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src/share/vm/interpreter/linkResolver.cpp@190899198332
src/share/vm/interpreter/linkResolver.cpp
Thu, 26 Sep 2013 10:25:02 -0400
- author
- hseigel
- date
- Thu, 26 Sep 2013 10:25:02 -0400
- changeset 5784
- 190899198332
- parent 5732
- b2e698d2276c
- child 5786
- 36b97be47bde
- permissions
- -rw-r--r--
7195622: CheckUnhandledOops has limited usefulness now
Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com
1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/defaultMethods.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "gc_interface/collectedHeap.inline.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "prims/nativeLookup.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/fieldDescriptor.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/reflection.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/thread.inline.hpp"
47 #include "runtime/vmThread.hpp"
50 //------------------------------------------------------------------------------------------------------------------------
51 // Implementation of CallInfo
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 }
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 }
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 }
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 }
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
110 if (CompilationPolicy::must_be_compiled(selected_method)) {
111 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
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 }
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 }
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
196 //------------------------------------------------------------------------------------------------------------------------
197 // Klass resolution
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 }
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 }
220 //------------------------------------------------------------------------------------------------------------------------
221 // Method resolution
222 //
223 // According to JVM spec. $5.4.3c & $5.4.3d
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 }
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 }
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 }
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 }
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 }
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);
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
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 }
362 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
363 KlassHandle resolved_klass,
364 KlassHandle sel_klass,
365 methodHandle sel_method,
366 TRAPS) {
368 AccessFlags flags = sel_method->access_flags();
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");
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 }
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
411 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
412 // and
413 // (2) in Bytecode_invoke::static_target
414 // It appears to fail when applied to an invokeinterface call site.
415 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
416 // resolve klass
417 if (code == Bytecodes::_invokedynamic) {
418 resolved_klass = SystemDictionary::MethodHandle_klass();
419 Symbol* method_name = vmSymbols::invoke_name();
420 Symbol* method_signature = pool->signature_ref_at(index);
421 KlassHandle current_klass(THREAD, pool->pool_holder());
422 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
423 return;
424 }
426 resolve_klass(resolved_klass, pool, index, CHECK);
428 Symbol* method_name = pool->name_ref_at(index);
429 Symbol* method_signature = pool->signature_ref_at(index);
430 KlassHandle current_klass(THREAD, pool->pool_holder());
432 if (pool->has_preresolution()
433 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
434 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
435 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
436 if (result_oop != NULL) {
437 resolved_method = methodHandle(THREAD, result_oop);
438 return;
439 }
440 }
442 if (code == Bytecodes::_invokeinterface) {
443 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
444 } else {
445 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
446 }
447 }
449 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
450 Symbol* method_name, Symbol* method_signature,
451 KlassHandle current_klass, bool check_access, TRAPS) {
453 Handle nested_exception;
455 // 1. lookup method in resolved klass and its super klasses
456 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
458 if (resolved_method.is_null()) { // not found in the class hierarchy
459 // 2. lookup method in all the interfaces implemented by the resolved klass
460 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
462 if (resolved_method.is_null()) {
463 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
464 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
465 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
466 if (HAS_PENDING_EXCEPTION) {
467 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
468 CLEAR_PENDING_EXCEPTION;
469 }
470 }
472 if (resolved_method.is_null()) {
473 // 3. method lookup failed
474 ResourceMark rm(THREAD);
475 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
476 Method::name_and_sig_as_C_string(resolved_klass(),
477 method_name,
478 method_signature),
479 nested_exception);
480 }
481 }
483 // 4. check if klass is not interface
484 if (resolved_klass->is_interface() && resolved_method->is_abstract()) {
485 ResourceMark rm(THREAD);
486 char buf[200];
487 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
488 resolved_klass()->external_name());
489 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
490 }
492 // 5. check if method is concrete
493 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
494 ResourceMark rm(THREAD);
495 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
496 Method::name_and_sig_as_C_string(resolved_klass(),
497 method_name,
498 method_signature));
499 }
501 // 6. access checks, access checking may be turned off when calling from within the VM.
