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 "jvm.h"
27 #include "classfile/defaultMethods.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/resolutionErrors.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "gc/shared/collectedHeap.inline.hpp"
35 #include "interpreter/bytecode.hpp"
36 #include "interpreter/interpreterRuntime.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.inline.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayOop.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "prims/methodHandles.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "runtime/compilationPolicy.hpp"
49 #include "runtime/fieldDescriptor.hpp"
50 #include "runtime/frame.inline.hpp"
51 #include "runtime/handles.inline.hpp"
52 #include "runtime/reflection.hpp"
53 #include "runtime/signature.hpp"
54 #include "runtime/thread.inline.hpp"
55 #include "runtime/vmThread.hpp"
56
57
58 //------------------------------------------------------------------------------------------------------------------------
59 // Implementation of CallInfo
60
61
62 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
63 int vtable_index = Method::nonvirtual_vtable_index;
64 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
65 }
66
67
68 void CallInfo::set_interface(Klass* resolved_klass,
69 Klass* selected_klass,
70 const methodHandle& resolved_method,
71 const methodHandle& selected_method,
72 int itable_index, TRAPS) {
73 // This is only called for interface methods. If the resolved_method
74 // comes from java/lang/Object, it can be the subject of a virtual call, so
75 // we should pick the vtable index from the resolved method.
76 // In that case, the caller must call set_virtual instead of set_interface.
77 assert(resolved_method->method_holder()->is_interface(), "");
78 assert(itable_index == resolved_method()->itable_index(), "");
79 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
80 }
81
82 void CallInfo::set_virtual(Klass* resolved_klass,
83 Klass* selected_klass,
84 const methodHandle& resolved_method,
85 const methodHandle& selected_method,
86 int vtable_index, TRAPS) {
87 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
88 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
89 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
90 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
91 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
92 }
93
94 void CallInfo::set_handle(const methodHandle& resolved_method,
95 Handle resolved_appendix,
96 Handle resolved_method_type, TRAPS) {
97 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
98 }
99
100 void CallInfo::set_handle(Klass* resolved_klass,
101 const methodHandle& resolved_method,
102 Handle resolved_appendix,
103 Handle resolved_method_type, TRAPS) {
104 if (resolved_method.is_null()) {
105 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
106 }
107 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
108 resolved_method->is_compiled_lambda_form(),
109 "linkMethod must return one of these");
110 int vtable_index = Method::nonvirtual_vtable_index;
111 assert(!resolved_method->has_vtable_index(), "");
112 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
113 _resolved_appendix = resolved_appendix;
114 _resolved_method_type = resolved_method_type;
115 }
116
117 void CallInfo::set_common(Klass* resolved_klass,
118 Klass* selected_klass,
119 const methodHandle& resolved_method,
120 const methodHandle& selected_method,
121 CallKind kind,
122 int index,
123 TRAPS) {
124 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
125 _resolved_klass = resolved_klass;
126 _selected_klass = selected_klass;
127 _resolved_method = resolved_method;
128 _selected_method = selected_method;
129 _call_kind = kind;
130 _call_index = index;
131 _resolved_appendix = Handle();
132 DEBUG_ONLY(verify()); // verify before making side effects
133
134 CompilationPolicy::compile_if_required(selected_method, THREAD);
135 }
136
137 // utility query for unreflecting a method
138 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
139 Klass* resolved_method_holder = resolved_method->method_holder();
140 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
141 resolved_klass = resolved_method_holder;
142 }
143 _resolved_klass = resolved_klass;
144 _selected_klass = resolved_klass;
145 _resolved_method = resolved_method;
146 _selected_method = resolved_method;
147 // classify:
148 CallKind kind = CallInfo::unknown_kind;
149 int index = resolved_method->vtable_index();
150 if (resolved_method->can_be_statically_bound()) {
151 kind = CallInfo::direct_call;
152 } else if (!resolved_method_holder->is_interface()) {
153 // Could be an Object method inherited into an interface, but still a vtable call.
154 kind = CallInfo::vtable_call;
155 } else if (!resolved_klass->is_interface()) {
156 // A default or miranda method. Compute the vtable index.
157 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
158 resolved_method);
159 assert(index >= 0 , "we should have valid vtable index at this point");
160
161 kind = CallInfo::vtable_call;
162 } else if (resolved_method->has_vtable_index()) {
163 // Can occur if an interface redeclares a method of Object.
164
165 #ifdef ASSERT
166 // Ensure that this is really the case.
167 Klass* object_klass = SystemDictionary::Object_klass();
168 Method * object_resolved_method = object_klass->vtable().method_at(index);
169 assert(object_resolved_method->name() == resolved_method->name(),
170 "Object and interface method names should match at vtable index %d, %s != %s",
171 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
172 assert(object_resolved_method->signature() == resolved_method->signature(),
173 "Object and interface method signatures should match at vtable index %d, %s != %s",
174 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
175 #endif // ASSERT
176
177 kind = CallInfo::vtable_call;
178 } else {
179 // A regular interface call.
180 kind = CallInfo::itable_call;
181 index = resolved_method->itable_index();
182 }
183 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
184 _call_kind = kind;
185 _call_index = index;
186 _resolved_appendix = Handle();
187 // Find or create a ResolvedMethod instance for this Method*
188 set_resolved_method_name(CHECK);
189
190 DEBUG_ONLY(verify());
191 }
192
193 void CallInfo::set_resolved_method_name(TRAPS) {
194 Method* m = _resolved_method();
195 assert(m != NULL, "Should already have a Method*");
196 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
197 _resolved_method_name = Handle(THREAD, rmethod_name);
198 }
199
200 #ifdef ASSERT
201 void CallInfo::verify() {
202 switch (call_kind()) { // the meaning and allowed value of index depends on kind
203 case CallInfo::direct_call:
204 if (_call_index == Method::nonvirtual_vtable_index) break;
205 // else fall through to check vtable index:
206 case CallInfo::vtable_call:
207 assert(resolved_klass()->verify_vtable_index(_call_index), "");
208 break;
209 case CallInfo::itable_call:
210 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
211 break;
212 case CallInfo::unknown_kind:
213 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
214 break;
215 default:
216 fatal("Unexpected call kind %d", call_kind());
217 }
218 }
219 #endif //ASSERT
220
221 #ifndef PRODUCT
222 void CallInfo::print() {
223 ResourceMark rm;
224 const char* kindstr;
225 switch (_call_kind) {
226 case direct_call: kindstr = "direct"; break;
227 case vtable_call: kindstr = "vtable"; break;
228 case itable_call: kindstr = "itable"; break;
229 default : kindstr = "unknown"; break;
230 }
231 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
232 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
233 }
234 #endif
235
236 //------------------------------------------------------------------------------------------------------------------------
237 // Implementation of LinkInfo
238
239 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
240 // resolve klass
241 _resolved_klass = pool->klass_ref_at(index, CHECK);
242
243 // Get name, signature, and static klass
244 _name = pool->name_ref_at(index);
245 _signature = pool->signature_ref_at(index);
246 _tag = pool->tag_ref_at(index);
247 _current_klass = pool->pool_holder();
248 _current_method = current_method;
249
250 // Coming from the constant pool always checks access
251 _check_access = true;
252 }
253
254 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
255 // resolve klass
256 _resolved_klass = pool->klass_ref_at(index, CHECK);
257
258 // Get name, signature, and static klass
259 _name = pool->name_ref_at(index);
260 _signature = pool->signature_ref_at(index);
261 _tag = pool->tag_ref_at(index);
262 _current_klass = pool->pool_holder();
263 _current_method = methodHandle();
264
265 // Coming from the constant pool always checks access
266 _check_access = true;
267 }
268
269 char* LinkInfo::method_string() const {
270 return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature);
271 }
272
273 #ifndef PRODUCT
274 void LinkInfo::print() {
275 ResourceMark rm;
276 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
277 _resolved_klass->name()->as_C_string(),
278 _name->as_C_string(),
279 _signature->as_C_string(),
280 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
281 _check_access ? "true" : "false");
282 }
283 #endif // PRODUCT
284 //------------------------------------------------------------------------------------------------------------------------
285 // Klass resolution
286
287 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass, TRAPS) {
288 Reflection::VerifyClassAccessResults vca_result =
289 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(sel_klass), true);
290 if (vca_result != Reflection::ACCESS_OK) {
291 ResourceMark rm(THREAD);
292 char* msg = Reflection::verify_class_access_msg(ref_klass,
293 InstanceKlass::cast(sel_klass),
294 vca_result);
295 if (msg == NULL) {
296 Exceptions::fthrow(
297 THREAD_AND_LOCATION,
298 vmSymbols::java_lang_IllegalAccessError(),
299 "failed to access class %s from class %s",
300 sel_klass->external_name(),
301 ref_klass->external_name());
302 } else {
303 // Use module specific message returned by verify_class_access_msg().
