1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/defaultMethods.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "gc_interface/collectedHeap.inline.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "prims/nativeLookup.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/fieldDescriptor.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/reflection.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/thread.inline.hpp"
47 #include "runtime/vmThread.hpp"
48
49
50 //------------------------------------------------------------------------------------------------------------------------
51 // Implementation of CallInfo
52
53
54 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
55 int vtable_index = Method::nonvirtual_vtable_index;
56 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
57 }
58
59
60 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index, TRAPS) {
61 // This is only called for interface methods. If the resolved_method
62 // comes from java/lang/Object, it can be the subject of a virtual call, so
63 // we should pick the vtable index from the resolved method.
64 // In that case, the caller must call set_virtual instead of set_interface.
65 assert(resolved_method->method_holder()->is_interface(), "");
66 assert(itable_index == resolved_method()->itable_index(), "");
67 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
68 }
69
70 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
71 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
72 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
73 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
74 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
75 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
76 }
77
78 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) {
79 if (resolved_method.is_null()) {
80 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
81 }
82 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
83 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
84 resolved_method->is_compiled_lambda_form(),
85 "linkMethod must return one of these");
86 int vtable_index = Method::nonvirtual_vtable_index;
87 assert(!resolved_method->has_vtable_index(), "");
88 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
89 _resolved_appendix = resolved_appendix;
90 _resolved_method_type = resolved_method_type;
91 }
92
93 void CallInfo::set_common(KlassHandle resolved_klass,
94 KlassHandle selected_klass,
95 methodHandle resolved_method,
96 methodHandle selected_method,
97 CallKind kind,
98 int index,
99 TRAPS) {
100 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
101 _resolved_klass = resolved_klass;
102 _selected_klass = selected_klass;
103 _resolved_method = resolved_method;
104 _selected_method = selected_method;
105 _call_kind = kind;
106 _call_index = index;
107 _resolved_appendix = Handle();
108 DEBUG_ONLY(verify()); // verify before making side effects
109
110 if (CompilationPolicy::must_be_compiled(selected_method)) {
111 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
112
113 // Note: with several active threads, the must_be_compiled may be true
114 // while can_be_compiled is false; remove assert
115 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
116 if (THREAD->is_Compiler_thread()) {
117 // don't force compilation, resolve was on behalf of compiler
118 return;
119 }
120 if (selected_method->method_holder()->is_not_initialized()) {
121 // 'is_not_initialized' means not only '!is_initialized', but also that
122 // initialization has not been started yet ('!being_initialized')
123 // Do not force compilation of methods in uninitialized classes.
124 // Note that doing this would throw an assert later,
125 // in CompileBroker::compile_method.
126 // We sometimes use the link resolver to do reflective lookups
127 // even before classes are initialized.
128 return;
129 }
130 CompileBroker::compile_method(selected_method, InvocationEntryBci,
131 CompilationPolicy::policy()->initial_compile_level(),
132 methodHandle(), 0, "must_be_compiled", CHECK);
133 }
134 }
135
136 // utility query for unreflecting a method
137 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
138 Klass* resolved_method_holder = resolved_method->method_holder();
139 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
140 resolved_klass = resolved_method_holder;
141 }
142 _resolved_klass = resolved_klass;
143 _selected_klass = resolved_klass;
144 _resolved_method = resolved_method;
145 _selected_method = resolved_method;
146 // classify:
147 CallKind kind = CallInfo::unknown_kind;
148 int index = resolved_method->vtable_index();
149 if (resolved_method->can_be_statically_bound()) {
150 kind = CallInfo::direct_call;
151 } else if (!resolved_method_holder->is_interface()) {
152 // Could be an Object method inherited into an interface, but still a vtable call.
153 kind = CallInfo::vtable_call;
154 } else if (!resolved_klass->is_interface()) {
155 // A default or miranda method. Compute the vtable index.
156 ResourceMark rm;
157 klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
158 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
159 resolved_method);
160 assert(index >= 0 , "we should have valid vtable index at this point");
161
162 kind = CallInfo::vtable_call;
163 } else if (resolved_method->has_vtable_index()) {
164 // Can occur if an interface redeclares a method of Object.
165
166 #ifdef ASSERT
167 // Ensure that this is really the case.
168 KlassHandle object_klass = SystemDictionary::Object_klass();
169 Method * object_resolved_method = object_klass()->vtable()->method_at(index);
170 assert(object_resolved_method->name() == resolved_method->name(),
171 err_msg("Object and interface method names should match at vtable index %d, %s != %s",
172 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string()));
173 assert(object_resolved_method->signature() == resolved_method->signature(),
174 err_msg("Object and interface method signatures should match at vtable index %d, %s != %s",
175 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string()));
176 #endif // ASSERT
177
178 kind = CallInfo::vtable_call;
179 } else {
180 // A regular interface call.
181 kind = CallInfo::itable_call;
182 index = resolved_method->itable_index();
183 }
184 assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index));
185 _call_kind = kind;
186 _call_index = index;
187 _resolved_appendix = Handle();
188 DEBUG_ONLY(verify());
189 }
190
191 #ifdef ASSERT
192 void CallInfo::verify() {
193 switch (call_kind()) { // the meaning and allowed value of index depends on kind
194 case CallInfo::direct_call:
195 if (_call_index == Method::nonvirtual_vtable_index) break;
196 // else fall through to check vtable index:
197 case CallInfo::vtable_call:
198 assert(resolved_klass()->verify_vtable_index(_call_index), "");
199 break;
200 case CallInfo::itable_call:
201 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
202 break;
203 case CallInfo::unknown_kind:
204 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
205 break;
206 default:
207 fatal(err_msg_res("Unexpected call kind %d", call_kind()));
208 }
209 }
210 #endif //ASSERT
211
212
213
214 //------------------------------------------------------------------------------------------------------------------------
215 // Klass resolution
216
217 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
218 if (!Reflection::verify_class_access(ref_klass(),
219 sel_klass(),
220 true)) {
221 ResourceMark rm(THREAD);
222 Exceptions::fthrow(
223 THREAD_AND_LOCATION,
224 vmSymbols::java_lang_IllegalAccessError(),
225 "tried to access class %s from class %s",
226 sel_klass->external_name(),
227 ref_klass->external_name()
228 );
229 return;
230 }
231 }
232
233 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
234 Klass* result_oop = pool->klass_ref_at(index, CHECK);
235 result = KlassHandle(THREAD, result_oop);
236 }
237
238 //------------------------------------------------------------------------------------------------------------------------
239 // Method resolution
240 //
241 // According to JVM spec. $5.4.3c & $5.4.3d
242
243 // Look up method in klasses, including static methods
244 // Then look up local default methods
245 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, bool checkpolymorphism, bool in_imethod_resolve, TRAPS) {
246 Method* result_oop = klass->uncached_lookup_method(name, signature);
247
248 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
249 // ignore static and non-public methods of java.lang.Object,
250 // like clone, finalize, registerNatives.
