1 /*
2 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/defaultMethods.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/resolutionErrors.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "compiler/compilationPolicy.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "gc/shared/collectedHeap.inline.hpp"
36 #include "interpreter/bootstrapInfo.hpp"
37 #include "interpreter/bytecode.hpp"
38 #include "interpreter/interpreterRuntime.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "logging/log.hpp"
41 #include "logging/logStream.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "oops/constantPool.hpp"
44 #include "oops/cpCache.inline.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/method.hpp"
47 #include "oops/objArrayKlass.hpp"
48 #include "oops/objArrayOop.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "prims/methodHandles.hpp"
51 #include "prims/nativeLookup.hpp"
52 #include "runtime/fieldDescriptor.inline.hpp"
53 #include "runtime/frame.inline.hpp"
54 #include "runtime/handles.inline.hpp"
55 #include "runtime/reflection.hpp"
56 #include "runtime/safepointVerifiers.hpp"
57 #include "runtime/signature.hpp"
58 #include "runtime/thread.inline.hpp"
59 #include "runtime/vmThread.hpp"
60
61 //------------------------------------------------------------------------------------------------------------------------
62 // Implementation of CallInfo
63
64
65 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
66 int vtable_index = Method::nonvirtual_vtable_index;
67 set_common(resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
68 }
69
70
71 void CallInfo::set_interface(Klass* resolved_klass,
72 const methodHandle& resolved_method,
73 const methodHandle& selected_method,
74 int itable_index, TRAPS) {
75 // This is only called for interface methods. If the resolved_method
76 // comes from java/lang/Object, it can be the subject of a virtual call, so
77 // we should pick the vtable index from the resolved method.
78 // In that case, the caller must call set_virtual instead of set_interface.
79 assert(resolved_method->method_holder()->is_interface(), "");
80 assert(itable_index == resolved_method()->itable_index(), "");
81 set_common(resolved_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
82 }
83
84 void CallInfo::set_virtual(Klass* resolved_klass,
85 const methodHandle& resolved_method,
86 const methodHandle& selected_method,
87 int vtable_index, TRAPS) {
88 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
89 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
90 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
91 set_common(resolved_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
92 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
93 }
94
95 void CallInfo::set_handle(const methodHandle& resolved_method,
96 Handle resolved_appendix, TRAPS) {
97 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, CHECK);
98 }
99
100 void CallInfo::set_handle(Klass* resolved_klass,
101 const methodHandle& resolved_method,
102 Handle resolved_appendix, TRAPS) {
103 guarantee(resolved_method.not_null(), "resolved method is null");
104 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
105 resolved_method->is_compiled_lambda_form(),
106 "linkMethod must return one of these");
107 int vtable_index = Method::nonvirtual_vtable_index;
108 assert(!resolved_method->has_vtable_index(), "");
109 set_common(resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
110 _resolved_appendix = resolved_appendix;
111 }
112
113 void CallInfo::set_common(Klass* resolved_klass,
114 const methodHandle& resolved_method,
115 const methodHandle& selected_method,
116 CallKind kind,
117 int index,
118 TRAPS) {
119 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
120 _resolved_klass = resolved_klass;
121 _resolved_method = resolved_method;
122 _selected_method = selected_method;
123 _call_kind = kind;
124 _call_index = index;
125 _resolved_appendix = Handle();
126 DEBUG_ONLY(verify()); // verify before making side effects
127
128 CompilationPolicy::compile_if_required(selected_method, THREAD);
129 }
130
131 // utility query for unreflecting a method
132 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
133 Klass* resolved_method_holder = resolved_method->method_holder();
134 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
135 resolved_klass = resolved_method_holder;
136 }
137 _resolved_klass = resolved_klass;
138 _resolved_method = methodHandle(THREAD, resolved_method);
139 _selected_method = methodHandle(THREAD, resolved_method);
140 // classify:
141 CallKind kind = CallInfo::unknown_kind;
142 int index = resolved_method->vtable_index();
143 if (resolved_method->can_be_statically_bound()) {
144 kind = CallInfo::direct_call;
145 } else if (!resolved_method_holder->is_interface()) {
146 // Could be an Object method inherited into an interface, but still a vtable call.
147 kind = CallInfo::vtable_call;
148 } else if (!resolved_klass->is_interface()) {
149 // A default or miranda method. Compute the vtable index.
150 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
151 _resolved_method);
152 assert(index >= 0 , "we should have valid vtable index at this point");
153
154 kind = CallInfo::vtable_call;
155 } else if (resolved_method->has_vtable_index()) {
156 // Can occur if an interface redeclares a method of Object.
157
158 #ifdef ASSERT
159 // Ensure that this is really the case.
160 Klass* object_klass = SystemDictionary::Object_klass();
161 Method * object_resolved_method = object_klass->vtable().method_at(index);
162 assert(object_resolved_method->name() == resolved_method->name(),
163 "Object and interface method names should match at vtable index %d, %s != %s",
164 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
165 assert(object_resolved_method->signature() == resolved_method->signature(),
166 "Object and interface method signatures should match at vtable index %d, %s != %s",
167 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
168 #endif // ASSERT
169
170 kind = CallInfo::vtable_call;
171 } else {
172 // A regular interface call.
173 kind = CallInfo::itable_call;
174 index = resolved_method->itable_index();
175 }
176 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
177 _call_kind = kind;
178 _call_index = index;
179 _resolved_appendix = Handle();
180 // Find or create a ResolvedMethod instance for this Method*
181 set_resolved_method_name(CHECK);
182
183 DEBUG_ONLY(verify());
184 }
185
186 void CallInfo::set_resolved_method_name(TRAPS) {
187 assert(_resolved_method() != NULL, "Should already have a Method*");
188 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(_resolved_method, CHECK);
189 _resolved_method_name = Handle(THREAD, rmethod_name);
190 }
191
192 #ifdef ASSERT
193 void CallInfo::verify() {
194 switch (call_kind()) { // the meaning and allowed value of index depends on kind
195 case CallInfo::direct_call:
196 if (_call_index == Method::nonvirtual_vtable_index) break;
197 // else fall through to check vtable index:
198 case CallInfo::vtable_call:
199 assert(resolved_klass()->verify_vtable_index(_call_index), "");
200 break;
201 case CallInfo::itable_call:
202 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
203 break;
204 case CallInfo::unknown_kind:
205 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
206 break;
207 default:
208 fatal("Unexpected call kind %d", call_kind());
209 }
210 }
211 #endif // ASSERT
212
213 #ifndef PRODUCT
214 void CallInfo::print() {
215 ResourceMark rm;
216 const char* kindstr;
217 switch (_call_kind) {
218 case direct_call: kindstr = "direct"; break;
219 case vtable_call: kindstr = "vtable"; break;
220 case itable_call: kindstr = "itable"; break;
221 default : kindstr = "unknown"; break;
222 }
223 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
224 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
225 }
226 #endif
227
228 //------------------------------------------------------------------------------------------------------------------------
229 // Implementation of LinkInfo
230
231 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
232 // resolve klass
233 _resolved_klass = pool->klass_ref_at(index, CHECK);
234
235 // Get name, signature, and static klass
236 _name = pool->name_ref_at(index);
237 _signature = pool->signature_ref_at(index);
238 _tag = pool->tag_ref_at(index);
239 _current_klass = pool->pool_holder();
240 _current_method = current_method;
241
242 // Coming from the constant pool always checks access
243 _check_access = true;
244 }
245
246 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
247 // resolve klass
248 _resolved_klass = pool->klass_ref_at(index, CHECK);
249
250 // Get name, signature, and static klass
251 _name = pool->name_ref_at(index);
252 _signature = pool->signature_ref_at(index);
253 _tag = pool->tag_ref_at(index);
254 _current_klass = pool->pool_holder();
255 _current_method = methodHandle();
256
257 // Coming from the constant pool always checks access
258 _check_access = true;
259 }
260
261 #ifndef PRODUCT
262 void LinkInfo::print() {
263 ResourceMark rm;
264 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
265 _resolved_klass->name()->as_C_string(),
266 _name->as_C_string(),
267 _signature->as_C_string(),
268 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
269 _check_access ? "true" : "false");
270 }
271 #endif // PRODUCT
272 //------------------------------------------------------------------------------------------------------------------------
273 // Klass resolution
274
275 void LinkResolver::check_klass_accessibility(Klass* ref_klass, Klass* sel_klass, TRAPS) {
276 Klass* base_klass = sel_klass;
277 if (sel_klass->is_objArray_klass()) {
278 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
279 }
280 // The element type could be a typeArray - we only need the access
281 // check if it is a reference to another class.
