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_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
68 }
69
70
71 void CallInfo::set_interface(Klass* resolved_klass,
72 Klass* selected_klass,
73 const methodHandle& resolved_method,
74 const methodHandle& selected_method,
75 int itable_index, TRAPS) {
76 // This is only called for interface methods. If the resolved_method
77 // comes from java/lang/Object, it can be the subject of a virtual call, so
78 // we should pick the vtable index from the resolved method.
79 // In that case, the caller must call set_virtual instead of set_interface.
80 assert(resolved_method->method_holder()->is_interface(), "");
81 assert(itable_index == resolved_method()->itable_index(), "");
82 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
83 }
84
85 void CallInfo::set_virtual(Klass* resolved_klass,
86 Klass* selected_klass,
87 const methodHandle& resolved_method,
88 const methodHandle& selected_method,
89 int vtable_index, TRAPS) {
90 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
91 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
92 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
93 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
94 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
95 }
96
97 void CallInfo::set_handle(const methodHandle& resolved_method,
98 Handle resolved_appendix, TRAPS) {
99 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, CHECK);
100 }
101
102 void CallInfo::set_handle(Klass* resolved_klass,
103 const methodHandle& resolved_method,
104 Handle resolved_appendix, TRAPS) {
105 guarantee(resolved_method.not_null(), "resolved method is null");
106 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
107 resolved_method->is_compiled_lambda_form(),
108 "linkMethod must return one of these");
109 int vtable_index = Method::nonvirtual_vtable_index;
110 assert(!resolved_method->has_vtable_index(), "");
111 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
112 _resolved_appendix = resolved_appendix;
113 }
114
115 void CallInfo::set_common(Klass* resolved_klass,
116 Klass* selected_klass,
117 const methodHandle& resolved_method,
118 const methodHandle& selected_method,
119 CallKind kind,
120 int index,
121 TRAPS) {
122 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
123 _resolved_klass = resolved_klass;
124 _selected_klass = selected_klass;
125 _resolved_method = resolved_method;
126 _selected_method = selected_method;
127 _call_kind = kind;
128 _call_index = index;
129 _resolved_appendix = Handle();
130 DEBUG_ONLY(verify()); // verify before making side effects
131
132 CompilationPolicy::compile_if_required(selected_method, THREAD);
133 }
134
135 // utility query for unreflecting a method
136 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
137 Klass* resolved_method_holder = resolved_method->method_holder();
138 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
139 resolved_klass = resolved_method_holder;
140 }
141 _resolved_klass = resolved_klass;
142 _selected_klass = resolved_klass;
143 _resolved_method = methodHandle(THREAD, resolved_method);
144 _selected_method = methodHandle(THREAD, resolved_method);
145 // classify:
146 CallKind kind = CallInfo::unknown_kind;
147 int index = resolved_method->vtable_index();
148 if (resolved_method->can_be_statically_bound()) {
149 kind = CallInfo::direct_call;
150 } else if (!resolved_method_holder->is_interface()) {
151 // Could be an Object method inherited into an interface, but still a vtable call.
152 kind = CallInfo::vtable_call;
153 } else if (!resolved_klass->is_interface()) {
154 // A default or miranda method. Compute the vtable index.
155 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
156 _resolved_method);
157 assert(index >= 0 , "we should have valid vtable index at this point");
158
159 kind = CallInfo::vtable_call;
160 } else if (resolved_method->has_vtable_index()) {
161 // Can occur if an interface redeclares a method of Object.
162
163 #ifdef ASSERT
164 // Ensure that this is really the case.
165 Klass* object_klass = SystemDictionary::Object_klass();
166 Method * object_resolved_method = object_klass->vtable().method_at(index);
167 assert(object_resolved_method->name() == resolved_method->name(),
168 "Object and interface method names should match at vtable index %d, %s != %s",
169 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
170 assert(object_resolved_method->signature() == resolved_method->signature(),
171 "Object and interface method signatures should match at vtable index %d, %s != %s",
172 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
173 #endif // ASSERT
174
175 kind = CallInfo::vtable_call;
176 } else {
177 // A regular interface call.
178 kind = CallInfo::itable_call;
179 index = resolved_method->itable_index();
180 }
181 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
182 _call_kind = kind;
183 _call_index = index;
184 _resolved_appendix = Handle();
185 // Find or create a ResolvedMethod instance for this Method*
186 set_resolved_method_name(CHECK);
187
188 DEBUG_ONLY(verify());
189 }
190
191 void CallInfo::set_resolved_method_name(TRAPS) {
192 assert(_resolved_method() != NULL, "Should already have a Method*");
193 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(_resolved_method, CHECK);
194 _resolved_method_name = Handle(THREAD, rmethod_name);
195 }
196
197 #ifdef ASSERT
198 void CallInfo::verify() {
199 switch (call_kind()) { // the meaning and allowed value of index depends on kind
200 case CallInfo::direct_call:
201 if (_call_index == Method::nonvirtual_vtable_index) break;
202 // else fall through to check vtable index:
203 case CallInfo::vtable_call:
204 assert(resolved_klass()->verify_vtable_index(_call_index), "");
205 break;
206 case CallInfo::itable_call:
207 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
208 break;
209 case CallInfo::unknown_kind:
210 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
211 break;
212 default:
213 fatal("Unexpected call kind %d", call_kind());
214 }
215 }
216 #endif // ASSERT
217
218 #ifndef PRODUCT
219 void CallInfo::print() {
220 ResourceMark rm;
221 const char* kindstr;
222 switch (_call_kind) {
223 case direct_call: kindstr = "direct"; break;
224 case vtable_call: kindstr = "vtable"; break;
225 case itable_call: kindstr = "itable"; break;
226 default : kindstr = "unknown"; break;
227 }
228 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
229 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
230 }
231 #endif
232
233 //------------------------------------------------------------------------------------------------------------------------
234 // Implementation of LinkInfo
235
236 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
237 // resolve klass
238 _resolved_klass = pool->klass_ref_at(index, CHECK);
239
240 // Get name, signature, and static klass
241 _name = pool->name_ref_at(index);
242 _signature = pool->signature_ref_at(index);
243 _tag = pool->tag_ref_at(index);
244 _current_klass = pool->pool_holder();
245 _current_method = current_method;
246
247 // Coming from the constant pool always checks access
248 _check_access = true;
249 }
250
251 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
252 // resolve klass
253 _resolved_klass = pool->klass_ref_at(index, CHECK);
254
255 // Get name, signature, and static klass
256 _name = pool->name_ref_at(index);
257 _signature = pool->signature_ref_at(index);
258 _tag = pool->tag_ref_at(index);
259 _current_klass = pool->pool_holder();
260 _current_method = methodHandle();
261
262 // Coming from the constant pool always checks access
263 _check_access = true;
264 }
265
266 #ifndef PRODUCT
267 void LinkInfo::print() {
268 ResourceMark rm;
269 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
270 _resolved_klass->name()->as_C_string(),
271 _name->as_C_string(),
272 _signature->as_C_string(),
273 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
274 _check_access ? "true" : "false");
275 }
276 #endif // PRODUCT
277 //------------------------------------------------------------------------------------------------------------------------
278 // Klass resolution
279
280 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
281 bool fold_type_to_class, TRAPS) {
282 Klass* base_klass = sel_klass;
283 if (fold_type_to_class) {
284 if (sel_klass->is_objArray_klass()) {
285 base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
286 }
287 // The element type could be a typeArray - we only need the access
288 // check if it is a reference to another class.