251 if (in_imethod_resolve &&
252 result_oop != NULL &&
253 klass->is_interface() &&
254 (result_oop->is_static() || !result_oop->is_public()) &&
255 result_oop->method_holder() == SystemDictionary::Object_klass()) {
256 result_oop = NULL;
257 }
258
259 if (result_oop == NULL) {
260 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
261 if (default_methods != NULL) {
262 result_oop = InstanceKlass::find_method(default_methods, name, signature);
263 }
264 }
265
266 if (checkpolymorphism && EnableInvokeDynamic && result_oop != NULL) {
267 vmIntrinsics::ID iid = result_oop->intrinsic_id();
268 if (MethodHandles::is_signature_polymorphic(iid)) {
269 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
270 return;
271 }
272 }
273 result = methodHandle(THREAD, result_oop);
274 }
275
276 // returns first instance method
277 // Looks up method in classes, then looks up local default methods
278 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
279 Method* result_oop = klass->uncached_lookup_method(name, signature);
280 result = methodHandle(THREAD, result_oop);
281 while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
282 KlassHandle super_klass = KlassHandle(THREAD, result->method_holder()->super());
283 result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature));
284 }
285
286 if (result.is_null()) {
287 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
288 if (default_methods != NULL) {
289 result = methodHandle(InstanceKlass::find_method(default_methods, name, signature));
290 assert(result.is_null() || !result->is_static(), "static defaults not allowed");
291 }
292 }
293 }
294
295 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
296 methodHandle resolved_method) {
297
298 int vtable_index = Method::invalid_vtable_index;
299 Symbol* name = resolved_method->name();
300 Symbol* signature = resolved_method->signature();
301
302 // First check in default method array
303 if (!resolved_method->is_abstract() &&
304 (InstanceKlass::cast(klass())->default_methods() != NULL)) {
305 int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature);
306 if (index >= 0 ) {
307 vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
308 }
309 }
310 if (vtable_index == Method::invalid_vtable_index) {
311 // get vtable_index for miranda methods
312 ResourceMark rm;
313 klassVtable *vt = InstanceKlass::cast(klass())->vtable();
314 vtable_index = vt->index_of_miranda(name, signature);
315 }
316 return vtable_index;
317 }
318
319 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
320 InstanceKlass *ik = InstanceKlass::cast(klass());
321 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));
322 }
323
324 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
325 KlassHandle klass, Symbol* name, Symbol* full_signature,
326 KlassHandle current_klass,
327 Handle *appendix_result_or_null,
328 Handle *method_type_result,
329 TRAPS) {
330 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
331 if (TraceMethodHandles) {
332 ResourceMark rm(THREAD);
333 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
334 vmIntrinsics::name_at(iid), klass->external_name(),
335 name->as_C_string(), full_signature->as_C_string());
336 }
337 if (EnableInvokeDynamic &&
338 klass() == SystemDictionary::MethodHandle_klass() &&
339 iid != vmIntrinsics::_none) {
340 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
341 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
342 // Do not erase last argument type (MemberName) if it is a static linkTo method.
343 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
344 TempNewSymbol basic_signature =
345 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
346 if (TraceMethodHandles) {
347 ResourceMark rm(THREAD);
348 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
349 name->as_C_string(),
350 full_signature->as_C_string(),
351 basic_signature->as_C_string());
352 }
353 result = SystemDictionary::find_method_handle_intrinsic(iid,
354 basic_signature,
355 CHECK);
356 if (result.not_null()) {
357 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
358 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
359 assert(basic_signature == result->signature(), "predict the result signature");
360 if (TraceMethodHandles) {
361 tty->print("lookup_polymorphic_method => intrinsic ");
362 result->print_on(tty);
363 }
364 return;
365 }
366 } else if (iid == vmIntrinsics::_invokeGeneric
367 && !THREAD->is_Compiler_thread()
368 && appendix_result_or_null != NULL) {
369 // This is a method with type-checking semantics.
370 // We will ask Java code to spin an adapter method for it.
371 if (!MethodHandles::enabled()) {
372 // Make sure the Java part of the runtime has been booted up.
373 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
374 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
375 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
376 Handle(),
377 Handle(),
378 true,
379 CHECK);
380 }
381 }
382
383 Handle appendix;
384 Handle method_type;
385 result = SystemDictionary::find_method_handle_invoker(name,
386 full_signature,
387 current_klass,
388 &appendix,
389 &method_type,
390 CHECK);
391 if (TraceMethodHandles) {
392 tty->print("lookup_polymorphic_method => (via Java) ");
393 result->print_on(tty);
394 tty->print(" lookup_polymorphic_method => appendix = ");
395 if (appendix.is_null()) tty->print_cr("(none)");
396 else appendix->print_on(tty);
397 }
398 if (result.not_null()) {
399 #ifdef ASSERT
400 ResourceMark rm(THREAD);
401
402 TempNewSymbol basic_signature =
403 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
404 int actual_size_of_params = result->size_of_parameters();
405 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
406 // +1 for MethodHandle.this, +1 for trailing MethodType
407 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
408 if (appendix.not_null()) expected_size_of_params += 1;
409 if (actual_size_of_params != expected_size_of_params) {
410 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
411 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
412 result->print();
413 }
414 assert(actual_size_of_params == expected_size_of_params,
415 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
416 #endif //ASSERT
417
418 assert(appendix_result_or_null != NULL, "");
419 (*appendix_result_or_null) = appendix;
420 (*method_type_result) = method_type;
421 return;
422 }
423 }
424 }
425 }
426
427 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
428 KlassHandle resolved_klass,
429 KlassHandle sel_klass,
430 methodHandle sel_method,
431 TRAPS) {
432
433 AccessFlags flags = sel_method->access_flags();
434
435 // Special case: arrays always override "clone". JVMS 2.15.
