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src/share/vm/interpreter/linkResolver.cpp@3af740792979
src/share/vm/interpreter/linkResolver.cpp
Mon, 14 May 2018 09:16:44 -0400
- author
- hseigel
- date
- Mon, 14 May 2018 09:16:44 -0400
- changeset 9403
- 3af740792979
- parent 9008
- 432f92e99174
- child 9448
- 73d689add964
- permissions
- -rw-r--r--
8199226: Improve field accesses
Reviewed-by: acorn, ahgross, rhalade
Contributed-by: harold.seigel@oracle.com
1 /*
2 * Copyright (c) 1997, 2018, 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 // Ignore overpasses so statics can be found during resolution
247 Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
249 if (klass->oop_is_array()) {
250 // Only consider klass and super klass for arrays
251 result = methodHandle(THREAD, result_oop);
252 return;
253 }
255 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
256 // ignore static and non-public methods of java.lang.Object,
257 // like clone, finalize, registerNatives.
258 if (in_imethod_resolve &&
259 result_oop != NULL &&
260 klass->is_interface() &&
261 (result_oop->is_static() || !result_oop->is_public()) &&
262 result_oop->method_holder() == SystemDictionary::Object_klass()) {
263 result_oop = NULL;
264 }
266 // Before considering default methods, check for an overpass in the
267 // current class if a method has not been found.
268 if (result_oop == NULL) {
269 result_oop = InstanceKlass::cast(klass())->find_method(name, signature);
270 }
272 if (result_oop == NULL) {
273 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
274 if (default_methods != NULL) {
275 result_oop = InstanceKlass::find_method(default_methods, name, signature);
276 }
277 }
279 if (checkpolymorphism && EnableInvokeDynamic && result_oop != NULL) {
280 vmIntrinsics::ID iid = result_oop->intrinsic_id();
281 if (MethodHandles::is_signature_polymorphic(iid)) {
282 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
283 return;
284 }
285 }
286 result = methodHandle(THREAD, result_oop);
287 }
289 // returns first instance method
290 // Looks up method in classes, then looks up local default methods
291 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
292 Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
293 result = methodHandle(THREAD, result_oop);
294 while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
295 KlassHandle super_klass = KlassHandle(THREAD, result->method_holder()->super());
296 result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature, Klass::find_overpass));
297 }
299 if (klass->oop_is_array()) {
300 // Only consider klass and super klass for arrays
301 return;
302 }
304 if (result.is_null()) {
305 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
306 if (default_methods != NULL) {
307 result = methodHandle(InstanceKlass::find_method(default_methods, name, signature));
308 assert(result.is_null() || !result->is_static(), "static defaults not allowed");
309 }
310 }
311 }
313 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
314 methodHandle resolved_method) {
316 int vtable_index = Method::invalid_vtable_index;
317 Symbol* name = resolved_method->name();
318 Symbol* signature = resolved_method->signature();
320 // First check in default method array
321 if (!resolved_method->is_abstract() &&
322 (InstanceKlass::cast(klass())->default_methods() != NULL)) {
323 int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(),
324 name, signature, Klass::find_overpass,
325 Klass::find_static, Klass::find_private);
326 if (index >= 0 ) {
327 vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
328 }
329 }
330 if (vtable_index == Method::invalid_vtable_index) {
331 // get vtable_index for miranda methods
332 ResourceMark rm;
333 klassVtable *vt = InstanceKlass::cast(klass())->vtable();
334 vtable_index = vt->index_of_miranda(name, signature);
335 }
336 return vtable_index;
337 }
339 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
340 InstanceKlass *ik = InstanceKlass::cast(klass());
342 // Specify 'true' in order to skip default methods when searching the
343 // interfaces. Function lookup_method_in_klasses() already looked for
344 // the method in the default methods table.
345 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature, Klass::skip_defaults));
346 }
348 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
349 KlassHandle klass, Symbol* name, Symbol* full_signature,
350 KlassHandle current_klass,
351 Handle *appendix_result_or_null,
352 Handle *method_type_result,
353 TRAPS) {
354 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
355 if (TraceMethodHandles) {
356 ResourceMark rm(THREAD);
357 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
358 vmIntrinsics::name_at(iid), klass->external_name(),
359 name->as_C_string(), full_signature->as_C_string());
360 }
361 if (EnableInvokeDynamic &&
362 klass() == SystemDictionary::MethodHandle_klass() &&
363 iid != vmIntrinsics::_none) {
364 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
365 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
366 // Do not erase last argument type (MemberName) if it is a static linkTo method.
367 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
368 TempNewSymbol basic_signature =
369 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
370 if (TraceMethodHandles) {
371 ResourceMark rm(THREAD);
372 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
373 name->as_C_string(),
374 full_signature->as_C_string(),
375 basic_signature->as_C_string());
376 }
377 result = SystemDictionary::find_method_handle_intrinsic(iid,
378 basic_signature,
379 CHECK);
380 if (result.not_null()) {
381 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
382 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
383 assert(basic_signature == result->signature(), "predict the result signature");
384 if (TraceMethodHandles) {
385 tty->print("lookup_polymorphic_method => intrinsic ");
386 result->print_on(tty);
387 }
388 return;
389 }
390 } else if (iid == vmIntrinsics::_invokeGeneric
391 && !THREAD->is_Compiler_thread()
392 && appendix_result_or_null != NULL) {
393 // This is a method with type-checking semantics.
394 // We will ask Java code to spin an adapter method for it.
395 if (!MethodHandles::enabled()) {
396 // Make sure the Java part of the runtime has been booted up.