304 Exceptions::fthrow(
305 THREAD_AND_LOCATION,
306 vmSymbols::java_lang_IllegalAccessError(),
307 "%s", msg);
308 }
309 }
310 }
311
312 //------------------------------------------------------------------------------------------------------------------------
313 // Method resolution
314 //
315 // According to JVM spec. $5.4.3c & $5.4.3d
316
317 // Look up method in klasses, including static methods
318 // Then look up local default methods
319 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
320 bool checkpolymorphism,
321 bool in_imethod_resolve) {
322 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
323
324 Klass* klass = link_info.resolved_klass();
325 Symbol* name = link_info.name();
326 Symbol* signature = link_info.signature();
327
328 // Ignore overpasses so statics can be found during resolution
329 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
330
331 if (klass->is_array_klass()) {
332 // Only consider klass and super klass for arrays
333 return result;
334 }
335
336 InstanceKlass* ik = InstanceKlass::cast(klass);
337
338 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
339 // ignore static and non-public methods of java.lang.Object,
340 // like clone, finalize, registerNatives.
341 if (in_imethod_resolve &&
342 result != NULL &&
343 ik->is_interface() &&
344 (result->is_static() || !result->is_public()) &&
345 result->method_holder() == SystemDictionary::Object_klass()) {
346 result = NULL;
347 }
348
349 // Before considering default methods, check for an overpass in the
350 // current class if a method has not been found.
351 if (result == NULL) {
352 result = ik->find_method(name, signature);
353 }
354
355 if (result == NULL) {
356 Array<Method*>* default_methods = ik->default_methods();
357 if (default_methods != NULL) {
358 result = InstanceKlass::find_method(default_methods, name, signature);
359 }
360 }
361
362 if (checkpolymorphism && result != NULL) {
363 vmIntrinsics::ID iid = result->intrinsic_id();
364 if (MethodHandles::is_signature_polymorphic(iid)) {
365 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
366 return NULL;
367 }
368 }
369 return result;
370 }
371
372 // returns first instance method
373 // Looks up method in classes, then looks up local default methods
374 methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
375 Symbol* name,
376 Symbol* signature, TRAPS) {
377 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
378
379 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
380 Klass* super_klass = result->method_holder()->super();
381 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
382 }
383
384 if (klass->is_array_klass()) {
385 // Only consider klass and super klass for arrays
386 return methodHandle(THREAD, result);
387 }
388
389 if (result == NULL) {
390 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
391 if (default_methods != NULL) {
392 result = InstanceKlass::find_method(default_methods, name, signature);
393 assert(result == NULL || !result->is_static(), "static defaults not allowed");
394 }
395 }
396 return methodHandle(THREAD, result);
397 }
398
399 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
400 const methodHandle& resolved_method) {
401
402 int vtable_index = Method::invalid_vtable_index;
403 Symbol* name = resolved_method->name();
404 Symbol* signature = resolved_method->signature();
405 InstanceKlass* ik = InstanceKlass::cast(klass);
406
407 // First check in default method array
408 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
409 int index = InstanceKlass::find_method_index(ik->default_methods(),
410 name, signature, Klass::find_overpass,
411 Klass::find_static, Klass::find_private);
412 if (index >= 0 ) {
413 vtable_index = ik->default_vtable_indices()->at(index);
414 }
415 }
416 if (vtable_index == Method::invalid_vtable_index) {
417 // get vtable_index for miranda methods
418 klassVtable vt = ik->vtable();
419 vtable_index = vt.index_of_miranda(name, signature);
420 }
421 return vtable_index;
422 }
423
424 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
425 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
426
427 // Specify 'true' in order to skip default methods when searching the
428 // interfaces. Function lookup_method_in_klasses() already looked for
429 // the method in the default methods table.
430 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
431 }
432
433 methodHandle LinkResolver::lookup_polymorphic_method(
434 const LinkInfo& link_info,
435 Handle *appendix_result_or_null,
436 Handle *method_type_result,
437 TRAPS) {
438 Klass* klass = link_info.resolved_klass();
439 Symbol* name = link_info.name();
440 Symbol* full_signature = link_info.signature();
441
442 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
443 if (TraceMethodHandles) {
444 ResourceMark rm(THREAD);
445 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
446 vmIntrinsics::name_at(iid), klass->external_name(),
447 name->as_C_string(), full_signature->as_C_string());
448 }
449 if ((klass == SystemDictionary::MethodHandle_klass() ||
450 klass == SystemDictionary::VarHandle_klass()) &&
451 iid != vmIntrinsics::_none) {
452 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
453 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
454 // Do not erase last argument type (MemberName) if it is a static linkTo method.
455 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
456 TempNewSymbol basic_signature =
457 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
458 if (TraceMethodHandles) {
459 ResourceMark rm(THREAD);
460 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
461 name->as_C_string(),
462 full_signature->as_C_string(),
463 basic_signature->as_C_string());
464 }
465 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
466 basic_signature,
467 CHECK_NULL);
468 if (result.not_null()) {
469 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
470 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
471 assert(basic_signature == result->signature(), "predict the result signature");
472 if (TraceMethodHandles) {
473 ttyLocker ttyl;
474 tty->print("lookup_polymorphic_method => intrinsic ");
475 result->print_on(tty);
476 }
477 }
478 return result;
479 } else if (iid == vmIntrinsics::_invokeGeneric
480 && THREAD->can_call_java()
481 && appendix_result_or_null != NULL) {
482 // This is a method with type-checking semantics.
