Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/interpreter/linkResolver.cpp@cd3089a56438
src/share/vm/interpreter/linkResolver.cpp
Wed, 27 Mar 2013 14:10:59 -0400
- author
- acorn
- date
- Wed, 27 Mar 2013 14:10:59 -0400
- changeset 4840
- cd3089a56438
- parent 4706
- 11d5942ef9c7
- child 4910
- d79859ff6535
- permissions
- -rw-r--r--
8009731: Confusing error message for loader constraint violation
Summary: Fix text, overwritten type and holder for resolved method
Reviewed-by: coleenp, dcubed, minqi, dholmes
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"
49 //------------------------------------------------------------------------------------------------------------------------
50 // Implementation of FieldAccessInfo
52 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset,
53 BasicType field_type, AccessFlags access_flags) {
54 _klass = klass;
55 _name = name;
56 _field_index = field_index;
57 _field_offset = field_offset;
58 _field_type = field_type;
59 _access_flags = access_flags;
60 }
63 //------------------------------------------------------------------------------------------------------------------------
64 // Implementation of CallInfo
67 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
68 int vtable_index = Method::nonvirtual_vtable_index;
69 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
70 }
73 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) {
74 // This is only called for interface methods. If the resolved_method
75 // comes from java/lang/Object, it can be the subject of a virtual call, so
76 // we should pick the vtable index from the resolved method.
77 // Other than that case, there is no valid vtable index to specify.
78 int vtable_index = Method::invalid_vtable_index;
79 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) {
80 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");
81 vtable_index = resolved_method->vtable_index();
82 }
83 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
84 }
86 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
87 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
88 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
89 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
90 }
92 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) {
93 if (resolved_method.is_null()) {
94 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
95 }
96 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
97 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
98 resolved_method->is_compiled_lambda_form(),
99 "linkMethod must return one of these");
100 int vtable_index = Method::nonvirtual_vtable_index;
101 assert(resolved_method->vtable_index() == vtable_index, "");
102 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
103 _resolved_appendix = resolved_appendix;
104 _resolved_method_type = resolved_method_type;
105 }
107 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
108 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
109 _resolved_klass = resolved_klass;
110 _selected_klass = selected_klass;
111 _resolved_method = resolved_method;
112 _selected_method = selected_method;
113 _vtable_index = vtable_index;
114 _resolved_appendix = Handle();
115 if (CompilationPolicy::must_be_compiled(selected_method)) {
116 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
118 // Note: with several active threads, the must_be_compiled may be true
119 // while can_be_compiled is false; remove assert
120 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
121 if (THREAD->is_Compiler_thread()) {
122 // don't force compilation, resolve was on behalf of compiler
123 return;
124 }
125 if (selected_method->method_holder()->is_not_initialized()) {
126 // 'is_not_initialized' means not only '!is_initialized', but also that
127 // initialization has not been started yet ('!being_initialized')
128 // Do not force compilation of methods in uninitialized classes.
129 // Note that doing this would throw an assert later,
130 // in CompileBroker::compile_method.
131 // We sometimes use the link resolver to do reflective lookups
132 // even before classes are initialized.
133 return;
134 }
135 CompileBroker::compile_method(selected_method, InvocationEntryBci,
136 CompilationPolicy::policy()->initial_compile_level(),
137 methodHandle(), 0, "must_be_compiled", CHECK);
138 }
139 }
142 //------------------------------------------------------------------------------------------------------------------------
143 // Klass resolution
145 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
146 if (!Reflection::verify_class_access(ref_klass(),
147 sel_klass(),
148 true)) {
149 ResourceMark rm(THREAD);
150 Exceptions::fthrow(
151 THREAD_AND_LOCATION,
152 vmSymbols::java_lang_IllegalAccessError(),
153 "tried to access class %s from class %s",
154 sel_klass->external_name(),
155 ref_klass->external_name()
156 );
157 return;
158 }
159 }
161 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
162 Klass* result_oop = pool->klass_ref_at(index, CHECK);
163 result = KlassHandle(THREAD, result_oop);
164 }
166 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
167 Klass* result_oop =
168 ConstantPool::klass_ref_at_if_loaded_check(pool, index, CHECK);
169 result = KlassHandle(THREAD, result_oop);
170 }
173 //------------------------------------------------------------------------------------------------------------------------
174 // Method resolution
175 //
176 // According to JVM spec. $5.4.3c & $5.4.3d
178 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
179 Method* result_oop = klass->uncached_lookup_method(name, signature);
180 if (EnableInvokeDynamic && result_oop != NULL) {
181 vmIntrinsics::ID iid = result_oop->intrinsic_id();
182 if (MethodHandles::is_signature_polymorphic(iid)) {
183 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
184 return;
185 }
186 }
187 result = methodHandle(THREAD, result_oop);
188 }
190 // returns first instance method
191 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
192 Method* result_oop = klass->uncached_lookup_method(name, signature);
193 result = methodHandle(THREAD, result_oop);
194 while (!result.is_null() && result->is_static()) {
195 klass = KlassHandle(THREAD, result->method_holder()->super());
196 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));
197 }
198 }
201 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
202 ResourceMark rm(THREAD);
203 klassVtable *vt = InstanceKlass::cast(klass())->vtable();
204 return vt->index_of_miranda(name, signature);
205 }
207 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
208 InstanceKlass *ik = InstanceKlass::cast(klass());
209 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));
210 }
212 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
213 KlassHandle klass, Symbol* name, Symbol* full_signature,
214 KlassHandle current_klass,
215 Handle *appendix_result_or_null,
216 Handle *method_type_result,
217 TRAPS) {
218 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
219 if (TraceMethodHandles) {
220 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
221 vmIntrinsics::name_at(iid), klass->external_name(),
222 name->as_C_string(), full_signature->as_C_string());
223 }
224 if (EnableInvokeDynamic &&
225 klass() == SystemDictionary::MethodHandle_klass() &&
226 iid != vmIntrinsics::_none) {
227 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
228 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
229 // Do not erase last argument type (MemberName) if it is a static linkTo method.
