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src/share/vm/interpreter/linkResolver.cpp@a9becfeecd1b
src/share/vm/interpreter/linkResolver.cpp
Wed, 22 Jan 2014 17:42:23 -0800
- author
- kvn
- date
- Wed, 22 Jan 2014 17:42:23 -0800
- changeset 6503
- a9becfeecd1b
- parent 6195
- 5832cdaf89c6
- child 6232
- 1a023fd29afb
- child 6818
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Merge
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 default or miranda method. Compute the vtable index.
156 ResourceMark rm;
157 klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
158 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
159 resolved_method);
160 assert(index >= 0 , "we should have valid vtable index at this point");
162 kind = CallInfo::vtable_call;
163 } else if (resolved_method->has_vtable_index()) {
164 // Can occur if an interface redeclares a method of Object.
166 #ifdef ASSERT
167 // Ensure that this is really the case.
168 KlassHandle object_klass = SystemDictionary::Object_klass();
169 Method * object_resolved_method = object_klass()->vtable()->method_at(index);
170 assert(object_resolved_method->name() == resolved_method->name(),
171 err_msg("Object and interface method names should match at vtable index %d, %s != %s",
172 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string()));
173 assert(object_resolved_method->signature() == resolved_method->signature(),
174 err_msg("Object and interface method signatures should match at vtable index %d, %s != %s",
175 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string()));
176 #endif // ASSERT
178 kind = CallInfo::vtable_call;
179 } else {
180 // A regular interface call.
181 kind = CallInfo::itable_call;
182 index = resolved_method->itable_index();
183 }
184 assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index));
185 _call_kind = kind;
186 _call_index = index;
187 _resolved_appendix = Handle();
188 DEBUG_ONLY(verify());
189 }
191 #ifdef ASSERT
192 void CallInfo::verify() {
193 switch (call_kind()) { // the meaning and allowed value of index depends on kind
194 case CallInfo::direct_call:
195 if (_call_index == Method::nonvirtual_vtable_index) break;
196 // else fall through to check vtable index:
197 case CallInfo::vtable_call:
198 assert(resolved_klass()->verify_vtable_index(_call_index), "");
199 break;
200 case CallInfo::itable_call:
201 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
202 break;
203 case CallInfo::unknown_kind:
204 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
205 break;
206 default:
207 fatal(err_msg_res("Unexpected call kind %d", call_kind()));
208 }
209 }
210 #endif //ASSERT
214 //------------------------------------------------------------------------------------------------------------------------
215 // Klass resolution
217 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
218 if (!Reflection::verify_class_access(ref_klass(),
219 sel_klass(),
220 true)) {
221 ResourceMark rm(THREAD);
222 Exceptions::fthrow(
223 THREAD_AND_LOCATION,
224 vmSymbols::java_lang_IllegalAccessError(),
225 "tried to access class %s from class %s",
226 sel_klass->external_name(),
227 ref_klass->external_name()
228 );
229 return;
230 }
231 }
233 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
234 Klass* result_oop = pool->klass_ref_at(index, CHECK);
235 result = KlassHandle(THREAD, result_oop);
236 }
238 //------------------------------------------------------------------------------------------------------------------------
239 // Method resolution
240 //
241 // According to JVM spec. $5.4.3c & $5.4.3d
243 // Look up method in klasses, including static methods
244 // Then look up local default methods
245 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, bool checkpolymorphism, bool in_imethod_resolve, TRAPS) {
246 Method* result_oop = klass->uncached_lookup_method(name, signature);
248 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
249 // ignore static and non-public methods of java.lang.Object,
250 // like clone, finalize, registerNatives.
251 if (in_imethod_resolve &&
252 result_oop != NULL &&
253 klass->is_interface() &&
254 (result_oop->is_static() || !result_oop->is_public()) &&
255 result_oop->method_holder() == SystemDictionary::Object_klass()) {
256 result_oop = NULL;
257 }
259 if (result_oop == NULL) {
260 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
261 if (default_methods != NULL) {
262 result_oop = InstanceKlass::find_method(default_methods, name, signature);
263 }
264 }
266 if (checkpolymorphism && EnableInvokeDynamic && result_oop != NULL) {
267 vmIntrinsics::ID iid = result_oop->intrinsic_id();
268 if (MethodHandles::is_signature_polymorphic(iid)) {
269 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
270 return;
271 }
272 }
273 result = methodHandle(THREAD, result_oop);
274 }
276 // returns first instance method
277 // Looks up method in classes, then looks up local default methods
278 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
279 Method* result_oop = klass->uncached_lookup_method(name, signature);
280 result = methodHandle(THREAD, result_oop);
281 while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
282 KlassHandle super_klass = KlassHandle(THREAD, result->method_holder()->super());
283 result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature));
284 }
286 if (result.is_null()) {
287 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
288 if (default_methods != NULL) {
289 result = methodHandle(InstanceKlass::find_method(default_methods, name, signature));
290 assert(result.is_null() || !result->is_static(), "static defaults not allowed");
291 }
292 }
293 }
295 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
296 methodHandle resolved_method) {
298 int vtable_index = Method::invalid_vtable_index;
299 Symbol* name = resolved_method->name();
300 Symbol* signature = resolved_method->signature();
302 // First check in default method array
303 if (!resolved_method->is_abstract() &&
304 (InstanceKlass::cast(klass())->default_methods() != NULL)) {
305 int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature);
306 if (index >= 0 ) {
307 vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
308 }
309 }
310 if (vtable_index == Method::invalid_vtable_index) {
311 // get vtable_index for miranda methods
312 ResourceMark rm;
313 klassVtable *vt = InstanceKlass::cast(klass())->vtable();
314 vtable_index = vt->index_of_miranda(name, signature);
315 }
316 return vtable_index;
317 }
319 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
320 InstanceKlass *ik = InstanceKlass::cast(klass());
322 // Specify 'true' in order to skip default methods when searching the
323 // interfaces. Function lookup_method_in_klasses() already looked for
324 // the method in the default methods table.