282 if (!base_klass->is_instance_klass()) {
283 return; // no relevant check to do
284 }
285
286 Reflection::VerifyClassAccessResults vca_result =
287 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
288 if (vca_result != Reflection::ACCESS_OK) {
289 ResourceMark rm(THREAD);
290 char* msg = Reflection::verify_class_access_msg(ref_klass,
291 InstanceKlass::cast(base_klass),
292 vca_result);
293 bool same_module = (base_klass->module() == ref_klass->module());
294 if (msg == NULL) {
295 Exceptions::fthrow(
296 THREAD_AND_LOCATION,
297 vmSymbols::java_lang_IllegalAccessError(),
298 "failed to access class %s from class %s (%s%s%s)",
299 base_klass->external_name(),
300 ref_klass->external_name(),
301 (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(),
302 (same_module) ? "" : "; ",
303 (same_module) ? "" : ref_klass->class_in_module_of_loader());
304 } else {
305 // Use module specific message returned by verify_class_access_msg().
306 Exceptions::fthrow(
307 THREAD_AND_LOCATION,
308 vmSymbols::java_lang_IllegalAccessError(),
309 "%s", msg);
310 }
311 }
312 }
313
314 //------------------------------------------------------------------------------------------------------------------------
315 // Method resolution
316 //
317 // According to JVM spec. $5.4.3c & $5.4.3d
318
319 // Look up method in klasses, including static methods
320 // Then look up local default methods
321 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
322 bool checkpolymorphism,
323 bool in_imethod_resolve) {
324 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
325
326 Klass* klass = link_info.resolved_klass();
327 Symbol* name = link_info.name();
328 Symbol* signature = link_info.signature();
329
330 // Ignore overpasses so statics can be found during resolution
331 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
332
333 if (klass->is_array_klass()) {
334 // Only consider klass and super klass for arrays
335 return result;
336 }
337
338 InstanceKlass* ik = InstanceKlass::cast(klass);
339
340 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
341 // ignore static and non-public methods of java.lang.Object,
342 // like clone, finalize, registerNatives.
343 if (in_imethod_resolve &&
344 result != NULL &&
345 ik->is_interface() &&
346 (result->is_static() || !result->is_public()) &&
347 result->method_holder() == SystemDictionary::Object_klass()) {
348 result = NULL;
349 }
350
351 // Before considering default methods, check for an overpass in the
352 // current class if a method has not been found.
353 if (result == NULL) {
354 result = ik->find_method(name, signature);
355 }
356
357 if (result == NULL) {
358 Array<Method*>* default_methods = ik->default_methods();
359 if (default_methods != NULL) {
360 result = InstanceKlass::find_method(default_methods, name, signature);
361 }
362 }
363
364 if (checkpolymorphism && result != NULL) {
365 vmIntrinsics::ID iid = result->intrinsic_id();
366 if (MethodHandles::is_signature_polymorphic(iid)) {
367 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
368 return NULL;
369 }
370 }
371 return result;
372 }
373
374 // returns first instance method
375 // Looks up method in classes, then looks up local default methods
376 Method* LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
377 Symbol* name,
378 Symbol* signature,
379 Klass::PrivateLookupMode private_mode, TRAPS) {
380 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
381
382 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
383 Klass* super_klass = result->method_holder()->super();
384 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
385 }
386
387 if (klass->is_array_klass()) {
388 // Only consider klass and super klass for arrays
389 return result;
390 }
391
392 if (result == NULL) {
393 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
394 if (default_methods != NULL) {
395 result = InstanceKlass::find_method(default_methods, name, signature);
396 assert(result == NULL || !result->is_static(), "static defaults not allowed");
397 }
398 }
399 return result;
400 }
401
402 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
403 const methodHandle& resolved_method) {
404
405 int vtable_index = Method::invalid_vtable_index;
406 Symbol* name = resolved_method->name();
407 Symbol* signature = resolved_method->signature();
408 InstanceKlass* ik = InstanceKlass::cast(klass);
409
410 // First check in default method array
411 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
412 int index = InstanceKlass::find_method_index(ik->default_methods(),
413 name, signature, Klass::find_overpass,
414 Klass::find_static, Klass::find_private);
415 if (index >= 0 ) {
416 vtable_index = ik->default_vtable_indices()->at(index);
417 }
418 }
419 if (vtable_index == Method::invalid_vtable_index) {
420 // get vtable_index for miranda methods
421 klassVtable vt = ik->vtable();
422 vtable_index = vt.index_of_miranda(name, signature);
423 }
424 return vtable_index;
425 }
426
427 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
428 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
429
430 // Specify 'true' in order to skip default methods when searching the
431 // interfaces. Function lookup_method_in_klasses() already looked for
432 // the method in the default methods table.
433 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
434 }
435
436 Method* LinkResolver::lookup_polymorphic_method(const LinkInfo& link_info,
437 Handle *appendix_result_or_null,
438 TRAPS) {
439 ResourceMark rm(THREAD);
440 Klass* klass = link_info.resolved_klass();
441 Symbol* name = link_info.name();
442 Symbol* full_signature = link_info.signature();
443 LogTarget(Info, methodhandles) lt_mh;
444
445 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
446 log_info(methodhandles)("lookup_polymorphic_method iid=%s %s.%s%s",
447 vmIntrinsics::name_at(iid), klass->external_name(),
448 name->as_C_string(), full_signature->as_C_string());
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 log_info(methodhandles)("lookup_polymorphic_method %s %s => basic %s",
459 name->as_C_string(),
460 full_signature->as_C_string(),
461 basic_signature->as_C_string());
462 Method* result = SystemDictionary::find_method_handle_intrinsic(iid,
463 basic_signature,
464 CHECK_NULL);
465 if (result != NULL) {
466 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
467 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
468 assert(basic_signature == result->signature(), "predict the result signature");
469 if (lt_mh.is_enabled()) {
470 LogStream ls(lt_mh);
471 ls.print("lookup_polymorphic_method => intrinsic ");
472 result->print_on(&ls);
473 }
474 }
475 return result;
476 } else if (iid == vmIntrinsics::_invokeGeneric
477 && THREAD->can_call_java()
478 && appendix_result_or_null != NULL) {
479 // This is a method with type-checking semantics.
480 // We will ask Java code to spin an adapter method for it.
