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 Klass* klass = link_info.resolved_klass();
440 Symbol* name = link_info.name();
441 Symbol* full_signature = link_info.signature();
442
443 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
444 if (TraceMethodHandles) {
445 ResourceMark rm(THREAD);
446 tty->print_cr("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 }
450 if ((klass == SystemDictionary::MethodHandle_klass() ||
451 klass == SystemDictionary::VarHandle_klass()) &&
452 iid != vmIntrinsics::_none) {
453 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
454 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
455 // Do not erase last argument type (MemberName) if it is a static linkTo method.
456 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
457 TempNewSymbol basic_signature =
458 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
459 if (TraceMethodHandles) {
460 ResourceMark rm(THREAD);
461 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
462 name->as_C_string(),
463 full_signature->as_C_string(),
464 basic_signature->as_C_string());
465 }
466 Method* result = SystemDictionary::find_method_handle_intrinsic(iid,
467 basic_signature,
468 CHECK_NULL);
469 if (result != NULL) {
470 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
471 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
472 assert(basic_signature == result->signature(), "predict the result signature");
473 if (TraceMethodHandles) {
474 ttyLocker ttyl;
475 tty->print("lookup_polymorphic_method => intrinsic ");
476 result->print_on(tty);
477 }
478 }
479 return result;
480 } else if (iid == vmIntrinsics::_invokeGeneric
481 && THREAD->can_call_java()
482 && appendix_result_or_null != NULL) {
483 // This is a method with type-checking semantics.
484 // We will ask Java code to spin an adapter method for it.
485 if (!MethodHandles::enabled()) {
486 // Make sure the Java part of the runtime has been booted up.
487 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
488 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
489 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
490 Handle(),
491 Handle(),
492 true,
493 CHECK_NULL);
494 }
495 }
496
497 Handle appendix;
498 Handle method_type;
499 Method* result = SystemDictionary::find_method_handle_invoker(
500 klass,
501 name,
502 full_signature,
503 link_info.current_klass(),
504 &appendix,
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 != 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 }
537 return result;
538 }
539 }
540 return NULL;
541 }
542
543 static void print_nest_host_error_on(stringStream* ss, Klass* ref_klass, Klass* sel_klass, TRAPS) {
544 assert(ref_klass->is_instance_klass(), "must be");
545 assert(sel_klass->is_instance_klass(), "must be");
546 InstanceKlass* ref_ik = InstanceKlass::cast(ref_klass);
547 InstanceKlass* sel_ik = InstanceKlass::cast(sel_klass);
548 const char* nest_host_error_1 = ref_ik->nest_host_error(THREAD);
549 const char* nest_host_error_2 = sel_ik->nest_host_error(THREAD);
550 if (nest_host_error_1 != NULL || nest_host_error_2 != NULL) {
551 ss->print(", (%s%s%s)",
552 (nest_host_error_1 != NULL) ? nest_host_error_1 : "",
553 (nest_host_error_1 != NULL && nest_host_error_2 != NULL) ? ", " : "",
554 (nest_host_error_2 != NULL) ? nest_host_error_2 : "");
555 }
556 }
557
558 void LinkResolver::check_method_accessability(Klass* ref_klass,
559 Klass* resolved_klass,
560 Klass* sel_klass,
561 const methodHandle& sel_method,
562 TRAPS) {
563
564 AccessFlags flags = sel_method->access_flags();
565
566 // Special case: arrays always override "clone". JVMS 2.15.
567 // If the resolved klass is an array class, and the declaring class
568 // is java.lang.Object and the method is "clone", set the flags
569 // to public.
570 //
571 // We'll check for the method name first, as that's most likely
572 // to be false (so we'll short-circuit out of these tests).
573 if (sel_method->name() == vmSymbols::clone_name() &&
574 sel_klass == SystemDictionary::Object_klass() &&
575 resolved_klass->is_array_klass()) {
576 // We need to change "protected" to "public".
577 assert(flags.is_protected(), "clone not protected?");
578 jint new_flags = flags.as_int();
579 new_flags = new_flags & (~JVM_ACC_PROTECTED);
580 new_flags = new_flags | JVM_ACC_PUBLIC;
581 flags.set_flags(new_flags);
582 }
583 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
584
585 bool can_access = Reflection::verify_member_access(ref_klass,
586 resolved_klass,
587 sel_klass,
588 flags,
589 true, false, CHECK);
590 // Any existing exceptions that may have been thrown
591 // have been allowed to propagate.
592 if (!can_access) {
593 ResourceMark rm(THREAD);
594 stringStream ss;
595 bool same_module = (sel_klass->module() == ref_klass->module());
596 ss.print("class %s tried to access %s%s%smethod '%s' (%s%s%s)",
597 ref_klass->external_name(),
598 sel_method->is_abstract() ? "abstract " : "",
599 sel_method->is_protected() ? "protected " : "",
600 sel_method->is_private() ? "private " : "",
601 sel_method->external_name(),
602 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
603 (same_module) ? "" : "; ",
604 (same_module) ? "" : sel_klass->class_in_module_of_loader()
605 );
606
607 // For private access see if there was a problem with nest host
608 // resolution, and if so report that as part of the message.
