1 /*
2 * Copyright (c) 1997, 2016, 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/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "gc/shared/collectedHeap.inline.hpp"
32 #include "interpreter/bytecode.hpp"
33 #include "interpreter/interpreterRuntime.hpp"
34 #include "interpreter/linkResolver.hpp"
35 #include "logging/log.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/method.hpp"
40 #include "oops/objArrayOop.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/methodHandles.hpp"
43 #include "prims/nativeLookup.hpp"
44 #include "runtime/compilationPolicy.hpp"
45 #include "runtime/fieldDescriptor.hpp"
46 #include "runtime/frame.inline.hpp"
47 #include "runtime/handles.inline.hpp"
48 #include "runtime/reflection.hpp"
49 #include "runtime/signature.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vmThread.hpp"
52
53
54 //------------------------------------------------------------------------------------------------------------------------
55 // Implementation of CallInfo
56
57
58 void CallInfo::set_static(KlassHandle resolved_klass, const methodHandle& resolved_method, TRAPS) {
59 int vtable_index = Method::nonvirtual_vtable_index;
60 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
61 }
62
63
64 void CallInfo::set_interface(KlassHandle resolved_klass,
65 KlassHandle selected_klass,
66 const methodHandle& resolved_method,
67 const methodHandle& selected_method,
68 int itable_index, TRAPS) {
69 // This is only called for interface methods. If the resolved_method
70 // comes from java/lang/Object, it can be the subject of a virtual call, so
71 // we should pick the vtable index from the resolved method.
72 // In that case, the caller must call set_virtual instead of set_interface.
73 assert(resolved_method->method_holder()->is_interface(), "");
74 assert(itable_index == resolved_method()->itable_index(), "");
75 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
76 }
77
78 void CallInfo::set_virtual(KlassHandle resolved_klass,
79 KlassHandle selected_klass,
80 const methodHandle& resolved_method,
81 const methodHandle& selected_method,
82 int vtable_index, TRAPS) {
83 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
84 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
85 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
86 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
87 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
88 }
89
90 void CallInfo::set_handle(const methodHandle& resolved_method,
91 Handle resolved_appendix,
92 Handle resolved_method_type, TRAPS) {
93 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
94 }
95
96 void CallInfo::set_handle(KlassHandle resolved_klass,
97 const methodHandle& resolved_method,
98 Handle resolved_appendix,
99 Handle resolved_method_type, TRAPS) {
100 if (resolved_method.is_null()) {
101 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
102 }
103 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
104 resolved_method->is_compiled_lambda_form(),
105 "linkMethod must return one of these");
106 int vtable_index = Method::nonvirtual_vtable_index;
107 assert(!resolved_method->has_vtable_index(), "");
108 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
109 _resolved_appendix = resolved_appendix;
110 _resolved_method_type = resolved_method_type;
111 }
112
113 void CallInfo::set_common(KlassHandle resolved_klass,
114 KlassHandle selected_klass,
115 const methodHandle& resolved_method,
116 const methodHandle& selected_method,
117 CallKind kind,
118 int index,
119 TRAPS) {
120 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
121 _resolved_klass = resolved_klass;
122 _selected_klass = selected_klass;
123 _resolved_method = resolved_method;
124 _selected_method = selected_method;
125 _call_kind = kind;
126 _call_index = index;
127 _resolved_appendix = Handle();
128 DEBUG_ONLY(verify()); // verify before making side effects
129
130 CompilationPolicy::compile_if_required(selected_method, THREAD);
131 }
132
133 // utility query for unreflecting a method
134 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
135 Klass* resolved_method_holder = resolved_method->method_holder();
136 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
137 resolved_klass = resolved_method_holder;
138 }
139 _resolved_klass = resolved_klass;
140 _selected_klass = resolved_klass;
141 _resolved_method = resolved_method;
142 _selected_method = resolved_method;
143 // classify:
144 CallKind kind = CallInfo::unknown_kind;
145 int index = resolved_method->vtable_index();
146 if (resolved_method->can_be_statically_bound()) {
147 kind = CallInfo::direct_call;
148 } else if (!resolved_method_holder->is_interface()) {
149 // Could be an Object method inherited into an interface, but still a vtable call.
150 kind = CallInfo::vtable_call;
151 } else if (!resolved_klass->is_interface()) {
152 // A default or miranda method. Compute the vtable index.
153 ResourceMark rm;
154 klassVtable* vt = resolved_klass->vtable();
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 KlassHandle 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 DEBUG_ONLY(verify());
186 }
187
188 #ifdef ASSERT
189 void CallInfo::verify() {
190 switch (call_kind()) { // the meaning and allowed value of index depends on kind
191 case CallInfo::direct_call:
192 if (_call_index == Method::nonvirtual_vtable_index) break;
193 // else fall through to check vtable index:
194 case CallInfo::vtable_call:
195 assert(resolved_klass()->verify_vtable_index(_call_index), "");
196 break;
197 case CallInfo::itable_call:
198 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
199 break;
200 case CallInfo::unknown_kind:
201 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
202 break;
203 default:
204 fatal("Unexpected call kind %d", call_kind());
205 }
206 }
207 #endif //ASSERT
208
209 #ifndef PRODUCT
210 void CallInfo::print() {
211 ResourceMark rm;
212 const char* kindstr = "unknown";
213 switch (_call_kind) {
214 case direct_call: kindstr = "direct"; break;
215 case vtable_call: kindstr = "vtable"; break;
216 case itable_call: kindstr = "itable"; break;
217 }
218 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
219 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
220 }
221 #endif
222
223 //------------------------------------------------------------------------------------------------------------------------
224 // Implementation of LinkInfo
225
226 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, methodHandle current_method, TRAPS) {
227 // resolve klass
228 Klass* result = pool->klass_ref_at(index, CHECK);
229 _resolved_klass = KlassHandle(THREAD, result);
230
231 // Get name, signature, and static klass
232 _name = pool->name_ref_at(index);
233 _signature = pool->signature_ref_at(index);
234 _tag = pool->tag_ref_at(index);
235 _current_klass = KlassHandle(THREAD, pool->pool_holder());
236 _current_method = current_method;
237
238 // Coming from the constant pool always checks access
239 _check_access = true;
240 }
241
242 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
243 // resolve klass
244 Klass* result = pool->klass_ref_at(index, CHECK);
245 _resolved_klass = KlassHandle(THREAD, result);
246
247 // Get name, signature, and static klass
248 _name = pool->name_ref_at(index);
249 _signature = pool->signature_ref_at(index);
250 _tag = pool->tag_ref_at(index);
251 _current_klass = KlassHandle(THREAD, pool->pool_holder());
252 _current_method = methodHandle();
253
254 // Coming from the constant pool always checks access
255 _check_access = true;
256 }
257
258 char* LinkInfo::method_string() const {
259 return Method::name_and_sig_as_C_string(_resolved_klass(), _name, _signature);
260 }
261
262 #ifndef PRODUCT
263 void LinkInfo::print() {
264 ResourceMark rm;
265 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
266 _resolved_klass->name()->as_C_string(),
267 _name->as_C_string(),
268 _signature->as_C_string(),
269 _current_klass.is_null() ? "(none)" : _current_klass->name()->as_C_string(),
270 _check_access ? "true" : "false");
271 }
272 #endif // PRODUCT
273 //------------------------------------------------------------------------------------------------------------------------
274 // Klass resolution
275
276 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
277 Reflection::VerifyClassAccessResults vca_result =
278 Reflection::verify_class_access(ref_klass(), sel_klass(), true);
279 if (vca_result != Reflection::ACCESS_OK) {
280 ResourceMark rm(THREAD);
281 char* msg = Reflection::verify_class_access_msg(ref_klass(), sel_klass(), vca_result);
282 if (msg == NULL) {
283 Exceptions::fthrow(
284 THREAD_AND_LOCATION,
285 vmSymbols::java_lang_IllegalAccessError(),
286 "failed to access class %s from class %s",
287 sel_klass->external_name(),
288 ref_klass->external_name());
289 } else {
290 // Use module specific message returned by verify_class_access_msg().