397 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
398 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
399 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
400 Handle(),
401 Handle(),
402 true,
403 CHECK);
404 }
405 }
407 Handle appendix;
408 Handle method_type;
409 result = SystemDictionary::find_method_handle_invoker(name,
410 full_signature,
411 current_klass,
412 &appendix,
413 &method_type,
414 CHECK);
415 if (TraceMethodHandles) {
416 tty->print("lookup_polymorphic_method => (via Java) ");
417 result->print_on(tty);
418 tty->print(" lookup_polymorphic_method => appendix = ");
419 if (appendix.is_null()) tty->print_cr("(none)");
420 else appendix->print_on(tty);
421 }
422 if (result.not_null()) {
423 #ifdef ASSERT
424 ResourceMark rm(THREAD);
426 TempNewSymbol basic_signature =
427 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
428 int actual_size_of_params = result->size_of_parameters();
429 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
430 // +1 for MethodHandle.this, +1 for trailing MethodType
431 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
432 if (appendix.not_null()) expected_size_of_params += 1;
433 if (actual_size_of_params != expected_size_of_params) {
434 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
435 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
436 result->print();
437 }
438 assert(actual_size_of_params == expected_size_of_params,
439 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
440 #endif //ASSERT
442 assert(appendix_result_or_null != NULL, "");
443 (*appendix_result_or_null) = appendix;
444 (*method_type_result) = method_type;
445 return;
446 }
447 }
448 }
449 }
451 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
452 KlassHandle resolved_klass,
453 KlassHandle sel_klass,
454 methodHandle sel_method,
455 TRAPS) {
457 AccessFlags flags = sel_method->access_flags();
459 // Special case: arrays always override "clone". JVMS 2.15.
460 // If the resolved klass is an array class, and the declaring class
461 // is java.lang.Object and the method is "clone", set the flags
462 // to public.
463 //
464 // We'll check for the method name first, as that's most likely
465 // to be false (so we'll short-circuit out of these tests).
466 if (sel_method->name() == vmSymbols::clone_name() &&
467 sel_klass() == SystemDictionary::Object_klass() &&
468 resolved_klass->oop_is_array()) {
469 // We need to change "protected" to "public".
470 assert(flags.is_protected(), "clone not protected?");
471 jint new_flags = flags.as_int();
472 new_flags = new_flags & (~JVM_ACC_PROTECTED);
473 new_flags = new_flags | JVM_ACC_PUBLIC;
474 flags.set_flags(new_flags);
475 }
476 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
478 if (!Reflection::verify_field_access(ref_klass(),
479 resolved_klass(),
480 sel_klass(),
481 flags,
482 true)) {
483 ResourceMark rm(THREAD);
484 Exceptions::fthrow(
485 THREAD_AND_LOCATION,
486 vmSymbols::java_lang_IllegalAccessError(),
487 "tried to access method %s.%s%s from class %s",
488 sel_klass->external_name(),
489 sel_method->name()->as_C_string(),
490 sel_method->signature()->as_C_string(),
491 ref_klass->external_name()
492 );
493 return;
494 }
495 }
497 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
498 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
499 // This method is used only
500 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
501 // and
502 // (2) in Bytecode_invoke::static_target
503 // It appears to fail when applied to an invokeinterface call site.
504 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
505 // resolve klass
506 if (code == Bytecodes::_invokedynamic) {
507 resolved_klass = SystemDictionary::MethodHandle_klass();
508 Symbol* method_name = vmSymbols::invoke_name();
509 Symbol* method_signature = pool->signature_ref_at(index);
510 KlassHandle current_klass(THREAD, pool->pool_holder());
511 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
512 return;
513 }
515 resolve_klass(resolved_klass, pool, index, CHECK);
517 Symbol* method_name = pool->name_ref_at(index);
518 Symbol* method_signature = pool->signature_ref_at(index);
519 KlassHandle current_klass(THREAD, pool->pool_holder());
521 if (pool->has_preresolution()
522 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
523 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
524 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
525 if (result_oop != NULL) {
526 resolved_method = methodHandle(THREAD, result_oop);
527 return;
528 }
529 }
531 if (code == Bytecodes::_invokeinterface) {
532 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
533 } else if (code == Bytecodes::_invokevirtual) {
534 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
535 } else if (!resolved_klass->is_interface()) {
536 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
537 } else {
538 bool nostatics = (code == Bytecodes::_invokestatic) ? false : true;
539 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, nostatics, CHECK);
540 }
541 }
543 void LinkResolver::check_method_loader_constraints(methodHandle& resolved_method,
544 KlassHandle resolved_klass,
545 Symbol* method_name,
546 Symbol* method_signature,
547 KlassHandle current_klass,
548 const char* method_type, TRAPS) {
549 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
550 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
551 {
552 ResourceMark rm(THREAD);
553 Symbol* failed_type_symbol =
554 SystemDictionary::check_signature_loaders(method_signature, loader,
555 class_loader, true, CHECK);
556 if (failed_type_symbol != NULL) {
557 const char* msg = "loader constraint violation: when resolving %s"
558 " \"%s\" the class loader (instance of %s) of the current class, %s,"
559 " and the class loader (instance of %s) for the method's defining class, %s, have"
560 " different Class objects for the type %s used in the signature";
561 char* sig = Method::name_and_sig_as_C_string(resolved_klass(), method_name, method_signature);
562 const char* loader1 = SystemDictionary::loader_name(loader());
563 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
564 const char* loader2 = SystemDictionary::loader_name(class_loader());
565 char* target = InstanceKlass::cast(resolved_method->method_holder())
566 ->name()->as_C_string();
567 char* failed_type_name = failed_type_symbol->as_C_string();
568 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
569 strlen(current) + strlen(loader2) + strlen(target) +
570 strlen(failed_type_name) + strlen(method_type) + 1;
571 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
572 jio_snprintf(buf, buflen, msg, method_type, sig, loader1, current, loader2,
573 target, failed_type_name);
574 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
575 }
576 }
577 }
579 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
580 Symbol* method_name, Symbol* method_signature,
581 KlassHandle current_klass, bool check_access,
582 bool require_methodref, TRAPS) {
584 Handle nested_exception;
586 // 1. check if methodref required, that resolved_klass is not interfacemethodref
587 if (require_methodref && resolved_klass->is_interface()) {
588 ResourceMark rm(THREAD);
589 char buf[200];
590 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
591 resolved_klass()->external_name());
592 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
593 }
595 // 2. lookup method in resolved klass and its super klasses
596 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, true, false, CHECK);
598 if (resolved_method.is_null() && !resolved_klass->oop_is_array()) { // not found in the class hierarchy
599 // 3. lookup method in all the interfaces implemented by the resolved klass
600 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
602 if (resolved_method.is_null()) {
603 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
604 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
605 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
606 if (HAS_PENDING_EXCEPTION) {
607 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
608 CLEAR_PENDING_EXCEPTION;
609 }
610 }
611 }
613 if (resolved_method.is_null()) {
614 // 4. method lookup failed
615 ResourceMark rm(THREAD);
616 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
617 Method::name_and_sig_as_C_string(resolved_klass(),
618 method_name,
619 method_signature),
620 nested_exception);
621 }
623 // 5. access checks, access checking may be turned off when calling from within the VM.