436 // If the resolved klass is an array class, and the declaring class
437 // is java.lang.Object and the method is "clone", set the flags
438 // to public.
439 //
440 // We'll check for the method name first, as that's most likely
441 // to be false (so we'll short-circuit out of these tests).
442 if (sel_method->name() == vmSymbols::clone_name() &&
443 sel_klass() == SystemDictionary::Object_klass() &&
444 resolved_klass->oop_is_array()) {
445 // We need to change "protected" to "public".
446 assert(flags.is_protected(), "clone not protected?");
447 jint new_flags = flags.as_int();
448 new_flags = new_flags & (~JVM_ACC_PROTECTED);
449 new_flags = new_flags | JVM_ACC_PUBLIC;
450 flags.set_flags(new_flags);
451 }
452 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
453
454 if (!Reflection::verify_field_access(ref_klass(),
455 resolved_klass(),
456 sel_klass(),
457 flags,
458 true)) {
459 ResourceMark rm(THREAD);
460 Exceptions::fthrow(
461 THREAD_AND_LOCATION,
462 vmSymbols::java_lang_IllegalAccessError(),
463 "tried to access method %s.%s%s from class %s",
464 sel_klass->external_name(),
465 sel_method->name()->as_C_string(),
466 sel_method->signature()->as_C_string(),
467 ref_klass->external_name()
468 );
469 return;
470 }
471 }
472
473 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
474 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
475 // This method is used only
476 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
477 // and
478 // (2) in Bytecode_invoke::static_target
479 // It appears to fail when applied to an invokeinterface call site.
480 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
481 // resolve klass
482 if (code == Bytecodes::_invokedynamic) {
483 resolved_klass = SystemDictionary::MethodHandle_klass();
484 Symbol* method_name = vmSymbols::invoke_name();
485 Symbol* method_signature = pool->signature_ref_at(index);
486 KlassHandle current_klass(THREAD, pool->pool_holder());
487 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
488 return;
489 }
490
491 resolve_klass(resolved_klass, pool, index, CHECK);
492
493 Symbol* method_name = pool->name_ref_at(index);
494 Symbol* method_signature = pool->signature_ref_at(index);
495 KlassHandle current_klass(THREAD, pool->pool_holder());
496
497 if (pool->has_preresolution()
498 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
499 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
500 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
501 if (result_oop != NULL) {
502 resolved_method = methodHandle(THREAD, result_oop);
503 return;
504 }
505 }
506
507 if (code == Bytecodes::_invokeinterface) {
508 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
509 } else if (code == Bytecodes::_invokevirtual) {
510 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
511 } else if (!resolved_klass->is_interface()) {
512 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
513 } else {
514 bool nostatics = (code == Bytecodes::_invokestatic) ? false : true;
515 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, nostatics, CHECK);
516 }
517 }
518
519 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
520 Symbol* method_name, Symbol* method_signature,
521 KlassHandle current_klass, bool check_access,
522 bool require_methodref, TRAPS) {
523
524 Handle nested_exception;
525
526 // 1. check if methodref required, that resolved_klass is not interfacemethodref
527 if (require_methodref && resolved_klass->is_interface()) {
528 ResourceMark rm(THREAD);
529 char buf[200];
530 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
531 resolved_klass()->external_name());
532 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
533 }
534
535 // 2. lookup method in resolved klass and its super klasses
536 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, true, false, CHECK);
537
538 if (resolved_method.is_null()) { // not found in the class hierarchy
539 // 3. lookup method in all the interfaces implemented by the resolved klass
540 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
541
542 if (resolved_method.is_null()) {
543 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
544 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
545 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
546 if (HAS_PENDING_EXCEPTION) {
547 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
548 CLEAR_PENDING_EXCEPTION;
549 }
550 }
551
552 if (resolved_method.is_null()) {
553 // 4. method lookup failed
554 ResourceMark rm(THREAD);
555 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
556 Method::name_and_sig_as_C_string(resolved_klass(),
557 method_name,
558 method_signature),
559 nested_exception);
560 }
561 }
562
563 // 5. check if method is concrete
564 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
565 ResourceMark rm(THREAD);
566 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
567 Method::name_and_sig_as_C_string(resolved_klass(),
568 method_name,
569 method_signature));
570 }
571
572 // 6. access checks, access checking may be turned off when calling from within the VM.