325 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature, true));
326 }
328 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
329 KlassHandle klass, Symbol* name, Symbol* full_signature,
330 KlassHandle current_klass,
331 Handle *appendix_result_or_null,
332 Handle *method_type_result,
333 TRAPS) {
334 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
335 if (TraceMethodHandles) {
336 ResourceMark rm(THREAD);
337 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
338 vmIntrinsics::name_at(iid), klass->external_name(),
339 name->as_C_string(), full_signature->as_C_string());
340 }
341 if (EnableInvokeDynamic &&
342 klass() == SystemDictionary::MethodHandle_klass() &&
343 iid != vmIntrinsics::_none) {
344 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
345 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
346 // Do not erase last argument type (MemberName) if it is a static linkTo method.
347 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
348 TempNewSymbol basic_signature =
349 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
350 if (TraceMethodHandles) {
351 ResourceMark rm(THREAD);
352 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
353 name->as_C_string(),
354 full_signature->as_C_string(),
355 basic_signature->as_C_string());
356 }
357 result = SystemDictionary::find_method_handle_intrinsic(iid,
358 basic_signature,
359 CHECK);
360 if (result.not_null()) {
361 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
362 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
363 assert(basic_signature == result->signature(), "predict the result signature");
364 if (TraceMethodHandles) {
365 tty->print("lookup_polymorphic_method => intrinsic ");
366 result->print_on(tty);
367 }
368 return;
369 }
370 } else if (iid == vmIntrinsics::_invokeGeneric
371 && !THREAD->is_Compiler_thread()
372 && appendix_result_or_null != NULL) {
373 // This is a method with type-checking semantics.
374 // We will ask Java code to spin an adapter method for it.
375 if (!MethodHandles::enabled()) {
376 // Make sure the Java part of the runtime has been booted up.
377 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
378 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
379 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
380 Handle(),
381 Handle(),
382 true,
383 CHECK);
384 }
385 }
387 Handle appendix;
388 Handle method_type;
389 result = SystemDictionary::find_method_handle_invoker(name,
390 full_signature,
391 current_klass,
392 &appendix,
393 &method_type,
394 CHECK);
395 if (TraceMethodHandles) {
396 tty->print("lookup_polymorphic_method => (via Java) ");
397 result->print_on(tty);
398 tty->print(" lookup_polymorphic_method => appendix = ");
399 if (appendix.is_null()) tty->print_cr("(none)");
400 else appendix->print_on(tty);
401 }
402 if (result.not_null()) {
403 #ifdef ASSERT
404 ResourceMark rm(THREAD);
406 TempNewSymbol basic_signature =
407 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
408 int actual_size_of_params = result->size_of_parameters();
409 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
410 // +1 for MethodHandle.this, +1 for trailing MethodType
411 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
412 if (appendix.not_null()) expected_size_of_params += 1;
413 if (actual_size_of_params != expected_size_of_params) {
414 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
415 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
416 result->print();
417 }
418 assert(actual_size_of_params == expected_size_of_params,
419 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
420 #endif //ASSERT
422 assert(appendix_result_or_null != NULL, "");
423 (*appendix_result_or_null) = appendix;
424 (*method_type_result) = method_type;
425 return;
426 }
427 }
428 }
429 }
431 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
432 KlassHandle resolved_klass,
433 KlassHandle sel_klass,
434 methodHandle sel_method,
435 TRAPS) {
437 AccessFlags flags = sel_method->access_flags();
439 // Special case: arrays always override "clone". JVMS 2.15.
440 // If the resolved klass is an array class, and the declaring class
441 // is java.lang.Object and the method is "clone", set the flags
442 // to public.
443 //
444 // We'll check for the method name first, as that's most likely
445 // to be false (so we'll short-circuit out of these tests).
446 if (sel_method->name() == vmSymbols::clone_name() &&
447 sel_klass() == SystemDictionary::Object_klass() &&
448 resolved_klass->oop_is_array()) {
449 // We need to change "protected" to "public".
450 assert(flags.is_protected(), "clone not protected?");
451 jint new_flags = flags.as_int();
452 new_flags = new_flags & (~JVM_ACC_PROTECTED);
453 new_flags = new_flags | JVM_ACC_PUBLIC;
454 flags.set_flags(new_flags);
455 }
456 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
458 if (!Reflection::verify_field_access(ref_klass(),
459 resolved_klass(),
460 sel_klass(),
461 flags,
462 true)) {
463 ResourceMark rm(THREAD);
464 Exceptions::fthrow(
465 THREAD_AND_LOCATION,
466 vmSymbols::java_lang_IllegalAccessError(),
467 "tried to access method %s.%s%s from class %s",
468 sel_klass->external_name(),
469 sel_method->name()->as_C_string(),
470 sel_method->signature()->as_C_string(),
471 ref_klass->external_name()
472 );
473 return;
474 }
475 }
477 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
478 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
479 // This method is used only
480 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
481 // and
482 // (2) in Bytecode_invoke::static_target
483 // It appears to fail when applied to an invokeinterface call site.