230 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
231 TempNewSymbol basic_signature =
232 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
233 if (TraceMethodHandles) {
234 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
235 name->as_C_string(),
236 full_signature->as_C_string(),
237 basic_signature->as_C_string());
238 }
239 result = SystemDictionary::find_method_handle_intrinsic(iid,
240 basic_signature,
241 CHECK);
242 if (result.not_null()) {
243 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
244 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
245 assert(basic_signature == result->signature(), "predict the result signature");
246 if (TraceMethodHandles) {
247 tty->print("lookup_polymorphic_method => intrinsic ");
248 result->print_on(tty);
249 }
250 return;
251 }
252 } else if (iid == vmIntrinsics::_invokeGeneric
253 && !THREAD->is_Compiler_thread()
254 && appendix_result_or_null != NULL) {
255 // This is a method with type-checking semantics.
256 // We will ask Java code to spin an adapter method for it.
257 if (!MethodHandles::enabled()) {
258 // Make sure the Java part of the runtime has been booted up.
259 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
260 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
261 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
262 Handle(),
263 Handle(),
264 true,
265 CHECK);
266 }
267 }
269 Handle appendix;
270 Handle method_type;
271 result = SystemDictionary::find_method_handle_invoker(name,
272 full_signature,
273 current_klass,
274 &appendix,
275 &method_type,
276 CHECK);
277 if (TraceMethodHandles) {
278 tty->print("lookup_polymorphic_method => (via Java) ");
279 result->print_on(tty);
280 tty->print(" lookup_polymorphic_method => appendix = ");
281 if (appendix.is_null()) tty->print_cr("(none)");
282 else appendix->print_on(tty);
283 }
284 if (result.not_null()) {
285 #ifdef ASSERT
286 TempNewSymbol basic_signature =
287 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
288 int actual_size_of_params = result->size_of_parameters();
289 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
290 // +1 for MethodHandle.this, +1 for trailing MethodType
291 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
292 if (appendix.not_null()) expected_size_of_params += 1;
293 if (actual_size_of_params != expected_size_of_params) {
294 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
295 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
296 result->print();
297 }
298 assert(actual_size_of_params == expected_size_of_params,
299 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
300 #endif //ASSERT
302 assert(appendix_result_or_null != NULL, "");
303 (*appendix_result_or_null) = appendix;
304 (*method_type_result) = method_type;
305 return;
306 }
307 }
308 }
309 }
311 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
312 KlassHandle resolved_klass,
313 KlassHandle sel_klass,
314 methodHandle sel_method,
315 TRAPS) {
317 AccessFlags flags = sel_method->access_flags();
319 // Special case: arrays always override "clone". JVMS 2.15.
320 // If the resolved klass is an array class, and the declaring class
321 // is java.lang.Object and the method is "clone", set the flags
322 // to public.
323 //
324 // We'll check for the method name first, as that's most likely
325 // to be false (so we'll short-circuit out of these tests).
326 if (sel_method->name() == vmSymbols::clone_name() &&
327 sel_klass() == SystemDictionary::Object_klass() &&
328 resolved_klass->oop_is_array()) {
329 // We need to change "protected" to "public".