624 if (check_access) {
625 assert(current_klass.not_null() , "current_klass should not be null");
627 // check if method can be accessed by the referring class
628 check_method_accessability(current_klass,
629 resolved_klass,
630 KlassHandle(THREAD, resolved_method->method_holder()),
631 resolved_method,
632 CHECK);
634 // check loader constraints
635 check_method_loader_constraints(resolved_method, resolved_klass, method_name,
636 method_signature, current_klass, "method", CHECK);
637 }
638 }
640 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
641 KlassHandle resolved_klass,
642 Symbol* method_name,
643 Symbol* method_signature,
644 KlassHandle current_klass,
645 bool check_access,
646 bool nostatics, TRAPS) {
648 // check if klass is interface
649 if (!resolved_klass->is_interface()) {
650 ResourceMark rm(THREAD);
651 char buf[200];
652 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
653 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
654 }
656 // lookup method in this interface or its super, java.lang.Object
657 // JDK8: also look for static methods
658 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, false, true, CHECK);
660 if (resolved_method.is_null() && !resolved_klass->oop_is_array()) {
661 // lookup method in all the super-interfaces
662 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
663 }
665 if (resolved_method.is_null()) {
666 // no method found
667 ResourceMark rm(THREAD);
668 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
669 Method::name_and_sig_as_C_string(resolved_klass(),
670 method_name,
671 method_signature));
672 }
674 if (check_access) {
675 // JDK8 adds non-public interface methods, and accessability check requirement
676 assert(current_klass.not_null() , "current_klass should not be null");
678 // check if method can be accessed by the referring class
679 check_method_accessability(current_klass,
680 resolved_klass,
681 KlassHandle(THREAD, resolved_method->method_holder()),
682 resolved_method,
683 CHECK);
685 check_method_loader_constraints(resolved_method, resolved_klass, method_name,
686 method_signature, current_klass, "interface method", CHECK);
687 }
689 if (nostatics && resolved_method->is_static()) {
690 ResourceMark rm(THREAD);
691 char buf[200];
692 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
693 Method::name_and_sig_as_C_string(resolved_klass(),
694 resolved_method->name(), resolved_method->signature()));
695 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
696 }
698 if (TraceItables && Verbose) {
699 ResourceMark rm(THREAD);
700 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
701 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
702 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
703 Method::name_and_sig_as_C_string(resolved_klass(),
704 resolved_method->name(),
705 resolved_method->signature()),
706 resolved_method->method_holder()->internal_name()
707 );
708 resolved_method->access_flags().print_on(tty);
709 if (resolved_method->is_default_method()) {
710 tty->print("default ");
711 }
712 if (resolved_method->is_overpass()) {
713 tty->print("overpass");
714 }
715 tty->cr();
716 }
717 }
719 //------------------------------------------------------------------------------------------------------------------------
720 // Field resolution
722 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
723 KlassHandle resolved_klass,
724 KlassHandle sel_klass,
725 fieldDescriptor& fd,
726 TRAPS) {
727 if (!Reflection::verify_field_access(ref_klass(),
728 resolved_klass(),
729 sel_klass(),
730 fd.access_flags(),
731 true)) {
732 ResourceMark rm(THREAD);
733 Exceptions::fthrow(
734 THREAD_AND_LOCATION,
735 vmSymbols::java_lang_IllegalAccessError(),
736 "tried to access field %s.%s from class %s",
737 sel_klass->external_name(),
738 fd.name()->as_C_string(),
739 ref_klass->external_name()
740 );
741 return;
742 }
743 }
745 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
746 // Load these early in case the resolve of the containing klass fails
747 Symbol* field = pool->name_ref_at(index);
748 Symbol* sig = pool->signature_ref_at(index);
750 // resolve specified klass
751 KlassHandle resolved_klass;
752 resolve_klass(resolved_klass, pool, index, CHECK);
754 KlassHandle current_klass(THREAD, pool->pool_holder());
755 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
756 }
758 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
759 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
760 TRAPS) {
761 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
762 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
763 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
765 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
766 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
768 // Check if there's a resolved klass containing the field
769 if (resolved_klass.is_null()) {
770 ResourceMark rm(THREAD);
771 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
772 }
774 // Resolve instance field
775 KlassHandle sel_klass(THREAD, resolved_klass->find_field(field, sig, &fd));
776 // check if field exists; i.e., if a klass containing the field def has been selected
777 if (sel_klass.is_null()) {
778 ResourceMark rm(THREAD);
779 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
780 }
782 // Access checking may be turned off when calling from within the VM.
