1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/defaultMethods.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "gc_interface/collectedHeap.inline.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "prims/nativeLookup.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/fieldDescriptor.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/reflection.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/thread.inline.hpp"
47 #include "runtime/vmThread.hpp"
48
49
50 //------------------------------------------------------------------------------------------------------------------------
51 // Implementation of CallInfo
52
53
54 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
55 int vtable_index = Method::nonvirtual_vtable_index;
56 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
57 }
58
59
60 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index, TRAPS) {
61 // This is only called for interface methods. If the resolved_method
62 // comes from java/lang/Object, it can be the subject of a virtual call, so
63 // we should pick the vtable index from the resolved method.
64 // In that case, the caller must call set_virtual instead of set_interface.
65 assert(resolved_method->method_holder()->is_interface(), "");
66 assert(itable_index == resolved_method()->itable_index(), "");
67 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
68 }
69
70 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
71 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
72 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
73 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
74 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
75 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
76 }
77
78 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) {
79 if (resolved_method.is_null()) {
80 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
81 }
82 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
83 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
84 resolved_method->is_compiled_lambda_form(),
85 "linkMethod must return one of these");
86 int vtable_index = Method::nonvirtual_vtable_index;
87 assert(!resolved_method->has_vtable_index(), "");
88 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
89 _resolved_appendix = resolved_appendix;
90 _resolved_method_type = resolved_method_type;
91 }
92
93 void CallInfo::set_common(KlassHandle resolved_klass,
94 KlassHandle selected_klass,
95 methodHandle resolved_method,
96 methodHandle selected_method,
97 CallKind kind,
98 int index,
99 TRAPS) {
100 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
101 _resolved_klass = resolved_klass;
102 _selected_klass = selected_klass;
103 _resolved_method = resolved_method;
104 _selected_method = selected_method;
105 _call_kind = kind;
106 _call_index = index;
107 _resolved_appendix = Handle();
108 DEBUG_ONLY(verify()); // verify before making side effects
109
110 if (CompilationPolicy::must_be_compiled(selected_method)) {
111 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
112
113 // Note: with several active threads, the must_be_compiled may be true
114 // while can_be_compiled is false; remove assert
115 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
116 if (THREAD->is_Compiler_thread()) {
117 // don't force compilation, resolve was on behalf of compiler
118 return;
119 }
120 if (selected_method->method_holder()->is_not_initialized()) {
121 // 'is_not_initialized' means not only '!is_initialized', but also that
122 // initialization has not been started yet ('!being_initialized')
123 // Do not force compilation of methods in uninitialized classes.
124 // Note that doing this would throw an assert later,
125 // in CompileBroker::compile_method.
126 // We sometimes use the link resolver to do reflective lookups
127 // even before classes are initialized.
128 return;
129 }
130 CompileBroker::compile_method(selected_method, InvocationEntryBci,
131 CompilationPolicy::policy()->initial_compile_level(),
132 methodHandle(), 0, "must_be_compiled", CHECK);
133 }
134 }
135
136 // utility query for unreflecting a method
137 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
138 Klass* resolved_method_holder = resolved_method->method_holder();
139 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
140 resolved_klass = resolved_method_holder;
141 }
142 _resolved_klass = resolved_klass;
143 _selected_klass = resolved_klass;
144 _resolved_method = resolved_method;
145 _selected_method = resolved_method;
146 // classify:
147 CallKind kind = CallInfo::unknown_kind;
148 int index = resolved_method->vtable_index();
149 if (resolved_method->can_be_statically_bound()) {
150 kind = CallInfo::direct_call;
151 } else if (!resolved_method_holder->is_interface()) {
152 // Could be an Object method inherited into an interface, but still a vtable call.
153 kind = CallInfo::vtable_call;
154 } else if (!resolved_klass->is_interface()) {
155 // A miranda method. Compute the vtable index.
156 ResourceMark rm;
157 klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
158 index = vt->index_of_miranda(resolved_method->name(),
159 resolved_method->signature());
160 kind = CallInfo::vtable_call;
161 } else {
162 // A regular interface call.
