29 #include "compiler/compileBroker.hpp"
30 #include "gc_interface/collectedHeap.inline.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "prims/nativeLookup.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/fieldDescriptor.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/reflection.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/thread.inline.hpp"
47 #include "runtime/vmThread.hpp"
48
49 //------------------------------------------------------------------------------------------------------------------------
50 // Implementation of FieldAccessInfo
51
52 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset,
53 BasicType field_type, AccessFlags access_flags) {
54 _klass = klass;
55 _name = name;
56 _field_index = field_index;
57 _field_offset = field_offset;
58 _field_type = field_type;
59 _access_flags = access_flags;
60 }
61
62
63 //------------------------------------------------------------------------------------------------------------------------
64 // Implementation of CallInfo
65
66
67 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
68 int vtable_index = Method::nonvirtual_vtable_index;
69 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
70 }
71
72
73 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) {
74 // This is only called for interface methods. If the resolved_method
75 // comes from java/lang/Object, it can be the subject of a virtual call, so
76 // we should pick the vtable index from the resolved method.
77 // Other than that case, there is no valid vtable index to specify.
78 int vtable_index = Method::invalid_vtable_index;
79 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) {
80 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");
81 vtable_index = resolved_method->vtable_index();
82 }
83 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
84 }
85
86 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
87 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
88 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
89 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
90 }
91
92 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) {
93 if (resolved_method.is_null()) {
94 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
95 }
96 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
97 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
98 resolved_method->is_compiled_lambda_form(),
99 "linkMethod must return one of these");
100 int vtable_index = Method::nonvirtual_vtable_index;
101 assert(resolved_method->vtable_index() == vtable_index, "");
102 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
103 _resolved_appendix = resolved_appendix;
104 _resolved_method_type = resolved_method_type;
105 }
106
107 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
108 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
109 _resolved_klass = resolved_klass;
110 _selected_klass = selected_klass;
111 _resolved_method = resolved_method;
112 _selected_method = selected_method;
113 _vtable_index = vtable_index;
114 _resolved_appendix = Handle();
115 if (CompilationPolicy::must_be_compiled(selected_method)) {
116 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
117
118 // Note: with several active threads, the must_be_compiled may be true
119 // while can_be_compiled is false; remove assert
120 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
121 if (THREAD->is_Compiler_thread()) {
122 // don't force compilation, resolve was on behalf of compiler
123 return;
124 }
125 if (selected_method->method_holder()->is_not_initialized()) {
126 // 'is_not_initialized' means not only '!is_initialized', but also that
127 // initialization has not been started yet ('!being_initialized')
128 // Do not force compilation of methods in uninitialized classes.
129 // Note that doing this would throw an assert later,
130 // in CompileBroker::compile_method.
131 // We sometimes use the link resolver to do reflective lookups
132 // even before classes are initialized.
133 return;
134 }
135 CompileBroker::compile_method(selected_method, InvocationEntryBci,
136 CompilationPolicy::policy()->initial_compile_level(),
137 methodHandle(), 0, "must_be_compiled", CHECK);
138 }
139 }
140
141
142 //------------------------------------------------------------------------------------------------------------------------
143 // Klass resolution
144
145 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
146 if (!Reflection::verify_class_access(ref_klass(),
147 sel_klass(),
148 true)) {
149 ResourceMark rm(THREAD);
150 Exceptions::fthrow(
151 THREAD_AND_LOCATION,
152 vmSymbols::java_lang_IllegalAccessError(),
153 "tried to access class %s from class %s",
154 sel_klass->external_name(),
155 ref_klass->external_name()
156 );
157 return;
158 }
159 }
160
