1 /*
2 * Copyright (c) 1997, 2012, 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 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 }
268
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
301
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 }
310
311 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
312 KlassHandle resolved_klass,
313 KlassHandle sel_klass,
314 methodHandle sel_method,
315 TRAPS) {
316
317 AccessFlags flags = sel_method->access_flags();
318
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");
337
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 }
356
357 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
358 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
359
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 }
369
370 resolve_klass(resolved_klass, pool, index, CHECK);
371
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());
375
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 }
385
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 }
392
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) {
396
397 Handle nested_exception;
398
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);
401
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);
405
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 }
415
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 }
426
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 }
435
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 }
444
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");
448
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);
455
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 char* failed_type_name =
462 SystemDictionary::check_signature_loaders(method_signature, loader,
463 class_loader, true, CHECK);
464 if (failed_type_name != 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 resolved 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* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string();
474 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
475 strlen(current) + strlen(loader2) + strlen(resolved) +
476 strlen(failed_type_name);
477 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
478 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
479 resolved, failed_type_name);
480 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
481 }
482 }
483 }
484 }
485
486 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
487 KlassHandle resolved_klass,
488 Symbol* method_name,
489 Symbol* method_signature,
490 KlassHandle current_klass,
491 bool check_access, TRAPS) {
492
493 // check if klass is interface
494 if (!resolved_klass->is_interface()) {
495 ResourceMark rm(THREAD);
496 char buf[200];
497 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
498 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
499 }
500
501 // lookup method in this interface or its super, java.lang.Object
502 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
503
504 if (resolved_method.is_null()) {
505 // lookup method in all the super-interfaces
506 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
507 if (resolved_method.is_null()) {
508 // no method found
509 ResourceMark rm(THREAD);
510 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
511 Method::name_and_sig_as_C_string(resolved_klass(),
512 method_name,
513 method_signature));
514 }
515 }
516
517 if (check_access) {
518 HandleMark hm(THREAD);
519 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
520 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
521 {
522 ResourceMark rm(THREAD);
523 char* failed_type_name =
524 SystemDictionary::check_signature_loaders(method_signature, loader,
525 class_loader, true, CHECK);
526 if (failed_type_name != NULL) {
527 const char* msg = "loader constraint violation: when resolving "
528 "interface method \"%s\" the class loader (instance of %s) of the "
529 "current class, %s, and the class loader (instance of %s) for "
530 "resolved class, %s, have different Class objects for the type %s "
531 "used in the signature";
532 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
533 const char* loader1 = SystemDictionary::loader_name(loader());
534 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
535 const char* loader2 = SystemDictionary::loader_name(class_loader());
536 char* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string();
537 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
538 strlen(current) + strlen(loader2) + strlen(resolved) +
539 strlen(failed_type_name);
540 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
541 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
542 resolved, failed_type_name);
543 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
544 }
545 }
546 }
547 }
548
549 //------------------------------------------------------------------------------------------------------------------------
550 // Field resolution
551
552 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
553 KlassHandle resolved_klass,
554 KlassHandle sel_klass,
555 fieldDescriptor& fd,
556 TRAPS) {
557 if (!Reflection::verify_field_access(ref_klass(),
558 resolved_klass(),
559 sel_klass(),
560 fd.access_flags(),
561 true)) {
562 ResourceMark rm(THREAD);
563 Exceptions::fthrow(
564 THREAD_AND_LOCATION,
565 vmSymbols::java_lang_IllegalAccessError(),
566 "tried to access field %s.%s from class %s",
567 sel_klass->external_name(),
568 fd.name()->as_C_string(),
569 ref_klass->external_name()
570 );
571 return;
572 }
573 }
574
575 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
576 resolve_field(result, pool, index, byte, check_only, true, CHECK);
577 }
578
579 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
580 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
581 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
582
583 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
584 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
585
586 // resolve specified klass
587 KlassHandle resolved_klass;
588 if (update_pool) {
589 resolve_klass(resolved_klass, pool, index, CHECK);
590 } else {
591 resolve_klass_no_update(resolved_klass, pool, index, CHECK);
592 }
593 // Load these early in case the resolve of the containing klass fails
594 Symbol* field = pool->name_ref_at(index);
595 Symbol* sig = pool->signature_ref_at(index);
596 // Check if there's a resolved klass containing the field
597 if( resolved_klass.is_null() ) {
598 ResourceMark rm(THREAD);
599 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
600 }
601
602 // Resolve instance field
603 fieldDescriptor fd; // find_field initializes fd if found
604 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
605 // check if field exists; i.e., if a klass containing the field def has been selected
606 if (sel_klass.is_null()){
607 ResourceMark rm(THREAD);
608 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
609 }
610
611 // check access
612 KlassHandle ref_klass(THREAD, pool->pool_holder());
613 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
614
615 // check for errors
616 if (is_static != fd.is_static()) {
617 ResourceMark rm(THREAD);
618 char msg[200];
619 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
620 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
621 }
622
623 // Final fields can only be accessed from its own class.