484 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
485 // resolve klass
486 if (code == Bytecodes::_invokedynamic) {
487 resolved_klass = SystemDictionary::MethodHandle_klass();
488 Symbol* method_name = vmSymbols::invoke_name();
489 Symbol* method_signature = pool->signature_ref_at(index);
490 KlassHandle current_klass(THREAD, pool->pool_holder());
491 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
492 return;
493 }
495 resolve_klass(resolved_klass, pool, index, CHECK);
497 Symbol* method_name = pool->name_ref_at(index);
498 Symbol* method_signature = pool->signature_ref_at(index);
499 KlassHandle current_klass(THREAD, pool->pool_holder());
501 if (pool->has_preresolution()
502 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
503 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
504 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
505 if (result_oop != NULL) {
506 resolved_method = methodHandle(THREAD, result_oop);
507 return;
508 }
509 }
511 if (code == Bytecodes::_invokeinterface) {
512 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
513 } else if (code == Bytecodes::_invokevirtual) {
514 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
515 } else if (!resolved_klass->is_interface()) {
516 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
517 } else {
518 bool nostatics = (code == Bytecodes::_invokestatic) ? false : true;
519 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, nostatics, CHECK);
520 }
521 }
523 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
524 Symbol* method_name, Symbol* method_signature,
525 KlassHandle current_klass, bool check_access,
526 bool require_methodref, TRAPS) {
528 Handle nested_exception;
530 // 1. check if methodref required, that resolved_klass is not interfacemethodref
531 if (require_methodref && resolved_klass->is_interface()) {
532 ResourceMark rm(THREAD);
533 char buf[200];
534 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
535 resolved_klass()->external_name());
536 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
537 }
539 // 2. lookup method in resolved klass and its super klasses
540 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, true, false, CHECK);
542 if (resolved_method.is_null()) { // not found in the class hierarchy
543 // 3. lookup method in all the interfaces implemented by the resolved klass
544 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
546 if (resolved_method.is_null()) {
547 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
548 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
549 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
550 if (HAS_PENDING_EXCEPTION) {
551 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
552 CLEAR_PENDING_EXCEPTION;
553 }
554 }
556 if (resolved_method.is_null()) {
557 // 4. method lookup failed
558 ResourceMark rm(THREAD);
559 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
560 Method::name_and_sig_as_C_string(resolved_klass(),
561 method_name,
562 method_signature),
563 nested_exception);
564 }
565 }
567 // 5. check if method is concrete
568 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
569 ResourceMark rm(THREAD);
570 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
571 Method::name_and_sig_as_C_string(resolved_klass(),
572 method_name,
573 method_signature));
574 }
576 // 6. access checks, access checking may be turned off when calling from within the VM.
577 if (check_access) {
578 assert(current_klass.not_null() , "current_klass should not be null");
580 // check if method can be accessed by the referring class
581 check_method_accessability(current_klass,
582 resolved_klass,
583 KlassHandle(THREAD, resolved_method->method_holder()),
584 resolved_method,
585 CHECK);
587 // check loader constraints
588 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
589 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
590 {
591 ResourceMark rm(THREAD);
592 Symbol* failed_type_symbol =
593 SystemDictionary::check_signature_loaders(method_signature, loader,
594 class_loader, true, CHECK);
595 if (failed_type_symbol != NULL) {
596 const char* msg = "loader constraint violation: when resolving method"
597 " \"%s\" the class loader (instance of %s) of the current class, %s,"
598 " and the class loader (instance of %s) for the method's defining class, %s, have"
599 " different Class objects for the type %s used in the signature";
600 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
601 const char* loader1 = SystemDictionary::loader_name(loader());
602 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
603 const char* loader2 = SystemDictionary::loader_name(class_loader());
604 char* target = InstanceKlass::cast(resolved_method->method_holder())
605 ->name()->as_C_string();
606 char* failed_type_name = failed_type_symbol->as_C_string();
607 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
608 strlen(current) + strlen(loader2) + strlen(target) +
609 strlen(failed_type_name) + 1;
610 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
611 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
612 target, failed_type_name);
613 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
614 }
615 }
616 }
617 }
619 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
620 KlassHandle resolved_klass,
621 Symbol* method_name,
622 Symbol* method_signature,
623 KlassHandle current_klass,
624 bool check_access,
625 bool nostatics, TRAPS) {
627 // check if klass is interface
628 if (!resolved_klass->is_interface()) {
629 ResourceMark rm(THREAD);
630 char buf[200];
631 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
632 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
633 }
635 // lookup method in this interface or its super, java.lang.Object
636 // JDK8: also look for static methods
637 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, false, true, CHECK);
639 if (resolved_method.is_null()) {
640 // lookup method in all the super-interfaces
641 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
642 if (resolved_method.is_null()) {
643 // no method found
644 ResourceMark rm(THREAD);
645 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
646 Method::name_and_sig_as_C_string(resolved_klass(),
647 method_name,
648 method_signature));
649 }
650 }
652 if (nostatics && resolved_method->is_static()) {
653 ResourceMark rm(THREAD);
654 char buf[200];
655 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
656 resolved_method->name(),
657 resolved_method->signature()));
658 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
659 }
662 if (check_access) {
663 // JDK8 adds non-public interface methods, and accessability check requirement
664 assert(current_klass.not_null() , "current_klass should not be null");
666 // check if method can be accessed by the referring class
667 check_method_accessability(current_klass,
