1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/defaultMethods.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "gc_interface/collectedHeap.inline.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "prims/nativeLookup.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/fieldDescriptor.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/reflection.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/thread.inline.hpp"
47 #include "runtime/vmThread.hpp"
48
49 //------------------------------------------------------------------------------------------------------------------------
50 // Implementation of FieldAccessInfo
51
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 }
61
62
63 //------------------------------------------------------------------------------------------------------------------------
64 // Implementation of CallInfo
65
66
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 }
71
72
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 }
85
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 }
91
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 }
106
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.
117
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 }
140
141
142 //------------------------------------------------------------------------------------------------------------------------
143 // Klass resolution
144
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 }
160
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 }
165
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 }
171
172
173 //------------------------------------------------------------------------------------------------------------------------
174 // Method resolution
175 //
176 // According to JVM spec. $5.4.3c & $5.4.3d
177
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 }
189
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 }
199
200
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 }
206
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 }
211
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 ResourceMark rm(THREAD);
221 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
222 vmIntrinsics::name_at(iid), klass->external_name(),
223 name->as_C_string(), full_signature->as_C_string());
224 }
225 if (EnableInvokeDynamic &&
226 klass() == SystemDictionary::MethodHandle_klass() &&
227 iid != vmIntrinsics::_none) {
228 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
229 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
230 // Do not erase last argument type (MemberName) if it is a static linkTo method.
231 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
232 TempNewSymbol basic_signature =
233 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
234 if (TraceMethodHandles) {
235 ResourceMark rm(THREAD);
236 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
237 name->as_C_string(),
238 full_signature->as_C_string(),
239 basic_signature->as_C_string());
240 }
241 result = SystemDictionary::find_method_handle_intrinsic(iid,
242 basic_signature,
243 CHECK);
244 if (result.not_null()) {
245 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
246 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
247 assert(basic_signature == result->signature(), "predict the result signature");
248 if (TraceMethodHandles) {
249 tty->print("lookup_polymorphic_method => intrinsic ");
250 result->print_on(tty);
251 }
252 return;
253 }
254 } else if (iid == vmIntrinsics::_invokeGeneric
255 && !THREAD->is_Compiler_thread()
256 && appendix_result_or_null != NULL) {
257 // This is a method with type-checking semantics.
258 // We will ask Java code to spin an adapter method for it.
259 if (!MethodHandles::enabled()) {
260 // Make sure the Java part of the runtime has been booted up.
261 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
262 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
263 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
264 Handle(),
265 Handle(),
266 true,
267 CHECK);
268 }
269 }
270
271 Handle appendix;
272 Handle method_type;
273 result = SystemDictionary::find_method_handle_invoker(name,
274 full_signature,
275 current_klass,
276 &appendix,
277 &method_type,
278 CHECK);
279 if (TraceMethodHandles) {
280 tty->print("lookup_polymorphic_method => (via Java) ");
281 result->print_on(tty);
282 tty->print(" lookup_polymorphic_method => appendix = ");
283 if (appendix.is_null()) tty->print_cr("(none)");
284 else appendix->print_on(tty);
285 }
286 if (result.not_null()) {
287 #ifdef ASSERT
288 ResourceMark rm(THREAD);
289
290 TempNewSymbol basic_signature =
291 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
292 int actual_size_of_params = result->size_of_parameters();
293 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
294 // +1 for MethodHandle.this, +1 for trailing MethodType
295 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
296 if (appendix.not_null()) expected_size_of_params += 1;
297 if (actual_size_of_params != expected_size_of_params) {
298 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
299 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
300 result->print();
301 }
302 assert(actual_size_of_params == expected_size_of_params,
303 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
304 #endif //ASSERT
305
306 assert(appendix_result_or_null != NULL, "");
307 (*appendix_result_or_null) = appendix;
308 (*method_type_result) = method_type;
309 return;
310 }
311 }
312 }
313 }
314
315 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
316 KlassHandle resolved_klass,
317 KlassHandle sel_klass,
318 methodHandle sel_method,
319 TRAPS) {
320
321 AccessFlags flags = sel_method->access_flags();
322
323 // Special case: arrays always override "clone". JVMS 2.15.
324 // If the resolved klass is an array class, and the declaring class
325 // is java.lang.Object and the method is "clone", set the flags
326 // to public.