483 // We will ask Java code to spin an adapter method for it.
484 if (!MethodHandles::enabled()) {
485 // Make sure the Java part of the runtime has been booted up.
486 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
487 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
488 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
489 Handle(),
490 Handle(),
491 true,
492 CHECK_NULL);
493 }
494 }
495
496 Handle appendix;
497 Handle method_type;
498 methodHandle result = SystemDictionary::find_method_handle_invoker(
499 klass,
500 name,
501 full_signature,
502 link_info.current_klass(),
503 &appendix,
504 &method_type,
505 CHECK_NULL);
506 if (TraceMethodHandles) {
507 ttyLocker ttyl;
508 tty->print("lookup_polymorphic_method => (via Java) ");
509 result->print_on(tty);
510 tty->print(" lookup_polymorphic_method => appendix = ");
511 if (appendix.is_null()) tty->print_cr("(none)");
512 else appendix->print_on(tty);
513 }
514 if (result.not_null()) {
515 #ifdef ASSERT
516 ResourceMark rm(THREAD);
517
518 TempNewSymbol basic_signature =
519 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
520 int actual_size_of_params = result->size_of_parameters();
521 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
522 // +1 for MethodHandle.this, +1 for trailing MethodType
523 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
524 if (appendix.not_null()) expected_size_of_params += 1;
525 if (actual_size_of_params != expected_size_of_params) {
526 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
527 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
528 result->print();
529 }
530 assert(actual_size_of_params == expected_size_of_params,
531 "%d != %d", actual_size_of_params, expected_size_of_params);
532 #endif //ASSERT
533
534 assert(appendix_result_or_null != NULL, "");
535 (*appendix_result_or_null) = appendix;
536 (*method_type_result) = method_type;
537 }
538 return result;
539 }
540 }
541 return NULL;
542 }
543
544 void LinkResolver::check_method_accessability(Klass* ref_klass,
545 Klass* resolved_klass,
546 Klass* sel_klass,
547 const methodHandle& sel_method,
548 TRAPS) {
549
550 AccessFlags flags = sel_method->access_flags();
551
552 // Special case: arrays always override "clone". JVMS 2.15.
553 // If the resolved klass is an array class, and the declaring class
554 // is java.lang.Object and the method is "clone", set the flags
555 // to public.
556 //
557 // We'll check for the method name first, as that's most likely
558 // to be false (so we'll short-circuit out of these tests).
559 if (sel_method->name() == vmSymbols::clone_name() &&
560 sel_klass == SystemDictionary::Object_klass() &&
561 resolved_klass->is_array_klass()) {
562 // We need to change "protected" to "public".
563 assert(flags.is_protected(), "clone not protected?");
564 jint new_flags = flags.as_int();
565 new_flags = new_flags & (~JVM_ACC_PROTECTED);
566 new_flags = new_flags | JVM_ACC_PUBLIC;
567 flags.set_flags(new_flags);
568 }
569 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
570
571 if (!Reflection::verify_field_access(ref_klass,
572 resolved_klass,
573 sel_klass,
574 flags,
575 true)) {
576 // Propagate any existing exceptions that may have been thrown
577 if (HAS_PENDING_EXCEPTION) {
578 return;
579 }
580 ResourceMark rm(THREAD);
581 Exceptions::fthrow(
582 THREAD_AND_LOCATION,
583 vmSymbols::java_lang_IllegalAccessError(),
584 "tried to access method %s.%s%s from class %s",
585 sel_klass->external_name(),
586 sel_method->name()->as_C_string(),
587 sel_method->signature()->as_C_string(),
588 ref_klass->external_name()
589 );
590 return;
591 }
592 }
593
594 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
595 const constantPoolHandle& pool, int index, TRAPS) {
596 // This method is used only
597 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
598 // and
599 // (2) in Bytecode_invoke::static_target
600 // It appears to fail when applied to an invokeinterface call site.
601 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
602 // resolve klass
603 if (code == Bytecodes::_invokedynamic) {
604 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
605 Symbol* method_name = vmSymbols::invoke_name();
606 Symbol* method_signature = pool->signature_ref_at(index);
607 Klass* current_klass = pool->pool_holder();
608 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
609 return resolve_method(link_info, code, THREAD);
610 }
611
612 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
613 Klass* resolved_klass = link_info.resolved_klass();
614
615 if (pool->has_preresolution()
616 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
617 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
618 Method* result = ConstantPool::method_at_if_loaded(pool, index);
619 if (result != NULL) {
620 return methodHandle(THREAD, result);
621 }
622 }
623
624 if (code == Bytecodes::_invokeinterface) {
625 return resolve_interface_method(link_info, code, THREAD);
626 } else if (code == Bytecodes::_invokevirtual) {
627 return resolve_method(link_info, code, THREAD);
628 } else if (!resolved_klass->is_interface()) {
629 return resolve_method(link_info, code, THREAD);
630 } else {
631 return resolve_interface_method(link_info, code, THREAD);
632 }
633 }
634
635 // Check and print a loader constraint violation message for method or interface method
636 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
637 const methodHandle& resolved_method,
638 const char* method_type, TRAPS) {
639 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
640 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
641
642 ResourceMark rm(THREAD);
643 Symbol* failed_type_symbol =
644 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
645 resolved_loader, true, CHECK);
646 if (failed_type_symbol != NULL) {
647 const char* msg = "loader constraint violation: when resolving %s"
648 " \"%s\" the class loader (instance of %s) of the current class, %s,"
649 " and the class loader (instance of %s) for the method's defining class, %s, have"
650 " different Class objects for the type %s used in the signature";
651 char* sig = link_info.method_string();
652 const char* loader1_name = SystemDictionary::loader_name(current_loader());
653 char* current = link_info.current_klass()->name()->as_C_string();
654 const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
655 char* target = resolved_method->method_holder()->name()->as_C_string();
656 char* failed_type_name = failed_type_symbol->as_C_string();
657 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
658 strlen(current) + strlen(loader2_name) + strlen(target) +
659 strlen(failed_type_name) + strlen(method_type) + 1;
660 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
661 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
662 target, failed_type_name);
663 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
664 }
665 }
666
667 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
668 Klass* current_klass,
669 Klass* sel_klass, TRAPS) {
670 Handle ref_loader(THREAD, current_klass->class_loader());
671 Handle sel_loader(THREAD, sel_klass->class_loader());
672
673 ResourceMark rm(THREAD); // needed for check_signature_loaders
674 Symbol* failed_type_symbol =
675 SystemDictionary::check_signature_loaders(sig,
676 ref_loader, sel_loader,
677 false,
678 CHECK);
679 if (failed_type_symbol != NULL) {
680 const char* msg = "loader constraint violation: when resolving field"
681 " \"%s\" the class loader (instance of %s) of the referring class, "
682 "%s, and the class loader (instance of %s) for the field's resolved "
683 "type, %s, have different Class objects for that type";
684 char* field_name = field->as_C_string();
685 const char* loader1_name = SystemDictionary::loader_name(ref_loader());
686 char* sel = sel_klass->name()->as_C_string();
687 const char* loader2_name = SystemDictionary::loader_name(sel_loader());
688 char* failed_type_name = failed_type_symbol->as_C_string();
689 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
690 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
691 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
692 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
693 failed_type_name);
694 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
695 }
696 }
697
698 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
699 Bytecodes::Code code, TRAPS) {
700
701 Handle nested_exception;
702 Klass* resolved_klass = link_info.resolved_klass();
703
704 // 1. For invokevirtual, cannot call an interface method
705 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
706 ResourceMark rm(THREAD);
707 char buf[200];
708 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
709 resolved_klass->external_name());
710 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
711 }
712
713 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
714 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
715 ResourceMark rm(THREAD);
716 char buf[200];
717 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
718 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
719 }
720
721 // 3. lookup method in resolved klass and its super klasses
722 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
723
724 // 4. lookup method in all the interfaces implemented by the resolved klass
725 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
726 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
727
728 if (resolved_method.is_null()) {
729 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
730 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
731 if (HAS_PENDING_EXCEPTION) {
732 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
733 CLEAR_PENDING_EXCEPTION;
734 }
735 }
736 }
737
738 // 5. method lookup failed
739 if (resolved_method.is_null()) {
740 ResourceMark rm(THREAD);
741 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
742 Method::name_and_sig_as_C_string(resolved_klass,
743 link_info.name(),
744 link_info.signature()),
745 nested_exception, NULL);
746 }
747
748 // 6. access checks, access checking may be turned off when calling from within the VM.