291 Exceptions::fthrow(
292 THREAD_AND_LOCATION,
293 vmSymbols::java_lang_IllegalAccessError(),
294 "%s", msg);
295 }
296 }
297 }
298
299 //------------------------------------------------------------------------------------------------------------------------
300 // Method resolution
301 //
302 // According to JVM spec. $5.4.3c & $5.4.3d
303
304 // Look up method in klasses, including static methods
305 // Then look up local default methods
306 methodHandle LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
307 bool checkpolymorphism,
308 bool in_imethod_resolve, TRAPS) {
309 KlassHandle klass = link_info.resolved_klass();
310 Symbol* name = link_info.name();
311 Symbol* signature = link_info.signature();
312
313 // Ignore overpasses so statics can be found during resolution
314 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
315
316 if (klass->is_array_klass()) {
317 // Only consider klass and super klass for arrays
318 return methodHandle(THREAD, result);
319 }
320
321 InstanceKlass* ik = InstanceKlass::cast(klass());
322
323 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
324 // ignore static and non-public methods of java.lang.Object,
325 // like clone, finalize, registerNatives.
326 if (in_imethod_resolve &&
327 result != NULL &&
328 ik->is_interface() &&
329 (result->is_static() || !result->is_public()) &&
330 result->method_holder() == SystemDictionary::Object_klass()) {
331 result = NULL;
332 }
333
334 // Before considering default methods, check for an overpass in the
335 // current class if a method has not been found.
336 if (result == NULL) {
337 result = ik->find_method(name, signature);
338 }
339
340 if (result == NULL) {
341 Array<Method*>* default_methods = ik->default_methods();
342 if (default_methods != NULL) {
343 result = InstanceKlass::find_method(default_methods, name, signature);
344 }
345 }
346
347 if (checkpolymorphism && result != NULL) {
348 vmIntrinsics::ID iid = result->intrinsic_id();
349 if (MethodHandles::is_signature_polymorphic(iid)) {
350 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
351 return NULL;
352 }
353 }
354 return methodHandle(THREAD, result);
355 }
356
357 // returns first instance method
358 // Looks up method in classes, then looks up local default methods
359 methodHandle LinkResolver::lookup_instance_method_in_klasses(KlassHandle klass,
360 Symbol* name,
361 Symbol* signature, TRAPS) {
362 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
363
364 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
365 Klass* super_klass = result->method_holder()->super();
366 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
367 }
368
369 if (klass->is_array_klass()) {
370 // Only consider klass and super klass for arrays
371 return methodHandle(THREAD, result);
372 }
373
374 if (result == NULL) {
375 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
376 if (default_methods != NULL) {
377 result = InstanceKlass::find_method(default_methods, name, signature);
378 assert(result == NULL || !result->is_static(), "static defaults not allowed");
379 }
380 }
381 return methodHandle(THREAD, result);
382 }
383
384 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
385 const methodHandle& resolved_method) {
386
387 int vtable_index = Method::invalid_vtable_index;
388 Symbol* name = resolved_method->name();
389 Symbol* signature = resolved_method->signature();
390 InstanceKlass* ik = InstanceKlass::cast(klass());
391
392 // First check in default method array
393 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
394 int index = InstanceKlass::find_method_index(ik->default_methods(),
395 name, signature, Klass::find_overpass,
396 Klass::find_static, Klass::find_private);
397 if (index >= 0 ) {
398 vtable_index = ik->default_vtable_indices()->at(index);
399 }
400 }
401 if (vtable_index == Method::invalid_vtable_index) {
402 // get vtable_index for miranda methods
403 ResourceMark rm;
404 klassVtable *vt = ik->vtable();
405 vtable_index = vt->index_of_miranda(name, signature);
406 }
407 return vtable_index;
408 }
409
410 methodHandle LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info, TRAPS) {
411 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass()());
412
413 // Specify 'true' in order to skip default methods when searching the
414 // interfaces. Function lookup_method_in_klasses() already looked for
415 // the method in the default methods table.
416 return methodHandle(THREAD,
417 ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(),
418 Klass::skip_defaults));
419 }
420
421 methodHandle LinkResolver::lookup_polymorphic_method(
422 const LinkInfo& link_info,
423 Handle *appendix_result_or_null,
424 Handle *method_type_result,
425 TRAPS) {
426 KlassHandle klass = link_info.resolved_klass();
427 Symbol* name = link_info.name();
428 Symbol* full_signature = link_info.signature();
429
430 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
431 if (TraceMethodHandles) {
432 ResourceMark rm(THREAD);
433 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
434 vmIntrinsics::name_at(iid), klass->external_name(),
435 name->as_C_string(), full_signature->as_C_string());
436 }
437 if ((klass() == SystemDictionary::MethodHandle_klass() ||
438 klass() == SystemDictionary::VarHandle_klass()) &&
439 iid != vmIntrinsics::_none) {
440 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
441 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
442 // Do not erase last argument type (MemberName) if it is a static linkTo method.
