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/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "gc_interface/collectedHeap.inline.hpp"
30 #include "interpreter/bytecode.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/instanceKlass.hpp"
36 #include "oops/objArrayOop.hpp"
37 #include "prims/methodHandles.hpp"
38 #include "prims/nativeLookup.hpp"
39 #include "runtime/compilationPolicy.hpp"
40 #include "runtime/fieldDescriptor.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/handles.inline.hpp"
43 #include "runtime/reflection.hpp"
44 #include "runtime/signature.hpp"
45 #include "runtime/vmThread.hpp"
46 #ifdef TARGET_OS_FAMILY_linux
47 # include "thread_linux.inline.hpp"
48 #endif
49 #ifdef TARGET_OS_FAMILY_solaris
50 # include "thread_solaris.inline.hpp"
51 #endif
52 #ifdef TARGET_OS_FAMILY_windows
53 # include "thread_windows.inline.hpp"
54 #endif
55 #ifdef TARGET_OS_FAMILY_bsd
56 # include "thread_bsd.inline.hpp"
57 #endif
58
59 //------------------------------------------------------------------------------------------------------------------------
60 // Implementation of FieldAccessInfo
61
62 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset,
63 BasicType field_type, AccessFlags access_flags) {
64 _klass = klass;
65 _name = name;
66 _field_index = field_index;
67 _field_offset = field_offset;
68 _field_type = field_type;
69 _access_flags = access_flags;
70 }
71
72
73 //------------------------------------------------------------------------------------------------------------------------
74 // Implementation of CallInfo
75
76
77 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
78 int vtable_index = Method::nonvirtual_vtable_index;
79 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
80 }
81
82
83 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) {
84 // This is only called for interface methods. If the resolved_method
85 // comes from java/lang/Object, it can be the subject of a virtual call, so
86 // we should pick the vtable index from the resolved method.
87 // Other than that case, there is no valid vtable index to specify.
88 int vtable_index = Method::invalid_vtable_index;
89 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) {
90 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");
91 vtable_index = resolved_method->vtable_index();
92 }
93 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
94 }
95
96 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
97 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
98 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
99 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
100 }
101
102 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, TRAPS) {
103 if (resolved_method.is_null()) {
104 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
105 }
106 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
107 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
108 resolved_method->is_compiled_lambda_form(),
109 "linkMethod must return one of these");
110 int vtable_index = Method::nonvirtual_vtable_index;
111 assert(resolved_method->vtable_index() == vtable_index, "");
112 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
113 _resolved_appendix = resolved_appendix;
114 }
115
116 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
117 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
118 _resolved_klass = resolved_klass;
119 _selected_klass = selected_klass;
120 _resolved_method = resolved_method;
121 _selected_method = selected_method;
122 _vtable_index = vtable_index;
123 _resolved_appendix = Handle();
124 if (CompilationPolicy::must_be_compiled(selected_method)) {
125 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
126
127 // Note: with several active threads, the must_be_compiled may be true
128 // while can_be_compiled is false; remove assert
129 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
130 if (THREAD->is_Compiler_thread()) {
131 // don't force compilation, resolve was on behalf of compiler
132 return;
133 }
134 if (InstanceKlass::cast(selected_method->method_holder())->is_not_initialized()) {
135 // 'is_not_initialized' means not only '!is_initialized', but also that
136 // initialization has not been started yet ('!being_initialized')
137 // Do not force compilation of methods in uninitialized classes.
138 // Note that doing this would throw an assert later,
139 // in CompileBroker::compile_method.
140 // We sometimes use the link resolver to do reflective lookups
141 // even before classes are initialized.
