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 // Propagate any existing exceptions that may have been thrown
576 if (HAS_PENDING_EXCEPTION) {
577 return;
578 }
579 ResourceMark rm(THREAD);
580 Exceptions::fthrow(
581 THREAD_AND_LOCATION,
582 vmSymbols::java_lang_IllegalAccessError(),
583 "tried to access method %s.%s%s from class %s",
584 sel_klass->external_name(),
585 sel_method->name()->as_C_string(),
586 sel_method->signature()->as_C_string(),
587 ref_klass->external_name()
588 );
589 return;
590 }
591 }
592
593 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
594 const constantPoolHandle& pool, int index, TRAPS) {
595 // This method is used only
596 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
597 // and
598 // (2) in Bytecode_invoke::static_target
599 // It appears to fail when applied to an invokeinterface call site.
600 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
601 // resolve klass
602 if (code == Bytecodes::_invokedynamic) {
603 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
604 Symbol* method_name = vmSymbols::invoke_name();
605 Symbol* method_signature = pool->signature_ref_at(index);
606 Klass* current_klass = pool->pool_holder();
607 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
608 return resolve_method(link_info, code, THREAD);
609 }
610
611 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
612 Klass* resolved_klass = link_info.resolved_klass();
613
614 if (pool->has_preresolution()
615 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
616 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
617 Method* result = ConstantPool::method_at_if_loaded(pool, index);
618 if (result != NULL) {
619 return methodHandle(THREAD, result);
620 }
621 }
622
623 if (code == Bytecodes::_invokeinterface) {
624 return resolve_interface_method(link_info, code, THREAD);
625 } else if (code == Bytecodes::_invokevirtual) {
626 return resolve_method(link_info, code, THREAD);
627 } else if (!resolved_klass->is_interface()) {
628 return resolve_method(link_info, code, THREAD);
629 } else {
630 return resolve_interface_method(link_info, code, THREAD);
631 }
632 }
633
634 // Check and print a loader constraint violation message for method or interface method
635 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
636 const methodHandle& resolved_method,
637 const char* method_type, TRAPS) {
638 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
639 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
640
641 ResourceMark rm(THREAD);
642 Symbol* failed_type_symbol =
643 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
644 resolved_loader, true, CHECK);
645 if (failed_type_symbol != NULL) {
646 const char* msg = "loader constraint violation: when resolving %s"
647 " \"%s\" the class loader (instance of %s) of the current class, %s,"
648 " and the class loader (instance of %s) for the method's defining class, %s, have"
649 " different Class objects for the type %s used in the signature";
650 char* sig = link_info.method_string();
651 const char* loader1_name = SystemDictionary::loader_name(current_loader());
652 char* current = link_info.current_klass()->name()->as_C_string();
653 const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
654 char* target = resolved_method->method_holder()->name()->as_C_string();
655 char* failed_type_name = failed_type_symbol->as_C_string();
656 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
657 strlen(current) + strlen(loader2_name) + strlen(target) +
658 strlen(failed_type_name) + strlen(method_type) + 1;
659 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
660 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
661 target, failed_type_name);
662 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
663 }
664 }
665
666 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
667 Klass* current_klass,
668 Klass* sel_klass, TRAPS) {
669 Handle ref_loader(THREAD, current_klass->class_loader());
670 Handle sel_loader(THREAD, sel_klass->class_loader());
671
672 ResourceMark rm(THREAD); // needed for check_signature_loaders
673 Symbol* failed_type_symbol =
674 SystemDictionary::check_signature_loaders(sig,
675 ref_loader, sel_loader,
676 false,
677 CHECK);
678 if (failed_type_symbol != NULL) {
679 const char* msg = "loader constraint violation: when resolving field"
680 " \"%s\" the class loader (instance of %s) of the referring class, "
681 "%s, and the class loader (instance of %s) for the field's resolved "
682 "type, %s, have different Class objects for that type";
683 char* field_name = field->as_C_string();
684 const char* loader1_name = SystemDictionary::loader_name(ref_loader());
685 char* sel = sel_klass->name()->as_C_string();
686 const char* loader2_name = SystemDictionary::loader_name(sel_loader());
687 char* failed_type_name = failed_type_symbol->as_C_string();
688 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
689 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
690 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
691 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
692 failed_type_name);
693 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
694 }
695 }
696
697 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
698 Bytecodes::Code code, TRAPS) {
699
700 Handle nested_exception;
701 Klass* resolved_klass = link_info.resolved_klass();
702
703 // 1. For invokevirtual, cannot call an interface method
704 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
705 ResourceMark rm(THREAD);
706 char buf[200];
707 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
708 resolved_klass->external_name());
709 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
710 }
711
712 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
713 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
714 ResourceMark rm(THREAD);
715 char buf[200];
716 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
717 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
718 }
719
720 // 3. lookup method in resolved klass and its super klasses
721 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
722
723 // 4. lookup method in all the interfaces implemented by the resolved klass
724 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
725 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
726
727 if (resolved_method.is_null()) {
728 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
729 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
730 if (HAS_PENDING_EXCEPTION) {
731 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
732 CLEAR_PENDING_EXCEPTION;
733 }
734 }
735 }
736
737 // 5. method lookup failed
738 if (resolved_method.is_null()) {
739 ResourceMark rm(THREAD);
740 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
741 Method::name_and_sig_as_C_string(resolved_klass,
742 link_info.name(),
743 link_info.signature()),
744 nested_exception, NULL);
745 }
746
747 // 6. access checks, access checking may be turned off when calling from within the VM.