624 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
625 THROW(vmSymbols::java_lang_IllegalAccessError());
626 }
627
628 // initialize resolved_klass if necessary
629 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
630 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
631 //
632 // note 2: we don't want to force initialization if we are just checking
633 // if the field access is legal; e.g., during compilation
634 if (is_static && !check_only) {
635 sel_klass->initialize(CHECK);
636 }
637
638 {
639 HandleMark hm(THREAD);
640 Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader());
641 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
642 Symbol* signature_ref = pool->signature_ref_at(index);
643 {
644 ResourceMark rm(THREAD);
645 char* failed_type_name =
646 SystemDictionary::check_signature_loaders(signature_ref,
647 ref_loader, sel_loader,
648 false,
649 CHECK);
650 if (failed_type_name != NULL) {
651 const char* msg = "loader constraint violation: when resolving field"
652 " \"%s\" the class loader (instance of %s) of the referring class, "
653 "%s, and the class loader (instance of %s) for the field's resolved "
654 "type, %s, have different Class objects for that type";
655 char* field_name = field->as_C_string();
656 const char* loader1 = SystemDictionary::loader_name(ref_loader());
657 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
658 const char* loader2 = SystemDictionary::loader_name(sel_loader());
659 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
660 strlen(sel) + strlen(loader2) + strlen(failed_type_name);
661 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
662 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
663 failed_type_name);
664 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
665 }
666 }
667 }
668
669 // return information. note that the klass is set to the actual klass containing the
670 // field, otherwise access of static fields in superclasses will not work.
671 KlassHandle holder (THREAD, fd.field_holder());
672 Symbol* name = fd.name();
673 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
674 }
675
676
677 //------------------------------------------------------------------------------------------------------------------------
678 // Invoke resolution
679 //
680 // Naming conventions:
681 //
682 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
683 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
684 // resolved_klass the specified klass (i.e., specified via constant pool index)
685 // recv_klass the receiver klass
686
687
688 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
689 Symbol* method_signature, KlassHandle current_klass,
690 bool check_access, bool initialize_class, TRAPS) {
691 methodHandle resolved_method;
692 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
693 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
694
695 // Initialize klass (this should only happen if everything is ok)
696 if (initialize_class && resolved_klass->should_be_initialized()) {
697 resolved_klass->initialize(CHECK);
698 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
699 }
700
701 // setup result
702 result.set_static(resolved_klass, resolved_method, CHECK);
703 }
704
705 // throws linktime exceptions
706 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
707 Symbol* method_name, Symbol* method_signature,
708 KlassHandle current_klass, bool check_access, TRAPS) {
709
710 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
711 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
712
713 // check if static
714 if (!resolved_method->is_static()) {
715 ResourceMark rm(THREAD);
716 char buf[200];
717 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
718 resolved_method->name(),
719 resolved_method->signature()));
720 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
721 }
722 }
723
724
725 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
726 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
727 methodHandle resolved_method;
728 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
729 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
730 }
731
732 // throws linktime exceptions
733 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
734 Symbol* method_name, Symbol* method_signature,
735 KlassHandle current_klass, bool check_access, TRAPS) {
736
737 if (resolved_klass->is_interface() && current_klass() != NULL) {
738 // If the target class is a direct interface, treat this as a "super"
739 // default call.
740 //
741 // If the current method is an overpass that happens to call a direct
742 // super-interface's method, then we'll end up rerunning the default method
743 // analysis even though we don't need to, but that's ok since it will end
744 // up with the same answer.