330 assert(flags.is_protected(), "clone not protected?");
331 jint new_flags = flags.as_int();
332 new_flags = new_flags & (~JVM_ACC_PROTECTED);
333 new_flags = new_flags | JVM_ACC_PUBLIC;
334 flags.set_flags(new_flags);
335 }
336 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
338 if (!Reflection::verify_field_access(ref_klass(),
339 resolved_klass(),
340 sel_klass(),
341 flags,
342 true)) {
343 ResourceMark rm(THREAD);
344 Exceptions::fthrow(
345 THREAD_AND_LOCATION,
346 vmSymbols::java_lang_IllegalAccessError(),
347 "tried to access method %s.%s%s from class %s",
348 sel_klass->external_name(),
349 sel_method->name()->as_C_string(),
350 sel_method->signature()->as_C_string(),
351 ref_klass->external_name()
352 );
353 return;
354 }
355 }
357 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
358 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
360 // resolve klass
361 if (code == Bytecodes::_invokedynamic) {
362 resolved_klass = SystemDictionary::MethodHandle_klass();
363 Symbol* method_name = vmSymbols::invoke_name();
364 Symbol* method_signature = pool->signature_ref_at(index);
365 KlassHandle current_klass(THREAD, pool->pool_holder());
366 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
367 return;
368 }
370 resolve_klass(resolved_klass, pool, index, CHECK);
372 Symbol* method_name = pool->name_ref_at(index);
373 Symbol* method_signature = pool->signature_ref_at(index);
374 KlassHandle current_klass(THREAD, pool->pool_holder());
376 if (pool->has_preresolution()
377 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
378 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
379 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
380 if (result_oop != NULL) {
381 resolved_method = methodHandle(THREAD, result_oop);
382 return;
383 }
384 }
386 if (code == Bytecodes::_invokeinterface) {
387 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
388 } else {
389 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
390 }
391 }
393 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
394 Symbol* method_name, Symbol* method_signature,
395 KlassHandle current_klass, bool check_access, TRAPS) {
397 Handle nested_exception;
399 // 1. lookup method in resolved klass and its super klasses
400 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
402 if (resolved_method.is_null()) { // not found in the class hierarchy
403 // 2. lookup method in all the interfaces implemented by the resolved klass
404 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
406 if (resolved_method.is_null()) {
407 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
408 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
409 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
410 if (HAS_PENDING_EXCEPTION) {
411 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
412 CLEAR_PENDING_EXCEPTION;
413 }
414 }
416 if (resolved_method.is_null()) {
417 // 3. method lookup failed
418 ResourceMark rm(THREAD);
419 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
420 Method::name_and_sig_as_C_string(resolved_klass(),
421 method_name,
422 method_signature),
423 nested_exception);
424 }
425 }
427 // 4. check if klass is not interface
428 if (resolved_klass->is_interface() && resolved_method->is_abstract()) {
429 ResourceMark rm(THREAD);
430 char buf[200];
431 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
432 resolved_klass()->external_name());
433 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
434 }
436 // 5. check if method is concrete
437 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
438 ResourceMark rm(THREAD);
439 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
440 Method::name_and_sig_as_C_string(resolved_klass(),
441 method_name,
442 method_signature));
443 }
445 // 6. access checks, access checking may be turned off when calling from within the VM.
446 if (check_access) {
447 assert(current_klass.not_null() , "current_klass should not be null");
449 // check if method can be accessed by the referring class
450 check_method_accessability(current_klass,
451 resolved_klass,
452 KlassHandle(THREAD, resolved_method->method_holder()),
453 resolved_method,
454 CHECK);
456 // check loader constraints
457 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
458 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
459 {
460 ResourceMark rm(THREAD);
461 Symbol* failed_type_symbol =
462 SystemDictionary::check_signature_loaders(method_signature, loader,
463 class_loader, true, CHECK);
464 if (failed_type_symbol != NULL) {
465 const char* msg = "loader constraint violation: when resolving method"
466 " \"%s\" the class loader (instance of %s) of the current class, %s,"
467 " and the class loader (instance of %s) for the method's defining class, %s, have"
468 " different Class objects for the type %s used in the signature";
469 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
470 const char* loader1 = SystemDictionary::loader_name(loader());
471 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
472 const char* loader2 = SystemDictionary::loader_name(class_loader());
473 char* target = InstanceKlass::cast(resolved_method->method_holder())
474 ->name()->as_C_string();
475 char* failed_type_name = failed_type_symbol->as_C_string();
476 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
477 strlen(current) + strlen(loader2) + strlen(target) +
478 strlen(failed_type_name) + 1;
479 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
480 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
481 target, failed_type_name);
482 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
483 }
484 }
485 }
486 }
488 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
489 KlassHandle resolved_klass,
490 Symbol* method_name,
491 Symbol* method_signature,
492 KlassHandle current_klass,
493 bool check_access, TRAPS) {
495 // check if klass is interface
496 if (!resolved_klass->is_interface()) {
497 ResourceMark rm(THREAD);
498 char buf[200];
499 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
500 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
501 }
503 // lookup method in this interface or its super, java.lang.Object
504 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
506 if (resolved_method.is_null()) {
507 // lookup method in all the super-interfaces
508 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