289 if (!base_klass->is_instance_klass()) {
290 return; // no relevant check to do
291 }
292 }
293 Reflection::VerifyClassAccessResults vca_result =
294 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
295 if (vca_result != Reflection::ACCESS_OK) {
296 ResourceMark rm(THREAD);
297 char* msg = Reflection::verify_class_access_msg(ref_klass,
298 InstanceKlass::cast(base_klass),
299 vca_result);
300 bool same_module = (base_klass->module() == ref_klass->module());
301 if (msg == NULL) {
302 Exceptions::fthrow(
303 THREAD_AND_LOCATION,
304 vmSymbols::java_lang_IllegalAccessError(),
305 "failed to access class %s from class %s (%s%s%s)",
306 base_klass->external_name(),
307 ref_klass->external_name(),
308 (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(),
309 (same_module) ? "" : "; ",
310 (same_module) ? "" : ref_klass->class_in_module_of_loader());
311 } else {
312 // Use module specific message returned by verify_class_access_msg().
313 Exceptions::fthrow(
314 THREAD_AND_LOCATION,
315 vmSymbols::java_lang_IllegalAccessError(),
316 "%s", msg);
317 }
318 }
319 }
320
321 //------------------------------------------------------------------------------------------------------------------------
322 // Method resolution
323 //
324 // According to JVM spec. $5.4.3c & $5.4.3d
325
326 // Look up method in klasses, including static methods
327 // Then look up local default methods
328 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
329 bool checkpolymorphism,
330 bool in_imethod_resolve) {
331 NoSafepointVerifier nsv; // Method* returned may not be reclaimed
332
333 Klass* klass = link_info.resolved_klass();
334 Symbol* name = link_info.name();
335 Symbol* signature = link_info.signature();
336
337 // Ignore overpasses so statics can be found during resolution
338 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
339
340 if (klass->is_array_klass()) {
341 // Only consider klass and super klass for arrays
342 return result;
343 }
344
345 InstanceKlass* ik = InstanceKlass::cast(klass);
346
347 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
348 // ignore static and non-public methods of java.lang.Object,
349 // like clone, finalize, registerNatives.
350 if (in_imethod_resolve &&
351 result != NULL &&
352 ik->is_interface() &&
353 (result->is_static() || !result->is_public()) &&
354 result->method_holder() == SystemDictionary::Object_klass()) {
355 result = NULL;
356 }
357
358 // Before considering default methods, check for an overpass in the
359 // current class if a method has not been found.
360 if (result == NULL) {
361 result = ik->find_method(name, signature);
362 }
363
364 if (result == NULL) {
365 Array<Method*>* default_methods = ik->default_methods();
366 if (default_methods != NULL) {
367 result = InstanceKlass::find_method(default_methods, name, signature);
368 }
369 }
370
371 if (checkpolymorphism && result != NULL) {
372 vmIntrinsics::ID iid = result->intrinsic_id();
373 if (MethodHandles::is_signature_polymorphic(iid)) {
374 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
375 return NULL;
376 }
377 }
378 return result;
379 }
380
381 // returns first instance method
382 // Looks up method in classes, then looks up local default methods
383 Method* LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
384 Symbol* name,
385 Symbol* signature,
386 Klass::PrivateLookupMode private_mode, TRAPS) {
387 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
388
389 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
390 Klass* super_klass = result->method_holder()->super();
391 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
392 }
393
394 if (klass->is_array_klass()) {
395 // Only consider klass and super klass for arrays
396 return result;
397 }
398
399 if (result == NULL) {
400 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
401 if (default_methods != NULL) {
402 result = InstanceKlass::find_method(default_methods, name, signature);
403 assert(result == NULL || !result->is_static(), "static defaults not allowed");
404 }
405 }
406 return result;
407 }
408
409 int LinkResolver::vtable_index_of_interface_method(Klass* klass,
410 const methodHandle& resolved_method) {
411
412 int vtable_index = Method::invalid_vtable_index;
413 Symbol* name = resolved_method->name();
414 Symbol* signature = resolved_method->signature();
415 InstanceKlass* ik = InstanceKlass::cast(klass);
416
417 // First check in default method array
418 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
419 int index = InstanceKlass::find_method_index(ik->default_methods(),
420 name, signature, Klass::find_overpass,
421 Klass::find_static, Klass::find_private);
422 if (index >= 0 ) {
423 vtable_index = ik->default_vtable_indices()->at(index);
424 }
425 }
426 if (vtable_index == Method::invalid_vtable_index) {
427 // get vtable_index for miranda methods
428 klassVtable vt = ik->vtable();
429 vtable_index = vt.index_of_miranda(name, signature);
430 }
431 return vtable_index;
432 }
433
434 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
435 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());
436
437 // Specify 'true' in order to skip default methods when searching the
438 // interfaces. Function lookup_method_in_klasses() already looked for
439 // the method in the default methods table.
440 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
441 }
442
443 Method* LinkResolver::lookup_polymorphic_method(const LinkInfo& link_info,
444 Handle *appendix_result_or_null,
445 TRAPS) {
446 Klass* klass = link_info.resolved_klass();
447 Symbol* name = link_info.name();
448 Symbol* full_signature = link_info.signature();
449
450 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
451 if (TraceMethodHandles) {
452 ResourceMark rm(THREAD);
453 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
454 vmIntrinsics::name_at(iid), klass->external_name(),
455 name->as_C_string(), full_signature->as_C_string());
456 }
457 if ((klass == SystemDictionary::MethodHandle_klass() ||
458 klass == SystemDictionary::VarHandle_klass()) &&
459 iid != vmIntrinsics::_none) {
460 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
461 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
462 // Do not erase last argument type (MemberName) if it is a static linkTo method.
463 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
464 TempNewSymbol basic_signature =
465 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
466 if (TraceMethodHandles) {
467 ResourceMark rm(THREAD);
468 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
469 name->as_C_string(),
470 full_signature->as_C_string(),
471 basic_signature->as_C_string());
472 }
473 Method* result = SystemDictionary::find_method_handle_intrinsic(iid,
474 basic_signature,
475 CHECK_NULL);
476 if (result != NULL) {
477 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
478 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
479 assert(basic_signature == result->signature(), "predict the result signature");
480 if (TraceMethodHandles) {
481 ttyLocker ttyl;
482 tty->print("lookup_polymorphic_method => intrinsic ");
483 result->print_on(tty);
484 }
485 }
486 return result;
487 } else if (iid == vmIntrinsics::_invokeGeneric
488 && THREAD->can_call_java()
489 && appendix_result_or_null != NULL) {
490 // This is a method with type-checking semantics.
491 // We will ask Java code to spin an adapter method for it.
492 if (!MethodHandles::enabled()) {
493 // Make sure the Java part of the runtime has been booted up.