502 if (check_access) {
503 assert(current_klass.not_null() , "current_klass should not be null");
505 // check if method can be accessed by the referring class
506 check_method_accessability(current_klass,
507 resolved_klass,
508 KlassHandle(THREAD, resolved_method->method_holder()),
509 resolved_method,
510 CHECK);
512 // check loader constraints
513 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
514 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
515 {
516 ResourceMark rm(THREAD);
517 Symbol* failed_type_symbol =
518 SystemDictionary::check_signature_loaders(method_signature, loader,
519 class_loader, true, CHECK);
520 if (failed_type_symbol != NULL) {
521 const char* msg = "loader constraint violation: when resolving method"
522 " \"%s\" the class loader (instance of %s) of the current class, %s,"
523 " and the class loader (instance of %s) for the method's defining class, %s, have"
524 " different Class objects for the type %s used in the signature";
525 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
526 const char* loader1 = SystemDictionary::loader_name(loader());
527 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
528 const char* loader2 = SystemDictionary::loader_name(class_loader());
529 char* target = InstanceKlass::cast(resolved_method->method_holder())
530 ->name()->as_C_string();
531 char* failed_type_name = failed_type_symbol->as_C_string();
532 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
533 strlen(current) + strlen(loader2) + strlen(target) +
534 strlen(failed_type_name) + 1;
535 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
536 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
537 target, failed_type_name);
538 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
539 }
540 }
541 }
542 }
544 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
545 KlassHandle resolved_klass,
546 Symbol* method_name,
547 Symbol* method_signature,
548 KlassHandle current_klass,
549 bool check_access, TRAPS) {
551 // check if klass is interface
552 if (!resolved_klass->is_interface()) {
553 ResourceMark rm(THREAD);
554 char buf[200];
555 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
556 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
557 }
559 // lookup method in this interface or its super, java.lang.Object
560 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
562 if (resolved_method.is_null()) {
563 // lookup method in all the super-interfaces
564 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
565 if (resolved_method.is_null()) {
566 // no method found
567 ResourceMark rm(THREAD);
568 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
569 Method::name_and_sig_as_C_string(resolved_klass(),
570 method_name,
571 method_signature));
572 }
573 }
575 if (check_access) {
576 HandleMark hm(THREAD);
577 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
578 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
579 {
580 ResourceMark rm(THREAD);
581 Symbol* failed_type_symbol =
582 SystemDictionary::check_signature_loaders(method_signature, loader,
583 class_loader, true, CHECK);
584 if (failed_type_symbol != NULL) {
585 const char* msg = "loader constraint violation: when resolving "
586 "interface method \"%s\" the class loader (instance of %s) of the "
587 "current class, %s, and the class loader (instance of %s) for "
588 "the method's defining class, %s, have different Class objects for the type %s "
589 "used in the signature";
590 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
591 const char* loader1 = SystemDictionary::loader_name(loader());
592 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
593 const char* loader2 = SystemDictionary::loader_name(class_loader());
594 char* target = InstanceKlass::cast(resolved_method->method_holder())
595 ->name()->as_C_string();
596 char* failed_type_name = failed_type_symbol->as_C_string();
597 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
598 strlen(current) + strlen(loader2) + strlen(target) +
599 strlen(failed_type_name) + 1;
600 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
601 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
602 target, failed_type_name);
603 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
604 }
605 }
606 }
607 }
609 //------------------------------------------------------------------------------------------------------------------------
610 // Field resolution
612 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
613 KlassHandle resolved_klass,
614 KlassHandle sel_klass,
615 fieldDescriptor& fd,
616 TRAPS) {
617 if (!Reflection::verify_field_access(ref_klass(),
618 resolved_klass(),
619 sel_klass(),
620 fd.access_flags(),
621 true)) {
622 ResourceMark rm(THREAD);
623 Exceptions::fthrow(
624 THREAD_AND_LOCATION,
625 vmSymbols::java_lang_IllegalAccessError(),
626 "tried to access field %s.%s from class %s",
627 sel_klass->external_name(),
628 fd.name()->as_C_string(),
629 ref_klass->external_name()
630 );
631 return;
632 }
633 }
635 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
636 // Load these early in case the resolve of the containing klass fails
637 Symbol* field = pool->name_ref_at(index);
638 Symbol* sig = pool->signature_ref_at(index);
640 // resolve specified klass
641 KlassHandle resolved_klass;
642 resolve_klass(resolved_klass, pool, index, CHECK);
644 KlassHandle current_klass(THREAD, pool->pool_holder());
645 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
646 }
648 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
649 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
650 TRAPS) {
651 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
652 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
653 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
655 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
656 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
658 // Check if there's a resolved klass containing the field
659 if (resolved_klass.is_null()) {
660 ResourceMark rm(THREAD);
661 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
662 }
664 // Resolve instance field
665 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
666 // check if field exists; i.e., if a klass containing the field def has been selected
667 if (sel_klass.is_null()) {
668 ResourceMark rm(THREAD);
669 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
670 }
672 if (!check_access)
673 // Access checking may be turned off when calling from within the VM.