443 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
444 TempNewSymbol basic_signature =
445 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
446 if (TraceMethodHandles) {
447 ResourceMark rm(THREAD);
448 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
449 name->as_C_string(),
450 full_signature->as_C_string(),
451 basic_signature->as_C_string());
452 }
453 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
454 basic_signature,
455 CHECK_NULL);
456 if (result.not_null()) {
457 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
458 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
459 assert(basic_signature == result->signature(), "predict the result signature");
460 if (TraceMethodHandles) {
461 ttyLocker ttyl;
462 tty->print("lookup_polymorphic_method => intrinsic ");
463 result->print_on(tty);
464 }
465 }
466 return result;
467 } else if (iid == vmIntrinsics::_invokeGeneric
468 && THREAD->can_call_java()
469 && appendix_result_or_null != NULL) {
470 // This is a method with type-checking semantics.
471 // We will ask Java code to spin an adapter method for it.
472 if (!MethodHandles::enabled()) {
473 // Make sure the Java part of the runtime has been booted up.
474 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
475 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
476 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
477 Handle(),
478 Handle(),
479 true,
480 CHECK_NULL);
481 }
482 }
483
484 Handle appendix;
485 Handle method_type;
486 methodHandle result = SystemDictionary::find_method_handle_invoker(
487 klass,
488 name,
489 full_signature,
490 link_info.current_klass(),
491 &appendix,
492 &method_type,
493 CHECK_NULL);
494 if (TraceMethodHandles) {
495 ttyLocker ttyl;
496 tty->print("lookup_polymorphic_method => (via Java) ");
497 result->print_on(tty);
498 tty->print(" lookup_polymorphic_method => appendix = ");
499 if (appendix.is_null()) tty->print_cr("(none)");
500 else appendix->print_on(tty);
501 }
502 if (result.not_null()) {
503 #ifdef ASSERT
504 ResourceMark rm(THREAD);
505
506 TempNewSymbol basic_signature =
507 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
508 int actual_size_of_params = result->size_of_parameters();
509 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
510 // +1 for MethodHandle.this, +1 for trailing MethodType
511 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
512 if (appendix.not_null()) expected_size_of_params += 1;
513 if (actual_size_of_params != expected_size_of_params) {
514 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
515 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
516 result->print();
517 }
518 assert(actual_size_of_params == expected_size_of_params,
519 "%d != %d", actual_size_of_params, expected_size_of_params);
520 #endif //ASSERT
521
522 assert(appendix_result_or_null != NULL, "");
523 (*appendix_result_or_null) = appendix;
524 (*method_type_result) = method_type;
525 }
526 return result;
527 }
528 }
529 return NULL;
530 }
531
532 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
533 KlassHandle resolved_klass,
534 KlassHandle sel_klass,
535 const methodHandle& sel_method,
536 TRAPS) {
537
538 AccessFlags flags = sel_method->access_flags();
539
540 // Special case: arrays always override "clone". JVMS 2.15.
541 // If the resolved klass is an array class, and the declaring class
542 // is java.lang.Object and the method is "clone", set the flags
543 // to public.
544 //
545 // We'll check for the method name first, as that's most likely
546 // to be false (so we'll short-circuit out of these tests).
547 if (sel_method->name() == vmSymbols::clone_name() &&
548 sel_klass() == SystemDictionary::Object_klass() &&
549 resolved_klass->is_array_klass()) {
550 // We need to change "protected" to "public".
551 assert(flags.is_protected(), "clone not protected?");
552 jint new_flags = flags.as_int();
553 new_flags = new_flags & (~JVM_ACC_PROTECTED);
554 new_flags = new_flags | JVM_ACC_PUBLIC;
555 flags.set_flags(new_flags);
556 }
557 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
558
559 if (!Reflection::verify_field_access(ref_klass(),
560 resolved_klass(),
561 sel_klass(),
562 flags,
563 true)) {
564 ResourceMark rm(THREAD);
565 Exceptions::fthrow(
566 THREAD_AND_LOCATION,
567 vmSymbols::java_lang_IllegalAccessError(),
568 "tried to access method %s.%s%s from class %s",
569 sel_klass->external_name(),
570 sel_method->name()->as_C_string(),
571 sel_method->signature()->as_C_string(),
572 ref_klass->external_name()
573 );
574 return;
575 }
576 }
577
578 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
579 const constantPoolHandle& pool, int index, TRAPS) {
580 // This method is used only
581 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
582 // and
583 // (2) in Bytecode_invoke::static_target
584 // It appears to fail when applied to an invokeinterface call site.
585 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
586 // resolve klass
587 KlassHandle resolved_klass;
588 if (code == Bytecodes::_invokedynamic) {
589 resolved_klass = SystemDictionary::MethodHandle_klass();
590 Symbol* method_name = vmSymbols::invoke_name();
591 Symbol* method_signature = pool->signature_ref_at(index);
592 KlassHandle current_klass(THREAD, pool->pool_holder());
593 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
594 return resolve_method(link_info, code, THREAD);
595 }
596
597 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
598 resolved_klass = link_info.resolved_klass();
599
600 if (pool->has_preresolution()
601 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
602 MethodHandles::is_signature_polymorphic_name(resolved_klass(), link_info.name()))) {
603 Method* result = ConstantPool::method_at_if_loaded(pool, index);
604 if (result != NULL) {
605 return methodHandle(THREAD, result);
606 }
607 }
608
609 if (code == Bytecodes::_invokeinterface) {
610 return resolve_interface_method(link_info, code, THREAD);
611 } else if (code == Bytecodes::_invokevirtual) {
612 return resolve_method(link_info, code, THREAD);
613 } else if (!resolved_klass->is_interface()) {
614 return resolve_method(link_info, code, THREAD);
615 } else {
616 return resolve_interface_method(link_info, code, THREAD);
617 }
618 }
619
620 // Check and print a loader constraint violation message for method or interface method
621 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
622 const methodHandle& resolved_method,
623 const char* method_type, TRAPS) {
624 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
625 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
626
627 ResourceMark rm(THREAD);
628 Symbol* failed_type_symbol =
629 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
630 resolved_loader, true, CHECK);
631 if (failed_type_symbol != NULL) {
632 const char* msg = "loader constraint violation: when resolving %s"
633 " \"%s\" the class loader (instance of %s) of the current class, %s,"
634 " and the class loader (instance of %s) for the method's defining class, %s, have"
635 " different Class objects for the type %s used in the signature";
636 char* sig = link_info.method_string();
637 const char* loader1_name = SystemDictionary::loader_name(current_loader());
638 char* current = link_info.current_klass()->name()->as_C_string();
639 const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
640 char* target = resolved_method->method_holder()->name()->as_C_string();
641 char* failed_type_name = failed_type_symbol->as_C_string();
642 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
643 strlen(current) + strlen(loader2_name) + strlen(target) +
644 strlen(failed_type_name) + strlen(method_type) + 1;
645 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
646 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
647 target, failed_type_name);
648 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
649 }
650 }
651
652 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
653 KlassHandle current_klass,
654 KlassHandle sel_klass, TRAPS) {
655 Handle ref_loader(THREAD, current_klass->class_loader());
656 Handle sel_loader(THREAD, sel_klass->class_loader());