494 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
495 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
496 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
497 Handle(),
498 Handle(),
499 true,
500 CHECK_NULL);
501 }
502 }
503
504 Handle appendix;
505 Handle method_type;
506 Method* result = SystemDictionary::find_method_handle_invoker(
507 klass,
508 name,
509 full_signature,
510 link_info.current_klass(),
511 &appendix,
512 CHECK_NULL);
513 if (TraceMethodHandles) {
514 ttyLocker ttyl;
515 tty->print("lookup_polymorphic_method => (via Java) ");
516 result->print_on(tty);
517 tty->print(" lookup_polymorphic_method => appendix = ");
518 if (appendix.is_null()) tty->print_cr("(none)");
519 else appendix->print_on(tty);
520 }
521 if (result != NULL) {
522 #ifdef ASSERT
523 ResourceMark rm(THREAD);
524
525 TempNewSymbol basic_signature =
526 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
527 int actual_size_of_params = result->size_of_parameters();
528 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
529 // +1 for MethodHandle.this, +1 for trailing MethodType
530 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
531 if (appendix.not_null()) expected_size_of_params += 1;
532 if (actual_size_of_params != expected_size_of_params) {
533 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
534 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
535 result->print();
536 }
537 assert(actual_size_of_params == expected_size_of_params,
538 "%d != %d", actual_size_of_params, expected_size_of_params);
539 #endif //ASSERT
540
541 assert(appendix_result_or_null != NULL, "");
542 (*appendix_result_or_null) = appendix;
543 }
544 return result;
545 }
546 }
547 return NULL;
548 }
549
550 static void print_nest_host_error_on(stringStream* ss, Klass* ref_klass, Klass* sel_klass, TRAPS) {
551 assert(ref_klass->is_instance_klass(), "must be");
552 assert(sel_klass->is_instance_klass(), "must be");
553 InstanceKlass* ref_ik = InstanceKlass::cast(ref_klass);
554 InstanceKlass* sel_ik = InstanceKlass::cast(sel_klass);
555 const char* nest_host_error_1 = ref_ik->nest_host_error(THREAD);
556 const char* nest_host_error_2 = sel_ik->nest_host_error(THREAD);
557 if (nest_host_error_1 != NULL || nest_host_error_2 != NULL) {
558 ss->print(", (%s%s%s)",
559 (nest_host_error_1 != NULL) ? nest_host_error_1 : "",
560 (nest_host_error_1 != NULL && nest_host_error_2 != NULL) ? ", " : "",
561 (nest_host_error_2 != NULL) ? nest_host_error_2 : "");
562 }
563 }
564
565 void LinkResolver::check_method_accessability(Klass* ref_klass,
566 Klass* resolved_klass,
567 Klass* sel_klass,
568 const methodHandle& sel_method,
569 TRAPS) {
570
571 AccessFlags flags = sel_method->access_flags();
572
573 // Special case: arrays always override "clone". JVMS 2.15.
574 // If the resolved klass is an array class, and the declaring class
575 // is java.lang.Object and the method is "clone", set the flags
576 // to public.
577 //
578 // We'll check for the method name first, as that's most likely
579 // to be false (so we'll short-circuit out of these tests).
580 if (sel_method->name() == vmSymbols::clone_name() &&
581 sel_klass == SystemDictionary::Object_klass() &&
582 resolved_klass->is_array_klass()) {
583 // We need to change "protected" to "public".
584 assert(flags.is_protected(), "clone not protected?");
585 jint new_flags = flags.as_int();
586 new_flags = new_flags & (~JVM_ACC_PROTECTED);
587 new_flags = new_flags | JVM_ACC_PUBLIC;
588 flags.set_flags(new_flags);
589 }
590 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
591
592 bool can_access = Reflection::verify_member_access(ref_klass,
593 resolved_klass,
594 sel_klass,
595 flags,
596 true, false, CHECK);
597 // Any existing exceptions that may have been thrown
598 // have been allowed to propagate.
599 if (!can_access) {
600 ResourceMark rm(THREAD);
601 stringStream ss;
602 bool same_module = (sel_klass->module() == ref_klass->module());
603 ss.print("class %s tried to access %s%s%smethod '%s' (%s%s%s)",
604 ref_klass->external_name(),
605 sel_method->is_abstract() ? "abstract " : "",
606 sel_method->is_protected() ? "protected " : "",
607 sel_method->is_private() ? "private " : "",
608 sel_method->external_name(),
609 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
610 (same_module) ? "" : "; ",
611 (same_module) ? "" : sel_klass->class_in_module_of_loader()
612 );
613
614 // For private access see if there was a problem with nest host
615 // resolution, and if so report that as part of the message.
616 if (sel_method->is_private()) {
617 print_nest_host_error_on(&ss, ref_klass, sel_klass, THREAD);
618 }
619
620 Exceptions::fthrow(THREAD_AND_LOCATION,
621 vmSymbols::java_lang_IllegalAccessError(),
622 "%s",
623 ss.as_string()
624 );
625 return;
626 }
627 }
628
629 Method* LinkResolver::resolve_method_statically(Bytecodes::Code code,
630 const constantPoolHandle& pool, int index, TRAPS) {
631 // This method is used only
632 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
633 // and
634 // (2) in Bytecode_invoke::static_target
635 // It appears to fail when applied to an invokeinterface call site.
636 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
637 // resolve klass
638 if (code == Bytecodes::_invokedynamic) {
639 Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
640 Symbol* method_name = vmSymbols::invoke_name();
641 Symbol* method_signature = pool->signature_ref_at(index);
642 Klass* current_klass = pool->pool_holder();
643 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
644 return resolve_method(link_info, code, THREAD);
645 }
646
647 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
648 Klass* resolved_klass = link_info.resolved_klass();
649
650 if (pool->has_preresolution()
651 || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
652 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
653 Method* result = ConstantPool::method_at_if_loaded(pool, index);
654 if (result != NULL) {
655 return result;
656 }
657 }
658
659 if (code == Bytecodes::_invokeinterface) {
660 return resolve_interface_method(link_info, code, THREAD);
661 } else if (code == Bytecodes::_invokevirtual) {
662 return resolve_method(link_info, code, THREAD);
663 } else if (!resolved_klass->is_interface()) {
664 return resolve_method(link_info, code, THREAD);
665 } else {
666 return resolve_interface_method(link_info, code, THREAD);
667 }
668 }
669
670 // Check and print a loader constraint violation message for method or interface method
671 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
672 const methodHandle& resolved_method,
673 const char* method_type, TRAPS) {
674 Handle current_loader(THREAD, link_info.current_klass()->class_loader());
675 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
676
677 ResourceMark rm(THREAD);
678 Symbol* failed_type_symbol =
679 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
680 resolved_loader, true, CHECK);
681 if (failed_type_symbol != NULL) {
682 Klass* current_class = link_info.current_klass();
683 ClassLoaderData* current_loader_data = current_class->class_loader_data();
684 assert(current_loader_data != NULL, "current class has no class loader data");
685 Klass* resolved_method_class = resolved_method->method_holder();
686 ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
687 assert(target_loader_data != NULL, "resolved method's class has no class loader data");
688
689 stringStream ss;
690 ss.print("loader constraint violation: when resolving %s '", method_type);
691 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
692 ss.print("' the class loader %s of the current class, %s,"
693 " and the class loader %s for the method's defining class, %s, have"
694 " different Class objects for the type %s used in the signature (%s; %s)",
695 current_loader_data->loader_name_and_id(),
696 current_class->name()->as_C_string(),
697 target_loader_data->loader_name_and_id(),
698 resolved_method_class->name()->as_C_string(),
699 failed_type_symbol->as_C_string(),
700 current_class->class_in_module_of_loader(false, true),
701 resolved_method_class->class_in_module_of_loader(false, true));
702 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
703 }
704 }
705
706 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
707 Klass* current_klass,
708 Klass* sel_klass, TRAPS) {
709 Handle ref_loader(THREAD, current_klass->class_loader());
710 Handle sel_loader(THREAD, sel_klass->class_loader());
711