327 //
328 // We'll check for the method name first, as that's most likely
329 // to be false (so we'll short-circuit out of these tests).
330 if (sel_method->name() == vmSymbols::clone_name() &&
331 sel_klass() == SystemDictionary::Object_klass() &&
332 resolved_klass->oop_is_array()) {
333 // We need to change "protected" to "public".
334 assert(flags.is_protected(), "clone not protected?");
335 jint new_flags = flags.as_int();
336 new_flags = new_flags & (~JVM_ACC_PROTECTED);
337 new_flags = new_flags | JVM_ACC_PUBLIC;
338 flags.set_flags(new_flags);
339 }
340 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
341
342 if (!Reflection::verify_field_access(ref_klass(),
343 resolved_klass(),
344 sel_klass(),
345 flags,
346 true)) {
347 ResourceMark rm(THREAD);
348 Exceptions::fthrow(
349 THREAD_AND_LOCATION,
350 vmSymbols::java_lang_IllegalAccessError(),
351 "tried to access method %s.%s%s from class %s",
352 sel_klass->external_name(),
353 sel_method->name()->as_C_string(),
354 sel_method->signature()->as_C_string(),
355 ref_klass->external_name()
356 );
357 return;
358 }
359 }
360
361 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
362 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
363
364 // resolve klass
365 if (code == Bytecodes::_invokedynamic) {
366 resolved_klass = SystemDictionary::MethodHandle_klass();
367 Symbol* method_name = vmSymbols::invoke_name();
368 Symbol* method_signature = pool->signature_ref_at(index);
369 KlassHandle current_klass(THREAD, pool->pool_holder());
370 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
371 return;
372 }
373
374 resolve_klass(resolved_klass, pool, index, CHECK);
375
376 Symbol* method_name = pool->name_ref_at(index);
377 Symbol* method_signature = pool->signature_ref_at(index);
378 KlassHandle current_klass(THREAD, pool->pool_holder());
379
380 if (pool->has_preresolution()
381 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
382 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
383 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
384 if (result_oop != NULL) {
385 resolved_method = methodHandle(THREAD, result_oop);
386 return;
387 }
388 }
389
390 if (code == Bytecodes::_invokeinterface) {
391 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
392 } else {
393 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
394 }
395 }
396
397 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
398 Symbol* method_name, Symbol* method_signature,
399 KlassHandle current_klass, bool check_access, TRAPS) {
400
401 Handle nested_exception;
402
403 // 1. lookup method in resolved klass and its super klasses
404 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
405
406 if (resolved_method.is_null()) { // not found in the class hierarchy
407 // 2. lookup method in all the interfaces implemented by the resolved klass
408 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
409
410 if (resolved_method.is_null()) {
411 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
412 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
413 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
414 if (HAS_PENDING_EXCEPTION) {
415 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
416 CLEAR_PENDING_EXCEPTION;
417 }
418 }
419
420 if (resolved_method.is_null()) {
421 // 3. method lookup failed
422 ResourceMark rm(THREAD);
423 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
424 Method::name_and_sig_as_C_string(resolved_klass(),
425 method_name,
426 method_signature),
427 nested_exception);
428 }
429 }
430
431 // 4. check if klass is not interface
432 if (resolved_klass->is_interface() && resolved_method->is_abstract()) {
433 ResourceMark rm(THREAD);
434 char buf[200];
435 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
436 resolved_klass()->external_name());
437 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
438 }
439
440 // 5. check if method is concrete
441 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
442 ResourceMark rm(THREAD);
443 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
444 Method::name_and_sig_as_C_string(resolved_klass(),
445 method_name,
446 method_signature));
447 }
448
449 // 6. access checks, access checking may be turned off when calling from within the VM.