609 if (sel_method->is_private()) {
610 print_nest_host_error_on(&ss, ref_klass, sel_klass, THREAD);
611 }
612
613 Exceptions::fthrow(THREAD_AND_LOCATION,
614 vmSymbols::java_lang_IllegalAccessError(),
615 "%s",
616 ss.as_string()
617 );
618 return;
619 }
620 }
621
622 Method* LinkResolver::resolve_method_statically(Bytecodes::Code code,
623 const constantPoolHandle& pool, int index, TRAPS) {
624 // This method is used only
625 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
626 // and
627 // (2) in Bytecode_invoke::static_target
628 // It appears to fail when applied to an invokeinterface call site.
629 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
630 // resolve klass
631 if (code == Bytecodes::_invokedynamic) {
632 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
633 Symbol* method_name = vmSymbols::invoke_name();
634 Symbol* method_signature = pool->signature_ref_at(index);
635 Klass* current_klass = pool->pool_holder();
636 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
637 return resolve_method(link_info, code, THREAD);
638 }
639
640 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
641 Klass* resolved_klass = link_info.resolved_klass();
642
643 if (pool->has_preresolution()
644 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
645 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
646 Method* result = ConstantPool::method_at_if_loaded(pool, index);
647 if (result != NULL) {
648 return result;
649 }
650 }
651
652 if (code == Bytecodes::_invokeinterface) {
653 return resolve_interface_method(link_info, code, THREAD);
654 } else if (code == Bytecodes::_invokevirtual) {
655 return resolve_method(link_info, code, THREAD);
656 } else if (!resolved_klass->is_interface()) {
657 return resolve_method(link_info, code, THREAD);
658 } else {
659 return resolve_interface_method(link_info, code, THREAD);
660 }
661 }
662
663 // Check and print a loader constraint violation message for method or interface method
664 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
665 const methodHandle& resolved_method,
666 const char* method_type, TRAPS) {
667 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
668 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
669
670 ResourceMark rm(THREAD);
671 Symbol* failed_type_symbol =
672 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
673 resolved_loader, true, CHECK);
674 if (failed_type_symbol != NULL) {
675 Klass* current_class = link_info.current_klass();
676 ClassLoaderData* current_loader_data = current_class->class_loader_data();
677 assert(current_loader_data != NULL, "current class has no class loader data");
678 Klass* resolved_method_class = resolved_method->method_holder();
679 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
680 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
681
682 stringStream ss;
683 ss.print("loader constraint violation: when resolving %s '", method_type);
684 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
685 ss.print("' the class loader %s of the current class, %s,"
686 " and the class loader %s for the method's defining class, %s, have"
687 " different Class objects for the type %s used in the signature (%s; %s)",
688 current_loader_data->loader_name_and_id(),
689 current_class->name()->as_C_string(),
690 target_loader_data->loader_name_and_id(),
691 resolved_method_class->name()->as_C_string(),
692 failed_type_symbol->as_C_string(),
693 current_class->class_in_module_of_loader(false, true),
694 resolved_method_class->class_in_module_of_loader(false, true));
695 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
696 }
697 }
698
699 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
700 Klass* current_klass,
701 Klass* sel_klass, TRAPS) {
702 Handle ref_loader(THREAD, current_klass->class_loader());
703 Handle sel_loader(THREAD, sel_klass->class_loader());
704
705 ResourceMark rm(THREAD); // needed for check_signature_loaders
706 Symbol* failed_type_symbol =
707 SystemDictionary::check_signature_loaders(sig,
708 ref_loader, sel_loader,
709 false,
710 CHECK);
711 if (failed_type_symbol != NULL) {
712 stringStream ss;
713 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
714
715 ss.print("loader constraint violation: when resolving field \"%s\" of type %s, "
716 "the class loader %s of the current class, %s, "
717 "and the class loader %s for the field's defining %s, %s, "
718 "have different Class objects for type %s (%s; %s)",
719 field->as_C_string(),
720 failed_type_name,
721 current_klass->class_loader_data()->loader_name_and_id(),
722 current_klass->external_name(),
723 sel_klass->class_loader_data()->loader_name_and_id(),
724 sel_klass->external_kind(),
725 sel_klass->external_name(),
726 failed_type_name,
727 current_klass->class_in_module_of_loader(false, true),
728 sel_klass->class_in_module_of_loader(false, true));
729 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
730 }
731 }
732
733 Method* LinkResolver::resolve_method(const LinkInfo& link_info,
734 Bytecodes::Code code, TRAPS) {
735
736 Handle nested_exception;
737 Klass* resolved_klass = link_info.resolved_klass();
738
739 // 1. For invokevirtual, cannot call an interface method
740 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
741 ResourceMark rm(THREAD);
742 char buf[200];
743 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
744 resolved_klass->external_name());
745 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
746 }
747
748 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
749 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
750 ResourceMark rm(THREAD);
751 stringStream ss;
752 ss.print("Method '");
753 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
754 ss.print("' must be Methodref constant");
755 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
756 }
757
758 // 3. lookup method in resolved klass and its super klasses
759 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
760
761 // 4. lookup method in all the interfaces implemented by the resolved klass
762 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
763 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
764
765 if (resolved_method.is_null()) {
766 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
767 Method* method = lookup_polymorphic_method(link_info, (Handle*)NULL, THREAD);
768 resolved_method = methodHandle(THREAD, method);
769 if (HAS_PENDING_EXCEPTION) {
770 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
771 CLEAR_PENDING_EXCEPTION;
772 }
773 }
774 }
775
776 // 5. method lookup failed
777 if (resolved_method.is_null()) {
778 ResourceMark rm(THREAD);
779 stringStream ss;
780 ss.print("'");
781 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
782 ss.print("'");
783 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
784 ss.as_string(), nested_exception, NULL);
785 }
786
787 // 6. access checks, access checking may be turned off when calling from within the VM.