712 ResourceMark rm(THREAD); // needed for check_signature_loaders
713 Symbol* failed_type_symbol =
714 SystemDictionary::check_signature_loaders(sig,
715 ref_loader, sel_loader,
716 false,
717 CHECK);
718 if (failed_type_symbol != NULL) {
719 stringStream ss;
720 const char* failed_type_name = failed_type_symbol->as_klass_external_name();
721
722 ss.print("loader constraint violation: when resolving field \"%s\" of type %s, "
723 "the class loader %s of the current class, %s, "
724 "and the class loader %s for the field's defining %s, %s, "
725 "have different Class objects for type %s (%s; %s)",
726 field->as_C_string(),
727 failed_type_name,
728 current_klass->class_loader_data()->loader_name_and_id(),
729 current_klass->external_name(),
730 sel_klass->class_loader_data()->loader_name_and_id(),
731 sel_klass->external_kind(),
732 sel_klass->external_name(),
733 failed_type_name,
734 current_klass->class_in_module_of_loader(false, true),
735 sel_klass->class_in_module_of_loader(false, true));
736 THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
737 }
738 }
739
740 Method* LinkResolver::resolve_method(const LinkInfo& link_info,
741 Bytecodes::Code code, TRAPS) {
742
743 Handle nested_exception;
744 Klass* resolved_klass = link_info.resolved_klass();
745
746 // 1. For invokevirtual, cannot call an interface method
747 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
748 ResourceMark rm(THREAD);
749 char buf[200];
750 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
751 resolved_klass->external_name());
752 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
753 }
754
755 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
756 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
757 ResourceMark rm(THREAD);
758 stringStream ss;
759 ss.print("Method '");
760 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
761 ss.print("' must be Methodref constant");
762 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
763 }
764
765 // 3. lookup method in resolved klass and its super klasses
766 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));
767
768 // 4. lookup method in all the interfaces implemented by the resolved klass
769 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
770 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
771
772 if (resolved_method.is_null()) {
773 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
774 Method* method = lookup_polymorphic_method(link_info, (Handle*)NULL, THREAD);
775 resolved_method = methodHandle(THREAD, method);
776 if (HAS_PENDING_EXCEPTION) {
777 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
778 CLEAR_PENDING_EXCEPTION;
779 }
780 }
781 }
782
783 // 5. method lookup failed
784 if (resolved_method.is_null()) {
785 ResourceMark rm(THREAD);
786 stringStream ss;
787 ss.print("'");
788 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
789 ss.print("'");
790 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
791 ss.as_string(), nested_exception, NULL);
792 }
793
794 // 6. access checks, access checking may be turned off when calling from within the VM.
795 Klass* current_klass = link_info.current_klass();
796 if (link_info.check_access()) {
797 assert(current_klass != NULL , "current_klass should not be null");
798
799 // check if method can be accessed by the referring class
800 check_method_accessability(current_klass,
801 resolved_klass,
802 resolved_method->method_holder(),
803 resolved_method,
804 CHECK_NULL);
805
806 // check loader constraints
807 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
808 }
809
810 return resolved_method();
811 }
812
813 static void trace_method_resolution(const char* prefix,
814 Klass* klass,
815 Klass* resolved_klass,
816 Method* method,
817 bool logitables,
818 int index = -1) {
819 #ifndef PRODUCT
820 ResourceMark rm;
821 Log(itables) logi;
822 LogStream lsi(logi.trace());
823 Log(vtables) logv;
824 LogStream lsv(logv.trace());
825 outputStream* st;
826 if (logitables) {
827 st = &lsi;
828 } else {
829 st = &lsv;
830 }
831 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
832 prefix,
833 (klass == NULL ? "<NULL>" : klass->internal_name()),
834 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
835 Method::name_and_sig_as_C_string(resolved_klass,
836 method->name(),
837 method->signature()),
838 method->method_holder()->internal_name());
839 method->print_linkage_flags(st);
840 if (index != -1) {
841 st->print("vtable_index:%d", index);
842 }
843 st->cr();
844 #endif // PRODUCT
845 }
846
847 // Do linktime resolution of a method in the interface within the context of the specied bytecode.
848 Method* LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {
849
850 Klass* resolved_klass = link_info.resolved_klass();
851
852 // check if klass is interface
853 if (!resolved_klass->is_interface()) {
854 ResourceMark rm(THREAD);
855 char buf[200];
856 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
857 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
858 }
859
860 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
861 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
862 ResourceMark rm(THREAD);
863 stringStream ss;
864 ss.print("Method '");
865 Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
866 ss.print("' must be InterfaceMethodref constant");
867 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
868 }
869
870 // lookup method in this interface or its super, java.lang.Object
871 // JDK8: also look for static methods
872 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));
873
874 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
875 // lookup method in all the super-interfaces
876 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
877 }
878
879 if (resolved_method.is_null()) {
880 // no method found
881 ResourceMark rm(THREAD);
882 stringStream ss;
883 ss.print("'");
884 Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
885 ss.print("'");
886 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
887 }
888
889 if (link_info.check_access()) {
890 // JDK8 adds non-public interface methods, and accessability check requirement
891 Klass* current_klass = link_info.current_klass();
892
893 assert(current_klass != NULL , "current_klass should not be null");
894
895 // check if method can be accessed by the referring class
896 check_method_accessability(current_klass,
897 resolved_klass,
898 resolved_method->method_holder(),
899 resolved_method,
900 CHECK_NULL);
901
902 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
903 }
904
905 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
906 ResourceMark rm(THREAD);
907 stringStream ss;
908 ss.print("Expected instance not static method '");
909 Method::print_external_name(&ss, resolved_klass,
910 resolved_method->name(), resolved_method->signature());
911 ss.print("'");
912 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
913 }
914
915 if (log_develop_is_enabled(Trace, itables)) {
916 char buf[200];
917 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
918 Bytecodes::name(code));
919 trace_method_resolution(buf, link_info.current_klass(), resolved_klass, resolved_method(), true);
920 }
921
922 return resolved_method();
923 }
924
925 //------------------------------------------------------------------------------------------------------------------------
926 // Field resolution
927
928 void LinkResolver::check_field_accessability(Klass* ref_klass,
929 Klass* resolved_klass,
930 Klass* sel_klass,
931 const fieldDescriptor& fd,
932 TRAPS) {
933 bool can_access = Reflection::verify_member_access(ref_klass,
934 resolved_klass,
935 sel_klass,
936 fd.access_flags(),
937 true, false, CHECK);
938 // Any existing exceptions that may have been thrown, for example LinkageErrors
939 // from nest-host resolution, have been allowed to propagate.
940 if (!can_access) {
941 bool same_module = (sel_klass->module() == ref_klass->module());
942 ResourceMark rm(THREAD);
943 stringStream ss;
944 ss.print("class %s tried to access %s%sfield %s.%s (%s%s%s)",
945 ref_klass->external_name(),
946 fd.is_protected() ? "protected " : "",
947 fd.is_private() ? "private " : "",
948 sel_klass->external_name(),
949 fd.name()->as_C_string(),
950 (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
951 (same_module) ? "" : "; ",
952 (same_module) ? "" : sel_klass->class_in_module_of_loader()
953 );
954 // For private access see if there was a problem with nest host
955 // resolution, and if so report that as part of the message.