674 return;
676 // check access
677 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
679 // check for errors
680 if (is_static != fd.is_static()) {
681 ResourceMark rm(THREAD);
682 char msg[200];
683 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
684 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
685 }
687 // Final fields can only be accessed from its own class.
688 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
689 THROW(vmSymbols::java_lang_IllegalAccessError());
690 }
692 // initialize resolved_klass if necessary
693 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
694 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
695 //
696 // note 2: we don't want to force initialization if we are just checking
697 // if the field access is legal; e.g., during compilation
698 if (is_static && initialize_class) {
699 sel_klass->initialize(CHECK);
700 }
702 if (sel_klass() != current_klass()) {
703 HandleMark hm(THREAD);
704 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
705 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
706 {
707 ResourceMark rm(THREAD);
708 Symbol* failed_type_symbol =
709 SystemDictionary::check_signature_loaders(sig,
710 ref_loader, sel_loader,
711 false,
712 CHECK);
713 if (failed_type_symbol != NULL) {
714 const char* msg = "loader constraint violation: when resolving field"
715 " \"%s\" the class loader (instance of %s) of the referring class, "
716 "%s, and the class loader (instance of %s) for the field's resolved "
717 "type, %s, have different Class objects for that type";
718 char* field_name = field->as_C_string();
719 const char* loader1 = SystemDictionary::loader_name(ref_loader());
720 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
721 const char* loader2 = SystemDictionary::loader_name(sel_loader());
722 char* failed_type_name = failed_type_symbol->as_C_string();
723 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
724 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
725 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
726 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
727 failed_type_name);
728 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
729 }
730 }
731 }
733 // return information. note that the klass is set to the actual klass containing the
734 // field, otherwise access of static fields in superclasses will not work.
735 }
738 //------------------------------------------------------------------------------------------------------------------------
739 // Invoke resolution
740 //
741 // Naming conventions:
742 //
743 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
744 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
745 // resolved_klass the specified klass (i.e., specified via constant pool index)
746 // recv_klass the receiver klass
749 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
750 Symbol* method_signature, KlassHandle current_klass,
751 bool check_access, bool initialize_class, TRAPS) {
752 methodHandle resolved_method;
753 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
754 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
756 // Initialize klass (this should only happen if everything is ok)
757 if (initialize_class && resolved_klass->should_be_initialized()) {
758 resolved_klass->initialize(CHECK);
759 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
760 }
762 // setup result
763 result.set_static(resolved_klass, resolved_method, CHECK);
764 }
766 // throws linktime exceptions
767 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
768 Symbol* method_name, Symbol* method_signature,
769 KlassHandle current_klass, bool check_access, TRAPS) {
771 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
772 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
774 // check if static
775 if (!resolved_method->is_static()) {
776 ResourceMark rm(THREAD);
777 char buf[200];
778 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
779 resolved_method->name(),
780 resolved_method->signature()));
781 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
782 }
783 }
786 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
787 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
788 methodHandle resolved_method;
789 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
790 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
791 }
793 // throws linktime exceptions
794 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
795 Symbol* method_name, Symbol* method_signature,
796 KlassHandle current_klass, bool check_access, TRAPS) {
798 if (resolved_klass->is_interface() && current_klass() != NULL) {
799 // If the target class is a direct interface, treat this as a "super"
800 // default call.
801 //
802 // If the current method is an overpass that happens to call a direct
803 // super-interface's method, then we'll end up rerunning the default method
804 // analysis even though we don't need to, but that's ok since it will end
805 // up with the same answer.
