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src/share/vm/interpreter/linkResolver.cpp@da862781b584
src/share/vm/interpreter/linkResolver.cpp
Thu, 21 Nov 2013 12:30:35 -0800
- author
- kvn
- date
- Thu, 21 Nov 2013 12:30:35 -0800
- changeset 6485
- da862781b584
- parent 6080
- fce21ac5968d
- child 6132
- 22eaa15b7960
- permissions
- -rw-r--r--
Merge
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 */
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"
50 //------------------------------------------------------------------------------------------------------------------------
51 // Implementation of CallInfo
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 }
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 }
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 }
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 }
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
110 if (CompilationPolicy::must_be_compiled(selected_method)) {
111 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
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 }
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");
162 kind = CallInfo::vtable_call;
163 } else if (resolved_method->has_vtable_index()) {
164 // Can occur if an interface redeclares a method of Object.
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
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 }
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
214 //------------------------------------------------------------------------------------------------------------------------
215 // Klass resolution
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 }
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 }
238 //------------------------------------------------------------------------------------------------------------------------
239 // Method resolution
240 //
241 // According to JVM spec. $5.4.3c & $5.4.3d
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, TRAPS) {
246 Method* result_oop = klass->uncached_lookup_method(name, signature);
247 if (result_oop == NULL) {
248 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
249 if (default_methods != NULL) {
250 result_oop = InstanceKlass::find_method(default_methods, name, signature);
251 }
252 }
254 if (EnableInvokeDynamic && result_oop != NULL) {
255 vmIntrinsics::ID iid = result_oop->intrinsic_id();
256 if (MethodHandles::is_signature_polymorphic(iid)) {
257 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
258 return;
259 }
260 }
261 result = methodHandle(THREAD, result_oop);
262 }
264 // returns first instance method
265 // Looks up method in classes, then looks up local default methods
266 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
267 Method* result_oop = klass->uncached_lookup_method(name, signature);
268 result = methodHandle(THREAD, result_oop);
269 while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
270 klass = KlassHandle(THREAD, result->method_holder()->super());
271 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));
272 }
274 if (result.is_null()) {
275 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
276 if (default_methods != NULL) {
277 result = methodHandle(InstanceKlass::find_method(default_methods, name, signature));
278 assert(result.is_null() || !result->is_static(), "static defaults not allowed");
279 }
280 }
281 }
283 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
284 methodHandle resolved_method) {
286 int vtable_index = Method::invalid_vtable_index;
287 Symbol* name = resolved_method->name();
288 Symbol* signature = resolved_method->signature();
290 // First check in default method array
291 if (!resolved_method->is_abstract() &&
292 (InstanceKlass::cast(klass())->default_methods() != NULL)) {
293 int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature);
294 if (index >= 0 ) {
295 vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
296 }
297 }
298 if (vtable_index == Method::invalid_vtable_index) {
299 // get vtable_index for miranda methods
300 ResourceMark rm;
301 klassVtable *vt = InstanceKlass::cast(klass())->vtable();
302 vtable_index = vt->index_of_miranda(name, signature);
303 }
304 return vtable_index;
305 }
307 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
308 InstanceKlass *ik = InstanceKlass::cast(klass());
309 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));
310 }
312 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
313 KlassHandle klass, Symbol* name, Symbol* full_signature,
314 KlassHandle current_klass,
315 Handle *appendix_result_or_null,
316 Handle *method_type_result,
317 TRAPS) {
318 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
319 if (TraceMethodHandles) {
320 ResourceMark rm(THREAD);
321 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
322 vmIntrinsics::name_at(iid), klass->external_name(),
323 name->as_C_string(), full_signature->as_C_string());
324 }
325 if (EnableInvokeDynamic &&
326 klass() == SystemDictionary::MethodHandle_klass() &&
327 iid != vmIntrinsics::_none) {
328 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
329 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
330 // Do not erase last argument type (MemberName) if it is a static linkTo method.
331 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
332 TempNewSymbol basic_signature =
333 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
334 if (TraceMethodHandles) {
335 ResourceMark rm(THREAD);
336 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
337 name->as_C_string(),
338 full_signature->as_C_string(),
339 basic_signature->as_C_string());
340 }
341 result = SystemDictionary::find_method_handle_intrinsic(iid,
342 basic_signature,
343 CHECK);
344 if (result.not_null()) {
345 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
346 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
347 assert(basic_signature == result->signature(), "predict the result signature");
348 if (TraceMethodHandles) {
349 tty->print("lookup_polymorphic_method => intrinsic ");
350 result->print_on(tty);
351 }
352 return;
353 }
354 } else if (iid == vmIntrinsics::_invokeGeneric
355 && !THREAD->is_Compiler_thread()
356 && appendix_result_or_null != NULL) {
357 // This is a method with type-checking semantics.
358 // We will ask Java code to spin an adapter method for it.
359 if (!MethodHandles::enabled()) {
360 // Make sure the Java part of the runtime has been booted up.