163 kind = CallInfo::itable_call;
164 index = resolved_method->itable_index();
165 }
166 assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index));
167 _call_kind = kind;
168 _call_index = index;
169 _resolved_appendix = Handle();
170 DEBUG_ONLY(verify());
171 }
172
173 #ifdef ASSERT
174 void CallInfo::verify() {
175 switch (call_kind()) { // the meaning and allowed value of index depends on kind
176 case CallInfo::direct_call:
177 if (_call_index == Method::nonvirtual_vtable_index) break;
178 // else fall through to check vtable index:
179 case CallInfo::vtable_call:
180 assert(resolved_klass()->verify_vtable_index(_call_index), "");
181 break;
182 case CallInfo::itable_call:
183 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
184 break;
185 case CallInfo::unknown_kind:
186 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
187 break;
188 default:
189 fatal(err_msg_res("Unexpected call kind %d", call_kind()));
190 }
191 }
192 #endif //ASSERT
193
194
195
196 //------------------------------------------------------------------------------------------------------------------------
197 // Klass resolution
198
199 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
200 if (!Reflection::verify_class_access(ref_klass(),
201 sel_klass(),
202 true)) {
203 ResourceMark rm(THREAD);
204 Exceptions::fthrow(
205 THREAD_AND_LOCATION,
206 vmSymbols::java_lang_IllegalAccessError(),
207 "tried to access class %s from class %s",
208 sel_klass->external_name(),
209 ref_klass->external_name()
210 );
211 return;
212 }
213 }
214
215 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
216 Klass* result_oop = pool->klass_ref_at(index, CHECK);
217 result = KlassHandle(THREAD, result_oop);
218 }
219
220 //------------------------------------------------------------------------------------------------------------------------
221 // Method resolution
222 //
223 // According to JVM spec. $5.4.3c & $5.4.3d
224
225 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
226 Method* result_oop = klass->uncached_lookup_method(name, signature);
227 if (EnableInvokeDynamic && result_oop != NULL) {
228 vmIntrinsics::ID iid = result_oop->intrinsic_id();
229 if (MethodHandles::is_signature_polymorphic(iid)) {
230 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
231 return;
232 }
233 }
234 result = methodHandle(THREAD, result_oop);
235 }
236
237 // returns first instance method
238 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
239 Method* result_oop = klass->uncached_lookup_method(name, signature);
240 result = methodHandle(THREAD, result_oop);
241 while (!result.is_null() && result->is_static()) {
242 klass = KlassHandle(THREAD, result->method_holder()->super());
243 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));
244 }
245 }
246
247
248 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
249 ResourceMark rm(THREAD);
250 klassVtable *vt = InstanceKlass::cast(klass())->vtable();
251 return vt->index_of_miranda(name, signature);
252 }
253
254 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
255 InstanceKlass *ik = InstanceKlass::cast(klass());
256 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));
257 }
258
259 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
260 KlassHandle klass, Symbol* name, Symbol* full_signature,
261 KlassHandle current_klass,
262 Handle *appendix_result_or_null,
263 Handle *method_type_result,
264 TRAPS) {
265 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
266 if (TraceMethodHandles) {
267 ResourceMark rm(THREAD);
268 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
269 vmIntrinsics::name_at(iid), klass->external_name(),
270 name->as_C_string(), full_signature->as_C_string());
271 }
272 if (EnableInvokeDynamic &&
273 klass() == SystemDictionary::MethodHandle_klass() &&
274 iid != vmIntrinsics::_none) {
275 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
276 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
277 // Do not erase last argument type (MemberName) if it is a static linkTo method.
278 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
279 TempNewSymbol basic_signature =
280 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
281 if (TraceMethodHandles) {
282 ResourceMark rm(THREAD);
283 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
284 name->as_C_string(),
285 full_signature->as_C_string(),
286 basic_signature->as_C_string());
287 }
288 result = SystemDictionary::find_method_handle_intrinsic(iid,
289 basic_signature,
290 CHECK);
291 if (result.not_null()) {
292 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
293 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
294 assert(basic_signature == result->signature(), "predict the result signature");
295 if (TraceMethodHandles) {
296 tty->print("lookup_polymorphic_method => intrinsic ");
297 result->print_on(tty);
298 }
299 return;
300 }
301 } else if (iid == vmIntrinsics::_invokeGeneric
302 && !THREAD->is_Compiler_thread()
303 && appendix_result_or_null != NULL) {
304 // This is a method with type-checking semantics.
305 // We will ask Java code to spin an adapter method for it.
306 if (!MethodHandles::enabled()) {
307 // Make sure the Java part of the runtime has been booted up.
308 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
309 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
310 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
311 Handle(),
312 Handle(),
313 true,
314 CHECK);
315 }
316 }
317
318 Handle appendix;
319 Handle method_type;
320 result = SystemDictionary::find_method_handle_invoker(name,
321 full_signature,
322 current_klass,
323 &appendix,
324 &method_type,
325 CHECK);
326 if (TraceMethodHandles) {
327 tty->print("lookup_polymorphic_method => (via Java) ");
328 result->print_on(tty);
329 tty->print(" lookup_polymorphic_method => appendix = ");
330 if (appendix.is_null()) tty->print_cr("(none)");
331 else appendix->print_on(tty);
332 }
333 if (result.not_null()) {
334 #ifdef ASSERT
335 ResourceMark rm(THREAD);
336
337 TempNewSymbol basic_signature =
338 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
339 int actual_size_of_params = result->size_of_parameters();
340 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
341 // +1 for MethodHandle.this, +1 for trailing MethodType
342 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
343 if (appendix.not_null()) expected_size_of_params += 1;
344 if (actual_size_of_params != expected_size_of_params) {
345 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
346 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
347 result->print();
348 }
349 assert(actual_size_of_params == expected_size_of_params,
350 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
351 #endif //ASSERT
352
353 assert(appendix_result_or_null != NULL, "");
354 (*appendix_result_or_null) = appendix;
355 (*method_type_result) = method_type;
356 return;
357 }
358 }
359 }
360 }
361
362 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
363 KlassHandle resolved_klass,
364 KlassHandle sel_klass,
365 methodHandle sel_method,
366 TRAPS) {
367
368 AccessFlags flags = sel_method->access_flags();
369
370 // Special case: arrays always override "clone". JVMS 2.15.