161 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
162 Klass* result_oop = pool->klass_ref_at(index, CHECK);
163 result = KlassHandle(THREAD, result_oop);
164 }
165
166 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
167 Klass* result_oop =
168 ConstantPool::klass_ref_at_if_loaded_check(pool, index, CHECK);
169 result = KlassHandle(THREAD, result_oop);
170 }
171
172
173 //------------------------------------------------------------------------------------------------------------------------
174 // Method resolution
175 //
176 // According to JVM spec. $5.4.3c & $5.4.3d
177
178 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
179 Method* result_oop = klass->uncached_lookup_method(name, signature);
180 if (EnableInvokeDynamic && result_oop != NULL) {
181 vmIntrinsics::ID iid = result_oop->intrinsic_id();
182 if (MethodHandles::is_signature_polymorphic(iid)) {
183 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
184 return;
185 }
186 }
187 result = methodHandle(THREAD, result_oop);
188 }
189
190 // returns first instance method
191 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
192 Method* result_oop = klass->uncached_lookup_method(name, signature);
343 resolved_klass(),
344 sel_klass(),
345 flags,
346 true)) {
347 ResourceMark rm(THREAD);
348 Exceptions::fthrow(
349 THREAD_AND_LOCATION,
350 vmSymbols::java_lang_IllegalAccessError(),
351 "tried to access method %s.%s%s from class %s",
352 sel_klass->external_name(),
353 sel_method->name()->as_C_string(),
354 sel_method->signature()->as_C_string(),
355 ref_klass->external_name()
356 );
357 return;
358 }
359 }
360
361 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
362 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
363
364 // resolve klass
365 if (code == Bytecodes::_invokedynamic) {
366 resolved_klass = SystemDictionary::MethodHandle_klass();
367 Symbol* method_name = vmSymbols::invoke_name();
368 Symbol* method_signature = pool->signature_ref_at(index);
369 KlassHandle current_klass(THREAD, pool->pool_holder());
370 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
371 return;
372 }
373
374 resolve_klass(resolved_klass, pool, index, CHECK);
375
376 Symbol* method_name = pool->name_ref_at(index);
377 Symbol* method_signature = pool->signature_ref_at(index);
378 KlassHandle current_klass(THREAD, pool->pool_holder());
379
380 if (pool->has_preresolution()
381 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
382 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
563 fieldDescriptor& fd,
564 TRAPS) {
565 if (!Reflection::verify_field_access(ref_klass(),
566 resolved_klass(),
567 sel_klass(),
568 fd.access_flags(),
569 true)) {
570 ResourceMark rm(THREAD);
571 Exceptions::fthrow(
572 THREAD_AND_LOCATION,
573 vmSymbols::java_lang_IllegalAccessError(),
574 "tried to access field %s.%s from class %s",
575 sel_klass->external_name(),
576 fd.name()->as_C_string(),
577 ref_klass->external_name()
578 );
579 return;
580 }
581 }
582
583 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
584 resolve_field(result, pool, index, byte, check_only, true, CHECK);
585 }
586
587 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
588 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
589 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
590
591 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
592 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
593
594 // resolve specified klass
595 KlassHandle resolved_klass;
596 if (update_pool) {
597 resolve_klass(resolved_klass, pool, index, CHECK);
598 } else {
599 resolve_klass_no_update(resolved_klass, pool, index, CHECK);
600 }
601 // Load these early in case the resolve of the containing klass fails
602 Symbol* field = pool->name_ref_at(index);
603 Symbol* sig = pool->signature_ref_at(index);
604 // Check if there's a resolved klass containing the field
605 if( resolved_klass.is_null() ) {
606 ResourceMark rm(THREAD);
607 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
608 }
609
610 // Resolve instance field
611 fieldDescriptor fd; // find_field initializes fd if found
612 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
613 // check if field exists; i.e., if a klass containing the field def has been selected
614 if (sel_klass.is_null()){
615 ResourceMark rm(THREAD);
616 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
617 }
618
619 // check access
620 KlassHandle ref_klass(THREAD, pool->pool_holder());
621 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
622
623 // check for errors
624 if (is_static != fd.is_static()) {
625 ResourceMark rm(THREAD);
626 char msg[200];
627 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
628 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
629 }
630
631 // Final fields can only be accessed from its own class.