748 Klass* current_klass = link_info.current_klass();
749 if (link_info.check_access()) {
750 assert(current_klass != NULL , "current_klass should not be null");
751
752 // check if method can be accessed by the referring class
753 check_method_accessability(current_klass,
754 resolved_klass,
755 resolved_method->method_holder(),
756 resolved_method,
757 CHECK_NULL);
758
759 // check loader constraints
760 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
761 }
762
763 // For private method invocation we should only find the method in the resolved class.
764 // If that is not the case then we have a found a supertype method that we have nestmate
765 // access to.
766 // FIXME: the "ignoring xxx" part is for debugging only
767 if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) {
768 ResourceMark rm(THREAD);
769 DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);)
770 assert(is_nestmate, "was only expecting nestmates to get here!");
771 Exceptions::fthrow(
772 THREAD_AND_LOCATION,
773 vmSymbols::java_lang_NoSuchMethodError(),
774 "%s: method %s%s not found (ignoring %s)",
775 resolved_klass->external_name(),
776 resolved_method->name()->as_C_string(),
777 resolved_method->signature()->as_C_string(),
778 resolved_method->method_holder()->external_name()
779 );
780 return NULL;
781 }
782
783 return resolved_method;
784 }
785
786 static void trace_method_resolution(const char* prefix,
787 Klass* klass,
788 Klass* resolved_klass,
789 const methodHandle& method,
790 bool logitables,
791 int index = -1) {
792 #ifndef PRODUCT
793 ResourceMark rm;
794 Log(itables) logi;
795 LogStream lsi(logi.trace());
796 Log(vtables) logv;
797 LogStream lsv(logv.trace());
798 outputStream* st;
799 if (logitables) {
800 st = &lsi;
801 } else {
802 st = &lsv;
803 }
804 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
805 prefix,
806 (klass == NULL ? "<NULL>" : klass->internal_name()),
807 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
808 Method::name_and_sig_as_C_string(resolved_klass,
809 method->name(),
810 method->signature()),
811 method->method_holder()->internal_name());
812 method->print_linkage_flags(st);
813 if (index != -1) {
814 st->print("vtable_index:%d", index);
815 }
816 st->cr();
817 #endif // PRODUCT
818 }
819
820 // FIXME: update to correct version
821 #define VIRTUAL_PRIVATE_ACCESS_VERSION 53
822
823 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
824 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
825
826 Klass* resolved_klass = link_info.resolved_klass();
827
828 // check if klass is interface
829 if (!resolved_klass->is_interface()) {
830 ResourceMark rm(THREAD);
831 char buf[200];
832 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
833 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
834 }
835
836 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
837 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
838 ResourceMark rm(THREAD);
839 char buf[200];
840 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
841 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
842 }
843
844 // lookup method in this interface or its super, java.lang.Object
845 // JDK8: also look for static methods
846 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
847
848 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
849 // lookup method in all the super-interfaces
850 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
851 }
852
853 if (resolved_method.is_null()) {
854 // no method found
855 ResourceMark rm(THREAD);
856 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
857 Method::name_and_sig_as_C_string(resolved_klass,
858 link_info.name(),
859 link_info.signature()));
860 }
861
862 if (link_info.check_access()) {
863 // JDK8 adds non-public interface methods, and accessability check requirement
864 Klass* current_klass = link_info.current_klass();
865
866 assert(current_klass != NULL , "current_klass should not be null");
867
868 // check if method can be accessed by the referring class
869 check_method_accessability(current_klass,
870 resolved_klass,
871 resolved_method->method_holder(),
872 resolved_method,
873 CHECK_NULL);
874
875 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
876 }
877
878 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
879 ResourceMark rm(THREAD);
880 char buf[200];
881 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
882 Method::name_and_sig_as_C_string(resolved_klass,
883 resolved_method->name(), resolved_method->signature()));
884 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
885 }
886
887 if (code == Bytecodes::_invokeinterface && resolved_method->is_private()) {
888 Klass* current_klass = link_info.current_klass();
889 assert(current_klass != NULL, "current_klass should not be null for invokeinterface");
890 if (InstanceKlass::cast(current_klass)->major_version() < VIRTUAL_PRIVATE_ACCESS_VERSION) {
891 ResourceMark rm(THREAD);
892 char buf[200];
893 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s, caller-class:%s",
894 Method::name_and_sig_as_C_string(resolved_klass,
895 resolved_method->name(),
896 resolved_method->signature()),
897 current_klass->internal_name());
898 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
899 }
900 }
901
902 if (log_develop_is_enabled(Trace, itables)) {
903 char buf[200];
904 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
905 Bytecodes::name(code));
906 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
907 resolved_method, true);