361 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
362 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
363 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
364 Handle(),
365 Handle(),
366 true,
367 CHECK);
368 }
369 }
371 Handle appendix;
372 Handle method_type;
373 result = SystemDictionary::find_method_handle_invoker(name,
374 full_signature,
375 current_klass,
376 &appendix,
377 &method_type,
378 CHECK);
379 if (TraceMethodHandles) {
380 tty->print("lookup_polymorphic_method => (via Java) ");
381 result->print_on(tty);
382 tty->print(" lookup_polymorphic_method => appendix = ");
383 if (appendix.is_null()) tty->print_cr("(none)");
384 else appendix->print_on(tty);
385 }
386 if (result.not_null()) {
387 #ifdef ASSERT
388 ResourceMark rm(THREAD);
390 TempNewSymbol basic_signature =
391 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
392 int actual_size_of_params = result->size_of_parameters();
393 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
394 // +1 for MethodHandle.this, +1 for trailing MethodType
395 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
396 if (appendix.not_null()) expected_size_of_params += 1;
397 if (actual_size_of_params != expected_size_of_params) {
398 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
399 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
400 result->print();
401 }
402 assert(actual_size_of_params == expected_size_of_params,
403 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
404 #endif //ASSERT
406 assert(appendix_result_or_null != NULL, "");
407 (*appendix_result_or_null) = appendix;
408 (*method_type_result) = method_type;
409 return;
410 }
411 }
412 }
413 }
415 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
416 KlassHandle resolved_klass,
417 KlassHandle sel_klass,
418 methodHandle sel_method,
419 TRAPS) {
421 AccessFlags flags = sel_method->access_flags();
423 // Special case #1: arrays always override "clone". JVMS 2.15.
424 // If the resolved klass is an array class, and the declaring class
425 // is java.lang.Object and the method is "clone", set the flags
426 // to public.
427 // Special case #2: If the resolved klass is an interface, and
428 // the declaring class is java.lang.Object, and the method is
429 // "clone" or "finalize", set the flags to public. If the
430 // resolved interface does not contain "clone" or "finalize"
431 // methods, the method/interface method resolution looks to
432 // the interface's super class, java.lang.Object. With JDK 8
433 // interface accessability check requirement, special casing
434 // this scenario is necessary to avoid an IAE.
435 //
436 // We'll check for each method name first and then java.lang.Object
437 // to best short-circuit out of these tests.
438 if (((sel_method->name() == vmSymbols::clone_name() &&
439 (resolved_klass->oop_is_array() || resolved_klass->is_interface())) ||
440 (sel_method->name() == vmSymbols::finalize_method_name() &&
441 resolved_klass->is_interface())) &&
442 sel_klass() == SystemDictionary::Object_klass()) {
443 // We need to change "protected" to "public".
444 assert(flags.is_protected(), "clone or finalize not protected?");
445 jint new_flags = flags.as_int();
446 new_flags = new_flags & (~JVM_ACC_PROTECTED);
447 new_flags = new_flags | JVM_ACC_PUBLIC;
448 flags.set_flags(new_flags);
449 }
450 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
452 if (!Reflection::verify_field_access(ref_klass(),
453 resolved_klass(),
454 sel_klass(),
455 flags,
456 true)) {
457 ResourceMark rm(THREAD);
458 Exceptions::fthrow(
459 THREAD_AND_LOCATION,
460 vmSymbols::java_lang_IllegalAccessError(),
461 "tried to access method %s.%s%s from class %s",
462 sel_klass->external_name(),
463 sel_method->name()->as_C_string(),
464 sel_method->signature()->as_C_string(),
465 ref_klass->external_name()
466 );
467 return;
468 }
469 }
471 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
472 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
473 // This method is used only
474 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
475 // and
476 // (2) in Bytecode_invoke::static_target
477 // It appears to fail when applied to an invokeinterface call site.
478 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
479 // resolve klass
480 if (code == Bytecodes::_invokedynamic) {
481 resolved_klass = SystemDictionary::MethodHandle_klass();
482 Symbol* method_name = vmSymbols::invoke_name();
483 Symbol* method_signature = pool->signature_ref_at(index);
484 KlassHandle current_klass(THREAD, pool->pool_holder());
485 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
486 return;
487 }
489 resolve_klass(resolved_klass, pool, index, CHECK);
491 Symbol* method_name = pool->name_ref_at(index);
492 Symbol* method_signature = pool->signature_ref_at(index);
493 KlassHandle current_klass(THREAD, pool->pool_holder());
495 if (pool->has_preresolution()
496 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
497 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
498 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
499 if (result_oop != NULL) {
500 resolved_method = methodHandle(THREAD, result_oop);
501 return;
502 }
503 }
505 if (code == Bytecodes::_invokeinterface) {
506 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
507 } else if (code == Bytecodes::_invokevirtual) {
508 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
509 } else {
510 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
511 }
512 }
514 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
515 Symbol* method_name, Symbol* method_signature,
516 KlassHandle current_klass, bool check_access,
517 bool require_methodref, TRAPS) {
519 Handle nested_exception;
521 // 1. check if methodref required, that resolved_klass is not interfacemethodref
522 if (require_methodref && resolved_klass->is_interface()) {
523 ResourceMark rm(THREAD);
524 char buf[200];
525 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
526 resolved_klass()->external_name());
527 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
528 }
530 // 2. lookup method in resolved klass and its super klasses
531 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
533 if (resolved_method.is_null()) { // not found in the class hierarchy
534 // 3. lookup method in all the interfaces implemented by the resolved klass
535 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
537 if (resolved_method.is_null()) {
538 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
539 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
540 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
541 if (HAS_PENDING_EXCEPTION) {
542 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
543 CLEAR_PENDING_EXCEPTION;
544 }
545 }
547 if (resolved_method.is_null()) {
548 // 4. method lookup failed
549 ResourceMark rm(THREAD);
550 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
551 Method::name_and_sig_as_C_string(resolved_klass(),
552 method_name,
553 method_signature),
554 nested_exception);
555 }
556 }
558 // 5. check if method is concrete
559 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
560 ResourceMark rm(THREAD);
561 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
562 Method::name_and_sig_as_C_string(resolved_klass(),
563 method_name,
564 method_signature));
565 }
567 // 6. access checks, access checking may be turned off when calling from within the VM.