142 return;
143 }
144 CompileBroker::compile_method(selected_method, InvocationEntryBci,
145 CompilationPolicy::policy()->initial_compile_level(),
146 methodHandle(), 0, "must_be_compiled", CHECK);
147 }
148 }
149
150
151 //------------------------------------------------------------------------------------------------------------------------
152 // Klass resolution
153
154 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
155 if (!Reflection::verify_class_access(ref_klass(),
156 sel_klass(),
157 true)) {
158 ResourceMark rm(THREAD);
159 Exceptions::fthrow(
160 THREAD_AND_LOCATION,
161 vmSymbols::java_lang_IllegalAccessError(),
162 "tried to access class %s from class %s",
163 sel_klass->external_name(),
164 ref_klass->external_name()
165 );
166 return;
167 }
168 }
169
170 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
171 Klass* result_oop = pool->klass_ref_at(index, CHECK);
172 result = KlassHandle(THREAD, result_oop);
173 }
174
175 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
176 Klass* result_oop =
177 ConstantPool::klass_ref_at_if_loaded_check(pool, index, CHECK);
178 result = KlassHandle(THREAD, result_oop);
179 }
180
181
182 //------------------------------------------------------------------------------------------------------------------------
183 // Method resolution
184 //
185 // According to JVM spec. $5.4.3c & $5.4.3d
186
187 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
188 Method* result_oop = klass->uncached_lookup_method(name, signature);
189 if (EnableInvokeDynamic && result_oop != NULL) {
190 vmIntrinsics::ID iid = result_oop->intrinsic_id();
191 if (MethodHandles::is_signature_polymorphic(iid)) {
192 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
193 return;
194 }
195 }
196 result = methodHandle(THREAD, result_oop);
197 }
198
199 // returns first instance method
200 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
201 Method* result_oop = klass->uncached_lookup_method(name, signature);
202 result = methodHandle(THREAD, result_oop);
203 while (!result.is_null() && result->is_static()) {
204 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super());
205 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));
206 }
207 }
208
209
210 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
211 ResourceMark rm(THREAD);
212 klassVtable *vt = InstanceKlass::cast(klass())->vtable();
213 return vt->index_of_miranda(name, signature);
214 }
215
216 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
217 InstanceKlass *ik = InstanceKlass::cast(klass());
218 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));
219 }
220
221 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
222 KlassHandle klass, Symbol* name, Symbol* full_signature,
223 KlassHandle current_klass,
224 Handle* appendix_result_or_null,
225 TRAPS) {
226 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
227 if (TraceMethodHandles) {
228 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
229 vmIntrinsics::name_at(iid), klass->external_name(),
230 name->as_C_string(), full_signature->as_C_string());
231 }
232 if (EnableInvokeDynamic &&
233 klass() == SystemDictionary::MethodHandle_klass() &&
234 iid != vmIntrinsics::_none) {
235 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
236 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
237 // Do not erase last argument type (MemberName) if it is a static linkTo method.
238 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
239 TempNewSymbol basic_signature =
240 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
241 if (TraceMethodHandles) {
242 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
243 name->as_C_string(),
244 full_signature->as_C_string(),
245 basic_signature->as_C_string());
246 }
247 result = SystemDictionary::find_method_handle_intrinsic(iid,
248 basic_signature,
249 CHECK);
250 if (result.not_null()) {
251 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
252 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
253 assert(basic_signature == result->signature(), "predict the result signature");
254 if (TraceMethodHandles) {
255 tty->print("lookup_polymorphic_method => intrinsic ");
256 result->print_on(tty);
257 }
258 return;
259 }
260 } else if (iid == vmIntrinsics::_invokeGeneric
261 && !THREAD->is_Compiler_thread()
262 && appendix_result_or_null != NULL) {
263 // This is a method with type-checking semantics.
264 // We will ask Java code to spin an adapter method for it.
265 if (!MethodHandles::enabled()) {
266 // Make sure the Java part of the runtime has been booted up.
267 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
268 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
269 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
270 Handle(),
271 Handle(),
272 true,
273 CHECK);
274 }
275 }
276
277 Handle appendix;
278 result = SystemDictionary::find_method_handle_invoker(name,
279 full_signature,
280 current_klass,
281 &appendix,
282 CHECK);
283 if (TraceMethodHandles) {
284 tty->print("lookup_polymorphic_method => (via Java) ");
285 result->print_on(tty);
286 tty->print(" lookup_polymorphic_method => appendix = ");
287 if (appendix.is_null()) tty->print_cr("(none)");
288 else appendix->print_on(tty);
289 }
290 if (result.not_null()) {
291 #ifdef ASSERT
292 TempNewSymbol basic_signature =
293 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
294 int actual_size_of_params = result->size_of_parameters();
295 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
296 // +1 for MethodHandle.this, +1 for trailing MethodType
297 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
298 if (appendix.not_null()) expected_size_of_params += 1;
299 if (actual_size_of_params != expected_size_of_params) {
300 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
301 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
302 result->print();
303 }
304 assert(actual_size_of_params == expected_size_of_params,
305 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
306 #endif //ASSERT
307
308 assert(appendix_result_or_null != NULL, "");
309 (*appendix_result_or_null) = appendix;
310 return;
311 }
312 }
313 }
314 }
315
316 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
317 KlassHandle resolved_klass,
318 KlassHandle sel_klass,
319 methodHandle sel_method,
320 TRAPS) {
321
322 AccessFlags flags = sel_method->access_flags();
323
324 // Special case: arrays always override "clone". JVMS 2.15.