632 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
633 THROW(vmSymbols::java_lang_IllegalAccessError());
634 }
635
636 // initialize resolved_klass if necessary
637 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
638 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
639 //
640 // note 2: we don't want to force initialization if we are just checking
641 // if the field access is legal; e.g., during compilation
642 if (is_static && !check_only) {
643 sel_klass->initialize(CHECK);
644 }
645
646 {
647 HandleMark hm(THREAD);
648 Handle ref_loader (THREAD, InstanceKlass::cast(ref_klass())->class_loader());
649 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
650 Symbol* signature_ref = pool->signature_ref_at(index);
651 {
652 ResourceMark rm(THREAD);
653 Symbol* failed_type_symbol =
654 SystemDictionary::check_signature_loaders(signature_ref,
655 ref_loader, sel_loader,
656 false,
657 CHECK);
658 if (failed_type_symbol != NULL) {
659 const char* msg = "loader constraint violation: when resolving field"
660 " \"%s\" the class loader (instance of %s) of the referring class, "
661 "%s, and the class loader (instance of %s) for the field's resolved "
662 "type, %s, have different Class objects for that type";
663 char* field_name = field->as_C_string();
664 const char* loader1 = SystemDictionary::loader_name(ref_loader());
665 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
666 const char* loader2 = SystemDictionary::loader_name(sel_loader());
667 char* failed_type_name = failed_type_symbol->as_C_string();
668 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
669 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
670 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
671 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
672 failed_type_name);
673 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
674 }
675 }
676 }
677
678 // return information. note that the klass is set to the actual klass containing the
679 // field, otherwise access of static fields in superclasses will not work.
680 KlassHandle holder (THREAD, fd.field_holder());
681 Symbol* name = fd.name();
682 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
683 }
684
685
686 //------------------------------------------------------------------------------------------------------------------------
687 // Invoke resolution
688 //
689 // Naming conventions:
690 //
691 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
692 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
693 // resolved_klass the specified klass (i.e., specified via constant pool index)
694 // recv_klass the receiver klass
695
696
697 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
698 Symbol* method_signature, KlassHandle current_klass,
699 bool check_access, bool initialize_class, TRAPS) {
700 methodHandle resolved_method;
701 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
702 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
890 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
891 methodHandle resolved_method,
892 KlassHandle resolved_klass,
893 Handle recv,
894 KlassHandle recv_klass,
895 bool check_null_and_abstract,
896 TRAPS) {
897
898 // setup default return values
899 int vtable_index = Method::invalid_vtable_index;
900 methodHandle selected_method;
901
902 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
903
904 // runtime method resolution
905 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
906 THROW(vmSymbols::java_lang_NullPointerException());
907 }
908
909 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
910 // has not been rewritten, and the vtable initialized.
911 assert(resolved_method->method_holder()->is_linked(), "must be linked");
912
913 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
914 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
915 // a missing receiver might result in a bogus lookup.
916 assert(resolved_method->method_holder()->is_linked(), "must be linked");
917
918 // do lookup based on receiver klass using the vtable index
919 if (resolved_method->method_holder()->is_interface()) { // miranda method
920 vtable_index = vtable_index_of_miranda_method(resolved_klass,
921 resolved_method->name(),
922 resolved_method->signature(), CHECK);
923 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
924
925 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
926 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
927 } else {
928 // at this point we are sure that resolved_method is virtual and not
929 // a miranda method; therefore, it must have a valid vtable index.
930 vtable_index = resolved_method->vtable_index();
931 // We could get a negative vtable_index for final methods,
932 // because as an optimization they are they are never put in the vtable,
933 // unless they override an existing method.
934 // If we do get a negative, it means the resolved method is the the selected
935 // method, and it can never be changed by an override.
936 if (vtable_index == Method::nonvirtual_vtable_index) {
937 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
938 selected_method = resolved_method;
939 } else {
940 // recv_klass might be an arrayKlassOop but all vtables start at
941 // the same place. The cast is to avoid virtual call and assertion.