788 Klass* current_klass = link_info.current_klass();
789 if (link_info.check_access()) {
790 assert(current_klass != NULL , "current_klass should not be null");
791
792 // check if method can be accessed by the referring class
793 check_method_accessability(current_klass,
794 resolved_klass,
795 resolved_method->method_holder(),
796 resolved_method,
797 CHECK_NULL);
798
799 // check loader constraints
800 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
801 }
802
803 return resolved_method();
804 }
805
806 static void trace_method_resolution(const char* prefix,
807 Klass* klass,
808 Klass* resolved_klass,
809 Method* method,
810 bool logitables,
811 int index = -1) {
812 #ifndef PRODUCT
813 ResourceMark rm;
814 Log(itables) logi;
815 LogStream lsi(logi.trace());
816 Log(vtables) logv;
817 LogStream lsv(logv.trace());
818 outputStream* st;
819 if (logitables) {
820 st = &lsi;
821 } else {
822 st = &lsv;
823 }
824 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
825 prefix,
826 (klass == NULL ? "<NULL>" : klass->internal_name()),
827 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
828 Method::name_and_sig_as_C_string(resolved_klass,
829 method->name(),
830 method->signature()),
831 method->method_holder()->internal_name());
832 method->print_linkage_flags(st);
833 if (index != -1) {
834 st->print("vtable_index:%d", index);
835 }
836 st->cr();
837 #endif // PRODUCT
838 }
839
840 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
841 Method* LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
842
843 Klass* resolved_klass = link_info.resolved_klass();
844
845 // check if klass is interface
846 if (!resolved_klass->is_interface()) {
847 ResourceMark rm(THREAD);
848 char buf[200];
849 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
850 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
851 }
852
853 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
854 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
855 ResourceMark rm(THREAD);
856 stringStream ss;
857 ss.print("Method '");
858 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
859 ss.print("' must be InterfaceMethodref constant");
860 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
861 }
862
863 // lookup method in this interface or its super, java.lang.Object
864 // JDK8: also look for static methods
865 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
866
867 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
868 // lookup method in all the super-interfaces
869 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
870 }
871
872 if (resolved_method.is_null()) {
873 // no method found
874 ResourceMark rm(THREAD);
875 stringStream ss;
876 ss.print("'");
877 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
878 ss.print("'");
879 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
880 }
881
882 if (link_info.check_access()) {
883 // JDK8 adds non-public interface methods, and accessability check requirement
884 Klass* current_klass = link_info.current_klass();
885
886 assert(current_klass != NULL , "current_klass should not be null");
887
888 // check if method can be accessed by the referring class
889 check_method_accessability(current_klass,
890 resolved_klass,
891 resolved_method->method_holder(),
892 resolved_method,
893 CHECK_NULL);
894
895 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
896 }
897
898 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
899 ResourceMark rm(THREAD);
900 stringStream ss;
901 ss.print("Expected instance not static method '");
902 Method::print_external_name(&ss, resolved_klass,
903 resolved_method->name(), resolved_method->signature());
904 ss.print("'");
905 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
906 }
907
908 if (log_develop_is_enabled(Trace, itables)) {
909 char buf[200];
910 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
911 Bytecodes::name(code));
912 trace_method_resolution(buf, link_info.current_klass(), resolved_klass, resolved_method(), true);
913 }
914
915 return resolved_method();
916 }
917
918 //------------------------------------------------------------------------------------------------------------------------
919 // Field resolution
920
921 void LinkResolver::check_field_accessability(Klass* ref_klass,
922 Klass* resolved_klass,
923 Klass* sel_klass,
924 const fieldDescriptor& fd,
925 TRAPS) {
926 bool can_access = Reflection::verify_member_access(ref_klass,
927 resolved_klass,
928 sel_klass,
929 fd.access_flags(),
930 true, false, CHECK);
931 // Any existing exceptions that may have been thrown, for example LinkageErrors
932 // from nest-host resolution, have been allowed to propagate.
933 if (!can_access) {
934 bool same_module = (sel_klass->module() == ref_klass->module());
935 ResourceMark rm(THREAD);
936 stringStream ss;
937 ss.print("class %s tried to access %s%sfield %s.%s (%s%s%s)",
938 ref_klass->external_name(),
939 fd.is_protected() ? "protected " : "",
940 fd.is_private() ? "private " : "",
941 sel_klass->external_name(),
942 fd.name()->as_C_string(),
943 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
944 (same_module) ? "" : "; ",
945 (same_module) ? "" : sel_klass->class_in_module_of_loader()
946 );
947 // For private access see if there was a problem with nest host
948 // resolution, and if so report that as part of the message.