749 Klass* current_klass = link_info.current_klass();
750 if (link_info.check_access()) {
751 assert(current_klass != NULL , "current_klass should not be null");
752
753 // check if method can be accessed by the referring class
754 check_method_accessability(current_klass,
755 resolved_klass,
756 resolved_method->method_holder(),
757 resolved_method,
758 CHECK_NULL);
759
760 // check loader constraints
761 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
762 }
763
764 // For private method invocation we should only find the method in the resolved class.
765 // If that is not the case then we have a found a supertype method that we have nestmate
766 // access to.
767 // FIXME: the "ignoring xxx" part is for debugging only
768 if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) {
769 ResourceMark rm(THREAD);
770 DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);)
771 assert(is_nestmate, "was only expecting nestmates to get here!");
772 Exceptions::fthrow(
773 THREAD_AND_LOCATION,
774 vmSymbols::java_lang_NoSuchMethodError(),
775 "%s: method %s%s not found (ignoring %s)",
776 resolved_klass->external_name(),
777 resolved_method->name()->as_C_string(),
778 resolved_method->signature()->as_C_string(),
779 resolved_method->method_holder()->external_name()
780 );
781 return NULL;
782 }
783
784 return resolved_method;
785 }
786
787 static void trace_method_resolution(const char* prefix,
788 Klass* klass,
789 Klass* resolved_klass,
790 const methodHandle& method,
791 bool logitables,
792 int index = -1) {
793 #ifndef PRODUCT
794 ResourceMark rm;
795 Log(itables) logi;
796 LogStream lsi(logi.trace());
797 Log(vtables) logv;
798 LogStream lsv(logv.trace());
799 outputStream* st;
800 if (logitables) {
801 st = &lsi;
802 } else {
803 st = &lsv;
804 }
805 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
806 prefix,
807 (klass == NULL ? "<NULL>" : klass->internal_name()),
808 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
809 Method::name_and_sig_as_C_string(resolved_klass,
810 method->name(),
811 method->signature()),
812 method->method_holder()->internal_name());
813 method->print_linkage_flags(st);
814 if (index != -1) {
815 st->print("vtable_index:%d", index);
816 }
817 st->cr();
818 #endif // PRODUCT
819 }
820
821 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
822 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
823
824 Klass* resolved_klass = link_info.resolved_klass();
825
826 // check if klass is interface
827 if (!resolved_klass->is_interface()) {
828 ResourceMark rm(THREAD);
829 char buf[200];
830 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
831 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
832 }
833
834 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
835 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
836 ResourceMark rm(THREAD);
837 char buf[200];
838 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
839 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
840 }
841
842 // lookup method in this interface or its super, java.lang.Object
843 // JDK8: also look for static methods
844 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
845
846 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
847 // lookup method in all the super-interfaces
848 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
849 }
850
851 if (resolved_method.is_null()) {
852 // no method found
853 ResourceMark rm(THREAD);
854 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
855 Method::name_and_sig_as_C_string(resolved_klass,
856 link_info.name(),
857 link_info.signature()));
858 }
859
860 if (link_info.check_access()) {
861 // JDK8 adds non-public interface methods, and accessability check requirement
862 Klass* current_klass = link_info.current_klass();
863
864 assert(current_klass != NULL , "current_klass should not be null");
865
866 // check if method can be accessed by the referring class
867 check_method_accessability(current_klass,
868 resolved_klass,
869 resolved_method->method_holder(),
870 resolved_method,
871 CHECK_NULL);
872
873 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
874 }
875
876 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
877 ResourceMark rm(THREAD);
878 char buf[200];
879 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
880 Method::name_and_sig_as_C_string(resolved_klass,
881 resolved_method->name(), resolved_method->signature()));
882 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
883 }
884
885 if (log_develop_is_enabled(Trace, itables)) {
886 char buf[200];
887 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
888 Bytecodes::name(code));
889 trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
890 resolved_method, true);
891 }
892
893 return resolved_method;
894 }
895
896 //------------------------------------------------------------------------------------------------------------------------
897 // Field resolution
898
899 void LinkResolver::check_field_accessability(Klass* ref_klass,
900 Klass* resolved_klass,
901 Klass* sel_klass,
902 const fieldDescriptor& fd,
903 TRAPS) {
904 if (!Reflection::verify_field_access(ref_klass,
905 resolved_klass,
906 sel_klass,
907 fd.access_flags(),
908 true)) {
909 // Propagate any existing exceptions that may have been thrown
910 if (HAS_PENDING_EXCEPTION) {
911 return;
912 }
913
914 ResourceMark rm(THREAD);
915 Exceptions::fthrow(
916 THREAD_AND_LOCATION,
917 vmSymbols::java_lang_IllegalAccessError(),
918 "tried to access field %s.%s from class %s",
919 sel_klass->external_name(),
920 fd.name()->as_C_string(),
921 ref_klass->external_name()
922 );
923 return;
924 }
925 }
926
927 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
928 LinkInfo link_info(pool, index, method, CHECK);
929 resolve_field(fd, link_info, byte, true, CHECK);
930 }
931
932 void LinkResolver::resolve_field(fieldDescriptor& fd,
933 const LinkInfo& link_info,
934 Bytecodes::Code byte, bool initialize_class,
935 TRAPS) {
936 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
937 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
938 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
939 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
940
941 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
942 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
943 // Check if there's a resolved klass containing the field
944 Klass* resolved_klass = link_info.resolved_klass();
945 Symbol* field = link_info.name();
946 Symbol* sig = link_info.signature();
947
948 if (resolved_klass == NULL) {
949 ResourceMark rm(THREAD);
950 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
951 }
952
953 // Resolve instance field
954 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
955 // check if field exists; i.e., if a klass containing the field def has been selected
956 if (sel_klass == NULL) {
957 ResourceMark rm(THREAD);
958 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
959 }
960
961 if (!link_info.check_access())
962 // Access checking may be turned off when calling from within the VM.
