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