668 resolved_klass,
669 KlassHandle(THREAD, resolved_method->method_holder()),
670 resolved_method,
671 CHECK);
673 HandleMark hm(THREAD);
674 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
675 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
676 {
677 ResourceMark rm(THREAD);
678 Symbol* failed_type_symbol =
679 SystemDictionary::check_signature_loaders(method_signature, loader,
680 class_loader, true, CHECK);
681 if (failed_type_symbol != NULL) {
682 const char* msg = "loader constraint violation: when resolving "
683 "interface method \"%s\" the class loader (instance of %s) of the "
684 "current class, %s, and the class loader (instance of %s) for "
685 "the method's defining class, %s, have different Class objects for the type %s "
686 "used in the signature";
687 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
688 const char* loader1 = SystemDictionary::loader_name(loader());
689 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
690 const char* loader2 = SystemDictionary::loader_name(class_loader());
691 char* target = InstanceKlass::cast(resolved_method->method_holder())
692 ->name()->as_C_string();
693 char* failed_type_name = failed_type_symbol->as_C_string();
694 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
695 strlen(current) + strlen(loader2) + strlen(target) +
696 strlen(failed_type_name) + 1;
697 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
698 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
699 target, failed_type_name);
700 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
701 }
702 }
703 }
705 if (TraceItables && Verbose) {
706 ResourceMark rm(THREAD);
707 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
708 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
709 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
710 Method::name_and_sig_as_C_string(resolved_klass(),
711 resolved_method->name(),
712 resolved_method->signature()),
713 resolved_method->method_holder()->internal_name()
714 );
715 resolved_method->access_flags().print_on(tty);
716 if (resolved_method->is_default_method()) {
717 tty->print("default ");
718 }
719 if (resolved_method->is_overpass()) {
720 tty->print("overpass");
721 }
722 tty->cr();
723 }
724 }
726 //------------------------------------------------------------------------------------------------------------------------
727 // Field resolution
729 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
730 KlassHandle resolved_klass,
731 KlassHandle sel_klass,
732 fieldDescriptor& fd,
733 TRAPS) {
734 if (!Reflection::verify_field_access(ref_klass(),
735 resolved_klass(),
736 sel_klass(),
737 fd.access_flags(),
738 true)) {
739 ResourceMark rm(THREAD);
740 Exceptions::fthrow(
741 THREAD_AND_LOCATION,
742 vmSymbols::java_lang_IllegalAccessError(),
743 "tried to access field %s.%s from class %s",
744 sel_klass->external_name(),
745 fd.name()->as_C_string(),
746 ref_klass->external_name()
747 );
748 return;
749 }
750 }
752 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
753 // Load these early in case the resolve of the containing klass fails
754 Symbol* field = pool->name_ref_at(index);
755 Symbol* sig = pool->signature_ref_at(index);
757 // resolve specified klass
758 KlassHandle resolved_klass;
759 resolve_klass(resolved_klass, pool, index, CHECK);
761 KlassHandle current_klass(THREAD, pool->pool_holder());
762 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
763 }
765 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
766 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
767 TRAPS) {
768 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
769 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
770 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
772 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
773 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
775 // Check if there's a resolved klass containing the field
776 if (resolved_klass.is_null()) {
777 ResourceMark rm(THREAD);
778 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
779 }
781 // Resolve instance field
782 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
783 // check if field exists; i.e., if a klass containing the field def has been selected
784 if (sel_klass.is_null()) {
785 ResourceMark rm(THREAD);
786 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
787 }
789 if (!check_access)
790 // Access checking may be turned off when calling from within the VM.
791 return;
793 // check access
794 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
796 // check for errors
797 if (is_static != fd.is_static()) {
798 ResourceMark rm(THREAD);
799 char msg[200];
800 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
801 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
802 }
804 // Final fields can only be accessed from its own class.
805 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
806 THROW(vmSymbols::java_lang_IllegalAccessError());
807 }
809 // initialize resolved_klass if necessary
810 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
811 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
812 //
813 // note 2: we don't want to force initialization if we are just checking
814 // if the field access is legal; e.g., during compilation
815 if (is_static && initialize_class) {
816 sel_klass->initialize(CHECK);
817 }
819 if (sel_klass() != current_klass()) {
820 HandleMark hm(THREAD);
821 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
822 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
823 {
824 ResourceMark rm(THREAD);
825 Symbol* failed_type_symbol =
826 SystemDictionary::check_signature_loaders(sig,
827 ref_loader, sel_loader,
828 false,
829 CHECK);
830 if (failed_type_symbol != NULL) {
831 const char* msg = "loader constraint violation: when resolving field"
832 " \"%s\" the class loader (instance of %s) of the referring class, "
833 "%s, and the class loader (instance of %s) for the field's resolved "
834 "type, %s, have different Class objects for that type";
835 char* field_name = field->as_C_string();
836 const char* loader1 = SystemDictionary::loader_name(ref_loader());
837 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
838 const char* loader2 = SystemDictionary::loader_name(sel_loader());
839 char* failed_type_name = failed_type_symbol->as_C_string();
840 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
841 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
842 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
843 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
844 failed_type_name);
845 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
846 }
847 }
848 }
850 // return information. note that the klass is set to the actual klass containing the
851 // field, otherwise access of static fields in superclasses will not work.