956 if (fd.is_private()) {
957 print_nest_host_error_on(&ss, ref_klass, sel_klass, THREAD);
958 }
959 Exceptions::fthrow(THREAD_AND_LOCATION,
960 vmSymbols::java_lang_IllegalAccessError(),
961 "%s",
962 ss.as_string()
963 );
964 return;
965 }
966 }
967
968 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
969 LinkInfo link_info(pool, index, method, CHECK);
970 resolve_field(fd, link_info, byte, true, CHECK);
971 }
972
973 void LinkResolver::resolve_field(fieldDescriptor& fd,
974 const LinkInfo& link_info,
975 Bytecodes::Code byte, bool initialize_class,
976 TRAPS) {
977 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
978 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
979 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
980 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
981
982 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
983 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
984 // Check if there's a resolved klass containing the field
985 Klass* resolved_klass = link_info.resolved_klass();
986 Symbol* field = link_info.name();
987 Symbol* sig = link_info.signature();
988
989 if (resolved_klass == NULL) {
990 ResourceMark rm(THREAD);
991 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
992 }
993
994 // Resolve instance field
995 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
996 // check if field exists; i.e., if a klass containing the field def has been selected
997 if (sel_klass == NULL) {
998 ResourceMark rm(THREAD);
999 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
1000 }
1001
1002 // Access checking may be turned off when calling from within the VM.
1003 Klass* current_klass = link_info.current_klass();
1004 if (link_info.check_access()) {
1005
1006 // check access
1007 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
1008
1009 // check for errors
1010 if (is_static != fd.is_static()) {
1011 ResourceMark rm(THREAD);
1012 char msg[200];
1013 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
1014 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
1015 }
1016
1017 // A final field can be modified only
1018 // (1) by methods declared in the class declaring the field and
1019 // (2) by the <clinit> method (in case of a static field)
1020 // or by the <init> method (in case of an instance field).
1021 if (is_put && fd.access_flags().is_final()) {
1022 ResourceMark rm(THREAD);
1023 stringStream ss;
1024
1025 if (sel_klass != current_klass) {
1026 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1027 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1028 current_klass->external_name());
1029 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1030 }
1031
1032 if (fd.constants()->pool_holder()->major_version() >= 53) {
1033 Method* m = link_info.current_method();
1034 assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
1035 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1036 fd.is_static() &&
1037 !m->is_static_initializer());
1038 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1039 !fd.is_static() &&
1040 !m->is_object_initializer());
1041
1042 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1043 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1044 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1045 m->name()->as_C_string(),
1046 is_static ? "<clinit>" : "<init>");
1047 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1048 }
1049 }
1050 }
1051
1052 // initialize resolved_klass if necessary
1053 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1054 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1055 //
1056 // note 2: we don't want to force initialization if we are just checking
1057 // if the field access is legal; e.g., during compilation
1058 if (is_static && initialize_class) {
1059 sel_klass->initialize(CHECK);
1060 }
1061 }
1062
1063 if ((sel_klass != current_klass) && (current_klass != NULL)) {
1064 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
1065 }
1066
1067 // return information. note that the klass is set to the actual klass containing the
1068 // field, otherwise access of static fields in superclasses will not work.
1069 }
1070
1071
1072 //------------------------------------------------------------------------------------------------------------------------
1073 // Invoke resolution
1074 //
1075 // Naming conventions:
1076 //
1077 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
1078 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
1079 // resolved_klass the specified klass (i.e., specified via constant pool index)
1080 // recv_klass the receiver klass
1081
1082
1083 void LinkResolver::resolve_static_call(CallInfo& result,
1084 const LinkInfo& link_info,
1085 bool initialize_class, TRAPS) {
1086 Method* resolved_method = linktime_resolve_static_method(link_info, CHECK);
1087
1088 // The resolved class can change as a result of this resolution.
1089 Klass* resolved_klass = resolved_method->method_holder();
1090
1091 // Initialize klass (this should only happen if everything is ok)
1092 if (initialize_class && resolved_klass->should_be_initialized()) {
1093 resolved_klass->initialize(CHECK);
1094 // Use updated LinkInfo to reresolve with resolved method holder
1095 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
1096 link_info.current_klass(),
1097 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
1098 resolved_method = linktime_resolve_static_method(new_info, CHECK);
1099 }
1100
1101 // setup result
1102 result.set_static(resolved_klass, methodHandle(THREAD, resolved_method), CHECK);
1103 }
1104
1105 // throws linktime exceptions
1106 Method* LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
1107
1108 Klass* resolved_klass = link_info.resolved_klass();
1109 Method* resolved_method;
1110 if (!resolved_klass->is_interface()) {
1111 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1112 } else {
1113 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
1114 }
1115 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
1116
1117 // check if static
1118 if (!resolved_method->is_static()) {
1119 ResourceMark rm(THREAD);
1120 stringStream ss;
1121 ss.print("Expected static method '");
1122 resolved_method->print_external_name(&ss);
1123 ss.print("'");
1124 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1125 }
1126 return resolved_method;
1127 }
1128
1129
1130 void LinkResolver::resolve_special_call(CallInfo& result,
1131 Handle recv,
1132 const LinkInfo& link_info,
1133 TRAPS) {
1134 Method* resolved_method = linktime_resolve_special_method(link_info, CHECK);
1135 runtime_resolve_special_method(result, link_info, methodHandle(THREAD, resolved_method), recv, CHECK);
1136 }
1137
1138 // throws linktime exceptions
1139 Method* LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, TRAPS) {
1140
1141 // Invokespecial is called for multiple special reasons:
1142 // <init>
1143 // local private method invocation, for classes and interfaces
1144 // superclass.method, which can also resolve to a default method
1145 // and the selected method is recalculated relative to the direct superclass
1146 // superinterface.method, which explicitly does not check shadowing
1147 Klass* resolved_klass = link_info.resolved_klass();
1148 Method* resolved_method;
1149
1150 if (!resolved_klass->is_interface()) {
1151 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1152 } else {
1153 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1154 }
1155
1156 // check if method name is <init>, that it is found in same klass as static type
1157 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1158 resolved_method->method_holder() != resolved_klass) {
1159 ResourceMark rm(THREAD);
1160 stringStream ss;
1161 ss.print("%s: method '", resolved_klass->external_name());
1162 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1163 ss.print(" %s(", resolved_method->name()->as_C_string());
1164 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1165 ss.print(")' not found");
1166 Exceptions::fthrow(
1167 THREAD_AND_LOCATION,
1168 vmSymbols::java_lang_NoSuchMethodError(),
1169 "%s", ss.as_string());
1170 return NULL;
1171 }
1172
1173 // ensure that invokespecial's interface method reference is in
1174 // a direct superinterface, not an indirect superinterface
1175 Klass* current_klass = link_info.current_klass();
1176 if (current_klass != NULL && resolved_klass->is_interface()) {
1177 InstanceKlass* ck = InstanceKlass::cast(current_klass);
1178 InstanceKlass *klass_to_check = !ck->is_unsafe_anonymous() ?
1179 ck :
1180 ck->unsafe_anonymous_host();
1181 // Disable verification for the dynamically-generated reflection bytecodes.