481 if (!MethodHandles::enabled()) {
482 // Make sure the Java part of the runtime has been booted up.
483 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
484 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
485 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
486 Handle(),
487 Handle(),
488 true,
489 CHECK_NULL);
490 }
491 }
492
493 Handle appendix;
494 Handle method_type;
495 Method* result = SystemDictionary::find_method_handle_invoker(
496 klass,
497 name,
498 full_signature,
499 link_info.current_klass(),
500 &appendix,
501 CHECK_NULL);
502 if (lt_mh.is_enabled()) {
503 LogStream ls(lt_mh);
504 ls.print("lookup_polymorphic_method => (via Java) ");
505 result->print_on(&ls);
506 ls.print(" lookup_polymorphic_method => appendix = ");
507 appendix.is_null() ? ls.print_cr("(none)") : appendix->print_on(&ls);
508 }
509 if (result != NULL) {
510 #ifdef ASSERT
511 ResourceMark rm(THREAD);
512
513 TempNewSymbol basic_signature =
514 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
515 int actual_size_of_params = result->size_of_parameters();
516 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
517 // +1 for MethodHandle.this, +1 for trailing MethodType
518 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
519 if (appendix.not_null()) expected_size_of_params += 1;
520 if (actual_size_of_params != expected_size_of_params) {
521 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
522 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
523 result->print();
524 }
525 assert(actual_size_of_params == expected_size_of_params,
526 "%d != %d", actual_size_of_params, expected_size_of_params);
527 #endif //ASSERT
528
529 assert(appendix_result_or_null != NULL, "");
530 (*appendix_result_or_null) = appendix;
531 }
532 return result;
533 }
534 }
535 return NULL;
536 }
537
538 static void print_nest_host_error_on(stringStream* ss, Klass* ref_klass, Klass* sel_klass, TRAPS) {
539 assert(ref_klass->is_instance_klass(), "must be");
540 assert(sel_klass->is_instance_klass(), "must be");
541 InstanceKlass* ref_ik = InstanceKlass::cast(ref_klass);
542 InstanceKlass* sel_ik = InstanceKlass::cast(sel_klass);
543 const char* nest_host_error_1 = ref_ik->nest_host_error(THREAD);
544 const char* nest_host_error_2 = sel_ik->nest_host_error(THREAD);
545 if (nest_host_error_1 != NULL || nest_host_error_2 != NULL) {
546 ss->print(", (%s%s%s)",
547 (nest_host_error_1 != NULL) ? nest_host_error_1 : "",
548 (nest_host_error_1 != NULL && nest_host_error_2 != NULL) ? ", " : "",
549 (nest_host_error_2 != NULL) ? nest_host_error_2 : "");
550 }
551 }
552
553 void LinkResolver::check_method_accessability(Klass* ref_klass,
554 Klass* resolved_klass,
555 Klass* sel_klass,
556 const methodHandle& sel_method,
557 TRAPS) {
558
559 AccessFlags flags = sel_method->access_flags();
560
561 // Special case: arrays always override "clone". JVMS 2.15.
562 // If the resolved klass is an array class, and the declaring class
563 // is java.lang.Object and the method is "clone", set the flags
564 // to public.
565 //
566 // We'll check for the method name first, as that's most likely
567 // to be false (so we'll short-circuit out of these tests).
568 if (sel_method->name() == vmSymbols::clone_name() &&
569 sel_klass == SystemDictionary::Object_klass() &&
570 resolved_klass->is_array_klass()) {
571 // We need to change "protected" to "public".
572 assert(flags.is_protected(), "clone not protected?");
573 jint new_flags = flags.as_int();
574 new_flags = new_flags & (~JVM_ACC_PROTECTED);
575 new_flags = new_flags | JVM_ACC_PUBLIC;
576 flags.set_flags(new_flags);
577 }
578 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
579
580 bool can_access = Reflection::verify_member_access(ref_klass,
581 resolved_klass,
582 sel_klass,
583 flags,
584 true, false, CHECK);
585 // Any existing exceptions that may have been thrown
586 // have been allowed to propagate.
587 if (!can_access) {
588 ResourceMark rm(THREAD);
589 stringStream ss;
590 bool same_module = (sel_klass->module() == ref_klass->module());
591 ss.print("class %s tried to access %s%s%smethod '%s' (%s%s%s)",
592 ref_klass->external_name(),
593 sel_method->is_abstract() ? "abstract " : "",
594 sel_method->is_protected() ? "protected " : "",
595 sel_method->is_private() ? "private " : "",
596 sel_method->external_name(),
597 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
598 (same_module) ? "" : "; ",
599 (same_module) ? "" : sel_klass->class_in_module_of_loader()
600 );
601
602 // For private access see if there was a problem with nest host
603 // resolution, and if so report that as part of the message.
604 if (sel_method->is_private()) {
605 print_nest_host_error_on(&ss, ref_klass, sel_klass, THREAD);
606 }
607
608 Exceptions::fthrow(THREAD_AND_LOCATION,
609 vmSymbols::java_lang_IllegalAccessError(),
610 "%s",
611 ss.as_string()
612 );
613 return;
614 }
615 }
616
617 Method* LinkResolver::resolve_method_statically(Bytecodes::Code code,
618 const constantPoolHandle& pool, int index, TRAPS) {
619 // This method is used only
620 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
621 // and
622 // (2) in Bytecode_invoke::static_target
623 // It appears to fail when applied to an invokeinterface call site.