745 InstanceKlass* ik = InstanceKlass::cast(current_klass());
746 Array<Klass*>* interfaces = ik->local_interfaces();
747 int num_interfaces = interfaces->length();
748 for (int index = 0; index < num_interfaces; index++) {
749 if (interfaces->at(index) == resolved_klass()) {
750 Method* method = DefaultMethods::find_super_default(current_klass(),
751 resolved_klass(), method_name, method_signature, CHECK);
752 resolved_method = methodHandle(THREAD, method);
753 return;
754 }
755 }
756 }
757
758 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
759
760 // check if method name is <init>, that it is found in same klass as static type
761 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
762 resolved_method->method_holder() != resolved_klass()) {
763 ResourceMark rm(THREAD);
764 Exceptions::fthrow(
765 THREAD_AND_LOCATION,
766 vmSymbols::java_lang_NoSuchMethodError(),
767 "%s: method %s%s not found",
768 resolved_klass->external_name(),
769 resolved_method->name()->as_C_string(),
770 resolved_method->signature()->as_C_string()
771 );
772 return;
773 }
774
775 // check if not static
776 if (resolved_method->is_static()) {
777 ResourceMark rm(THREAD);
778 char buf[200];
779 jio_snprintf(buf, sizeof(buf),
780 "Expecting non-static method %s",
781 Method::name_and_sig_as_C_string(resolved_klass(),
782 resolved_method->name(),
783 resolved_method->signature()));
784 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
785 }
786 }
787
788 // throws runtime exceptions
789 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
790 KlassHandle current_klass, bool check_access, TRAPS) {
791
792 // resolved method is selected method unless we have an old-style lookup
793 methodHandle sel_method(THREAD, resolved_method());
794
795 // check if this is an old-style super call and do a new lookup if so
796 { KlassHandle method_klass = KlassHandle(THREAD,
797 resolved_method->method_holder());
798
799 const bool direct_calling_default_method =
800 resolved_klass() != NULL && resolved_method() != NULL &&
801 resolved_klass->is_interface() && !resolved_method->is_abstract();
802
803 if (!direct_calling_default_method &&
804 check_access &&
805 // a) check if ACC_SUPER flag is set for the current class
806 current_klass->is_super() &&
807 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
808 current_klass->is_subtype_of(method_klass()) &&
809 current_klass() != method_klass() &&
810 // c) check if the method is not <init>
811 resolved_method->name() != vmSymbols::object_initializer_name()) {
812 // Lookup super method
813 KlassHandle super_klass(THREAD, current_klass->super());
814 lookup_instance_method_in_klasses(sel_method, super_klass,
815 resolved_method->name(),
816 resolved_method->signature(), CHECK);
817 // check if found
818 if (sel_method.is_null()) {
819 ResourceMark rm(THREAD);
820 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
821 Method::name_and_sig_as_C_string(resolved_klass(),
822 resolved_method->name(),
823 resolved_method->signature()));
824 }
825 }
826 }
827
828 // check if not static
829 if (sel_method->is_static()) {
830 ResourceMark rm(THREAD);
831 char buf[200];
832 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
833 resolved_method->name(),
834 resolved_method->signature()));
835 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
836 }
837
838 // check if abstract
839 if (sel_method->is_abstract()) {
840 ResourceMark rm(THREAD);
841 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
842 Method::name_and_sig_as_C_string(resolved_klass(),
843 sel_method->name(),
844 sel_method->signature()));
845 }
846
847 // setup result
848 result.set_static(resolved_klass, sel_method, CHECK);
849 }
850
851 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
852 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
853 bool check_access, bool check_null_and_abstract, TRAPS) {
854 methodHandle resolved_method;
855 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
856 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
857 }
858
859 // throws linktime exceptions
860 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
861 Symbol* method_name, Symbol* method_signature,
862 KlassHandle current_klass, bool check_access, TRAPS) {
863 // normal method resolution
864 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
865
866 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
867 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
868
869 // check if not static
870 if (resolved_method->is_static()) {
871 ResourceMark rm(THREAD);
872 char buf[200];
873 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
874 resolved_method->name(),
875 resolved_method->signature()));
876 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
877 }
878 }
879
880 // throws runtime exceptions
881 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
882 methodHandle resolved_method,
883 KlassHandle resolved_klass,
884 Handle recv,
885 KlassHandle recv_klass,
886 bool check_null_and_abstract,
887 TRAPS) {
888
889 // setup default return values
890 int vtable_index = Method::invalid_vtable_index;
891 methodHandle selected_method;
892
893 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
894
895 // runtime method resolution
896 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
897 THROW(vmSymbols::java_lang_NullPointerException());
898 }
899
900 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
901 // has not been rewritten, and the vtable initialized.