371 // If the resolved klass is an array class, and the declaring class
372 // is java.lang.Object and the method is "clone", set the flags
373 // to public.
374 //
375 // We'll check for the method name first, as that's most likely
376 // to be false (so we'll short-circuit out of these tests).
377 if (sel_method->name() == vmSymbols::clone_name() &&
378 sel_klass() == SystemDictionary::Object_klass() &&
379 resolved_klass->oop_is_array()) {
380 // We need to change "protected" to "public".
381 assert(flags.is_protected(), "clone not protected?");
382 jint new_flags = flags.as_int();
383 new_flags = new_flags & (~JVM_ACC_PROTECTED);
384 new_flags = new_flags | JVM_ACC_PUBLIC;
385 flags.set_flags(new_flags);
386 }
387 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
388
389 if (!Reflection::verify_field_access(ref_klass(),
390 resolved_klass(),
391 sel_klass(),
392 flags,
393 true)) {
394 ResourceMark rm(THREAD);
395 Exceptions::fthrow(
396 THREAD_AND_LOCATION,
397 vmSymbols::java_lang_IllegalAccessError(),
398 "tried to access method %s.%s%s from class %s",
399 sel_klass->external_name(),
400 sel_method->name()->as_C_string(),
401 sel_method->signature()->as_C_string(),
402 ref_klass->external_name()
403 );
404 return;
405 }
406 }
407
408 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
409 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
410 // This method is used only in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
411 // and is only used under -Xcomp or -XX:CompileTheWorld.
412 // It appears to fail when applied to an invokeinterface call site.
413 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
414
415 // resolve klass
416 if (code == Bytecodes::_invokedynamic) {
417 resolved_klass = SystemDictionary::MethodHandle_klass();
418 Symbol* method_name = vmSymbols::invoke_name();
419 Symbol* method_signature = pool->signature_ref_at(index);
420 KlassHandle current_klass(THREAD, pool->pool_holder());
421 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
422 return;
423 }
424
425 resolve_klass(resolved_klass, pool, index, CHECK);
426
427 Symbol* method_name = pool->name_ref_at(index);
428 Symbol* method_signature = pool->signature_ref_at(index);
429 KlassHandle current_klass(THREAD, pool->pool_holder());
430
431 if (pool->has_preresolution()
432 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
433 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
434 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
435 if (result_oop != NULL) {
436 resolved_method = methodHandle(THREAD, result_oop);
437 return;
438 }
439 }
440
441 if (code == Bytecodes::_invokeinterface) {
442 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
443 } else {
444 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
445 }
446 }
447
448 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
449 Symbol* method_name, Symbol* method_signature,
450 KlassHandle current_klass, bool check_access, TRAPS) {
451
452 Handle nested_exception;
453
454 // 1. lookup method in resolved klass and its super klasses
455 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
456
457 if (resolved_method.is_null()) { // not found in the class hierarchy
458 // 2. lookup method in all the interfaces implemented by the resolved klass
459 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
460
461 if (resolved_method.is_null()) {
462 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
463 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
464 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
465 if (HAS_PENDING_EXCEPTION) {
466 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
467 CLEAR_PENDING_EXCEPTION;
468 }
469 }
470
471 if (resolved_method.is_null()) {
472 // 3. method lookup failed
473 ResourceMark rm(THREAD);
474 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
475 Method::name_and_sig_as_C_string(resolved_klass(),
476 method_name,
477 method_signature),
478 nested_exception);
479 }
480 }
481
482 // 4. check if klass is not interface
483 if (resolved_klass->is_interface() && resolved_method->is_abstract()) {
484 ResourceMark rm(THREAD);
485 char buf[200];
486 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
487 resolved_klass()->external_name());
488 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
489 }
490
491 // 5. check if method is concrete
492 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
493 ResourceMark rm(THREAD);
494 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
495 Method::name_and_sig_as_C_string(resolved_klass(),
496 method_name,
497 method_signature));
498 }
499
500 // 6. access checks, access checking may be turned off when calling from within the VM.