963 return;
964
965 // check access
966 Klass* current_klass = link_info.current_klass();
967 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
968
969 // check for errors
970 if (is_static != fd.is_static()) {
971 ResourceMark rm(THREAD);
972 char msg[200];
973 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
974 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
975 }
976
977 // A final field can be modified only
978 // (1) by methods declared in the class declaring the field and
979 // (2) by the <clinit> method (in case of a static field)
980 // or by the <init> method (in case of an instance field).
981 if (is_put && fd.access_flags().is_final()) {
982 ResourceMark rm(THREAD);
983 stringStream ss;
984
985 if (sel_klass != current_klass) {
986 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
987 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
988 current_klass->external_name());
989 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
990 }
991
992 if (fd.constants()->pool_holder()->major_version() >= 53) {
993 methodHandle m = link_info.current_method();
994 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
995 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
996 fd.is_static() &&
997 !m()->is_static_initializer());
998 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
999 !fd.is_static() &&
1000 !m->is_object_initializer());
1001
1002 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1003 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1004 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1005 m()->name()->as_C_string(),
1006 is_static ? "<clinit>" : "<init>");
1007 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1008 }
1009 }
1010 }
1011
1012 // initialize resolved_klass if necessary
1013 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1014 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1015 //
1016 // note 2: we don't want to force initialization if we are just checking
1017 // if the field access is legal; e.g., during compilation
1018 if (is_static && initialize_class) {
1019 sel_klass->initialize(CHECK);
1020 }
1021
1022 if (sel_klass != current_klass) {
1023 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1024 }
1025
1026 // return information. note that the klass is set to the actual klass containing the
1027 // field, otherwise access of static fields in superclasses will not work.
1028 }
1029
1030
1031 //------------------------------------------------------------------------------------------------------------------------
1032 // Invoke resolution
1033 //
1034 // Naming conventions:
1035 //
1036 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1037 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1038 // resolved_klass the specified klass (i.e., specified via constant pool index)
1039 // recv_klass the receiver klass
1040
1041
1042 void LinkResolver::resolve_static_call(CallInfo& result,
1043 const LinkInfo& link_info,
1044 bool initialize_class, TRAPS) {
1045 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1046
1047 // The resolved class can change as a result of this resolution.
1048 Klass* resolved_klass = resolved_method->method_holder();
1049
1050 // Initialize klass (this should only happen if everything is ok)
1051 if (initialize_class && resolved_klass->should_be_initialized()) {
1052 resolved_klass->initialize(CHECK);
1053 // Use updated LinkInfo to reresolve with resolved method holder
1054 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1055 link_info.current_klass(),
1056 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1057 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1058 }
1059
1060 // setup result
1061 result.set_static(resolved_klass, resolved_method, CHECK);
1062 }
1063
1064 // throws linktime exceptions
1065 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1066
1067 Klass* resolved_klass = link_info.resolved_klass();
1068 methodHandle resolved_method;
1069 if (!resolved_klass->is_interface()) {
1070 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1071 } else {
1072 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1073 }
1074 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1075
1076 // check if static
1077 if (!resolved_method->is_static()) {
1078 ResourceMark rm(THREAD);
1079 char buf[200];
1080 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1081 resolved_method->name(),
1082 resolved_method->signature()));
1083 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1084 }
1085 return resolved_method;
1086 }
1087
1088
1089 void LinkResolver::resolve_special_call(CallInfo& result,
1090 Handle recv,
1091 const LinkInfo& link_info,
1092 TRAPS) {
1093 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1094 runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
1095 }
1096
1097 // throws linktime exceptions
1098 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1099 TRAPS) {
1100
1101 // Invokespecial is called for multiple special reasons:
1102 // <init>
1103 // local private method invocation, for classes and interfaces
1104 // superclass.method, which can also resolve to a default method
1105 // and the selected method is recalculated relative to the direct superclass
1106 // superinterface.method, which explicitly does not check shadowing
1107 Klass* resolved_klass = link_info.resolved_klass();
1108 methodHandle resolved_method;
1109
1110 if (!resolved_klass->is_interface()) {
1111 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1112 } else {
1113 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1114 }
1115
1116 // check if method name is <init>, that it is found in same klass as static type
1117 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1118 resolved_method->method_holder() != resolved_klass) {
1119 ResourceMark rm(THREAD);
1120 Exceptions::fthrow(
1121 THREAD_AND_LOCATION,
1122 vmSymbols::java_lang_NoSuchMethodError(),
1123 "%s: method %s%s not found",
1124 resolved_klass->external_name(),
1125 resolved_method->name()->as_C_string(),
1126 resolved_method->signature()->as_C_string()
1127 );
1128 return NULL;
1129 }
1130
1131 // check that invokespecial's interface method reference is in an indirect superinterface
1132 Klass* current_klass = link_info.current_klass();
1133 if (current_klass != NULL && resolved_klass->is_interface()) {
1134 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1135 InstanceKlass *klass_to_check = !ck->is_anonymous() ?
1136 ck :
1137 InstanceKlass::cast(ck->host_klass());
1138 // Disable verification for the dynamically-generated reflection bytecodes.
1139 bool is_reflect = klass_to_check->is_subclass_of(
1140 SystemDictionary::reflect_MagicAccessorImpl_klass());
1141
1142 if (!is_reflect &&
1143 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1144 ResourceMark rm(THREAD);
1145 char buf[200];
1146 jio_snprintf(buf, sizeof(buf),
1147 "Interface method reference: %s, is in an indirect superinterface of %s",
1148 Method::name_and_sig_as_C_string(resolved_klass,
1149 resolved_method->name(),
1150 resolved_method->signature()),
1151 current_klass->external_name());
1152 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1153 }
1154 }
1155
1156 // check if not static
1157 if (resolved_method->is_static()) {
1158 ResourceMark rm(THREAD);
1159 char buf[200];
1160 jio_snprintf(buf, sizeof(buf),
1161 "Expecting non-static method %s",
1162 Method::name_and_sig_as_C_string(resolved_klass,
1163 resolved_method->name(),
1164 resolved_method->signature()));
1165 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1166 }
1167
1168 // For private method invocation we should only find the method in the resolved class.
1169 // If that is not the case then we have a found a supertype method that we have nestmate
1170 // access to.