852 }
855 //------------------------------------------------------------------------------------------------------------------------
856 // Invoke resolution
857 //
858 // Naming conventions:
859 //
860 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
861 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
862 // resolved_klass the specified klass (i.e., specified via constant pool index)
863 // recv_klass the receiver klass
866 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
867 Symbol* method_signature, KlassHandle current_klass,
868 bool check_access, bool initialize_class, TRAPS) {
869 methodHandle resolved_method;
870 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
871 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
873 // Initialize klass (this should only happen if everything is ok)
874 if (initialize_class && resolved_klass->should_be_initialized()) {
875 resolved_klass->initialize(CHECK);
876 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
877 }
879 // setup result
880 result.set_static(resolved_klass, resolved_method, CHECK);
881 }
883 // throws linktime exceptions
884 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
885 Symbol* method_name, Symbol* method_signature,
886 KlassHandle current_klass, bool check_access, TRAPS) {
888 if (!resolved_klass->is_interface()) {
889 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
890 } else {
891 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
892 }
893 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
895 // check if static
896 if (!resolved_method->is_static()) {
897 ResourceMark rm(THREAD);
898 char buf[200];
899 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
900 resolved_method->name(),
901 resolved_method->signature()));
902 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
903 }
904 }
907 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
908 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
909 methodHandle resolved_method;
910 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
911 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
912 }
914 // throws linktime exceptions
915 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
916 Symbol* method_name, Symbol* method_signature,
917 KlassHandle current_klass, bool check_access, TRAPS) {
919 // Invokespecial is called for multiple special reasons:
920 // <init>
921 // local private method invocation, for classes and interfaces
922 // superclass.method, which can also resolve to a default method
923 // and the selected method is recalculated relative to the direct superclass
924 // superinterface.method, which explicitly does not check shadowing
926 if (!resolved_klass->is_interface()) {
927 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
928 } else {
929 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
930 }
932 // check if method name is <init>, that it is found in same klass as static type
933 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
934 resolved_method->method_holder() != resolved_klass()) {
935 ResourceMark rm(THREAD);
936 Exceptions::fthrow(
937 THREAD_AND_LOCATION,
938 vmSymbols::java_lang_NoSuchMethodError(),
939 "%s: method %s%s not found",
940 resolved_klass->external_name(),
941 resolved_method->name()->as_C_string(),
942 resolved_method->signature()->as_C_string()
943 );
944 return;
945 }
947 // check if invokespecial's interface method reference is in an indirect superinterface
948 if (!current_klass.is_null() && resolved_klass->is_interface()) {
949 Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ?
950 current_klass() :
951 InstanceKlass::cast(current_klass())->host_klass();
952 // As of the fix for 4486457 we disable verification for all of the
953 // dynamically-generated bytecodes associated with the 1.4
954 // reflection implementation, not just those associated with
955 // sun/reflect/SerializationConstructorAccessor.
956 bool is_reflect = JDK_Version::is_gte_jdk14x_version() &&
957 UseNewReflection &&
958 klass_to_check->is_subclass_of(
959 SystemDictionary::reflect_MagicAccessorImpl_klass());
961 if (!is_reflect &&
962 !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) {
963 ResourceMark rm(THREAD);
964 char buf[200];
965 jio_snprintf(buf, sizeof(buf),
966 "Interface method reference: %s, is in an indirect superinterface of %s",
967 Method::name_and_sig_as_C_string(resolved_klass(),
968 resolved_method->name(),
969 resolved_method->signature()),
970 current_klass->external_name());
971 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
972 }
973 }
975 // check if not static
976 if (resolved_method->is_static()) {
977 ResourceMark rm(THREAD);
978 char buf[200];
979 jio_snprintf(buf, sizeof(buf),
980 "Expecting non-static method %s",
981 Method::name_and_sig_as_C_string(resolved_klass(),
982 resolved_method->name(),
983 resolved_method->signature()));
984 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
985 }
987 if (TraceItables && Verbose) {
988 ResourceMark rm(THREAD);
989 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
990 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
991 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
992 Method::name_and_sig_as_C_string(resolved_klass(),
993 resolved_method->name(),
994 resolved_method->signature()),
995 resolved_method->method_holder()->internal_name()
996 );
997 resolved_method->access_flags().print_on(tty);
998 if (resolved_method->is_default_method()) {
999 tty->print("default ");
1000 }
1001 if (resolved_method->is_overpass()) {
1002 tty->print("overpass");
1003 }
1004 tty->cr();
1005 }
1006 }
1008 // throws runtime exceptions
1009 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1010 KlassHandle current_klass, bool check_access, TRAPS) {
1012 // resolved method is selected method unless we have an old-style lookup
1013 // for a superclass method
1014 // Invokespecial for a superinterface, resolved method is selected method,
1015 // no checks for shadowing
1016 methodHandle sel_method(THREAD, resolved_method());
1018 // check if this is an old-style super call and do a new lookup if so
1019 { KlassHandle method_klass = KlassHandle(THREAD,
1020 resolved_method->method_holder());
1022 if (check_access &&
1023 // a) check if ACC_SUPER flag is set for the current class
1024 (current_klass->is_super() || !AllowNonVirtualCalls) &&
1025 // b) check if the class of the resolved_klass is a superclass
1026 // (not supertype in order to exclude interface classes) of the current class.
1027 // This check is not performed for super.invoke for interface methods
1028 // in super interfaces.