501 if (check_access) {
502 assert(current_klass.not_null() , "current_klass should not be null");
503
504 // check if method can be accessed by the referring class
505 check_method_accessability(current_klass,
506 resolved_klass,
507 KlassHandle(THREAD, resolved_method->method_holder()),
508 resolved_method,
509 CHECK);
510
511 // check loader constraints
512 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
513 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
514 {
515 ResourceMark rm(THREAD);
516 Symbol* failed_type_symbol =
517 SystemDictionary::check_signature_loaders(method_signature, loader,
518 class_loader, true, CHECK);
519 if (failed_type_symbol != NULL) {
520 const char* msg = "loader constraint violation: when resolving method"
521 " \"%s\" the class loader (instance of %s) of the current class, %s,"
522 " and the class loader (instance of %s) for the method's defining class, %s, have"
523 " different Class objects for the type %s used in the signature";
524 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
525 const char* loader1 = SystemDictionary::loader_name(loader());
526 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
527 const char* loader2 = SystemDictionary::loader_name(class_loader());
528 char* target = InstanceKlass::cast(resolved_method->method_holder())
529 ->name()->as_C_string();
530 char* failed_type_name = failed_type_symbol->as_C_string();
531 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
532 strlen(current) + strlen(loader2) + strlen(target) +
533 strlen(failed_type_name) + 1;
534 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
535 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
536 target, failed_type_name);
537 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
538 }
539 }
540 }
541 }
542
543 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
544 KlassHandle resolved_klass,
545 Symbol* method_name,
546 Symbol* method_signature,
547 KlassHandle current_klass,
548 bool check_access, TRAPS) {
549
550 // check if klass is interface
551 if (!resolved_klass->is_interface()) {
552 ResourceMark rm(THREAD);
553 char buf[200];
554 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
555 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
556 }
557
558 // lookup method in this interface or its super, java.lang.Object
559 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
560
561 if (resolved_method.is_null()) {
562 // lookup method in all the super-interfaces
563 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
564 if (resolved_method.is_null()) {
565 // no method found
566 ResourceMark rm(THREAD);
567 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
568 Method::name_and_sig_as_C_string(resolved_klass(),
569 method_name,
570 method_signature));
571 }
572 }
573
574 if (check_access) {
575 HandleMark hm(THREAD);
576 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
577 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
578 {
579 ResourceMark rm(THREAD);
580 Symbol* failed_type_symbol =
581 SystemDictionary::check_signature_loaders(method_signature, loader,
582 class_loader, true, CHECK);
583 if (failed_type_symbol != NULL) {
584 const char* msg = "loader constraint violation: when resolving "
585 "interface method \"%s\" the class loader (instance of %s) of the "
586 "current class, %s, and the class loader (instance of %s) for "
587 "the method's defining class, %s, have different Class objects for the type %s "
588 "used in the signature";
589 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
590 const char* loader1 = SystemDictionary::loader_name(loader());
591 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
592 const char* loader2 = SystemDictionary::loader_name(class_loader());
593 char* target = InstanceKlass::cast(resolved_method->method_holder())
594 ->name()->as_C_string();
595 char* failed_type_name = failed_type_symbol->as_C_string();
596 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
597 strlen(current) + strlen(loader2) + strlen(target) +
598 strlen(failed_type_name) + 1;
599 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
600 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
601 target, failed_type_name);
602 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
603 }
604 }
605 }
606 }
607
608 //------------------------------------------------------------------------------------------------------------------------
609 // Field resolution
610
611 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
612 KlassHandle resolved_klass,
613 KlassHandle sel_klass,
614 fieldDescriptor& fd,
615 TRAPS) {
616 if (!Reflection::verify_field_access(ref_klass(),
617 resolved_klass(),
618 sel_klass(),
619 fd.access_flags(),
620 true)) {
621 ResourceMark rm(THREAD);
622 Exceptions::fthrow(
623 THREAD_AND_LOCATION,
624 vmSymbols::java_lang_IllegalAccessError(),
625 "tried to access field %s.%s from class %s",
626 sel_klass->external_name(),
627 fd.name()->as_C_string(),
628 ref_klass->external_name()
629 );
630 return;
631 }
632 }
633
634 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
635 // Load these early in case the resolve of the containing klass fails
636 Symbol* field = pool->name_ref_at(index);
637 Symbol* sig = pool->signature_ref_at(index);
638
639 // resolve specified klass
640 KlassHandle resolved_klass;
641 resolve_klass(resolved_klass, pool, index, CHECK);
642
643 KlassHandle current_klass(THREAD, pool->pool_holder());
644 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
645 }
646
647 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
648 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
649 TRAPS) {
650 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
651 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
652 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
653
654 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
655 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
656
657 // Check if there's a resolved klass containing the field
658 if (resolved_klass.is_null()) {
659 ResourceMark rm(THREAD);
660 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
661 }
662
663 // Resolve instance field
664 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
665 // check if field exists; i.e., if a klass containing the field def has been selected
666 if (sel_klass.is_null()) {
667 ResourceMark rm(THREAD);
668 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
669 }
670
671 if (!check_access)
672 // Access checking may be turned off when calling from within the VM.
673 return;
674
675 // check access
676 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
677
678 // check for errors
679 if (is_static != fd.is_static()) {
680 ResourceMark rm(THREAD);
681 char msg[200];
682 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
683 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
684 }
685
686 // Final fields can only be accessed from its own class.
687 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
688 THROW(vmSymbols::java_lang_IllegalAccessError());
689 }
690
691 // initialize resolved_klass if necessary
692 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
693 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
694 //
695 // note 2: we don't want to force initialization if we are just checking
696 // if the field access is legal; e.g., during compilation
697 if (is_static && initialize_class) {
698 sel_klass->initialize(CHECK);
699 }
700
701 if (sel_klass() != current_klass()) {
702 HandleMark hm(THREAD);
703 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
704 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
705 {
706 ResourceMark rm(THREAD);
707 Symbol* failed_type_symbol =
708 SystemDictionary::check_signature_loaders(sig,
709 ref_loader, sel_loader,
710 false,
711 CHECK);
712 if (failed_type_symbol != NULL) {
713 const char* msg = "loader constraint violation: when resolving field"
714 " \"%s\" the class loader (instance of %s) of the referring class, "
715 "%s, and the class loader (instance of %s) for the field's resolved "
716 "type, %s, have different Class objects for that type";
717 char* field_name = field->as_C_string();
718 const char* loader1 = SystemDictionary::loader_name(ref_loader());
719 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
720 const char* loader2 = SystemDictionary::loader_name(sel_loader());
721 char* failed_type_name = failed_type_symbol->as_C_string();
722 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
723 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
724 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
725 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
726 failed_type_name);
727 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
728 }
729 }
730 }
731
732 // return information. note that the klass is set to the actual klass containing the
733 // field, otherwise access of static fields in superclasses will not work.
