1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/defaultMethods.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "gc/shared/collectedHeap.inline.hpp"
33 #include "interpreter/bytecode.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logStream.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/objArrayOop.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "prims/jvm.h"
45 #include "prims/methodHandles.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "runtime/compilationPolicy.hpp"
48 #include "runtime/fieldDescriptor.hpp"
49 #include "runtime/frame.inline.hpp"
50 #include "runtime/handles.inline.hpp"
51 #include "runtime/reflection.hpp"
52 #include "runtime/signature.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/vmThread.hpp"
55
56
57 //------------------------------------------------------------------------------------------------------------------------
58 // Implementation of CallInfo
59
60
61 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
62 int vtable_index = Method::nonvirtual_vtable_index;
63 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
64 }
65
66
67 void CallInfo::set_interface(Klass* resolved_klass,
68 Klass* selected_klass,
69 const methodHandle& resolved_method,
70 const methodHandle& selected_method,
71 int itable_index, TRAPS) {
72 // This is only called for interface methods. If the resolved_method
73 // comes from java/lang/Object, it can be the subject of a virtual call, so
74 // we should pick the vtable index from the resolved method.
75 // In that case, the caller must call set_virtual instead of set_interface.
76 assert(resolved_method->method_holder()->is_interface(), "");
77 assert(itable_index == resolved_method()->itable_index(), "");
78 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
79 }
80
81 void CallInfo::set_virtual(Klass* resolved_klass,
82 Klass* selected_klass,
83 const methodHandle& resolved_method,
84 const methodHandle& selected_method,
85 int vtable_index, TRAPS) {
86 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
87 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
88 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
89 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
90 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
91 }
92
93 void CallInfo::set_handle(const methodHandle& resolved_method,
94 Handle resolved_appendix,
95 Handle resolved_method_type, TRAPS) {
96 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
97 }
98
99 void CallInfo::set_handle(Klass* resolved_klass,
100 const methodHandle& resolved_method,
101 Handle resolved_appendix,
102 Handle resolved_method_type, TRAPS) {
103 if (resolved_method.is_null()) {
104 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
105 }
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 _resolved_method_type = resolved_method_type;
114 }
115
116 void CallInfo::set_common(Klass* resolved_klass,
117 Klass* selected_klass,
118 const methodHandle& resolved_method,
119 const methodHandle& selected_method,
120 CallKind kind,
121 int index,
122 TRAPS) {
123 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
124 _resolved_klass = resolved_klass;
125 _selected_klass = selected_klass;
126 _resolved_method = resolved_method;
127 _selected_method = selected_method;
128 _call_kind = kind;
129 _call_index = index;
130 _resolved_appendix = Handle();
131 DEBUG_ONLY(verify()); // verify before making side effects
132
133 CompilationPolicy::compile_if_required(selected_method, THREAD);
134 }
135
136 // utility query for unreflecting a method
137 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
138 Klass* resolved_method_holder = resolved_method->method_holder();
139 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
140 resolved_klass = resolved_method_holder;
141 }
142 _resolved_klass = resolved_klass;
143 _selected_klass = resolved_klass;
144 _resolved_method = resolved_method;
145 _selected_method = resolved_method;
146 // classify:
147 CallKind kind = CallInfo::unknown_kind;
148 int index = resolved_method->vtable_index();
149 if (resolved_method->can_be_statically_bound()) {
150 kind = CallInfo::direct_call;
151 } else if (!resolved_method_holder->is_interface()) {
152 // Could be an Object method inherited into an interface, but still a vtable call.
153 kind = CallInfo::vtable_call;
154 } else if (!resolved_klass->is_interface()) {
155 // A default or miranda method. Compute the vtable index.
156 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
157 resolved_method);
158 assert(index >= 0 , "we should have valid vtable index at this point");
159
160 kind = CallInfo::vtable_call;
161 } else if (resolved_method->has_vtable_index()) {
162 // Can occur if an interface redeclares a method of Object.
163
164 #ifdef ASSERT
165 // Ensure that this is really the case.
166 Klass* object_klass = SystemDictionary::Object_klass();
167 Method * object_resolved_method = object_klass->vtable().method_at(index);
168 assert(object_resolved_method->name() == resolved_method->name(),
169 "Object and interface method names should match at vtable index %d, %s != %s",
170 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
171 assert(object_resolved_method->signature() == resolved_method->signature(),
172 "Object and interface method signatures should match at vtable index %d, %s != %s",
173 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
174 #endif // ASSERT
175
176 kind = CallInfo::vtable_call;
177 } else {
178 // A regular interface call.
179 kind = CallInfo::itable_call;
180 index = resolved_method->itable_index();
181 }
182 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
183 _call_kind = kind;
184 _call_index = index;
185 _resolved_appendix = Handle();
186 // Find or create a ResolvedMethod instance for this Method*
187 set_resolved_method_name(CHECK);
188
189 DEBUG_ONLY(verify());
190 }
191
192 void CallInfo::set_resolved_method_name(TRAPS) {
193 Method* m = _resolved_method();
194 assert(m != NULL, "Should already have a Method*");
195 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
196 _resolved_method_name = Handle(THREAD, rmethod_name);
197 }
198
199 #ifdef ASSERT
200 void CallInfo::verify() {
201 switch (call_kind()) { // the meaning and allowed value of index depends on kind
202 case CallInfo::direct_call:
203 if (_call_index == Method::nonvirtual_vtable_index) break;
204 // else fall through to check vtable index:
205 case CallInfo::vtable_call:
206 assert(resolved_klass()->verify_vtable_index(_call_index), "");
207 break;
208 case CallInfo::itable_call:
209 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
210 break;
211 case CallInfo::unknown_kind:
212 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
213 break;
214 default:
215 fatal("Unexpected call kind %d", call_kind());
216 }
217 }
218 #endif //ASSERT
219
220 #ifndef PRODUCT
221 void CallInfo::print() {
222 ResourceMark rm;
223 const char* kindstr;
224 switch (_call_kind) {
225 case direct_call: kindstr = "direct"; break;
226 case vtable_call: kindstr = "vtable"; break;
227 case itable_call: kindstr = "itable"; break;
228 default : kindstr = "unknown"; break;
229 }
230 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
231 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
232 }
233 #endif
234
235 //------------------------------------------------------------------------------------------------------------------------
236 // Implementation of LinkInfo
237
238 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
239 // resolve klass
240 _resolved_klass = pool->klass_ref_at(index, CHECK);
241
242 // Get name, signature, and static klass
243 _name = pool->name_ref_at(index);
244 _signature = pool->signature_ref_at(index);
245 _tag = pool->tag_ref_at(index);
246 _current_klass = pool->pool_holder();
247 _current_method = current_method;
248
249 // Coming from the constant pool always checks access
250 _check_access = true;
251 }
252
253 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
254 // resolve klass
255 _resolved_klass = pool->klass_ref_at(index, CHECK);
256
257 // Get name, signature, and static klass
258 _name = pool->name_ref_at(index);
259 _signature = pool->signature_ref_at(index);
260 _tag = pool->tag_ref_at(index);
261 _current_klass = pool->pool_holder();
262 _current_method = methodHandle();
263
264 // Coming from the constant pool always checks access
265 _check_access = true;
266 }
267
268 char* LinkInfo::method_string() const {
269 return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature);
270 }
271
272 #ifndef PRODUCT
273 void LinkInfo::print() {
274 ResourceMark rm;
275 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
276 _resolved_klass->name()->as_C_string(),
277 _name->as_C_string(),
278 _signature->as_C_string(),
279 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
280 _check_access ? "true" : "false");
281 }
282 #endif // PRODUCT
283 //------------------------------------------------------------------------------------------------------------------------
284 // Klass resolution
285
286 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass, TRAPS) {
287 Reflection::VerifyClassAccessResults vca_result =
288 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(sel_klass), true);
289 if (vca_result != Reflection::ACCESS_OK) {
290 ResourceMark rm(THREAD);
291 char* msg = Reflection::verify_class_access_msg(ref_klass,
292 InstanceKlass::cast(sel_klass),
293 vca_result);
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",
299 sel_klass->external_name(),
300 ref_klass->external_name());
301 } else {
302 // Use module specific message returned by verify_class_access_msg().