949 if (fd.is_private()) {
950 print_nest_host_error_on(&ss, ref_klass, sel_klass, THREAD);
951 }
952 Exceptions::fthrow(THREAD_AND_LOCATION,
953 vmSymbols::java_lang_IllegalAccessError(),
954 "%s",
955 ss.as_string()
956 );
957 return;
958 }
959 }
960
961 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
962 LinkInfo link_info(pool, index, method, CHECK);
963 resolve_field(fd, link_info, byte, true, CHECK);
964 }
965
966 void LinkResolver::resolve_field(fieldDescriptor& fd,
967 const LinkInfo& link_info,
968 Bytecodes::Code byte, bool initialize_class,
969 TRAPS) {
970 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
971 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
972 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
973 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
974
975 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
976 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
977 // Check if there's a resolved klass containing the field
978 Klass* resolved_klass = link_info.resolved_klass();
979 Symbol* field = link_info.name();
980 Symbol* sig = link_info.signature();
981
982 if (resolved_klass == NULL) {
983 ResourceMark rm(THREAD);
984 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
985 }
986
987 // Resolve instance field
988 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
989 // check if field exists; i.e., if a klass containing the field def has been selected
990 if (sel_klass == NULL) {
991 ResourceMark rm(THREAD);
992 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
993 }
994
995 // Access checking may be turned off when calling from within the VM.
996 Klass* current_klass = link_info.current_klass();
997 if (link_info.check_access()) {
998
999 // check access
1000 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
1001
1002 // check for errors
1003 if (is_static != fd.is_static()) {
1004 ResourceMark rm(THREAD);
1005 char msg[200];
1006 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
1007 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
1008 }
1009
1010 // A final field can be modified only
1011 // (1) by methods declared in the class declaring the field and
1012 // (2) by the <clinit> method (in case of a static field)
1013 // or by the <init> method (in case of an instance field).
1014 if (is_put && fd.access_flags().is_final()) {
1015
1016 if (sel_klass != current_klass) {
1017 ResourceMark rm(THREAD);
1018 stringStream ss;
1019 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1020 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1021 current_klass->external_name());
1022 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1023 }
1024
1025 if (fd.constants()->pool_holder()->major_version() >= 53) {
1026 Method* m = link_info.current_method();
1027 assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
1028 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1029 fd.is_static() &&
1030 !m->is_static_initializer());
1031 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1032 !fd.is_static() &&
1033 !m->is_object_initializer());
1034
1035 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1036 ResourceMark rm(THREAD);
1037 stringStream ss;
1038 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1039 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1040 m->name()->as_C_string(),
1041 is_static ? "<clinit>" : "<init>");
1042 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1043 }
1044 }
1045 }
1046
1047 // initialize resolved_klass if necessary
1048 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1049 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1050 //
1051 // note 2: we don't want to force initialization if we are just checking
1052 // if the field access is legal; e.g., during compilation
1053 if (is_static && initialize_class) {
1054 sel_klass->initialize(CHECK);
1055 }
1056 }
1057
1058 if ((sel_klass != current_klass) && (current_klass != NULL)) {
1059 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1060 }
1061
1062 // return information. note that the klass is set to the actual klass containing the
1063 // field, otherwise access of static fields in superclasses will not work.
1064 }
1065
1066
1067 //------------------------------------------------------------------------------------------------------------------------
1068 // Invoke resolution
1069 //
1070 // Naming conventions:
1071 //
1072 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1073 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1074 // resolved_klass the specified klass (i.e., specified via constant pool index)
1075 // recv_klass the receiver klass
1076
1077
1078 void LinkResolver::resolve_static_call(CallInfo& result,
1079 const LinkInfo& link_info,
1080 bool initialize_class, TRAPS) {
1081 Method* resolved_method = linktime_resolve_static_method(link_info, CHECK);
1082
1083 // The resolved class can change as a result of this resolution.