734 }
735
736
737 //------------------------------------------------------------------------------------------------------------------------
738 // Invoke resolution
739 //
740 // Naming conventions:
741 //
742 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
743 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
744 // resolved_klass the specified klass (i.e., specified via constant pool index)
745 // recv_klass the receiver klass
746
747
748 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
749 Symbol* method_signature, KlassHandle current_klass,
750 bool check_access, bool initialize_class, TRAPS) {
751 methodHandle resolved_method;
752 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
753 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
754
755 // Initialize klass (this should only happen if everything is ok)
756 if (initialize_class && resolved_klass->should_be_initialized()) {
757 resolved_klass->initialize(CHECK);
758 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
759 }
760
761 // setup result
762 result.set_static(resolved_klass, resolved_method, CHECK);
763 }
764
765 // throws linktime exceptions
766 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
767 Symbol* method_name, Symbol* method_signature,
768 KlassHandle current_klass, bool check_access, TRAPS) {
769
770 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
771 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
772
773 // check if static
774 if (!resolved_method->is_static()) {
775 ResourceMark rm(THREAD);
776 char buf[200];
777 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
778 resolved_method->name(),
779 resolved_method->signature()));
780 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
781 }
782 }
783
784
785 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
786 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
787 methodHandle resolved_method;
788 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
789 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
790 }
791
792 // throws linktime exceptions
793 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
794 Symbol* method_name, Symbol* method_signature,
795 KlassHandle current_klass, bool check_access, TRAPS) {
796
797 if (resolved_klass->is_interface() && current_klass() != NULL) {
798 // If the target class is a direct interface, treat this as a "super"
799 // default call.
800 //
801 // If the current method is an overpass that happens to call a direct
802 // super-interface's method, then we'll end up rerunning the default method
803 // analysis even though we don't need to, but that's ok since it will end
804 // up with the same answer.
805 InstanceKlass* ik = InstanceKlass::cast(current_klass());
806 Array<Klass*>* interfaces = ik->local_interfaces();
807 int num_interfaces = interfaces->length();
808 for (int index = 0; index < num_interfaces; index++) {
809 if (interfaces->at(index) == resolved_klass()) {
810 Method* method = DefaultMethods::find_super_default(current_klass(),
811 resolved_klass(), method_name, method_signature, CHECK);
812 resolved_method = methodHandle(THREAD, method);
813 return;
814 }
815 }
816 }
817
818 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
819
820 // check if method name is <init>, that it is found in same klass as static type
821 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
822 resolved_method->method_holder() != resolved_klass()) {
823 ResourceMark rm(THREAD);
824 Exceptions::fthrow(
825 THREAD_AND_LOCATION,
826 vmSymbols::java_lang_NoSuchMethodError(),
827 "%s: method %s%s not found",
828 resolved_klass->external_name(),
829 resolved_method->name()->as_C_string(),
830 resolved_method->signature()->as_C_string()
831 );
832 return;
833 }
834
835 // check if not static
836 if (resolved_method->is_static()) {
837 ResourceMark rm(THREAD);
838 char buf[200];
839 jio_snprintf(buf, sizeof(buf),
840 "Expecting non-static method %s",
841 Method::name_and_sig_as_C_string(resolved_klass(),
842 resolved_method->name(),
843 resolved_method->signature()));
844 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
845 }
846 }
847
848 // throws runtime exceptions
849 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
850 KlassHandle current_klass, bool check_access, TRAPS) {
851
852 // resolved method is selected method unless we have an old-style lookup
853 methodHandle sel_method(THREAD, resolved_method());
854
855 // check if this is an old-style super call and do a new lookup if so
856 { KlassHandle method_klass = KlassHandle(THREAD,
857 resolved_method->method_holder());
858
859 const bool direct_calling_default_method =
860 resolved_klass() != NULL && resolved_method() != NULL &&
861 resolved_klass->is_interface() && !resolved_method->is_abstract();
862
863 if (!direct_calling_default_method &&
864 check_access &&
865 // a) check if ACC_SUPER flag is set for the current class
866 (current_klass->is_super() || !AllowNonVirtualCalls) &&
867 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
868 current_klass->is_subtype_of(method_klass()) &&
869 current_klass() != method_klass() &&
870 // c) check if the method is not <init>
871 resolved_method->name() != vmSymbols::object_initializer_name()) {
872 // Lookup super method
873 KlassHandle super_klass(THREAD, current_klass->super());
874 lookup_instance_method_in_klasses(sel_method, super_klass,
875 resolved_method->name(),
876 resolved_method->signature(), CHECK);
877 // check if found
878 if (sel_method.is_null()) {
879 ResourceMark rm(THREAD);
880 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
881 Method::name_and_sig_as_C_string(resolved_klass(),
882 resolved_method->name(),
883 resolved_method->signature()));
884 }
885 }
886 }
887
888 // check if not static
889 if (sel_method->is_static()) {
890 ResourceMark rm(THREAD);
891 char buf[200];
892 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
893 resolved_method->name(),
894 resolved_method->signature()));
895 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
896 }
897
898 // check if abstract
899 if (sel_method->is_abstract()) {
900 ResourceMark rm(THREAD);
901 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
902 Method::name_and_sig_as_C_string(resolved_klass(),
903 sel_method->name(),
904 sel_method->signature()));
905 }
906
907 // setup result
908 result.set_static(resolved_klass, sel_method, CHECK);
909 }
910
911 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