1182 bool is_reflect = klass_to_check->is_subclass_of(
1183 SystemDictionary::reflect_MagicAccessorImpl_klass());
1184
1185 if (!is_reflect &&
1186 !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
1187 ResourceMark rm(THREAD);
1188 stringStream ss;
1189 ss.print("Interface method reference: '");
1190 resolved_method->print_external_name(&ss);
1191 ss.print("', is in an indirect superinterface of %s",
1192 current_klass->external_name());
1193 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1194 }
1195 }
1196
1197 // check if not static
1198 if (resolved_method->is_static()) {
1199 ResourceMark rm(THREAD);
1200 stringStream ss;
1201 ss.print("Expecting non-static method '");
1202 resolved_method->print_external_name(&ss);
1203 ss.print("'");
1204 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1205 }
1206
1207 if (log_develop_is_enabled(Trace, itables)) {
1208 trace_method_resolution("invokespecial resolved method: caller-class:",
1209 current_klass, resolved_klass, resolved_method, true);
1210 }
1211
1212 return resolved_method;
1213 }
1214
1215 // throws runtime exceptions
1216 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1217 const LinkInfo& link_info,
1218 const methodHandle& resolved_method,
1219 Handle recv, TRAPS) {
1220
1221 Klass* resolved_klass = link_info.resolved_klass();
1222
1223 // resolved method is selected method unless we have an old-style lookup
1224 // for a superclass method
1225 // Invokespecial for a superinterface, resolved method is selected method,
1226 // no checks for shadowing
1227 methodHandle sel_method(THREAD, resolved_method());
1228
1229 if (link_info.check_access() &&
1230 // check if the method is not <init>
1231 resolved_method->name() != vmSymbols::object_initializer_name()) {
1232
1233 Klass* current_klass = link_info.current_klass();
1234
1235 // Check if the class of the resolved_klass is a superclass
1236 // (not supertype in order to exclude interface classes) of the current class.
1237 // This check is not performed for super.invoke for interface methods
1238 // in super interfaces.
1239 if (current_klass->is_subclass_of(resolved_klass) &&
1240 current_klass != resolved_klass) {
1241 // Lookup super method
1242 Klass* super_klass = current_klass->super();
1243 Method* instance_method = lookup_instance_method_in_klasses(super_klass,
1244 resolved_method->name(),
1245 resolved_method->signature(),
1246 Klass::find_private, CHECK);
1247 sel_method = methodHandle(THREAD, instance_method);
1248
1249 // check if found
1250 if (sel_method.is_null()) {
1251 ResourceMark rm(THREAD);
1252 stringStream ss;
1253 ss.print("'");
1254 resolved_method->print_external_name(&ss);
1255 ss.print("'");
1256 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1257 // check loader constraints if found a different method
1258 } else if (sel_method() != resolved_method()) {
1259 check_method_loader_constraints(link_info, sel_method, "method", CHECK);
1260 }
1261 }
1262
1263 // Check that the class of objectref (the receiver) is the current class or interface,
1264 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1265 // throws IllegalAccessError.
1266 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1267 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1268 // a class. If the sender is an interface, the check has to be performed at runtime.
1269 InstanceKlass* sender = InstanceKlass::cast(current_klass);
1270 sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
1271 if (sender->is_interface() && recv.not_null()) {
1272 Klass* receiver_klass = recv->klass();
1273 if (!receiver_klass->is_subtype_of(sender)) {
1274 ResourceMark rm(THREAD);
1275 char buf[500];
1276 jio_snprintf(buf, sizeof(buf),
1277 "Receiver class %s must be the current class or a subtype of interface %s",
1278 receiver_klass->external_name(),
1279 sender->external_name());
1280 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1281 }
1282 }
1283 }
1284
1285 // check if not static
1286 if (sel_method->is_static()) {
1287 ResourceMark rm(THREAD);
1288 stringStream ss;
1289 ss.print("Expecting non-static method '");
1290 resolved_method->print_external_name(&ss);
1291 ss.print("'");
1292 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1293 }
1294
1295 // check if abstract
1296 if (sel_method->is_abstract()) {
1297 ResourceMark rm(THREAD);
1298 stringStream ss;
1299 ss.print("'");
1300 Method::print_external_name(&ss, resolved_klass, sel_method->name(), sel_method->signature());
1301 ss.print("'");
1302 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1303 }
1304
1305 if (log_develop_is_enabled(Trace, itables)) {
1306 trace_method_resolution("invokespecial selected method: resolved-class:",
1307 resolved_klass, resolved_klass, sel_method(), true);
1308 }
1309
1310 // setup result
1311 result.set_static(resolved_klass, sel_method, CHECK);
1312 }
1313
1314 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
1315 const LinkInfo& link_info,
1316 bool check_null_and_abstract, TRAPS) {
1317 Method* resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1318 runtime_resolve_virtual_method(result, methodHandle(THREAD, resolved_method),
1319 link_info.resolved_klass(),
1320 recv, receiver_klass,
1321 check_null_and_abstract, CHECK);
1322 }
1323
1324 // throws linktime exceptions
1325 Method* LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1326 TRAPS) {
1327 // normal method resolution
1328 Method* resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);
1329
1330 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1331 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1332
1333 // check if private interface method
1334 Klass* resolved_klass = link_info.resolved_klass();
1335 Klass* current_klass = link_info.current_klass();
1336
1337 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
1338 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1339 ResourceMark rm(THREAD);
1340 stringStream ss;
1341 ss.print("private interface method requires invokespecial, not invokevirtual: method '");
1342 resolved_method->print_external_name(&ss);
1343 ss.print("', caller-class: %s",
1344 (current_klass == NULL ? "<null>" : current_klass->internal_name()));
1345 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1346 }
1347
1348 // check if not static
1349 if (resolved_method->is_static()) {
1350 ResourceMark rm(THREAD);
1351 stringStream ss;
1352 ss.print("Expecting non-static method '");
1353 resolved_method->print_external_name(&ss);
1354 ss.print("'");
1355 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
1356 }
1357
1358 if (log_develop_is_enabled(Trace, vtables)) {
1359 trace_method_resolution("invokevirtual resolved method: caller-class:",
1360 current_klass, resolved_klass, resolved_method, false);
1361 }
1362
1363 return resolved_method;
1364 }
1365
1366 // throws runtime exceptions
1367 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1368 const methodHandle& resolved_method,
1369 Klass* resolved_klass,
1370 Handle recv,
1371 Klass* recv_klass,
1372 bool check_null_and_abstract,
1373 TRAPS) {
1374
1375 // setup default return values
1376 int vtable_index = Method::invalid_vtable_index;
1377 methodHandle selected_method;
1378
1379 // runtime method resolution
1380 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1381 THROW(vmSymbols::java_lang_NullPointerException());
1382 }
1383
1384 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1385 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1386 // a missing receiver might result in a bogus lookup.
1387 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1388
1389 // do lookup based on receiver klass using the vtable index
1390 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1391 vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
1392 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1393
1394 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1395 } else {
1396 // at this point we are sure that resolved_method is virtual and not
1397 // a default or miranda method; therefore, it must have a valid vtable index.
1398 assert(!resolved_method->has_itable_index(), "");
1399 vtable_index = resolved_method->vtable_index();
1400 // We could get a negative vtable_index of nonvirtual_vtable_index for private
1401 // methods, or for final methods. Private methods never appear in the vtable
1402 // and never override other methods. As an optimization, final methods are
1403 // never put in the vtable, unless they override an existing method.
1404 // So if we do get nonvirtual_vtable_index, it means the selected method is the
1405 // resolved method, and it can never be changed by an override.
1406 if (vtable_index == Method::nonvirtual_vtable_index) {
1407 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1408 selected_method = resolved_method;
1409 } else {
1410 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
1411 }
1412 }
1413
1414 // check if method exists
1415 if (selected_method.is_null()) {
1416 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1417 }
1418
1419 // check if abstract
1420 if (check_null_and_abstract && selected_method->is_abstract()) {
1421 // Pass arguments for generating a verbose error message.