624 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
625 // resolve klass
626 if (code == Bytecodes::_invokedynamic) {
627 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
628 Symbol* method_name = vmSymbols::invoke_name();
629 Symbol* method_signature = pool->signature_ref_at(index);
630 Klass* current_klass = pool->pool_holder();
631 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
632 return resolve_method(link_info, code, THREAD);
633 }
634
635 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
636 Klass* resolved_klass = link_info.resolved_klass();
637
638 if (pool->has_preresolution()
639 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
640 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
641 Method* result = ConstantPool::method_at_if_loaded(pool, index);
642 if (result != NULL) {
643 return result;
644 }
645 }
646
647 if (code == Bytecodes::_invokeinterface) {
648 return resolve_interface_method(link_info, code, THREAD);
649 } else if (code == Bytecodes::_invokevirtual) {
650 return resolve_method(link_info, code, THREAD);
651 } else if (!resolved_klass->is_interface()) {
652 return resolve_method(link_info, code, THREAD);
653 } else {
654 return resolve_interface_method(link_info, code, THREAD);
655 }
656 }
657
658 // Check and print a loader constraint violation message for method or interface method
659 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
660 const methodHandle& resolved_method,
661 const char* method_type, TRAPS) {
662 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
663 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
664
665 ResourceMark rm(THREAD);
666 Symbol* failed_type_symbol =
667 SystemDictionary::check_signature_loaders(link_info.signature(),
668 /*klass_being_linked*/ NULL, // We are not linking class
669 current_loader,
670 resolved_loader, true, CHECK);
671 if (failed_type_symbol != NULL) {
672 Klass* current_class = link_info.current_klass();
673 ClassLoaderData* current_loader_data = current_class->class_loader_data();
674 assert(current_loader_data != NULL, "current class has no class loader data");
675 Klass* resolved_method_class = resolved_method->method_holder();
676 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
677 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
678
679 stringStream ss;
680 ss.print("loader constraint violation: when resolving %s '", method_type);
681 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
682 ss.print("' the class loader %s of the current class, %s,"
683 " and the class loader %s for the method's defining class, %s, have"
684 " different Class objects for the type %s used in the signature (%s; %s)",
685 current_loader_data->loader_name_and_id(),
686 current_class->name()->as_C_string(),
687 target_loader_data->loader_name_and_id(),
688 resolved_method_class->name()->as_C_string(),
689 failed_type_symbol->as_C_string(),
690 current_class->class_in_module_of_loader(false, true),
691 resolved_method_class->class_in_module_of_loader(false, true));
692 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
693 }
694 }
695
696 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
697 Klass* current_klass,
698 Klass* sel_klass, TRAPS) {
699 Handle ref_loader(THREAD, current_klass->class_loader());
700 Handle sel_loader(THREAD, sel_klass->class_loader());
701
702 ResourceMark rm(THREAD); // needed for check_signature_loaders
703 Symbol* failed_type_symbol =
704 SystemDictionary::check_signature_loaders(sig,
705 /*klass_being_linked*/ NULL, // We are not linking class
706 ref_loader, sel_loader,
707 false,
708 CHECK);
709 if (failed_type_symbol != NULL) {
710 stringStream ss;
711 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
712
713 ss.print("loader constraint violation: when resolving field \"%s\" of type %s, "
714 "the class loader %s of the current class, %s, "
715 "and the class loader %s for the field's defining %s, %s, "
716 "have different Class objects for type %s (%s; %s)",
717 field->as_C_string(),
718 failed_type_name,
719 current_klass->class_loader_data()->loader_name_and_id(),
720 current_klass->external_name(),
721 sel_klass->class_loader_data()->loader_name_and_id(),
722 sel_klass->external_kind(),
723 sel_klass->external_name(),
724 failed_type_name,
725 current_klass->class_in_module_of_loader(false, true),
726 sel_klass->class_in_module_of_loader(false, true));
727 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
728 }
729 }
730
731 Method* LinkResolver::resolve_method(const LinkInfo& link_info,
732 Bytecodes::Code code, TRAPS) {
733
734 Handle nested_exception;
735 Klass* resolved_klass = link_info.resolved_klass();
736
737 // 1. For invokevirtual, cannot call an interface method
738 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
739 ResourceMark rm(THREAD);
740 char buf[200];
741 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
742 resolved_klass->external_name());
743 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
744 }
745
746 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
747 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
748 ResourceMark rm(THREAD);
749 stringStream ss;
750 ss.print("Method '");
751 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
752 ss.print("' must be Methodref constant");
753 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
754 }
755
756 // 3. lookup method in resolved klass and its super klasses
757 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
758
759 // 4. lookup method in all the interfaces implemented by the resolved klass
760 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
761 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
762
763 if (resolved_method.is_null()) {
764 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
765 Method* method = lookup_polymorphic_method(link_info, (Handle*)NULL, THREAD);
766 resolved_method = methodHandle(THREAD, method);
767 if (HAS_PENDING_EXCEPTION) {
768 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
769 CLEAR_PENDING_EXCEPTION;
770 }
771 }
772 }
773
774 // 5. method lookup failed
775 if (resolved_method.is_null()) {
776 ResourceMark rm(THREAD);
777 stringStream ss;
778 ss.print("'");
779 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
780 ss.print("'");
781 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
782 ss.as_string(), nested_exception, NULL);
783 }
784
785 // 6. access checks, access checking may be turned off when calling from within the VM.
786 Klass* current_klass = link_info.current_klass();
787 if (link_info.check_access()) {
788 assert(current_klass != NULL , "current_klass should not be null");
789
790 // check if method can be accessed by the referring class
791 check_method_accessability(current_klass,
792 resolved_klass,
793 resolved_method->method_holder(),
794 resolved_method,
795 CHECK_NULL);
796
797 // check loader constraints
798 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
799 }
800
801 return resolved_method();
802 }
803
804 static void trace_method_resolution(const char* prefix,
805 Klass* klass,
806 Klass* resolved_klass,
807 Method* method,
808 bool logitables,
809 int index = -1) {
810 #ifndef PRODUCT
811 ResourceMark rm;
812 Log(itables) logi;
813 LogStream lsi(logi.trace());
814 Log(vtables) logv;
815 LogStream lsv(logv.trace());
816 outputStream* st;
817 if (logitables) {
818 st = &lsi;
819 } else {
820 st = &lsv;
821 }
822 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
823 prefix,
824 (klass == NULL ? "<NULL>" : klass->internal_name()),
825 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
826 Method::name_and_sig_as_C_string(resolved_klass,
827 method->name(),
828 method->signature()),
829 method->method_holder()->internal_name());
830 method->print_linkage_flags(st);
831 if (index != -1) {
832 st->print("vtable_index:%d", index);
833 }
834 st->cr();
835 #endif // PRODUCT
836 }
837
838 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
839 Method* LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
840
841 Klass* resolved_klass = link_info.resolved_klass();
842
843 // check if klass is interface
844 if (!resolved_klass->is_interface()) {
845 ResourceMark rm(THREAD);
846 char buf[200];
847 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
848 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
849 }
850
851 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
852 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
853 ResourceMark rm(THREAD);
854 stringStream ss;
855 ss.print("Method '");
856 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
857 ss.print("' must be InterfaceMethodref constant");
858 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
859 }
860
861 // lookup method in this interface or its super, java.lang.Object
862 // JDK8: also look for static methods
863 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
864
865 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
866 // lookup method in all the super-interfaces
867 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
868 }
869
870 if (resolved_method.is_null()) {
871 // no method found
872 ResourceMark rm(THREAD);
873 stringStream ss;
874 ss.print("'");
875 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
876 ss.print("'");
877 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
878 }
879
880 if (link_info.check_access()) {
881 // JDK8 adds non-public interface methods, and accessability check requirement
882 Klass* current_klass = link_info.current_klass();
883
884 assert(current_klass != NULL , "current_klass should not be null");
885
886 // check if method can be accessed by the referring class
887 check_method_accessability(current_klass,
888 resolved_klass,
889 resolved_method->method_holder(),
890 resolved_method,
891 CHECK_NULL);
892
893 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
894 }
895
896 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
897 ResourceMark rm(THREAD);
898 stringStream ss;
899 ss.print("Expected instance not static method '");
900 Method::print_external_name(&ss, resolved_klass,
901 resolved_method->name(), resolved_method->signature());
902 ss.print("'");
903 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
904 }
905
906 if (log_develop_is_enabled(Trace, itables)) {
907 char buf[200];
908 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
909 Bytecodes::name(code));
910 trace_method_resolution(buf, link_info.current_klass(), resolved_klass, resolved_method(), true);
911 }
912
913 return resolved_method();
914 }
915
916 //------------------------------------------------------------------------------------------------------------------------
917 // Field resolution
918
919 void LinkResolver::check_field_accessability(Klass* ref_klass,
920 Klass* resolved_klass,
921 Klass* sel_klass,
922 const fieldDescriptor& fd,
923 TRAPS) {
924 bool can_access = Reflection::verify_member_access(ref_klass,
925 resolved_klass,
926 sel_klass,
927 fd.access_flags(),
928 true, false, CHECK);
929 // Any existing exceptions that may have been thrown, for example LinkageErrors
930 // from nest-host resolution, have been allowed to propagate.