912 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
913 bool check_access, bool check_null_and_abstract, TRAPS) {
914 methodHandle resolved_method;
915 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
916 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
917 }
918
919 // throws linktime exceptions
920 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
921 Symbol* method_name, Symbol* method_signature,
922 KlassHandle current_klass, bool check_access, TRAPS) {
923 // normal method resolution
924 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
925
926 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
927 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
928
929 // check if not static
930 if (resolved_method->is_static()) {
931 ResourceMark rm(THREAD);
932 char buf[200];
933 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
934 resolved_method->name(),
935 resolved_method->signature()));
936 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
937 }
938 }
939
940 // throws runtime exceptions
941 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
942 methodHandle resolved_method,
943 KlassHandle resolved_klass,
944 Handle recv,
945 KlassHandle recv_klass,
946 bool check_null_and_abstract,
947 TRAPS) {
948
949 // setup default return values
950 int vtable_index = Method::invalid_vtable_index;
951 methodHandle selected_method;
952
953 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
954
955 // runtime method resolution
956 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
957 THROW(vmSymbols::java_lang_NullPointerException());
958 }
959
960 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
961 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
962 // a missing receiver might result in a bogus lookup.
963 assert(resolved_method->method_holder()->is_linked(), "must be linked");
964
965 // do lookup based on receiver klass using the vtable index
966 if (resolved_method->method_holder()->is_interface()) { // miranda method
967 vtable_index = vtable_index_of_miranda_method(resolved_klass,
968 resolved_method->name(),
969 resolved_method->signature(), CHECK);
970
971 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
972
973 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
974 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
975 } else {
976 // at this point we are sure that resolved_method is virtual and not
977 // a miranda method; therefore, it must have a valid vtable index.
978 assert(!resolved_method->has_itable_index(), "");
979 vtable_index = resolved_method->vtable_index();
980 // We could get a negative vtable_index for final methods,
981 // because as an optimization they are they are never put in the vtable,
982 // unless they override an existing method.
983 // If we do get a negative, it means the resolved method is the the selected
984 // method, and it can never be changed by an override.
985 if (vtable_index == Method::nonvirtual_vtable_index) {
986 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
987 selected_method = resolved_method;
988 } else {
989 // recv_klass might be an arrayKlassOop but all vtables start at
990 // the same place. The cast is to avoid virtual call and assertion.
991 InstanceKlass* inst = (InstanceKlass*)recv_klass();
992 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
993 }
994 }
995 if (selected_method.is_null() && !check_null_and_abstract) {
996 selected_method = resolved_method; // use a non-null placeholder
997 }
998
999 // check if method exists
1000 if (selected_method.is_null()) {
1001 ResourceMark rm(THREAD);
1002 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1003 Method::name_and_sig_as_C_string(resolved_klass(),
1004 resolved_method->name(),
1005 resolved_method->signature()));
1006 }
1007
1008 // check if abstract
1009 if (check_null_and_abstract && selected_method->is_abstract()) {
1010 ResourceMark rm(THREAD);
1011 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1012 Method::name_and_sig_as_C_string(resolved_klass(),
1013 selected_method->name(),
1014 selected_method->signature()));
1015 }
1016
1017 // setup result
1018 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1019 }
1020
1021 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
1022 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1023 bool check_access, bool check_null_and_abstract, TRAPS) {
1024 methodHandle resolved_method;
1025 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1026 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
1027 }
1028
1029 // throws linktime exceptions
1030 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
1031 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
1032 // normal interface method resolution
1033 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1034
1035 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1036 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1037 }
1038
1039 // throws runtime exceptions
1040 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1041 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
1042 // check if receiver exists
1043 if (check_null_and_abstract && recv.is_null()) {
1044 THROW(vmSymbols::java_lang_NullPointerException());
1045 }
1046
1047 // check if receiver klass implements the resolved interface
1048 if (!recv_klass->is_subtype_of(resolved_klass())) {
1049 ResourceMark rm(THREAD);
1050 char buf[200];
1051 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1052 recv_klass()->external_name(),
1053 resolved_klass()->external_name());
1054 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1055 }
1056 // do lookup based on receiver klass
1057 methodHandle sel_method;
1058 lookup_instance_method_in_klasses(sel_method, recv_klass,
1059 resolved_method->name(),
1060 resolved_method->signature(), CHECK);
1061 if (sel_method.is_null() && !check_null_and_abstract) {
1062 sel_method = resolved_method; // use a non-null placeholder
1063 }
1064 // check if method exists
1065 if (sel_method.is_null()) {
1066 ResourceMark rm(THREAD);
1067 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1068 Method::name_and_sig_as_C_string(recv_klass(),
1069 resolved_method->name(),
1070 resolved_method->signature()));
1071 }
1072 // check access
1073 if (sel_method->method_holder()->is_interface()) {
1074 // Method holder is an interface. Throw Illegal Access Error if sel_method
1075 // is neither public nor private.