509 if (resolved_method.is_null()) {
510 // no method found
511 ResourceMark rm(THREAD);
512 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
513 Method::name_and_sig_as_C_string(resolved_klass(),
514 method_name,
515 method_signature));
516 }
517 }
519 if (check_access) {
520 HandleMark hm(THREAD);
521 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
522 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
523 {
524 ResourceMark rm(THREAD);
525 Symbol* failed_type_symbol =
526 SystemDictionary::check_signature_loaders(method_signature, loader,
527 class_loader, true, CHECK);
528 if (failed_type_symbol != NULL) {
529 const char* msg = "loader constraint violation: when resolving "
530 "interface method \"%s\" the class loader (instance of %s) of the "
531 "current class, %s, and the class loader (instance of %s) for "
532 "the method's defining class, %s, have different Class objects for the type %s "
533 "used in the signature";
534 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
535 const char* loader1 = SystemDictionary::loader_name(loader());
536 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
537 const char* loader2 = SystemDictionary::loader_name(class_loader());
538 char* target = InstanceKlass::cast(resolved_method->method_holder())
539 ->name()->as_C_string();
540 char* failed_type_name = failed_type_symbol->as_C_string();
541 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
542 strlen(current) + strlen(loader2) + strlen(target) +
543 strlen(failed_type_name) + 1;
544 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
545 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
546 target, failed_type_name);
547 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
548 }
549 }
550 }
551 }
553 //------------------------------------------------------------------------------------------------------------------------
554 // Field resolution
556 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
557 KlassHandle resolved_klass,
558 KlassHandle sel_klass,
559 fieldDescriptor& fd,
560 TRAPS) {
561 if (!Reflection::verify_field_access(ref_klass(),
562 resolved_klass(),
563 sel_klass(),
564 fd.access_flags(),
565 true)) {
566 ResourceMark rm(THREAD);
567 Exceptions::fthrow(
568 THREAD_AND_LOCATION,
569 vmSymbols::java_lang_IllegalAccessError(),
570 "tried to access field %s.%s from class %s",
571 sel_klass->external_name(),
572 fd.name()->as_C_string(),
573 ref_klass->external_name()
574 );
575 return;
576 }
577 }
579 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
580 resolve_field(result, pool, index, byte, check_only, true, CHECK);
581 }
583 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
584 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
585 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
587 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
588 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
590 // resolve specified klass
591 KlassHandle resolved_klass;
592 if (update_pool) {
593 resolve_klass(resolved_klass, pool, index, CHECK);
594 } else {
595 resolve_klass_no_update(resolved_klass, pool, index, CHECK);
596 }
597 // Load these early in case the resolve of the containing klass fails
598 Symbol* field = pool->name_ref_at(index);
599 Symbol* sig = pool->signature_ref_at(index);
600 // Check if there's a resolved klass containing the field
601 if( resolved_klass.is_null() ) {
602 ResourceMark rm(THREAD);
603 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
604 }
606 // Resolve instance field
607 fieldDescriptor fd; // find_field initializes fd if found
608 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
609 // check if field exists; i.e., if a klass containing the field def has been selected
610 if (sel_klass.is_null()){
611 ResourceMark rm(THREAD);
612 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
613 }
615 // check access
616 KlassHandle ref_klass(THREAD, pool->pool_holder());
617 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
619 // check for errors
620 if (is_static != fd.is_static()) {
621 ResourceMark rm(THREAD);
622 char msg[200];
623 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
624 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
625 }
627 // Final fields can only be accessed from its own class.
628 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
629 THROW(vmSymbols::java_lang_IllegalAccessError());
630 }
632 // initialize resolved_klass if necessary
633 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
634 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
635 //
636 // note 2: we don't want to force initialization if we are just checking
637 // if the field access is legal; e.g., during compilation
638 if (is_static && !check_only) {
639 sel_klass->initialize(CHECK);
640 }
642 {
643 HandleMark hm(THREAD);
644 Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader());
645 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
646 Symbol* signature_ref = pool->signature_ref_at(index);
647 {
648 ResourceMark rm(THREAD);
649 Symbol* failed_type_symbol =
650 SystemDictionary::check_signature_loaders(signature_ref,
651 ref_loader, sel_loader,
652 false,
653 CHECK);
654 if (failed_type_symbol != NULL) {
655 const char* msg = "loader constraint violation: when resolving field"
656 " \"%s\" the class loader (instance of %s) of the referring class, "
657 "%s, and the class loader (instance of %s) for the field's resolved "
658 "type, %s, have different Class objects for that type";
659 char* field_name = field->as_C_string();
660 const char* loader1 = SystemDictionary::loader_name(ref_loader());
661 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
662 const char* loader2 = SystemDictionary::loader_name(sel_loader());
663 char* failed_type_name = failed_type_symbol->as_C_string();
664 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
665 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
666 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
667 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
668 failed_type_name);
669 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
670 }
671 }
672 }
674 // return information. note that the klass is set to the actual klass containing the
675 // field, otherwise access of static fields in superclasses will not work.