908 }
909
910 return resolved_method;
911 }
912
913 //------------------------------------------------------------------------------------------------------------------------
914 // Field resolution
915
916 void LinkResolver::check_field_accessability(Klass* ref_klass,
917 Klass* resolved_klass,
918 Klass* sel_klass,
919 const fieldDescriptor& fd,
920 TRAPS) {
921 if (!Reflection::verify_field_access(ref_klass,
922 resolved_klass,
923 sel_klass,
924 fd.access_flags(),
925 true)) {
926 // Propagate any existing exceptions that may have been thrown
927 if (HAS_PENDING_EXCEPTION) {
928 return;
929 }
930
931 ResourceMark rm(THREAD);
932 Exceptions::fthrow(
933 THREAD_AND_LOCATION,
934 vmSymbols::java_lang_IllegalAccessError(),
935 "tried to access field %s.%s from class %s",
936 sel_klass->external_name(),
937 fd.name()->as_C_string(),
938 ref_klass->external_name()
939 );
940 return;
941 }
942 }
943
944 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
945 LinkInfo link_info(pool, index, method, CHECK);
946 resolve_field(fd, link_info, byte, true, CHECK);
947 }
948
949 void LinkResolver::resolve_field(fieldDescriptor& fd,
950 const LinkInfo& link_info,
951 Bytecodes::Code byte, bool initialize_class,
952 TRAPS) {
953 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
954 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
955 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
956 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
957
958 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
959 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
960 // Check if there's a resolved klass containing the field
961 Klass* resolved_klass = link_info.resolved_klass();
962 Symbol* field = link_info.name();
963 Symbol* sig = link_info.signature();
964
965 if (resolved_klass == NULL) {
966 ResourceMark rm(THREAD);
967 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
968 }
969
970 // Resolve instance field
971 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
972 // check if field exists; i.e., if a klass containing the field def has been selected
973 if (sel_klass == NULL) {
974 ResourceMark rm(THREAD);
975 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
976 }
977
978 if (!link_info.check_access())
979 // Access checking may be turned off when calling from within the VM.
980 return;
981
982 // check access
983 Klass* current_klass = link_info.current_klass();
984 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
985
986 // check for errors
987 if (is_static != fd.is_static()) {
988 ResourceMark rm(THREAD);
989 char msg[200];
990 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
991 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
992 }
993
994 // A final field can be modified only
995 // (1) by methods declared in the class declaring the field and
996 // (2) by the <clinit> method (in case of a static field)
997 // or by the <init> method (in case of an instance field).
998 if (is_put && fd.access_flags().is_final()) {
999 ResourceMark rm(THREAD);
1000 stringStream ss;
1001
1002 if (sel_klass != current_klass) {
1003 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1004 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1005 current_klass->external_name());
1006 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1007 }
1008
1009 if (fd.constants()->pool_holder()->major_version() >= 53) {
1010 methodHandle m = link_info.current_method();
1011 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
1012 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1013 fd.is_static() &&
1014 !m()->is_static_initializer());
1015 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1016 !fd.is_static() &&
1017 !m->is_object_initializer());
1018
1019 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1020 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1021 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1022 m()->name()->as_C_string(),
1023 is_static ? "<clinit>" : "<init>");
1024 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1025 }
1026 }
1027 }
1028
1029 // initialize resolved_klass if necessary
1030 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1031 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1032 //
1033 // note 2: we don't want to force initialization if we are just checking
1034 // if the field access is legal; e.g., during compilation
1035 if (is_static && initialize_class) {
1036 sel_klass->initialize(CHECK);
1037 }
1038
1039 if (sel_klass != current_klass) {
1040 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1041 }
1042
1043 // return information. note that the klass is set to the actual klass containing the
1044 // field, otherwise access of static fields in superclasses will not work.
1045 }
1046
1047
1048 //------------------------------------------------------------------------------------------------------------------------
1049 // Invoke resolution
1050 //
1051 // Naming conventions:
1052 //
1053 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1054 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1055 // resolved_klass the specified klass (i.e., specified via constant pool index)
1056 // recv_klass the receiver klass
1057
1058
1059 void LinkResolver::resolve_static_call(CallInfo& result,
1060 const LinkInfo& link_info,
1061 bool initialize_class, TRAPS) {
1062 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1063
1064 // The resolved class can change as a result of this resolution.