568 if (check_access) {
569 assert(current_klass.not_null() , "current_klass should not be null");
571 // check if method can be accessed by the referring class
572 check_method_accessability(current_klass,
573 resolved_klass,
574 KlassHandle(THREAD, resolved_method->method_holder()),
575 resolved_method,
576 CHECK);
578 // check loader constraints
579 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
580 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
581 {
582 ResourceMark rm(THREAD);
583 Symbol* failed_type_symbol =
584 SystemDictionary::check_signature_loaders(method_signature, loader,
585 class_loader, true, CHECK);
586 if (failed_type_symbol != NULL) {
587 const char* msg = "loader constraint violation: when resolving method"
588 " \"%s\" the class loader (instance of %s) of the current class, %s,"
589 " and the class loader (instance of %s) for the method's defining class, %s, have"
590 " different Class objects for the type %s used in the signature";
591 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
592 const char* loader1 = SystemDictionary::loader_name(loader());
593 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
594 const char* loader2 = SystemDictionary::loader_name(class_loader());
595 char* target = InstanceKlass::cast(resolved_method->method_holder())
596 ->name()->as_C_string();
597 char* failed_type_name = failed_type_symbol->as_C_string();
598 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
599 strlen(current) + strlen(loader2) + strlen(target) +
600 strlen(failed_type_name) + 1;
601 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
602 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
603 target, failed_type_name);
604 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
605 }
606 }
607 }
608 }
610 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
611 KlassHandle resolved_klass,
612 Symbol* method_name,
613 Symbol* method_signature,
614 KlassHandle current_klass,
615 bool check_access, TRAPS) {
617 // check if klass is interface
618 if (!resolved_klass->is_interface()) {
619 ResourceMark rm(THREAD);
620 char buf[200];
621 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
622 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
623 }
625 // lookup method in this interface or its super, java.lang.Object
626 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
628 if (resolved_method.is_null()) {
629 // lookup method in all the super-interfaces
630 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
631 if (resolved_method.is_null()) {
632 // no method found
633 ResourceMark rm(THREAD);
634 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
635 Method::name_and_sig_as_C_string(resolved_klass(),
636 method_name,
637 method_signature));
638 }
639 }
641 if (check_access) {
642 // JDK8 adds non-public interface methods, and accessability check requirement
643 assert(current_klass.not_null() , "current_klass should not be null");
645 // check if method can be accessed by the referring class
646 check_method_accessability(current_klass,
647 resolved_klass,
648 KlassHandle(THREAD, resolved_method->method_holder()),
649 resolved_method,
650 CHECK);
652 HandleMark hm(THREAD);
653 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
654 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
655 {
656 ResourceMark rm(THREAD);
657 Symbol* failed_type_symbol =
658 SystemDictionary::check_signature_loaders(method_signature, loader,
659 class_loader, true, CHECK);
660 if (failed_type_symbol != NULL) {
661 const char* msg = "loader constraint violation: when resolving "
662 "interface method \"%s\" the class loader (instance of %s) of the "
663 "current class, %s, and the class loader (instance of %s) for "
664 "the method's defining class, %s, have different Class objects for the type %s "
665 "used in the signature";
666 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
667 const char* loader1 = SystemDictionary::loader_name(loader());
668 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
669 const char* loader2 = SystemDictionary::loader_name(class_loader());
670 char* target = InstanceKlass::cast(resolved_method->method_holder())
671 ->name()->as_C_string();
672 char* failed_type_name = failed_type_symbol->as_C_string();
673 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
674 strlen(current) + strlen(loader2) + strlen(target) +
675 strlen(failed_type_name) + 1;
676 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
677 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
678 target, failed_type_name);
679 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
680 }
681 }
682 }
684 if (TraceItables && Verbose) {
685 ResourceMark rm(THREAD);
686 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
687 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
688 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
689 Method::name_and_sig_as_C_string(resolved_klass(),
690 resolved_method->name(),
691 resolved_method->signature()),
692 resolved_method->method_holder()->internal_name()
693 );
694 resolved_method->access_flags().print_on(tty);
695 if (resolved_method->is_default_method()) {
696 tty->print("default ");
697 }
698 if (resolved_method->is_overpass()) {
699 tty->print("overpass");
700 }
701 tty->cr();
702 }
703 }
705 //------------------------------------------------------------------------------------------------------------------------
706 // Field resolution
708 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
709 KlassHandle resolved_klass,
710 KlassHandle sel_klass,
711 fieldDescriptor& fd,
712 TRAPS) {
713 if (!Reflection::verify_field_access(ref_klass(),
714 resolved_klass(),
715 sel_klass(),
716 fd.access_flags(),
717 true)) {
718 ResourceMark rm(THREAD);
719 Exceptions::fthrow(
720 THREAD_AND_LOCATION,
721 vmSymbols::java_lang_IllegalAccessError(),
722 "tried to access field %s.%s from class %s",
723 sel_klass->external_name(),
724 fd.name()->as_C_string(),
725 ref_klass->external_name()
726 );
727 return;
728 }
729 }
731 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
732 // Load these early in case the resolve of the containing klass fails
733 Symbol* field = pool->name_ref_at(index);
734 Symbol* sig = pool->signature_ref_at(index);
736 // resolve specified klass
737 KlassHandle resolved_klass;
738 resolve_klass(resolved_klass, pool, index, CHECK);
740 KlassHandle current_klass(THREAD, pool->pool_holder());
741 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
742 }
744 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
745 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
746 TRAPS) {