657
658 ResourceMark rm(THREAD); // needed for check_signature_loaders
659 Symbol* failed_type_symbol =
660 SystemDictionary::check_signature_loaders(sig,
661 ref_loader, sel_loader,
662 false,
663 CHECK);
664 if (failed_type_symbol != NULL) {
665 const char* msg = "loader constraint violation: when resolving field"
666 " \"%s\" the class loader (instance of %s) of the referring class, "
667 "%s, and the class loader (instance of %s) for the field's resolved "
668 "type, %s, have different Class objects for that type";
669 char* field_name = field->as_C_string();
670 const char* loader1_name = SystemDictionary::loader_name(ref_loader());
671 char* sel = sel_klass->name()->as_C_string();
672 const char* loader2_name = SystemDictionary::loader_name(sel_loader());
673 char* failed_type_name = failed_type_symbol->as_C_string();
674 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
675 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
676 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
677 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
678 failed_type_name);
679 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
680 }
681 }
682
683 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
684 Bytecodes::Code code, TRAPS) {
685
686 Handle nested_exception;
687 KlassHandle resolved_klass = link_info.resolved_klass();
688
689 // 1. For invokevirtual, cannot call an interface method
690 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
691 ResourceMark rm(THREAD);
692 char buf[200];
693 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
694 resolved_klass()->external_name());
695 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
696 }
697
698 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
699 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
700 ResourceMark rm(THREAD);
701 char buf[200];
702 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string());
703 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
704 }
705
706
707 // 3. lookup method in resolved klass and its super klasses
708 methodHandle resolved_method = lookup_method_in_klasses(link_info, true, false, CHECK_NULL);
709
710 // 4. lookup method in all the interfaces implemented by the resolved klass
711 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
712 resolved_method = lookup_method_in_interfaces(link_info, CHECK_NULL);
713
714 if (resolved_method.is_null()) {
715 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
716 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
717 if (HAS_PENDING_EXCEPTION) {
718 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
719 CLEAR_PENDING_EXCEPTION;
720 }
721 }
722 }
723
724 // 5. method lookup failed
725 if (resolved_method.is_null()) {
726 ResourceMark rm(THREAD);
727 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
728 Method::name_and_sig_as_C_string(resolved_klass(),
729 link_info.name(),
730 link_info.signature()),
731 nested_exception, NULL);
732 }
733
734 // 6. access checks, access checking may be turned off when calling from within the VM.
735 KlassHandle current_klass = link_info.current_klass();
736 if (link_info.check_access()) {
737 assert(current_klass.not_null() , "current_klass should not be null");
738
739 // check if method can be accessed by the referring class
740 check_method_accessability(current_klass,
741 resolved_klass,
742 KlassHandle(THREAD, resolved_method->method_holder()),
743 resolved_method,
744 CHECK_NULL);
745
746 // check loader constraints
747 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
748 }
749
750 return resolved_method;
751 }
752
753 static void trace_method_resolution(const char* prefix,
754 KlassHandle klass,
755 KlassHandle resolved_klass,
756 const methodHandle& method,
757 bool logitables,
758 int index = -1) {
759 #ifndef PRODUCT
760 ResourceMark rm;
761 outputStream* st;
762 if (logitables) {
763 st = Log(itables)::trace_stream();
764 } else {
765 st = Log(vtables)::trace_stream();
766 }
767 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
768 prefix,
769 (klass.is_null() ? "<NULL>" : klass->internal_name()),
770 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
771 Method::name_and_sig_as_C_string(resolved_klass(),
772 method->name(),
773 method->signature()),
774 method->method_holder()->internal_name());
775 method->print_linkage_flags(st);
776 if (index != -1) {
777 st->print("vtable_index:%d", index);
778 }
779 st->cr();
780 #endif // PRODUCT
781 }
782
783 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
784 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
785
786 KlassHandle resolved_klass = link_info.resolved_klass();
787
788 // check if klass is interface
789 if (!resolved_klass->is_interface()) {
790 ResourceMark rm(THREAD);
791 char buf[200];
792 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
793 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
794 }
795
796 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
797 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
798 ResourceMark rm(THREAD);
799 char buf[200];
800 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string());
801 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
802 }
803
804 // lookup method in this interface or its super, java.lang.Object
805 // JDK8: also look for static methods
806 methodHandle resolved_method = lookup_method_in_klasses(link_info, false, true, CHECK_NULL);
807
808 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
809 // lookup method in all the super-interfaces
810 resolved_method = lookup_method_in_interfaces(link_info, CHECK_NULL);
811 }
812
813 if (resolved_method.is_null()) {
814 // no method found
815 ResourceMark rm(THREAD);
816 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
817 Method::name_and_sig_as_C_string(resolved_klass(),
818 link_info.name(),
819 link_info.signature()));
820 }
821
822 if (link_info.check_access()) {
823 // JDK8 adds non-public interface methods, and accessability check requirement
824 KlassHandle current_klass = link_info.current_klass();
825
826 assert(current_klass.not_null() , "current_klass should not be null");
827
828 // check if method can be accessed by the referring class
829 check_method_accessability(current_klass,
830 resolved_klass,
831 KlassHandle(THREAD, resolved_method->method_holder()),
832 resolved_method,
833 CHECK_NULL);
834
835 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
836 }
837
838 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
839 ResourceMark rm(THREAD);
840 char buf[200];
841 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
842 Method::name_and_sig_as_C_string(resolved_klass(),
843 resolved_method->name(), resolved_method->signature()));
844 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
845 }
846
847 if (code == Bytecodes::_invokeinterface && resolved_method->is_private()) {
848 ResourceMark rm(THREAD);
849 char buf[200];
850
851 KlassHandle current_klass = link_info.current_klass();
852 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s, caller-class:%s",
853 Method::name_and_sig_as_C_string(resolved_klass(),
854 resolved_method->name(),
855 resolved_method->signature()),
856 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
857 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
858 }
859
860 if (log_develop_is_enabled(Trace, itables)) {
861 trace_method_resolution("invokeinterface resolved method: caller-class",
862 link_info.current_klass(), resolved_klass,
863 resolved_method, true);
864 }
865
866 return resolved_method;
867 }
868
869 //------------------------------------------------------------------------------------------------------------------------
870 // Field resolution
871
872 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
873 KlassHandle resolved_klass,
874 KlassHandle sel_klass,
875 const fieldDescriptor& fd,
876 TRAPS) {
877 if (!Reflection::verify_field_access(ref_klass(),
878 resolved_klass(),
879 sel_klass(),
880 fd.access_flags(),
881 true)) {
882 ResourceMark rm(THREAD);
883 Exceptions::fthrow(
884 THREAD_AND_LOCATION,
885 vmSymbols::java_lang_IllegalAccessError(),