450 if (check_access) {
451 assert(current_klass.not_null() , "current_klass should not be null");
452
453 // check if method can be accessed by the referring class
454 check_method_accessability(current_klass,
455 resolved_klass,
456 KlassHandle(THREAD, resolved_method->method_holder()),
457 resolved_method,
458 CHECK);
459
460 // check loader constraints
461 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
462 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
463 {
464 ResourceMark rm(THREAD);
465 Symbol* failed_type_symbol =
466 SystemDictionary::check_signature_loaders(method_signature, loader,
467 class_loader, true, CHECK);
468 if (failed_type_symbol != NULL) {
469 const char* msg = "loader constraint violation: when resolving method"
470 " \"%s\" the class loader (instance of %s) of the current class, %s,"
471 " and the class loader (instance of %s) for the method's defining class, %s, have"
472 " different Class objects for the type %s used in the signature";
473 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
474 const char* loader1 = SystemDictionary::loader_name(loader());
475 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
476 const char* loader2 = SystemDictionary::loader_name(class_loader());
477 char* target = InstanceKlass::cast(resolved_method->method_holder())
478 ->name()->as_C_string();
479 char* failed_type_name = failed_type_symbol->as_C_string();
480 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
481 strlen(current) + strlen(loader2) + strlen(target) +
482 strlen(failed_type_name) + 1;
483 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
484 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
485 target, failed_type_name);
486 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
487 }
488 }
489 }
490 }
491
492 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
493 KlassHandle resolved_klass,
494 Symbol* method_name,
495 Symbol* method_signature,
496 KlassHandle current_klass,
497 bool check_access, TRAPS) {
498
499 // check if klass is interface
500 if (!resolved_klass->is_interface()) {
501 ResourceMark rm(THREAD);
502 char buf[200];
503 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
504 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
505 }
506
507 // lookup method in this interface or its super, java.lang.Object
508 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
509
510 if (resolved_method.is_null()) {
511 // lookup method in all the super-interfaces
512 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
513 if (resolved_method.is_null()) {
514 // no method found
515 ResourceMark rm(THREAD);
516 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
517 Method::name_and_sig_as_C_string(resolved_klass(),
518 method_name,
519 method_signature));
520 }
521 }
522
523 if (check_access) {
524 HandleMark hm(THREAD);
525 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
526 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
527 {
528 ResourceMark rm(THREAD);
529 Symbol* failed_type_symbol =
530 SystemDictionary::check_signature_loaders(method_signature, loader,
531 class_loader, true, CHECK);
532 if (failed_type_symbol != NULL) {
533 const char* msg = "loader constraint violation: when resolving "
534 "interface method \"%s\" the class loader (instance of %s) of the "
535 "current class, %s, and the class loader (instance of %s) for "
536 "the method's defining class, %s, have different Class objects for the type %s "
537 "used in the signature";
538 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
539 const char* loader1 = SystemDictionary::loader_name(loader());
540 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
541 const char* loader2 = SystemDictionary::loader_name(class_loader());
542 char* target = InstanceKlass::cast(resolved_method->method_holder())
543 ->name()->as_C_string();
544 char* failed_type_name = failed_type_symbol->as_C_string();
545 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
546 strlen(current) + strlen(loader2) + strlen(target) +
547 strlen(failed_type_name) + 1;
548 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
549 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
550 target, failed_type_name);
551 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
552 }
553 }
554 }
555 }
556
557 //------------------------------------------------------------------------------------------------------------------------
558 // Field resolution
559
560 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
561 KlassHandle resolved_klass,
562 KlassHandle sel_klass,
563 fieldDescriptor& fd,
564 TRAPS) {
565 if (!Reflection::verify_field_access(ref_klass(),
566 resolved_klass(),
567 sel_klass(),
568 fd.access_flags(),
569 true)) {
570 ResourceMark rm(THREAD);
571 Exceptions::fthrow(
572 THREAD_AND_LOCATION,
573 vmSymbols::java_lang_IllegalAccessError(),
574 "tried to access field %s.%s from class %s",
575 sel_klass->external_name(),
576 fd.name()->as_C_string(),
577 ref_klass->external_name()
578 );
579 return;
580 }
581 }
582
583 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
584 resolve_field(result, pool, index, byte, check_only, true, CHECK);
585 }
586
587 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
588 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
589 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
590
591 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
592 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
593
594 // resolve specified klass
595 KlassHandle resolved_klass;
596 if (update_pool) {
597 resolve_klass(resolved_klass, pool, index, CHECK);
598 } else {
599 resolve_klass_no_update(resolved_klass, pool, index, CHECK);
600 }
601 // Load these early in case the resolve of the containing klass fails
602 Symbol* field = pool->name_ref_at(index);
603 Symbol* sig = pool->signature_ref_at(index);
604 // Check if there's a resolved klass containing the field
605 if( resolved_klass.is_null() ) {
606 ResourceMark rm(THREAD);
607 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
608 }
609
610 // Resolve instance field
611 fieldDescriptor fd; // find_field initializes fd if found
612 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
613 // check if field exists; i.e., if a klass containing the field def has been selected
614 if (sel_klass.is_null()){
615 ResourceMark rm(THREAD);
616 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
617 }
618
619 // check access
620 KlassHandle ref_klass(THREAD, pool->pool_holder());
621 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
622
623 // check for errors
624 if (is_static != fd.is_static()) {
625 ResourceMark rm(THREAD);
626 char msg[200];
627 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
628 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
629 }
630
631 // Final fields can only be accessed from its own class.