747 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
748 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
749 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
751 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
752 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
754 // Check if there's a resolved klass containing the field
755 if (resolved_klass.is_null()) {
756 ResourceMark rm(THREAD);
757 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
758 }
760 // Resolve instance field
761 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
762 // check if field exists; i.e., if a klass containing the field def has been selected
763 if (sel_klass.is_null()) {
764 ResourceMark rm(THREAD);
765 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
766 }
768 if (!check_access)
769 // Access checking may be turned off when calling from within the VM.
770 return;
772 // check access
773 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
775 // check for errors
776 if (is_static != fd.is_static()) {
777 ResourceMark rm(THREAD);
778 char msg[200];
779 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
780 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
781 }
783 // Final fields can only be accessed from its own class.
784 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
785 THROW(vmSymbols::java_lang_IllegalAccessError());
786 }
788 // initialize resolved_klass if necessary
789 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
790 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
791 //
792 // note 2: we don't want to force initialization if we are just checking
793 // if the field access is legal; e.g., during compilation
794 if (is_static && initialize_class) {
795 sel_klass->initialize(CHECK);
796 }
798 if (sel_klass() != current_klass()) {
799 HandleMark hm(THREAD);
800 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
801 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
802 {
803 ResourceMark rm(THREAD);
804 Symbol* failed_type_symbol =
805 SystemDictionary::check_signature_loaders(sig,
806 ref_loader, sel_loader,
807 false,
808 CHECK);
809 if (failed_type_symbol != NULL) {
810 const char* msg = "loader constraint violation: when resolving field"
811 " \"%s\" the class loader (instance of %s) of the referring class, "
812 "%s, and the class loader (instance of %s) for the field's resolved "
813 "type, %s, have different Class objects for that type";
814 char* field_name = field->as_C_string();
815 const char* loader1 = SystemDictionary::loader_name(ref_loader());
816 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
817 const char* loader2 = SystemDictionary::loader_name(sel_loader());
818 char* failed_type_name = failed_type_symbol->as_C_string();
819 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
820 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
821 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
822 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
823 failed_type_name);
824 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
825 }
826 }
827 }
829 // return information. note that the klass is set to the actual klass containing the
830 // field, otherwise access of static fields in superclasses will not work.
831 }
834 //------------------------------------------------------------------------------------------------------------------------
835 // Invoke resolution
836 //
837 // Naming conventions:
838 //
839 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
840 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
841 // resolved_klass the specified klass (i.e., specified via constant pool index)
842 // recv_klass the receiver klass
845 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
846 Symbol* method_signature, KlassHandle current_klass,
847 bool check_access, bool initialize_class, TRAPS) {
848 methodHandle resolved_method;
849 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
850 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
852 // Initialize klass (this should only happen if everything is ok)
853 if (initialize_class && resolved_klass->should_be_initialized()) {
854 resolved_klass->initialize(CHECK);
855 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
856 }
858 // setup result
859 result.set_static(resolved_klass, resolved_method, CHECK);
860 }
862 // throws linktime exceptions
863 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
864 Symbol* method_name, Symbol* method_signature,
865 KlassHandle current_klass, bool check_access, TRAPS) {
867 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
868 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
870 // check if static
871 if (!resolved_method->is_static()) {
872 ResourceMark rm(THREAD);
873 char buf[200];
874 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
875 resolved_method->name(),
876 resolved_method->signature()));
877 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
878 }
879 }
882 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
883 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
884 methodHandle resolved_method;
885 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
886 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
887 }
889 // throws linktime exceptions
890 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
891 Symbol* method_name, Symbol* method_signature,
892 KlassHandle current_klass, bool check_access, TRAPS) {
894 // Invokespecial is called for multiple special reasons:
895 // <init>
896 // local private method invocation, for classes and interfaces
897 // superclass.method, which can also resolve to a default method
898 // and the selected method is recalculated relative to the direct superclass
899 // superinterface.method, which explicitly does not check shadowing
901 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
903 // check if method name is <init>, that it is found in same klass as static type
904 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
905 resolved_method->method_holder() != resolved_klass()) {
906 ResourceMark rm(THREAD);
907 Exceptions::fthrow(
908 THREAD_AND_LOCATION,
909 vmSymbols::java_lang_NoSuchMethodError(),
910 "%s: method %s%s not found",
911 resolved_klass->external_name(),
912 resolved_method->name()->as_C_string(),
913 resolved_method->signature()->as_C_string()
914 );
915 return;
916 }
918 // check if not static
919 if (resolved_method->is_static()) {
920 ResourceMark rm(THREAD);
921 char buf[200];
922 jio_snprintf(buf, sizeof(buf),
923 "Expecting non-static method %s",
924 Method::name_and_sig_as_C_string(resolved_klass(),
925 resolved_method->name(),