1029 current_klass->is_subclass_of(resolved_klass()) &&
1030 current_klass() != resolved_klass() &&
1031 // c) check if the method is not <init>
1032 resolved_method->name() != vmSymbols::object_initializer_name()) {
1033 // Lookup super method
1034 KlassHandle super_klass(THREAD, current_klass->super());
1035 lookup_instance_method_in_klasses(sel_method, super_klass,
1036 resolved_method->name(),
1037 resolved_method->signature(), CHECK);
1038 // check if found
1039 if (sel_method.is_null()) {
1040 ResourceMark rm(THREAD);
1041 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1042 Method::name_and_sig_as_C_string(resolved_klass(),
1043 resolved_method->name(),
1044 resolved_method->signature()));
1045 }
1046 }
1047 }
1049 // check if not static
1050 if (sel_method->is_static()) {
1051 ResourceMark rm(THREAD);
1052 char buf[200];
1053 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1054 resolved_method->name(),
1055 resolved_method->signature()));
1056 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1057 }
1059 // check if abstract
1060 if (sel_method->is_abstract()) {
1061 ResourceMark rm(THREAD);
1062 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1063 Method::name_and_sig_as_C_string(resolved_klass(),
1064 sel_method->name(),
1065 sel_method->signature()));
1066 }
1068 if (TraceItables && Verbose) {
1069 ResourceMark rm(THREAD);
1070 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1071 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1072 Method::name_and_sig_as_C_string(resolved_klass(),
1073 sel_method->name(),
1074 sel_method->signature()),
1075 sel_method->method_holder()->internal_name()
1076 );
1077 sel_method->access_flags().print_on(tty);
1078 if (sel_method->is_default_method()) {
1079 tty->print("default ");
1080 }
1081 if (sel_method->is_overpass()) {
1082 tty->print("overpass");
1083 }
1084 tty->cr();
1085 }
1087 // setup result
1088 result.set_static(resolved_klass, sel_method, CHECK);
1089 }
1091 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
1092 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1093 bool check_access, bool check_null_and_abstract, TRAPS) {
1094 methodHandle resolved_method;
1095 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1096 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
1097 }
1099 // throws linktime exceptions
1100 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
1101 Symbol* method_name, Symbol* method_signature,
1102 KlassHandle current_klass, bool check_access, TRAPS) {
1103 // normal method resolution
1104 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1106 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1107 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1109 // check if private interface method
1110 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1111 ResourceMark rm(THREAD);
1112 char buf[200];
1113 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1114 Method::name_and_sig_as_C_string(resolved_klass(),
1115 resolved_method->name(),
1116 resolved_method->signature()),
1117 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
1118 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1119 }
1121 // check if not static
1122 if (resolved_method->is_static()) {
1123 ResourceMark rm(THREAD);
1124 char buf[200];
1125 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1126 resolved_method->name(),
1127 resolved_method->signature()));
1128 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1129 }
1131 if (PrintVtables && Verbose) {
1132 ResourceMark rm(THREAD);
1133 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
1134 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
1135 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1136 Method::name_and_sig_as_C_string(resolved_klass(),
1137 resolved_method->name(),
1138 resolved_method->signature()),
1139 resolved_method->method_holder()->internal_name()
1140 );
1141 resolved_method->access_flags().print_on(tty);
1142 if (resolved_method->is_default_method()) {
1143 tty->print("default ");
1144 }
1145 if (resolved_method->is_overpass()) {
1146 tty->print("overpass");
1147 }
1148 tty->cr();
1149 }
1150 }
1152 // throws runtime exceptions
1153 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1154 methodHandle resolved_method,
1155 KlassHandle resolved_klass,
1156 Handle recv,
1157 KlassHandle recv_klass,
1158 bool check_null_and_abstract,
1159 TRAPS) {
1161 // setup default return values
1162 int vtable_index = Method::invalid_vtable_index;
1163 methodHandle selected_method;
1165 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
1167 // runtime method resolution
1168 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1169 THROW(vmSymbols::java_lang_NullPointerException());
1170 }
1172 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1173 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1174 // a missing receiver might result in a bogus lookup.
1175 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1177 // do lookup based on receiver klass using the vtable index
1178 if (resolved_method->method_holder()->is_interface()) { // miranda method
1179 vtable_index = vtable_index_of_interface_method(resolved_klass,
1180 resolved_method);
1181 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1183 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
1184 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1185 } else {
1186 // at this point we are sure that resolved_method is virtual and not
1187 // a miranda method; therefore, it must have a valid vtable index.
1188 assert(!resolved_method->has_itable_index(), "");
1189 vtable_index = resolved_method->vtable_index();
1190 // We could get a negative vtable_index for final methods,
1191 // because as an optimization they are they are never put in the vtable,
1192 // unless they override an existing method.
1193 // If we do get a negative, it means the resolved method is the the selected
1194 // method, and it can never be changed by an override.
1195 if (vtable_index == Method::nonvirtual_vtable_index) {
1196 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1197 selected_method = resolved_method;
1198 } else {
1199 // recv_klass might be an arrayKlassOop but all vtables start at
1200 // the same place. The cast is to avoid virtual call and assertion.
1201 InstanceKlass* inst = (InstanceKlass*)recv_klass();
1202 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1203 }
1204 }
1206 // check if method exists
1207 if (selected_method.is_null()) {
1208 ResourceMark rm(THREAD);
1209 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1210 Method::name_and_sig_as_C_string(resolved_klass(),
1211 resolved_method->name(),
1212 resolved_method->signature()));
1213 }
1215 // check if abstract
1216 if (check_null_and_abstract && selected_method->is_abstract()) {
1217 ResourceMark rm(THREAD);
1218 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1219 Method::name_and_sig_as_C_string(resolved_klass(),
1220 selected_method->name(),
1221 selected_method->signature()));
1222 }
1224 if (PrintVtables && Verbose) {
1225 ResourceMark rm(THREAD);
1226 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ",
1227 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1228 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1229 Method::name_and_sig_as_C_string(resolved_klass(),
1230 resolved_method->name(),
1231 resolved_method->signature()),
1232 selected_method->method_holder()->internal_name(),
1233 vtable_index
1234 );
1235 selected_method->access_flags().print_on(tty);
1236 if (selected_method->is_default_method()) {
1237 tty->print("default ");
1238 }
1239 if (selected_method->is_overpass()) {
1240 tty->print("overpass");
1241 }
1242 tty->cr();
1243 }
1244 // setup result
1245 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1246 }
1248 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
1249 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1250 bool check_access, bool check_null_and_abstract, TRAPS) {
1251 methodHandle resolved_method;
1252 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1253 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
1254 }
1256 // throws linktime exceptions
1257 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
1258 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
1259 // normal interface method resolution
1260 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1262 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1263 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1264 }
1266 // throws runtime exceptions
1267 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1268 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
1269 // check if receiver exists
1270 if (check_null_and_abstract && recv.is_null()) {
1271 THROW(vmSymbols::java_lang_NullPointerException());
1272 }
1274 // check if private interface method
1275 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1276 ResourceMark rm(THREAD);
1277 char buf[200];
1278 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
1279 Method::name_and_sig_as_C_string(resolved_klass(),
1280 resolved_method->name(),
1281 resolved_method->signature()));
1282 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1283 }
1285 // check if receiver klass implements the resolved interface
1286 if (!recv_klass->is_subtype_of(resolved_klass())) {
1287 ResourceMark rm(THREAD);
1288 char buf[200];
1289 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1290 recv_klass()->external_name(),
1291 resolved_klass()->external_name());
1292 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1293 }
1295 // do lookup based on receiver klass
1296 methodHandle sel_method;
1297 // This search must match the linktime preparation search for itable initialization
1298 // to correctly enforce loader constraints for interface method inheritance
1299 lookup_instance_method_in_klasses(sel_method, recv_klass,
1300 resolved_method->name(),
1301 resolved_method->signature(), CHECK);
1302 if (sel_method.is_null() && !check_null_and_abstract) {
1303 // In theory this is a harmless placeholder value, but
1304 // in practice leaving in null affects the nsk default method tests.