632 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
633 THROW(vmSymbols::java_lang_IllegalAccessError());
634 }
635
636 // initialize resolved_klass if necessary
637 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
638 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
639 //
640 // note 2: we don't want to force initialization if we are just checking
641 // if the field access is legal; e.g., during compilation
642 if (is_static && !check_only) {
643 sel_klass->initialize(CHECK);
644 }
645
646 {
647 HandleMark hm(THREAD);
648 Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader());
649 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
650 Symbol* signature_ref = pool->signature_ref_at(index);
651 {
652 ResourceMark rm(THREAD);
653 Symbol* failed_type_symbol =
654 SystemDictionary::check_signature_loaders(signature_ref,
655 ref_loader, sel_loader,
656 false,
657 CHECK);
658 if (failed_type_symbol != NULL) {
659 const char* msg = "loader constraint violation: when resolving field"
660 " \"%s\" the class loader (instance of %s) of the referring class, "
661 "%s, and the class loader (instance of %s) for the field's resolved "
662 "type, %s, have different Class objects for that type";
663 char* field_name = field->as_C_string();
664 const char* loader1 = SystemDictionary::loader_name(ref_loader());
665 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
666 const char* loader2 = SystemDictionary::loader_name(sel_loader());
667 char* failed_type_name = failed_type_symbol->as_C_string();
668 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
669 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
670 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
671 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
672 failed_type_name);
673 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
674 }
675 }
676 }
677
678 // return information. note that the klass is set to the actual klass containing the
679 // field, otherwise access of static fields in superclasses will not work.
680 KlassHandle holder (THREAD, fd.field_holder());
681 Symbol* name = fd.name();
682 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
683 }
684
685
686 //------------------------------------------------------------------------------------------------------------------------
687 // Invoke resolution
688 //
689 // Naming conventions:
690 //
691 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
692 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
693 // resolved_klass the specified klass (i.e., specified via constant pool index)
694 // recv_klass the receiver klass
695
696
697 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
698 Symbol* method_signature, KlassHandle current_klass,
699 bool check_access, bool initialize_class, TRAPS) {
700 methodHandle resolved_method;
701 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
702 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
703
704 // Initialize klass (this should only happen if everything is ok)
705 if (initialize_class && resolved_klass->should_be_initialized()) {
706 resolved_klass->initialize(CHECK);
707 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
708 }
709
710 // setup result
711 result.set_static(resolved_klass, resolved_method, CHECK);
712 }
713
714 // throws linktime exceptions
715 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
716 Symbol* method_name, Symbol* method_signature,
717 KlassHandle current_klass, bool check_access, TRAPS) {
718
719 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
720 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
721
722 // check if static
723 if (!resolved_method->is_static()) {
724 ResourceMark rm(THREAD);
725 char buf[200];
726 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
727 resolved_method->name(),
728 resolved_method->signature()));
729 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
730 }
731 }
732
733
734 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
735 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
736 methodHandle resolved_method;
737 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
738 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
739 }
740
741 // throws linktime exceptions
742 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
743 Symbol* method_name, Symbol* method_signature,
744 KlassHandle current_klass, bool check_access, TRAPS) {
745
746 if (resolved_klass->is_interface() && current_klass() != NULL) {
747 // If the target class is a direct interface, treat this as a "super"
748 // default call.
749 //
750 // If the current method is an overpass that happens to call a direct
751 // super-interface's method, then we'll end up rerunning the default method
752 // analysis even though we don't need to, but that's ok since it will end
753 // up with the same answer.