926 resolved_method->signature()));
927 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
928 }
930 if (TraceItables && Verbose) {
931 ResourceMark rm(THREAD);
932 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
933 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
934 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
935 Method::name_and_sig_as_C_string(resolved_klass(),
936 resolved_method->name(),
937 resolved_method->signature()),
938 resolved_method->method_holder()->internal_name()
939 );
940 resolved_method->access_flags().print_on(tty);
941 if (resolved_method->is_default_method()) {
942 tty->print("default ");
943 }
944 if (resolved_method->is_overpass()) {
945 tty->print("overpass");
946 }
947 tty->cr();
948 }
949 }
951 // throws runtime exceptions
952 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
953 KlassHandle current_klass, bool check_access, TRAPS) {
955 // resolved method is selected method unless we have an old-style lookup
956 // for a superclass method
957 // Invokespecial for a superinterface, resolved method is selected method,
958 // no checks for shadowing
959 methodHandle sel_method(THREAD, resolved_method());
961 // check if this is an old-style super call and do a new lookup if so
962 { KlassHandle method_klass = KlassHandle(THREAD,
963 resolved_method->method_holder());
965 if (check_access &&
966 // a) check if ACC_SUPER flag is set for the current class
967 (current_klass->is_super() || !AllowNonVirtualCalls) &&
968 // b) check if the class of the resolved_klass is a superclass
969 // (not supertype in order to exclude interface classes) of the current class.
970 // This check is not performed for super.invoke for interface methods
971 // in super interfaces.
972 current_klass->is_subclass_of(resolved_klass()) &&
973 current_klass() != resolved_klass() &&
974 // c) check if the method is not <init>
975 resolved_method->name() != vmSymbols::object_initializer_name()) {
976 // Lookup super method
977 KlassHandle super_klass(THREAD, current_klass->super());
978 lookup_instance_method_in_klasses(sel_method, super_klass,
979 resolved_method->name(),
980 resolved_method->signature(), CHECK);
981 // check if found
982 if (sel_method.is_null()) {
983 ResourceMark rm(THREAD);
984 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
985 Method::name_and_sig_as_C_string(resolved_klass(),
986 resolved_method->name(),
987 resolved_method->signature()));
988 }
989 }
990 }
992 // check if not static
993 if (sel_method->is_static()) {
994 ResourceMark rm(THREAD);
995 char buf[200];
996 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
997 resolved_method->name(),
998 resolved_method->signature()));
999 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1000 }
1002 // check if abstract
1003 if (sel_method->is_abstract()) {
1004 ResourceMark rm(THREAD);
1005 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1006 Method::name_and_sig_as_C_string(resolved_klass(),
1007 sel_method->name(),
1008 sel_method->signature()));
1009 }
1011 if (TraceItables && Verbose) {
1012 ResourceMark rm(THREAD);
1013 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1014 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1015 Method::name_and_sig_as_C_string(resolved_klass(),
1016 sel_method->name(),
1017 sel_method->signature()),
1018 sel_method->method_holder()->internal_name()
1019 );
1020 sel_method->access_flags().print_on(tty);
1021 if (sel_method->is_default_method()) {
1022 tty->print("default ");
1023 }
1024 if (sel_method->is_overpass()) {
1025 tty->print("overpass");
1026 }
1027 tty->cr();
1028 }
1030 // setup result
1031 result.set_static(resolved_klass, sel_method, CHECK);
1032 }
1034 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
1035 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1036 bool check_access, bool check_null_and_abstract, TRAPS) {
1037 methodHandle resolved_method;
1038 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1039 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
1040 }
1042 // throws linktime exceptions
1043 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
1044 Symbol* method_name, Symbol* method_signature,
1045 KlassHandle current_klass, bool check_access, TRAPS) {
1046 // normal method resolution
1047 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1049 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1050 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1052 // check if private interface method
1053 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1054 ResourceMark rm(THREAD);
1055 char buf[200];
1056 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1057 Method::name_and_sig_as_C_string(resolved_klass(),
1058 resolved_method->name(),
1059 resolved_method->signature()),
1060 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
1061 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1062 }
1064 // check if not static
1065 if (resolved_method->is_static()) {
1066 ResourceMark rm(THREAD);
1067 char buf[200];
1068 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1069 resolved_method->name(),
1070 resolved_method->signature()));
1071 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1072 }
1074 if (PrintVtables && Verbose) {
1075 ResourceMark rm(THREAD);
1076 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
1077 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
1078 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1079 Method::name_and_sig_as_C_string(resolved_klass(),
1080 resolved_method->name(),
1081 resolved_method->signature()),
1082 resolved_method->method_holder()->internal_name()
1083 );
1084 resolved_method->access_flags().print_on(tty);
1085 if (resolved_method->is_default_method()) {
1086 tty->print("default ");
1087 }
1088 if (resolved_method->is_overpass()) {
1089 tty->print("overpass");
1090 }
1091 tty->cr();
1092 }
1093 }
1095 // throws runtime exceptions
1096 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1097 methodHandle resolved_method,
1098 KlassHandle resolved_klass,
1099 Handle recv,
1100 KlassHandle recv_klass,
1101 bool check_null_and_abstract,
1102 TRAPS) {
1104 // setup default return values
1105 int vtable_index = Method::invalid_vtable_index;
1106 methodHandle selected_method;
1108 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
1110 // runtime method resolution
1111 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1112 THROW(vmSymbols::java_lang_NullPointerException());
1113 }
1115 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1116 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1117 // a missing receiver might result in a bogus lookup.