1065 Klass* resolved_klass = resolved_method->method_holder();
1066
1067 // Initialize klass (this should only happen if everything is ok)
1068 if (initialize_class && resolved_klass->should_be_initialized()) {
1069 resolved_klass->initialize(CHECK);
1070 // Use updated LinkInfo to reresolve with resolved method holder
1071 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1072 link_info.current_klass(),
1073 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1074 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1075 }
1076
1077 // setup result
1078 result.set_static(resolved_klass, resolved_method, CHECK);
1079 }
1080
1081 // throws linktime exceptions
1082 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1083
1084 Klass* resolved_klass = link_info.resolved_klass();
1085 methodHandle resolved_method;
1086 if (!resolved_klass->is_interface()) {
1087 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1088 } else {
1089 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1090 }
1091 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1092
1093 // check if static
1094 if (!resolved_method->is_static()) {
1095 ResourceMark rm(THREAD);
1096 char buf[200];
1097 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1098 resolved_method->name(),
1099 resolved_method->signature()));
1100 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1101 }
1102 return resolved_method;
1103 }
1104
1105
1106 void LinkResolver::resolve_special_call(CallInfo& result,
1107 Handle recv,
1108 const LinkInfo& link_info,
1109 TRAPS) {
1110 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1111 runtime_resolve_special_method(result, resolved_method,
1112 link_info.resolved_klass(),
1113 link_info.current_klass(),
1114 recv,
1115 link_info.check_access(), CHECK);
1116 }
1117
1118 // throws linktime exceptions
1119 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1120 TRAPS) {
1121
1122 // Invokespecial is called for multiple special reasons:
1123 // <init>
1124 // local private method invocation, for classes and interfaces
1125 // superclass.method, which can also resolve to a default method
1126 // and the selected method is recalculated relative to the direct superclass
1127 // superinterface.method, which explicitly does not check shadowing
1128 Klass* resolved_klass = link_info.resolved_klass();
1129 methodHandle resolved_method;
1130
1131 if (!resolved_klass->is_interface()) {
1132 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1133 } else {
1134 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1135 }
1136
1137 // check if method name is <init>, that it is found in same klass as static type
1138 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1139 resolved_method->method_holder() != resolved_klass) {
1140 ResourceMark rm(THREAD);
1141 Exceptions::fthrow(
1142 THREAD_AND_LOCATION,
1143 vmSymbols::java_lang_NoSuchMethodError(),
1144 "%s: method %s%s not found",
1145 resolved_klass->external_name(),
1146 resolved_method->name()->as_C_string(),
1147 resolved_method->signature()->as_C_string()
1148 );
1149 return NULL;
1150 }
1151
1152 // check that invokespecial's interface method reference is in a direct superinterface,
1153 // unless we are dealing with nestmates.
1154 Klass* current_klass = link_info.current_klass();
1155 if (current_klass != NULL && resolved_klass->is_interface()) {
1156 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1157 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1158 ck :
1159 InstanceKlass::cast(ck->host_klass());
1160 // Disable verification for the dynamically-generated reflection bytecodes.
1161 bool is_reflect = klass_to_check->is_subclass_of(
1162 SystemDictionary::reflect_MagicAccessorImpl_klass());
1163
1164 if (!is_reflect &&
1165 !klass_to_check->is_same_or_direct_interface(resolved_klass) &&
1166 (ck == klass_to_check && // don't check nestmate access for anonymous classes
1167 !klass_to_check->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD))) {
1168 ResourceMark rm(THREAD);
1169 char buf[200];
1170 jio_snprintf(buf, sizeof(buf),
1171 "Interface method reference: %s, is not in a direct superinterface of %s",
1172 Method::name_and_sig_as_C_string(resolved_klass,
1173 resolved_method->name(),
1174 resolved_method->signature()),
1175 current_klass->external_name());
1176 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1177 }
1178 }
1179
1180 // check if not static
1181 if (resolved_method->is_static()) {
1182 ResourceMark rm(THREAD);
1183 char buf[200];
1184 jio_snprintf(buf, sizeof(buf),
1185 "Expecting non-static method %s",
1186 Method::name_and_sig_as_C_string(resolved_klass,
1187 resolved_method->name(),
1188 resolved_method->signature()));
1189 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1190 }
1191
1192 // For private method invocation we should only find the method in the resolved class.
1193 // If that is not the case then we have a found a supertype method that we have nestmate
1194 // access to.