676 KlassHandle holder (THREAD, fd.field_holder());
677 Symbol* name = fd.name();
678 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
679 }
682 //------------------------------------------------------------------------------------------------------------------------
683 // Invoke resolution
684 //
685 // Naming conventions:
686 //
687 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
688 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
689 // resolved_klass the specified klass (i.e., specified via constant pool index)
690 // recv_klass the receiver klass
693 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
694 Symbol* method_signature, KlassHandle current_klass,
695 bool check_access, bool initialize_class, TRAPS) {
696 methodHandle resolved_method;
697 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
698 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
700 // Initialize klass (this should only happen if everything is ok)
701 if (initialize_class && resolved_klass->should_be_initialized()) {
702 resolved_klass->initialize(CHECK);
703 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
704 }
706 // setup result
707 result.set_static(resolved_klass, resolved_method, CHECK);
708 }
710 // throws linktime exceptions
711 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
712 Symbol* method_name, Symbol* method_signature,
713 KlassHandle current_klass, bool check_access, TRAPS) {
715 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
716 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
718 // check if static
719 if (!resolved_method->is_static()) {
720 ResourceMark rm(THREAD);
721 char buf[200];
722 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
723 resolved_method->name(),
724 resolved_method->signature()));
725 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
726 }
727 }
730 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
731 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
732 methodHandle resolved_method;
733 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
734 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
735 }
737 // throws linktime exceptions
738 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
739 Symbol* method_name, Symbol* method_signature,
740 KlassHandle current_klass, bool check_access, TRAPS) {
742 if (resolved_klass->is_interface() && current_klass() != NULL) {
743 // If the target class is a direct interface, treat this as a "super"
744 // default call.
745 //
746 // If the current method is an overpass that happens to call a direct
747 // super-interface's method, then we'll end up rerunning the default method
748 // analysis even though we don't need to, but that's ok since it will end
749 // up with the same answer.
750 InstanceKlass* ik = InstanceKlass::cast(current_klass());
751 Array<Klass*>* interfaces = ik->local_interfaces();
752 int num_interfaces = interfaces->length();
753 for (int index = 0; index < num_interfaces; index++) {
754 if (interfaces->at(index) == resolved_klass()) {
755 Method* method = DefaultMethods::find_super_default(current_klass(),
756 resolved_klass(), method_name, method_signature, CHECK);
757 resolved_method = methodHandle(THREAD, method);
758 return;
759 }
760 }
761 }
763 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
765 // check if method name is <init>, that it is found in same klass as static type
766 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
767 resolved_method->method_holder() != resolved_klass()) {
768 ResourceMark rm(THREAD);
769 Exceptions::fthrow(
770 THREAD_AND_LOCATION,
771 vmSymbols::java_lang_NoSuchMethodError(),
772 "%s: method %s%s not found",
773 resolved_klass->external_name(),
774 resolved_method->name()->as_C_string(),
775 resolved_method->signature()->as_C_string()
776 );
777 return;
778 }
780 // check if not static
781 if (resolved_method->is_static()) {
782 ResourceMark rm(THREAD);
783 char buf[200];
784 jio_snprintf(buf, sizeof(buf),
785 "Expecting non-static method %s",
786 Method::name_and_sig_as_C_string(resolved_klass(),
787 resolved_method->name(),
788 resolved_method->signature()));
789 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
790 }
791 }
793 // throws runtime exceptions
794 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
795 KlassHandle current_klass, bool check_access, TRAPS) {
797 // resolved method is selected method unless we have an old-style lookup
798 methodHandle sel_method(THREAD, resolved_method());
800 // check if this is an old-style super call and do a new lookup if so
801 { KlassHandle method_klass = KlassHandle(THREAD,
802 resolved_method->method_holder());
804 const bool direct_calling_default_method =
805 resolved_klass() != NULL && resolved_method() != NULL &&
806 resolved_klass->is_interface() && !resolved_method->is_abstract();
808 if (!direct_calling_default_method &&
809 check_access &&