783 if (check_access) {
785 // check access
786 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
788 // check for errors
789 if (is_static != fd.is_static()) {
790 ResourceMark rm(THREAD);
791 char msg[200];
792 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
793 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
794 }
796 // Final fields can only be accessed from its own class.
797 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
798 THROW(vmSymbols::java_lang_IllegalAccessError());
799 }
801 // initialize resolved_klass if necessary
802 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
803 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
804 //
805 // note 2: we don't want to force initialization if we are just checking
806 // if the field access is legal; e.g., during compilation
807 if (is_static && initialize_class) {
808 sel_klass->initialize(CHECK);
809 }
810 }
812 if (sel_klass() != current_klass() && !current_klass.is_null()) {
813 HandleMark hm(THREAD);
814 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
815 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
816 {
817 ResourceMark rm(THREAD);
818 Symbol* failed_type_symbol =
819 SystemDictionary::check_signature_loaders(sig,
820 ref_loader, sel_loader,
821 false,
822 CHECK);
823 if (failed_type_symbol != NULL) {
824 const char* msg = "loader constraint violation: when resolving field"
825 " \"%s\" the class loader (instance of %s) of the referring class, "
826 "%s, and the class loader (instance of %s) for the field's resolved "
827 "type, %s, have different Class objects for that type";
828 char* field_name = field->as_C_string();
829 const char* loader1 = SystemDictionary::loader_name(ref_loader());
830 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
831 const char* loader2 = SystemDictionary::loader_name(sel_loader());
832 char* failed_type_name = failed_type_symbol->as_C_string();
833 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
834 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
835 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
836 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
837 failed_type_name);
838 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
839 }
840 }
841 }
843 // return information. note that the klass is set to the actual klass containing the
844 // field, otherwise access of static fields in superclasses will not work.
845 }
848 //------------------------------------------------------------------------------------------------------------------------
849 // Invoke resolution
850 //
851 // Naming conventions:
852 //
853 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
854 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
855 // resolved_klass the specified klass (i.e., specified via constant pool index)
856 // recv_klass the receiver klass
859 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
860 Symbol* method_signature, KlassHandle current_klass,
861 bool check_access, bool initialize_class, TRAPS) {
862 methodHandle resolved_method;
863 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
864 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
866 // Initialize klass (this should only happen if everything is ok)
867 if (initialize_class && resolved_klass->should_be_initialized()) {
868 resolved_klass->initialize(CHECK);
869 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
870 }
872 // setup result
873 result.set_static(resolved_klass, resolved_method, CHECK);
874 }
876 // throws linktime exceptions
877 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
878 Symbol* method_name, Symbol* method_signature,
879 KlassHandle current_klass, bool check_access, TRAPS) {
881 if (!resolved_klass->is_interface()) {
882 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
883 } else {
884 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
885 }
886 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
888 // check if static
889 if (!resolved_method->is_static()) {
890 ResourceMark rm(THREAD);
891 char buf[200];
892 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
893 resolved_method->name(),
894 resolved_method->signature()));
895 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
896 }
897 }
900 void LinkResolver::resolve_special_call(CallInfo& result, Handle recv, KlassHandle resolved_klass, Symbol* method_name,
901 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
902 methodHandle resolved_method;
903 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
904 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, recv, check_access, CHECK);
905 }
907 // throws linktime exceptions
908 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
909 Symbol* method_name, Symbol* method_signature,
910 KlassHandle current_klass, bool check_access, TRAPS) {
912 // Invokespecial is called for multiple special reasons:
913 // <init>
914 // local private method invocation, for classes and interfaces
915 // superclass.method, which can also resolve to a default method
916 // and the selected method is recalculated relative to the direct superclass
917 // superinterface.method, which explicitly does not check shadowing
919 if (!resolved_klass->is_interface()) {
920 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
921 } else {
922 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
923 }
925 // check if method name is <init>, that it is found in same klass as static type
926 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
927 resolved_method->method_holder() != resolved_klass()) {
928 ResourceMark rm(THREAD);
929 Exceptions::fthrow(
930 THREAD_AND_LOCATION,
931 vmSymbols::java_lang_NoSuchMethodError(),
932 "%s: method %s%s not found",
933 resolved_klass->external_name(),
934 resolved_method->name()->as_C_string(),
935 resolved_method->signature()->as_C_string()
936 );
937 return;
938 }
940 // check if invokespecial's interface method reference is in an indirect superinterface
941 if (!current_klass.is_null() && resolved_klass->is_interface()) {
942 Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ?
943 current_klass() :
944 InstanceKlass::cast(current_klass())->host_klass();
945 // As of the fix for 4486457 we disable verification for all of the
946 // dynamically-generated bytecodes associated with the 1.4
947 // reflection implementation, not just those associated with
948 // sun/reflect/SerializationConstructorAccessor.