325 // If the resolved klass is an array class, and the declaring class
326 // is java.lang.Object and the method is "clone", set the flags
327 // to public.
328 //
329 // We'll check for the method name first, as that's most likely
330 // to be false (so we'll short-circuit out of these tests).
331 if (sel_method->name() == vmSymbols::clone_name() &&
332 sel_klass() == SystemDictionary::Object_klass() &&
333 resolved_klass->oop_is_array()) {
334 // We need to change "protected" to "public".
335 assert(flags.is_protected(), "clone not protected?");
336 jint new_flags = flags.as_int();
337 new_flags = new_flags & (~JVM_ACC_PROTECTED);
338 new_flags = new_flags | JVM_ACC_PUBLIC;
339 flags.set_flags(new_flags);
340 }
341 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
342
343 if (!Reflection::verify_field_access(ref_klass(),
344 resolved_klass(),
345 sel_klass(),
346 flags,
347 true)) {
348 ResourceMark rm(THREAD);
349 Exceptions::fthrow(
350 THREAD_AND_LOCATION,
351 vmSymbols::java_lang_IllegalAccessError(),
352 "tried to access method %s.%s%s from class %s",
353 sel_klass->external_name(),
354 sel_method->name()->as_C_string(),
355 sel_method->signature()->as_C_string(),
356 ref_klass->external_name()
357 );
358 return;
359 }
360 }
361
362 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
363 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
364
365 // resolve klass
366 if (code == Bytecodes::_invokedynamic) {
367 resolved_klass = SystemDictionary::MethodHandle_klass();
368 Symbol* method_name = vmSymbols::invoke_name();
369 Symbol* method_signature = pool->signature_ref_at(index);
370 KlassHandle current_klass(THREAD, pool->pool_holder());
371 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
372 return;
373 }
374
375 resolve_klass(resolved_klass, pool, index, CHECK);
376
377 Symbol* method_name = pool->name_ref_at(index);
378 Symbol* method_signature = pool->signature_ref_at(index);
379 KlassHandle current_klass(THREAD, pool->pool_holder());
380
381 if (pool->has_preresolution()
382 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
383 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
384 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
385 if (result_oop != NULL) {
386 resolved_method = methodHandle(THREAD, result_oop);
387 return;
388 }
389 }
390
391 if (code == Bytecodes::_invokeinterface) {
392 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
393 } else {
394 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
395 }
396 }
397
398 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
399 Symbol* method_name, Symbol* method_signature,
400 KlassHandle current_klass, bool check_access, TRAPS) {
401
402 // 1. check if klass is not interface
403 if (resolved_klass->is_interface()) {
404 ResourceMark rm(THREAD);
405 char buf[200];
406 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name());
407 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
408 }
409
410 Handle nested_exception;
411
412 // 2. lookup method in resolved klass and its super klasses
413 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
414
415 if (resolved_method.is_null()) { // not found in the class hierarchy
416 // 3. lookup method in all the interfaces implemented by the resolved klass
417 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
418
419 if (resolved_method.is_null()) {
420 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
421 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
422 current_klass, (Handle*)NULL, THREAD);
423 if (HAS_PENDING_EXCEPTION) {
424 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
425 CLEAR_PENDING_EXCEPTION;
426 }
427 }
428
429 if (resolved_method.is_null()) {
430 // 4. method lookup failed
431 ResourceMark rm(THREAD);
432 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
433 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
434 method_name,
435 method_signature),
436 nested_exception);
437 }
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(Klass::cast(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, InstanceKlass::cast(resolved_method->method_holder())->class_loader());
463 {
464 ResourceMark rm(THREAD);
465 char* failed_type_name =
466 SystemDictionary::check_signature_loaders(method_signature, loader,
467 class_loader, true, CHECK);
468 if (failed_type_name != 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 resolved 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(Klass::cast(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* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string();
478 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
479 strlen(current) + strlen(loader2) + strlen(resolved) +
480 strlen(failed_type_name);
481 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
482 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
483 resolved, failed_type_name);
484 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
485 }
486 }
487 }
488 }
489
490 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
491 KlassHandle resolved_klass,