902 assert(resolved_method->method_holder()->is_linked(), "must be linked");
903
904 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
905 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
906 // a missing receiver might result in a bogus lookup.
907 assert(resolved_method->method_holder()->is_linked(), "must be linked");
908
909 // do lookup based on receiver klass using the vtable index
910 if (resolved_method->method_holder()->is_interface()) { // miranda method
911 vtable_index = vtable_index_of_miranda_method(resolved_klass,
912 resolved_method->name(),
913 resolved_method->signature(), CHECK);
914 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
915
916 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
917 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
918 } else {
919 // at this point we are sure that resolved_method is virtual and not
920 // a miranda method; therefore, it must have a valid vtable index.
921 vtable_index = resolved_method->vtable_index();
922 // We could get a negative vtable_index for final methods,
923 // because as an optimization they are they are never put in the vtable,
924 // unless they override an existing method.
925 // If we do get a negative, it means the resolved method is the the selected
926 // method, and it can never be changed by an override.
927 if (vtable_index == Method::nonvirtual_vtable_index) {
928 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
929 selected_method = resolved_method;
930 } else {
931 // recv_klass might be an arrayKlassOop but all vtables start at
932 // the same place. The cast is to avoid virtual call and assertion.
933 InstanceKlass* inst = (InstanceKlass*)recv_klass();
934 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
935 }
936 }
937
938 // check if method exists
939 if (selected_method.is_null()) {
940 ResourceMark rm(THREAD);
941 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
942 Method::name_and_sig_as_C_string(resolved_klass(),
943 resolved_method->name(),
944 resolved_method->signature()));
945 }
946
947 // check if abstract
948 if (check_null_and_abstract && selected_method->is_abstract()) {
949 ResourceMark rm(THREAD);
950 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
951 Method::name_and_sig_as_C_string(resolved_klass(),
952 selected_method->name(),
953 selected_method->signature()));
954 }
955
956 // setup result
957 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
958 }
959
960 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
961 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
962 bool check_access, bool check_null_and_abstract, TRAPS) {
963 methodHandle resolved_method;
964 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
965 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
966 }
967
968 // throws linktime exceptions
969 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
970 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
971 // normal interface method resolution
972 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
973
974 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
975 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
976 }
977
978 // throws runtime exceptions
979 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
980 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
981 // check if receiver exists
982 if (check_null_and_abstract && recv.is_null()) {
983 THROW(vmSymbols::java_lang_NullPointerException());
984 }
985
986 // check if receiver klass implements the resolved interface
987 if (!recv_klass->is_subtype_of(resolved_klass())) {
988 ResourceMark rm(THREAD);
989 char buf[200];
990 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
991 recv_klass()->external_name(),
992 resolved_klass()->external_name());
993 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
994 }
995 // do lookup based on receiver klass
996 methodHandle sel_method;
997 lookup_instance_method_in_klasses(sel_method, recv_klass,
998 resolved_method->name(),
999 resolved_method->signature(), CHECK);
1000 // check if method exists
1001 if (sel_method.is_null()) {
1002 ResourceMark rm(THREAD);
1003 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1004 Method::name_and_sig_as_C_string(recv_klass(),
1005 resolved_method->name(),
1006 resolved_method->signature()));
1007 }
1008 // check if public
1009 if (!sel_method->is_public()) {
1010 ResourceMark rm(THREAD);
1011 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1012 Method::name_and_sig_as_C_string(recv_klass(),
1013 sel_method->name(),
1014 sel_method->signature()));
1015 }
1016 // check if abstract
1017 if (check_null_and_abstract && sel_method->is_abstract()) {
1018 ResourceMark rm(THREAD);
1019 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1020 Method::name_and_sig_as_C_string(recv_klass(),
1021 sel_method->name(),
1022 sel_method->signature()));
1023 }