1084 Klass* resolved_klass = resolved_method->method_holder();
1085
1086 // Initialize klass (this should only happen if everything is ok)
1087 if (initialize_class && resolved_klass->should_be_initialized()) {
1088 resolved_klass->initialize(CHECK);
1089 // Use updated LinkInfo to reresolve with resolved method holder
1090 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1091 link_info.current_klass(),
1092 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1093 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1094 }
1095
1096 // setup result
1097 result.set_static(resolved_klass, methodHandle(THREAD, resolved_method), CHECK);
1098 }
1099
1100 // throws linktime exceptions
1101 Method* LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1102
1103 Klass* resolved_klass = link_info.resolved_klass();
1104 Method* resolved_method;
1105 if (!resolved_klass->is_interface()) {
1106 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1107 } else {
1108 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1109 }
1110 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1111
1112 // check if static
1113 if (!resolved_method->is_static()) {
1114 ResourceMark rm(THREAD);
1115 stringStream ss;
1116 ss.print("Expected static method '");
1117 resolved_method->print_external_name(&ss);
1118 ss.print("'");
1119 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1120 }
1121 return resolved_method;
1122 }
1123
1124
1125 void LinkResolver::resolve_special_call(CallInfo& result,
1126 Handle recv,
1127 const LinkInfo& link_info,
1128 TRAPS) {
1129 Method* resolved_method = linktime_resolve_special_method(link_info, CHECK);
1130 runtime_resolve_special_method(result, link_info, methodHandle(THREAD, resolved_method), recv, CHECK);
1131 }
1132
1133 // throws linktime exceptions
1134 Method* LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, TRAPS) {
1135
1136 // Invokespecial is called for multiple special reasons:
1137 // <init>
1138 // local private method invocation, for classes and interfaces
1139 // superclass.method, which can also resolve to a default method
1140 // and the selected method is recalculated relative to the direct superclass
1141 // superinterface.method, which explicitly does not check shadowing
1142 Klass* resolved_klass = link_info.resolved_klass();
1143 Method* resolved_method;
1144
1145 if (!resolved_klass->is_interface()) {
1146 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1147 } else {
1148 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1149 }
1150
1151 // check if method name is <init>, that it is found in same klass as static type
1152 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1153 resolved_method->method_holder() != resolved_klass) {
1154 ResourceMark rm(THREAD);
1155 stringStream ss;
1156 ss.print("%s: method '", resolved_klass->external_name());
1157 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1158 ss.print(" %s(", resolved_method->name()->as_C_string());
1159 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1160 ss.print(")' not found");
1161 Exceptions::fthrow(
1162 THREAD_AND_LOCATION,
1163 vmSymbols::java_lang_NoSuchMethodError(),
1164 "%s", ss.as_string());
1165 return NULL;
1166 }
1167
1168 // ensure that invokespecial's interface method reference is in
1169 // a direct superinterface, not an indirect superinterface
1170 Klass* current_klass = link_info.current_klass();
1171 if (current_klass != NULL && resolved_klass->is_interface()) {
1172 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1173 InstanceKlass *klass_to_check = !ck->is_unsafe_anonymous() ?
1174 ck :
1175 ck->unsafe_anonymous_host();
1176 // Disable verification for the dynamically-generated reflection bytecodes.
1177 bool is_reflect = klass_to_check->is_subclass_of(
1178 SystemDictionary::reflect_MagicAccessorImpl_klass());
1179
1180 if (!is_reflect &&
1181 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1182 ResourceMark rm(THREAD);
1183 stringStream ss;
1184 ss.print("Interface method reference: '");
1185 resolved_method->print_external_name(&ss);
1186 ss.print("', is in an indirect superinterface of %s",
1187 current_klass->external_name());
1188 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1189 }
1190 }
1191
1192 // check if not static
1193 if (resolved_method->is_static()) {
1194 ResourceMark rm(THREAD);
1195 stringStream ss;
1196 ss.print("Expecting non-static method '");
1197 resolved_method->print_external_name(&ss);
1198 ss.print("'");
1199 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1200 }
1201
1202 if (log_develop_is_enabled(Trace, itables)) {
1203 trace_method_resolution("invokespecial resolved method: caller-class:",
1204 current_klass, resolved_klass, resolved_method, true);
1205 }
1206
1207 return resolved_method;
1208 }
1209
1210 // throws runtime exceptions
1211 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1212 const LinkInfo& link_info,
1213 const methodHandle& resolved_method,
1214 Handle recv, TRAPS) {
1215
1216 Klass* resolved_klass = link_info.resolved_klass();
1217
1218 // resolved method is selected method unless we have an old-style lookup
1219 // for a superclass method
1220 // Invokespecial for a superinterface, resolved method is selected method,
1221 // no checks for shadowing
1222 methodHandle sel_method(THREAD, resolved_method());
1223
1224 if (link_info.check_access() &&
1225 // check if the method is not <init>
1226 resolved_method->name() != vmSymbols::object_initializer_name()) {
1227
1228 Klass* current_klass = link_info.current_klass();
1229
1230 // Check if the class of the resolved_klass is a superclass
1231 // (not supertype in order to exclude interface classes) of the current class.
1232 // This check is not performed for super.invoke for interface methods
1233 // in super interfaces.
1234 if (current_klass->is_subclass_of(resolved_klass) &&
1235 current_klass != resolved_klass) {
1236 // Lookup super method
1237 Klass* super_klass = current_klass->super();
1238 Method* instance_method = lookup_instance_method_in_klasses(super_klass,
1239 resolved_method->name(),
1240 resolved_method->signature(),
1241 Klass::find_private, CHECK);
1242 sel_method = methodHandle(THREAD, instance_method);
1243
1244 // check if found
1245 if (sel_method.is_null()) {
1246 ResourceMark rm(THREAD);
1247 stringStream ss;
1248 ss.print("'");
1249 resolved_method->print_external_name(&ss);
1250 ss.print("'");
1251 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1252 // check loader constraints if found a different method
1253 } else if (sel_method() != resolved_method()) {
1254 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1255 }
1256 }
1257
1258 // Check that the class of objectref (the receiver) is the current class or interface,
1259 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1260 // throws IllegalAccessError.
1261 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1262 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1263 // a class. If the sender is an interface, the check has to be performed at runtime.
