass, resolved_klass, selected_method(),
1447 false, vtable_index);
1448 }
1449 // setup result
1450 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1451 }
1452
1453 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1454 const LinkInfo& link_info,
1455 bool check_null_and_abstract, TRAPS) {
1456 // throws linktime exceptions
1457 Method* resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1458 methodHandle mh(THREAD, resolved_method);
1459 runtime_resolve_interface_method(result, mh, link_info.resolved_klass(),
1460 recv, recv_klass, check_null_and_abstract, CHECK);
1461 }
1462
1463 Method* LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1464 TRAPS) {
1465 // normal interface method resolution
1466 Method* resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1467 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1468 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1469
1470 return resolved_method;
1471 }
1472
1473 // throws runtime exceptions
1474 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1475 const methodHandle& resolved_method,
1476 Klass* resolved_klass,
1477 Handle recv,
1478 Klass* recv_klass,
1479 bool check_null_and_abstract, TRAPS) {
1480
1481 // check if receiver exists
1482 if (check_null_and_abstract && recv.is_null()) {
1483 THROW(vmSymbols::java_lang_NullPointerException());
1484 }
1485
1486 // check if receiver klass implements the resolved interface
1487 if (!recv_klass->is_subtype_of(resolved_klass)) {
1488 ResourceMark rm(THREAD);
1489 char buf[200];
1490 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1491 recv_klass->external_name(),
1492 resolved_klass->external_name());
1493 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1494 }
1495
1496 methodHandle selected_method = resolved_method;
1497
1498 // resolve the method in the receiver class, unless it is private
1499 if (!resolved_method()->is_private()) {
1500 // do lookup based on receiver klass
1501 // This search must match the linktime preparation search for itable initialization
1502 // to correctly enforce loader constraints for interface method inheritance.
1503 // Private methods are skipped as the resolved method was not private.
1504 Method* method = lookup_instance_method_in_klasses(recv_klass,
1505 resolved_method->name(),
1506 resolved_method->signature(),
1507 Klass::skip_private, CHECK);
1508 selected_method = methodHandle(THREAD, method);
1509
1510 if (selected_method.is_null() && !check_null_and_abstract) {
1511 // In theory this is a harmless placeholder value, but
1512 // in practice leaving in null affects the nsk default method tests.
1513 // This needs further study.
1514 selected_method = resolved_method;
1515 }
1516 // check if method exists
1517 if (selected_method.is_null()) {
1518 // Pass arguments for generating a verbose error message.
1519 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1520 }
1521 // check access
1522 // Throw Illegal Access Error if selected_method is not public.
1523 if (!selected_method->is_public()) {
1524 ResourceMark rm(THREAD);
1525 stringStream ss;
1526 ss.print("'");
1527 Method::print_external_name(&ss, recv_klass, selected_method->name(), selected_method->signature());
1528 ss.print("'");
1529 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1530 }
1531 // check if abstract
1532 if (check_null_and_abstract && selected_method->is_abstract()) {
1533 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1534 }
1535 }
1536
1537 if (log_develop_is_enabled(Trace, itables)) {
1538 trace_method_resolution("invokeinterface selected method: receiver-class:",
1539 recv_klass, resolved_klass, selected_method(), true);
1540 }
1541 // setup result
1542 if (resolved_method->has_vtable_index()) {
1543 int vtable_index = resolved_method->vtable_index();
1544 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1545 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1546 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1547 } else if (resolved_method->has_itable_index()) {
1548 int itable_index = resolved_method()->itable_index();
1549 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1550 result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
1551 } else {
1552 int index = resolved_method->vtable_index();
1553 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1554 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1555 assert(resolved_method()->is_private() ||
1556 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1557 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1558 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1559 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1560 result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, index, CHECK);
1561 }
1562 }
1563
1564
1565 Method* LinkResolver::linktime_resolve_interface_method_or_null(
1566 const LinkInfo& link_info) {
1567 EXCEPTION_MARK;
1568 Method* method_result = linktime_resolve_interface_method(link_info, THREAD);
1569 if (HAS_PENDING_EXCEPTION) {
1570 CLEAR_PENDING_EXCEPTION;
1571 return NULL;
1572 } else {
1573 return method_result;
1574 }
1575 }
1576
1577 Method* LinkResolver::linktime_resolve_virtual_method_or_null(
1578 const LinkInfo& link_info) {
1579 EXCEPTION_MARK;
1580 Method* method_result = linktime_resolve_virtual_method(link_info, THREAD);
1581 if (HAS_PENDING_EXCEPTION) {
1582 CLEAR_PENDING_EXCEPTION;
1583 return NULL;
1584 } else {
1585 return method_result;
1586 }
1587 }
1588
1589 Method* LinkResolver::resolve_virtual_call_or_null(
1590 Klass* receiver_klass,