806 InstanceKlass* ik = InstanceKlass::cast(current_klass());
807 Array<Klass*>* interfaces = ik->local_interfaces();
808 int num_interfaces = interfaces->length();
809 for (int index = 0; index < num_interfaces; index++) {
810 if (interfaces->at(index) == resolved_klass()) {
811 Method* method = DefaultMethods::find_super_default(current_klass(),
812 resolved_klass(), method_name, method_signature, CHECK);
813 resolved_method = methodHandle(THREAD, method);
814 return;
815 }
816 }
817 }
819 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
821 // check if method name is <init>, that it is found in same klass as static type
822 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
823 resolved_method->method_holder() != resolved_klass()) {
824 ResourceMark rm(THREAD);
825 Exceptions::fthrow(
826 THREAD_AND_LOCATION,
827 vmSymbols::java_lang_NoSuchMethodError(),
828 "%s: method %s%s not found",
829 resolved_klass->external_name(),
830 resolved_method->name()->as_C_string(),
831 resolved_method->signature()->as_C_string()
832 );
833 return;
834 }
836 // check if not static
837 if (resolved_method->is_static()) {
838 ResourceMark rm(THREAD);
839 char buf[200];
840 jio_snprintf(buf, sizeof(buf),
841 "Expecting non-static method %s",
842 Method::name_and_sig_as_C_string(resolved_klass(),
843 resolved_method->name(),
844 resolved_method->signature()));
845 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
846 }
847 }
849 // throws runtime exceptions
850 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
851 KlassHandle current_klass, bool check_access, TRAPS) {
853 // resolved method is selected method unless we have an old-style lookup
854 methodHandle sel_method(THREAD, resolved_method());
856 // check if this is an old-style super call and do a new lookup if so
857 { KlassHandle method_klass = KlassHandle(THREAD,
858 resolved_method->method_holder());
860 const bool direct_calling_default_method =
861 resolved_klass() != NULL && resolved_method() != NULL &&
862 resolved_klass->is_interface() && !resolved_method->is_abstract();
864 if (!direct_calling_default_method &&
865 check_access &&
866 // a) check if ACC_SUPER flag is set for the current class
867 (current_klass->is_super() || !AllowNonVirtualCalls) &&
868 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
869 current_klass->is_subtype_of(method_klass()) &&
870 current_klass() != method_klass() &&
871 // c) check if the method is not <init>
872 resolved_method->name() != vmSymbols::object_initializer_name()) {
873 // Lookup super method
874 KlassHandle super_klass(THREAD, current_klass->super());
875 lookup_instance_method_in_klasses(sel_method, super_klass,
876 resolved_method->name(),
877 resolved_method->signature(), CHECK);
878 // check if found
879 if (sel_method.is_null()) {
880 ResourceMark rm(THREAD);
881 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
882 Method::name_and_sig_as_C_string(resolved_klass(),
883 resolved_method->name(),
884 resolved_method->signature()));
885 }
886 }
887 }
889 // check if not static
890 if (sel_method->is_static()) {
891 ResourceMark rm(THREAD);
892 char buf[200];
893 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
894 resolved_method->name(),
895 resolved_method->signature()));
896 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
897 }
899 // check if abstract
900 if (sel_method->is_abstract()) {
901 ResourceMark rm(THREAD);
902 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
903 Method::name_and_sig_as_C_string(resolved_klass(),
904 sel_method->name(),
905 sel_method->signature()));
906 }
908 // setup result
909 result.set_static(resolved_klass, sel_method, CHECK);
910 }
912 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
913 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
914 bool check_access, bool check_null_and_abstract, TRAPS) {
915 methodHandle resolved_method;
916 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
917 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
918 }
920 // throws linktime exceptions
921 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
922 Symbol* method_name, Symbol* method_signature,
923 KlassHandle current_klass, bool check_access, TRAPS) {
924 // normal method resolution
925 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
927 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
928 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
930 // check if not static
931 if (resolved_method->is_static()) {
932 ResourceMark rm(THREAD);
933 char buf[200];
934 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
935 resolved_method->name(),
936 resolved_method->signature()));
937 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
938 }
939 }
941 // throws runtime exceptions
942 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
943 methodHandle resolved_method,
944 KlassHandle resolved_klass,
945 Handle recv,
946 KlassHandle recv_klass,
947 bool check_null_and_abstract,
948 TRAPS) {
950 // setup default return values
951 int vtable_index = Method::invalid_vtable_index;
952 methodHandle selected_method;
954 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
956 // runtime method resolution
957 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
958 THROW(vmSymbols::java_lang_NullPointerException());
959 }
961 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
962 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
963 // a missing receiver might result in a bogus lookup.