810 // a) check if ACC_SUPER flag is set for the current class
811 (current_klass->is_super() || !AllowNonVirtualCalls) &&
812 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
813 current_klass->is_subtype_of(method_klass()) &&
814 current_klass() != method_klass() &&
815 // c) check if the method is not <init>
816 resolved_method->name() != vmSymbols::object_initializer_name()) {
817 // Lookup super method
818 KlassHandle super_klass(THREAD, current_klass->super());
819 lookup_instance_method_in_klasses(sel_method, super_klass,
820 resolved_method->name(),
821 resolved_method->signature(), CHECK);
822 // check if found
823 if (sel_method.is_null()) {
824 ResourceMark rm(THREAD);
825 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
826 Method::name_and_sig_as_C_string(resolved_klass(),
827 resolved_method->name(),
828 resolved_method->signature()));
829 }
830 }
831 }
833 // check if not static
834 if (sel_method->is_static()) {
835 ResourceMark rm(THREAD);
836 char buf[200];
837 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
838 resolved_method->name(),
839 resolved_method->signature()));
840 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
841 }
843 // check if abstract
844 if (sel_method->is_abstract()) {
845 ResourceMark rm(THREAD);
846 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
847 Method::name_and_sig_as_C_string(resolved_klass(),
848 sel_method->name(),
849 sel_method->signature()));
850 }
852 // setup result
853 result.set_static(resolved_klass, sel_method, CHECK);
854 }
856 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
857 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
858 bool check_access, bool check_null_and_abstract, TRAPS) {
859 methodHandle resolved_method;
860 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
861 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
862 }
864 // throws linktime exceptions
865 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
866 Symbol* method_name, Symbol* method_signature,
867 KlassHandle current_klass, bool check_access, TRAPS) {
868 // normal method resolution
869 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
871 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
872 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
874 // check if not static
875 if (resolved_method->is_static()) {
876 ResourceMark rm(THREAD);
877 char buf[200];
878 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
879 resolved_method->name(),
880 resolved_method->signature()));
881 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
882 }
883 }
885 // throws runtime exceptions
886 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
887 methodHandle resolved_method,
888 KlassHandle resolved_klass,
889 Handle recv,
890 KlassHandle recv_klass,
891 bool check_null_and_abstract,
892 TRAPS) {
894 // setup default return values
895 int vtable_index = Method::invalid_vtable_index;
896 methodHandle selected_method;
898 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
900 // runtime method resolution
901 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
902 THROW(vmSymbols::java_lang_NullPointerException());
903 }
905 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
906 // has not been rewritten, and the vtable initialized.
907 assert(resolved_method->method_holder()->is_linked(), "must be linked");
909 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
910 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
911 // a missing receiver might result in a bogus lookup.
912 assert(resolved_method->method_holder()->is_linked(), "must be linked");
914 // do lookup based on receiver klass using the vtable index
915 if (resolved_method->method_holder()->is_interface()) { // miranda method
916 vtable_index = vtable_index_of_miranda_method(resolved_klass,
917 resolved_method->name(),
918 resolved_method->signature(), CHECK);
919 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
921 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
922 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
923 } else {
924 // at this point we are sure that resolved_method is virtual and not
925 // a miranda method; therefore, it must have a valid vtable index.
926 vtable_index = resolved_method->vtable_index();
927 // We could get a negative vtable_index for final methods,
928 // because as an optimization they are they are never put in the vtable,
929 // unless they override an existing method.
930 // If we do get a negative, it means the resolved method is the the selected
931 // method, and it can never be changed by an override.
932 if (vtable_index == Method::nonvirtual_vtable_index) {
933 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
934 selected_method = resolved_method;
935 } else {
936 // recv_klass might be an arrayKlassOop but all vtables start at
937 // the same place. The cast is to avoid virtual call and assertion.