492 Symbol* method_name,
493 Symbol* method_signature,
494 KlassHandle current_klass,
495 bool check_access, TRAPS) {
496
497 // check if klass is interface
498 if (!resolved_klass->is_interface()) {
499 ResourceMark rm(THREAD);
500 char buf[200];
501 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name());
502 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
503 }
504
505 // lookup method in this interface or its super, java.lang.Object
506 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
507
508 if (resolved_method.is_null()) {
509 // lookup method in all the super-interfaces
510 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
511 if (resolved_method.is_null()) {
512 // no method found
513 ResourceMark rm(THREAD);
514 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
515 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
516 method_name,
517 method_signature));
518 }
519 }
520
521 if (check_access) {
522 HandleMark hm(THREAD);
523 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
524 Handle class_loader (THREAD, InstanceKlass::cast(resolved_method->method_holder())->class_loader());
525 {
526 ResourceMark rm(THREAD);
527 char* failed_type_name =
528 SystemDictionary::check_signature_loaders(method_signature, loader,
529 class_loader, true, CHECK);
530 if (failed_type_name != NULL) {
531 const char* msg = "loader constraint violation: when resolving "
532 "interface method \"%s\" the class loader (instance of %s) of the "
533 "current class, %s, and the class loader (instance of %s) for "
534 "resolved class, %s, have different Class objects for the type %s "
535 "used in the signature";
536 char* sig = Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature);
537 const char* loader1 = SystemDictionary::loader_name(loader());
538 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
539 const char* loader2 = SystemDictionary::loader_name(class_loader());
540 char* resolved = InstanceKlass::cast(resolved_klass())->name()->as_C_string();
541 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
542 strlen(current) + strlen(loader2) + strlen(resolved) +
543 strlen(failed_type_name);
544 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
545 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
546 resolved, failed_type_name);
547 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
548 }
549 }
550 }
551 }
552
553 //------------------------------------------------------------------------------------------------------------------------
554 // Field resolution
555
556 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
557 KlassHandle resolved_klass,
558 KlassHandle sel_klass,
559 fieldDescriptor& fd,
560 TRAPS) {
561 if (!Reflection::verify_field_access(ref_klass(),
562 resolved_klass(),
563 sel_klass(),
564 fd.access_flags(),
565 true)) {
566 ResourceMark rm(THREAD);
567 Exceptions::fthrow(
568 THREAD_AND_LOCATION,
569 vmSymbols::java_lang_IllegalAccessError(),
570 "tried to access field %s.%s from class %s",
571 sel_klass->external_name(),
572 fd.name()->as_C_string(),
573 ref_klass->external_name()
574 );
575 return;
576 }
577 }
578
579 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
580 resolve_field(result, pool, index, byte, check_only, true, CHECK);
581 }
582
583 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
584 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
585 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
586
587 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
588 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
589
590 // resolve specified klass
591 KlassHandle resolved_klass;
592 if (update_pool) {
593 resolve_klass(resolved_klass, pool, index, CHECK);
594 } else {
595 resolve_klass_no_update(resolved_klass, pool, index, CHECK);
596 }
597 // Load these early in case the resolve of the containing klass fails
598 Symbol* field = pool->name_ref_at(index);
599 Symbol* sig = pool->signature_ref_at(index);
600 // Check if there's a resolved klass containing the field
601 if( resolved_klass.is_null() ) {
602 ResourceMark rm(THREAD);
603 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
604 }
605
606 // Resolve instance field
607 fieldDescriptor fd; // find_field initializes fd if found
608 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
609 // check if field exists; i.e., if a klass containing the field def has been selected
610 if (sel_klass.is_null()){
611 ResourceMark rm(THREAD);
612 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
613 }
614
615 // check access
616 KlassHandle ref_klass(THREAD, pool->pool_holder());
617 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
618
619 // check for errors
620 if (is_static != fd.is_static()) {
621 ResourceMark rm(THREAD);
622 char msg[200];
623 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", Klass::cast(resolved_klass())->external_name(), fd.name()->as_C_string());
624 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
625 }
626
627 // Final fields can only be accessed from its own class.