1305 // This needs further study.
1306 sel_method = resolved_method;
1307 }
1308 // check if method exists
1309 if (sel_method.is_null()) {
1310 ResourceMark rm(THREAD);
1311 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1312 Method::name_and_sig_as_C_string(recv_klass(),
1313 resolved_method->name(),
1314 resolved_method->signature()));
1315 }
1316 // check access
1317 // Throw Illegal Access Error if sel_method is not public.
1318 if (!sel_method->is_public()) {
1319 ResourceMark rm(THREAD);
1320 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1321 Method::name_and_sig_as_C_string(recv_klass(),
1322 sel_method->name(),
1323 sel_method->signature()));
1324 }
1325 // check if abstract
1326 if (check_null_and_abstract && sel_method->is_abstract()) {
1327 ResourceMark rm(THREAD);
1328 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1329 Method::name_and_sig_as_C_string(recv_klass(),
1330 sel_method->name(),
1331 sel_method->signature()));
1332 }
1334 if (TraceItables && Verbose) {
1335 ResourceMark rm(THREAD);
1336 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1337 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1338 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1339 Method::name_and_sig_as_C_string(resolved_klass(),
1340 resolved_method->name(),
1341 resolved_method->signature()),
1342 sel_method->method_holder()->internal_name()
1343 );
1344 sel_method->access_flags().print_on(tty);
1345 if (sel_method->is_default_method()) {
1346 tty->print("default ");
1347 }
1348 if (sel_method->is_overpass()) {
1349 tty->print("overpass");
1350 }
1351 tty->cr();
1352 }
1353 // setup result
1354 if (!resolved_method->has_itable_index()) {
1355 int vtable_index = resolved_method->vtable_index();
1356 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1357 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1358 } else {
1359 int itable_index = resolved_method()->itable_index();
1360 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1361 }
1362 }
1365 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1366 KlassHandle resolved_klass,
1367 Symbol* method_name,
1368 Symbol* method_signature,
1369 KlassHandle current_klass,
1370 bool check_access) {
1371 EXCEPTION_MARK;
1372 methodHandle method_result;
1373 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1374 if (HAS_PENDING_EXCEPTION) {
1375 CLEAR_PENDING_EXCEPTION;
1376 return methodHandle();
1377 } else {
1378 return method_result;
1379 }
1380 }
1382 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1383 KlassHandle resolved_klass,
1384 Symbol* method_name,
1385 Symbol* method_signature,
1386 KlassHandle current_klass,
1387 bool check_access) {
1388 EXCEPTION_MARK;
1389 methodHandle method_result;
1390 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1391 if (HAS_PENDING_EXCEPTION) {
1392 CLEAR_PENDING_EXCEPTION;
1393 return methodHandle();
1394 } else {
1395 return method_result;
1396 }
1397 }
1399 methodHandle LinkResolver::resolve_virtual_call_or_null(
1400 KlassHandle receiver_klass,
1401 KlassHandle resolved_klass,
1402 Symbol* name,
1403 Symbol* signature,
1404 KlassHandle current_klass) {
1405 EXCEPTION_MARK;
1406 CallInfo info;
1407 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1408 if (HAS_PENDING_EXCEPTION) {
1409 CLEAR_PENDING_EXCEPTION;
1410 return methodHandle();
1411 }
1412 return info.selected_method();
1413 }
1415 methodHandle LinkResolver::resolve_interface_call_or_null(
1416 KlassHandle receiver_klass,
1417 KlassHandle resolved_klass,
1418 Symbol* name,
1419 Symbol* signature,
1420 KlassHandle current_klass) {
1421 EXCEPTION_MARK;
1422 CallInfo info;
1423 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1424 if (HAS_PENDING_EXCEPTION) {
1425 CLEAR_PENDING_EXCEPTION;
1426 return methodHandle();
1427 }
1428 return info.selected_method();
1429 }
1431 int LinkResolver::resolve_virtual_vtable_index(
1432 KlassHandle receiver_klass,
1433 KlassHandle resolved_klass,
1434 Symbol* name,
1435 Symbol* signature,
1436 KlassHandle current_klass) {
1437 EXCEPTION_MARK;
1438 CallInfo info;
1439 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1440 if (HAS_PENDING_EXCEPTION) {
1441 CLEAR_PENDING_EXCEPTION;
1442 return Method::invalid_vtable_index;
1443 }
1444 return info.vtable_index();
1445 }
1447 methodHandle LinkResolver::resolve_static_call_or_null(
1448 KlassHandle resolved_klass,
1449 Symbol* name,
1450 Symbol* signature,
1451 KlassHandle current_klass) {
1452 EXCEPTION_MARK;
1453 CallInfo info;
1454 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1455 if (HAS_PENDING_EXCEPTION) {
1456 CLEAR_PENDING_EXCEPTION;
1457 return methodHandle();
1458 }
1459 return info.selected_method();
1460 }
1462 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1463 KlassHandle current_klass) {
1464 EXCEPTION_MARK;
1465 CallInfo info;
1466 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1467 if (HAS_PENDING_EXCEPTION) {
1468 CLEAR_PENDING_EXCEPTION;
1469 return methodHandle();
1470 }
1471 return info.selected_method();
1472 }
1476 //------------------------------------------------------------------------------------------------------------------------
1477 // ConstantPool entries
1479 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1480 switch (byte) {
1481 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1482 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1483 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1484 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1485 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1486 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1487 }
1488 return;
1489 }
1491 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1492 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1493 // resolve klass
1494 resolve_klass(resolved_klass, pool, index, CHECK);
1496 // Get name, signature, and static klass
1497 method_name = pool->name_ref_at(index);
1498 method_signature = pool->signature_ref_at(index);
1499 current_klass = KlassHandle(THREAD, pool->pool_holder());