754 InstanceKlass* ik = InstanceKlass::cast(current_klass());
755 Array<Klass*>* interfaces = ik->local_interfaces();
756 int num_interfaces = interfaces->length();
757 for (int index = 0; index < num_interfaces; index++) {
758 if (interfaces->at(index) == resolved_klass()) {
759 Method* method = DefaultMethods::find_super_default(current_klass(),
760 resolved_klass(), method_name, method_signature, CHECK);
761 resolved_method = methodHandle(THREAD, method);
762 return;
763 }
764 }
765 }
766
767 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
768
769 // check if method name is <init>, that it is found in same klass as static type
770 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
771 resolved_method->method_holder() != resolved_klass()) {
772 ResourceMark rm(THREAD);
773 Exceptions::fthrow(
774 THREAD_AND_LOCATION,
775 vmSymbols::java_lang_NoSuchMethodError(),
776 "%s: method %s%s not found",
777 resolved_klass->external_name(),
778 resolved_method->name()->as_C_string(),
779 resolved_method->signature()->as_C_string()
780 );
781 return;
782 }
783
784 // check if not static
785 if (resolved_method->is_static()) {
786 ResourceMark rm(THREAD);
787 char buf[200];
788 jio_snprintf(buf, sizeof(buf),
789 "Expecting non-static method %s",
790 Method::name_and_sig_as_C_string(resolved_klass(),
791 resolved_method->name(),
792 resolved_method->signature()));
793 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
794 }
795 }
796
797 // throws runtime exceptions
798 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
799 KlassHandle current_klass, bool check_access, TRAPS) {
800
801 // resolved method is selected method unless we have an old-style lookup
802 methodHandle sel_method(THREAD, resolved_method());
803
804 // check if this is an old-style super call and do a new lookup if so
805 { KlassHandle method_klass = KlassHandle(THREAD,
806 resolved_method->method_holder());
807
808 const bool direct_calling_default_method =
809 resolved_klass() != NULL && resolved_method() != NULL &&
810 resolved_klass->is_interface() && !resolved_method->is_abstract();
811
812 if (!direct_calling_default_method &&
813 check_access &&
814 // a) check if ACC_SUPER flag is set for the current class
815 (current_klass->is_super() || !AllowNonVirtualCalls) &&
816 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
817 current_klass->is_subtype_of(method_klass()) &&
818 current_klass() != method_klass() &&
819 // c) check if the method is not <init>
820 resolved_method->name() != vmSymbols::object_initializer_name()) {
821 // Lookup super method
822 KlassHandle super_klass(THREAD, current_klass->super());
823 lookup_instance_method_in_klasses(sel_method, super_klass,
824 resolved_method->name(),
825 resolved_method->signature(), CHECK);
826 // check if found
827 if (sel_method.is_null()) {
828 ResourceMark rm(THREAD);
829 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
830 Method::name_and_sig_as_C_string(resolved_klass(),
831 resolved_method->name(),
832 resolved_method->signature()));
833 }
834 }
835 }
836
837 // check if not static
838 if (sel_method->is_static()) {
839 ResourceMark rm(THREAD);
840 char buf[200];
841 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
842 resolved_method->name(),
843 resolved_method->signature()));
844 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
845 }
846
847 // check if abstract
848 if (sel_method->is_abstract()) {
849 ResourceMark rm(THREAD);
850 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
851 Method::name_and_sig_as_C_string(resolved_klass(),
852 sel_method->name(),
853 sel_method->signature()));
854 }
855
856 // setup result
857 result.set_static(resolved_klass, sel_method, CHECK);
858 }
859
860 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
861 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
862 bool check_access, bool check_null_and_abstract, TRAPS) {
863 methodHandle resolved_method;
864 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
865 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
866 }
867
868 // throws linktime exceptions
869 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
870 Symbol* method_name, Symbol* method_signature,
871 KlassHandle current_klass, bool check_access, TRAPS) {
872 // normal method resolution
873 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
874
875 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
876 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
877
878 // check if not static
879 if (resolved_method->is_static()) {
880 ResourceMark rm(THREAD);
881 char buf[200];
882 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
883 resolved_method->name(),
884 resolved_method->signature()));
885 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
886 }
887 }
888
889 // throws runtime exceptions
890 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
891 methodHandle resolved_method,
892 KlassHandle resolved_klass,
893 Handle recv,
894 KlassHandle recv_klass,
895 bool check_null_and_abstract,
896 TRAPS) {
897
898 // setup default return values
899 int vtable_index = Method::invalid_vtable_index;
900 methodHandle selected_method;
901
902 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
903
904 // runtime method resolution
905 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
906 THROW(vmSymbols::java_lang_NullPointerException());
907 }
908
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.