628 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
629 THROW(vmSymbols::java_lang_IllegalAccessError());
630 }
631
632 // initialize resolved_klass if necessary
633 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
634 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
635 //
636 // note 2: we don't want to force initialization if we are just checking
637 // if the field access is legal; e.g., during compilation
638 if (is_static && !check_only) {
639 sel_klass->initialize(CHECK);
640 }
641
642 {
643 HandleMark hm(THREAD);
644 Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader());
645 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
646 Symbol* signature_ref = pool->signature_ref_at(index);
647 {
648 ResourceMark rm(THREAD);
649 char* failed_type_name =
650 SystemDictionary::check_signature_loaders(signature_ref,
651 ref_loader, sel_loader,
652 false,
653 CHECK);
654 if (failed_type_name != NULL) {
655 const char* msg = "loader constraint violation: when resolving field"
656 " \"%s\" the class loader (instance of %s) of the referring class, "
657 "%s, and the class loader (instance of %s) for the field's resolved "
658 "type, %s, have different Class objects for that type";
659 char* field_name = field->as_C_string();
660 const char* loader1 = SystemDictionary::loader_name(ref_loader());
661 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
662 const char* loader2 = SystemDictionary::loader_name(sel_loader());
663 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
664 strlen(sel) + strlen(loader2) + strlen(failed_type_name);
665 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
666 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
667 failed_type_name);
668 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
669 }
670 }
671 }
672
673 // return information. note that the klass is set to the actual klass containing the
674 // field, otherwise access of static fields in superclasses will not work.
675 KlassHandle holder (THREAD, fd.field_holder());
676 Symbol* name = fd.name();
677 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
678 }
679
680
681 //------------------------------------------------------------------------------------------------------------------------
682 // Invoke resolution
683 //
684 // Naming conventions:
685 //
686 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
687 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
688 // resolved_klass the specified klass (i.e., specified via constant pool index)
689 // recv_klass the receiver klass
690
691
692 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
693 Symbol* method_signature, KlassHandle current_klass,
694 bool check_access, bool initialize_class, TRAPS) {
695 methodHandle resolved_method;
696 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
697 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder()));
698
699 // Initialize klass (this should only happen if everything is ok)
700 if (initialize_class && resolved_klass->should_be_initialized()) {
701 resolved_klass->initialize(CHECK);
702 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
703 }
704
705 // setup result
706 result.set_static(resolved_klass, resolved_method, CHECK);
707 }
708
709 // throws linktime exceptions
710 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
711 Symbol* method_name, Symbol* method_signature,
712 KlassHandle current_klass, bool check_access, TRAPS) {
713
714 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
715 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
716
717 // check if static
718 if (!resolved_method->is_static()) {
719 ResourceMark rm(THREAD);
720 char buf[200];
721 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
722 resolved_method->name(),
723 resolved_method->signature()));
724 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
725 }
726 }
727
728
729 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
730 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
731 methodHandle resolved_method;
732 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
733 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
734 }
735
736 // throws linktime exceptions
737 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
738 Symbol* method_name, Symbol* method_signature,
739 KlassHandle current_klass, bool check_access, TRAPS) {
740
741 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
742
743 // check if method name is <init>, that it is found in same klass as static type
744 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
745 resolved_method->method_holder() != resolved_klass()) {
746 ResourceMark rm(THREAD);
747 Exceptions::fthrow(
748 THREAD_AND_LOCATION,
749 vmSymbols::java_lang_NoSuchMethodError(),
750 "%s: method %s%s not found",
751 resolved_klass->external_name(),
752 resolved_method->name()->as_C_string(),
753 resolved_method->signature()->as_C_string()
754 );
755 return;
756 }
757
758 // check if not static
759 if (resolved_method->is_static()) {
760 ResourceMark rm(THREAD);
761 char buf[200];
762 jio_snprintf(buf, sizeof(buf),
763 "Expecting non-static method %s",
764 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
765 resolved_method->name(),
766 resolved_method->signature()));
767 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
768 }
769 }
770
771 // throws runtime exceptions
772 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
773 KlassHandle current_klass, bool check_access, TRAPS) {
774
775 // resolved method is selected method unless we have an old-style lookup
776 methodHandle sel_method(THREAD, resolved_method());
777
778 // check if this is an old-style super call and do a new lookup if so
779 { KlassHandle method_klass = KlassHandle(THREAD,
780 resolved_method->method_holder());
781
782 if (check_access &&
783 // a) check if ACC_SUPER flag is set for the current class
784 current_klass->is_super() &&