931 if (!can_access) {
932 bool same_module = (sel_klass->module() == ref_klass->module());
933 ResourceMark rm(THREAD);
934 stringStream ss;
935 ss.print("class %s tried to access %s%sfield %s.%s (%s%s%s)",
936 ref_klass->external_name(),
937 fd.is_protected() ? "protected " : "",
938 fd.is_private() ? "private " : "",
939 sel_klass->external_name(),
940 fd.name()->as_C_string(),
941 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
942 (same_module) ? "" : "; ",
943 (same_module) ? "" : sel_klass->class_in_module_of_loader()
944 );
945 // For private access see if there was a problem with nest host
946 // resolution, and if so report that as part of the message.
947 if (fd.is_private()) {
948 print_nest_host_error_on(&ss, ref_klass, sel_klass, THREAD);
949 }
950 Exceptions::fthrow(THREAD_AND_LOCATION,
951 vmSymbols::java_lang_IllegalAccessError(),
952 "%s",
953 ss.as_string()
954 );
955 return;
956 }
957 }
958
959 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
960 LinkInfo link_info(pool, index, method, CHECK);
961 resolve_field(fd, link_info, byte, true, CHECK);
962 }
963
964 void LinkResolver::resolve_field(fieldDescriptor& fd,
965 const LinkInfo& link_info,
966 Bytecodes::Code byte, bool initialize_class,
967 TRAPS) {
968 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
969 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
970 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
971 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
972
973 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
974 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
975 // Check if there's a resolved klass containing the field
976 Klass* resolved_klass = link_info.resolved_klass();
977 Symbol* field = link_info.name();
978 Symbol* sig = link_info.signature();
979
980 if (resolved_klass == NULL) {
981 ResourceMark rm(THREAD);
982 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
983 }
984
985 // Resolve instance field
986 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
987 // check if field exists; i.e., if a klass containing the field def has been selected
988 if (sel_klass == NULL) {
989 ResourceMark rm(THREAD);
990 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
991 }
992
993 // Access checking may be turned off when calling from within the VM.
994 Klass* current_klass = link_info.current_klass();
995 if (link_info.check_access()) {
996
997 // check access
998 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
999
1000 // check for errors
1001 if (is_static != fd.is_static()) {
1002 ResourceMark rm(THREAD);
1003 char msg[200];
1004 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
1005 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
1006 }
1007
1008 // A final field can be modified only
1009 // (1) by methods declared in the class declaring the field and
1010 // (2) by the <clinit> method (in case of a static field)
1011 // or by the <init> method (in case of an instance field).
1012 if (is_put && fd.access_flags().is_final()) {
1013
1014 if (sel_klass != current_klass) {
1015 ResourceMark rm(THREAD);
1016 stringStream ss;
1017 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1018 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1019 current_klass->external_name());
1020 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1021 }
1022
1023 if (fd.constants()->pool_holder()->major_version() >= 53) {
1024 Method* m = link_info.current_method();
1025 assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
1026 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1027 fd.is_static() &&
1028 !m->is_static_initializer());
1029 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1030 !fd.is_static() &&
1031 !m->is_object_initializer());
1032
1033 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1034 ResourceMark rm(THREAD);
1035 stringStream ss;
1036 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1037 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1038 m->name()->as_C_string(),
1039 is_static ? "<clinit>" : "<init>");
1040 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1041 }
1042 }
1043 }
1044
1045 // initialize resolved_klass if necessary
1046 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1047 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1048 //
1049 // note 2: we don't want to force initialization if we are just checking
1050 // if the field access is legal; e.g., during compilation
1051 if (is_static && initialize_class) {
1052 sel_klass->initialize(CHECK);
1053 }
1054 }
1055
1056 if ((sel_klass != current_klass) && (current_klass != NULL)) {
1057 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1058 }
1059
1060 // return information. note that the klass is set to the actual klass containing the
1061 // field, otherwise access of static fields in superclasses will not work.
1062 }
1063
1064
1065 //------------------------------------------------------------------------------------------------------------------------
1066 // Invoke resolution
1067 //
1068 // Naming conventions:
1069 //
1070 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1071 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1072 // resolved_klass the specified klass (i.e., specified via constant pool index)
1073 // recv_klass the receiver klass
1074
1075
1076 void LinkResolver::resolve_static_call(CallInfo& result,
1077 const LinkInfo& link_info,
1078 bool initialize_class, TRAPS) {
1079 Method* resolved_method = linktime_resolve_static_method(link_info, CHECK);
1080
1081 // The resolved class can change as a result of this resolution.
1082 Klass* resolved_klass = resolved_method->method_holder();
1083
1084 // Initialize klass (this should only happen if everything is ok)
1085 if (initialize_class && resolved_klass->should_be_initialized()) {
1086 resolved_klass->initialize(CHECK);
1087 // Use updated LinkInfo to reresolve with resolved method holder
1088 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1089 link_info.current_klass(),
1090 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1091 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1092 }
1093
1094 // setup result
1095 result.set_static(resolved_klass, methodHandle(THREAD, resolved_method), CHECK);
1096 }
1097
1098 // throws linktime exceptions
1099 Method* LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1100
1101 Klass* resolved_klass = link_info.resolved_klass();
1102 Method* resolved_method;
1103 if (!resolved_klass->is_interface()) {
1104 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1105 } else {
1106 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1107 }
1108 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1109
1110 // check if static
1111 if (!resolved_method->is_static()) {
1112 ResourceMark rm(THREAD);
1113 stringStream ss;
1114 ss.print("Expected static method '");
1115 resolved_method->print_external_name(&ss);
1116 ss.print("'");
1117 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1118 }
1119 return resolved_method;
1120 }
1121
1122
1123 void LinkResolver::resolve_special_call(CallInfo& result,
1124 Handle recv,
1125 const LinkInfo& link_info,
1126 TRAPS) {
1127 Method* resolved_method = linktime_resolve_special_method(link_info, CHECK);
1128 runtime_resolve_special_method(result, link_info, methodHandle(THREAD, resolved_method), recv, CHECK);
1129 }
1130
1131 // throws linktime exceptions
1132 Method* LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, TRAPS) {
1133
1134 // Invokespecial is called for multiple special reasons:
1135 // <init>
1136 // local private method invocation, for classes and interfaces
1137 // superclass.method, which can also resolve to a default method
1138 // and the selected method is recalculated relative to the direct superclass
1139 // superinterface.method, which explicitly does not check shadowing
1140 Klass* resolved_klass = link_info.resolved_klass();
1141 Method* resolved_method;
1142
1143 if (!resolved_klass->is_interface()) {
1144 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1145 } else {
1146 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1147 }
1148
1149 // check if method name is <init>, that it is found in same klass as static type
1150 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1151 resolved_method->method_holder() != resolved_klass) {
1152 ResourceMark rm(THREAD);
1153 stringStream ss;
1154 ss.print("%s: method '", resolved_klass->external_name());
1155 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1156 ss.print(" %s(", resolved_method->name()->as_C_string());
1157 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1158 ss.print(")' not found");
1159 Exceptions::fthrow(
1160 THREAD_AND_LOCATION,
1161 vmSymbols::java_lang_NoSuchMethodError(),
1162 "%s", ss.as_string());
1163 return NULL;
1164 }
1165
1166 // ensure that invokespecial's interface method reference is in
1167 // a direct superinterface, not an indirect superinterface
1168 Klass* current_klass = link_info.current_klass();
1169 if (current_klass != NULL && resolved_klass->is_interface()) {
1170 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1171 InstanceKlass *klass_to_check = !ck->is_unsafe_anonymous() ?
1172 ck :
1173 ck->unsafe_anonymous_host();
1174 // Disable verification for the dynamically-generated reflection bytecodes.