1264 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1265 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1266 if (sender->is_interface() && recv.not_null()) {
1267 Klass* receiver_klass = recv->klass();
1268 if (!receiver_klass->is_subtype_of(sender)) {
1269 ResourceMark rm(THREAD);
1270 char buf[500];
1271 jio_snprintf(buf, sizeof(buf),
1272 "Receiver class %s must be the current class or a subtype of interface %s",
1273 receiver_klass->external_name(),
1274 sender->external_name());
1275 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1276 }
1277 }
1278 }
1279
1280 // check if not static
1281 if (sel_method->is_static()) {
1282 ResourceMark rm(THREAD);
1283 stringStream ss;
1284 ss.print("Expecting non-static method '");
1285 resolved_method->print_external_name(&ss);
1286 ss.print("'");
1287 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1288 }
1289
1290 // check if abstract
1291 if (sel_method->is_abstract()) {
1292 ResourceMark rm(THREAD);
1293 stringStream ss;
1294 ss.print("'");
1295 Method::print_external_name(&ss, resolved_klass, sel_method->name(), sel_method->signature());
1296 ss.print("'");
1297 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1298 }
1299
1300 if (log_develop_is_enabled(Trace, itables)) {
1301 trace_method_resolution("invokespecial selected method: resolved-class:",
1302 resolved_klass, resolved_klass, sel_method(), true);
1303 }
1304
1305 // setup result
1306 result.set_static(resolved_klass, sel_method, CHECK);
1307 }
1308
1309 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1310 const LinkInfo& link_info,
1311 bool check_null_and_abstract, TRAPS) {
1312 Method* resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1313 runtime_resolve_virtual_method(result, methodHandle(THREAD, resolved_method),
1314 link_info.resolved_klass(),
1315 recv, receiver_klass,
1316 check_null_and_abstract, CHECK);
1317 }
1318
1319 // throws linktime exceptions
1320 Method* LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1321 TRAPS) {
1322 // normal method resolution
1323 Method* resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1324
1325 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1326 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1327
1328 // check if private interface method
1329 Klass* resolved_klass = link_info.resolved_klass();
1330 Klass* current_klass = link_info.current_klass();
1331
1332 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1333 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1334 ResourceMark rm(THREAD);
1335 stringStream ss;
1336 ss.print("private interface method requires invokespecial, not invokevirtual: method '");
1337 resolved_method->print_external_name(&ss);
1338 ss.print("', caller-class: %s",
1339 (current_klass == NULL ? "<null>" : current_klass->internal_name()));
1340 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1341 }
1342
1343 // check if not static
1344 if (resolved_method->is_static()) {
1345 ResourceMark rm(THREAD);
1346 stringStream ss;
1347 ss.print("Expecting non-static method '");
1348 resolved_method->print_external_name(&ss);
1349 ss.print("'");
1350 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1351 }
1352
1353 if (log_develop_is_enabled(Trace, vtables)) {
1354 trace_method_resolution("invokevirtual resolved method: caller-class:",
1355 current_klass, resolved_klass, resolved_method, false);
1356 }
1357
1358 return resolved_method;
1359 }
1360
1361 // throws runtime exceptions
1362 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1363 const methodHandle& resolved_method,
1364 Klass* resolved_klass,
1365 Handle recv,
1366 Klass* recv_klass,
1367 bool check_null_and_abstract,
1368 TRAPS) {
1369
1370 // setup default return values
1371 int vtable_index = Method::invalid_vtable_index;
1372 methodHandle selected_method;
1373
1374 // runtime method resolution
1375 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1376 THROW(vmSymbols::java_lang_NullPointerException());
1377 }
1378
1379 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1380 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1381 // a missing receiver might result in a bogus lookup.
1382 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1383
1384 // do lookup based on receiver klass using the vtable index
1385 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1386 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1387 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1388
1389 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1390 } else {
1391 // at this point we are sure that resolved_method is virtual and not
1392 // a default or miranda method; therefore, it must have a valid vtable index.
1393 assert(!resolved_method->has_itable_index(), "");
1394 vtable_index = resolved_method->vtable_index();
1395 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1396 // methods, or for final methods. Private methods never appear in the vtable
1397 // and never override other methods. As an optimization, final methods are
1398 // never put in the vtable, unless they override an existing method.
1399 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1400 // resolved method, and it can never be changed by an override.
1401 if (vtable_index == Method::nonvirtual_vtable_index) {
1402 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1403 selected_method = resolved_method;
1404 } else {
1405 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1406 }
1407 }
1408
1409 // check if method exists
1410 if (selected_method.is_null()) {
1411 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1412 }
1413
1414 // check if abstract
1415 if (check_null_and_abstract && selected_method->is_abstract()) {
1416 // Pass arguments for generating a verbose error message.