303 Exceptions::fthrow(
304 THREAD_AND_LOCATION,
305 vmSymbols::java_lang_IllegalAccessError(),
306 "%s", msg);
307 }
308 }
309 }
310
311 //------------------------------------------------------------------------------------------------------------------------
312 // Method resolution
313 //
314 // According to JVM spec. $5.4.3c & $5.4.3d
315
316 // Look up method in klasses, including static methods
317 // Then look up local default methods
318 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
319 bool checkpolymorphism,
320 bool in_imethod_resolve) {
321 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
322
323 Klass* klass = link_info.resolved_klass();
324 Symbol* name = link_info.name();
325 Symbol* signature = link_info.signature();
326
327 // Ignore overpasses so statics can be found during resolution
328 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
329
330 if (klass->is_array_klass()) {
331 // Only consider klass and super klass for arrays
332 return result;
333 }
334
335 InstanceKlass* ik = InstanceKlass::cast(klass);
336
337 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
338 // ignore static and non-public methods of java.lang.Object,
339 // like clone, finalize, registerNatives.
340 if (in_imethod_resolve &&
341 result != NULL &&
342 ik->is_interface() &&
343 (result->is_static() || !result->is_public()) &&
344 result->method_holder() == SystemDictionary::Object_klass()) {
345 result = NULL;
346 }
347
348 // Before considering default methods, check for an overpass in the
349 // current class if a method has not been found.
350 if (result == NULL) {
351 result = ik->find_method(name, signature);
352 }
353
354 if (result == NULL) {
355 Array<Method*>* default_methods = ik->default_methods();
356 if (default_methods != NULL) {
357 result = InstanceKlass::find_method(default_methods, name, signature);
358 }
359 }
360
361 if (checkpolymorphism && result != NULL) {
362 vmIntrinsics::ID iid = result->intrinsic_id();
363 if (MethodHandles::is_signature_polymorphic(iid)) {
364 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
365 return NULL;
366 }
367 }
368 return result;
369 }
370
371 // returns first instance method
372 // Looks up method in classes, then looks up local default methods
373 methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
374 Symbol* name,
375 Symbol* signature, TRAPS) {
376 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
377
378 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
379 Klass* super_klass = result->method_holder()->super();
380 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
381 }
382
383 if (klass->is_array_klass()) {
384 // Only consider klass and super klass for arrays
385 return methodHandle(THREAD, result);
386 }
387
388 if (result == NULL) {
389 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
390 if (default_methods != NULL) {
391 result = InstanceKlass::find_method(default_methods, name, signature);
392 assert(result == NULL || !result->is_static(), "static defaults not allowed");
393 }
394 }
395 return methodHandle(THREAD, result);
396 }
397
398 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
399 const methodHandle& resolved_method) {
400
401 int vtable_index = Method::invalid_vtable_index;
402 Symbol* name = resolved_method->name();
403 Symbol* signature = resolved_method->signature();
404 InstanceKlass* ik = InstanceKlass::cast(klass);
405
406 // First check in default method array
407 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
408 int index = InstanceKlass::find_method_index(ik->default_methods(),
409 name, signature, Klass::find_overpass,
410 Klass::find_static, Klass::find_private);
411 if (index >= 0 ) {
412 vtable_index = ik->default_vtable_indices()->at(index);
413 }
414 }
415 if (vtable_index == Method::invalid_vtable_index) {
416 // get vtable_index for miranda methods
417 klassVtable vt = ik->vtable();
418 vtable_index = vt.index_of_miranda(name, signature);
419 }
420 return vtable_index;
421 }
422
423 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
424 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
425
426 // Specify 'true' in order to skip default methods when searching the
427 // interfaces. Function lookup_method_in_klasses() already looked for
428 // the method in the default methods table.
429 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
430 }
431
432 methodHandle LinkResolver::lookup_polymorphic_method(
433 const LinkInfo& link_info,
434 Handle *appendix_result_or_null,
435 Handle *method_type_result,
436 TRAPS) {
437 Klass* klass = link_info.resolved_klass();
438 Symbol* name = link_info.name();
439 Symbol* full_signature = link_info.signature();
440
441 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
442 if (TraceMethodHandles) {
443 ResourceMark rm(THREAD);
444 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
445 vmIntrinsics::name_at(iid), klass->external_name(),
446 name->as_C_string(), full_signature->as_C_string());
447 }
448 if ((klass == SystemDictionary::MethodHandle_klass() ||
449 klass == SystemDictionary::VarHandle_klass()) &&
450 iid != vmIntrinsics::_none) {
451 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
452 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
453 // Do not erase last argument type (MemberName) if it is a static linkTo method.
454 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
455 TempNewSymbol basic_signature =
456 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
457 if (TraceMethodHandles) {
458 ResourceMark rm(THREAD);
459 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
460 name->as_C_string(),
461 full_signature->as_C_string(),
462 basic_signature->as_C_string());
463 }
464 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
465 basic_signature,
466 CHECK_NULL);
467 if (result.not_null()) {
468 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
469 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
470 assert(basic_signature == result->signature(), "predict the result signature");
471 if (TraceMethodHandles) {
472 ttyLocker ttyl;
473 tty->print("lookup_polymorphic_method => intrinsic ");
474 result->print_on(tty);
475 }
476 }
477 return result;
478 } else if (iid == vmIntrinsics::_invokeGeneric
479 && THREAD->can_call_java()
480 && appendix_result_or_null != NULL) {
481 // This is a method with type-checking semantics.