573 if (check_access) {
574 assert(current_klass.not_null() , "current_klass should not be null");
575
576 // check if method can be accessed by the referring class
577 check_method_accessability(current_klass,
578 resolved_klass,
579 KlassHandle(THREAD, resolved_method->method_holder()),
580 resolved_method,
581 CHECK);
582
583 // check loader constraints
584 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
585 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
586 {
587 ResourceMark rm(THREAD);
588 Symbol* failed_type_symbol =
589 SystemDictionary::check_signature_loaders(method_signature, loader,
590 class_loader, true, CHECK);
591 if (failed_type_symbol != NULL) {
592 const char* msg = "loader constraint violation: when resolving method"
593 " \"%s\" the class loader (instance of %s) of the current class, %s,"
594 " and the class loader (instance of %s) for the method's defining class, %s, have"
595 " different Class objects for the type %s used in the signature";
596 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
597 const char* loader1 = SystemDictionary::loader_name(loader());
598 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
599 const char* loader2 = SystemDictionary::loader_name(class_loader());
600 char* target = InstanceKlass::cast(resolved_method->method_holder())
601 ->name()->as_C_string();
602 char* failed_type_name = failed_type_symbol->as_C_string();
603 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
604 strlen(current) + strlen(loader2) + strlen(target) +
605 strlen(failed_type_name) + 1;
606 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
607 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
608 target, failed_type_name);
609 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
610 }
611 }
612 }
613 }
614
615 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
616 KlassHandle resolved_klass,
617 Symbol* method_name,
618 Symbol* method_signature,
619 KlassHandle current_klass,
620 bool check_access,
621 bool nostatics, TRAPS) {
622
623 // check if klass is interface
624 if (!resolved_klass->is_interface()) {
625 ResourceMark rm(THREAD);
626 char buf[200];
627 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
628 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
629 }
630
631 // lookup method in this interface or its super, java.lang.Object
632 // JDK8: also look for static methods
633 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, false, true, CHECK);
634
635 if (resolved_method.is_null()) {
636 // lookup method in all the super-interfaces
637 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
638 if (resolved_method.is_null()) {
639 // no method found
640 ResourceMark rm(THREAD);
641 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
642 Method::name_and_sig_as_C_string(resolved_klass(),
643 method_name,
644 method_signature));
645 }
646 }
647
648 if (nostatics && resolved_method->is_static()) {
649 ResourceMark rm(THREAD);
650 char buf[200];
651 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
652 resolved_method->name(),
653 resolved_method->signature()));
654 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
655 }
656
657
658 if (check_access) {
659 // JDK8 adds non-public interface methods, and accessability check requirement
660 assert(current_klass.not_null() , "current_klass should not be null");
661
662 // check if method can be accessed by the referring class
663 check_method_accessability(current_klass,
664 resolved_klass,
665 KlassHandle(THREAD, resolved_method->method_holder()),
666 resolved_method,
667 CHECK);
668
669 HandleMark hm(THREAD);
670 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
671 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
672 {
673 ResourceMark rm(THREAD);
674 Symbol* failed_type_symbol =
675 SystemDictionary::check_signature_loaders(method_signature, loader,
676 class_loader, true, CHECK);
677 if (failed_type_symbol != NULL) {
678 const char* msg = "loader constraint violation: when resolving "
679 "interface method \"%s\" the class loader (instance of %s) of the "
680 "current class, %s, and the class loader (instance of %s) for "
681 "the method's defining class, %s, have different Class objects for the type %s "
682 "used in the signature";
683 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
684 const char* loader1 = SystemDictionary::loader_name(loader());
685 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
686 const char* loader2 = SystemDictionary::loader_name(class_loader());
687 char* target = InstanceKlass::cast(resolved_method->method_holder())
688 ->name()->as_C_string();
689 char* failed_type_name = failed_type_symbol->as_C_string();
690 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
691 strlen(current) + strlen(loader2) + strlen(target) +
692 strlen(failed_type_name) + 1;
693 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
694 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
695 target, failed_type_name);
696 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
697 }
698 }
699 }
700
701 if (TraceItables && Verbose) {
702 ResourceMark rm(THREAD);
703 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
704 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
705 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
706 Method::name_and_sig_as_C_string(resolved_klass(),
707 resolved_method->name(),
708 resolved_method->signature()),
709 resolved_method->method_holder()->internal_name()
710 );
711 resolved_method->access_flags().print_on(tty);
712 if (resolved_method->is_default_method()) {
713 tty->print("default ");
714 }
715 if (resolved_method->is_overpass()) {
716 tty->print("overpass");
717 }
718 tty->cr();
719 }
720 }
721
722 //------------------------------------------------------------------------------------------------------------------------
723 // Field resolution
724
725 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
726 KlassHandle resolved_klass,
727 KlassHandle sel_klass,
728 fieldDescriptor& fd,
729 TRAPS) {
730 if (!Reflection::verify_field_access(ref_klass(),
731 resolved_klass(),
732 sel_klass(),
733 fd.access_flags(),
734 true)) {
735 ResourceMark rm(THREAD);
736 Exceptions::fthrow(
737 THREAD_AND_LOCATION,
738 vmSymbols::java_lang_IllegalAccessError(),
739 "tried to access field %s.%s from class %s",
740 sel_klass->external_name(),
741 fd.name()->as_C_string(),
742 ref_klass->external_name()
743 );
744 return;
745 }
746 }
747
748 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
749 // Load these early in case the resolve of the containing klass fails
750 Symbol* field = pool->name_ref_at(index);
751 Symbol* sig = pool->signature_ref_at(index);
752
753 // resolve specified klass
754 KlassHandle resolved_klass;
755 resolve_klass(resolved_klass, pool, index, CHECK);
756
757 KlassHandle current_klass(THREAD, pool->pool_holder());
758 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
759 }
760
761 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
762 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
763 TRAPS) {
764 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
765 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
766 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
767
768 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
769 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
770
771 // Check if there's a resolved klass containing the field
772 if (resolved_klass.is_null()) {
773 ResourceMark rm(THREAD);
774 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
775 }
776
777 // Resolve instance field
778 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
779 // check if field exists; i.e., if a klass containing the field def has been selected
780 if (sel_klass.is_null()) {
781 ResourceMark rm(THREAD);
782 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
783 }
784
785 if (!check_access)
786 // Access checking may be turned off when calling from within the VM.
787 return;
788
789 // check access
790 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
791
792 // check for errors
793 if (is_static != fd.is_static()) {
794 ResourceMark rm(THREAD);
795 char msg[200];
796 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
797 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
798 }
799
800 // Final fields can only be accessed from its own class.
801 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
802 THROW(vmSymbols::java_lang_IllegalAccessError());
803 }
804
805 // initialize resolved_klass if necessary
806 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
807 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
808 //
809 // note 2: we don't want to force initialization if we are just checking
810 // if the field access is legal; e.g., during compilation
811 if (is_static && initialize_class) {
812 sel_klass->initialize(CHECK);
813 }
814
815 if (sel_klass() != current_klass()) {
816 HandleMark hm(THREAD);
817 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
818 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
819 {
820 ResourceMark rm(THREAD);
821 Symbol* failed_type_symbol =
822 SystemDictionary::check_signature_loaders(sig,
823 ref_loader, sel_loader,
824 false,
825 CHECK);
826 if (failed_type_symbol != NULL) {
827 const char* msg = "loader constraint violation: when resolving field"
828 " \"%s\" the class loader (instance of %s) of the referring class, "
829 "%s, and the class loader (instance of %s) for the field's resolved "
830 "type, %s, have different Class objects for that type";
831 char* field_name = field->as_C_string();
832 const char* loader1 = SystemDictionary::loader_name(ref_loader());
833 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
834 const char* loader2 = SystemDictionary::loader_name(sel_loader());
835 char* failed_type_name = failed_type_symbol->as_C_string();
836 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
837 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
838 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
839 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
840 failed_type_name);
841 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
842 }
843 }
844 }
845
846 // return information. note that the klass is set to the actual klass containing the
847 // field, otherwise access of static fields in superclasses will not work.