949 bool is_reflect = JDK_Version::is_gte_jdk14x_version() &&
950 UseNewReflection &&
951 klass_to_check->is_subclass_of(
952 SystemDictionary::reflect_MagicAccessorImpl_klass());
954 if (!is_reflect &&
955 !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) {
956 ResourceMark rm(THREAD);
957 char buf[200];
958 jio_snprintf(buf, sizeof(buf),
959 "Interface method reference: %s, is in an indirect superinterface of %s",
960 Method::name_and_sig_as_C_string(resolved_klass(),
961 resolved_method->name(),
962 resolved_method->signature()),
963 current_klass->external_name());
964 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
965 }
966 }
968 // check if not static
969 if (resolved_method->is_static()) {
970 ResourceMark rm(THREAD);
971 char buf[200];
972 jio_snprintf(buf, sizeof(buf),
973 "Expecting non-static method %s",
974 Method::name_and_sig_as_C_string(resolved_klass(),
975 resolved_method->name(),
976 resolved_method->signature()));
977 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
978 }
980 if (TraceItables && Verbose) {
981 ResourceMark rm(THREAD);
982 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
983 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
984 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
985 Method::name_and_sig_as_C_string(resolved_klass(),
986 resolved_method->name(),
987 resolved_method->signature()),
988 resolved_method->method_holder()->internal_name()
989 );
990 resolved_method->access_flags().print_on(tty);
991 if (resolved_method->is_default_method()) {
992 tty->print("default ");
993 }
994 if (resolved_method->is_overpass()) {
995 tty->print("overpass");
996 }
997 tty->cr();
998 }
999 }
1001 // throws runtime exceptions
1002 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1003 KlassHandle current_klass, Handle recv, bool check_access, TRAPS) {
1005 // resolved method is selected method unless we have an old-style lookup
1006 // for a superclass method
1007 // Invokespecial for a superinterface, resolved method is selected method,
1008 // no checks for shadowing
1009 methodHandle sel_method(THREAD, resolved_method());
1011 if (check_access &&
1012 // check if the method is not <init>
1013 resolved_method->name() != vmSymbols::object_initializer_name()) {
1015 // check if this is an old-style super call and do a new lookup if so
1016 // a) check if ACC_SUPER flag is set for the current class
1017 if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
1018 // b) check if the class of the resolved_klass is a superclass
1019 // (not supertype in order to exclude interface classes) of the current class.
1020 // This check is not performed for super.invoke for interface methods
1021 // in super interfaces.
1022 current_klass->is_subclass_of(resolved_klass()) &&
1023 current_klass() != resolved_klass()) {
1024 // Lookup super method
1025 KlassHandle super_klass(THREAD, current_klass->super());
1026 lookup_instance_method_in_klasses(sel_method, super_klass,
1027 resolved_method->name(),
1028 resolved_method->signature(), CHECK);
1029 // check if found
1030 if (sel_method.is_null()) {
1031 ResourceMark rm(THREAD);
1032 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1033 Method::name_and_sig_as_C_string(resolved_klass(),
1034 resolved_method->name(),
1035 resolved_method->signature()));
1036 } else if (sel_method() != resolved_method()) {
1037 check_method_loader_constraints(sel_method, resolved_klass,
1038 sel_method->name(), sel_method->signature(),
1039 current_klass, "method", CHECK);
1040 }
1041 }
1043 // Check that the class of objectref (the receiver) is the current class or interface,
1044 // or a subtype of the current class or interface (the sender), otherwise invokespecial
1045 // throws IllegalAccessError.
1046 // The verifier checks that the sender is a subtype of the class in the I/MR operand.
1047 // The verifier also checks that the receiver is a subtype of the sender, if the sender is
1048 // a class. If the sender is an interface, the check has to be performed at runtime.
1049 InstanceKlass* sender = InstanceKlass::cast(current_klass());
1050 sender = sender->is_anonymous() ? InstanceKlass::cast(sender->host_klass()) : sender;
1051 if (sender->is_interface() && recv.not_null()) {
1052 Klass* receiver_klass = recv->klass();
1053 if (!receiver_klass->is_subtype_of(sender)) {
1054 ResourceMark rm(THREAD);
1055 char buf[500];
1056 jio_snprintf(buf, sizeof(buf),
1057 "Receiver class %s must be the current class or a subtype of interface %s",
1058 receiver_klass->name()->as_C_string(),
1059 sender->name()->as_C_string());
1060 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
1061 }
1062 }
1063 }
1065 // check if not static
1066 if (sel_method->is_static()) {
1067 ResourceMark rm(THREAD);
1068 char buf[200];
1069 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1070 resolved_method->name(),
1071 resolved_method->signature()));
1072 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1073 }
1075 // check if abstract
1076 if (sel_method->is_abstract()) {
1077 ResourceMark rm(THREAD);
1078 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1079 Method::name_and_sig_as_C_string(resolved_klass(),
1080 sel_method->name(),
1081 sel_method->signature()));
1082 }
1084 if (TraceItables && Verbose) {
1085 ResourceMark rm(THREAD);
1086 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1087 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1088 Method::name_and_sig_as_C_string(resolved_klass(),
1089 sel_method->name(),
1090 sel_method->signature()),
1091 sel_method->method_holder()->internal_name()
1092 );
1093 sel_method->access_flags().print_on(tty);
1094 if (sel_method->is_default_method()) {
1095 tty->print("default ");
1096 }
1097 if (sel_method->is_overpass()) {
1098 tty->print("overpass");
1099 }
1100 tty->cr();
1101 }
1103 // setup result
1104 result.set_static(resolved_klass, sel_method, CHECK);
1105 }
1107 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
1108 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1109 bool check_access, bool check_null_and_abstract, TRAPS) {
1110 methodHandle resolved_method;
1111 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1112 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
1113 }
1115 // throws linktime exceptions
1116 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
1117 Symbol* method_name, Symbol* method_signature,
1118 KlassHandle current_klass, bool check_access, TRAPS) {
1119 // normal method resolution
1120 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1122 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1123 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1125 // check if private interface method
1126 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1127 ResourceMark rm(THREAD);
1128 char buf[200];
1129 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1130 Method::name_and_sig_as_C_string(resolved_klass(),
1131 resolved_method->name(),
1132 resolved_method->signature()),
1133 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