482 // We will ask Java code to spin an adapter method for it.
483 if (!MethodHandles::enabled()) {
484 // Make sure the Java part of the runtime has been booted up.
485 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
486 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
487 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
488 Handle(),
489 Handle(),
490 true,
491 CHECK_NULL);
492 }
493 }
494
495 Handle appendix;
496 Handle method_type;
497 methodHandle result = SystemDictionary::find_method_handle_invoker(
498 klass,
499 name,
500 full_signature,
501 link_info.current_klass(),
502 &appendix,
503 &method_type,
504 CHECK_NULL);
505 if (TraceMethodHandles) {
506 ttyLocker ttyl;
507 tty->print("lookup_polymorphic_method => (via Java) ");
508 result->print_on(tty);
509 tty->print(" lookup_polymorphic_method => appendix = ");
510 if (appendix.is_null()) tty->print_cr("(none)");
511 else appendix->print_on(tty);
512 }
513 if (result.not_null()) {
514 #ifdef ASSERT
515 ResourceMark rm(THREAD);
516
517 TempNewSymbol basic_signature =
518 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
519 int actual_size_of_params = result->size_of_parameters();
520 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
521 // +1 for MethodHandle.this, +1 for trailing MethodType
522 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
523 if (appendix.not_null()) expected_size_of_params += 1;
524 if (actual_size_of_params != expected_size_of_params) {
525 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
526 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
527 result->print();
528 }
529 assert(actual_size_of_params == expected_size_of_params,
530 "%d != %d", actual_size_of_params, expected_size_of_params);
531 #endif //ASSERT
532
533 assert(appendix_result_or_null != NULL, "");
534 (*appendix_result_or_null) = appendix;
535 (*method_type_result) = method_type;
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 if (!Reflection::verify_field_access(ref_klass,
571 resolved_klass,
572 sel_klass,
573 flags,
574 true)) {
575 ResourceMark rm(THREAD);
576 Exceptions::fthrow(
577 THREAD_AND_LOCATION,
578 vmSymbols::java_lang_IllegalAccessError(),
579 "tried to access method %s.%s%s from class %s",
580 sel_klass->external_name(),
581 sel_method->name()->as_C_string(),
582 sel_method->signature()->as_C_string(),
583 ref_klass->external_name()
584 );
585 return;
586 }
587 }
588
589 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
590 const constantPoolHandle& pool, int index, TRAPS) {
591 // This method is used only
592 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
593 // and
594 // (2) in Bytecode_invoke::static_target
595 // It appears to fail when applied to an invokeinterface call site.
596 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
597 // resolve klass
598 if (code == Bytecodes::_invokedynamic) {
599 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
600 Symbol* method_name = vmSymbols::invoke_name();
601 Symbol* method_signature = pool->signature_ref_at(index);
602 Klass* current_klass = pool->pool_holder();
603 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
604 return resolve_method(link_info, code, THREAD);
605 }
606
607 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
608 Klass* resolved_klass = link_info.resolved_klass();
609
610 if (pool->has_preresolution()
611 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
612 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
613 Method* result = ConstantPool::method_at_if_loaded(pool, index);
614 if (result != NULL) {
615 return methodHandle(THREAD, result);
616 }
617 }
618
619 if (code == Bytecodes::_invokeinterface) {
620 return resolve_interface_method(link_info, code, THREAD);
621 } else if (code == Bytecodes::_invokevirtual) {
622 return resolve_method(link_info, code, THREAD);
623 } else if (!resolved_klass->is_interface()) {
624 return resolve_method(link_info, code, THREAD);
625 } else {
626 return resolve_interface_method(link_info, code, THREAD);
627 }
628 }
629
630 // Check and print a loader constraint violation message for method or interface method
631 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
632 const methodHandle& resolved_method,
633 const char* method_type, TRAPS) {
634 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
635 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
636
637 ResourceMark rm(THREAD);
638 Symbol* failed_type_symbol =
639 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
640 resolved_loader, true, CHECK);
641 if (failed_type_symbol != NULL) {
642 const char* msg = "loader constraint violation: when resolving %s"
643 " \"%s\" the class loader (instance of %s) of the current class, %s,"
644 " and the class loader (instance of %s) for the method's defining class, %s, have"
645 " different Class objects for the type %s used in the signature";
646 char* sig = link_info.method_string();
647 const char* loader1_name = SystemDictionary::loader_name(current_loader());
648 char* current = link_info.current_klass()->name()->as_C_string();
649 const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
650 char* target = resolved_method->method_holder()->name()->as_C_string();
651 char* failed_type_name = failed_type_symbol->as_C_string();
652 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
653 strlen(current) + strlen(loader2_name) + strlen(target) +
654 strlen(failed_type_name) + strlen(method_type) + 1;
655 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
656 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
657 target, failed_type_name);
658 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
659 }
660 }
661
662 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
663 Klass* current_klass,
664 Klass* sel_klass, TRAPS) {
665 Handle ref_loader(THREAD, current_klass->class_loader());
666 Handle sel_loader(THREAD, sel_klass->class_loader());
667
668 ResourceMark rm(THREAD); // needed for check_signature_loaders
669 Symbol* failed_type_symbol =
670 SystemDictionary::check_signature_loaders(sig,
671 ref_loader, sel_loader,
672 false,
673 CHECK);
674 if (failed_type_symbol != NULL) {
675 const char* msg = "loader constraint violation: when resolving field"
676 " \"%s\" the class loader (instance of %s) of the referring class, "
677 "%s, and the class loader (instance of %s) for the field's resolved "
678 "type, %s, have different Class objects for that type";
679 char* field_name = field->as_C_string();
680 const char* loader1_name = SystemDictionary::loader_name(ref_loader());
681 char* sel = sel_klass->name()->as_C_string();
682 const char* loader2_name = SystemDictionary::loader_name(sel_loader());
683 char* failed_type_name = failed_type_symbol->as_C_string();
684 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
685 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
686 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
687 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
688 failed_type_name);
689 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
690 }
691 }
692
693 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
694 Bytecodes::Code code, TRAPS) {
695
696 Handle nested_exception;
697 Klass* resolved_klass = link_info.resolved_klass();
698
699 // 1. For invokevirtual, cannot call an interface method
700 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
701 ResourceMark rm(THREAD);
702 char buf[200];
703 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
704 resolved_klass->external_name());
705 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
706 }
707
708 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
709 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
710 ResourceMark rm(THREAD);
711 char buf[200];
712 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
713 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
714 }
715
716 // 3. lookup method in resolved klass and its super klasses
717 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
718
719 // 4. lookup method in all the interfaces implemented by the resolved klass
720 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
721 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
722
723 if (resolved_method.is_null()) {
724 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
725 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
726 if (HAS_PENDING_EXCEPTION) {
727 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
728 CLEAR_PENDING_EXCEPTION;
729 }
730 }
731 }
732
733 // 5. method lookup failed
734 if (resolved_method.is_null()) {
735 ResourceMark rm(THREAD);
736 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
737 Method::name_and_sig_as_C_string(resolved_klass,
738 link_info.name(),
739 link_info.signature()),
740 nested_exception, NULL);
741 }
742
743 // 6. access checks, access checking may be turned off when calling from within the VM.