1076 if (!(sel_method->is_public() || sel_method->is_private())) {
1077 ResourceMark rm(THREAD);
1078 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1079 Method::name_and_sig_as_C_string(recv_klass(),
1080 sel_method->name(),
1081 sel_method->signature()));
1082 }
1083 }
1084 else {
1085 // Method holder is a class. Throw Illegal Access Error if sel_method
1086 // is not public.
1087 if (!sel_method->is_public()) {
1088 ResourceMark rm(THREAD);
1089 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1090 Method::name_and_sig_as_C_string(recv_klass(),
1091 sel_method->name(),
1092 sel_method->signature()));
1093 }
1094 }
1095 // check if abstract
1096 if (check_null_and_abstract && sel_method->is_abstract()) {
1097 ResourceMark rm(THREAD);
1098 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1099 Method::name_and_sig_as_C_string(recv_klass(),
1100 sel_method->name(),
1101 sel_method->signature()));
1102 }
1103 // setup result
1104 if (!resolved_method->has_itable_index()) {
1105 int vtable_index = resolved_method->vtable_index();
1106 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1107 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1108 return;
1109 }
1110 int itable_index = resolved_method()->itable_index();
1111 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1112 }
1113
1114
1115 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1116 KlassHandle resolved_klass,
1117 Symbol* method_name,
1118 Symbol* method_signature,
1119 KlassHandle current_klass,
1120 bool check_access) {
1121 EXCEPTION_MARK;
1122 methodHandle method_result;
1123 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1124 if (HAS_PENDING_EXCEPTION) {
1125 CLEAR_PENDING_EXCEPTION;
1126 return methodHandle();
1127 } else {
1128 return method_result;
1129 }
1130 }
1131
1132 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1133 KlassHandle resolved_klass,
1134 Symbol* method_name,
1135 Symbol* method_signature,
1136 KlassHandle current_klass,
1137 bool check_access) {
1138 EXCEPTION_MARK;
1139 methodHandle method_result;
1140 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1141 if (HAS_PENDING_EXCEPTION) {
1142 CLEAR_PENDING_EXCEPTION;
1143 return methodHandle();
1144 } else {
1145 return method_result;
1146 }
1147 }
1148
1149 methodHandle LinkResolver::resolve_virtual_call_or_null(
1150 KlassHandle receiver_klass,
1151 KlassHandle resolved_klass,
1152 Symbol* name,
1153 Symbol* signature,
1154 KlassHandle current_klass) {
1155 EXCEPTION_MARK;
1156 CallInfo info;
1157 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1158 if (HAS_PENDING_EXCEPTION) {
1159 CLEAR_PENDING_EXCEPTION;
1160 return methodHandle();
1161 }
1162 return info.selected_method();
1163 }
1164
1165 methodHandle LinkResolver::resolve_interface_call_or_null(
1166 KlassHandle receiver_klass,
1167 KlassHandle resolved_klass,
1168 Symbol* name,
1169 Symbol* signature,
1170 KlassHandle current_klass) {
1171 EXCEPTION_MARK;
1172 CallInfo info;
1173 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1174 if (HAS_PENDING_EXCEPTION) {
1175 CLEAR_PENDING_EXCEPTION;
1176 return methodHandle();
1177 }
1178 return info.selected_method();
1179 }
1180
1181 int LinkResolver::resolve_virtual_vtable_index(
1182 KlassHandle receiver_klass,
1183 KlassHandle resolved_klass,
1184 Symbol* name,
1185 Symbol* signature,
1186 KlassHandle current_klass) {
1187 EXCEPTION_MARK;
1188 CallInfo info;
1189 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1190 if (HAS_PENDING_EXCEPTION) {
1191 CLEAR_PENDING_EXCEPTION;
1192 return Method::invalid_vtable_index;
1193 }
1194 return info.vtable_index();
1195 }
1196
1197 methodHandle LinkResolver::resolve_static_call_or_null(
1198 KlassHandle resolved_klass,
1199 Symbol* name,
1200 Symbol* signature,
1201 KlassHandle current_klass) {
1202 EXCEPTION_MARK;
1203 CallInfo info;
1204 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1205 if (HAS_PENDING_EXCEPTION) {
1206 CLEAR_PENDING_EXCEPTION;
1207 return methodHandle();
1208 }
1209 return info.selected_method();
1210 }
1211
1212 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1213 KlassHandle current_klass) {
1214 EXCEPTION_MARK;
1215 CallInfo info;
1216 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1217 if (HAS_PENDING_EXCEPTION) {
1218 CLEAR_PENDING_EXCEPTION;
1219 return methodHandle();
1220 }
1221 return info.selected_method();
1222 }
1223
1224
1225
1226 //------------------------------------------------------------------------------------------------------------------------
1227 // ConstantPool entries
1228
1229 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1230 switch (byte) {
1231 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1232 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1233 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1234 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1235 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1236 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1237 }
1238 return;
1239 }
1240
1241 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1242 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1243 // resolve klass
1244 resolve_klass(resolved_klass, pool, index, CHECK);
1245
1246 // Get name, signature, and static klass
1247 method_name = pool->name_ref_at(index);
1248 method_signature = pool->signature_ref_at(index);
1249 current_klass = KlassHandle(THREAD, pool->pool_holder());
1250 }
1251
1252
1253 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1254 KlassHandle resolved_klass;
1255 Symbol* method_name = NULL;
1256 Symbol* method_signature = NULL;
1257 KlassHandle current_klass;
1258 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1259 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1260 }
1261