1195 // FIXME: the "ignoring xxx" part is for debugging only
1196 if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) {
1197 ResourceMark rm(THREAD);
1198 DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);)
1199 assert(is_nestmate, "was only expecting nestmates here!");
1200 Exceptions::fthrow(
1201 THREAD_AND_LOCATION,
1202 vmSymbols::java_lang_NoSuchMethodError(),
1203 "%s: method %s%s not found (ignoring %s)",
1204 resolved_klass->external_name(),
1205 resolved_method->name()->as_C_string(),
1206 resolved_method->signature()->as_C_string(),
1207 resolved_method->method_holder()->external_name()
1208 );
1209 return NULL;
1210 }
1211
1212 if (log_develop_is_enabled(Trace, itables)) {
1213 trace_method_resolution("invokespecial resolved method: caller-class:",
1214 current_klass, resolved_klass, resolved_method, true);
1215 }
1216
1217 return resolved_method;
1218 }
1219
1220 // throws runtime exceptions
1221 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1222 const methodHandle& resolved_method,
1223 Klass* resolved_klass,
1224 Klass* current_klass,
1225 Handle recv,
1226 bool check_access, TRAPS) {
1227
1228 // resolved method is selected method unless we have an old-style lookup
1229 // for a superclass method
1230 // Invokespecial for a superinterface, resolved method is selected method,
1231 // no checks for shadowing
1232 methodHandle sel_method(THREAD, resolved_method());
1233
1234 if (check_access &&
1235 // check if the method is not <init>
1236 resolved_method->name() != vmSymbols::object_initializer_name()
1237 ) {
1238 // check if this is an old-style super call and do a new lookup if so
1239 // a) check if ACC_SUPER flag is set for the current class
1240 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1241 // b) check if the class of the resolved_klass is a superclass
1242 // (not supertype in order to exclude interface classes) of the current class.
1243 // This check is not performed for super.invoke for interface methods
1244 // in super interfaces.
1245 current_klass->is_subclass_of(resolved_klass) &&
1246 current_klass != resolved_klass &&
1247 // c) check the method is not private - we don't re-resolve private methods
1248 !resolved_method->is_private()
1249 ) {
1250 // Lookup super method
1251 Klass* super_klass = current_klass->super();
1252 sel_method = lookup_instance_method_in_klasses(super_klass,
1253 resolved_method->name(),
1254 resolved_method->signature(), CHECK);
1255 // check if found
1256 if (sel_method.is_null()) {
1257 ResourceMark rm(THREAD);
1258 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1259 Method::name_and_sig_as_C_string(resolved_klass,
1260 resolved_method->name(),
1261 resolved_method->signature()));
1262 }
1263 }
1264
1265 // Check that the class of objectref (the receiver) is the current class or interface,
1266 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1267 // throws IllegalAccessError.
1268 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1269 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1270 // a class. If the sender is an interface, the check has to be performed at runtime.
1271 InstanceKlass* cur_ik = InstanceKlass::cast(current_klass);
1272 InstanceKlass* sender = cur_ik->is_anonymous() ? cur_ik->host_klass() : cur_ik;
1273 if (sender->is_interface() && recv.not_null()) {
1274 Klass* receiver_klass = recv->klass();
1275 if (!receiver_klass->is_subtype_of(sender)) {
1276 ResourceMark rm(THREAD);
1277 char buf[500];
1278 jio_snprintf(buf, sizeof(buf),
1279 "Receiver class %s must be the current class or a subtype of interface %s",
1280 receiver_klass->name()->as_C_string(),
1281 sender->name()->as_C_string());
1282 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1283 }
1284 }
1285 }
1286
1287 // check if not static
1288 if (sel_method->is_static()) {
1289 ResourceMark rm(THREAD);
1290 char buf[200];
1291 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1292 resolved_method->name(),
1293 resolved_method->signature()));
1294 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1295 }
1296
1297 // check if abstract
1298 if (sel_method->is_abstract()) {
1299 ResourceMark rm(THREAD);
1300 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1301 Method::name_and_sig_as_C_string(resolved_klass,
1302 sel_method->name(),
1303 sel_method->signature()));
1304 }
1305
1306 if (log_develop_is_enabled(Trace, itables)) {
1307 trace_method_resolution("invokespecial selected method: resolved-class:",
1308 resolved_klass, resolved_klass, sel_method, true);
1309 }
1310
1311 // setup result
1312 result.set_static(resolved_klass, sel_method, CHECK);
1313 }
1314
1315 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1316 const LinkInfo& link_info,
1317 bool check_null_and_abstract, TRAPS) {
1318 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1319 runtime_resolve_virtual_method(result, resolved_method,
1320 link_info.resolved_klass(),
1321 recv, receiver_klass,
1322 check_null_and_abstract, CHECK);
1323 }
1324
1325 // throws linktime exceptions
1326 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1327 TRAPS) {
1328 // normal method resolution
1329 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1330
1331 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1332 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1333
1334 // check if private interface method
1335 Klass* resolved_klass = link_info.resolved_klass();
1336 Klass* current_klass = link_info.current_klass();
1337
1338 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1339 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1340 ResourceMark rm(THREAD);
1341 char buf[200];
1342 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1343 Method::name_and_sig_as_C_string(resolved_klass,
1344 resolved_method->name(),
1345 resolved_method->signature()),
1346 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1347 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1348 }
1349
1350 // check if not static
1351 if (resolved_method->is_static()) {
1352 ResourceMark rm(THREAD);
1353 char buf[200];
1354 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1355 resolved_method->name(),
1356 resolved_method->signature()));
1357 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1358 }
1359
1360 if (log_develop_is_enabled(Trace, vtables)) {
1361 trace_method_resolution("invokevirtual resolved method: caller-class:",
1362 current_klass, resolved_klass, resolved_method, false);
1363 }
1364
1365 return resolved_method;
1366 }
1367
1368 // throws runtime exceptions
1369 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1370 const methodHandle& resolved_method,
1371 Klass* resolved_klass,
1372 Handle recv,
1373 Klass* recv_klass,
1374 bool check_null_and_abstract,
1375 TRAPS) {
1376
1377 // setup default return values
1378 int vtable_index = Method::invalid_vtable_index;
1379 methodHandle selected_method;
1380
1381 // runtime method resolution
1382 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1383 THROW(vmSymbols::java_lang_NullPointerException());
1384 }
1385
1386 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1387 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1388 // a missing receiver might result in a bogus lookup.