1422 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1423 }
1424
1425 if (log_develop_is_enabled(Trace, vtables)) {
1426 trace_method_resolution("invokevirtual selected method: receiver-class:",
1427 recv_klass, resolved_klass, selected_method(),
1428 false, vtable_index);
1429 }
1430 // setup result
1431 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1432 }
1433
1434 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
1435 const LinkInfo& link_info,
1436 bool check_null_and_abstract, TRAPS) {
1437 // throws linktime exceptions
1438 Method* resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1439 methodHandle mh(THREAD, resolved_method);
1440 runtime_resolve_interface_method(result, mh, link_info.resolved_klass(),
1441 recv, recv_klass, check_null_and_abstract, CHECK);
1442 }
1443
1444 Method* LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1445 TRAPS) {
1446 // normal interface method resolution
1447 Method* resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
1448 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1449 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1450
1451 return resolved_method;
1452 }
1453
1454 // throws runtime exceptions
1455 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1456 const methodHandle& resolved_method,
1457 Klass* resolved_klass,
1458 Handle recv,
1459 Klass* recv_klass,
1460 bool check_null_and_abstract, TRAPS) {
1461
1462 // check if receiver exists
1463 if (check_null_and_abstract && recv.is_null()) {
1464 THROW(vmSymbols::java_lang_NullPointerException());
1465 }
1466
1467 // check if receiver klass implements the resolved interface
1468 if (!recv_klass->is_subtype_of(resolved_klass)) {
1469 ResourceMark rm(THREAD);
1470 char buf[200];
1471 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1472 recv_klass->external_name(),
1473 resolved_klass->external_name());
1474 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1475 }
1476
1477 methodHandle selected_method = resolved_method;
1478
1479 // resolve the method in the receiver class, unless it is private
1480 if (!resolved_method()->is_private()) {
1481 // do lookup based on receiver klass
1482 // This search must match the linktime preparation search for itable initialization
1483 // to correctly enforce loader constraints for interface method inheritance.
1484 // Private methods are skipped as the resolved method was not private.
1485 Method* method = lookup_instance_method_in_klasses(recv_klass,
1486 resolved_method->name(),
1487 resolved_method->signature(),
1488 Klass::skip_private, CHECK);
1489 selected_method = methodHandle(THREAD, method);
1490
1491 if (selected_method.is_null() && !check_null_and_abstract) {
1492 // In theory this is a harmless placeholder value, but
1493 // in practice leaving in null affects the nsk default method tests.
1494 // This needs further study.
1495 selected_method = resolved_method;
1496 }
1497 // check if method exists
1498 if (selected_method.is_null()) {
1499 // Pass arguments for generating a verbose error message.
1500 throw_abstract_method_error(resolved_method, recv_klass, CHECK);
1501 }
1502 // check access
1503 // Throw Illegal Access Error if selected_method is not public.
1504 if (!selected_method->is_public()) {
1505 ResourceMark rm(THREAD);
1506 stringStream ss;
1507 ss.print("'");
1508 Method::print_external_name(&ss, recv_klass, selected_method->name(), selected_method->signature());
1509 ss.print("'");
1510 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1511 }
1512 // check if abstract
1513 if (check_null_and_abstract && selected_method->is_abstract()) {
1514 throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
1515 }
1516 }
1517
1518 if (log_develop_is_enabled(Trace, itables)) {
1519 trace_method_resolution("invokeinterface selected method: receiver-class:",
1520 recv_klass, resolved_klass, selected_method(), true);
1521 }
1522 // setup result
1523 if (resolved_method->has_vtable_index()) {
1524 int vtable_index = resolved_method->vtable_index();
1525 log_develop_trace(itables)(" -- vtable index: %d", vtable_index);
1526 assert(vtable_index == selected_method->vtable_index(), "sanity check");
1527 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1528 } else if (resolved_method->has_itable_index()) {
1529 int itable_index = resolved_method()->itable_index();
1530 log_develop_trace(itables)(" -- itable index: %d", itable_index);
1531 result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
1532 } else {
1533 int index = resolved_method->vtable_index();
1534 log_develop_trace(itables)(" -- non itable/vtable index: %d", index);
1535 assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
1536 assert(resolved_method()->is_private() ||
1537 (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
1538 "Should only have non-virtual invokeinterface for private or final-Object methods!");
1539 assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
1540 // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
1541 result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, index, CHECK);
1542 }
1543 }
1544
1545
1546 Method* LinkResolver::linktime_resolve_interface_method_or_null(
1547 const LinkInfo& link_info) {
1548 EXCEPTION_MARK;
1549 Method* method_result = linktime_resolve_interface_method(link_info, THREAD);
1550 if (HAS_PENDING_EXCEPTION) {
1551 CLEAR_PENDING_EXCEPTION;
1552 return NULL;
1553 } else {
1554 return method_result;
1555 }
1556 }
1557
1558 Method* LinkResolver::linktime_resolve_virtual_method_or_null(
1559 const LinkInfo& link_info) {
1560 EXCEPTION_MARK;
1561 Method* method_result = linktime_resolve_virtual_method(link_info, THREAD);
1562 if (HAS_PENDING_EXCEPTION) {
1563 CLEAR_PENDING_EXCEPTION;
1564 return NULL;
1565 } else {
1566 return method_result;
1567 }
1568 }
1569
1570 Method* LinkResolver::resolve_virtual_call_or_null(
1571 Klass* receiver_klass,
1572 const LinkInfo& link_info) {
1573 EXCEPTION_MARK;
1574 CallInfo info;
1575 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1576 if (HAS_PENDING_EXCEPTION) {
1577 CLEAR_PENDING_EXCEPTION;
1578 return NULL;
1579 }
1580 return info.selected_method();
1581 }
1582
1583 Method* LinkResolver::resolve_interface_call_or_null(
1584 Klass* receiver_klass,
1585 const LinkInfo& link_info) {
1586 EXCEPTION_MARK;
1587 CallInfo info;
1588 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1589 if (HAS_PENDING_EXCEPTION) {
1590 CLEAR_PENDING_EXCEPTION;
1591 return NULL;
1592 }
1593 return info.selected_method();
1594 }
1595
1596 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
1597 const LinkInfo& link_info) {
1598 EXCEPTION_MARK;
1599 CallInfo info;
1600 resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1601 /*check_null_or_abstract*/false, THREAD);
1602 if (HAS_PENDING_EXCEPTION) {
1603 CLEAR_PENDING_EXCEPTION;
1604 return Method::invalid_vtable_index;
1605 }
1606 return info.vtable_index();
1607 }
1608
1609 Method* LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1610 EXCEPTION_MARK;
1611 CallInfo info;
1612 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1613 if (HAS_PENDING_EXCEPTION) {
1614 CLEAR_PENDING_EXCEPTION;
1615 return NULL;
1616 }
1617 return info.selected_method();
1618 }
1619
1620 Method* LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1621 EXCEPTION_MARK;
1622 CallInfo info;
1623 resolve_special_call(info, Handle(), link_info, THREAD);
1624 if (HAS_PENDING_EXCEPTION) {
1625 CLEAR_PENDING_EXCEPTION;
1626 return NULL;
1627 }
1628 return info.selected_method();
1629 }
1630
1631
1632
1633 //------------------------------------------------------------------------------------------------------------------------
1634 // ConstantPool entries
1635
1636 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1637 switch (byte) {
1638 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1639 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1640 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1641 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1642 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1643 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1644 default : break;
1645 }
1646 return;