942 InstanceKlass* inst = (InstanceKlass*)recv_klass();
943 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
944 }
945 }
946
947 // check if method exists
948 if (selected_method.is_null()) {
949 ResourceMark rm(THREAD);
950 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
951 Method::name_and_sig_as_C_string(resolved_klass(),
952 resolved_method->name(),
953 resolved_method->signature()));
954 }
955
956 // check if abstract
957 if (check_null_and_abstract && selected_method->is_abstract()) {
958 ResourceMark rm(THREAD);
959 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
960 Method::name_and_sig_as_C_string(resolved_klass(),
961 selected_method->name(),
962 selected_method->signature()));
963 }
964
965 // setup result
989 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
990 // check if receiver exists
991 if (check_null_and_abstract && recv.is_null()) {
992 THROW(vmSymbols::java_lang_NullPointerException());
993 }
994
995 // check if receiver klass implements the resolved interface
996 if (!recv_klass->is_subtype_of(resolved_klass())) {
997 ResourceMark rm(THREAD);
998 char buf[200];
999 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1000 recv_klass()->external_name(),
1001 resolved_klass()->external_name());
1002 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1003 }
1004 // do lookup based on receiver klass
1005 methodHandle sel_method;
1006 lookup_instance_method_in_klasses(sel_method, recv_klass,
1007 resolved_method->name(),
1008 resolved_method->signature(), CHECK);
1009 // check if method exists
1010 if (sel_method.is_null()) {
1011 ResourceMark rm(THREAD);
1012 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1013 Method::name_and_sig_as_C_string(recv_klass(),
1014 resolved_method->name(),
1015 resolved_method->signature()));
1016 }
1017 // check access
1018 if (sel_method->method_holder()->is_interface()) {
1019 // Method holder is an interface. Throw Illegal Access Error if sel_method
1020 // is neither public nor private.
1021 if (!(sel_method->is_public() || sel_method->is_private())) {
1022 ResourceMark rm(THREAD);
1023 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1024 Method::name_and_sig_as_C_string(recv_klass(),
1025 sel_method->name(),
1026 sel_method->signature()));
1027 }
1028 }
1029 else {
1030 // Method holder is a class. Throw Illegal Access Error if sel_method
1031 // is not public.
1032 if (!sel_method->is_public()) {
1033 ResourceMark rm(THREAD);
1034 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1035 Method::name_and_sig_as_C_string(recv_klass(),
1036 sel_method->name(),
1037 sel_method->signature()));
1038 }
1039 }
1040 // check if abstract
1041 if (check_null_and_abstract && sel_method->is_abstract()) {
1042 ResourceMark rm(THREAD);
1043 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1044 Method::name_and_sig_as_C_string(recv_klass(),
1045 sel_method->name(),
1046 sel_method->signature()));
1047 }
1048 // setup result
1049 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
1050 }
1051
1052
1053 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1054 KlassHandle resolved_klass,
1055 Symbol* method_name,
1056 Symbol* method_signature,
1057 KlassHandle current_klass,
1058 bool check_access) {
1059 EXCEPTION_MARK;
1060 methodHandle method_result;
1061 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1062 if (HAS_PENDING_EXCEPTION) {
1063 CLEAR_PENDING_EXCEPTION;
1064 return methodHandle();
1065 } else {
1066 return method_result;
1067 }
1068 }
1069
1325 }
1326 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1327 // throw these guys, since they are already wrapped
1328 return;
1329 }
1330 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1331 // intercept only LinkageErrors which might have failed to wrap
1332 return;
1333 }
1334 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1335 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1336 CLEAR_PENDING_EXCEPTION;
1337 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1338 }
1339 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1340 }
1341
1342 //------------------------------------------------------------------------------------------------------------------------
1343 #ifndef PRODUCT
1344
1345 void FieldAccessInfo::print() {
1346 ResourceMark rm;
1347 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
1348 }
1349
1350 #endif
|
29 #include "compiler/compileBroker.hpp"
30 #include "gc_interface/collectedHeap.inline.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "prims/nativeLookup.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/fieldDescriptor.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/reflection.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/thread.inline.hpp"
47 #include "runtime/vmThread.hpp"
48
49
50 //------------------------------------------------------------------------------------------------------------------------
51 // Implementation of CallInfo
52
53
54 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
55 int vtable_index = Method::nonvirtual_vtable_index;
56 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
57 }
58
59
60 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index, TRAPS) {
61 // This is only called for interface methods. If the resolved_method
62 // comes from java/lang/Object, it can be the subject of a virtual call, so
63 // we should pick the vtable index from the resolved method.
64 // In that case, the caller must call set_virtual instead of set_interface.