1175 bool is_reflect = klass_to_check->is_subclass_of(
1176 SystemDictionary::reflect_MagicAccessorImpl_klass());
1177
1178 if (!is_reflect &&
1179 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1180 ResourceMark rm(THREAD);
1181 stringStream ss;
1182 ss.print("Interface method reference: '");
1183 resolved_method->print_external_name(&ss);
1184 ss.print("', is in an indirect superinterface of %s",
1185 current_klass->external_name());
1186 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1187 }
1188 }
1189
1190 // check if not static
1191 if (resolved_method->is_static()) {
1192 ResourceMark rm(THREAD);
1193 stringStream ss;
1194 ss.print("Expecting non-static method '");
1195 resolved_method->print_external_name(&ss);
1196 ss.print("'");
1197 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1198 }
1199
1200 if (log_develop_is_enabled(Trace, itables)) {
1201 trace_method_resolution("invokespecial resolved method: caller-class:",
1202 current_klass, resolved_klass, resolved_method, true);
1203 }
1204
1205 return resolved_method;
1206 }
1207
1208 // throws runtime exceptions
1209 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1210 const LinkInfo& link_info,
1211 const methodHandle& resolved_method,
1212 Handle recv, TRAPS) {
1213
1214 Klass* resolved_klass = link_info.resolved_klass();
1215
1216 // resolved method is selected method unless we have an old-style lookup
1217 // for a superclass method
1218 // Invokespecial for a superinterface, resolved method is selected method,
1219 // no checks for shadowing
1220 methodHandle sel_method(THREAD, resolved_method());
1221
1222 if (link_info.check_access() &&
1223 // check if the method is not <init>
1224 resolved_method->name() != vmSymbols::object_initializer_name()) {
1225
1226 Klass* current_klass = link_info.current_klass();
1227
1228 // Check if the class of the resolved_klass is a superclass
1229 // (not supertype in order to exclude interface classes) of the current class.
1230 // This check is not performed for super.invoke for interface methods
1231 // in super interfaces.
1232 if (current_klass->is_subclass_of(resolved_klass) &&
1233 current_klass != resolved_klass) {
1234 // Lookup super method
1235 Klass* super_klass = current_klass->super();
1236 Method* instance_method = lookup_instance_method_in_klasses(super_klass,
1237 resolved_method->name(),
1238 resolved_method->signature(),
1239 Klass::find_private, CHECK);
1240 sel_method = methodHandle(THREAD, instance_method);
1241
1242 // check if found
1243 if (sel_method.is_null()) {
1244 ResourceMark rm(THREAD);
1245 stringStream ss;
1246 ss.print("'");
1247 resolved_method->print_external_name(&ss);
1248 ss.print("'");
1249 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1250 // check loader constraints if found a different method
1251 } else if (sel_method() != resolved_method()) {
1252 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1253 }
1254 }
1255
1256 // Check that the class of objectref (the receiver) is the current class or interface,
1257 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1258 // throws IllegalAccessError.
1259 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1260 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1261 // a class. If the sender is an interface, the check has to be performed at runtime.
1262 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1263 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1264 if (sender->is_interface() && recv.not_null()) {
1265 Klass* receiver_klass = recv->klass();
1266 if (!receiver_klass->is_subtype_of(sender)) {
1267 ResourceMark rm(THREAD);
1268 char buf[500];
1269 jio_snprintf(buf, sizeof(buf),
1270 "Receiver class %s must be the current class or a subtype of interface %s",
1271 receiver_klass->external_name(),
1272 sender->external_name());
1273 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1274 }
1275 }
1276 }
1277
1278 // check if not static
1279 if (sel_method->is_static()) {
1280 ResourceMark rm(THREAD);
1281 stringStream ss;
1282 ss.print("Expecting non-static method '");
1283 resolved_method->print_external_name(&ss);
1284 ss.print("'");
1285 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1286 }
1287
1288 // check if abstract
1289 if (sel_method->is_abstract()) {
1290 ResourceMark rm(THREAD);
1291 stringStream ss;
1292 ss.print("'");
1293 Method::print_external_name(&ss, resolved_klass, sel_method->name(), sel_method->signature());
1294 ss.print("'");
1295 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1296 }
1297
1298 if (log_develop_is_enabled(Trace, itables)) {
1299 trace_method_resolution("invokespecial selected method: resolved-class:",
1300 resolved_klass, resolved_klass, sel_method(), true);
1301 }
1302
1303 // setup result
1304 result.set_static(resolved_klass, sel_method, CHECK);
1305 }
1306
1307 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1308 const LinkInfo& link_info,
1309 bool check_null_and_abstract, TRAPS) {
1310 Method* resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1311 runtime_resolve_virtual_method(result, methodHandle(THREAD, resolved_method),
1312 link_info.resolved_klass(),
1313 recv, receiver_klass,
1314 check_null_and_abstract, CHECK);
1315 }
1316
1317 // throws linktime exceptions
1318 Method* LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1319 TRAPS) {
1320 // normal method resolution
1321 Method* resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1322
1323 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1324 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1325
1326 // check if private interface method
1327 Klass* resolved_klass = link_info.resolved_klass();
1328 Klass* current_klass = link_info.current_klass();
1329
1330 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1331 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1332 ResourceMark rm(THREAD);
1333 stringStream ss;
1334 ss.print("private interface method requires invokespecial, not invokevirtual: method '");
1335 resolved_method->print_external_name(&ss);
1336 ss.print("', caller-class: %s",
1337 (current_klass == NULL ? "<null>" : current_klass->internal_name()));
1338 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1339 }
1340
1341 // check if not static
1342 if (resolved_method->is_static()) {
1343 ResourceMark rm(THREAD);
1344 stringStream ss;
1345 ss.print("Expecting non-static method '");
1346 resolved_method->print_external_name(&ss);
1347 ss.print("'");
1348 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1349 }
1350
1351 if (log_develop_is_enabled(Trace, vtables)) {
1352 trace_method_resolution("invokevirtual resolved method: caller-class:",
1353 current_klass, resolved_klass, resolved_method, false);
1354 }
1355
1356 return resolved_method;
1357 }
1358
1359 // throws runtime exceptions
1360 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1361 const methodHandle& resolved_method,
1362 Klass* resolved_klass,
1363 Handle recv,
1364 Klass* recv_klass,
1365 bool check_null_and_abstract,
1366 TRAPS) {
1367
1368 // setup default return values
1369 int vtable_index = Method::invalid_vtable_index;
1370 methodHandle selected_method;
1371
1372 // runtime method resolution
1373 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1374 THROW(vmSymbols::java_lang_NullPointerException());
1375 }
1376
1377 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1378 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1379 // a missing receiver might result in a bogus lookup.
1380 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1381
1382 // do lookup based on receiver klass using the vtable index
1383 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1384 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1385 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1386
1387 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1388 } else {
1389 // at this point we are sure that resolved_method is virtual and not
1390 // a default or miranda method; therefore, it must have a valid vtable index.
1391 assert(!resolved_method->has_itable_index(), "");
1392 vtable_index = resolved_method->vtable_index();
1393 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1394 // methods, or for final methods. Private methods never appear in the vtable
1395 // and never override other methods. As an optimization, final methods are
1396 // never put in the vtable, unless they override an existing method.
1397 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1398 // resolved method, and it can never be changed by an override.