886 "tried to access field %s.%s from class %s",
887 sel_klass->external_name(),
888 fd.name()->as_C_string(),
889 ref_klass->external_name()
890 );
891 return;
892 }
893 }
894
895 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
896 LinkInfo link_info(pool, index, method, CHECK);
897 resolve_field(fd, link_info, byte, true, CHECK);
898 }
899
900 void LinkResolver::resolve_field(fieldDescriptor& fd,
901 const LinkInfo& link_info,
902 Bytecodes::Code byte, bool initialize_class,
903 TRAPS) {
904 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
905 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
906 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
907 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
908
909 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
910 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
911 // Check if there's a resolved klass containing the field
912 KlassHandle resolved_klass = link_info.resolved_klass();
913 Symbol* field = link_info.name();
914 Symbol* sig = link_info.signature();
915
916 if (resolved_klass.is_null()) {
917 ResourceMark rm(THREAD);
918 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
919 }
920
921 // Resolve instance field
922 KlassHandle sel_klass(THREAD, resolved_klass->find_field(field, sig, &fd));
923 // check if field exists; i.e., if a klass containing the field def has been selected
924 if (sel_klass.is_null()) {
925 ResourceMark rm(THREAD);
926 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
927 }
928
929 if (!link_info.check_access())
930 // Access checking may be turned off when calling from within the VM.
931 return;
932
933 // check access
934 KlassHandle current_klass = link_info.current_klass();
935 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
936
937 // check for errors
938 if (is_static != fd.is_static()) {
939 ResourceMark rm(THREAD);
940 char msg[200];
941 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
942 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
943 }
944
945 // A final field can be modified only
946 // (1) by methods declared in the class declaring the field and
947 // (2) by the <clinit> method (in case of a static field)
948 // or by the <init> method (in case of an instance field).
949 if (is_put && fd.access_flags().is_final()) {
950 ResourceMark rm(THREAD);
951 stringStream ss;
952
953 if (sel_klass() != current_klass()) {
954 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
955 is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string(),
956 current_klass()->external_name());
957 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
958 }
959
960 if (fd.constants()->pool_holder()->major_version() >= 53) {
961 methodHandle m = link_info.current_method();
962 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
963 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
964 fd.is_static() &&
965 !m()->is_static_initializer());
966 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
967 !fd.is_static() &&
968 !m->is_object_initializer());
969
970 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
971 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
972 is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string(),
973 m()->name()->as_C_string(),
974 is_static ? "<clinit>" : "<init>");
975 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
976 }
977 }
978 }
979
980 // initialize resolved_klass if necessary
981 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
982 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
983 //
984 // note 2: we don't want to force initialization if we are just checking
985 // if the field access is legal; e.g., during compilation
986 if (is_static && initialize_class) {
987 sel_klass->initialize(CHECK);
988 }
989
990 if (sel_klass() != current_klass()) {
991 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
992 }
993
994 // return information. note that the klass is set to the actual klass containing the
995 // field, otherwise access of static fields in superclasses will not work.
996 }
997
998
999 //------------------------------------------------------------------------------------------------------------------------
1000 // Invoke resolution
1001 //
1002 // Naming conventions:
1003 //
1004 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1005 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1006 // resolved_klass the specified klass (i.e., specified via constant pool index)
1007 // recv_klass the receiver klass
1008
1009
1010 void LinkResolver::resolve_static_call(CallInfo& result,
1011 const LinkInfo& link_info,
1012 bool initialize_class, TRAPS) {
1013 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
1014
1015 // The resolved class can change as a result of this resolution.
1016 KlassHandle resolved_klass(THREAD, resolved_method->method_holder());
1017
1018 // Initialize klass (this should only happen if everything is ok)
1019 if (initialize_class && resolved_klass->should_be_initialized()) {
1020 resolved_klass->initialize(CHECK);
1021 // Use updated LinkInfo to reresolve with resolved method holder
1022 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1023 link_info.current_klass(),
1024 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1025 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1026 }
1027
1028 // setup result
1029 result.set_static(resolved_klass, resolved_method, CHECK);
1030 }
1031
1032 // throws linktime exceptions
1033 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1034
1035 KlassHandle resolved_klass = link_info.resolved_klass();
1036 methodHandle resolved_method;
1037 if (!resolved_klass->is_interface()) {
1038 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1039 } else {
1040 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1041 }
1042 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1043
1044 // check if static
1045 if (!resolved_method->is_static()) {
1046 ResourceMark rm(THREAD);
1047 char buf[200];
1048 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1049 resolved_method->name(),
1050 resolved_method->signature()));
1051 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1052 }
1053 return resolved_method;
1054 }
1055
1056
1057 void LinkResolver::resolve_special_call(CallInfo& result,
1058 const LinkInfo& link_info,
1059 TRAPS) {
1060 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
1061 runtime_resolve_special_method(result, resolved_method,
1062 link_info.resolved_klass(),
1063 link_info.current_klass(),
1064 link_info.check_access(), CHECK);
1065 }
1066
1067 // throws linktime exceptions
1068 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
1069 TRAPS) {
1070
1071 // Invokespecial is called for multiple special reasons:
1072 // <init>
1073 // local private method invocation, for classes and interfaces
1074 // superclass.method, which can also resolve to a default method
1075 // and the selected method is recalculated relative to the direct superclass
1076 // superinterface.method, which explicitly does not check shadowing
1077 KlassHandle resolved_klass = link_info.resolved_klass();
1078 methodHandle resolved_method;
1079
1080 if (!resolved_klass->is_interface()) {
1081 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1082 } else {
1083 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1084 }
1085
1086 // check if method name is <init>, that it is found in same klass as static type
1087 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1088 resolved_method->method_holder() != resolved_klass()) {
1089 ResourceMark rm(THREAD);
1090 Exceptions::fthrow(
1091 THREAD_AND_LOCATION,
1092 vmSymbols::java_lang_NoSuchMethodError(),
1093 "%s: method %s%s not found",
1094 resolved_klass->external_name(),
1095 resolved_method->name()->as_C_string(),
1096 resolved_method->signature()->as_C_string()
1097 );
1098 return NULL;
1099 }
1100
1101 // check if invokespecial's interface method reference is in an indirect superinterface
1102 KlassHandle current_klass = link_info.current_klass();
1103 if (!current_klass.is_null() && resolved_klass->is_interface()) {
1104 Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ?