911 assert(resolved_method->method_holder()->is_linked(), "must be linked");
912
913 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
914 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
915 // a missing receiver might result in a bogus lookup.
916 assert(resolved_method->method_holder()->is_linked(), "must be linked");
917
918 // do lookup based on receiver klass using the vtable index
919 if (resolved_method->method_holder()->is_interface()) { // miranda method
920 vtable_index = vtable_index_of_miranda_method(resolved_klass,
921 resolved_method->name(),
922 resolved_method->signature(), CHECK);
923 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
924
925 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
926 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
927 } else {
928 // at this point we are sure that resolved_method is virtual and not
929 // a miranda method; therefore, it must have a valid vtable index.
930 vtable_index = resolved_method->vtable_index();
931 // We could get a negative vtable_index for final methods,
932 // because as an optimization they are they are never put in the vtable,
933 // unless they override an existing method.
934 // If we do get a negative, it means the resolved method is the the selected
935 // method, and it can never be changed by an override.
936 if (vtable_index == Method::nonvirtual_vtable_index) {
937 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
938 selected_method = resolved_method;
939 } else {
940 // recv_klass might be an arrayKlassOop but all vtables start at
941 // the same place. The cast is to avoid virtual call and assertion.
942 InstanceKlass* inst = (InstanceKlass*)recv_klass();
943 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
944 }
945 }
946
947 // check if method exists
948 if (selected_method.is_null()) {
949 ResourceMark rm(THREAD);
950 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
951 Method::name_and_sig_as_C_string(resolved_klass(),
952 resolved_method->name(),
953 resolved_method->signature()));
954 }
955
956 // check if abstract
957 if (check_null_and_abstract && selected_method->is_abstract()) {
958 ResourceMark rm(THREAD);
959 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
960 Method::name_and_sig_as_C_string(resolved_klass(),
961 selected_method->name(),
962 selected_method->signature()));
963 }
964
965 // setup result
966 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
967 }
968
969 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
970 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
971 bool check_access, bool check_null_and_abstract, TRAPS) {
972 methodHandle resolved_method;
973 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
974 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
975 }
976
977 // throws linktime exceptions
978 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
979 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
980 // normal interface method resolution
981 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
982
983 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
984 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
985 }
986
987 // throws runtime exceptions
988 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
989 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
990 // check if receiver exists
991 if (check_null_and_abstract && recv.is_null()) {
992 THROW(vmSymbols::java_lang_NullPointerException());
993 }
994
995 // check if receiver klass implements the resolved interface
996 if (!recv_klass->is_subtype_of(resolved_klass())) {
997 ResourceMark rm(THREAD);
998 char buf[200];
999 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1000 recv_klass()->external_name(),
1001 resolved_klass()->external_name());
1002 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1003 }
1004 // do lookup based on receiver klass
1005 methodHandle sel_method;
1006 lookup_instance_method_in_klasses(sel_method, recv_klass,
1007 resolved_method->name(),
1008 resolved_method->signature(), CHECK);
1009 // check if method exists
1010 if (sel_method.is_null()) {
1011 ResourceMark rm(THREAD);
1012 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1013 Method::name_and_sig_as_C_string(recv_klass(),
1014 resolved_method->name(),
1015 resolved_method->signature()));
1016 }
1017 // check access
1018 if (sel_method->method_holder()->is_interface()) {
1019 // Method holder is an interface. Throw Illegal Access Error if sel_method
1020 // is neither public nor private.
1021 if (!(sel_method->is_public() || sel_method->is_private())) {
1022 ResourceMark rm(THREAD);
1023 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1024 Method::name_and_sig_as_C_string(recv_klass(),
1025 sel_method->name(),
1026 sel_method->signature()));
1027 }
1028 }
1029 else {
1030 // Method holder is a class. Throw Illegal Access Error if sel_method
1031 // is not public.