1262
1263 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1264 KlassHandle resolved_klass;
1265 Symbol* method_name = NULL;
1266 Symbol* method_signature = NULL;
1267 KlassHandle current_klass;
1268 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1269 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1270 }
1271
1272
1273 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1274 constantPoolHandle pool, int index,
1275 TRAPS) {
1276
1277 KlassHandle resolved_klass;
1278 Symbol* method_name = NULL;
1279 Symbol* method_signature = NULL;
1280 KlassHandle current_klass;
1281 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1282 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1283 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1284 }
1285
1286
1287 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1288 KlassHandle resolved_klass;
1289 Symbol* method_name = NULL;
1290 Symbol* method_signature = NULL;
1291 KlassHandle current_klass;
1292 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1293 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1294 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1295 }
1296
1297
1298 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1299 assert(EnableInvokeDynamic, "");
1300 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1301 KlassHandle resolved_klass;
1302 Symbol* method_name = NULL;
1303 Symbol* method_signature = NULL;
1304 KlassHandle current_klass;
1305 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1306 if (TraceMethodHandles) {
1307 ResourceMark rm(THREAD);
1308 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1309 }
1310 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1311 }
1312
1313 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1314 Symbol* method_name, Symbol* method_signature,
1315 KlassHandle current_klass,
1316 TRAPS) {
1317 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1318 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1319 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1320 methodHandle resolved_method;
1321 Handle resolved_appendix;
1322 Handle resolved_method_type;
1323 lookup_polymorphic_method(resolved_method, resolved_klass,
1324 method_name, method_signature,
1325 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1326 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1327 }
1328
1329
1330 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1331 assert(EnableInvokeDynamic, "");
1332
1333 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1334 Symbol* method_name = pool->name_ref_at(index);
1335 Symbol* method_signature = pool->signature_ref_at(index);
1336 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1337
1338 // Resolve the bootstrap specifier (BSM + optional arguments).
1339 Handle bootstrap_specifier;
1340 // Check if CallSite has been bound already:
1341 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1342 if (cpce->is_f1_null()) {
1343 int pool_index = cpce->constant_pool_index();
1344 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1345 assert(bsm_info != NULL, "");
1346 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1347 bootstrap_specifier = Handle(THREAD, bsm_info);
1348 }
1349 if (!cpce->is_f1_null()) {
1350 methodHandle method( THREAD, cpce->f1_as_method());
1351 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1352 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1353 result.set_handle(method, appendix, method_type, CHECK);
1354 return;
1355 }
1356
1357 if (TraceMethodHandles) {
1358 tty->print_cr("resolve_invokedynamic #%d %s %s",
1359 ConstantPool::decode_invokedynamic_index(index),
1360 method_name->as_C_string(), method_signature->as_C_string());
1361 tty->print(" BSM info: "); bootstrap_specifier->print();
1362 }
1363
1364 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1365 }
1366
1367 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1368 Handle bootstrap_specifier,
1369 Symbol* method_name, Symbol* method_signature,
1370 KlassHandle current_klass,
1371 TRAPS) {
1372 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1373 // The appendix argument is likely to be a freshly-created CallSite.
1374 Handle resolved_appendix;
1375 Handle resolved_method_type;
1376 methodHandle resolved_method =
1377 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1378 bootstrap_specifier,
1379 method_name, method_signature,
1380 &resolved_appendix,
1381 &resolved_method_type,
1382 THREAD);
1383 if (HAS_PENDING_EXCEPTION) {
1384 if (TraceMethodHandles) {
1385 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION);
1386 PENDING_EXCEPTION->print();
1387 }
1388 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1389 // throw these guys, since they are already wrapped
1390 return;
1391 }
1392 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1393 // intercept only LinkageErrors which might have failed to wrap
1394 return;
1395 }
1396 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1397 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1398 CLEAR_PENDING_EXCEPTION;
1399 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1400 }
1401 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1402 }
1403
1404 //------------------------------------------------------------------------------------------------------------------------
1405 #ifndef PRODUCT
1406
1407 void CallInfo::print() {
1408 ResourceMark rm;
1409 const char* kindstr = "unknown";
1410 switch (_call_kind) {
1411 case direct_call: kindstr = "direct"; break;
1412 case vtable_call: kindstr = "vtable"; break;
1413 case itable_call: kindstr = "itable"; break;
1414 }
1415 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
1416 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
1417 }
1418
1419 #endif