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