848 }
849
850
851 //------------------------------------------------------------------------------------------------------------------------
852 // Invoke resolution
853 //
854 // Naming conventions:
855 //
856 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
857 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
858 // resolved_klass the specified klass (i.e., specified via constant pool index)
859 // recv_klass the receiver klass
860
861
862 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
863 Symbol* method_signature, KlassHandle current_klass,
864 bool check_access, bool initialize_class, TRAPS) {
865 methodHandle resolved_method;
866 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
867 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
868
869 // Initialize klass (this should only happen if everything is ok)
870 if (initialize_class && resolved_klass->should_be_initialized()) {
871 resolved_klass->initialize(CHECK);
872 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
873 }
874
875 // setup result
876 result.set_static(resolved_klass, resolved_method, CHECK);
877 }
878
879 // throws linktime exceptions
880 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
881 Symbol* method_name, Symbol* method_signature,
882 KlassHandle current_klass, bool check_access, TRAPS) {
883
884 if (!resolved_klass->is_interface()) {
885 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
886 } else {
887 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
888 }
889 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
890
891 // check if static
892 if (!resolved_method->is_static()) {
893 ResourceMark rm(THREAD);
894 char buf[200];
895 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
896 resolved_method->name(),
897 resolved_method->signature()));
898 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
899 }
900 }
901
902
903 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
904 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
905 methodHandle resolved_method;
906 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
907 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
908 }
909
910 // throws linktime exceptions
911 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
912 Symbol* method_name, Symbol* method_signature,
913 KlassHandle current_klass, bool check_access, TRAPS) {
914
915 // Invokespecial is called for multiple special reasons:
916 // <init>
917 // local private method invocation, for classes and interfaces
918 // superclass.method, which can also resolve to a default method
919 // and the selected method is recalculated relative to the direct superclass
920 // superinterface.method, which explicitly does not check shadowing
921
922 if (!resolved_klass->is_interface()) {
923 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
924 } else {
925 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
926 }
927
928 // check if method name is <init>, that it is found in same klass as static type
929 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
930 resolved_method->method_holder() != resolved_klass()) {
931 ResourceMark rm(THREAD);
932 Exceptions::fthrow(
933 THREAD_AND_LOCATION,
934 vmSymbols::java_lang_NoSuchMethodError(),
935 "%s: method %s%s not found",
936 resolved_klass->external_name(),
937 resolved_method->name()->as_C_string(),
938 resolved_method->signature()->as_C_string()
939 );
940 return;
941 }
942
943 // check if invokespecial's interface method reference is in an indirect superinterface
944 if (!current_klass.is_null() && resolved_klass->is_interface()) {
945 Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ?
946 current_klass() :
947 InstanceKlass::cast(current_klass())->host_klass();
948 // As of the fix for 4486457 we disable verification for all of the
949 // dynamically-generated bytecodes associated with the 1.4
950 // reflection implementation, not just those associated with
951 // sun/reflect/SerializationConstructorAccessor.
952 bool is_reflect = JDK_Version::is_gte_jdk14x_version() &&
953 UseNewReflection &&
954 klass_to_check->is_subclass_of(
955 SystemDictionary::reflect_MagicAccessorImpl_klass());
956
957 if (!is_reflect &&
958 !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) {
959 ResourceMark rm(THREAD);
960 char buf[200];
961 jio_snprintf(buf, sizeof(buf),
962 "Interface method reference: %s, is in an indirect superinterface of %s",
963 Method::name_and_sig_as_C_string(resolved_klass(),
964 resolved_method->name(),
965 resolved_method->signature()),
966 current_klass->external_name());
967 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
968 }
969 }
970
971 // check if not static
972 if (resolved_method->is_static()) {
973 ResourceMark rm(THREAD);
974 char buf[200];
975 jio_snprintf(buf, sizeof(buf),
976 "Expecting non-static method %s",
977 Method::name_and_sig_as_C_string(resolved_klass(),
978 resolved_method->name(),
979 resolved_method->signature()));
980 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
981 }
982
983 if (TraceItables && Verbose) {
984 ResourceMark rm(THREAD);
985 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
986 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
987 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
988 Method::name_and_sig_as_C_string(resolved_klass(),
989 resolved_method->name(),
990 resolved_method->signature()),
991 resolved_method->method_holder()->internal_name()
992 );
993 resolved_method->access_flags().print_on(tty);
994 if (resolved_method->is_default_method()) {
995 tty->print("default ");
996 }
997 if (resolved_method->is_overpass()) {
998 tty->print("overpass");
999 }
1000 tty->cr();
1001 }
1002 }
1003
1004 // throws runtime exceptions
1005 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1006 KlassHandle current_klass, bool check_access, TRAPS) {
1007
1008 // resolved method is selected method unless we have an old-style lookup
1009 // for a superclass method
1010 // Invokespecial for a superinterface, resolved method is selected method,
1011 // no checks for shadowing
1012 methodHandle sel_method(THREAD, resolved_method());
1013
1014 // check if this is an old-style super call and do a new lookup if so
1015 { KlassHandle method_klass = KlassHandle(THREAD,
1016 resolved_method->method_holder());
1017
1018 if (check_access &&
1019 // a) check if ACC_SUPER flag is set for the current class
1020 (current_klass->is_super() || !AllowNonVirtualCalls) &&
1021 // b) check if the class of the resolved_klass is a superclass
1022 // (not supertype in order to exclude interface classes) of the current class.
1023 // This check is not performed for super.invoke for interface methods
1024 // in super interfaces.