1118 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1120 // do lookup based on receiver klass using the vtable index
1121 if (resolved_method->method_holder()->is_interface()) { // miranda method
1122 vtable_index = vtable_index_of_interface_method(resolved_klass,
1123 resolved_method);
1124 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1126 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
1127 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1128 } else {
1129 // at this point we are sure that resolved_method is virtual and not
1130 // a miranda method; therefore, it must have a valid vtable index.
1131 assert(!resolved_method->has_itable_index(), "");
1132 vtable_index = resolved_method->vtable_index();
1133 // We could get a negative vtable_index for final methods,
1134 // because as an optimization they are they are never put in the vtable,
1135 // unless they override an existing method.
1136 // If we do get a negative, it means the resolved method is the the selected
1137 // method, and it can never be changed by an override.
1138 if (vtable_index == Method::nonvirtual_vtable_index) {
1139 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1140 selected_method = resolved_method;
1141 } else {
1142 // recv_klass might be an arrayKlassOop but all vtables start at
1143 // the same place. The cast is to avoid virtual call and assertion.
1144 InstanceKlass* inst = (InstanceKlass*)recv_klass();
1145 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1146 }
1147 }
1149 // check if method exists
1150 if (selected_method.is_null()) {
1151 ResourceMark rm(THREAD);
1152 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1153 Method::name_and_sig_as_C_string(resolved_klass(),
1154 resolved_method->name(),
1155 resolved_method->signature()));
1156 }
1158 // check if abstract
1159 if (check_null_and_abstract && selected_method->is_abstract()) {
1160 ResourceMark rm(THREAD);
1161 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1162 Method::name_and_sig_as_C_string(resolved_klass(),
1163 selected_method->name(),
1164 selected_method->signature()));
1165 }
1167 if (PrintVtables && Verbose) {
1168 ResourceMark rm(THREAD);
1169 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ",
1170 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1171 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1172 Method::name_and_sig_as_C_string(resolved_klass(),
1173 resolved_method->name(),
1174 resolved_method->signature()),
1175 selected_method->method_holder()->internal_name(),
1176 vtable_index
1177 );
1178 selected_method->access_flags().print_on(tty);
1179 if (selected_method->is_default_method()) {
1180 tty->print("default ");
1181 }
1182 if (selected_method->is_overpass()) {
1183 tty->print("overpass");
1184 }
1185 tty->cr();
1186 }
1187 // setup result
1188 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1189 }
1191 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
1192 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1193 bool check_access, bool check_null_and_abstract, TRAPS) {
1194 methodHandle resolved_method;
1195 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1196 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
1197 }
1199 // throws linktime exceptions
1200 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
1201 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
1202 // normal interface method resolution
1203 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1205 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1206 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1207 }
1209 // throws runtime exceptions
1210 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1211 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
1212 // check if receiver exists
1213 if (check_null_and_abstract && recv.is_null()) {
1214 THROW(vmSymbols::java_lang_NullPointerException());
1215 }
1217 // check if private interface method
1218 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1219 ResourceMark rm(THREAD);
1220 char buf[200];
1221 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
1222 Method::name_and_sig_as_C_string(resolved_klass(),
1223 resolved_method->name(),
1224 resolved_method->signature()));
1225 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1226 }
1228 // check if receiver klass implements the resolved interface
1229 if (!recv_klass->is_subtype_of(resolved_klass())) {
1230 ResourceMark rm(THREAD);
1231 char buf[200];
1232 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1233 recv_klass()->external_name(),
1234 resolved_klass()->external_name());
1235 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1236 }
1237 // do lookup based on receiver klass
1238 methodHandle sel_method;
1239 lookup_instance_method_in_klasses(sel_method, recv_klass,
1240 resolved_method->name(),
1241 resolved_method->signature(), CHECK);
1242 if (sel_method.is_null() && !check_null_and_abstract) {
1243 // In theory this is a harmless placeholder value, but
1244 // in practice leaving in null affects the nsk default method tests.