1591 const LinkInfo& link_info) {
1592 EXCEPTION_MARK;
1593 CallInfo info;
1594 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1595 if (HAS_PENDING_EXCEPTION) {
1596 CLEAR_PENDING_EXCEPTION;
1597 return NULL;
1598 }
1599 return info.selected_method();
1600 }
1601
1602 Method* LinkResolver::resolve_interface_call_or_null(
1603 Klass* receiver_klass,
1604 const LinkInfo& link_info) {
1605 EXCEPTION_MARK;
1606 CallInfo info;
1607 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1608 if (HAS_PENDING_EXCEPTION) {
1609 CLEAR_PENDING_EXCEPTION;
1610 return NULL;
1611 }
1612 return info.selected_method();
1613 }
1614
1615 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1616 const LinkInfo& link_info) {
1617 EXCEPTION_MARK;
1618 CallInfo info;
1619 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1620 /*check_null_or_abstract*/false, THREAD);
1621 if (HAS_PENDING_EXCEPTION) {
1622 CLEAR_PENDING_EXCEPTION;
1623 return Method::invalid_vtable_index;
1624 }
1625 return info.vtable_index();
1626 }
1627
1628 Method* LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1629 EXCEPTION_MARK;
1630 CallInfo info;
1631 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1632 if (HAS_PENDING_EXCEPTION) {
1633 CLEAR_PENDING_EXCEPTION;
1634 return NULL;
1635 }
1636 return info.selected_method();
1637 }
1638
1639 Method* LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1640 EXCEPTION_MARK;
1641 CallInfo info;
1642 resolve_special_call(info, Handle(), link_info, THREAD);
1643 if (HAS_PENDING_EXCEPTION) {
1644 CLEAR_PENDING_EXCEPTION;
1645 return NULL;
1646 }
1647 return info.selected_method();
1648 }
1649
1650
1651
1652 //------------------------------------------------------------------------------------------------------------------------
1653 // ConstantPool entries
1654
1655 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1656 switch (byte) {
1657 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1658 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1659 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1660 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1661 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1662 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1663 default : break;
1664 }
1665 return;
1666 }
1667
1668 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1669 const methodHandle& attached_method,
1670 Bytecodes::Code byte, TRAPS) {
1671 Klass* defc = attached_method->method_holder();
1672 Symbol* name = attached_method->name();
1673 Symbol* type = attached_method->signature();
1674 LinkInfo link_info(defc, name, type);
1675 switch(byte) {
1676 case Bytecodes::_invokevirtual:
1677 resolve_virtual_call(result, recv, recv->klass(), link_info,
1678 /*check_null_and_abstract=*/true, CHECK);
1679 break;
1680 case Bytecodes::_invokeinterface:
1681 resolve_interface_call(result, recv, recv->klass(), link_info,
1682 /*check_null_and_abstract=*/true, CHECK);
1683 break;
1684 case Bytecodes::_invokestatic:
1685 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1686 break;
1687 case Bytecodes::_invokespecial:
1688 resolve_special_call(result, recv, link_info, CHECK);
1689 break;
1690 default:
1691 fatal("bad call: %s", Bytecodes::name(byte));
1692 break;
1693 }
1694 }
1695
1696 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1697 LinkInfo link_info(pool, index, CHECK);
1698 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1699 }
1700
1701
1702 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1703 const constantPoolHandle& pool, int index, TRAPS) {
1704 LinkInfo link_info(pool, index, CHECK);
1705 resolve_special_call(result, recv, link_info, CHECK);
1706 }
1707
1708
1709 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1710 const constantPoolHandle& pool, int index,
1711 TRAPS) {
1712
1713 LinkInfo link_info(pool, index, CHECK);
1714 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1715 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1716 }
1717
1718
1719 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1720 LinkInfo link_info(pool, index, CHECK);
1721 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1722 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1723 }
1724
1725
1726 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1727 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1728 LinkInfo link_info(pool, index, CHECK);
1729 if (TraceMethodHandles) {
1730 ResourceMark rm(THREAD);
1731 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1732 link_info.signature()->as_C_string());
1733 }
1734 resolve_handle_call(result, link_info, CHECK);
1735 }
1736
1737 void LinkResolver::resolve_handle_call(CallInfo& result,
1738 const LinkInfo& link_info,
1739 TRAPS) {
1740 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1741 Klass* resolved_klass = link_info.resolved_klass();
1742 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1743 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1744 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1745 Handle resolved_appendix;
1746 Method* resolved_method = lookup_polymorphic_method(link_info, &resolved_appendix, CHECK);
1747 result.set_handle(resolved_klass, methodHandle(THREAD, resolved_method), resolved_appendix, CHECK);
1748 }
1749
1750 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int indy_index, TRAPS) {
1751 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(indy_index);
1752 int pool_index = cpce->constant_pool_index();
1753
1754 // Resolve the bootstrap specifier (BSM + optional arguments).