1025 current_klass->is_subclass_of(resolved_klass()) &&
1026 current_klass() != resolved_klass() &&
1027 // c) check if the method is not <init>
1028 resolved_method->name() != vmSymbols::object_initializer_name()) {
1029 // Lookup super method
1030 KlassHandle super_klass(THREAD, current_klass->super());
1031 lookup_instance_method_in_klasses(sel_method, super_klass,
1032 resolved_method->name(),
1033 resolved_method->signature(), CHECK);
1034 // check if found
1035 if (sel_method.is_null()) {
1036 ResourceMark rm(THREAD);
1037 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1038 Method::name_and_sig_as_C_string(resolved_klass(),
1039 resolved_method->name(),
1040 resolved_method->signature()));
1041 }
1042 }
1043 }
1044
1045 // check if not static
1046 if (sel_method->is_static()) {
1047 ResourceMark rm(THREAD);
1048 char buf[200];
1049 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1050 resolved_method->name(),
1051 resolved_method->signature()));
1052 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1053 }
1054
1055 // check if abstract
1056 if (sel_method->is_abstract()) {
1057 ResourceMark rm(THREAD);
1058 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1059 Method::name_and_sig_as_C_string(resolved_klass(),
1060 sel_method->name(),
1061 sel_method->signature()));
1062 }
1063
1064 if (TraceItables && Verbose) {
1065 ResourceMark rm(THREAD);
1066 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1067 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1068 Method::name_and_sig_as_C_string(resolved_klass(),
1069 sel_method->name(),
1070 sel_method->signature()),
1071 sel_method->method_holder()->internal_name()
1072 );
1073 sel_method->access_flags().print_on(tty);
1074 if (sel_method->is_default_method()) {
1075 tty->print("default ");
1076 }
1077 if (sel_method->is_overpass()) {
1078 tty->print("overpass");
1079 }
1080 tty->cr();
1081 }
1082
1083 // setup result
1084 result.set_static(resolved_klass, sel_method, CHECK);
1085 }
1086
1087 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
1088 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1089 bool check_access, bool check_null_and_abstract, TRAPS) {
1090 methodHandle resolved_method;
1091 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1092 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
1093 }
1094
1095 // throws linktime exceptions
1096 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
1097 Symbol* method_name, Symbol* method_signature,
1098 KlassHandle current_klass, bool check_access, TRAPS) {
1099 // normal method resolution
1100 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1101
1102 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1103 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1104
1105 // check if private interface method
1106 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1107 ResourceMark rm(THREAD);
1108 char buf[200];
1109 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1110 Method::name_and_sig_as_C_string(resolved_klass(),
1111 resolved_method->name(),
1112 resolved_method->signature()),
1113 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
1114 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1115 }
1116
1117 // check if not static
1118 if (resolved_method->is_static()) {
1119 ResourceMark rm(THREAD);
1120 char buf[200];
1121 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1122 resolved_method->name(),
1123 resolved_method->signature()));
1124 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1125 }
1126
1127 if (PrintVtables && Verbose) {
1128 ResourceMark rm(THREAD);
1129 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
1130 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
1131 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1132 Method::name_and_sig_as_C_string(resolved_klass(),
1133 resolved_method->name(),
1134 resolved_method->signature()),
1135 resolved_method->method_holder()->internal_name()
1136 );
1137 resolved_method->access_flags().print_on(tty);
1138 if (resolved_method->is_default_method()) {
1139 tty->print("default ");
1140 }
1141 if (resolved_method->is_overpass()) {
1142 tty->print("overpass");
1143 }
1144 tty->cr();
1145 }
1146 }
1147
1148 // throws runtime exceptions
1149 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1150 methodHandle resolved_method,
1151 KlassHandle resolved_klass,
1152 Handle recv,
1153 KlassHandle recv_klass,
1154 bool check_null_and_abstract,
1155 TRAPS) {
1156
1157 // setup default return values
1158 int vtable_index = Method::invalid_vtable_index;
1159 methodHandle selected_method;
1160
1161 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
1162
1163 // runtime method resolution
1164 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1165 THROW(vmSymbols::java_lang_NullPointerException());
1166 }
1167
1168 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1169 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1170 // a missing receiver might result in a bogus lookup.
1171 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1172
1173 // do lookup based on receiver klass using the vtable index
1174 if (resolved_method->method_holder()->is_interface()) { // miranda method
1175 vtable_index = vtable_index_of_interface_method(resolved_klass,
1176 resolved_method);
1177 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1178
1179 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
1180 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1181 } else {
1182 // at this point we are sure that resolved_method is virtual and not
1183 // a miranda method; therefore, it must have a valid vtable index.
1184 assert(!resolved_method->has_itable_index(), "");
1185 vtable_index = resolved_method->vtable_index();
1186 // We could get a negative vtable_index for final methods,
1187 // because as an optimization they are they are never put in the vtable,
1188 // unless they override an existing method.
1189 // If we do get a negative, it means the resolved method is the the selected
1190 // method, and it can never be changed by an override.
1191 if (vtable_index == Method::nonvirtual_vtable_index) {
1192 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1193 selected_method = resolved_method;
1194 } else {
1195 // recv_klass might be an arrayKlassOop but all vtables start at
1196 // the same place. The cast is to avoid virtual call and assertion.