1500 }
1503 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1504 KlassHandle resolved_klass;
1505 Symbol* method_name = NULL;
1506 Symbol* method_signature = NULL;
1507 KlassHandle current_klass;
1508 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1509 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1510 }
1513 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1514 KlassHandle resolved_klass;
1515 Symbol* method_name = NULL;
1516 Symbol* method_signature = NULL;
1517 KlassHandle current_klass;
1518 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1519 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1520 }
1523 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1524 constantPoolHandle pool, int index,
1525 TRAPS) {
1527 KlassHandle resolved_klass;
1528 Symbol* method_name = NULL;
1529 Symbol* method_signature = NULL;
1530 KlassHandle current_klass;
1531 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1532 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1533 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1534 }
1537 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1538 KlassHandle resolved_klass;
1539 Symbol* method_name = NULL;
1540 Symbol* method_signature = NULL;
1541 KlassHandle current_klass;
1542 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1543 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1544 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1545 }
1548 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1549 assert(EnableInvokeDynamic, "");
1550 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1551 KlassHandle resolved_klass;
1552 Symbol* method_name = NULL;
1553 Symbol* method_signature = NULL;
1554 KlassHandle current_klass;
1555 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1556 if (TraceMethodHandles) {
1557 ResourceMark rm(THREAD);
1558 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1559 }
1560 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1561 }
1563 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1564 Symbol* method_name, Symbol* method_signature,
1565 KlassHandle current_klass,
1566 TRAPS) {
1567 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1568 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1569 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1570 methodHandle resolved_method;
1571 Handle resolved_appendix;
1572 Handle resolved_method_type;
1573 lookup_polymorphic_method(resolved_method, resolved_klass,
1574 method_name, method_signature,
1575 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1576 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1577 }
1580 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1581 assert(EnableInvokeDynamic, "");
1583 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1584 Symbol* method_name = pool->name_ref_at(index);
1585 Symbol* method_signature = pool->signature_ref_at(index);
1586 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1588 // Resolve the bootstrap specifier (BSM + optional arguments).
1589 Handle bootstrap_specifier;
1590 // Check if CallSite has been bound already:
1591 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1592 if (cpce->is_f1_null()) {
1593 int pool_index = cpce->constant_pool_index();
1594 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1595 assert(bsm_info != NULL, "");
1596 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1597 bootstrap_specifier = Handle(THREAD, bsm_info);
1598 }
1599 if (!cpce->is_f1_null()) {
1600 methodHandle method( THREAD, cpce->f1_as_method());
1601 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1602 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1603 result.set_handle(method, appendix, method_type, CHECK);
1604 return;
1605 }
1607 if (TraceMethodHandles) {
1608 ResourceMark rm(THREAD);
1609 tty->print_cr("resolve_invokedynamic #%d %s %s",
1610 ConstantPool::decode_invokedynamic_index(index),
1611 method_name->as_C_string(), method_signature->as_C_string());
1612 tty->print(" BSM info: "); bootstrap_specifier->print();
1613 }
1615 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1616 }
1618 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1619 Handle bootstrap_specifier,
1620 Symbol* method_name, Symbol* method_signature,
1621 KlassHandle current_klass,
1622 TRAPS) {
1623 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1624 // The appendix argument is likely to be a freshly-created CallSite.
1625 Handle resolved_appendix;
1626 Handle resolved_method_type;
1627 methodHandle resolved_method =
1628 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1629 bootstrap_specifier,
1630 method_name, method_signature,
1631 &resolved_appendix,
1632 &resolved_method_type,
1633 THREAD);
1634 if (HAS_PENDING_EXCEPTION) {
1635 if (TraceMethodHandles) {
1636 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION);
1637 PENDING_EXCEPTION->print();
1638 }
1639 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1640 // throw these guys, since they are already wrapped
1641 return;
1642 }
1643 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1644 // intercept only LinkageErrors which might have failed to wrap
1645 return;
1646 }
1647 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1648 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1649 CLEAR_PENDING_EXCEPTION;
1650 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1651 }
1652 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1653 }
1655 //------------------------------------------------------------------------------------------------------------------------
1656 #ifndef PRODUCT
1658 void CallInfo::print() {
1659 ResourceMark rm;
1660 const char* kindstr = "unknown";
1661 switch (_call_kind) {
1662 case direct_call: kindstr = "direct"; break;
1663 case vtable_call: kindstr = "vtable"; break;
1664 case itable_call: kindstr = "itable"; break;
1665 }
1666 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
1667 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
1668 }
1670 #endif