744 Klass* current_klass = link_info.current_klass();
745 if (link_info.check_access()) {
746 assert(current_klass != NULL , "current_klass should not be null");
747
748 // check if method can be accessed by the referring class
749 check_method_accessability(current_klass,
750 resolved_klass,
751 resolved_method->method_holder(),
752 resolved_method,
753 CHECK_NULL);
754
755 // check loader constraints
756 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
757 }
758
759 // For private method invocation we should only find the method in the resolved class.
760 // If that is not the case then we have a found a supertype method that we have nestmate
761 // access to.
762 // FIXME: the "ignoring xxx" part is for debugging only
763 if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) {
764 ResourceMark rm(THREAD);
765 DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);)
766 assert(is_nestmate, "was only expecting nestmates to get here!");
767 Exceptions::fthrow(
768 THREAD_AND_LOCATION,
769 vmSymbols::java_lang_NoSuchMethodError(),
770 "%s: method %s%s not found (ignoring %s)",
771 resolved_klass->external_name(),
772 resolved_method->name()->as_C_string(),
773 resolved_method->signature()->as_C_string(),
774 resolved_method->method_holder()->external_name()
775 );
776 return NULL;
777 }
778
779 return resolved_method;
780 }
781
782 static void trace_method_resolution(const char* prefix,
783 Klass* klass,
784 Klass* resolved_klass,
785 const methodHandle& method,
786 bool logitables,
787 int index = -1) {
788 #ifndef PRODUCT
789 ResourceMark rm;
790 Log(itables) logi;
791 LogStream lsi(logi.trace());
792 Log(vtables) logv;
793 LogStream lsv(logv.trace());
794 outputStream* st;
795 if (logitables) {
796 st = &lsi;
797 } else {
798 st = &lsv;
799 }
800 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
801 prefix,
802 (klass == NULL ? "<NULL>" : klass->internal_name()),
803 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
804 Method::name_and_sig_as_C_string(resolved_klass,
805 method->name(),
806 method->signature()),
807 method->method_holder()->internal_name());
808 method->print_linkage_flags(st);
809 if (index != -1) {
810 st->print("vtable_index:%d", index);
811 }
812 st->cr();
813 #endif // PRODUCT
814 }
815
816 // FIXME: update to correct version
817 #define VIRTUAL_PRIVATE_ACCESS_VERSION 53
818
819 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
820 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
821
822 Klass* resolved_klass = link_info.resolved_klass();
823
824 // check if klass is interface
825 if (!resolved_klass->is_interface()) {
826 ResourceMark rm(THREAD);
827 char buf[200];
828 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
829 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
830 }
831
832 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
833 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
834 ResourceMark rm(THREAD);
835 char buf[200];
836 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
837 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
838 }
839
840 // lookup method in this interface or its super, java.lang.Object
841 // JDK8: also look for static methods
842 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
843
844 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
845 // lookup method in all the super-interfaces
846 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
847 }
848
849 if (resolved_method.is_null()) {
850 // no method found
851 ResourceMark rm(THREAD);
852 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
853 Method::name_and_sig_as_C_string(resolved_klass,
854 link_info.name(),
855 link_info.signature()));
856 }
857
858 if (link_info.check_access()) {
859 // JDK8 adds non-public interface methods, and accessability check requirement
860 Klass* current_klass = link_info.current_klass();
861
862 assert(current_klass != NULL , "current_klass should not be null");
863
864 // check if method can be accessed by the referring class
865 check_method_accessability(current_klass,
866 resolved_klass,
867 resolved_method->method_holder(),
868 resolved_method,
869 CHECK_NULL);
870
871 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
872 }
873
874 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
875 ResourceMark rm(THREAD);
876 char buf[200];
877 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
878 Method::name_and_sig_as_C_string(resolved_klass,
879 resolved_method->name(), resolved_method->signature()));
880 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
881 }
882
883 if (code == Bytecodes::_invokeinterface && resolved_method->is_private()) {
884 Klass* current_klass = link_info.current_klass();
885 assert(current_klass != NULL, "current_klass should not be null for invokeinterface");
886 if (InstanceKlass::cast(current_klass)->major_version() < VIRTUAL_PRIVATE_ACCESS_VERSION) {
887 ResourceMark rm(THREAD);
888 char buf[200];
889 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s, caller-class:%s",
890 Method::name_and_sig_as_C_string(resolved_klass,
891 resolved_method->name(),
892 resolved_method->signature()),
893 current_klass->internal_name());
894 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
895 }
896 }
897
898 if (log_develop_is_enabled(Trace, itables)) {
899 char buf[200];
900 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
901 Bytecodes::name(code));
902 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
903 resolved_method, true);
904 }
905
906 return resolved_method;
907 }
908
909 //------------------------------------------------------------------------------------------------------------------------
910 // Field resolution
911
912 void LinkResolver::check_field_accessability(Klass* ref_klass,
913 Klass* resolved_klass,
914 Klass* sel_klass,
915 const fieldDescriptor& fd,
916 TRAPS) {
917 if (!Reflection::verify_field_access(ref_klass,
918 resolved_klass,
919 sel_klass,
920 fd.access_flags(),
921 true)) {
922 ResourceMark rm(THREAD);
923 Exceptions::fthrow(
924 THREAD_AND_LOCATION,
925 vmSymbols::java_lang_IllegalAccessError(),
926 "tried to access field %s.%s from class %s",
927 sel_klass->external_name(),
928 fd.name()->as_C_string(),
929 ref_klass->external_name()
930 );
931 return;
932 }
933 }
934
935 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
936 LinkInfo link_info(pool, index, method, CHECK);
937 resolve_field(fd, link_info, byte, true, CHECK);
938 }
939
940 void LinkResolver::resolve_field(fieldDescriptor& fd,
941 const LinkInfo& link_info,
942 Bytecodes::Code byte, bool initialize_class,
943 TRAPS) {
944 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
945 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
946 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
947 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
948
949 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
950 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
951 // Check if there's a resolved klass containing the field
952 Klass* resolved_klass = link_info.resolved_klass();
953 Symbol* field = link_info.name();
954 Symbol* sig = link_info.signature();
955
956 if (resolved_klass == NULL) {
957 ResourceMark rm(THREAD);
958 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
959 }
960
961 // Resolve instance field
962 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
963 // check if field exists; i.e., if a klass containing the field def has been selected
964 if (sel_klass == NULL) {
965 ResourceMark rm(THREAD);
966 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
967 }
968
969 if (!link_info.check_access())
970 // Access checking may be turned off when calling from within the VM.