1417 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1418 }
1419
1420 if (log_develop_is_enabled(Trace, vtables)) {
1421 trace_method_resolution("invokevirtual selected method: receiver-class:",
1422 recv_klass, resolved_klass, selected_method(),
1423 false, vtable_index);
1424 }
1425 // setup result
1426 result.set_virtual(resolved_klass, resolved_method, selected_method, vtable_index, CHECK);
1427 }
1428
1429 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1430 const LinkInfo& link_info,
1431 bool check_null_and_abstract, TRAPS) {
1432 // throws linktime exceptions
1433 Method* resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1434 methodHandle mh(THREAD, resolved_method);
1435 runtime_resolve_interface_method(result, mh, link_info.resolved_klass(),
1436 recv, recv_klass, check_null_and_abstract, CHECK);
1437 }
1438
1439 Method* LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1440 TRAPS) {
1441 // normal interface method resolution
1442 Method* resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1443 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1444 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1445
1446 return resolved_method;
1447 }
1448
1449 // throws runtime exceptions
1450 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1451 const methodHandle& resolved_method,
1452 Klass* resolved_klass,
1453 Handle recv,
1454 Klass* recv_klass,
1455 bool check_null_and_abstract, TRAPS) {
1456
1457 // check if receiver exists
1458 if (check_null_and_abstract && recv.is_null()) {
1459 THROW(vmSymbols::java_lang_NullPointerException());
1460 }
1461
1462 // check if receiver klass implements the resolved interface
1463 if (!recv_klass->is_subtype_of(resolved_klass)) {
1464 ResourceMark rm(THREAD);
1465 char buf[200];
1466 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1467 recv_klass->external_name(),
1468 resolved_klass->external_name());
1469 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1470 }
1471
1472 methodHandle selected_method = resolved_method;
1473
1474 // resolve the method in the receiver class, unless it is private
1475 if (!resolved_method()->is_private()) {
1476 // do lookup based on receiver klass
1477 // This search must match the linktime preparation search for itable initialization
1478 // to correctly enforce loader constraints for interface method inheritance.
1479 // Private methods are skipped as the resolved method was not private.
1480 Method* method = lookup_instance_method_in_klasses(recv_klass,
1481 resolved_method->name(),
1482 resolved_method->signature(),
1483 Klass::skip_private, CHECK);
1484 selected_method = methodHandle(THREAD, method);
1485
1486 if (selected_method.is_null() && !check_null_and_abstract) {
1487 // In theory this is a harmless placeholder value, but
1488 // in practice leaving in null affects the nsk default method tests.
1489 // This needs further study.
1490 selected_method = resolved_method;
1491 }
1492 // check if method exists
1493 if (selected_method.is_null()) {
1494 // Pass arguments for generating a verbose error message.
1495 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1496 }
1497 // check access
1498 // Throw Illegal Access Error if selected_method is not public.
1499 if (!selected_method->is_public()) {
1500 ResourceMark rm(THREAD);
1501 stringStream ss;
1502 ss.print("'");
1503 Method::print_external_name(&ss, recv_klass, selected_method->name(), selected_method->signature());
1504 ss.print("'");
1505 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1506 }
1507 // check if abstract
1508 if (check_null_and_abstract && selected_method->is_abstract()) {
1509 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1510 }
1511 }
1512
1513 if (log_develop_is_enabled(Trace, itables)) {
1514 trace_method_resolution("invokeinterface selected method: receiver-class:",
1515 recv_klass, resolved_klass, selected_method(), true);
1516 }
1517 // setup result
1518 if (resolved_method->has_vtable_index()) {
1519 int vtable_index = resolved_method->vtable_index();
1520 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1521 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1522 result.set_virtual(resolved_klass, resolved_method, selected_method, vtable_index, CHECK);
1523 } else if (resolved_method->has_itable_index()) {
1524 int itable_index = resolved_method()->itable_index();
1525 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1526 result.set_interface(resolved_klass, resolved_method, selected_method, itable_index, CHECK);
1527 } else {
1528 int index = resolved_method->vtable_index();
1529 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1530 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1531 assert(resolved_method()->is_private() ||
1532 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1533 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1534 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1535 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1536 result.set_virtual(resolved_klass, resolved_method, resolved_method, index, CHECK);
1537 }
1538 }
1539
1540
1541 Method* LinkResolver::linktime_resolve_interface_method_or_null(
1542 const LinkInfo& link_info) {
1543 EXCEPTION_MARK;
1544 Method* method_result = linktime_resolve_interface_method(link_info, THREAD);
1545 if (HAS_PENDING_EXCEPTION) {
1546 CLEAR_PENDING_EXCEPTION;
1547 return NULL;
1548 } else {
1549 return method_result;
1550 }
1551 }
1552
1553 Method* LinkResolver::linktime_resolve_virtual_method_or_null(
1554 const LinkInfo& link_info) {
1555 EXCEPTION_MARK;
1556 Method* method_result = linktime_resolve_virtual_method(link_info, THREAD);
1557 if (HAS_PENDING_EXCEPTION) {
1558 CLEAR_PENDING_EXCEPTION;
1559 return NULL;
1560 } else {
1561 return method_result;
1562 }
1563 }
1564
1565 Method* LinkResolver::resolve_virtual_call_or_null(
1566 Klass* receiver_klass,
1567 const LinkInfo& link_info) {
1568 EXCEPTION_MARK;
1569 CallInfo info;
1570 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1571 if (HAS_PENDING_EXCEPTION) {
1572 CLEAR_PENDING_EXCEPTION;
1573 return NULL;
1574 }
1575 return info.selected_method();
1576 }
1577
1578 Method* LinkResolver::resolve_interface_call_or_null(