1105 current_klass() :
1106 InstanceKlass::cast(current_klass())->host_klass();
1107 // Disable verification for the dynamically-generated reflection bytecodes.
1108 bool is_reflect = klass_to_check->is_subclass_of(
1109 SystemDictionary::reflect_MagicAccessorImpl_klass());
1110
1111 if (!is_reflect &&
1112 !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) {
1113 ResourceMark rm(THREAD);
1114 char buf[200];
1115 jio_snprintf(buf, sizeof(buf),
1116 "Interface method reference: %s, is in an indirect superinterface of %s",
1117 Method::name_and_sig_as_C_string(resolved_klass(),
1118 resolved_method->name(),
1119 resolved_method->signature()),
1120 current_klass->external_name());
1121 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1122 }
1123 }
1124
1125 // check if not static
1126 if (resolved_method->is_static()) {
1127 ResourceMark rm(THREAD);
1128 char buf[200];
1129 jio_snprintf(buf, sizeof(buf),
1130 "Expecting non-static method %s",
1131 Method::name_and_sig_as_C_string(resolved_klass(),
1132 resolved_method->name(),
1133 resolved_method->signature()));
1134 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1135 }
1136
1137 if (log_develop_is_enabled(Trace, itables)) {
1138 trace_method_resolution("invokespecial resolved method: caller-class:",
1139 current_klass, resolved_klass, resolved_method, true);
1140 }
1141
1142 return resolved_method;
1143 }
1144
1145 // throws runtime exceptions
1146 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1147 const methodHandle& resolved_method,
1148 KlassHandle resolved_klass,
1149 KlassHandle current_klass,
1150 bool check_access, TRAPS) {
1151
1152 // resolved method is selected method unless we have an old-style lookup
1153 // for a superclass method
1154 // Invokespecial for a superinterface, resolved method is selected method,
1155 // no checks for shadowing
1156 methodHandle sel_method(THREAD, resolved_method());
1157
1158 // check if this is an old-style super call and do a new lookup if so
1159 { KlassHandle method_klass = KlassHandle(THREAD,
1160 resolved_method->method_holder());
1161
1162 if (check_access &&
1163 // a) check if ACC_SUPER flag is set for the current class
1164 (current_klass->is_super() || !AllowNonVirtualCalls) &&
1165 // b) check if the class of the resolved_klass is a superclass
1166 // (not supertype in order to exclude interface classes) of the current class.
1167 // This check is not performed for super.invoke for interface methods
1168 // in super interfaces.
1169 current_klass->is_subclass_of(resolved_klass()) &&
1170 current_klass() != resolved_klass() &&
1171 // c) check if the method is not <init>
1172 resolved_method->name() != vmSymbols::object_initializer_name()) {
1173 // Lookup super method
1174 KlassHandle super_klass(THREAD, current_klass->super());
1175 sel_method = lookup_instance_method_in_klasses(super_klass,
1176 resolved_method->name(),
1177 resolved_method->signature(), CHECK);
1178 // check if found
1179 if (sel_method.is_null()) {
1180 ResourceMark rm(THREAD);
1181 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1182 Method::name_and_sig_as_C_string(resolved_klass(),
1183 resolved_method->name(),
1184 resolved_method->signature()));
1185 }
1186 }
1187 }
1188
1189 // check if not static
1190 if (sel_method->is_static()) {
1191 ResourceMark rm(THREAD);
1192 char buf[200];
1193 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1194 resolved_method->name(),
1195 resolved_method->signature()));
1196 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1197 }
1198
1199 // check if abstract
1200 if (sel_method->is_abstract()) {
1201 ResourceMark rm(THREAD);
1202 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1203 Method::name_and_sig_as_C_string(resolved_klass(),
1204 sel_method->name(),
1205 sel_method->signature()));
1206 }
1207
1208 if (log_develop_is_enabled(Trace, itables)) {
1209 trace_method_resolution("invokespecial selected method: resolved-class:",
1210 resolved_klass, resolved_klass, sel_method, true);
1211 }
1212
1213 // setup result
1214 result.set_static(resolved_klass, sel_method, CHECK);
1215 }
1216
1217 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass,
1218 const LinkInfo& link_info,
1219 bool check_null_and_abstract, TRAPS) {
1220 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1221 runtime_resolve_virtual_method(result, resolved_method,
1222 link_info.resolved_klass(),
1223 recv, receiver_klass,
1224 check_null_and_abstract, CHECK);
1225 }
1226
1227 // throws linktime exceptions
1228 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1229 TRAPS) {
1230 // normal method resolution
1231 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1232
1233 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1234 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1235
1236 // check if private interface method
1237 KlassHandle resolved_klass = link_info.resolved_klass();
1238 KlassHandle current_klass = link_info.current_klass();
1239
1240 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1241 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1242 ResourceMark rm(THREAD);
1243 char buf[200];
1244 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1245 Method::name_and_sig_as_C_string(resolved_klass(),
1246 resolved_method->name(),
1247 resolved_method->signature()),
1248 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
1249 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1250 }
1251
1252 // check if not static
1253 if (resolved_method->is_static()) {
1254 ResourceMark rm(THREAD);
1255 char buf[200];
1256 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1257 resolved_method->name(),
1258 resolved_method->signature()));
1259 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1260 }
1261
1262 if (log_develop_is_enabled(Trace, vtables)) {
1263 trace_method_resolution("invokevirtual resolved method: caller-class:",
1264 current_klass, resolved_klass, resolved_method, false);
1265 }
1266
1267 return resolved_method;
1268 }
1269
1270 // throws runtime exceptions
1271 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1272 const methodHandle& resolved_method,
1273 KlassHandle resolved_klass,
1274 Handle recv,
1275 KlassHandle recv_klass,
1276 bool check_null_and_abstract,
1277 TRAPS) {
1278
1279 // setup default return values
1280 int vtable_index = Method::invalid_vtable_index;
1281 methodHandle selected_method;
1282
1283 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
1284
1285 // runtime method resolution
1286 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1287 THROW(vmSymbols::java_lang_NullPointerException());
1288 }
1289
1290 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1291 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1292 // a missing receiver might result in a bogus lookup.