1389 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1390
1391 // do lookup based on receiver klass using the vtable index
1392 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1393 vtable_index = vtable_index_of_interface_method(resolved_klass,
1394 resolved_method);
1395 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1396
1397 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1398 } else {
1399 // at this point we are sure that resolved_method is virtual and not
1400 // a default or miranda method; therefore, it must have a valid vtable index.
1401 assert(!resolved_method->has_itable_index(), "");
1402 vtable_index = resolved_method->vtable_index();
1403 // We could get a negative vtable_index for final methods,
1404 // because as an optimization they are they are never put in the vtable,
1405 // unless they override an existing method.
1406 // If we do get a negative, it means the resolved method is the the selected
1407 // method, and it can never be changed by an override.
1408 if (vtable_index == Method::nonvirtual_vtable_index) {
1409 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1410 selected_method = resolved_method;
1411 } else {
1412 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1413 }
1414 }
1415
1416 // check if method exists
1417 if (selected_method.is_null()) {
1418 ResourceMark rm(THREAD);
1419 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1420 Method::name_and_sig_as_C_string(resolved_klass,
1421 resolved_method->name(),
1422 resolved_method->signature()));
1423 }
1424
1425 // check if abstract
1426 if (check_null_and_abstract && selected_method->is_abstract()) {
1427 ResourceMark rm(THREAD);
1428 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1429 Method::name_and_sig_as_C_string(resolved_klass,
1430 selected_method->name(),
1431 selected_method->signature()));
1432 }
1433
1434 if (log_develop_is_enabled(Trace, vtables)) {
1435 trace_method_resolution("invokevirtual selected method: receiver-class:",
1436 recv_klass, resolved_klass, selected_method,
1437 false, vtable_index);
1438 }
1439 // setup result
1440 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1441 }
1442
1443 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1444 const LinkInfo& link_info,
1445 bool check_null_and_abstract, TRAPS) {
1446 // throws linktime exceptions
1447 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1448 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1449 recv, recv_klass, check_null_and_abstract, CHECK);
1450 }
1451
1452 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1453 TRAPS) {
1454 // normal interface method resolution
1455 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1456 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1457 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1458
1459 return resolved_method;
1460 }
1461
1462 // throws runtime exceptions
1463 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1464 const methodHandle& resolved_method,
1465 Klass* resolved_klass,
1466 Handle recv,
1467 Klass* recv_klass,
1468 bool check_null_and_abstract, TRAPS) {
1469 // check if receiver exists
1470 if (check_null_and_abstract && recv.is_null()) {
1471 THROW(vmSymbols::java_lang_NullPointerException());
1472 }
1473
1474 // check if receiver klass implements the resolved interface
1475 if (!recv_klass->is_subtype_of(resolved_klass)) {
1476 ResourceMark rm(THREAD);
1477 char buf[200];
1478 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1479 recv_klass->external_name(),
1480 resolved_klass->external_name());
1481 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1482 }
1483
1484 methodHandle sel_method = resolved_method;
1485
1486 // resolve the method in the receiver class, unless it is private
1487 if (!resolved_method()->is_private()) {
1488 // do lookup based on receiver klass
1489 // This search must match the linktime preparation search for itable initialization
1490 // to correctly enforce loader constraints for interface method inheritance
1491 sel_method = lookup_instance_method_in_klasses(recv_klass,
1492 resolved_method->name(),
1493 resolved_method->signature(), CHECK);
1494
1495 if (sel_method.is_null() && !check_null_and_abstract) {
1496 // In theory this is a harmless placeholder value, but
1497 // in practice leaving in null affects the nsk default method tests.
1498 // This needs further study.