1579 Klass* receiver_klass,
1580 const LinkInfo& link_info) {
1581 EXCEPTION_MARK;
1582 CallInfo info;
1583 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1584 if (HAS_PENDING_EXCEPTION) {
1585 CLEAR_PENDING_EXCEPTION;
1586 return NULL;
1587 }
1588 return info.selected_method();
1589 }
1590
1591 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1592 const LinkInfo& link_info) {
1593 EXCEPTION_MARK;
1594 CallInfo info;
1595 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1596 /*check_null_or_abstract*/false, THREAD);
1597 if (HAS_PENDING_EXCEPTION) {
1598 CLEAR_PENDING_EXCEPTION;
1599 return Method::invalid_vtable_index;
1600 }
1601 return info.vtable_index();
1602 }
1603
1604 Method* LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1605 EXCEPTION_MARK;
1606 CallInfo info;
1607 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1608 if (HAS_PENDING_EXCEPTION) {
1609 CLEAR_PENDING_EXCEPTION;
1610 return NULL;
1611 }
1612 return info.selected_method();
1613 }
1614
1615 Method* LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1616 EXCEPTION_MARK;
1617 CallInfo info;
1618 resolve_special_call(info, Handle(), link_info, THREAD);
1619 if (HAS_PENDING_EXCEPTION) {
1620 CLEAR_PENDING_EXCEPTION;
1621 return NULL;
1622 }
1623 return info.selected_method();
1624 }
1625
1626
1627
1628 //------------------------------------------------------------------------------------------------------------------------
1629 // ConstantPool entries
1630
1631 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1632 switch (byte) {
1633 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1634 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1635 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1636 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1637 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1638 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1639 default : break;
1640 }
1641 return;
1642 }
1643
1644 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1645 const methodHandle& attached_method,
1646 Bytecodes::Code byte, TRAPS) {
1647 Klass* defc = attached_method->method_holder();
1648 Symbol* name = attached_method->name();
1649 Symbol* type = attached_method->signature();
1650 LinkInfo link_info(defc, name, type);
1651 switch(byte) {
1652 case Bytecodes::_invokevirtual:
1653 resolve_virtual_call(result, recv, recv->klass(), link_info,
1654 /*check_null_and_abstract=*/true, CHECK);
1655 break;
1656 case Bytecodes::_invokeinterface:
1657 resolve_interface_call(result, recv, recv->klass(), link_info,
1658 /*check_null_and_abstract=*/true, CHECK);
1659 break;
1660 case Bytecodes::_invokestatic:
1661 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1662 break;
1663 case Bytecodes::_invokespecial:
1664 resolve_special_call(result, recv, link_info, CHECK);
1665 break;
1666 default:
1667 fatal("bad call: %s", Bytecodes::name(byte));
1668 break;
1669 }
1670 }
1671
1672 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1673 LinkInfo link_info(pool, index, CHECK);
1674 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1675 }
1676
1677
1678 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1679 const constantPoolHandle& pool, int index, TRAPS) {
1680 LinkInfo link_info(pool, index, CHECK);
1681 resolve_special_call(result, recv, link_info, CHECK);
1682 }
1683
1684
1685 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1686 const constantPoolHandle& pool, int index,
1687 TRAPS) {
1688
1689 LinkInfo link_info(pool, index, CHECK);
1690 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1691 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1692 }
1693
1694
1695 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1696 LinkInfo link_info(pool, index, CHECK);
1697 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1698 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1699 }
1700
1701
1702 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1703 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1704 LinkInfo link_info(pool, index, CHECK);
1705 if (TraceMethodHandles) {
1706 ResourceMark rm(THREAD);
1707 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1708 link_info.signature()->as_C_string());
1709 }
1710 resolve_handle_call(result, link_info, CHECK);
1711 }
1712
1713 void LinkResolver::resolve_handle_call(CallInfo& result,
1714 const LinkInfo& link_info,
1715 TRAPS) {
1716 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1717 Klass* resolved_klass = link_info.resolved_klass();
1718 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1719 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1720 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1721 Handle resolved_appendix;
1722 Method* resolved_method = lookup_polymorphic_method(link_info, &resolved_appendix, CHECK);
1723 result.set_handle(resolved_klass, methodHandle(THREAD, resolved_method), resolved_appendix, CHECK);
1724 }
1725
1726 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int indy_index, TRAPS) {
1727 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(indy_index);
1728 int pool_index = cpce->constant_pool_index();
1729
1730 // Resolve the bootstrap specifier (BSM + optional arguments).
1731 BootstrapInfo bootstrap_specifier(pool, pool_index, indy_index);
1732
1733 // Check if CallSite has been bound already or failed already, and short circuit:
1734 {
1735 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1736 if (is_done) return;
1737 }
1738
1739 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1740 // reference to a method handle which will be the bootstrap method for a dynamic
1741 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1742 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1743 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1744 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1745 // this bootstrap method will encounter the resolution of MethodHandleInError.
1746
1747 resolve_dynamic_call(result, bootstrap_specifier, CHECK);
1748
1749 if (TraceMethodHandles) {
1750 bootstrap_specifier.print_msg_on(tty, "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(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 }