785 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
786 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() &&
787 // c) check if the method is not <init>
788 resolved_method->name() != vmSymbols::object_initializer_name()) {
789 // Lookup super method
790 KlassHandle super_klass(THREAD, current_klass->super());
791 lookup_instance_method_in_klasses(sel_method, super_klass,
792 resolved_method->name(),
793 resolved_method->signature(), CHECK);
794 // check if found
795 if (sel_method.is_null()) {
796 ResourceMark rm(THREAD);
797 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
798 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
799 resolved_method->name(),
800 resolved_method->signature()));
801 }
802 }
803 }
804
805 // check if not static
806 if (sel_method->is_static()) {
807 ResourceMark rm(THREAD);
808 char buf[200];
809 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
810 resolved_method->name(),
811 resolved_method->signature()));
812 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
813 }
814
815 // check if abstract
816 if (sel_method->is_abstract()) {
817 ResourceMark rm(THREAD);
818 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
819 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
820 sel_method->name(),
821 sel_method->signature()));
822 }
823
824 // setup result
825 result.set_static(resolved_klass, sel_method, CHECK);
826 }
827
828 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
829 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
830 bool check_access, bool check_null_and_abstract, TRAPS) {
831 methodHandle resolved_method;
832 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
833 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
834 }
835
836 // throws linktime exceptions
837 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
838 Symbol* method_name, Symbol* method_signature,
839 KlassHandle current_klass, bool check_access, TRAPS) {
840 // normal method resolution
841 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
842
843 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
844 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
845
846 // check if not static
847 if (resolved_method->is_static()) {
848 ResourceMark rm(THREAD);
849 char buf[200];
850 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
851 resolved_method->name(),
852 resolved_method->signature()));
853 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
854 }
855 }
856
857 // throws runtime exceptions
858 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
859 methodHandle resolved_method,
860 KlassHandle resolved_klass,
861 Handle recv,
862 KlassHandle recv_klass,
863 bool check_null_and_abstract,
864 TRAPS) {
865
866 // setup default return values
867 int vtable_index = Method::invalid_vtable_index;
868 methodHandle selected_method;
869
870 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
871
872 // runtime method resolution
873 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
874 THROW(vmSymbols::java_lang_NullPointerException());
875 }
876
877 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
878 // has not been rewritten, and the vtable initialized.
879 assert(InstanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
880
881 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
882 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
883 // a missing receiver might result in a bogus lookup.
884 assert(InstanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
885
886 // do lookup based on receiver klass using the vtable index
887 if (resolved_method->method_holder()->is_interface()) { // miranda method
888 vtable_index = vtable_index_of_miranda_method(resolved_klass,
889 resolved_method->name(),
890 resolved_method->signature(), CHECK);
891 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
892
893 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
894 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
895 } else {
896 // at this point we are sure that resolved_method is virtual and not
897 // a miranda method; therefore, it must have a valid vtable index.
898 vtable_index = resolved_method->vtable_index();
899 // We could get a negative vtable_index for final methods,
900 // because as an optimization they are they are never put in the vtable,
901 // unless they override an existing method.
902 // If we do get a negative, it means the resolved method is the the selected
903 // method, and it can never be changed by an override.
904 if (vtable_index == Method::nonvirtual_vtable_index) {
905 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
906 selected_method = resolved_method;
907 } else {
908 // recv_klass might be an arrayKlassOop but all vtables start at
909 // the same place. The cast is to avoid virtual call and assertion.
910 InstanceKlass* inst = (InstanceKlass*)recv_klass();
911 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
912 }
913 }
914
915 // check if method exists
916 if (selected_method.is_null()) {
917 ResourceMark rm(THREAD);
918 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
919 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
920 resolved_method->name(),
921 resolved_method->signature()));
922 }
923
924 // check if abstract
925 if (check_null_and_abstract && selected_method->is_abstract()) {
926 ResourceMark rm(THREAD);
927 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
928 Method::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
929 selected_method->name(),
930 selected_method->signature()));
931 }
932
933 // setup result
934 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
935 }
936
937 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
938 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
939 bool check_access, bool check_null_and_abstract, TRAPS) {
940 methodHandle resolved_method;