1245 // This needs further study.
1246 sel_method = resolved_method;
1247 }
1248 // check if method exists
1249 if (sel_method.is_null()) {
1250 ResourceMark rm(THREAD);
1251 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1252 Method::name_and_sig_as_C_string(recv_klass(),
1253 resolved_method->name(),
1254 resolved_method->signature()));
1255 }
1256 // check access
1257 // Throw Illegal Access Error if sel_method is not public.
1258 if (!sel_method->is_public()) {
1259 ResourceMark rm(THREAD);
1260 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1261 Method::name_and_sig_as_C_string(recv_klass(),
1262 sel_method->name(),
1263 sel_method->signature()));
1264 }
1265 // check if abstract
1266 if (check_null_and_abstract && sel_method->is_abstract()) {
1267 ResourceMark rm(THREAD);
1268 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1269 Method::name_and_sig_as_C_string(recv_klass(),
1270 sel_method->name(),
1271 sel_method->signature()));
1272 }
1274 if (TraceItables && Verbose) {
1275 ResourceMark rm(THREAD);
1276 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1277 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1278 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1279 Method::name_and_sig_as_C_string(resolved_klass(),
1280 resolved_method->name(),
1281 resolved_method->signature()),
1282 sel_method->method_holder()->internal_name()
1283 );
1284 sel_method->access_flags().print_on(tty);
1285 if (sel_method->is_default_method()) {
1286 tty->print("default ");
1287 }
1288 if (sel_method->is_overpass()) {
1289 tty->print("overpass");
1290 }
1291 tty->cr();
1292 }
1293 // setup result
1294 if (!resolved_method->has_itable_index()) {
1295 int vtable_index = resolved_method->vtable_index();
1296 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1297 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1298 } else {
1299 int itable_index = resolved_method()->itable_index();
1300 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1301 }
1302 }
1305 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1306 KlassHandle resolved_klass,
1307 Symbol* method_name,
1308 Symbol* method_signature,
1309 KlassHandle current_klass,
1310 bool check_access) {
1311 EXCEPTION_MARK;
1312 methodHandle method_result;
1313 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1314 if (HAS_PENDING_EXCEPTION) {
1315 CLEAR_PENDING_EXCEPTION;
1316 return methodHandle();
1317 } else {
1318 return method_result;
1319 }
1320 }
1322 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1323 KlassHandle resolved_klass,
1324 Symbol* method_name,
1325 Symbol* method_signature,
1326 KlassHandle current_klass,
1327 bool check_access) {
1328 EXCEPTION_MARK;
1329 methodHandle method_result;
1330 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1331 if (HAS_PENDING_EXCEPTION) {
1332 CLEAR_PENDING_EXCEPTION;
1333 return methodHandle();
1334 } else {
1335 return method_result;
1336 }
1337 }
1339 methodHandle LinkResolver::resolve_virtual_call_or_null(
1340 KlassHandle receiver_klass,
1341 KlassHandle resolved_klass,
1342 Symbol* name,
1343 Symbol* signature,
1344 KlassHandle current_klass) {
1345 EXCEPTION_MARK;
1346 CallInfo info;
1347 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1348 if (HAS_PENDING_EXCEPTION) {
1349 CLEAR_PENDING_EXCEPTION;
1350 return methodHandle();
1351 }
1352 return info.selected_method();
1353 }
1355 methodHandle LinkResolver::resolve_interface_call_or_null(
1356 KlassHandle receiver_klass,
1357 KlassHandle resolved_klass,
1358 Symbol* name,
1359 Symbol* signature,
1360 KlassHandle current_klass) {
1361 EXCEPTION_MARK;
1362 CallInfo info;
1363 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1364 if (HAS_PENDING_EXCEPTION) {
1365 CLEAR_PENDING_EXCEPTION;
1366 return methodHandle();
1367 }
1368 return info.selected_method();
1369 }
1371 int LinkResolver::resolve_virtual_vtable_index(
1372 KlassHandle receiver_klass,
1373 KlassHandle resolved_klass,
1374 Symbol* name,
1375 Symbol* signature,
1376 KlassHandle current_klass) {
1377 EXCEPTION_MARK;
1378 CallInfo info;
1379 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1380 if (HAS_PENDING_EXCEPTION) {
1381 CLEAR_PENDING_EXCEPTION;
1382 return Method::invalid_vtable_index;
1383 }
1384 return info.vtable_index();
1385 }
1387 methodHandle LinkResolver::resolve_static_call_or_null(
1388 KlassHandle resolved_klass,
1389 Symbol* name,
1390 Symbol* signature,
1391 KlassHandle current_klass) {
1392 EXCEPTION_MARK;
1393 CallInfo info;
1394 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1395 if (HAS_PENDING_EXCEPTION) {
1396 CLEAR_PENDING_EXCEPTION;
1397 return methodHandle();
1398 }
1399 return info.selected_method();
1400 }
1402 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1403 KlassHandle current_klass) {
1404 EXCEPTION_MARK;
1405 CallInfo info;
1406 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1407 if (HAS_PENDING_EXCEPTION) {
1408 CLEAR_PENDING_EXCEPTION;
1409 return methodHandle();
1410 }
1411 return info.selected_method();
1412 }
1416 //------------------------------------------------------------------------------------------------------------------------
1417 // ConstantPool entries
1419 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1420 switch (byte) {
1421 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1422 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1423 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1424 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1425 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1426 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1427 }
1428 return;
1429 }
1431 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1432 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1433 // resolve klass
1434 resolve_klass(resolved_klass, pool, index, CHECK);
1436 // Get name, signature, and static klass
1437 method_name = pool->name_ref_at(index);
1438 method_signature = pool->signature_ref_at(index);
1439 current_klass = KlassHandle(THREAD, pool->pool_holder());