964 assert(resolved_method->method_holder()->is_linked(), "must be linked");
966 // do lookup based on receiver klass using the vtable index
967 if (resolved_method->method_holder()->is_interface()) { // miranda method
968 vtable_index = vtable_index_of_miranda_method(resolved_klass,
969 resolved_method->name(),
970 resolved_method->signature(), CHECK);
972 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
974 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
975 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
976 } else {
977 // at this point we are sure that resolved_method is virtual and not
978 // a miranda method; therefore, it must have a valid vtable index.
979 assert(!resolved_method->has_itable_index(), "");
980 vtable_index = resolved_method->vtable_index();
981 // We could get a negative vtable_index for final methods,
982 // because as an optimization they are they are never put in the vtable,
983 // unless they override an existing method.
984 // If we do get a negative, it means the resolved method is the the selected
985 // method, and it can never be changed by an override.
986 if (vtable_index == Method::nonvirtual_vtable_index) {
987 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
988 selected_method = resolved_method;
989 } else {
990 // recv_klass might be an arrayKlassOop but all vtables start at
991 // the same place. The cast is to avoid virtual call and assertion.
992 InstanceKlass* inst = (InstanceKlass*)recv_klass();
993 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
994 }
995 }
997 // check if method exists
998 if (selected_method.is_null()) {
999 ResourceMark rm(THREAD);
1000 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1001 Method::name_and_sig_as_C_string(resolved_klass(),
1002 resolved_method->name(),
1003 resolved_method->signature()));
1004 }
1006 // check if abstract
1007 if (check_null_and_abstract && selected_method->is_abstract()) {
1008 ResourceMark rm(THREAD);
1009 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1010 Method::name_and_sig_as_C_string(resolved_klass(),
1011 selected_method->name(),
1012 selected_method->signature()));
1013 }
1015 // setup result
1016 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1017 }
1019 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
1020 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1021 bool check_access, bool check_null_and_abstract, TRAPS) {
1022 methodHandle resolved_method;
1023 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1024 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
1025 }
1027 // throws linktime exceptions
1028 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
1029 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
1030 // normal interface method resolution
1031 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1033 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1034 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1035 }
1037 // throws runtime exceptions
1038 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1039 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
1040 // check if receiver exists
1041 if (check_null_and_abstract && recv.is_null()) {
1042 THROW(vmSymbols::java_lang_NullPointerException());
1043 }
1045 // check if receiver klass implements the resolved interface
1046 if (!recv_klass->is_subtype_of(resolved_klass())) {
1047 ResourceMark rm(THREAD);
1048 char buf[200];
1049 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1050 recv_klass()->external_name(),
1051 resolved_klass()->external_name());
1052 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1053 }
1054 // do lookup based on receiver klass
1055 methodHandle sel_method;
1056 lookup_instance_method_in_klasses(sel_method, recv_klass,
1057 resolved_method->name(),
1058 resolved_method->signature(), CHECK);
1059 if (sel_method.is_null() && !check_null_and_abstract) {
1060 // In theory this is a harmless placeholder value, but
1061 // in practice leaving in null affects the nsk default method tests.
1062 // This needs further study.
1063 sel_method = resolved_method;
1064 }
1065 // check if method exists
1066 if (sel_method.is_null()) {
1067 ResourceMark rm(THREAD);
1068 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1069 Method::name_and_sig_as_C_string(recv_klass(),
1070 resolved_method->name(),
1071 resolved_method->signature()));
1072 }
1073 // check access
1074 if (sel_method->method_holder()->is_interface()) {
1075 // Method holder is an interface. Throw Illegal Access Error if sel_method
1076 // is neither public nor private.
1077 if (!(sel_method->is_public() || sel_method->is_private())) {
1078 ResourceMark rm(THREAD);
1079 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1080 Method::name_and_sig_as_C_string(recv_klass(),
1081 sel_method->name(),
1082 sel_method->signature()));
1083 }
1084 }
1085 else {
1086 // Method holder is a class. Throw Illegal Access Error if sel_method
1087 // is not public.