1399 if (vtable_index == Method::nonvirtual_vtable_index) {
1400 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1401 selected_method = resolved_method;
1402 } else {
1403 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1404 }
1405 }
1406
1407 // check if method exists
1408 if (selected_method.is_null()) {
1409 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1410 }
1411
1412 // check if abstract
1413 if (check_null_and_abstract && selected_method->is_abstract()) {
1414 // Pass arguments for generating a verbose error message.
1415 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1416 }
1417
1418 if (log_develop_is_enabled(Trace, vtables)) {
1419 trace_method_resolution("invokevirtual selected method: receiver-class:",
1420 recv_klass, resolved_klass, selected_method(),
1421 false, vtable_index);
1422 }
1423 // setup result
1424 result.set_virtual(resolved_klass, resolved_method, selected_method, vtable_index, CHECK);
1425 }
1426
1427 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1428 const LinkInfo& link_info,
1429 bool check_null_and_abstract, TRAPS) {
1430 // throws linktime exceptions
1431 Method* resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1432 methodHandle mh(THREAD, resolved_method);
1433 runtime_resolve_interface_method(result, mh, link_info.resolved_klass(),
1434 recv, recv_klass, check_null_and_abstract, CHECK);
1435 }
1436
1437 Method* LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1438 TRAPS) {
1439 // normal interface method resolution
1440 Method* resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1441 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1442 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1443
1444 return resolved_method;
1445 }
1446
1447 // throws runtime exceptions
1448 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1449 const methodHandle& resolved_method,
1450 Klass* resolved_klass,
1451 Handle recv,
1452 Klass* recv_klass,
1453 bool check_null_and_abstract, TRAPS) {
1454
1455 // check if receiver exists
1456 if (check_null_and_abstract && recv.is_null()) {
1457 THROW(vmSymbols::java_lang_NullPointerException());
1458 }
1459
1460 // check if receiver klass implements the resolved interface
1461 if (!recv_klass->is_subtype_of(resolved_klass)) {
1462 ResourceMark rm(THREAD);
1463 char buf[200];
1464 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1465 recv_klass->external_name(),
1466 resolved_klass->external_name());
1467 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1468 }
1469
1470 methodHandle selected_method = resolved_method;
1471
1472 // resolve the method in the receiver class, unless it is private
1473 if (!resolved_method()->is_private()) {
1474 // do lookup based on receiver klass
1475 // This search must match the linktime preparation search for itable initialization
1476 // to correctly enforce loader constraints for interface method inheritance.
1477 // Private methods are skipped as the resolved method was not private.
1478 Method* method = lookup_instance_method_in_klasses(recv_klass,
1479 resolved_method->name(),
1480 resolved_method->signature(),
1481 Klass::skip_private, CHECK);
1482 selected_method = methodHandle(THREAD, method);
1483
1484 if (selected_method.is_null() && !check_null_and_abstract) {
1485 // In theory this is a harmless placeholder value, but
1486 // in practice leaving in null affects the nsk default method tests.
1487 // This needs further study.
1488 selected_method = resolved_method;
1489 }
1490 // check if method exists
1491 if (selected_method.is_null()) {
1492 // Pass arguments for generating a verbose error message.
1493 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1494 }
1495 // check access
1496 // Throw Illegal Access Error if selected_method is not public.
1497 if (!selected_method->is_public()) {
1498 ResourceMark rm(THREAD);
1499 stringStream ss;
1500 ss.print("'");
1501 Method::print_external_name(&ss, recv_klass, selected_method->name(), selected_method->signature());
1502 ss.print("'");
1503 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1504 }
1505 // check if abstract
1506 if (check_null_and_abstract && selected_method->is_abstract()) {
1507 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1508 }
1509 }
1510
1511 if (log_develop_is_enabled(Trace, itables)) {
1512 trace_method_resolution("invokeinterface selected method: receiver-class:",
1513 recv_klass, resolved_klass, selected_method(), true);
1514 }
1515 // setup result
1516 if (resolved_method->has_vtable_index()) {
1517 int vtable_index = resolved_method->vtable_index();
1518 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1519 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1520 result.set_virtual(resolved_klass, resolved_method, selected_method, vtable_index, CHECK);
1521 } else if (resolved_method->has_itable_index()) {
1522 int itable_index = resolved_method()->itable_index();
1523 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1524 result.set_interface(resolved_klass, resolved_method, selected_method, itable_index, CHECK);
1525 } else {
1526 int index = resolved_method->vtable_index();
1527 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1528 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1529 assert(resolved_method()->is_private() ||
1530 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1531 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1532 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1533 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1534 result.set_virtual(resolved_klass, resolved_method, resolved_method, index, CHECK);
1535 }
1536 }
1537
1538
1539 Method* LinkResolver::linktime_resolve_interface_method_or_null(
1540 const LinkInfo& link_info) {
1541 EXCEPTION_MARK;
1542 Method* method_result = linktime_resolve_interface_method(link_info, THREAD);
1543 if (HAS_PENDING_EXCEPTION) {
1544 CLEAR_PENDING_EXCEPTION;
1545 return NULL;
1546 } else {
1547 return method_result;
1548 }
1549 }
1550
1551 Method* LinkResolver::linktime_resolve_virtual_method_or_null(
1552 const LinkInfo& link_info) {
1553 EXCEPTION_MARK;
1554 Method* method_result = linktime_resolve_virtual_method(link_info, THREAD);
1555 if (HAS_PENDING_EXCEPTION) {
1556 CLEAR_PENDING_EXCEPTION;
1557 return NULL;
1558 } else {
1559 return method_result;
1560 }
1561 }
1562
1563 Method* LinkResolver::resolve_virtual_call_or_null(
1564 Klass* receiver_klass,
1565 const LinkInfo& link_info) {
1566 EXCEPTION_MARK;
1567 CallInfo info;
1568 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1569 if (HAS_PENDING_EXCEPTION) {
1570 CLEAR_PENDING_EXCEPTION;
1571 return NULL;
1572 }
1573 return info.selected_method();
1574 }
1575
1576 Method* LinkResolver::resolve_interface_call_or_null(
1577 Klass* receiver_klass,
1578 const LinkInfo& link_info) {
1579 EXCEPTION_MARK;
1580 CallInfo info;
1581 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1582 if (HAS_PENDING_EXCEPTION) {
1583 CLEAR_PENDING_EXCEPTION;
1584 return NULL;
1585 }
1586 return info.selected_method();
1587 }
1588
1589 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1590 const LinkInfo& link_info) {
1591 EXCEPTION_MARK;
1592 CallInfo info;
1593 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1594 /*check_null_or_abstract*/false, THREAD);
1595 if (HAS_PENDING_EXCEPTION) {
1596 CLEAR_PENDING_EXCEPTION;
1597 return Method::invalid_vtable_index;
1598 }
1599 return info.vtable_index();
1600 }
1601
1602 Method* LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1603 EXCEPTION_MARK;
1604 CallInfo info;
1605 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1606 if (HAS_PENDING_EXCEPTION) {
1607 CLEAR_PENDING_EXCEPTION;
1608 return NULL;
1609 }
1610 return info.selected_method();
1611 }
1612
1613 Method* LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1614 EXCEPTION_MARK;
1615 CallInfo info;
1616 resolve_special_call(info, Handle(), link_info, THREAD);
1617 if (HAS_PENDING_EXCEPTION) {
1618 CLEAR_PENDING_EXCEPTION;
1619 return NULL;
1620 }
1621 return info.selected_method();
1622 }
1623
1624
1625
1626 //------------------------------------------------------------------------------------------------------------------------
1627 // ConstantPool entries
1628
1629 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1630 switch (byte) {