1293 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1294
1295 // do lookup based on receiver klass using the vtable index
1296 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1297 vtable_index = vtable_index_of_interface_method(resolved_klass,
1298 resolved_method);
1299 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1300
1301 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1302 } else {
1303 // at this point we are sure that resolved_method is virtual and not
1304 // a default or miranda method; therefore, it must have a valid vtable index.
1305 assert(!resolved_method->has_itable_index(), "");
1306 vtable_index = resolved_method->vtable_index();
1307 // We could get a negative vtable_index for final methods,
1308 // because as an optimization they are they are never put in the vtable,
1309 // unless they override an existing method.
1310 // If we do get a negative, it means the resolved method is the the selected
1311 // method, and it can never be changed by an override.
1312 if (vtable_index == Method::nonvirtual_vtable_index) {
1313 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1314 selected_method = resolved_method;
1315 } else {
1316 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1317 }
1318 }
1319
1320 // check if method exists
1321 if (selected_method.is_null()) {
1322 ResourceMark rm(THREAD);
1323 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1324 Method::name_and_sig_as_C_string(resolved_klass(),
1325 resolved_method->name(),
1326 resolved_method->signature()));
1327 }
1328
1329 // check if abstract
1330 if (check_null_and_abstract && selected_method->is_abstract()) {
1331 ResourceMark rm(THREAD);
1332 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1333 Method::name_and_sig_as_C_string(resolved_klass(),
1334 selected_method->name(),
1335 selected_method->signature()));
1336 }
1337
1338 if (log_develop_is_enabled(Trace, vtables)) {
1339 trace_method_resolution("invokevirtual selected method: receiver-class:",
1340 recv_klass, resolved_klass, selected_method,
1341 false, vtable_index);
1342 }
1343 // setup result
1344 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1345 }
1346
1347 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass,
1348 const LinkInfo& link_info,
1349 bool check_null_and_abstract, TRAPS) {
1350 // throws linktime exceptions
1351 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1352 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1353 recv, recv_klass, check_null_and_abstract, CHECK);
1354 }
1355
1356 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1357 TRAPS) {
1358 // normal interface method resolution
1359 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1360 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1361 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1362
1363 return resolved_method;
1364 }
1365
1366 // throws runtime exceptions
1367 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1368 const methodHandle& resolved_method,
1369 KlassHandle resolved_klass,
1370 Handle recv,
1371 KlassHandle recv_klass,
1372 bool check_null_and_abstract, TRAPS) {
1373 // check if receiver exists
1374 if (check_null_and_abstract && recv.is_null()) {
1375 THROW(vmSymbols::java_lang_NullPointerException());
1376 }
1377
1378 // check if receiver klass implements the resolved interface
1379 if (!recv_klass->is_subtype_of(resolved_klass())) {
1380 ResourceMark rm(THREAD);
1381 char buf[200];
1382 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1383 recv_klass()->external_name(),
1384 resolved_klass()->external_name());
1385 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1386 }
1387
1388 // do lookup based on receiver klass
1389 // This search must match the linktime preparation search for itable initialization
1390 // to correctly enforce loader constraints for interface method inheritance
1391 methodHandle sel_method = lookup_instance_method_in_klasses(recv_klass,
1392 resolved_method->name(),
1393 resolved_method->signature(), CHECK);
1394 if (sel_method.is_null() && !check_null_and_abstract) {
1395 // In theory this is a harmless placeholder value, but
1396 // in practice leaving in null affects the nsk default method tests.
1397 // This needs further study.
1398 sel_method = resolved_method;
1399 }
1400 // check if method exists
1401 if (sel_method.is_null()) {
1402 ResourceMark rm(THREAD);
1403 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1404 Method::name_and_sig_as_C_string(recv_klass(),
1405 resolved_method->name(),
1406 resolved_method->signature()));
1407 }
1408 // check access
1409 // Throw Illegal Access Error if sel_method is not public.
1410 if (!sel_method->is_public()) {
1411 ResourceMark rm(THREAD);
1412 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1413 Method::name_and_sig_as_C_string(recv_klass(),
1414 sel_method->name(),
1415 sel_method->signature()));
1416 }
1417 // check if abstract
1418 if (check_null_and_abstract && sel_method->is_abstract()) {
1419 ResourceMark rm(THREAD);
1420 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1421 Method::name_and_sig_as_C_string(recv_klass(),
1422 sel_method->name(),
1423 sel_method->signature()));
1424 }
1425
1426 if (log_develop_is_enabled(Trace, itables)) {
1427 trace_method_resolution("invokeinterface selected method: receiver-class",
1428 recv_klass, resolved_klass, sel_method, true);
1429 }
1430 // setup result
1431 if (!resolved_method->has_itable_index()) {
1432 int vtable_index = resolved_method->vtable_index();
1433 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1434 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1435 } else {
1436 int itable_index = resolved_method()->itable_index();
1437 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1438 }
1439 }
1440
1441
1442 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1443 const LinkInfo& link_info) {
1444 EXCEPTION_MARK;
1445 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1446 if (HAS_PENDING_EXCEPTION) {
1447 CLEAR_PENDING_EXCEPTION;
1448 return methodHandle();
1449 } else {
1450 return method_result;
1451 }
1452 }
1453
1454 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1455 const LinkInfo& link_info) {
1456 EXCEPTION_MARK;
1457 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1458 if (HAS_PENDING_EXCEPTION) {
1459 CLEAR_PENDING_EXCEPTION;
1460 return methodHandle();
1461 } else {
1462 return method_result;
1463 }
1464 }
1465
1466 methodHandle LinkResolver::resolve_virtual_call_or_null(
1467 KlassHandle receiver_klass,
1468 const LinkInfo& link_info) {
1469 EXCEPTION_MARK;
1470 CallInfo info;
1471 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1472 if (HAS_PENDING_EXCEPTION) {
1473 CLEAR_PENDING_EXCEPTION;
1474 return methodHandle();
1475 }
1476 return info.selected_method();
1477 }
1478
1479 methodHandle LinkResolver::resolve_interface_call_or_null(
1480 KlassHandle receiver_klass,
1481 const LinkInfo& link_info) {
1482 EXCEPTION_MARK;
1483 CallInfo info;
1484 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1485 if (HAS_PENDING_EXCEPTION) {
1486 CLEAR_PENDING_EXCEPTION;
1487 return methodHandle();
1488 }
1489 return info.selected_method();
1490 }
1491
1492 int LinkResolver::resolve_virtual_vtable_index(KlassHandle receiver_klass,
1493 const LinkInfo& link_info) {
1494 EXCEPTION_MARK;
1495 CallInfo info;
1496 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1497 /*check_null_or_abstract*/false, THREAD);