1024 // setup result
1025 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
1026 }
1027
1028
1029 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1030 KlassHandle resolved_klass,
1031 Symbol* method_name,
1032 Symbol* method_signature,
1033 KlassHandle current_klass,
1034 bool check_access) {
1035 EXCEPTION_MARK;
1036 methodHandle method_result;
1037 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1038 if (HAS_PENDING_EXCEPTION) {
1039 CLEAR_PENDING_EXCEPTION;
1040 return methodHandle();
1041 } else {
1042 return method_result;
1043 }
1044 }
1045
1046 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1047 KlassHandle resolved_klass,
1048 Symbol* method_name,
1049 Symbol* method_signature,
1050 KlassHandle current_klass,
1051 bool check_access) {
1052 EXCEPTION_MARK;
1053 methodHandle method_result;
1054 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1055 if (HAS_PENDING_EXCEPTION) {
1056 CLEAR_PENDING_EXCEPTION;
1057 return methodHandle();
1058 } else {
1059 return method_result;
1060 }
1061 }
1062
1063 methodHandle LinkResolver::resolve_virtual_call_or_null(
1064 KlassHandle receiver_klass,
1065 KlassHandle resolved_klass,
1066 Symbol* name,
1067 Symbol* signature,
1068 KlassHandle current_klass) {
1069 EXCEPTION_MARK;
1070 CallInfo info;
1071 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1072 if (HAS_PENDING_EXCEPTION) {
1073 CLEAR_PENDING_EXCEPTION;
1074 return methodHandle();
1075 }
1076 return info.selected_method();
1077 }
1078
1079 methodHandle LinkResolver::resolve_interface_call_or_null(
1080 KlassHandle receiver_klass,
1081 KlassHandle resolved_klass,
1082 Symbol* name,
1083 Symbol* signature,
1084 KlassHandle current_klass) {
1085 EXCEPTION_MARK;
1086 CallInfo info;
1087 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1088 if (HAS_PENDING_EXCEPTION) {
1089 CLEAR_PENDING_EXCEPTION;
1090 return methodHandle();
1091 }
1092 return info.selected_method();
1093 }
1094
1095 int LinkResolver::resolve_virtual_vtable_index(
1096 KlassHandle receiver_klass,
1097 KlassHandle resolved_klass,
1098 Symbol* name,
1099 Symbol* signature,
1100 KlassHandle current_klass) {
1101 EXCEPTION_MARK;
1102 CallInfo info;
1103 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1104 if (HAS_PENDING_EXCEPTION) {
1105 CLEAR_PENDING_EXCEPTION;
1106 return Method::invalid_vtable_index;
1107 }
1108 return info.vtable_index();
1109 }
1110
1111 methodHandle LinkResolver::resolve_static_call_or_null(
1112 KlassHandle resolved_klass,
1113 Symbol* name,
1114 Symbol* signature,
1115 KlassHandle current_klass) {
1116 EXCEPTION_MARK;
1117 CallInfo info;
1118 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1119 if (HAS_PENDING_EXCEPTION) {
1120 CLEAR_PENDING_EXCEPTION;
1121 return methodHandle();
1122 }
1123 return info.selected_method();
1124 }
1125
1126 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1127 KlassHandle current_klass) {
1128 EXCEPTION_MARK;
1129 CallInfo info;
1130 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1131 if (HAS_PENDING_EXCEPTION) {
1132 CLEAR_PENDING_EXCEPTION;
1133 return methodHandle();
1134 }
1135 return info.selected_method();
1136 }
1137
1138
1139
1140 //------------------------------------------------------------------------------------------------------------------------
1141 // ConstantPool entries
1142
1143 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1144 switch (byte) {
1145 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1146 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1147 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1148 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1149 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1150 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1151 }
1152 return;
1153 }
1154
1155 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1156 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1157 // resolve klass
1158 resolve_klass(resolved_klass, pool, index, CHECK);
1159
1160 // Get name, signature, and static klass
1161 method_name = pool->name_ref_at(index);
1162 method_signature = pool->signature_ref_at(index);
1163 current_klass = KlassHandle(THREAD, pool->pool_holder());
1164 }
1165
1166
1167 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1168 KlassHandle resolved_klass;
1169 Symbol* method_name = NULL;
1170 Symbol* method_signature = NULL;
1171 KlassHandle current_klass;
1172 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1173 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1174 }
1175
1176
1177 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1178 KlassHandle resolved_klass;
1179 Symbol* method_name = NULL;
1180 Symbol* method_signature = NULL;
1181 KlassHandle current_klass;
1182 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1183 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1184 }
1185
1186