65 assert(resolved_method->method_holder()->is_interface(), "");
66 assert(itable_index == resolved_method()->itable_index(), "");
67 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
68 }
69
70 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
71 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
72 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
73 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
74 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
75 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
76 }
77
78 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) {
79 if (resolved_method.is_null()) {
80 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
81 }
82 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
83 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
84 resolved_method->is_compiled_lambda_form(),
85 "linkMethod must return one of these");
86 int vtable_index = Method::nonvirtual_vtable_index;
87 assert(!resolved_method->has_vtable_index(), "");
88 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
89 _resolved_appendix = resolved_appendix;
90 _resolved_method_type = resolved_method_type;
91 }
92
93 void CallInfo::set_common(KlassHandle resolved_klass,
94 KlassHandle selected_klass,
95 methodHandle resolved_method,
96 methodHandle selected_method,
97 CallKind kind,
98 int index,
99 TRAPS) {
100 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
101 _resolved_klass = resolved_klass;
102 _selected_klass = selected_klass;
103 _resolved_method = resolved_method;
104 _selected_method = selected_method;
105 _call_kind = kind;
106 _call_index = index;
107 _resolved_appendix = Handle();
108 DEBUG_ONLY(verify()); // verify before making side effects
109
110 if (CompilationPolicy::must_be_compiled(selected_method)) {
111 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
112
113 // Note: with several active threads, the must_be_compiled may be true
114 // while can_be_compiled is false; remove assert
115 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
116 if (THREAD->is_Compiler_thread()) {
117 // don't force compilation, resolve was on behalf of compiler
118 return;
119 }
120 if (selected_method->method_holder()->is_not_initialized()) {
121 // 'is_not_initialized' means not only '!is_initialized', but also that
122 // initialization has not been started yet ('!being_initialized')
123 // Do not force compilation of methods in uninitialized classes.
124 // Note that doing this would throw an assert later,
125 // in CompileBroker::compile_method.
126 // We sometimes use the link resolver to do reflective lookups
127 // even before classes are initialized.
128 return;
129 }
130 CompileBroker::compile_method(selected_method, InvocationEntryBci,
131 CompilationPolicy::policy()->initial_compile_level(),
132 methodHandle(), 0, "must_be_compiled", CHECK);
133 }
134 }
135
136 // utility query for unreflecting a method
137 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
138 Klass* resolved_method_holder = resolved_method->method_holder();
139 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
140 resolved_klass = resolved_method_holder;
141 }
142 _resolved_klass = resolved_klass;
143 _selected_klass = resolved_klass;
144 _resolved_method = resolved_method;
145 _selected_method = resolved_method;
146 // classify:
147 CallKind kind = CallInfo::unknown_kind;
148 int index = resolved_method->vtable_index();
149 if (resolved_method->can_be_statically_bound()) {
150 kind = CallInfo::direct_call;
151 } else if (!resolved_method_holder->is_interface()) {
152 // Could be an Object method inherited into an interface, but still a vtable call.
153 kind = CallInfo::vtable_call;
154 } else if (!resolved_klass->is_interface()) {
155 // A miranda method. Compute the vtable index.
156 ResourceMark rm;
157 klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
158 index = vt->index_of_miranda(resolved_method->name(),
159 resolved_method->signature());
160 kind = CallInfo::vtable_call;
161 } else {
162 // A regular interface call.