938 InstanceKlass* inst = (InstanceKlass*)recv_klass();
939 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
940 }
941 }
943 // check if method exists
944 if (selected_method.is_null()) {
945 ResourceMark rm(THREAD);
946 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
947 Method::name_and_sig_as_C_string(resolved_klass(),
948 resolved_method->name(),
949 resolved_method->signature()));
950 }
952 // check if abstract
953 if (check_null_and_abstract && selected_method->is_abstract()) {
954 ResourceMark rm(THREAD);
955 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
956 Method::name_and_sig_as_C_string(resolved_klass(),
957 selected_method->name(),
958 selected_method->signature()));
959 }
961 // setup result
962 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
963 }
965 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
966 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
967 bool check_access, bool check_null_and_abstract, TRAPS) {
968 methodHandle resolved_method;
969 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
970 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
971 }
973 // throws linktime exceptions
974 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
975 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
976 // normal interface method resolution
977 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
979 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
980 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
981 }
983 // throws runtime exceptions
984 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
985 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
986 // check if receiver exists
987 if (check_null_and_abstract && recv.is_null()) {
988 THROW(vmSymbols::java_lang_NullPointerException());
989 }
991 // check if receiver klass implements the resolved interface
992 if (!recv_klass->is_subtype_of(resolved_klass())) {
993 ResourceMark rm(THREAD);
994 char buf[200];
995 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
996 recv_klass()->external_name(),
997 resolved_klass()->external_name());
998 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
999 }
1000 // do lookup based on receiver klass
1001 methodHandle sel_method;
1002 lookup_instance_method_in_klasses(sel_method, recv_klass,
1003 resolved_method->name(),
1004 resolved_method->signature(), CHECK);
1005 // check if method exists
1006 if (sel_method.is_null()) {
1007 ResourceMark rm(THREAD);
1008 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1009 Method::name_and_sig_as_C_string(recv_klass(),
1010 resolved_method->name(),
1011 resolved_method->signature()));
1012 }
1013 // check if public
1014 if (!sel_method->is_public()) {
1015 ResourceMark rm(THREAD);
1016 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1017 Method::name_and_sig_as_C_string(recv_klass(),
1018 sel_method->name(),
1019 sel_method->signature()));
1020 }
1021 // check if abstract
1022 if (check_null_and_abstract && sel_method->is_abstract()) {
1023 ResourceMark rm(THREAD);
1024 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1025 Method::name_and_sig_as_C_string(recv_klass(),
1026 sel_method->name(),
1027 sel_method->signature()));
1028 }
1029 // setup result
1030 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
1031 }
1034 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1035 KlassHandle resolved_klass,
1036 Symbol* method_name,
1037 Symbol* method_signature,
1038 KlassHandle current_klass,
1039 bool check_access) {
1040 EXCEPTION_MARK;
1041 methodHandle method_result;
1042 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1043 if (HAS_PENDING_EXCEPTION) {
1044 CLEAR_PENDING_EXCEPTION;
1045 return methodHandle();
1046 } else {
1047 return method_result;
1048 }
1049 }
1051 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1052 KlassHandle resolved_klass,
1053 Symbol* method_name,
1054 Symbol* method_signature,
1055 KlassHandle current_klass,
1056 bool check_access) {
1057 EXCEPTION_MARK;
1058 methodHandle method_result;
1059 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1060 if (HAS_PENDING_EXCEPTION) {
1061 CLEAR_PENDING_EXCEPTION;
1062 return methodHandle();
1063 } else {
1064 return method_result;
1065 }
1066 }
1068 methodHandle LinkResolver::resolve_virtual_call_or_null(
1069 KlassHandle receiver_klass,
1070 KlassHandle resolved_klass,
1071 Symbol* name,
1072 Symbol* signature,
1073 KlassHandle current_klass) {
1074 EXCEPTION_MARK;
1075 CallInfo info;
1076 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1077 if (HAS_PENDING_EXCEPTION) {
1078 CLEAR_PENDING_EXCEPTION;
1079 return methodHandle();
1080 }
1081 return info.selected_method();
1082 }
1084 methodHandle LinkResolver::resolve_interface_call_or_null(
1085 KlassHandle receiver_klass,
1086 KlassHandle resolved_klass,
1087 Symbol* name,
1088 Symbol* signature,
1089 KlassHandle current_klass) {
1090 EXCEPTION_MARK;
1091 CallInfo info;
1092 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1093 if (HAS_PENDING_EXCEPTION) {
1094 CLEAR_PENDING_EXCEPTION;
1095 return methodHandle();
1096 }
1097 return info.selected_method();
1098 }
1100 int LinkResolver::resolve_virtual_vtable_index(
1101 KlassHandle receiver_klass,
1102 KlassHandle resolved_klass,
1103 Symbol* name,
1104 Symbol* signature,
1105 KlassHandle current_klass) {
1106 EXCEPTION_MARK;
1107 CallInfo info;
1108 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1109 if (HAS_PENDING_EXCEPTION) {
1110 CLEAR_PENDING_EXCEPTION;
1111 return Method::invalid_vtable_index;
1112 }
1113 return info.vtable_index();
1114 }
1116 methodHandle LinkResolver::resolve_static_call_or_null(
1117 KlassHandle resolved_klass,
1118 Symbol* name,
1119 Symbol* signature,
1120 KlassHandle current_klass) {
1121 EXCEPTION_MARK;
1122 CallInfo info;
1123 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1124 if (HAS_PENDING_EXCEPTION) {
1125 CLEAR_PENDING_EXCEPTION;
1126 return methodHandle();
1127 }
1128 return info.selected_method();
1129 }
1131 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1132 KlassHandle current_klass) {
1133 EXCEPTION_MARK;
1134 CallInfo info;
1135 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1136 if (HAS_PENDING_EXCEPTION) {
1137 CLEAR_PENDING_EXCEPTION;
1138 return methodHandle();
1139 }
1140 return info.selected_method();
1141 }
1145 //------------------------------------------------------------------------------------------------------------------------
1146 // ConstantPool entries