1032 if (!sel_method->is_public()) {
1033 ResourceMark rm(THREAD);
1034 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1035 Method::name_and_sig_as_C_string(recv_klass(),
1036 sel_method->name(),
1037 sel_method->signature()));
1038 }
1039 }
1040 // check if abstract
1041 if (check_null_and_abstract && sel_method->is_abstract()) {
1042 ResourceMark rm(THREAD);
1043 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1044 Method::name_and_sig_as_C_string(recv_klass(),
1045 sel_method->name(),
1046 sel_method->signature()));
1047 }
1048 // setup result
1049 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
1050 }
1051
1052
1053 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1054 KlassHandle resolved_klass,
1055 Symbol* method_name,
1056 Symbol* method_signature,
1057 KlassHandle current_klass,
1058 bool check_access) {
1059 EXCEPTION_MARK;
1060 methodHandle method_result;
1061 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1062 if (HAS_PENDING_EXCEPTION) {
1063 CLEAR_PENDING_EXCEPTION;
1064 return methodHandle();
1065 } else {
1066 return method_result;
1067 }
1068 }
1069
1070 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1071 KlassHandle resolved_klass,
1072 Symbol* method_name,
1073 Symbol* method_signature,
1074 KlassHandle current_klass,
1075 bool check_access) {
1076 EXCEPTION_MARK;
1077 methodHandle method_result;
1078 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1079 if (HAS_PENDING_EXCEPTION) {
1080 CLEAR_PENDING_EXCEPTION;
1081 return methodHandle();
1082 } else {
1083 return method_result;
1084 }
1085 }
1086
1087 methodHandle LinkResolver::resolve_virtual_call_or_null(
1088 KlassHandle receiver_klass,
1089 KlassHandle resolved_klass,
1090 Symbol* name,
1091 Symbol* signature,
1092 KlassHandle current_klass) {
1093 EXCEPTION_MARK;
1094 CallInfo info;
1095 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1096 if (HAS_PENDING_EXCEPTION) {
1097 CLEAR_PENDING_EXCEPTION;
1098 return methodHandle();
1099 }
1100 return info.selected_method();
1101 }
1102
1103 methodHandle LinkResolver::resolve_interface_call_or_null(
1104 KlassHandle receiver_klass,
1105 KlassHandle resolved_klass,
1106 Symbol* name,
1107 Symbol* signature,
1108 KlassHandle current_klass) {
1109 EXCEPTION_MARK;
1110 CallInfo info;
1111 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1112 if (HAS_PENDING_EXCEPTION) {
1113 CLEAR_PENDING_EXCEPTION;
1114 return methodHandle();
1115 }
1116 return info.selected_method();
1117 }
1118
1119 int LinkResolver::resolve_virtual_vtable_index(
1120 KlassHandle receiver_klass,
1121 KlassHandle resolved_klass,
1122 Symbol* name,
1123 Symbol* signature,
1124 KlassHandle current_klass) {
1125 EXCEPTION_MARK;
1126 CallInfo info;
1127 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1128 if (HAS_PENDING_EXCEPTION) {
1129 CLEAR_PENDING_EXCEPTION;
1130 return Method::invalid_vtable_index;
1131 }
1132 return info.vtable_index();
1133 }
1134
1135 methodHandle LinkResolver::resolve_static_call_or_null(
1136 KlassHandle resolved_klass,
1137 Symbol* name,
1138 Symbol* signature,
1139 KlassHandle current_klass) {
1140 EXCEPTION_MARK;
1141 CallInfo info;
1142 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1143 if (HAS_PENDING_EXCEPTION) {
1144 CLEAR_PENDING_EXCEPTION;
1145 return methodHandle();
1146 }
1147 return info.selected_method();
1148 }
1149
1150 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1151 KlassHandle current_klass) {
1152 EXCEPTION_MARK;
1153 CallInfo info;
1154 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1155 if (HAS_PENDING_EXCEPTION) {
1156 CLEAR_PENDING_EXCEPTION;
1157 return methodHandle();
1158 }
1159 return info.selected_method();
1160 }
1161
1162
1163
1164 //------------------------------------------------------------------------------------------------------------------------
1165 // ConstantPool entries
1166
1167 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1168 switch (byte) {
1169 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1170 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1171 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1172 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1173 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1174 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1175 }
1176 return;
1177 }
1178
1179 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1180 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1181 // resolve klass
1182 resolve_klass(resolved_klass, pool, index, CHECK);
1183
1184 // Get name, signature, and static klass
1185 method_name = pool->name_ref_at(index);
1186 method_signature = pool->signature_ref_at(index);
1187 current_klass = KlassHandle(THREAD, pool->pool_holder());
1188 }
1189
1190
1191 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1192 KlassHandle resolved_klass;
1193 Symbol* method_name = NULL;
1194 Symbol* method_signature = NULL;
1195 KlassHandle current_klass;
1196 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1197 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1198 }
1199
1200
1201 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1202 KlassHandle resolved_klass;
1203 Symbol* method_name = NULL;
1204 Symbol* method_signature = NULL;
1205 KlassHandle current_klass;