971 return;
972
973 // check access
974 Klass* current_klass = link_info.current_klass();
975 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
976
977 // check for errors
978 if (is_static != fd.is_static()) {
979 ResourceMark rm(THREAD);
980 char msg[200];
981 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
982 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
983 }
984
985 // A final field can be modified only
986 // (1) by methods declared in the class declaring the field and
987 // (2) by the <clinit> method (in case of a static field)
988 // or by the <init> method (in case of an instance field).
989 if (is_put && fd.access_flags().is_final()) {
990 ResourceMark rm(THREAD);
991 stringStream ss;
992
993 if (sel_klass != current_klass) {
994 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
995 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
996 current_klass->external_name());
997 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
998 }
999
1000 if (fd.constants()->pool_holder()->major_version() >= 53) {
1001 methodHandle m = link_info.current_method();
1002 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
1003 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1004 fd.is_static() &&
1005 !m()->is_static_initializer());
1006 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1007 !fd.is_static() &&
1008 !m->is_object_initializer());
1009
1010 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1011 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1012 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1013 m()->name()->as_C_string(),
1014 is_static ? "<clinit>" : "<init>");
1015 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1016 }
1017 }
1018 }
1019
1020 // initialize resolved_klass if necessary
1021 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1022 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1023 //
1024 // note 2: we don't want to force initialization if we are just checking
1025 // if the field access is legal; e.g., during compilation
1026 if (is_static && initialize_class) {
1027 sel_klass->initialize(CHECK);
1028 }
1029
1030 if (sel_klass != current_klass) {
1031 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1032 }
1033
1034 // return information. note that the klass is set to the actual klass containing the
1035 // field, otherwise access of static fields in superclasses will not work.
1036 }
1037
1038
1039 //------------------------------------------------------------------------------------------------------------------------
1040 // Invoke resolution
1041 //
1042 // Naming conventions:
1043 //
1044 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1045 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1046 // resolved_klass the specified klass (i.e., specified via constant pool index)
1047 // recv_klass the receiver klass
1048
1049
1050 void LinkResolver::resolve_static_call(CallInfo& result,
1051 const LinkInfo& link_info,
1052 bool initialize_class, TRAPS) {
1053 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1054
1055 // The resolved class can change as a result of this resolution.
1056 Klass* resolved_klass = resolved_method->method_holder();
1057
1058 // Initialize klass (this should only happen if everything is ok)
1059 if (initialize_class && resolved_klass->should_be_initialized()) {
1060 resolved_klass->initialize(CHECK);
1061 // Use updated LinkInfo to reresolve with resolved method holder
1062 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1063 link_info.current_klass(),
1064 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1065 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1066 }
1067
1068 // setup result
1069 result.set_static(resolved_klass, resolved_method, CHECK);
1070 }
1071
1072 // throws linktime exceptions
1073 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1074
1075 Klass* resolved_klass = link_info.resolved_klass();
1076 methodHandle resolved_method;
1077 if (!resolved_klass->is_interface()) {
1078 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1079 } else {
1080 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1081 }
1082 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1083
1084 // check if static
1085 if (!resolved_method->is_static()) {
1086 ResourceMark rm(THREAD);
1087 char buf[200];
1088 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1089 resolved_method->name(),
1090 resolved_method->signature()));
1091 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1092 }
1093 return resolved_method;
1094 }
1095
1096
1097 void LinkResolver::resolve_special_call(CallInfo& result,
1098 Handle recv,
1099 const LinkInfo& link_info,
1100 TRAPS) {
1101 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1102 runtime_resolve_special_method(result, resolved_method,
1103 link_info.resolved_klass(),
1104 link_info.current_klass(),
1105 recv,
1106 link_info.check_access(), CHECK);
1107 }
1108
1109 // throws linktime exceptions
1110 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1111 TRAPS) {
1112
1113 // Invokespecial is called for multiple special reasons:
1114 // <init>
1115 // local private method invocation, for classes and interfaces
1116 // superclass.method, which can also resolve to a default method
1117 // and the selected method is recalculated relative to the direct superclass
1118 // superinterface.method, which explicitly does not check shadowing
1119 Klass* resolved_klass = link_info.resolved_klass();
1120 methodHandle resolved_method;
1121
1122 if (!resolved_klass->is_interface()) {
1123 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1124 } else {
1125 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1126 }
1127
1128 // check if method name is <init>, that it is found in same klass as static type
1129 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1130 resolved_method->method_holder() != resolved_klass) {
1131 ResourceMark rm(THREAD);
1132 Exceptions::fthrow(
1133 THREAD_AND_LOCATION,
1134 vmSymbols::java_lang_NoSuchMethodError(),
1135 "%s: method %s%s not found",
1136 resolved_klass->external_name(),
1137 resolved_method->name()->as_C_string(),
1138 resolved_method->signature()->as_C_string()
1139 );
1140 return NULL;
1141 }
1142
1143 // check that invokespecial's interface method reference is in a direct superinterface,
1144 // unless we are dealing with nestmates.
1145 Klass* current_klass = link_info.current_klass();
1146 if (current_klass != NULL && resolved_klass->is_interface()) {
1147 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1148 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1149 ck :
1150 InstanceKlass::cast(ck->host_klass());
1151 // Disable verification for the dynamically-generated reflection bytecodes.
1152 bool is_reflect = klass_to_check->is_subclass_of(
1153 SystemDictionary::reflect_MagicAccessorImpl_klass());
1154
1155 if (!is_reflect &&
1156 !klass_to_check->is_same_or_direct_interface(resolved_klass) &&
1157 (ck == klass_to_check && // don't check nestmate access for anonymous classes
1158 !klass_to_check->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD))) {
1159 ResourceMark rm(THREAD);
1160 char buf[200];
1161 jio_snprintf(buf, sizeof(buf),
1162 "Interface method reference: %s, is not in a direct superinterface of %s",
1163 Method::name_and_sig_as_C_string(resolved_klass,
1164 resolved_method->name(),
1165 resolved_method->signature()),
1166 current_klass->external_name());
1167 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1168 }
1169 }
1170
1171 // check if not static
1172 if (resolved_method->is_static()) {
1173 ResourceMark rm(THREAD);
1174 char buf[200];
1175 jio_snprintf(buf, sizeof(buf),
1176 "Expecting non-static method %s",
1177 Method::name_and_sig_as_C_string(resolved_klass,
1178 resolved_method->name(),
1179 resolved_method->signature()));
1180 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1181 }
1182
1183 // For private method invocation we should only find the method in the resolved class.