163 kind = CallInfo::itable_call;
164 index = resolved_method->itable_index();
165 }
166 assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index));
167 _call_kind = kind;
168 _call_index = index;
169 _resolved_appendix = Handle();
170 DEBUG_ONLY(verify());
171 }
172
173 #ifdef ASSERT
174 void CallInfo::verify() {
175 switch (call_kind()) { // the meaning and allowed value of index depends on kind
176 case CallInfo::direct_call:
177 if (_call_index == Method::nonvirtual_vtable_index) break;
178 // else fall through to check vtable index:
179 case CallInfo::vtable_call:
180 assert(resolved_klass()->verify_vtable_index(_call_index), "");
181 break;
182 case CallInfo::itable_call:
183 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
184 break;
185 case CallInfo::unknown_kind:
186 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
187 break;
188 default:
189 fatal(err_msg_res("Unexpected call kind %d", call_kind()));
190 }
191 }
192 #endif //ASSERT
193
194
195
196 //------------------------------------------------------------------------------------------------------------------------
197 // Klass resolution
198
199 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
200 if (!Reflection::verify_class_access(ref_klass(),
201 sel_klass(),
202 true)) {
203 ResourceMark rm(THREAD);
204 Exceptions::fthrow(
205 THREAD_AND_LOCATION,
206 vmSymbols::java_lang_IllegalAccessError(),
207 "tried to access class %s from class %s",
208 sel_klass->external_name(),
209 ref_klass->external_name()
210 );
211 return;
212 }
213 }
214
215 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
216 Klass* result_oop = pool->klass_ref_at(index, CHECK);
217 result = KlassHandle(THREAD, result_oop);
218 }
219
220 //------------------------------------------------------------------------------------------------------------------------
221 // Method resolution
222 //
223 // According to JVM spec. $5.4.3c & $5.4.3d
224
225 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
226 Method* result_oop = klass->uncached_lookup_method(name, signature);
227 if (EnableInvokeDynamic && result_oop != NULL) {
228 vmIntrinsics::ID iid = result_oop->intrinsic_id();
229 if (MethodHandles::is_signature_polymorphic(iid)) {
230 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
231 return;
232 }
233 }
234 result = methodHandle(THREAD, result_oop);
235 }
236
237 // returns first instance method
238 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
239 Method* result_oop = klass->uncached_lookup_method(name, signature);
390 resolved_klass(),
391 sel_klass(),
392 flags,
393 true)) {
394 ResourceMark rm(THREAD);
395 Exceptions::fthrow(
396 THREAD_AND_LOCATION,
397 vmSymbols::java_lang_IllegalAccessError(),
398 "tried to access method %s.%s%s from class %s",
399 sel_klass->external_name(),
400 sel_method->name()->as_C_string(),
401 sel_method->signature()->as_C_string(),
402 ref_klass->external_name()
403 );
404 return;
405 }
406 }
407
408 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
409 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
410 // This method is used only in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
411 // and is only used under -Xcomp or -XX:CompileTheWorld.
412 // It appears to fail when applied to an invokeinterface call site.
413 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
414
415 // resolve klass
416 if (code == Bytecodes::_invokedynamic) {
417 resolved_klass = SystemDictionary::MethodHandle_klass();
418 Symbol* method_name = vmSymbols::invoke_name();
419 Symbol* method_signature = pool->signature_ref_at(index);
420 KlassHandle current_klass(THREAD, pool->pool_holder());
421 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
422 return;
423 }
424
425 resolve_klass(resolved_klass, pool, index, CHECK);
426
427 Symbol* method_name = pool->name_ref_at(index);
428 Symbol* method_signature = pool->signature_ref_at(index);
429 KlassHandle current_klass(THREAD, pool->pool_holder());
430
431 if (pool->has_preresolution()
432 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
433 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
614 fieldDescriptor& fd,
615 TRAPS) {
616 if (!Reflection::verify_field_access(ref_klass(),
617 resolved_klass(),
618 sel_klass(),
619 fd.access_flags(),
620 true)) {
621 ResourceMark rm(THREAD);
622 Exceptions::fthrow(
623 THREAD_AND_LOCATION,
624 vmSymbols::java_lang_IllegalAccessError(),
625 "tried to access field %s.%s from class %s",
626 sel_klass->external_name(),
627 fd.name()->as_C_string(),
628 ref_klass->external_name()
629 );
630 return;
631 }
632 }
633
634 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
635 // Load these early in case the resolve of the containing klass fails
636 Symbol* field = pool->name_ref_at(index);
637 Symbol* sig = pool->signature_ref_at(index);
638
639 // resolve specified klass
640 KlassHandle resolved_klass;
641 resolve_klass(resolved_klass, pool, index, CHECK);
642
643 KlassHandle current_klass(THREAD, pool->pool_holder());
644 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
645 }
646
647 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
648 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
649 TRAPS) {
650 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
651 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
652 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
653
654 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
655 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
656
657 // Check if there's a resolved klass containing the field
658 if (resolved_klass.is_null()) {
659 ResourceMark rm(THREAD);
660 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
661 }
662
663 // Resolve instance field
664 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
665 // check if field exists; i.e., if a klass containing the field def has been selected
666 if (sel_klass.is_null()) {
667 ResourceMark rm(THREAD);
668 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
669 }
670
671 if (!check_access)
672 // Access checking may be turned off when calling from within the VM.
