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