1184 // If that is not the case then we have a found a supertype method that we have nestmate
1185 // access to.
1186 // FIXME: the "ignoring xxx" part is for debugging only
1187 if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) {
1188 ResourceMark rm(THREAD);
1189 DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);)
1190 assert(is_nestmate, "was only expecting nestmates here!");
1191 Exceptions::fthrow(
1192 THREAD_AND_LOCATION,
1193 vmSymbols::java_lang_NoSuchMethodError(),
1194 "%s: method %s%s not found (ignoring %s)",
1195 resolved_klass->external_name(),
1196 resolved_method->name()->as_C_string(),
1197 resolved_method->signature()->as_C_string(),
1198 resolved_method->method_holder()->external_name()
1199 );
1200 return NULL;
1201 }
1202
1203 if (log_develop_is_enabled(Trace, itables)) {
1204 trace_method_resolution("invokespecial resolved method: caller-class:",
1205 current_klass, resolved_klass, resolved_method, true);
1206 }
1207
1208 return resolved_method;
1209 }
1210
1211 // throws runtime exceptions
1212 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1213 const methodHandle& resolved_method,
1214 Klass* resolved_klass,
1215 Klass* current_klass,
1216 Handle recv,
1217 bool check_access, TRAPS) {
1218
1219 // resolved method is selected method unless we have an old-style lookup
1220 // for a superclass method
1221 // Invokespecial for a superinterface, resolved method is selected method,
1222 // no checks for shadowing
1223 methodHandle sel_method(THREAD, resolved_method());
1224
1225 if (check_access &&
1226 // check if the method is not <init>
1227 resolved_method->name() != vmSymbols::object_initializer_name()
1228 ) {
1229 // check if this is an old-style super call and do a new lookup if so
1230 // a) check if ACC_SUPER flag is set for the current class
1231 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1232 // b) check if the class of the resolved_klass is a superclass
1233 // (not supertype in order to exclude interface classes) of the current class.
1234 // This check is not performed for super.invoke for interface methods
1235 // in super interfaces.
1236 current_klass->is_subclass_of(resolved_klass) &&
1237 current_klass != resolved_klass &&
1238 // c) check the method is not private - we don't re-resolve private methods
1239 !resolved_method->is_private()
1240 ) {
1241 // Lookup super method
1242 Klass* super_klass = current_klass->super();
1243 sel_method = lookup_instance_method_in_klasses(super_klass,
1244 resolved_method->name(),
1245 resolved_method->signature(), CHECK);
1246 // check if found
1247 if (sel_method.is_null()) {
1248 ResourceMark rm(THREAD);
1249 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1250 Method::name_and_sig_as_C_string(resolved_klass,
1251 resolved_method->name(),
1252 resolved_method->signature()));
1253 }
1254 }
1255
1256 // Check that the class of objectref (the receiver) is the current class or interface,
1257 // or a subtype of the current class or interface (the sender), or else they are
1258 // nestmates, otherwise invokespecial throws IllegalAccessError.
1259 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1260 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1261 // a class. If the sender is an interface, the check has to be performed at runtime.
1262 InstanceKlass* cur_ik = InstanceKlass::cast(current_klass);
1263 InstanceKlass* sender = cur_ik->is_anonymous() ? cur_ik->host_klass() : cur_ik;
1264 if (sender->is_interface() && recv.not_null()) {
1265 Klass* receiver_klass = recv->klass();
1266 if (!receiver_klass->is_subtype_of(sender) &&
1267 (cur_ik == sender && // don't check nestmate access for anonymous classes
1268 // Note: we check the resolved class here, not the receiver class - the latter
1269 // may be a subtype of the resolved class defined outside the nest.
1270 !sender->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD))) {
1271 ResourceMark rm(THREAD);
1272 char buf[500];
1273 jio_snprintf(buf, sizeof(buf),
1274 "Receiver class %s must be the current class or a subtype of interface %s",
1275 receiver_klass->name()->as_C_string(),
1276 sender->name()->as_C_string());
1277 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1278 }
1279 }
1280 }
1281
1282 // check if not static
1283 if (sel_method->is_static()) {
1284 ResourceMark rm(THREAD);
1285 char buf[200];
1286 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1287 resolved_method->name(),
1288 resolved_method->signature()));
1289 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1290 }
1291
1292 // check if abstract
1293 if (sel_method->is_abstract()) {
1294 ResourceMark rm(THREAD);
1295 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1296 Method::name_and_sig_as_C_string(resolved_klass,
1297 sel_method->name(),
1298 sel_method->signature()));
1299 }
1300
1301 if (log_develop_is_enabled(Trace, itables)) {
1302 trace_method_resolution("invokespecial selected method: resolved-class:",
1303 resolved_klass, resolved_klass, sel_method, true);
1304 }
1305
1306 // setup result
1307 result.set_static(resolved_klass, sel_method, CHECK);
1308 }
1309
1310 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1311 const LinkInfo& link_info,
1312 bool check_null_and_abstract, TRAPS) {
1313 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1314 runtime_resolve_virtual_method(result, resolved_method,
1315 link_info.resolved_klass(),
1316 recv, receiver_klass,
1317 check_null_and_abstract, CHECK);
1318 }
1319
1320 // throws linktime exceptions
1321 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1322 TRAPS) {
1323 // normal method resolution
1324 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1325
1326 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1327 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1328
1329 // check if private interface method
1330 Klass* resolved_klass = link_info.resolved_klass();
1331 Klass* current_klass = link_info.current_klass();
1332
1333 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1334 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1335 ResourceMark rm(THREAD);
1336 char buf[200];
1337 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1338 Method::name_and_sig_as_C_string(resolved_klass,
1339 resolved_method->name(),
1340 resolved_method->signature()),
1341 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1342 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1343 }
1344
1345 // check if not static
1346 if (resolved_method->is_static()) {
1347 ResourceMark rm(THREAD);
1348 char buf[200];
1349 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1350 resolved_method->name(),
1351 resolved_method->signature()));
1352 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1353 }
1354
1355 if (log_develop_is_enabled(Trace, vtables)) {
1356 trace_method_resolution("invokevirtual resolved method: caller-class:",
1357 current_klass, resolved_klass, resolved_method, false);
1358 }
1359
1360 return resolved_method;
1361 }
1362
1363 // throws runtime exceptions
1364 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1365 const methodHandle& resolved_method,
1366 Klass* resolved_klass,
1367 Handle recv,
1368 Klass* recv_klass,
1369 bool check_null_and_abstract,
1370 TRAPS) {
1371
1372 // setup default return values
1373 int vtable_index = Method::invalid_vtable_index;
1374 methodHandle selected_method;
1375
1376 // runtime method resolution
1377 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1378 THROW(vmSymbols::java_lang_NullPointerException());
1379 }
1380
1381 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1382 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1383 // a missing receiver might result in a bogus lookup.