1171 // FIXME: the "ignoring xxx" part is for debugging only
1172 if (resolved_method->is_private() && resolved_method->method_holder() != resolved_klass) {
1173 ResourceMark rm(THREAD);
1174 DEBUG_ONLY(bool is_nestmate = InstanceKlass::cast(link_info.current_klass())->has_nestmate_access_to(InstanceKlass::cast(resolved_klass), THREAD);)
1175 assert(is_nestmate, "was only expecting nestmates here!");
1176 Exceptions::fthrow(
1177 THREAD_AND_LOCATION,
1178 vmSymbols::java_lang_NoSuchMethodError(),
1179 "%s: method %s%s not found (ignoring %s)",
1180 resolved_klass->external_name(),
1181 resolved_method->name()->as_C_string(),
1182 resolved_method->signature()->as_C_string(),
1183 resolved_method->method_holder()->external_name()
1184 );
1185 return NULL;
1186 }
1187
1188 if (log_develop_is_enabled(Trace, itables)) {
1189 trace_method_resolution("invokespecial resolved method: caller-class:",
1190 current_klass, resolved_klass, resolved_method, true);
1191 }
1192
1193 return resolved_method;
1194 }
1195
1196 // throws runtime exceptions
1197 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1198 const LinkInfo& link_info,
1199 const methodHandle& resolved_method,
1200 Handle recv, TRAPS) {
1201
1202 Klass* resolved_klass = link_info.resolved_klass();
1203
1204 // resolved method is selected method unless we have an old-style lookup
1205 // for a superclass method
1206 // Invokespecial for a superinterface, resolved method is selected method,
1207 // no checks for shadowing
1208 methodHandle sel_method(THREAD, resolved_method());
1209
1210 if (link_info.check_access() &&
1211 // check if the method is not <init>
1212 resolved_method->name() != vmSymbols::object_initializer_name()) {
1213
1214 // check if this is an old-style super call and do a new lookup if so
1215 // a) check if ACC_SUPER flag is set for the current class
1216 Klass* current_klass = link_info.current_klass();
1217 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1218 // b) check if the class of the resolved_klass is a superclass
1219 // (not supertype in order to exclude interface classes) of the current class.
1220 // This check is not performed for super.invoke for interface methods
1221 // in super interfaces.
1222 current_klass->is_subclass_of(resolved_klass) &&
1223 current_klass != resolved_klass &&
1224 // c) check the method is not private - we don't re-resolve private methods
1225 !resolved_method->is_private()
1226 ) {
1227 // Lookup super method
1228 Klass* super_klass = current_klass->super();
1229 sel_method = lookup_instance_method_in_klasses(super_klass,
1230 resolved_method->name(),
1231 resolved_method->signature(), CHECK);
1232 // check if found
1233 if (sel_method.is_null()) {
1234 ResourceMark rm(THREAD);
1235 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1236 Method::name_and_sig_as_C_string(resolved_klass,
1237 resolved_method->name(),
1238 resolved_method->signature()));
1239 // check loader constraints if found a different method
1240 } else if (sel_method() != resolved_method()) {
1241 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1242 }
1243 }
1244
1245 // Check that the class of objectref (the receiver) is the current class or interface,
1246 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1247 // throws IllegalAccessError.
1248 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1249 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1250 // a class. If the sender is an interface, the check has to be performed at runtime.
1251 InstanceKlass* cur_ik = InstanceKlass::cast(current_klass);
1252 InstanceKlass* sender = cur_ik->is_anonymous() ? cur_ik->host_klass() : cur_ik;
1253 if (sender->is_interface() && recv.not_null()) {
1254 Klass* receiver_klass = recv->klass();
1255 if (!receiver_klass->is_subtype_of(sender)) {
1256 ResourceMark rm(THREAD);
1257 char buf[500];
1258 jio_snprintf(buf, sizeof(buf),
1259 "Receiver class %s must be the current class or a subtype of interface %s",
1260 receiver_klass->name()->as_C_string(),
1261 sender->name()->as_C_string());
1262 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1263 }
1264 }
1265 }
1266
1267 // check if not static
1268 if (sel_method->is_static()) {
1269 ResourceMark rm(THREAD);
1270 char buf[200];
1271 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1272 resolved_method->name(),
1273 resolved_method->signature()));
1274 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1275 }
1276
1277 // check if abstract
1278 if (sel_method->is_abstract()) {
1279 ResourceMark rm(THREAD);
1280 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1281 Method::name_and_sig_as_C_string(resolved_klass,
1282 sel_method->name(),
1283 sel_method->signature()));
1284 }
1285
1286 if (log_develop_is_enabled(Trace, itables)) {
1287 trace_method_resolution("invokespecial selected method: resolved-class:",
1288 resolved_klass, resolved_klass, sel_method, true);
1289 }
1290
1291 // setup result
1292 result.set_static(resolved_klass, sel_method, CHECK);
1293 }
1294
1295 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1296 const LinkInfo& link_info,
1297 bool check_null_and_abstract, TRAPS) {
1298 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1299 runtime_resolve_virtual_method(result, resolved_method,
1300 link_info.resolved_klass(),
1301 recv, receiver_klass,
1302 check_null_and_abstract, CHECK);
1303 }
1304
1305 // throws linktime exceptions
1306 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1307 TRAPS) {
1308 // normal method resolution
1309 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1310
1311 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1312 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1313
1314 // check if private interface method
1315 Klass* resolved_klass = link_info.resolved_klass();
1316 Klass* current_klass = link_info.current_klass();
1317
1318 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1319 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1320 ResourceMark rm(THREAD);
1321 char buf[200];
1322 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1323 Method::name_and_sig_as_C_string(resolved_klass,
1324 resolved_method->name(),
1325 resolved_method->signature()),
1326 (current_klass == NULL ? "<NULL>" : current_klass->internal_name()));
1327 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1328 }
1329
1330 // check if not static
1331 if (resolved_method->is_static()) {
1332 ResourceMark rm(THREAD);
1333 char buf[200];
1334 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass,
1335 resolved_method->name(),
1336 resolved_method->signature()));
1337 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1338 }
1339
1340 if (log_develop_is_enabled(Trace, vtables)) {
1341 trace_method_resolution("invokevirtual resolved method: caller-class:",
1342 current_klass, resolved_klass, resolved_method, false);
1343 }
1344
1345 return resolved_method;
1346 }
1347
1348 // throws runtime exceptions
1349 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1350 const methodHandle& resolved_method,
1351 Klass* resolved_klass,
1352 Handle recv,
1353 Klass* recv_klass,
1354 bool check_null_and_abstract,
1355 TRAPS) {
1356
1357 // setup default return values
1358 int vtable_index = Method::invalid_vtable_index;
1359 methodHandle selected_method;
1360
1361 // runtime method resolution
1362 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1363 THROW(vmSymbols::java_lang_NullPointerException());
1364 }
1365
1366 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1367 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1368 // a missing receiver might result in a bogus lookup.
1369 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1370
1371 // do lookup based on receiver klass using the vtable index
1372 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1373 vtable_index = vtable_index_of_interface_method(resolved_klass,
1374 resolved_method);
1375 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1376
1377 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1378 } else {
1379 // at this point we are sure that resolved_method is virtual and not
1380 // a default or miranda method; therefore, it must have a valid vtable index.