1498 if (HAS_PENDING_EXCEPTION) {
1499 CLEAR_PENDING_EXCEPTION;
1500 return Method::invalid_vtable_index;
1501 }
1502 return info.vtable_index();
1503 }
1504
1505 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1506 EXCEPTION_MARK;
1507 CallInfo info;
1508 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1509 if (HAS_PENDING_EXCEPTION) {
1510 CLEAR_PENDING_EXCEPTION;
1511 return methodHandle();
1512 }
1513 return info.selected_method();
1514 }
1515
1516 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1517 EXCEPTION_MARK;
1518 CallInfo info;
1519 resolve_special_call(info, link_info, THREAD);
1520 if (HAS_PENDING_EXCEPTION) {
1521 CLEAR_PENDING_EXCEPTION;
1522 return methodHandle();
1523 }
1524 return info.selected_method();
1525 }
1526
1527
1528
1529 //------------------------------------------------------------------------------------------------------------------------
1530 // ConstantPool entries
1531
1532 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1533 switch (byte) {
1534 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1535 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1536 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1537 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1538 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1539 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1540 }
1541 return;
1542 }
1543
1544 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1545 const methodHandle& attached_method,
1546 Bytecodes::Code byte, TRAPS) {
1547 KlassHandle defc = attached_method->method_holder();
1548 Symbol* name = attached_method->name();
1549 Symbol* type = attached_method->signature();
1550 LinkInfo link_info(defc, name, type);
1551 switch(byte) {
1552 case Bytecodes::_invokevirtual:
1553 resolve_virtual_call(result, recv, recv->klass(), link_info,
1554 /*check_null_and_abstract=*/true, CHECK);
1555 break;
1556 case Bytecodes::_invokeinterface:
1557 resolve_interface_call(result, recv, recv->klass(), link_info,
1558 /*check_null_and_abstract=*/true, CHECK);
1559 break;
1560 case Bytecodes::_invokestatic:
1561 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1562 break;
1563 case Bytecodes::_invokespecial:
1564 resolve_special_call(result, link_info, CHECK);
1565 break;
1566 default:
1567 fatal("bad call: %s", Bytecodes::name(byte));
1568 }
1569 }
1570
1571 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1572 LinkInfo link_info(pool, index, CHECK);
1573 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1574 }
1575
1576
1577 void LinkResolver::resolve_invokespecial(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1578 LinkInfo link_info(pool, index, CHECK);
1579 resolve_special_call(result, link_info, CHECK);
1580 }
1581
1582
1583 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1584 const constantPoolHandle& pool, int index,
1585 TRAPS) {
1586
1587 LinkInfo link_info(pool, index, CHECK);
1588 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1589 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1590 }
1591
1592
1593 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1594 LinkInfo link_info(pool, index, CHECK);
1595 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1596 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1597 }
1598
1599
1600 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1601 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1602 LinkInfo link_info(pool, index, CHECK);
1603 if (TraceMethodHandles) {
1604 ResourceMark rm(THREAD);
1605 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1606 link_info.signature()->as_C_string());
1607 }
1608 resolve_handle_call(result, link_info, CHECK);
1609 }
1610
1611 void LinkResolver::resolve_handle_call(CallInfo& result,
1612 const LinkInfo& link_info,
1613 TRAPS) {
1614 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1615 KlassHandle resolved_klass = link_info.resolved_klass();
1616 assert(resolved_klass() == SystemDictionary::MethodHandle_klass() ||
1617 resolved_klass() == SystemDictionary::VarHandle_klass(), "");
1618 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1619 Handle resolved_appendix;
1620 Handle resolved_method_type;
1621 methodHandle resolved_method = lookup_polymorphic_method(link_info,
1622 &resolved_appendix, &resolved_method_type, CHECK);
1623 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
1624 }
1625
1626 static void wrap_invokedynamic_exception(TRAPS) {
1627 if (HAS_PENDING_EXCEPTION) {
1628 if (TraceMethodHandles) {
1629 tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1630 PENDING_EXCEPTION->print();
1631 }
1632 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1633 // throw these guys, since they are already wrapped
1634 return;
1635 }
1636 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1637 // intercept only LinkageErrors which might have failed to wrap
1638 return;
1639 }
1640 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1641 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1642 CLEAR_PENDING_EXCEPTION;
1643 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1644 }
1645 }
1646
1647 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1648 Symbol* method_name = pool->name_ref_at(index);
1649 Symbol* method_signature = pool->signature_ref_at(index);
1650 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1651
1652 // Resolve the bootstrap specifier (BSM + optional arguments).
1653 Handle bootstrap_specifier;
1654 // Check if CallSite has been bound already:
1655 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1656 if (cpce->is_f1_null()) {
1657 int pool_index = cpce->constant_pool_index();
1658 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1659 wrap_invokedynamic_exception(CHECK);
1660 assert(bsm_info != NULL, "");
1661 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1662 bootstrap_specifier = Handle(THREAD, bsm_info);
1663 }
1664 if (!cpce->is_f1_null()) {
1665 methodHandle method( THREAD, cpce->f1_as_method());
1666 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1667 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1668 result.set_handle(method, appendix, method_type, THREAD);
1669 wrap_invokedynamic_exception(CHECK);
1670 return;
1671 }
1672
1673 if (TraceMethodHandles) {
1674 ResourceMark rm(THREAD);
1675 tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
1676 ConstantPool::decode_invokedynamic_index(index),
1677 method_name->as_C_string(), method_signature->as_C_string(),
1678 current_klass->name()->as_C_string());
1679 tty->print(" BSM info: "); bootstrap_specifier->print();
1680 }
1681
1682 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1683 }
1684
1685 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1686 Handle bootstrap_specifier,
1687 Symbol* method_name, Symbol* method_signature,
1688 KlassHandle current_klass,
1689 TRAPS) {
1690 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1691 // The appendix argument is likely to be a freshly-created CallSite.
1692 Handle resolved_appendix;
1693 Handle resolved_method_type;
1694 methodHandle resolved_method =
1695 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1696 bootstrap_specifier,
1697 method_name, method_signature,
1698 &resolved_appendix,
1699 &resolved_method_type,
1700 THREAD);
1701 wrap_invokedynamic_exception(CHECK);
1702 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1703 wrap_invokedynamic_exception(CHECK);
1704 }