1384 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1385
1386 // do lookup based on receiver klass using the vtable index
1387 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1388 vtable_index = vtable_index_of_interface_method(resolved_klass,
1389 resolved_method);
1390 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1391
1392 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1393 } else {
1394 // at this point we are sure that resolved_method is virtual and not
1395 // a default or miranda method; therefore, it must have a valid vtable index.
1396 assert(!resolved_method->has_itable_index(), "");
1397 vtable_index = resolved_method->vtable_index();
1398 // We could get a negative vtable_index for final methods,
1399 // because as an optimization they are they are never put in the vtable,
1400 // unless they override an existing method.
1401 // If we do get a negative, it means the resolved method is the the selected
1402 // method, and it can never be changed by an override.
1403 if (vtable_index == Method::nonvirtual_vtable_index) {
1404 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1405 selected_method = resolved_method;
1406 } else {
1407 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1408 }
1409 }
1410
1411 // check if method exists
1412 if (selected_method.is_null()) {
1413 ResourceMark rm(THREAD);
1414 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1415 Method::name_and_sig_as_C_string(resolved_klass,
1416 resolved_method->name(),
1417 resolved_method->signature()));
1418 }
1419
1420 // check if abstract
1421 if (check_null_and_abstract && selected_method->is_abstract()) {
1422 ResourceMark rm(THREAD);
1423 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1424 Method::name_and_sig_as_C_string(resolved_klass,
1425 selected_method->name(),
1426 selected_method->signature()));
1427 }
1428
1429 if (log_develop_is_enabled(Trace, vtables)) {
1430 trace_method_resolution("invokevirtual selected method: receiver-class:",
1431 recv_klass, resolved_klass, selected_method,
1432 false, vtable_index);
1433 }
1434 // setup result
1435 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1436 }
1437
1438 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1439 const LinkInfo& link_info,
1440 bool check_null_and_abstract, TRAPS) {
1441 // throws linktime exceptions
1442 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1443 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1444 recv, recv_klass, check_null_and_abstract, CHECK);
1445 }
1446
1447 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1448 TRAPS) {
1449 // normal interface method resolution
1450 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1451 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1452 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1453
1454 return resolved_method;
1455 }
1456
1457 // throws runtime exceptions
1458 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1459 const methodHandle& resolved_method,
1460 Klass* resolved_klass,
1461 Handle recv,
1462 Klass* recv_klass,
1463 bool check_null_and_abstract, TRAPS) {
1464 // check if receiver exists
1465 if (check_null_and_abstract && recv.is_null()) {
1466 THROW(vmSymbols::java_lang_NullPointerException());
1467 }
1468
1469 // check if receiver klass implements the resolved interface
1470 if (!recv_klass->is_subtype_of(resolved_klass)) {
1471 ResourceMark rm(THREAD);
1472 char buf[200];
1473 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1474 recv_klass->external_name(),
1475 resolved_klass->external_name());
1476 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1477 }
1478
1479 methodHandle sel_method = resolved_method;
1480
1481 // resolve the method in the receiver class, unless it is private
1482 if (!resolved_method()->is_private()) {
1483 // do lookup based on receiver klass
1484 // This search must match the linktime preparation search for itable initialization
1485 // to correctly enforce loader constraints for interface method inheritance
1486 sel_method = lookup_instance_method_in_klasses(recv_klass,
1487 resolved_method->name(),
1488 resolved_method->signature(), CHECK);
1489
1490 if (sel_method.is_null() && !check_null_and_abstract) {
1491 // In theory this is a harmless placeholder value, but
1492 // in practice leaving in null affects the nsk default method tests.
1493 // This needs further study.
1494 sel_method = resolved_method;
1495 }
1496 // check if method exists
1497 if (sel_method.is_null()) {
1498 ResourceMark rm(THREAD);
1499 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1500 Method::name_and_sig_as_C_string(recv_klass,
1501 resolved_method->name(),
1502 resolved_method->signature()));
1503 }
1504 // check access
1505 // Throw Illegal Access Error if sel_method is not public.
1506 if (!sel_method->is_public()) {
1507 ResourceMark rm(THREAD);
1508 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1509 Method::name_and_sig_as_C_string(recv_klass,
1510 sel_method->name(),
1511 sel_method->signature()));
1512 }
1513 // check if abstract
1514 if (check_null_and_abstract && sel_method->is_abstract()) {
1515 ResourceMark rm(THREAD);
1516 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1517 Method::name_and_sig_as_C_string(recv_klass,
1518 sel_method->name(),
1519 sel_method->signature()));
1520 }
1521 }
1522
1523 if (log_develop_is_enabled(Trace, itables)) {
1524 trace_method_resolution("invokeinterface selected method: receiver-class:",
1525 recv_klass, resolved_klass, sel_method, true);
1526 }
1527 // setup result
1528 if (!resolved_method->has_itable_index()) {
1529 int vtable_index = resolved_method->vtable_index();
1530 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1531 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1532 } else {
1533 int itable_index = resolved_method()->itable_index();
1534 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1535 }
1536 }
1537
1538
1539 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1540 const LinkInfo& link_info) {
1541 EXCEPTION_MARK;
1542 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1543 if (HAS_PENDING_EXCEPTION) {
1544 CLEAR_PENDING_EXCEPTION;
1545 return methodHandle();
1546 } else {
1547 return method_result;
1548 }
1549 }
1550
1551 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1552 const LinkInfo& link_info) {
1553 EXCEPTION_MARK;
1554 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1555 if (HAS_PENDING_EXCEPTION) {
1556 CLEAR_PENDING_EXCEPTION;
1557 return methodHandle();
1558 } else {
1559 return method_result;
1560 }
1561 }
1562
1563 methodHandle LinkResolver::resolve_virtual_call_or_null(
1564 Klass* receiver_klass,
1565 const LinkInfo& link_info) {
1566 EXCEPTION_MARK;
1567 CallInfo info;
1568 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1569 if (HAS_PENDING_EXCEPTION) {
1570 CLEAR_PENDING_EXCEPTION;
1571 return methodHandle();
1572 }
1573 return info.selected_method();
1574 }
1575
1576 methodHandle LinkResolver::resolve_interface_call_or_null(
1577 Klass* receiver_klass,
1578 const LinkInfo& link_info) {
1579 EXCEPTION_MARK;
1580 CallInfo info;
1581 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1582 if (HAS_PENDING_EXCEPTION) {
1583 CLEAR_PENDING_EXCEPTION;
1584 return methodHandle();
1585 }
1586 return info.selected_method();
1587 }
1588
1589 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1590 const LinkInfo& link_info) {
1591 EXCEPTION_MARK;
1592 CallInfo info;
1593 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1594 /*check_null_or_abstract*/false, THREAD);
1595 if (HAS_PENDING_EXCEPTION) {
1596 CLEAR_PENDING_EXCEPTION;