1134 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1135 }
1137 // check if not static
1138 if (resolved_method->is_static()) {
1139 ResourceMark rm(THREAD);
1140 char buf[200];
1141 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1142 resolved_method->name(),
1143 resolved_method->signature()));
1144 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1145 }
1147 if (PrintVtables && Verbose) {
1148 ResourceMark rm(THREAD);
1149 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
1150 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
1151 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1152 Method::name_and_sig_as_C_string(resolved_klass(),
1153 resolved_method->name(),
1154 resolved_method->signature()),
1155 resolved_method->method_holder()->internal_name()
1156 );
1157 resolved_method->access_flags().print_on(tty);
1158 if (resolved_method->is_default_method()) {
1159 tty->print("default ");
1160 }
1161 if (resolved_method->is_overpass()) {
1162 tty->print("overpass");
1163 }
1164 tty->cr();
1165 }
1166 }
1168 // throws runtime exceptions
1169 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1170 methodHandle resolved_method,
1171 KlassHandle resolved_klass,
1172 Handle recv,
1173 KlassHandle recv_klass,
1174 bool check_null_and_abstract,
1175 TRAPS) {
1177 // setup default return values
1178 int vtable_index = Method::invalid_vtable_index;
1179 methodHandle selected_method;
1181 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
1183 // runtime method resolution
1184 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1185 THROW(vmSymbols::java_lang_NullPointerException());
1186 }
1188 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1189 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1190 // a missing receiver might result in a bogus lookup.
1191 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1193 // do lookup based on receiver klass using the vtable index
1194 if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1195 vtable_index = vtable_index_of_interface_method(resolved_klass,
1196 resolved_method);
1197 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1199 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
1200 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1201 } else {
1202 // at this point we are sure that resolved_method is virtual and not
1203 // a default or miranda method; therefore, it must have a valid vtable index.
1204 assert(!resolved_method->has_itable_index(), "");
1205 vtable_index = resolved_method->vtable_index();
1206 // We could get a negative vtable_index for final methods,
1207 // because as an optimization they are they are never put in the vtable,
1208 // unless they override an existing method.
1209 // If we do get a negative, it means the resolved method is the the selected
1210 // method, and it can never be changed by an override.
1211 if (vtable_index == Method::nonvirtual_vtable_index) {
1212 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1213 selected_method = resolved_method;
1214 } else {
1215 // recv_klass might be an arrayKlassOop but all vtables start at
1216 // the same place. The cast is to avoid virtual call and assertion.
1217 InstanceKlass* inst = (InstanceKlass*)recv_klass();
1218 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1219 }
1220 }
1222 // check if method exists
1223 if (selected_method.is_null()) {
1224 ResourceMark rm(THREAD);
1225 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1226 Method::name_and_sig_as_C_string(resolved_klass(),
1227 resolved_method->name(),
1228 resolved_method->signature()));
1229 }
1231 // check if abstract
1232 if (check_null_and_abstract && selected_method->is_abstract()) {
1233 ResourceMark rm(THREAD);
1234 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1235 Method::name_and_sig_as_C_string(resolved_klass(),
1236 selected_method->name(),
1237 selected_method->signature()));
1238 }
1240 if (PrintVtables && Verbose) {
1241 ResourceMark rm(THREAD);
1242 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ",
1243 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1244 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1245 Method::name_and_sig_as_C_string(resolved_klass(),
1246 resolved_method->name(),
1247 resolved_method->signature()),
1248 selected_method->method_holder()->internal_name(),
1249 vtable_index
1250 );
1251 selected_method->access_flags().print_on(tty);
1252 if (selected_method->is_default_method()) {
1253 tty->print("default ");
1254 }
1255 if (selected_method->is_overpass()) {
1256 tty->print("overpass");
1257 }
1258 tty->cr();
1259 }
1260 // setup result
1261 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1262 }
1264 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
1265 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1266 bool check_access, bool check_null_and_abstract, TRAPS) {
1267 methodHandle resolved_method;
1268 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1269 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
1270 }
1272 // throws linktime exceptions
1273 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
1274 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
1275 // normal interface method resolution
1276 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1278 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1279 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1280 }
1282 // throws runtime exceptions
1283 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1284 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
1285 // check if receiver exists
1286 if (check_null_and_abstract && recv.is_null()) {
1287 THROW(vmSymbols::java_lang_NullPointerException());
1288 }
1290 // check if private interface method
1291 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1292 ResourceMark rm(THREAD);
1293 char buf[200];
1294 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
1295 Method::name_and_sig_as_C_string(resolved_klass(),
1296 resolved_method->name(),
1297 resolved_method->signature()));
1298 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1299 }
1301 // check if receiver klass implements the resolved interface
1302 if (!recv_klass->is_subtype_of(resolved_klass())) {
1303 ResourceMark rm(THREAD);
1304 char buf[200];
1305 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1306 recv_klass()->external_name(),
1307 resolved_klass()->external_name());
1308 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1309 }
1311 // do lookup based on receiver klass
1312 methodHandle sel_method;
1313 // This search must match the linktime preparation search for itable initialization
1314 // to correctly enforce loader constraints for interface method inheritance
1315 lookup_instance_method_in_klasses(sel_method, recv_klass,
1316 resolved_method->name(),
1317 resolved_method->signature(), CHECK);
1318 if (sel_method.is_null() && !check_null_and_abstract) {
1319 // In theory this is a harmless placeholder value, but
1320 // in practice leaving in null affects the nsk default method tests.