1206 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1207 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1208 }
1209
1210
1211 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1212 constantPoolHandle pool, int index,
1213 TRAPS) {
1214
1215 KlassHandle resolved_klass;
1216 Symbol* method_name = NULL;
1217 Symbol* method_signature = NULL;
1218 KlassHandle current_klass;
1219 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1220 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1221 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1222 }
1223
1224
1225 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1226 KlassHandle resolved_klass;
1227 Symbol* method_name = NULL;
1228 Symbol* method_signature = NULL;
1229 KlassHandle current_klass;
1230 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1231 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1232 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1233 }
1234
1235
1236 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1237 assert(EnableInvokeDynamic, "");
1238 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1239 KlassHandle resolved_klass;
1240 Symbol* method_name = NULL;
1241 Symbol* method_signature = NULL;
1242 KlassHandle current_klass;
1243 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1244 if (TraceMethodHandles) {
1245 ResourceMark rm(THREAD);
1246 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1247 }
1248 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1249 }
1250
1251 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1252 Symbol* method_name, Symbol* method_signature,
1253 KlassHandle current_klass,
1254 TRAPS) {
1255 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1256 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1257 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1258 methodHandle resolved_method;
1259 Handle resolved_appendix;
1260 Handle resolved_method_type;
1261 lookup_polymorphic_method(resolved_method, resolved_klass,
1262 method_name, method_signature,
1263 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1264 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1265 }
1266
1267
1268 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1269 assert(EnableInvokeDynamic, "");
1270
1271 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1272 Symbol* method_name = pool->name_ref_at(index);
1273 Symbol* method_signature = pool->signature_ref_at(index);
1274 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1275
1276 // Resolve the bootstrap specifier (BSM + optional arguments).
1277 Handle bootstrap_specifier;
1278 // Check if CallSite has been bound already:
1279 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1280 if (cpce->is_f1_null()) {
1281 int pool_index = cpce->constant_pool_index();
1282 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1283 assert(bsm_info != NULL, "");
1284 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1285 bootstrap_specifier = Handle(THREAD, bsm_info);
1286 }
1287 if (!cpce->is_f1_null()) {
1288 methodHandle method( THREAD, cpce->f1_as_method());
1289 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1290 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1291 result.set_handle(method, appendix, method_type, CHECK);
1292 return;
1293 }
1294
1295 if (TraceMethodHandles) {
1296 tty->print_cr("resolve_invokedynamic #%d %s %s",
1297 ConstantPool::decode_invokedynamic_index(index),
1298 method_name->as_C_string(), method_signature->as_C_string());
1299 tty->print(" BSM info: "); bootstrap_specifier->print();
1300 }
1301
1302 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1303 }
1304
1305 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1306 Handle bootstrap_specifier,
1307 Symbol* method_name, Symbol* method_signature,
1308 KlassHandle current_klass,
1309 TRAPS) {
1310 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1311 // The appendix argument is likely to be a freshly-created CallSite.
1312 Handle resolved_appendix;
1313 Handle resolved_method_type;
1314 methodHandle resolved_method =
1315 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1316 bootstrap_specifier,
1317 method_name, method_signature,
1318 &resolved_appendix,
1319 &resolved_method_type,
1320 THREAD);
1321 if (HAS_PENDING_EXCEPTION) {
1322 if (TraceMethodHandles) {
1323 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION);
1324 PENDING_EXCEPTION->print();
1325 }
1326 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1327 // throw these guys, since they are already wrapped
1328 return;
1329 }
1330 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1331 // intercept only LinkageErrors which might have failed to wrap
1332 return;
1333 }
1334 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1335 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1336 CLEAR_PENDING_EXCEPTION;
1337 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1338 }
1339 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1340 }
1341
1342 //------------------------------------------------------------------------------------------------------------------------
1343 #ifndef PRODUCT
1344
1345 void FieldAccessInfo::print() {
1346 ResourceMark rm;
1347 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
1348 }
1349
1350 #endif