1197 InstanceKlass* inst = (InstanceKlass*)recv_klass();
1198 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1199 }
1200 }
1201
1202 // check if method exists
1203 if (selected_method.is_null()) {
1204 ResourceMark rm(THREAD);
1205 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1206 Method::name_and_sig_as_C_string(resolved_klass(),
1207 resolved_method->name(),
1208 resolved_method->signature()));
1209 }
1210
1211 // check if abstract
1212 if (check_null_and_abstract && selected_method->is_abstract()) {
1213 ResourceMark rm(THREAD);
1214 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1215 Method::name_and_sig_as_C_string(resolved_klass(),
1216 selected_method->name(),
1217 selected_method->signature()));
1218 }
1219
1220 if (PrintVtables && Verbose) {
1221 ResourceMark rm(THREAD);
1222 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ",
1223 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1224 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1225 Method::name_and_sig_as_C_string(resolved_klass(),
1226 resolved_method->name(),
1227 resolved_method->signature()),
1228 selected_method->method_holder()->internal_name(),
1229 vtable_index
1230 );
1231 selected_method->access_flags().print_on(tty);
1232 if (selected_method->is_default_method()) {
1233 tty->print("default ");
1234 }
1235 if (selected_method->is_overpass()) {
1236 tty->print("overpass");
1237 }
1238 tty->cr();
1239 }
1240 // setup result
1241 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1242 }
1243
1244 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
1245 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1246 bool check_access, bool check_null_and_abstract, TRAPS) {
1247 methodHandle resolved_method;
1248 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1249 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
1250 }
1251
1252 // throws linktime exceptions
1253 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
1254 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
1255 // normal interface method resolution
1256 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1257
1258 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1259 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1260 }
1261
1262 // throws runtime exceptions
1263 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1264 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
1265 // check if receiver exists
1266 if (check_null_and_abstract && recv.is_null()) {
1267 THROW(vmSymbols::java_lang_NullPointerException());
1268 }
1269
1270 // check if private interface method
1271 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1272 ResourceMark rm(THREAD);
1273 char buf[200];
1274 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
1275 Method::name_and_sig_as_C_string(resolved_klass(),
1276 resolved_method->name(),
1277 resolved_method->signature()));
1278 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1279 }
1280
1281 // check if receiver klass implements the resolved interface
1282 if (!recv_klass->is_subtype_of(resolved_klass())) {
1283 ResourceMark rm(THREAD);
1284 char buf[200];
1285 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1286 recv_klass()->external_name(),
1287 resolved_klass()->external_name());
1288 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1289 }
1290 // do lookup based on receiver klass
1291 methodHandle sel_method;
1292 lookup_instance_method_in_klasses(sel_method, recv_klass,
1293 resolved_method->name(),
1294 resolved_method->signature(), CHECK);
1295 if (sel_method.is_null() && !check_null_and_abstract) {
1296 // In theory this is a harmless placeholder value, but
1297 // in practice leaving in null affects the nsk default method tests.
1298 // This needs further study.
1299 sel_method = resolved_method;
1300 }
1301 // check if method exists
1302 if (sel_method.is_null()) {
1303 ResourceMark rm(THREAD);
1304 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1305 Method::name_and_sig_as_C_string(recv_klass(),
1306 resolved_method->name(),
1307 resolved_method->signature()));
1308 }
1309 // check access
1310 // Throw Illegal Access Error if sel_method is not public.
1311 if (!sel_method->is_public()) {
1312 ResourceMark rm(THREAD);
1313 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1314 Method::name_and_sig_as_C_string(recv_klass(),
1315 sel_method->name(),
1316 sel_method->signature()));
1317 }
1318 // check if abstract
1319 if (check_null_and_abstract && sel_method->is_abstract()) {
1320 ResourceMark rm(THREAD);
1321 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1322 Method::name_and_sig_as_C_string(recv_klass(),
1323 sel_method->name(),
1324 sel_method->signature()));
1325 }
1326
1327 if (TraceItables && Verbose) {
1328 ResourceMark rm(THREAD);
1329 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1330 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1331 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1332 Method::name_and_sig_as_C_string(resolved_klass(),
1333 resolved_method->name(),
1334 resolved_method->signature()),
1335 sel_method->method_holder()->internal_name()
1336 );
1337 sel_method->access_flags().print_on(tty);
1338 if (sel_method->is_default_method()) {
1339 tty->print("default ");
1340 }
1341 if (sel_method->is_overpass()) {
1342 tty->print("overpass");
1343 }
1344 tty->cr();
1345 }
1346 // setup result
1347 if (!resolved_method->has_itable_index()) {
1348 int vtable_index = resolved_method->vtable_index();
1349 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1350 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1351 } else {
1352 int itable_index = resolved_method()->itable_index();
1353 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1354 }
1355 }
1356
1357
1358 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1359 KlassHandle resolved_klass,
1360 Symbol* method_name,
1361 Symbol* method_signature,
1362 KlassHandle current_klass,
1363 bool check_access) {
1364 EXCEPTION_MARK;
1365 methodHandle method_result;
1366 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1367 if (HAS_PENDING_EXCEPTION) {
1368 CLEAR_PENDING_EXCEPTION;
1369 return methodHandle();
1370 } else {
1371 return method_result;
1372 }
1373 }
1374
1375 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1376 KlassHandle resolved_klass,
1377 Symbol* method_name,
1378 Symbol* method_signature,
1379 KlassHandle current_klass,
1380 bool check_access) {
1381 EXCEPTION_MARK;
1382 methodHandle method_result;
1383 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1384 if (HAS_PENDING_EXCEPTION) {
1385 CLEAR_PENDING_EXCEPTION;
1386 return methodHandle();
1387 } else {
1388 return method_result;
1389 }
1390 }
1391
1392 methodHandle LinkResolver::resolve_virtual_call_or_null(
1393 KlassHandle receiver_klass,
1394 KlassHandle resolved_klass,
1395 Symbol* name,
1396 Symbol* signature,
1397 KlassHandle current_klass) {
1398 EXCEPTION_MARK;
1399 CallInfo info;
1400 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1401 if (HAS_PENDING_EXCEPTION) {
1402 CLEAR_PENDING_EXCEPTION;
1403 return methodHandle();
1404 }
1405 return info.selected_method();
1406 }
1407
1408 methodHandle LinkResolver::resolve_interface_call_or_null(
1409 KlassHandle receiver_klass,
1410 KlassHandle resolved_klass,
1411 Symbol* name,
1412 Symbol* signature,
1413 KlassHandle current_klass) {
1414 EXCEPTION_MARK;
1415 CallInfo info;
1416 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1417 if (HAS_PENDING_EXCEPTION) {
1418 CLEAR_PENDING_EXCEPTION;
1419 return methodHandle();
1420 }
1421 return info.selected_method();
1422 }
1423
1424 int LinkResolver::resolve_virtual_vtable_index(
1425 KlassHandle receiver_klass,
1426 KlassHandle resolved_klass,
1427 Symbol* name,
1428 Symbol* signature,
1429 KlassHandle current_klass) {
1430 EXCEPTION_MARK;
1431 CallInfo info;
1432 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1433 if (HAS_PENDING_EXCEPTION) {
1434 CLEAR_PENDING_EXCEPTION;
1435 return Method::invalid_vtable_index;