1321 // This needs further study.
1322 sel_method = resolved_method;
1323 }
1324 // check if method exists
1325 if (sel_method.is_null()) {
1326 ResourceMark rm(THREAD);
1327 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1328 Method::name_and_sig_as_C_string(recv_klass(),
1329 resolved_method->name(),
1330 resolved_method->signature()));
1331 }
1332 // check access
1333 // Throw Illegal Access Error if sel_method is not public.
1334 if (!sel_method->is_public()) {
1335 ResourceMark rm(THREAD);
1336 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1337 Method::name_and_sig_as_C_string(recv_klass(),
1338 sel_method->name(),
1339 sel_method->signature()));
1340 }
1341 // check if abstract
1342 if (check_null_and_abstract && sel_method->is_abstract()) {
1343 ResourceMark rm(THREAD);
1344 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1345 Method::name_and_sig_as_C_string(recv_klass(),
1346 sel_method->name(),
1347 sel_method->signature()));
1348 }
1350 if (TraceItables && Verbose) {
1351 ResourceMark rm(THREAD);
1352 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1353 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1354 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1355 Method::name_and_sig_as_C_string(resolved_klass(),
1356 resolved_method->name(),
1357 resolved_method->signature()),
1358 sel_method->method_holder()->internal_name()
1359 );
1360 sel_method->access_flags().print_on(tty);
1361 if (sel_method->is_default_method()) {
1362 tty->print("default ");
1363 }
1364 if (sel_method->is_overpass()) {
1365 tty->print("overpass");
1366 }
1367 tty->cr();
1368 }
1369 // setup result
1370 if (!resolved_method->has_itable_index()) {
1371 int vtable_index = resolved_method->vtable_index();
1372 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1373 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1374 } else {
1375 int itable_index = resolved_method()->itable_index();
1376 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1377 }
1378 }
1381 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1382 KlassHandle resolved_klass,
1383 Symbol* method_name,
1384 Symbol* method_signature,
1385 KlassHandle current_klass,
1386 bool check_access) {
1387 EXCEPTION_MARK;
1388 methodHandle method_result;
1389 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1390 if (HAS_PENDING_EXCEPTION) {
1391 CLEAR_PENDING_EXCEPTION;
1392 return methodHandle();
1393 } else {
1394 return method_result;
1395 }
1396 }
1398 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1399 KlassHandle resolved_klass,
1400 Symbol* method_name,
1401 Symbol* method_signature,
1402 KlassHandle current_klass,
1403 bool check_access) {
1404 EXCEPTION_MARK;
1405 methodHandle method_result;
1406 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1407 if (HAS_PENDING_EXCEPTION) {
1408 CLEAR_PENDING_EXCEPTION;
1409 return methodHandle();
1410 } else {
1411 return method_result;
1412 }
1413 }
1415 methodHandle LinkResolver::resolve_virtual_call_or_null(
1416 KlassHandle receiver_klass,
1417 KlassHandle resolved_klass,
1418 Symbol* name,
1419 Symbol* signature,
1420 KlassHandle current_klass,
1421 bool check_access) {
1422 EXCEPTION_MARK;
1423 CallInfo info;
1424 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, check_access, false, THREAD);
1425 if (HAS_PENDING_EXCEPTION) {
1426 CLEAR_PENDING_EXCEPTION;
1427 return methodHandle();
1428 }
1429 return info.selected_method();
1430 }
1432 methodHandle LinkResolver::resolve_interface_call_or_null(
1433 KlassHandle receiver_klass,
1434 KlassHandle resolved_klass,
1435 Symbol* name,
1436 Symbol* signature,
1437 KlassHandle current_klass,
1438 bool check_access) {
1439 EXCEPTION_MARK;
1440 CallInfo info;
1441 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, check_access, false, THREAD);
1442 if (HAS_PENDING_EXCEPTION) {
1443 CLEAR_PENDING_EXCEPTION;
1444 return methodHandle();
1445 }
1446 return info.selected_method();
1447 }
1449 int LinkResolver::resolve_virtual_vtable_index(
1450 KlassHandle receiver_klass,
1451 KlassHandle resolved_klass,
1452 Symbol* name,
1453 Symbol* signature,
1454 KlassHandle current_klass) {
1455 EXCEPTION_MARK;
1456 CallInfo info;
1457 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1458 if (HAS_PENDING_EXCEPTION) {
1459 CLEAR_PENDING_EXCEPTION;
1460 return Method::invalid_vtable_index;
1461 }
1462 return info.vtable_index();
1463 }
1465 methodHandle LinkResolver::resolve_static_call_or_null(
1466 KlassHandle resolved_klass,
1467 Symbol* name,
1468 Symbol* signature,
1469 KlassHandle current_klass,
1470 bool check_access) {
1471 EXCEPTION_MARK;
1472 CallInfo info;
1473 resolve_static_call(info, resolved_klass, name, signature, current_klass, check_access, false, THREAD);
1474 if (HAS_PENDING_EXCEPTION) {
1475 CLEAR_PENDING_EXCEPTION;
1476 return methodHandle();
1477 }
1478 return info.selected_method();
1479 }
1481 methodHandle LinkResolver::resolve_special_call_or_null(
1482 KlassHandle resolved_klass,
1483 Symbol* name,
1484 Symbol* signature,
1485 KlassHandle current_klass,
1486 bool check_access) {
1487 EXCEPTION_MARK;
1488 CallInfo info;
1489 resolve_special_call(info, Handle(), resolved_klass, name, signature, current_klass, check_access, THREAD);
1490 if (HAS_PENDING_EXCEPTION) {
1491 CLEAR_PENDING_EXCEPTION;
1492 return methodHandle();
1493 }
1494 return info.selected_method();
1495 }
1499 //------------------------------------------------------------------------------------------------------------------------
1500 // ConstantPool entries
1502 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1503 switch (byte) {
1504 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1505 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1506 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1507 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1508 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1509 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1510 }
1511 return;
1512 }
1514 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1515 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1516 // resolve klass
1517 resolve_klass(resolved_klass, pool, index, CHECK);
1519 // Get name, signature, and static klass
1520 method_name = pool->name_ref_at(index);