1440 }
1443 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1444 KlassHandle resolved_klass;
1445 Symbol* method_name = NULL;
1446 Symbol* method_signature = NULL;
1447 KlassHandle current_klass;
1448 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1449 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1450 }
1453 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1454 KlassHandle resolved_klass;
1455 Symbol* method_name = NULL;
1456 Symbol* method_signature = NULL;
1457 KlassHandle current_klass;
1458 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1459 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1460 }
1463 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1464 constantPoolHandle pool, int index,
1465 TRAPS) {
1467 KlassHandle resolved_klass;
1468 Symbol* method_name = NULL;
1469 Symbol* method_signature = NULL;
1470 KlassHandle current_klass;
1471 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1472 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1473 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1474 }
1477 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1478 KlassHandle resolved_klass;
1479 Symbol* method_name = NULL;
1480 Symbol* method_signature = NULL;
1481 KlassHandle current_klass;
1482 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1483 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1484 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1485 }
1488 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1489 assert(EnableInvokeDynamic, "");
1490 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1491 KlassHandle resolved_klass;
1492 Symbol* method_name = NULL;
1493 Symbol* method_signature = NULL;
1494 KlassHandle current_klass;
1495 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1496 if (TraceMethodHandles) {
1497 ResourceMark rm(THREAD);
1498 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1499 }
1500 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1501 }
1503 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1504 Symbol* method_name, Symbol* method_signature,
1505 KlassHandle current_klass,
1506 TRAPS) {
1507 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1508 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1509 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1510 methodHandle resolved_method;
1511 Handle resolved_appendix;
1512 Handle resolved_method_type;
1513 lookup_polymorphic_method(resolved_method, resolved_klass,
1514 method_name, method_signature,
1515 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1516 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1517 }
1520 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1521 assert(EnableInvokeDynamic, "");
1523 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1524 Symbol* method_name = pool->name_ref_at(index);
1525 Symbol* method_signature = pool->signature_ref_at(index);
1526 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1528 // Resolve the bootstrap specifier (BSM + optional arguments).
1529 Handle bootstrap_specifier;
1530 // Check if CallSite has been bound already:
1531 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1532 if (cpce->is_f1_null()) {
1533 int pool_index = cpce->constant_pool_index();
1534 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1535 assert(bsm_info != NULL, "");
1536 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1537 bootstrap_specifier = Handle(THREAD, bsm_info);
1538 }
1539 if (!cpce->is_f1_null()) {
1540 methodHandle method( THREAD, cpce->f1_as_method());
1541 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1542 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1543 result.set_handle(method, appendix, method_type, CHECK);
1544 return;
1545 }
1547 if (TraceMethodHandles) {
1548 ResourceMark rm(THREAD);
1549 tty->print_cr("resolve_invokedynamic #%d %s %s",
1550 ConstantPool::decode_invokedynamic_index(index),
1551 method_name->as_C_string(), method_signature->as_C_string());
1552 tty->print(" BSM info: "); bootstrap_specifier->print();
1553 }
1555 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1556 }
1558 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1559 Handle bootstrap_specifier,
1560 Symbol* method_name, Symbol* method_signature,
1561 KlassHandle current_klass,
1562 TRAPS) {
1563 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1564 // The appendix argument is likely to be a freshly-created CallSite.
1565 Handle resolved_appendix;
1566 Handle resolved_method_type;
1567 methodHandle resolved_method =
1568 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1569 bootstrap_specifier,
1570 method_name, method_signature,
1571 &resolved_appendix,
1572 &resolved_method_type,
1573 THREAD);
1574 if (HAS_PENDING_EXCEPTION) {
1575 if (TraceMethodHandles) {
1576 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION);
1577 PENDING_EXCEPTION->print();
1578 }
1579 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1580 // throw these guys, since they are already wrapped
1581 return;
1582 }
1583 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1584 // intercept only LinkageErrors which might have failed to wrap
1585 return;
1586 }
1587 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1588 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1589 CLEAR_PENDING_EXCEPTION;
1590 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1591 }
1592 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1593 }
1595 //------------------------------------------------------------------------------------------------------------------------
1596 #ifndef PRODUCT
1598 void CallInfo::print() {
1599 ResourceMark rm;
1600 const char* kindstr = "unknown";
1601 switch (_call_kind) {
1602 case direct_call: kindstr = "direct"; break;
1603 case vtable_call: kindstr = "vtable"; break;
1604 case itable_call: kindstr = "itable"; break;
1605 }
1606 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
1607 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
1608 }
1610 #endif