1647 }
1648
1649 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1650 const methodHandle& attached_method,
1651 Bytecodes::Code byte, TRAPS) {
1652 Klass* defc = attached_method->method_holder();
1653 Symbol* name = attached_method->name();
1654 Symbol* type = attached_method->signature();
1655 LinkInfo link_info(defc, name, type);
1656 switch(byte) {
1657 case Bytecodes::_invokevirtual:
1658 resolve_virtual_call(result, recv, recv->klass(), link_info,
1659 /*check_null_and_abstract=*/true, CHECK);
1660 break;
1661 case Bytecodes::_invokeinterface:
1662 resolve_interface_call(result, recv, recv->klass(), link_info,
1663 /*check_null_and_abstract=*/true, CHECK);
1664 break;
1665 case Bytecodes::_invokestatic:
1666 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1667 break;
1668 case Bytecodes::_invokespecial:
1669 resolve_special_call(result, recv, link_info, CHECK);
1670 break;
1671 default:
1672 fatal("bad call: %s", Bytecodes::name(byte));
1673 break;
1674 }
1675 }
1676
1677 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1678 LinkInfo link_info(pool, index, CHECK);
1679 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1680 }
1681
1682
1683 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
1684 const constantPoolHandle& pool, int index, TRAPS) {
1685 LinkInfo link_info(pool, index, CHECK);
1686 resolve_special_call(result, recv, link_info, CHECK);
1687 }
1688
1689
1690 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1691 const constantPoolHandle& pool, int index,
1692 TRAPS) {
1693
1694 LinkInfo link_info(pool, index, CHECK);
1695 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1696 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1697 }
1698
1699
1700 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1701 LinkInfo link_info(pool, index, CHECK);
1702 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
1703 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1704 }
1705
1706
1707 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1708 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1709 LinkInfo link_info(pool, index, CHECK);
1710 if (TraceMethodHandles) {
1711 ResourceMark rm(THREAD);
1712 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1713 link_info.signature()->as_C_string());
1714 }
1715 resolve_handle_call(result, link_info, CHECK);
1716 }
1717
1718 void LinkResolver::resolve_handle_call(CallInfo& result,
1719 const LinkInfo& link_info,
1720 TRAPS) {
1721 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1722 Klass* resolved_klass = link_info.resolved_klass();
1723 assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
1724 resolved_klass == SystemDictionary::VarHandle_klass(), "");
1725 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1726 Handle resolved_appendix;
1727 Method* resolved_method = lookup_polymorphic_method(link_info, &resolved_appendix, CHECK);
1728 result.set_handle(resolved_klass, methodHandle(THREAD, resolved_method), resolved_appendix, CHECK);
1729 }
1730
1731 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int indy_index, TRAPS) {
1732 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(indy_index);
1733 int pool_index = cpce->constant_pool_index();
1734
1735 // Resolve the bootstrap specifier (BSM + optional arguments).
1736 BootstrapInfo bootstrap_specifier(pool, pool_index, indy_index);
1737
1738 // Check if CallSite has been bound already or failed already, and short circuit:
1739 {
1740 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1741 if (is_done) return;
1742 }
1743
1744 // The initial step in Call Site Specifier Resolution is to resolve the symbolic
1745 // reference to a method handle which will be the bootstrap method for a dynamic
1746 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap
1747 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
1748 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to
1749 // set the indy_rf flag since any subsequent invokedynamic instruction which shares
1750 // this bootstrap method will encounter the resolution of MethodHandleInError.
1751
1752 resolve_dynamic_call(result, bootstrap_specifier, CHECK);
1753
1754 if (TraceMethodHandles) {
1755 bootstrap_specifier.print_msg_on(tty, "resolve_invokedynamic");
1756 }
1757
1758 // The returned linkage result is provisional up to the moment
1759 // the interpreter or runtime performs a serialized check of
1760 // the relevant CPCE::f1 field. This is done by the caller
1761 // of this method, via CPCE::set_dynamic_call, which uses
1762 // an ObjectLocker to do the final serialization of updates
1763 // to CPCE state, including f1.
1764 }
1765
1766 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1767 BootstrapInfo& bootstrap_specifier,
1768 TRAPS) {
1769 // JSR 292: this must resolve to an implicitly generated method
1770 // such as MH.linkToCallSite(*...) or some other call-site shape.
1771 // The appendix argument is likely to be a freshly-created CallSite.
1772 // It may also be a MethodHandle from an unwrapped ConstantCallSite,
1773 // or any other reference. The resolved_method as well as the appendix
1774 // are both recorded together via CallInfo::set_handle.
1775 SystemDictionary::invoke_bootstrap_method(bootstrap_specifier, THREAD);
1776 Exceptions::wrap_dynamic_exception(THREAD);
1777
1778 if (HAS_PENDING_EXCEPTION) {
1779 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1780 // Let any random low-level IE or SOE or OOME just bleed through.
1781 // Basically we pretend that the bootstrap method was never called,
1782 // if it fails this way: We neither record a successful linkage,
1783 // nor do we memorize a LE for posterity.
1784 return;
1785 }
1786 // JVMS 5.4.3 says: If an attempt by the Java Virtual Machine to resolve
1787 // a symbolic reference fails because an error is thrown that is an
1788 // instance of LinkageError (or a subclass), then subsequent attempts to
1789 // resolve the reference always fail with the same error that was thrown
1790 // as a result of the initial resolution attempt.
1791 bool recorded_res_status = bootstrap_specifier.save_and_throw_indy_exc(CHECK);
1792 if (!recorded_res_status) {
1793 // Another thread got here just before we did. So, either use the method
1794 // that it resolved or throw the LinkageError exception that it threw.
1795 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(result, CHECK);
1796 if (is_done) return;
1797 }
1798 assert(bootstrap_specifier.invokedynamic_cp_cache_entry()->indy_resolution_failed(),
1799 "Resolution failure flag wasn't set");
1800 }
1801
1802 bootstrap_specifier.resolve_newly_linked_invokedynamic(result, CHECK);
1803 // Exceptions::wrap_dynamic_exception not used because
1804 // set_handle doesn't throw linkage errors
1805 }
1806
1807 // Selected method is abstract.
1808 void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
1809 const methodHandle& selected_method,
1810 Klass *recv_klass, TRAPS) {
1811 Klass *resolved_klass = resolved_method->method_holder();
1812 ResourceMark rm(THREAD);
1813 stringStream ss;
1814
1815 if (recv_klass != NULL) {
1816 ss.print("Receiver class %s does not define or inherit an "
1817 "implementation of the",
1818 recv_klass->external_name());
1819 } else {
1820 ss.print("Missing implementation of");
1821 }
1822
1823 assert(resolved_method.not_null(), "Sanity");
1824 ss.print(" resolved method '%s%s",
1825 resolved_method->is_abstract() ? "abstract " : "",
1826 resolved_method->is_private() ? "private " : "");
1827 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1828 ss.print(" %s(", resolved_method->name()->as_C_string());
1829 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1830 ss.print(")' of %s %s.",
1831 resolved_klass->external_kind(),
1832 resolved_klass->external_name());
1833
1834 if (selected_method.not_null() && !(resolved_method == selected_method)) {
1835 ss.print(" Selected method is '%s%s",
1836 selected_method->is_abstract() ? "abstract " : "",
1837 selected_method->is_private() ? "private " : "");
1838 selected_method->print_external_name(&ss);
1839 ss.print("'.");
1840 }
1841
1842 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1843 }