1521 method_signature = pool->signature_ref_at(index);
1522 current_klass = KlassHandle(THREAD, pool->pool_holder());
1523 }
1526 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, 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 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1533 }
1536 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1537 KlassHandle resolved_klass;
1538 Symbol* method_name = NULL;
1539 Symbol* method_signature = NULL;
1540 KlassHandle current_klass;
1541 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1542 resolve_special_call(result, recv, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1543 }
1546 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1547 constantPoolHandle pool, int index,
1548 TRAPS) {
1550 KlassHandle resolved_klass;
1551 Symbol* method_name = NULL;
1552 Symbol* method_signature = NULL;
1553 KlassHandle current_klass;
1554 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1555 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1556 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1557 }
1560 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1561 KlassHandle resolved_klass;
1562 Symbol* method_name = NULL;
1563 Symbol* method_signature = NULL;
1564 KlassHandle current_klass;
1565 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1566 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1567 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1568 }
1571 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1572 assert(EnableInvokeDynamic, "");
1573 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1574 KlassHandle resolved_klass;
1575 Symbol* method_name = NULL;
1576 Symbol* method_signature = NULL;
1577 KlassHandle current_klass;
1578 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1579 if (TraceMethodHandles) {
1580 ResourceMark rm(THREAD);
1581 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1582 }
1583 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1584 }
1586 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1587 Symbol* method_name, Symbol* method_signature,
1588 KlassHandle current_klass,
1589 TRAPS) {
1590 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1591 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1592 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1593 methodHandle resolved_method;
1594 Handle resolved_appendix;
1595 Handle resolved_method_type;
1596 lookup_polymorphic_method(resolved_method, resolved_klass,
1597 method_name, method_signature,
1598 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1599 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1600 }
1602 static void wrap_invokedynamic_exception(TRAPS) {
1603 if (HAS_PENDING_EXCEPTION) {
1604 if (TraceMethodHandles) {
1605 tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1606 PENDING_EXCEPTION->print();
1607 }
1608 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1609 // throw these guys, since they are already wrapped
1610 return;
1611 }
1612 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1613 // intercept only LinkageErrors which might have failed to wrap
1614 return;
1615 }
1616 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1617 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1618 CLEAR_PENDING_EXCEPTION;
1619 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1620 }
1621 }
1623 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1624 assert(EnableInvokeDynamic, "");
1626 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1627 Symbol* method_name = pool->name_ref_at(index);
1628 Symbol* method_signature = pool->signature_ref_at(index);
1629 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1631 // Resolve the bootstrap specifier (BSM + optional arguments).
1632 Handle bootstrap_specifier;
1633 // Check if CallSite has been bound already:
1634 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1635 if (cpce->is_f1_null()) {
1636 int pool_index = cpce->constant_pool_index();
1637 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1638 wrap_invokedynamic_exception(CHECK);
1639 assert(bsm_info != NULL, "");
1640 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1641 bootstrap_specifier = Handle(THREAD, bsm_info);
1642 }
1643 if (!cpce->is_f1_null()) {
1644 methodHandle method( THREAD, cpce->f1_as_method());
1645 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1646 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1647 result.set_handle(method, appendix, method_type, THREAD);
1648 wrap_invokedynamic_exception(CHECK);
1649 return;
1650 }
1652 if (TraceMethodHandles) {
1653 ResourceMark rm(THREAD);
1654 tty->print_cr("resolve_invokedynamic #%d %s %s",
1655 ConstantPool::decode_invokedynamic_index(index),
1656 method_name->as_C_string(), method_signature->as_C_string());
1657 tty->print(" BSM info: "); bootstrap_specifier->print();
1658 }
1660 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1661 }
1663 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1664 Handle bootstrap_specifier,
1665 Symbol* method_name, Symbol* method_signature,
1666 KlassHandle current_klass,
1667 TRAPS) {
1668 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1669 // The appendix argument is likely to be a freshly-created CallSite.
1670 Handle resolved_appendix;
1671 Handle resolved_method_type;
1672 methodHandle resolved_method =
1673 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1674 bootstrap_specifier,
1675 method_name, method_signature,
1676 &resolved_appendix,
1677 &resolved_method_type,
1678 THREAD);
1679 wrap_invokedynamic_exception(CHECK);
1680 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1681 wrap_invokedynamic_exception(CHECK);
1682 }
1684 //------------------------------------------------------------------------------------------------------------------------
1685 #ifndef PRODUCT
1687 void CallInfo::print() {
1688 ResourceMark rm;
1689 const char* kindstr = "unknown";
1690 switch (_call_kind) {
1691 case direct_call: kindstr = "direct"; break;
1692 case vtable_call: kindstr = "vtable"; break;
1693 case itable_call: kindstr = "itable"; break;
1694 }
1695 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
1696 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
1697 }
1699 #endif