1148 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1149 switch (byte) {
1150 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1151 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1152 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1153 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1154 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1155 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1156 }
1157 return;
1158 }
1160 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1161 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1162 // resolve klass
1163 resolve_klass(resolved_klass, pool, index, CHECK);
1165 // Get name, signature, and static klass
1166 method_name = pool->name_ref_at(index);
1167 method_signature = pool->signature_ref_at(index);
1168 current_klass = KlassHandle(THREAD, pool->pool_holder());
1169 }
1172 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1173 KlassHandle resolved_klass;
1174 Symbol* method_name = NULL;
1175 Symbol* method_signature = NULL;
1176 KlassHandle current_klass;
1177 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1178 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1179 }
1182 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1183 KlassHandle resolved_klass;
1184 Symbol* method_name = NULL;
1185 Symbol* method_signature = NULL;
1186 KlassHandle current_klass;
1187 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1188 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1189 }
1192 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1193 constantPoolHandle pool, int index,
1194 TRAPS) {
1196 KlassHandle resolved_klass;
1197 Symbol* method_name = NULL;
1198 Symbol* method_signature = NULL;
1199 KlassHandle current_klass;
1200 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1201 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1202 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1203 }
1206 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1207 KlassHandle resolved_klass;
1208 Symbol* method_name = NULL;
1209 Symbol* method_signature = NULL;
1210 KlassHandle current_klass;
1211 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1212 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1213 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1214 }
1217 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1218 assert(EnableInvokeDynamic, "");
1219 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1220 KlassHandle resolved_klass;
1221 Symbol* method_name = NULL;
1222 Symbol* method_signature = NULL;
1223 KlassHandle current_klass;
1224 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1225 if (TraceMethodHandles)
1226 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1227 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1228 }
1230 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1231 Symbol* method_name, Symbol* method_signature,
1232 KlassHandle current_klass,
1233 TRAPS) {
1234 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1235 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1236 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1237 methodHandle resolved_method;
1238 Handle resolved_appendix;
1239 Handle resolved_method_type;
1240 lookup_polymorphic_method(resolved_method, resolved_klass,
1241 method_name, method_signature,
1242 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1243 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1244 }
1247 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1248 assert(EnableInvokeDynamic, "");
1250 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1251 Symbol* method_name = pool->name_ref_at(index);
1252 Symbol* method_signature = pool->signature_ref_at(index);
1253 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1255 // Resolve the bootstrap specifier (BSM + optional arguments).
1256 Handle bootstrap_specifier;
1257 // Check if CallSite has been bound already:
1258 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1259 if (cpce->is_f1_null()) {
1260 int pool_index = cpce->constant_pool_index();
1261 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1262 assert(bsm_info != NULL, "");
1263 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1264 bootstrap_specifier = Handle(THREAD, bsm_info);
1265 }
1266 if (!cpce->is_f1_null()) {
1267 methodHandle method( THREAD, cpce->f1_as_method());
1268 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1269 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1270 result.set_handle(method, appendix, method_type, CHECK);
1271 return;
1272 }
1274 if (TraceMethodHandles) {
1275 tty->print_cr("resolve_invokedynamic #%d %s %s",
1276 ConstantPool::decode_invokedynamic_index(index),
1277 method_name->as_C_string(), method_signature->as_C_string());
1278 tty->print(" BSM info: "); bootstrap_specifier->print();
1279 }
1281 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1282 }
1284 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1285 Handle bootstrap_specifier,
1286 Symbol* method_name, Symbol* method_signature,
1287 KlassHandle current_klass,
1288 TRAPS) {
1289 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1290 // The appendix argument is likely to be a freshly-created CallSite.
1291 Handle resolved_appendix;
1292 Handle resolved_method_type;
1293 methodHandle resolved_method =
1294 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1295 bootstrap_specifier,
1296 method_name, method_signature,
1297 &resolved_appendix,
1298 &resolved_method_type,
1299 THREAD);
1300 if (HAS_PENDING_EXCEPTION) {
1301 if (TraceMethodHandles) {
1302 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION);
1303 PENDING_EXCEPTION->print();
1304 }
1305 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1306 // throw these guys, since they are already wrapped
1307 return;
1308 }
1309 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1310 // intercept only LinkageErrors which might have failed to wrap
1311 return;
1312 }
1313 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1314 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1315 CLEAR_PENDING_EXCEPTION;
1316 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1317 }
1318 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1319 }
1321 //------------------------------------------------------------------------------------------------------------------------
1322 #ifndef PRODUCT
1324 void FieldAccessInfo::print() {
1325 ResourceMark rm;
1326 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
1327 }
1329 #endif