941 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
942 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
943 }
944
945 // throws linktime exceptions
946 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
947 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
948 // normal interface method resolution
949 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
950
951 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
952 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
953 }
954
955 // throws runtime exceptions
956 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
957 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
958 // check if receiver exists
959 if (check_null_and_abstract && recv.is_null()) {
960 THROW(vmSymbols::java_lang_NullPointerException());
961 }
962
963 // check if receiver klass implements the resolved interface
964 if (!recv_klass->is_subtype_of(resolved_klass())) {
965 ResourceMark rm(THREAD);
966 char buf[200];
967 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
968 (Klass::cast(recv_klass()))->external_name(),
969 (Klass::cast(resolved_klass()))->external_name());
970 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
971 }
972 // do lookup based on receiver klass
973 methodHandle sel_method;
974 lookup_instance_method_in_klasses(sel_method, recv_klass,
975 resolved_method->name(),
976 resolved_method->signature(), CHECK);
977 // check if method exists
978 if (sel_method.is_null()) {
979 ResourceMark rm(THREAD);
980 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
981 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()),
982 resolved_method->name(),
983 resolved_method->signature()));
984 }
985 // check if public
986 if (!sel_method->is_public()) {
987 ResourceMark rm(THREAD);
988 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
989 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()),
990 sel_method->name(),
991 sel_method->signature()));
992 }
993 // check if abstract
994 if (check_null_and_abstract && sel_method->is_abstract()) {
995 ResourceMark rm(THREAD);
996 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
997 Method::name_and_sig_as_C_string(Klass::cast(recv_klass()),
998 sel_method->name(),
999 sel_method->signature()));
1000 }
1001 // setup result
1002 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
1003 }
1004
1005
1006 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1007 KlassHandle resolved_klass,
1008 Symbol* method_name,
1009 Symbol* method_signature,
1010 KlassHandle current_klass,
1011 bool check_access) {
1012 EXCEPTION_MARK;
1013 methodHandle method_result;
1014 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1015 if (HAS_PENDING_EXCEPTION) {
1016 CLEAR_PENDING_EXCEPTION;
1017 return methodHandle();
1018 } else {
1019 return method_result;
1020 }
1021 }
1022
1023 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1024 KlassHandle resolved_klass,
1025 Symbol* method_name,
1026 Symbol* method_signature,
1027 KlassHandle current_klass,
1028 bool check_access) {
1029 EXCEPTION_MARK;
1030 methodHandle method_result;
1031 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1032 if (HAS_PENDING_EXCEPTION) {
1033 CLEAR_PENDING_EXCEPTION;
1034 return methodHandle();
1035 } else {
1036 return method_result;
1037 }
1038 }
1039
1040 methodHandle LinkResolver::resolve_virtual_call_or_null(
1041 KlassHandle receiver_klass,
1042 KlassHandle resolved_klass,
1043 Symbol* name,
1044 Symbol* signature,
1045 KlassHandle current_klass) {
1046 EXCEPTION_MARK;
1047 CallInfo info;
1048 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1049 if (HAS_PENDING_EXCEPTION) {
1050 CLEAR_PENDING_EXCEPTION;
1051 return methodHandle();
1052 }
1053 return info.selected_method();
1054 }
1055
1056 methodHandle LinkResolver::resolve_interface_call_or_null(
1057 KlassHandle receiver_klass,
1058 KlassHandle resolved_klass,
1059 Symbol* name,
1060 Symbol* signature,
1061 KlassHandle current_klass) {
1062 EXCEPTION_MARK;
1063 CallInfo info;
1064 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1065 if (HAS_PENDING_EXCEPTION) {
1066 CLEAR_PENDING_EXCEPTION;
1067 return methodHandle();
1068 }
1069 return info.selected_method();
1070 }
1071
1072 int LinkResolver::resolve_virtual_vtable_index(
1073 KlassHandle receiver_klass,
1074 KlassHandle resolved_klass,
1075 Symbol* name,
1076 Symbol* signature,
1077 KlassHandle current_klass) {
1078 EXCEPTION_MARK;
1079 CallInfo info;
1080 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1081 if (HAS_PENDING_EXCEPTION) {
1082 CLEAR_PENDING_EXCEPTION;
1083 return Method::invalid_vtable_index;
1084 }
1085 return info.vtable_index();
1086 }
1087
1088 methodHandle LinkResolver::resolve_static_call_or_null(
1089 KlassHandle resolved_klass,
1090 Symbol* name,
1091 Symbol* signature,
1092 KlassHandle current_klass) {
1093 EXCEPTION_MARK;
1094 CallInfo info;
1095 resolve_static_call(info, 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_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1104 KlassHandle current_klass) {
1105 EXCEPTION_MARK;
1106 CallInfo info;
1107 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1108 if (HAS_PENDING_EXCEPTION) {
1109 CLEAR_PENDING_EXCEPTION;
1110 return methodHandle();
1111 }
1112 return info.selected_method();
1113 }
1114
1115
1116
1117 //------------------------------------------------------------------------------------------------------------------------
1118 // ConstantPool entries
1119
1120 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1121 switch (byte) {
1122 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1123 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1124 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1125 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1126 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1127 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1128 }
1129 return;
1130 }