1381 assert(!resolved_method->has_itable_index(), "");
1382 vtable_index = resolved_method->vtable_index();
1383 // We could get a negative vtable_index for final methods,
1384 // because as an optimization they are they are never put in the vtable,
1385 // unless they override an existing method.
1386 // If we do get a negative, it means the resolved method is the the selected
1387 // method, and it can never be changed by an override.
1388 if (vtable_index == Method::nonvirtual_vtable_index) {
1389 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1390 selected_method = resolved_method;
1391 } else {
1392 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1393 }
1394 }
1395
1396 // check if method exists
1397 if (selected_method.is_null()) {
1398 ResourceMark rm(THREAD);
1399 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1400 Method::name_and_sig_as_C_string(resolved_klass,
1401 resolved_method->name(),
1402 resolved_method->signature()));
1403 }
1404
1405 // check if abstract
1406 if (check_null_and_abstract && selected_method->is_abstract()) {
1407 ResourceMark rm(THREAD);
1408 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1409 Method::name_and_sig_as_C_string(resolved_klass,
1410 selected_method->name(),
1411 selected_method->signature()));
1412 }
1413
1414 if (log_develop_is_enabled(Trace, vtables)) {
1415 trace_method_resolution("invokevirtual selected method: receiver-class:",
1416 recv_klass, resolved_klass, selected_method,
1417 false, vtable_index);
1418 }
1419 // setup result
1420 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1421 }
1422
1423 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1424 const LinkInfo& link_info,
1425 bool check_null_and_abstract, TRAPS) {
1426 // throws linktime exceptions
1427 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1428 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1429 recv, recv_klass, check_null_and_abstract, CHECK);
1430 }
1431
1432 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1433 TRAPS) {
1434 // normal interface method resolution
1435 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1436 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1437 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1438
1439 return resolved_method;
1440 }
1441
1442 // throws runtime exceptions
1443 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1444 const methodHandle& resolved_method,
1445 Klass* resolved_klass,
1446 Handle recv,
1447 Klass* recv_klass,
1448 bool check_null_and_abstract, TRAPS) {
1449 // check if receiver exists
1450 if (check_null_and_abstract && recv.is_null()) {
1451 THROW(vmSymbols::java_lang_NullPointerException());
1452 }
1453
1454 // check if receiver klass implements the resolved interface
1455 if (!recv_klass->is_subtype_of(resolved_klass)) {
1456 ResourceMark rm(THREAD);
1457 char buf[200];
1458 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1459 recv_klass->external_name(),
1460 resolved_klass->external_name());
1461 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1462 }
1463
1464 methodHandle sel_method = resolved_method;
1465
1466 // resolve the method in the receiver class, unless it is private
1467 if (!resolved_method()->is_private()) {
1468 // do lookup based on receiver klass
1469 // This search must match the linktime preparation search for itable initialization
1470 // to correctly enforce loader constraints for interface method inheritance
1471 sel_method = lookup_instance_method_in_klasses(recv_klass,
1472 resolved_method->name(),
1473 resolved_method->signature(), CHECK);
1474
1475 if (sel_method.is_null() && !check_null_and_abstract) {
1476 // In theory this is a harmless placeholder value, but
1477 // in practice leaving in null affects the nsk default method tests.
1478 // This needs further study.
1479 sel_method = resolved_method;
1480 }
1481 // check if method exists
1482 if (sel_method.is_null()) {
1483 ResourceMark rm(THREAD);
1484 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1485 Method::name_and_sig_as_C_string(recv_klass,
1486 resolved_method->name(),
1487 resolved_method->signature()));
1488 }
1489 // check access
1490 // Throw Illegal Access Error if sel_method is not public.
1491 if (!sel_method->is_public()) {
1492 ResourceMark rm(THREAD);
1493 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1494 Method::name_and_sig_as_C_string(recv_klass,
1495 sel_method->name(),
1496 sel_method->signature()));
1497 }
1498 // check if abstract
1499 if (check_null_and_abstract && sel_method->is_abstract()) {
1500 ResourceMark rm(THREAD);
1501 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1502 Method::name_and_sig_as_C_string(recv_klass,
1503 sel_method->name(),
1504 sel_method->signature()));
1505 }
1506 }
1507
1508 if (log_develop_is_enabled(Trace, itables)) {
1509 trace_method_resolution("invokeinterface selected method: receiver-class:",
1510 recv_klass, resolved_klass, sel_method, true);
1511 }
1512 // setup result
1513 if (!resolved_method->has_itable_index()) {
1514 int vtable_index = resolved_method->vtable_index();
1515 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1516 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1517 } else {
1518 int itable_index = resolved_method()->itable_index();
1519 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1520 }
1521 }
1522
1523
1524 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1525 const LinkInfo& link_info) {
1526 EXCEPTION_MARK;
1527 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1528 if (HAS_PENDING_EXCEPTION) {
1529 CLEAR_PENDING_EXCEPTION;
1530 return methodHandle();
1531 } else {
1532 return method_result;
1533 }
1534 }
1535
1536 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1537 const LinkInfo& link_info) {
1538 EXCEPTION_MARK;
1539 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1540 if (HAS_PENDING_EXCEPTION) {
1541 CLEAR_PENDING_EXCEPTION;
1542 return methodHandle();
1543 } else {
1544 return method_result;
1545 }
1546 }
1547
1548 methodHandle LinkResolver::resolve_virtual_call_or_null(
1549 Klass* receiver_klass,
1550 const LinkInfo& link_info) {
1551 EXCEPTION_MARK;
1552 CallInfo info;
1553 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1554 if (HAS_PENDING_EXCEPTION) {
1555 CLEAR_PENDING_EXCEPTION;
1556 return methodHandle();
1557 }
1558 return info.selected_method();
1559 }
1560
1561 methodHandle LinkResolver::resolve_interface_call_or_null(
1562 Klass* receiver_klass,
1563 const LinkInfo& link_info) {
1564 EXCEPTION_MARK;
1565 CallInfo info;
1566 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1567 if (HAS_PENDING_EXCEPTION) {
1568 CLEAR_PENDING_EXCEPTION;
1569 return methodHandle();
1570 }
1571 return info.selected_method();
1572 }
1573
1574 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1575 const LinkInfo& link_info) {
1576 EXCEPTION_MARK;
1577 CallInfo info;
1578 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1579 /*check_null_or_abstract*/false, THREAD);
1580 if (HAS_PENDING_EXCEPTION) {
1581 CLEAR_PENDING_EXCEPTION;
1582 return Method::invalid_vtable_index;
1583 }
1584 return info.vtable_index();
1585 }
1586
1587 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1588 EXCEPTION_MARK;
1589 CallInfo info;
1590 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1591 if (HAS_PENDING_EXCEPTION) {
1592 CLEAR_PENDING_EXCEPTION;
1593 return methodHandle();
1594 }
1595 return info.selected_method();
1596 }
1597
1598 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1599 EXCEPTION_MARK;
1600 CallInfo info;
1601 resolve_special_call(info, Handle(), link_info, THREAD);
1602 if (HAS_PENDING_EXCEPTION) {
1603 CLEAR_PENDING_EXCEPTION;
1604 return methodHandle();
1605 }
1606 return info.selected_method();
1607 }
1608
1609
1610
1611 //------------------------------------------------------------------------------------------------------------------------
1612 // ConstantPool entries
1613
1614 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1615 switch (byte) {