1088 if (!sel_method->is_public()) {
1089 ResourceMark rm(THREAD);
1090 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1091 Method::name_and_sig_as_C_string(recv_klass(),
1092 sel_method->name(),
1093 sel_method->signature()));
1094 }
1095 }
1096 // check if abstract
1097 if (check_null_and_abstract && sel_method->is_abstract()) {
1098 ResourceMark rm(THREAD);
1099 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1100 Method::name_and_sig_as_C_string(recv_klass(),
1101 sel_method->name(),
1102 sel_method->signature()));
1103 }
1104 // setup result
1105 if (!resolved_method->has_itable_index()) {
1106 int vtable_index = resolved_method->vtable_index();
1107 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1108 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1109 return;
1110 }
1111 int itable_index = resolved_method()->itable_index();
1112 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1113 }
1116 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1117 KlassHandle resolved_klass,
1118 Symbol* method_name,
1119 Symbol* method_signature,
1120 KlassHandle current_klass,
1121 bool check_access) {
1122 EXCEPTION_MARK;
1123 methodHandle method_result;
1124 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1125 if (HAS_PENDING_EXCEPTION) {
1126 CLEAR_PENDING_EXCEPTION;
1127 return methodHandle();
1128 } else {
1129 return method_result;
1130 }
1131 }
1133 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1134 KlassHandle resolved_klass,
1135 Symbol* method_name,
1136 Symbol* method_signature,
1137 KlassHandle current_klass,
1138 bool check_access) {
1139 EXCEPTION_MARK;
1140 methodHandle method_result;
1141 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1142 if (HAS_PENDING_EXCEPTION) {
1143 CLEAR_PENDING_EXCEPTION;
1144 return methodHandle();
1145 } else {
1146 return method_result;
1147 }
1148 }
1150 methodHandle LinkResolver::resolve_virtual_call_or_null(
1151 KlassHandle receiver_klass,
1152 KlassHandle resolved_klass,
1153 Symbol* name,
1154 Symbol* signature,
1155 KlassHandle current_klass) {
1156 EXCEPTION_MARK;
1157 CallInfo info;
1158 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1159 if (HAS_PENDING_EXCEPTION) {
1160 CLEAR_PENDING_EXCEPTION;
1161 return methodHandle();
1162 }
1163 return info.selected_method();
1164 }
1166 methodHandle LinkResolver::resolve_interface_call_or_null(
1167 KlassHandle receiver_klass,
1168 KlassHandle resolved_klass,
1169 Symbol* name,
1170 Symbol* signature,
1171 KlassHandle current_klass) {
1172 EXCEPTION_MARK;
1173 CallInfo info;
1174 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1175 if (HAS_PENDING_EXCEPTION) {
1176 CLEAR_PENDING_EXCEPTION;
1177 return methodHandle();
1178 }
1179 return info.selected_method();
1180 }
1182 int LinkResolver::resolve_virtual_vtable_index(
1183 KlassHandle receiver_klass,
1184 KlassHandle resolved_klass,
1185 Symbol* name,
1186 Symbol* signature,
1187 KlassHandle current_klass) {
1188 EXCEPTION_MARK;
1189 CallInfo info;
1190 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1191 if (HAS_PENDING_EXCEPTION) {
1192 CLEAR_PENDING_EXCEPTION;
1193 return Method::invalid_vtable_index;
1194 }
1195 return info.vtable_index();
1196 }
1198 methodHandle LinkResolver::resolve_static_call_or_null(
1199 KlassHandle resolved_klass,
1200 Symbol* name,
1201 Symbol* signature,
1202 KlassHandle current_klass) {
1203 EXCEPTION_MARK;
1204 CallInfo info;
1205 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1206 if (HAS_PENDING_EXCEPTION) {
1207 CLEAR_PENDING_EXCEPTION;
1208 return methodHandle();
1209 }
1210 return info.selected_method();
1211 }
1213 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1214 KlassHandle current_klass) {
1215 EXCEPTION_MARK;
1216 CallInfo info;
1217 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1218 if (HAS_PENDING_EXCEPTION) {
1219 CLEAR_PENDING_EXCEPTION;
1220 return methodHandle();
1221 }
1222 return info.selected_method();
1223 }
1227 //------------------------------------------------------------------------------------------------------------------------
1228 // ConstantPool entries
1230 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1231 switch (byte) {
1232 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1233 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1234 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1235 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1236 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1237 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1238 }
1239 return;
1240 }
1242 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1243 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1244 // resolve klass
1245 resolve_klass(resolved_klass, pool, index, CHECK);
1247 // Get name, signature, and static klass
1248 method_name = pool->name_ref_at(index);
1249 method_signature = pool->signature_ref_at(index);
1250 current_klass = KlassHandle(THREAD, pool->pool_holder());
1251 }
1254 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1255 KlassHandle resolved_klass;
1256 Symbol* method_name = NULL;
1257 Symbol* method_signature = NULL;
1258 KlassHandle current_klass;
1259 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1260 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1261 }
1264 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1265 KlassHandle resolved_klass;
1266 Symbol* method_name = NULL;
1267 Symbol* method_signature = NULL;
1268 KlassHandle current_klass;