1499 sel_method = resolved_method;
1500 }
1501 // check if method exists
1502 if (sel_method.is_null()) {
1503 ResourceMark rm(THREAD);
1504 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1505 Method::name_and_sig_as_C_string(recv_klass,
1506 resolved_method->name(),
1507 resolved_method->signature()));
1508 }
1509 // check access
1510 // Throw Illegal Access Error if sel_method is not public.
1511 if (!sel_method->is_public()) {
1512 ResourceMark rm(THREAD);
1513 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1514 Method::name_and_sig_as_C_string(recv_klass,
1515 sel_method->name(),
1516 sel_method->signature()));
1517 }
1518 // check if abstract
1519 if (check_null_and_abstract && sel_method->is_abstract()) {
1520 ResourceMark rm(THREAD);
1521 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1522 Method::name_and_sig_as_C_string(recv_klass,
1523 sel_method->name(),
1524 sel_method->signature()));
1525 }
1526 }
1527
1528 if (log_develop_is_enabled(Trace, itables)) {
1529 trace_method_resolution("invokeinterface selected method: receiver-class:",
1530 recv_klass, resolved_klass, sel_method, true);
1531 }
1532 // setup result
1533 if (!resolved_method->has_itable_index()) {
1534 int vtable_index = resolved_method->vtable_index();
1535 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1536 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1537 } else {
1538 int itable_index = resolved_method()->itable_index();
1539 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1540 }
1541 }
1542
1543
1544 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1545 const LinkInfo& link_info) {
1546 EXCEPTION_MARK;
1547 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1548 if (HAS_PENDING_EXCEPTION) {
1549 CLEAR_PENDING_EXCEPTION;
1550 return methodHandle();
1551 } else {
1552 return method_result;
1553 }
1554 }
1555
1556 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1557 const LinkInfo& link_info) {
1558 EXCEPTION_MARK;
1559 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1560 if (HAS_PENDING_EXCEPTION) {
1561 CLEAR_PENDING_EXCEPTION;
1562 return methodHandle();
1563 } else {
1564 return method_result;
1565 }
1566 }
1567
1568 methodHandle LinkResolver::resolve_virtual_call_or_null(
1569 Klass* receiver_klass,
1570 const LinkInfo& link_info) {
1571 EXCEPTION_MARK;
1572 CallInfo info;
1573 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1574 if (HAS_PENDING_EXCEPTION) {
1575 CLEAR_PENDING_EXCEPTION;
1576 return methodHandle();
1577 }
1578 return info.selected_method();
1579 }
1580
1581 methodHandle LinkResolver::resolve_interface_call_or_null(
1582 Klass* receiver_klass,
1583 const LinkInfo& link_info) {
1584 EXCEPTION_MARK;
1585 CallInfo info;
1586 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1587 if (HAS_PENDING_EXCEPTION) {
1588 CLEAR_PENDING_EXCEPTION;
1589 return methodHandle();
1590 }
1591 return info.selected_method();
1592 }
1593
1594 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1595 const LinkInfo& link_info) {
1596 EXCEPTION_MARK;
1597 CallInfo info;
1598 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1599 /*check_null_or_abstract*/false, THREAD);
1600 if (HAS_PENDING_EXCEPTION) {
1601 CLEAR_PENDING_EXCEPTION;
1602 return Method::invalid_vtable_index;
1603 }
1604 return info.vtable_index();
1605 }
1606
1607 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1608 EXCEPTION_MARK;
1609 CallInfo info;
1610 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1611 if (HAS_PENDING_EXCEPTION) {
1612 CLEAR_PENDING_EXCEPTION;
1613 return methodHandle();
1614 }
1615 return info.selected_method();
1616 }
1617
1618 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1619 EXCEPTION_MARK;
1620 CallInfo info;
1621 resolve_special_call(info, Handle(), link_info, THREAD);
1622 if (HAS_PENDING_EXCEPTION) {
1623 CLEAR_PENDING_EXCEPTION;
1624 return methodHandle();
1625 }
1626 return info.selected_method();
1627 }
1628
1629
1630
1631 //------------------------------------------------------------------------------------------------------------------------
1632 // ConstantPool entries
1633
1634 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1635 switch (byte) {
1636 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1637 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1638 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1639 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1640 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1641 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1642 default : break;
1643 }
1644 return;
1645 }
1646
1647 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1648 const methodHandle& attached_method,
1649 Bytecodes::Code byte, TRAPS) {
1650 Klass* defc = attached_method->method_holder();
1651 Symbol* name = attached_method->name();
1652 Symbol* type = attached_method->signature();
1653 LinkInfo link_info(defc, name, type);
1654 switch(byte) {
1655 case Bytecodes::_invokevirtual:
1656 resolve_virtual_call(result, recv, recv->klass(), link_info,
1657 /*check_null_and_abstract=*/true, CHECK);
1658 break;
1659 case Bytecodes::_invokeinterface:
1660 resolve_interface_call(result, recv, recv->klass(), link_info,
1661 /*check_null_and_abstract=*/true, CHECK);
1662 break;
1663 case Bytecodes::_invokestatic:
1664 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1665 break;
1666 case Bytecodes::_invokespecial:
1667 resolve_special_call(result, recv, link_info, CHECK);
1668 break;
1669 default:
1670 fatal("bad call: %s", Bytecodes::name(byte));
1671 break;
1672 }
1673 }
1674
1675 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1676 LinkInfo link_info(pool, index, CHECK);
1677 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1678 }
1679
1680
1681 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1682 const constantPoolHandle& pool, int index, TRAPS) {
1683 LinkInfo link_info(pool, index, CHECK);
1684 resolve_special_call(result, recv, link_info, CHECK);
1685 }
1686
1687
1688 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1689 const constantPoolHandle& pool, int index,
1690 TRAPS) {
1691
1692 LinkInfo link_info(pool, index, CHECK);
1693 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1694 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1695 }
1696
1697
1698 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1699 LinkInfo link_info(pool, index, CHECK);
1700 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1701 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1702 }
1703
1704
1705 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1706 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1707 LinkInfo link_info(pool, index, CHECK);
1708 if (TraceMethodHandles) {
1709 ResourceMark rm(THREAD);
1710 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1711 link_info.signature()->as_C_string());
1712 }
1713 resolve_handle_call(result, link_info, CHECK);
1714 }
1715
1716 void LinkResolver::resolve_handle_call(CallInfo& result,
1717 const LinkInfo& link_info,
1718 TRAPS) {
1719 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1720 Klass* resolved_klass = link_info.resolved_klass();
1721 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1722 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1723 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1724 Handle resolved_appendix;
1725 Handle resolved_method_type;
1726 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1727 &resolved_appendix, &resolved_method_type, CHECK);
1728 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1729 }
1730
1731 static void wrap_invokedynamic_exception(TRAPS) {
1732 if (HAS_PENDING_EXCEPTION) {
1733 // See the "Linking Exceptions" section for the invokedynamic instruction
1734 // in JVMS 6.5.
1735 if (PENDING_EXCEPTION->is_a(SystemDictionary::Error_klass())) {
1736 // Pass through an Error, including BootstrapMethodError, any other form
1737 // of linkage error, or say ThreadDeath/OutOfMemoryError
1738 if (TraceMethodHandles) {
1739 tty->print_cr("invokedynamic passes through an Error for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1740 PENDING_EXCEPTION->print();
1741 }
1742 return;
1743 }
1744
1745 // Otherwise wrap the exception in a BootstrapMethodError
1746 if (TraceMethodHandles) {
1747 tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1748 PENDING_EXCEPTION->print();
1749 }
1750 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1751 CLEAR_PENDING_EXCEPTION;
1752 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1753 }
1754 }
1755
1756 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1757 Symbol* method_name = pool->name_ref_at(index);
1758 Symbol* method_signature = pool->signature_ref_at(index);
1759 Klass* current_klass = pool->pool_holder();
1760
1761 // Resolve the bootstrap specifier (BSM + optional arguments).
1762 Handle bootstrap_specifier;
1763 // Check if CallSite has been bound already:
1764 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1765 if (cpce->is_f1_null()) {
1766 int pool_index = cpce->constant_pool_index();
1767 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1768 wrap_invokedynamic_exception(CHECK);
1769 assert(bsm_info != NULL, "");
1770 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1771 bootstrap_specifier = Handle(THREAD, bsm_info);
1772 }
1773 if (!cpce->is_f1_null()) {
1774 methodHandle method( THREAD, cpce->f1_as_method());
1775 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1776 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1777 result.set_handle(method, appendix, method_type, THREAD);
1778 wrap_invokedynamic_exception(CHECK);
1779 return;
1780 }
1781
1782 if (TraceMethodHandles) {
1783 ResourceMark rm(THREAD);
1784 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1785 ConstantPool::decode_invokedynamic_index(index),
1786 method_name->as_C_string(), method_signature->as_C_string(),
1787 current_klass->name()->as_C_string());
1788 tty->print(" BSM info: "); bootstrap_specifier->print();
1789 }
1790
1791 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1792 }
1793
1794 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1795 Handle bootstrap_specifier,
1796 Symbol* method_name, Symbol* method_signature,
1797 Klass* current_klass,
1798 TRAPS) {
1799 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1800 // The appendix argument is likely to be a freshly-created CallSite.
1801 Handle resolved_appendix;
1802 Handle resolved_method_type;
1803 methodHandle resolved_method =
1804 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1805 bootstrap_specifier,
1806 method_name, method_signature,
1807 &resolved_appendix,
1808 &resolved_method_type,
1809 THREAD);
1810 wrap_invokedynamic_exception(CHECK);
1811 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1812 wrap_invokedynamic_exception(CHECK);
1813 }