1616 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1617 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1618 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1619 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1620 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1621 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1622 default : break;
1623 }
1624 return;
1625 }
1626
1627 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1628 const methodHandle& attached_method,
1629 Bytecodes::Code byte, TRAPS) {
1630 Klass* defc = attached_method->method_holder();
1631 Symbol* name = attached_method->name();
1632 Symbol* type = attached_method->signature();
1633 LinkInfo link_info(defc, name, type);
1634 switch(byte) {
1635 case Bytecodes::_invokevirtual:
1636 resolve_virtual_call(result, recv, recv->klass(), link_info,
1637 /*check_null_and_abstract=*/true, CHECK);
1638 break;
1639 case Bytecodes::_invokeinterface:
1640 resolve_interface_call(result, recv, recv->klass(), link_info,
1641 /*check_null_and_abstract=*/true, CHECK);
1642 break;
1643 case Bytecodes::_invokestatic:
1644 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1645 break;
1646 case Bytecodes::_invokespecial:
1647 resolve_special_call(result, recv, link_info, CHECK);
1648 break;
1649 default:
1650 fatal("bad call: %s", Bytecodes::name(byte));
1651 break;
1652 }
1653 }
1654
1655 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1656 LinkInfo link_info(pool, index, CHECK);
1657 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1658 }
1659
1660
1661 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1662 const constantPoolHandle& pool, int index, TRAPS) {
1663 LinkInfo link_info(pool, index, CHECK);
1664 resolve_special_call(result, recv, link_info, CHECK);
1665 }
1666
1667
1668 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1669 const constantPoolHandle& pool, int index,
1670 TRAPS) {
1671
1672 LinkInfo link_info(pool, index, CHECK);
1673 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1674 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1675 }
1676
1677
1678 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1679 LinkInfo link_info(pool, index, CHECK);
1680 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1681 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1682 }
1683
1684
1685 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1686 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1687 LinkInfo link_info(pool, index, CHECK);
1688 if (TraceMethodHandles) {
1689 ResourceMark rm(THREAD);
1690 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1691 link_info.signature()->as_C_string());
1692 }
1693 resolve_handle_call(result, link_info, CHECK);
1694 }
1695
1696 void LinkResolver::resolve_handle_call(CallInfo& result,
1697 const LinkInfo& link_info,
1698 TRAPS) {
1699 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1700 Klass* resolved_klass = link_info.resolved_klass();
1701 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1702 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1703 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1704 Handle resolved_appendix;
1705 Handle resolved_method_type;
1706 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1707 &resolved_appendix, &resolved_method_type, CHECK);
1708 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1709 }
1710
1711 static void wrap_invokedynamic_exception(TRAPS) {
1712 if (HAS_PENDING_EXCEPTION) {
1713 // See the "Linking Exceptions" section for the invokedynamic instruction
1714 // in JVMS 6.5.
1715 if (PENDING_EXCEPTION->is_a(SystemDictionary::Error_klass())) {
1716 // Pass through an Error, including BootstrapMethodError, any other form
1717 // of linkage error, or say ThreadDeath/OutOfMemoryError
1718 if (TraceMethodHandles) {
1719 tty->print_cr("invokedynamic passes through an Error for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1720 PENDING_EXCEPTION->print();
1721 }
1722 return;
1723 }
1724
1725 // Otherwise wrap the exception in a BootstrapMethodError
1726 if (TraceMethodHandles) {
1727 tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1728 PENDING_EXCEPTION->print();
1729 }
1730 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1731 CLEAR_PENDING_EXCEPTION;
1732 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1733 }
1734 }
1735
1736 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1737 Symbol* method_name = pool->name_ref_at(index);
1738 Symbol* method_signature = pool->signature_ref_at(index);
1739 Klass* current_klass = pool->pool_holder();
1740
1741 // Resolve the bootstrap specifier (BSM + optional arguments).
1742 Handle bootstrap_specifier;
1743 // Check if CallSite has been bound already:
1744 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1745 int pool_index = cpce->constant_pool_index();
1746
1747 if (cpce->is_f1_null()) {
1748 if (cpce->indy_resolution_failed()) {
1749 ConstantPool::throw_resolution_error(pool,
1750 ResolutionErrorTable::encode_cpcache_index(index),
1751 CHECK);
1752 }
1753
1754 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1755 // reference to a method handle which will be the bootstrap method for a dynamic
1756 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1757 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1758 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1759 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1760 // this bootstrap method will encounter the resolution of MethodHandleInError.
1761 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1762 wrap_invokedynamic_exception(CHECK);
1763 assert(bsm_info != NULL, "");
1764 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1765 bootstrap_specifier = Handle(THREAD, bsm_info);
1766 }
1767 if (!cpce->is_f1_null()) {
1768 methodHandle method( THREAD, cpce->f1_as_method());
1769 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1770 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1771 result.set_handle(method, appendix, method_type, THREAD);
1772 wrap_invokedynamic_exception(CHECK);
1773 return;
1774 }
1775
1776 if (TraceMethodHandles) {
1777 ResourceMark rm(THREAD);
1778 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1779 ConstantPool::decode_invokedynamic_index(index),
1780 method_name->as_C_string(), method_signature->as_C_string(),
1781 current_klass->name()->as_C_string());
1782 tty->print(" BSM info: "); bootstrap_specifier->print();
1783 }
1784
1785 resolve_dynamic_call(result, bootstrap_specifier, method_name,
1786 method_signature, current_klass, THREAD);
1787 if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1788 int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
1789 bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
1790 encoded_index,
1791 pool()->tag_at(pool_index),
1792 CHECK);
1793 if (!recorded_res_status) {
1794 // Another thread got here just before we did. So, either use the method
1795 // that it resolved or throw the LinkageError exception that it threw.
1796 if (!cpce->is_f1_null()) {
1797 methodHandle method( THREAD, cpce->f1_as_method());
1798 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1799 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1800 result.set_handle(method, appendix, method_type, THREAD);
1801 wrap_invokedynamic_exception(CHECK);
1802 } else {
1803 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
1804 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
1805 }
1806 return;
1807 }
1808 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
1809 }
1810 }
1811
1812 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1813 Handle bootstrap_specifier,
1814 Symbol* method_name, Symbol* method_signature,
1815 Klass* current_klass,
1816 TRAPS) {
1817 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1818 // The appendix argument is likely to be a freshly-created CallSite.
1819 Handle resolved_appendix;
1820 Handle resolved_method_type;
1821 methodHandle resolved_method =
1822 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1823 bootstrap_specifier,
1824 method_name, method_signature,
1825 &resolved_appendix,
1826 &resolved_method_type,
1827 THREAD);
1828 wrap_invokedynamic_exception(CHECK);
1829 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1830 wrap_invokedynamic_exception(CHECK);
1831 }