1631 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1632 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1633 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1634 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1635 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1636 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1637 default : break;
1638 }
1639 return;
1640 }
1641
1642 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1643 const methodHandle& attached_method,
1644 Bytecodes::Code byte, TRAPS) {
1645 Klass* defc = attached_method->method_holder();
1646 Symbol* name = attached_method->name();
1647 Symbol* type = attached_method->signature();
1648 LinkInfo link_info(defc, name, type);
1649 switch(byte) {
1650 case Bytecodes::_invokevirtual:
1651 resolve_virtual_call(result, recv, recv->klass(), link_info,
1652 /*check_null_and_abstract=*/true, CHECK);
1653 break;
1654 case Bytecodes::_invokeinterface:
1655 resolve_interface_call(result, recv, recv->klass(), link_info,
1656 /*check_null_and_abstract=*/true, CHECK);
1657 break;
1658 case Bytecodes::_invokestatic:
1659 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1660 break;
1661 case Bytecodes::_invokespecial:
1662 resolve_special_call(result, recv, link_info, CHECK);
1663 break;
1664 default:
1665 fatal("bad call: %s", Bytecodes::name(byte));
1666 break;
1667 }
1668 }
1669
1670 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1671 LinkInfo link_info(pool, index, CHECK);
1672 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1673 }
1674
1675
1676 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1677 const constantPoolHandle& pool, int index, TRAPS) {
1678 LinkInfo link_info(pool, index, CHECK);
1679 resolve_special_call(result, recv, link_info, CHECK);
1680 }
1681
1682
1683 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1684 const constantPoolHandle& pool, int index,
1685 TRAPS) {
1686
1687 LinkInfo link_info(pool, index, CHECK);
1688 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1689 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1690 }
1691
1692
1693 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1694 LinkInfo link_info(pool, index, CHECK);
1695 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1696 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1697 }
1698
1699
1700 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1701 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1702 LinkInfo link_info(pool, index, CHECK);
1703 if (log_is_enabled(Info, methodhandles)) {
1704 ResourceMark rm(THREAD);
1705 log_info(methodhandles)("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1706 link_info.signature()->as_C_string());
1707 }
1708 resolve_handle_call(result, link_info, CHECK);
1709 }
1710
1711 void LinkResolver::resolve_handle_call(CallInfo& result,
1712 const LinkInfo& link_info,
1713 TRAPS) {
1714 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1715 Klass* resolved_klass = link_info.resolved_klass();
1716 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1717 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1718 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1719 Handle resolved_appendix;
1720 Method* resolved_method = lookup_polymorphic_method(link_info, &resolved_appendix, CHECK);
1721 result.set_handle(resolved_klass, methodHandle(THREAD, resolved_method), resolved_appendix, CHECK);
1722 }
1723
1724 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int indy_index, TRAPS) {
1725 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(indy_index);
1726 int pool_index = cpce->constant_pool_index();
1727
1728 // Resolve the bootstrap specifier (BSM + optional arguments).
1729 BootstrapInfo bootstrap_specifier(pool, pool_index, indy_index);
1730
1731 // Check if CallSite has been bound already or failed already, and short circuit:
1732 {
1733 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1734 if (is_done) return;
1735 }
1736
1737 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1738 // reference to a method handle which will be the bootstrap method for a dynamic
1739 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1740 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1741 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1742 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1743 // this bootstrap method will encounter the resolution of MethodHandleInError.
1744
1745 resolve_dynamic_call(result, bootstrap_specifier, CHECK);
1746
1747 LogTarget(Debug, methodhandles, indy) lt_indy;
1748 if (lt_indy.is_enabled()) {
1749 LogStream ls(lt_indy);
1750 bootstrap_specifier.print_msg_on(&ls, "resolve_invokedynamic");
1751 }
1752
1753 // The returned linkage result is provisional up to the moment
1754 // the interpreter or runtime performs a serialized check of
1755 // the relevant CPCE::f1 field. This is done by the caller
1756 // of this method, via CPCE::set_dynamic_call, which uses
1757 // an ObjectLocker to do the final serialization of updates
1758 // to CPCE state, including f1.
1759 }
1760
1761 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1762 BootstrapInfo& bootstrap_specifier,
1763 TRAPS) {
1764 // JSR 292: this must resolve to an implicitly generated method
1765 // such as MH.linkToCallSite(*...) or some other call-site shape.
1766 // The appendix argument is likely to be a freshly-created CallSite.
1767 // It may also be a MethodHandle from an unwrapped ConstantCallSite,
1768 // or any other reference. The resolved_method as well as the appendix
1769 // are both recorded together via CallInfo::set_handle.
1770 SystemDictionary::invoke_bootstrap_method(bootstrap_specifier, THREAD);
1771 Exceptions::wrap_dynamic_exception(/* is_indy */ true, THREAD);
1772
1773 if (HAS_PENDING_EXCEPTION) {
1774 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1775 // Let any random low-level IE or SOE or OOME just bleed through.
1776 // Basically we pretend that the bootstrap method was never called,
1777 // if it fails this way: We neither record a successful linkage,
1778 // nor do we memorize a LE for posterity.
1779 return;
1780 }
1781 // JVMS 5.4.3 says: If an attempt by the Java Virtual Machine to resolve
1782 // a symbolic reference fails because an error is thrown that is an
1783 // instance of LinkageError (or a subclass), then subsequent attempts to
1784 // resolve the reference always fail with the same error that was thrown
1785 // as a result of the initial resolution attempt.
1786 bool recorded_res_status = bootstrap_specifier.save_and_throw_indy_exc(CHECK);
1787 if (!recorded_res_status) {
1788 // Another thread got here just before we did. So, either use the method
1789 // that it resolved or throw the LinkageError exception that it threw.
1790 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1791 if (is_done) return;
1792 }
1793 assert(bootstrap_specifier.invokedynamic_cp_cache_entry()->indy_resolution_failed(),
1794 "Resolution failure flag wasn't set");
1795 }
1796
1797 bootstrap_specifier.resolve_newly_linked_invokedynamic(result, CHECK);
1798 // Exceptions::wrap_dynamic_exception not used because
1799 // set_handle doesn't throw linkage errors
1800 }
1801
1802 // Selected method is abstract.
1803 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1804 const methodHandle& selected_method,
1805 Klass *recv_klass, TRAPS) {
1806 Klass *resolved_klass = resolved_method->method_holder();
1807 ResourceMark rm(THREAD);
1808 stringStream ss;
1809
1810 if (recv_klass != NULL) {
1811 ss.print("Receiver class %s does not define or inherit an "
1812 "implementation of the",
1813 recv_klass->external_name());
1814 } else {
1815 ss.print("Missing implementation of");
1816 }
1817
1818 assert(resolved_method.not_null(), "Sanity");
1819 ss.print(" resolved method '%s%s",
1820 resolved_method->is_abstract() ? "abstract " : "",
1821 resolved_method->is_private() ? "private " : "");
1822 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1823 ss.print(" %s(", resolved_method->name()->as_C_string());
1824 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1825 ss.print(")' of %s %s.",
1826 resolved_klass->external_kind(),
1827 resolved_klass->external_name());
1828
1829 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1830 ss.print(" Selected method is '%s%s",
1831 selected_method->is_abstract() ? "abstract " : "",
1832 selected_method->is_private() ? "private " : "");
1833 selected_method->print_external_name(&ss);
1834 ss.print("'.");
1835 }
1836
1837 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1838 }