1131
1132 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1133 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1134 // resolve klass
1135 resolve_klass(resolved_klass, pool, index, CHECK);
1136
1137 // Get name, signature, and static klass
1138 method_name = pool->name_ref_at(index);
1139 method_signature = pool->signature_ref_at(index);
1140 current_klass = KlassHandle(THREAD, pool->pool_holder());
1141 }
1142
1143
1144 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1145 KlassHandle resolved_klass;
1146 Symbol* method_name = NULL;
1147 Symbol* method_signature = NULL;
1148 KlassHandle current_klass;
1149 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1150 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1151 }
1152
1153
1154 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1155 KlassHandle resolved_klass;
1156 Symbol* method_name = NULL;
1157 Symbol* method_signature = NULL;
1158 KlassHandle current_klass;
1159 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1160 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1161 }
1162
1163
1164 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1165 constantPoolHandle pool, int index,
1166 TRAPS) {
1167
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 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1174 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1175 }
1176
1177
1178 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1179 KlassHandle resolved_klass;
1180 Symbol* method_name = NULL;
1181 Symbol* method_signature = NULL;
1182 KlassHandle current_klass;
1183 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1184 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1185 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1186 }
1187
1188
1189 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1190 assert(EnableInvokeDynamic, "");
1191 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
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 if (TraceMethodHandles)
1198 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1199 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1200 }
1201
1202 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1203 Symbol* method_name, Symbol* method_signature,
1204 KlassHandle current_klass,
1205 TRAPS) {
1206 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1207 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1208 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1209 methodHandle resolved_method;
1210 Handle resolved_appendix;
1211 lookup_polymorphic_method(resolved_method, resolved_klass,
1212 method_name, method_signature,
1213 current_klass, &resolved_appendix, CHECK);
1214 result.set_handle(resolved_method, resolved_appendix, CHECK);
1215 }
1216
1217
1218 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1219 assert(EnableInvokeDynamic, "");
1220 pool->set_invokedynamic(); // mark header to flag active call sites
1221
1222 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1223 Symbol* method_name = pool->name_ref_at(index);
1224 Symbol* method_signature = pool->signature_ref_at(index);
1225 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1226
1227 // Resolve the bootstrap specifier (BSM + optional arguments).
1228 Handle bootstrap_specifier;
1229 // Check if CallSite has been bound already:
1230 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1231 if (cpce->is_f1_null()) {
1232 int pool_index = cpce->constant_pool_index();
1233 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1234 assert(bsm_info != NULL, "");
1235 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1236 bootstrap_specifier = Handle(THREAD, bsm_info);
1237 }
1238 if (!cpce->is_f1_null()) {
1239 methodHandle method(THREAD, cpce->f1_as_method());
1240 Handle appendix(THREAD, cpce->appendix_if_resolved(pool));
1241 result.set_handle(method, appendix, CHECK);
1242 return;
1243 }
1244
1245 if (TraceMethodHandles) {
1246 tty->print_cr("resolve_invokedynamic #%d %s %s",
1247 ConstantPool::decode_invokedynamic_index(index),
1248 method_name->as_C_string(), method_signature->as_C_string());
1249 tty->print(" BSM info: "); bootstrap_specifier->print();
1250 }
1251
1252 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1253 }
1254
1255 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1256 Handle bootstrap_specifier,
1257 Symbol* method_name, Symbol* method_signature,
1258 KlassHandle current_klass,
1259 TRAPS) {
1260 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1261 // The appendix argument is likely to be a freshly-created CallSite.
1262 Handle resolved_appendix;
1263 methodHandle resolved_method =
1264 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1265 bootstrap_specifier,
1266 method_name, method_signature,
1267 &resolved_appendix,
1268 CHECK);
1269 if (HAS_PENDING_EXCEPTION) {
1270 if (TraceMethodHandles) {
1271 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION);
1272 PENDING_EXCEPTION->print();
1273 }
1274 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1275 // throw these guys, since they are already wrapped
1276 return;
1277 }
1278 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1279 // intercept only LinkageErrors which might have failed to wrap
1280 return;
1281 }
1282 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1283 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1284 CLEAR_PENDING_EXCEPTION;
1285 THROW_MSG_CAUSE(vmSymbols::java_lang_BootstrapMethodError(),
1286 "BootstrapMethodError", nested_exception)
1287 }
1288 result.set_handle(resolved_method, resolved_appendix, CHECK);
1289 }
1290
1291 //------------------------------------------------------------------------------------------------------------------------
1292 #ifndef PRODUCT
1293
1294 void FieldAccessInfo::print() {
1295 ResourceMark rm;
1296 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
1297 }
1298
1299 #endif