1269 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1270 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1271 }
1274 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1275 constantPoolHandle pool, int index,
1276 TRAPS) {
1278 KlassHandle resolved_klass;
1279 Symbol* method_name = NULL;
1280 Symbol* method_signature = NULL;
1281 KlassHandle current_klass;
1282 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1283 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1284 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1285 }
1288 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1289 KlassHandle resolved_klass;
1290 Symbol* method_name = NULL;
1291 Symbol* method_signature = NULL;
1292 KlassHandle current_klass;
1293 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1294 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1295 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1296 }
1299 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1300 assert(EnableInvokeDynamic, "");
1301 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1302 KlassHandle resolved_klass;
1303 Symbol* method_name = NULL;
1304 Symbol* method_signature = NULL;
1305 KlassHandle current_klass;
1306 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1307 if (TraceMethodHandles) {
1308 ResourceMark rm(THREAD);
1309 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1310 }
1311 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1312 }
1314 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1315 Symbol* method_name, Symbol* method_signature,
1316 KlassHandle current_klass,
1317 TRAPS) {
1318 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1319 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1320 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1321 methodHandle resolved_method;
1322 Handle resolved_appendix;
1323 Handle resolved_method_type;
1324 lookup_polymorphic_method(resolved_method, resolved_klass,
1325 method_name, method_signature,
1326 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1327 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1328 }
1331 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1332 assert(EnableInvokeDynamic, "");
1334 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1335 Symbol* method_name = pool->name_ref_at(index);
1336 Symbol* method_signature = pool->signature_ref_at(index);
1337 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1339 // Resolve the bootstrap specifier (BSM + optional arguments).
1340 Handle bootstrap_specifier;
1341 // Check if CallSite has been bound already:
1342 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1343 if (cpce->is_f1_null()) {
1344 int pool_index = cpce->constant_pool_index();
1345 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1346 assert(bsm_info != NULL, "");
1347 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1348 bootstrap_specifier = Handle(THREAD, bsm_info);
1349 }
1350 if (!cpce->is_f1_null()) {
1351 methodHandle method( THREAD, cpce->f1_as_method());
1352 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1353 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1354 result.set_handle(method, appendix, method_type, CHECK);
1355 return;
1356 }
1358 if (TraceMethodHandles) {
1359 ResourceMark rm(THREAD);
1360 tty->print_cr("resolve_invokedynamic #%d %s %s",
1361 ConstantPool::decode_invokedynamic_index(index),
1362 method_name->as_C_string(), method_signature->as_C_string());
1363 tty->print(" BSM info: "); bootstrap_specifier->print();
1364 }
1366 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1367 }
1369 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1370 Handle bootstrap_specifier,
1371 Symbol* method_name, Symbol* method_signature,
1372 KlassHandle current_klass,
1373 TRAPS) {
1374 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1375 // The appendix argument is likely to be a freshly-created CallSite.
1376 Handle resolved_appendix;
1377 Handle resolved_method_type;
1378 methodHandle resolved_method =
1379 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1380 bootstrap_specifier,
1381 method_name, method_signature,
1382 &resolved_appendix,
1383 &resolved_method_type,
1384 THREAD);
1385 if (HAS_PENDING_EXCEPTION) {
1386 if (TraceMethodHandles) {
1387 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION);
1388 PENDING_EXCEPTION->print();
1389 }
1390 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1391 // throw these guys, since they are already wrapped
1392 return;
1393 }
1394 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1395 // intercept only LinkageErrors which might have failed to wrap
1396 return;
1397 }
1398 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1399 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1400 CLEAR_PENDING_EXCEPTION;
1401 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1402 }
1403 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1404 }
1406 //------------------------------------------------------------------------------------------------------------------------
1407 #ifndef PRODUCT
1409 void CallInfo::print() {
1410 ResourceMark rm;
1411 const char* kindstr = "unknown";
1412 switch (_call_kind) {
1413 case direct_call: kindstr = "direct"; break;
1414 case vtable_call: kindstr = "vtable"; break;
1415 case itable_call: kindstr = "itable"; break;
1416 }
1417 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
1418 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
1419 }
1421 #endif