1187 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1188 constantPoolHandle pool, int index,
1189 TRAPS) {
1190
1191 KlassHandle resolved_klass;
1192 Symbol* method_name = NULL;
1193 Symbol* method_signature = NULL;
1194 KlassHandle current_klass;
1195 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1196 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1197 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1198 }
1199
1200
1201 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, 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 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1208 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1209 }
1210
1211
1212 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1213 assert(EnableInvokeDynamic, "");
1214 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
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 if (TraceMethodHandles)
1221 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1222 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1223 }
1224
1225 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1226 Symbol* method_name, Symbol* method_signature,
1227 KlassHandle current_klass,
1228 TRAPS) {
1229 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1230 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1231 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1232 methodHandle resolved_method;
1233 Handle resolved_appendix;
1234 Handle resolved_method_type;
1235 lookup_polymorphic_method(resolved_method, resolved_klass,
1236 method_name, method_signature,
1237 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1238 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1239 }
1240
1241
1242 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1243 assert(EnableInvokeDynamic, "");
1244 pool->set_invokedynamic(); // mark header to flag active call sites
1245
1246 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1247 Symbol* method_name = pool->name_ref_at(index);
1248 Symbol* method_signature = pool->signature_ref_at(index);
1249 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1250
1251 // Resolve the bootstrap specifier (BSM + optional arguments).
1252 Handle bootstrap_specifier;
1253 // Check if CallSite has been bound already:
1254 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1255 if (cpce->is_f1_null()) {
1256 int pool_index = cpce->constant_pool_index();
1257 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1258 assert(bsm_info != NULL, "");
1259 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1260 bootstrap_specifier = Handle(THREAD, bsm_info);
1261 }
1262 if (!cpce->is_f1_null()) {
1263 methodHandle method( THREAD, cpce->f1_as_method());
1264 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1265 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1266 result.set_handle(method, appendix, method_type, CHECK);
1267 return;
1268 }
1269
1270 if (TraceMethodHandles) {
1271 tty->print_cr("resolve_invokedynamic #%d %s %s",
1272 ConstantPool::decode_invokedynamic_index(index),
1273 method_name->as_C_string(), method_signature->as_C_string());
1274 tty->print(" BSM info: "); bootstrap_specifier->print();
1275 }
1276
1277 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1278 }
1279
1280 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1281 Handle bootstrap_specifier,
1282 Symbol* method_name, Symbol* method_signature,
1283 KlassHandle current_klass,
1284 TRAPS) {
1285 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1286 // The appendix argument is likely to be a freshly-created CallSite.
1287 Handle resolved_appendix;
1288 Handle resolved_method_type;
1289 methodHandle resolved_method =
1290 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1291 bootstrap_specifier,
1292 method_name, method_signature,
1293 &resolved_appendix,
1294 &resolved_method_type,
1295 THREAD);
1296 if (HAS_PENDING_EXCEPTION) {
1297 if (TraceMethodHandles) {
1298 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION);
1299 PENDING_EXCEPTION->print();
1300 }
1301 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1302 // throw these guys, since they are already wrapped
1303 return;
1304 }
1305 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1306 // intercept only LinkageErrors which might have failed to wrap
1307 return;
1308 }
1309 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1310 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1311 CLEAR_PENDING_EXCEPTION;
1312 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1313 }
1314 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1315 }
1316
1317 //------------------------------------------------------------------------------------------------------------------------
1318 #ifndef PRODUCT
1319
1320 void FieldAccessInfo::print() {
1321 ResourceMark rm;
1322 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
1323 }
1324
1325 #endif