1436 }
1437 return info.vtable_index();
1438 }
1439
1440 methodHandle LinkResolver::resolve_static_call_or_null(
1441 KlassHandle resolved_klass,
1442 Symbol* name,
1443 Symbol* signature,
1444 KlassHandle current_klass) {
1445 EXCEPTION_MARK;
1446 CallInfo info;
1447 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1448 if (HAS_PENDING_EXCEPTION) {
1449 CLEAR_PENDING_EXCEPTION;
1450 return methodHandle();
1451 }
1452 return info.selected_method();
1453 }
1454
1455 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1456 KlassHandle current_klass) {
1457 EXCEPTION_MARK;
1458 CallInfo info;
1459 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1460 if (HAS_PENDING_EXCEPTION) {
1461 CLEAR_PENDING_EXCEPTION;
1462 return methodHandle();
1463 }
1464 return info.selected_method();
1465 }
1466
1467
1468
1469 //------------------------------------------------------------------------------------------------------------------------
1470 // ConstantPool entries
1471
1472 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1473 switch (byte) {
1474 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1475 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1476 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1477 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1478 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1479 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1480 }
1481 return;
1482 }
1483
1484 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1485 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1486 // resolve klass
1487 resolve_klass(resolved_klass, pool, index, CHECK);
1488
1489 // Get name, signature, and static klass
1490 method_name = pool->name_ref_at(index);
1491 method_signature = pool->signature_ref_at(index);
1492 current_klass = KlassHandle(THREAD, pool->pool_holder());
1493 }
1494
1495
1496 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1497 KlassHandle resolved_klass;
1498 Symbol* method_name = NULL;
1499 Symbol* method_signature = NULL;
1500 KlassHandle current_klass;
1501 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1502 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1503 }
1504
1505
1506 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1507 KlassHandle resolved_klass;
1508 Symbol* method_name = NULL;
1509 Symbol* method_signature = NULL;
1510 KlassHandle current_klass;
1511 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1512 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1513 }
1514
1515
1516 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1517 constantPoolHandle pool, int index,
1518 TRAPS) {
1519
1520 KlassHandle resolved_klass;
1521 Symbol* method_name = NULL;
1522 Symbol* method_signature = NULL;
1523 KlassHandle current_klass;
1524 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1525 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1526 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1527 }
1528
1529
1530 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1531 KlassHandle resolved_klass;
1532 Symbol* method_name = NULL;
1533 Symbol* method_signature = NULL;
1534 KlassHandle current_klass;
1535 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1536 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1537 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1538 }
1539
1540
1541 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1542 assert(EnableInvokeDynamic, "");
1543 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1544 KlassHandle resolved_klass;
1545 Symbol* method_name = NULL;
1546 Symbol* method_signature = NULL;
1547 KlassHandle current_klass;
1548 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1549 if (TraceMethodHandles) {
1550 ResourceMark rm(THREAD);
1551 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1552 }
1553 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1554 }
1555
1556 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1557 Symbol* method_name, Symbol* method_signature,
1558 KlassHandle current_klass,
1559 TRAPS) {
1560 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1561 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1562 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1563 methodHandle resolved_method;
1564 Handle resolved_appendix;
1565 Handle resolved_method_type;
1566 lookup_polymorphic_method(resolved_method, resolved_klass,
1567 method_name, method_signature,
1568 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1569 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1570 }
1571
1572
1573 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1574 assert(EnableInvokeDynamic, "");
1575
1576 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1577 Symbol* method_name = pool->name_ref_at(index);
1578 Symbol* method_signature = pool->signature_ref_at(index);
1579 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1580
1581 // Resolve the bootstrap specifier (BSM + optional arguments).
1582 Handle bootstrap_specifier;
1583 // Check if CallSite has been bound already:
1584 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1585 if (cpce->is_f1_null()) {
1586 int pool_index = cpce->constant_pool_index();
1587 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1588 assert(bsm_info != NULL, "");
1589 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1590 bootstrap_specifier = Handle(THREAD, bsm_info);
1591 }
1592 if (!cpce->is_f1_null()) {
1593 methodHandle method( THREAD, cpce->f1_as_method());
1594 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1595 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1596 result.set_handle(method, appendix, method_type, CHECK);
1597 return;
1598 }
1599
1600 if (TraceMethodHandles) {
1601 ResourceMark rm(THREAD);
1602 tty->print_cr("resolve_invokedynamic #%d %s %s",
1603 ConstantPool::decode_invokedynamic_index(index),
1604 method_name->as_C_string(), method_signature->as_C_string());
1605 tty->print(" BSM info: "); bootstrap_specifier->print();
1606 }
1607
1608 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1609 }
1610
1611 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1612 Handle bootstrap_specifier,
1613 Symbol* method_name, Symbol* method_signature,
1614 KlassHandle current_klass,
1615 TRAPS) {
1616 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1617 // The appendix argument is likely to be a freshly-created CallSite.
1618 Handle resolved_appendix;
1619 Handle resolved_method_type;
1620 methodHandle resolved_method =
1621 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1622 bootstrap_specifier,
1623 method_name, method_signature,
1624 &resolved_appendix,
1625 &resolved_method_type,
1626 THREAD);
1627 if (HAS_PENDING_EXCEPTION) {
1628 if (TraceMethodHandles) {
1629 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION);
1630 PENDING_EXCEPTION->print();
1631 }
1632 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1633 // throw these guys, since they are already wrapped
1634 return;
1635 }
1636 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1637 // intercept only LinkageErrors which might have failed to wrap
1638 return;
1639 }
1640 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1641 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1642 CLEAR_PENDING_EXCEPTION;
1643 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1644 }
1645 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1646 }
1647
1648 //------------------------------------------------------------------------------------------------------------------------
1649 #ifndef PRODUCT
1650
1651 void CallInfo::print() {
1652 ResourceMark rm;
1653 const char* kindstr = "unknown";
1654 switch (_call_kind) {
1655 case direct_call: kindstr = "direct"; break;
1656 case vtable_call: kindstr = "vtable"; break;
1657 case itable_call: kindstr = "itable"; break;
1658 }
1659 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
1660 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
1661 }
1662
1663 #endif