1597 return Method::invalid_vtable_index;
1598 }
1599 return info.vtable_index();
1600 }
1601
1602 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1603 EXCEPTION_MARK;
1604 CallInfo info;
1605 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1606 if (HAS_PENDING_EXCEPTION) {
1607 CLEAR_PENDING_EXCEPTION;
1608 return methodHandle();
1609 }
1610 return info.selected_method();
1611 }
1612
1613 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1614 EXCEPTION_MARK;
1615 CallInfo info;
1616 resolve_special_call(info, Handle(), link_info, THREAD);
1617 if (HAS_PENDING_EXCEPTION) {
1618 CLEAR_PENDING_EXCEPTION;
1619 return methodHandle();
1620 }
1621 return info.selected_method();
1622 }
1623
1624
1625
1626 //------------------------------------------------------------------------------------------------------------------------
1627 // ConstantPool entries
1628
1629 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1630 switch (byte) {
1631 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1632 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1633 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1634 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1635 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1636 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1637 default : break;
1638 }
1639 return;
1640 }
1641
1642 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1643 const methodHandle& attached_method,
1644 Bytecodes::Code byte, TRAPS) {
1645 Klass* defc = attached_method->method_holder();
1646 Symbol* name = attached_method->name();
1647 Symbol* type = attached_method->signature();
1648 LinkInfo link_info(defc, name, type);
1649 switch(byte) {
1650 case Bytecodes::_invokevirtual:
1651 resolve_virtual_call(result, recv, recv->klass(), link_info,
1652 /*check_null_and_abstract=*/true, CHECK);
1653 break;
1654 case Bytecodes::_invokeinterface:
1655 resolve_interface_call(result, recv, recv->klass(), link_info,
1656 /*check_null_and_abstract=*/true, CHECK);
1657 break;
1658 case Bytecodes::_invokestatic:
1659 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1660 break;
1661 case Bytecodes::_invokespecial:
1662 resolve_special_call(result, recv, link_info, CHECK);
1663 break;
1664 default:
1665 fatal("bad call: %s", Bytecodes::name(byte));
1666 break;
1667 }
1668 }
1669
1670 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1671 LinkInfo link_info(pool, index, CHECK);
1672 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1673 }
1674
1675
1676 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1677 const constantPoolHandle& pool, int index, TRAPS) {
1678 LinkInfo link_info(pool, index, CHECK);
1679 resolve_special_call(result, recv, link_info, CHECK);
1680 }
1681
1682
1683 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1684 const constantPoolHandle& pool, int index,
1685 TRAPS) {
1686
1687 LinkInfo link_info(pool, index, CHECK);
1688 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1689 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1690 }
1691
1692
1693 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1694 LinkInfo link_info(pool, index, CHECK);
1695 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1696 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1697 }
1698
1699
1700 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1701 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1702 LinkInfo link_info(pool, index, CHECK);
1703 if (TraceMethodHandles) {
1704 ResourceMark rm(THREAD);
1705 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1706 link_info.signature()->as_C_string());
1707 }
1708 resolve_handle_call(result, link_info, CHECK);
1709 }
1710
1711 void LinkResolver::resolve_handle_call(CallInfo& result,
1712 const LinkInfo& link_info,
1713 TRAPS) {
1714 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1715 Klass* resolved_klass = link_info.resolved_klass();
1716 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1717 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1718 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1719 Handle resolved_appendix;
1720 Handle resolved_method_type;
1721 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1722 &resolved_appendix, &resolved_method_type, CHECK);
1723 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1724 }
1725
1726 static void wrap_invokedynamic_exception(TRAPS) {
1727 if (HAS_PENDING_EXCEPTION) {
1728 // See the "Linking Exceptions" section for the invokedynamic instruction
1729 // in JVMS 6.5.
1730 if (PENDING_EXCEPTION->is_a(SystemDictionary::Error_klass())) {
1731 // Pass through an Error, including BootstrapMethodError, any other form
1732 // of linkage error, or say ThreadDeath/OutOfMemoryError
1733 if (TraceMethodHandles) {
1734 tty->print_cr("invokedynamic passes through an Error for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1735 PENDING_EXCEPTION->print();
1736 }
1737 return;
1738 }
1739
1740 // Otherwise wrap the exception in a BootstrapMethodError
1741 if (TraceMethodHandles) {
1742 tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1743 PENDING_EXCEPTION->print();
1744 }
1745 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1746 CLEAR_PENDING_EXCEPTION;
1747 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1748 }
1749 }
1750
1751 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1752 Symbol* method_name = pool->name_ref_at(index);
1753 Symbol* method_signature = pool->signature_ref_at(index);
1754 Klass* current_klass = pool->pool_holder();
1755
1756 // Resolve the bootstrap specifier (BSM + optional arguments).
1757 Handle bootstrap_specifier;
1758 // Check if CallSite has been bound already:
1759 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1760 if (cpce->is_f1_null()) {
1761 int pool_index = cpce->constant_pool_index();
1762 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1763 wrap_invokedynamic_exception(CHECK);
1764 assert(bsm_info != NULL, "");
1765 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1766 bootstrap_specifier = Handle(THREAD, bsm_info);
1767 }
1768 if (!cpce->is_f1_null()) {
1769 methodHandle method( THREAD, cpce->f1_as_method());
1770 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1771 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1772 result.set_handle(method, appendix, method_type, THREAD);
1773 wrap_invokedynamic_exception(CHECK);
1774 return;
1775 }
1776
1777 if (TraceMethodHandles) {
1778 ResourceMark rm(THREAD);
1779 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1780 ConstantPool::decode_invokedynamic_index(index),
1781 method_name->as_C_string(), method_signature->as_C_string(),
1782 current_klass->name()->as_C_string());
1783 tty->print(" BSM info: "); bootstrap_specifier->print();
1784 }
1785
1786 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1787 }
1788
1789 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1790 Handle bootstrap_specifier,
1791 Symbol* method_name, Symbol* method_signature,
1792 Klass* current_klass,
1793 TRAPS) {
1794 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1795 // The appendix argument is likely to be a freshly-created CallSite.
1796 Handle resolved_appendix;
1797 Handle resolved_method_type;
1798 methodHandle resolved_method =
1799 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1800 bootstrap_specifier,
1801 method_name, method_signature,
1802 &resolved_appendix,
1803 &resolved_method_type,
1804 THREAD);
1805 wrap_invokedynamic_exception(CHECK);
1806 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1807 wrap_invokedynamic_exception(CHECK);
1808 }