1755 BootstrapInfo bootstrap_specifier(pool, pool_index, indy_index);
1756
1757 // Check if CallSite has been bound already or failed already, and short circuit:
1758 {
1759 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1760 if (is_done) return;
1761 }
1762
1763 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1764 // reference to a method handle which will be the bootstrap method for a dynamic
1765 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1766 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1767 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1768 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1769 // this bootstrap method will encounter the resolution of MethodHandleInError.
1770
1771 resolve_dynamic_call(result, bootstrap_specifier, CHECK);
1772
1773 if (TraceMethodHandles) {
1774 bootstrap_specifier.print_msg_on(tty, "resolve_invokedynamic");
1775 }
1776
1777 // The returned linkage result is provisional up to the moment
1778 // the interpreter or runtime performs a serialized check of
1779 // the relevant CPCE::f1 field. This is done by the caller
1780 // of this method, via CPCE::set_dynamic_call, which uses
1781 // an ObjectLocker to do the final serialization of updates
1782 // to CPCE state, including f1.
1783 }
1784
1785 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1786 BootstrapInfo& bootstrap_specifier,
1787 TRAPS) {
1788 // JSR 292: this must resolve to an implicitly generated method
1789 // such as MH.linkToCallSite(*...) or some other call-site shape.
1790 // The appendix argument is likely to be a freshly-created CallSite.
1791 // It may also be a MethodHandle from an unwrapped ConstantCallSite,
1792 // or any other reference. The resolved_method as well as the appendix
1793 // are both recorded together via CallInfo::set_handle.
1794 SystemDictionary::invoke_bootstrap_method(bootstrap_specifier, THREAD);
1795 Exceptions::wrap_dynamic_exception(THREAD);
1796
1797 if (HAS_PENDING_EXCEPTION) {
1798 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1799 // Let any random low-level IE or SOE or OOME just bleed through.
1800 // Basically we pretend that the bootstrap method was never called,
1801 // if it fails this way: We neither record a successful linkage,
1802 // nor do we memorize a LE for posterity.
1803 return;
1804 }
1805 // JVMS 5.4.3 says: If an attempt by the Java Virtual Machine to resolve
1806 // a symbolic reference fails because an error is thrown that is an
1807 // instance of LinkageError (or a subclass), then subsequent attempts to
1808 // resolve the reference always fail with the same error that was thrown
1809 // as a result of the initial resolution attempt.
1810 bool recorded_res_status = bootstrap_specifier.save_and_throw_indy_exc(CHECK);
1811 if (!recorded_res_status) {
1812 // Another thread got here just before we did. So, either use the method
1813 // that it resolved or throw the LinkageError exception that it threw.
1814 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1815 if (is_done) return;
1816 }
1817 assert(bootstrap_specifier.invokedynamic_cp_cache_entry()->indy_resolution_failed(),
1818 "Resolution failure flag wasn't set");
1819 }
1820
1821 bootstrap_specifier.resolve_newly_linked_invokedynamic(result, CHECK);
1822 // Exceptions::wrap_dynamic_exception not used because
1823 // set_handle doesn't throw linkage errors
1824 }
1825
1826 // Selected method is abstract.
1827 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1828 const methodHandle& selected_method,
1829 Klass *recv_klass, TRAPS) {
1830 Klass *resolved_klass = resolved_method->method_holder();
1831 ResourceMark rm(THREAD);
1832 stringStream ss;
1833
1834 if (recv_klass != NULL) {
1835 ss.print("Receiver class %s does not define or inherit an "
1836 "implementation of the",
1837 recv_klass->external_name());
1838 } else {
1839 ss.print("Missing implementation of");
1840 }
1841
1842 assert(resolved_method.not_null(), "Sanity");
1843 ss.print(" resolved method '%s%s",
1844 resolved_method->is_abstract() ? "abstract " : "",
1845 resolved_method->is_private() ? "private " : "");
1846 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1847 ss.print(" %s(", resolved_method->name()->as_C_string());
1848 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1849 ss.print(")' of %s %s.",
1850 resolved_klass->external_kind(),
1851 resolved_klass->external_name());
1852
1853 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1854 ss.print(" Selected method is '%s%s",
1855 selected_method->is_abstract() ? "abstract " : "",
1856 selected_method->is_private() ? "private " : "");
1857 selected_method->print_external_name(&ss);
1858 ss.print("'.");
1859 }
1860
1861 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1862 }