673 return;
674
675 // check access
676 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
677
678 // check for errors
679 if (is_static != fd.is_static()) {
680 ResourceMark rm(THREAD);
681 char msg[200];
682 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
683 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
684 }
685
686 // Final fields can only be accessed from its own class.
687 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
688 THROW(vmSymbols::java_lang_IllegalAccessError());
689 }
690
691 // initialize resolved_klass if necessary
692 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
693 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
694 //
695 // note 2: we don't want to force initialization if we are just checking
696 // if the field access is legal; e.g., during compilation
697 if (is_static && initialize_class) {
698 sel_klass->initialize(CHECK);
699 }
700
701 if (sel_klass() != current_klass()) {
702 HandleMark hm(THREAD);
703 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
704 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
705 {
706 ResourceMark rm(THREAD);
707 Symbol* failed_type_symbol =
708 SystemDictionary::check_signature_loaders(sig,
709 ref_loader, sel_loader,
710 false,
711 CHECK);
712 if (failed_type_symbol != NULL) {
713 const char* msg = "loader constraint violation: when resolving field"
714 " \"%s\" the class loader (instance of %s) of the referring class, "
715 "%s, and the class loader (instance of %s) for the field's resolved "
716 "type, %s, have different Class objects for that type";
717 char* field_name = field->as_C_string();
718 const char* loader1 = SystemDictionary::loader_name(ref_loader());
719 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
720 const char* loader2 = SystemDictionary::loader_name(sel_loader());
721 char* failed_type_name = failed_type_symbol->as_C_string();
722 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
723 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
724 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
725 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
726 failed_type_name);
727 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
728 }
729 }
730 }
731
732 // return information. note that the klass is set to the actual klass containing the
733 // field, otherwise access of static fields in superclasses will not work.
734 }
735
736
737 //------------------------------------------------------------------------------------------------------------------------
738 // Invoke resolution
739 //
740 // Naming conventions:
741 //
742 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
743 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
744 // resolved_klass the specified klass (i.e., specified via constant pool index)
745 // recv_klass the receiver klass
746
747
748 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
749 Symbol* method_signature, KlassHandle current_klass,
750 bool check_access, bool initialize_class, TRAPS) {
751 methodHandle resolved_method;
752 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
753 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
941 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
942 methodHandle resolved_method,
943 KlassHandle resolved_klass,
944 Handle recv,
945 KlassHandle recv_klass,
946 bool check_null_and_abstract,
947 TRAPS) {
948
949 // setup default return values
950 int vtable_index = Method::invalid_vtable_index;
951 methodHandle selected_method;
952
953 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
954
955 // runtime method resolution
956 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
957 THROW(vmSymbols::java_lang_NullPointerException());
958 }
959
960 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
961 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
962 // a missing receiver might result in a bogus lookup.
963 assert(resolved_method->method_holder()->is_linked(), "must be linked");
964
965 // do lookup based on receiver klass using the vtable index
966 if (resolved_method->method_holder()->is_interface()) { // miranda method
967 vtable_index = vtable_index_of_miranda_method(resolved_klass,
968 resolved_method->name(),
969 resolved_method->signature(), CHECK);
970
971 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
972
973 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
974 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
975 } else {
976 // at this point we are sure that resolved_method is virtual and not
977 // a miranda method; therefore, it must have a valid vtable index.
978 assert(!resolved_method->has_itable_index(), "");
979 vtable_index = resolved_method->vtable_index();
980 // We could get a negative vtable_index for final methods,
981 // because as an optimization they are they are never put in the vtable,
982 // unless they override an existing method.
983 // If we do get a negative, it means the resolved method is the the selected
984 // method, and it can never be changed by an override.
985 if (vtable_index == Method::nonvirtual_vtable_index) {
986 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
987 selected_method = resolved_method;
988 } else {
989 // recv_klass might be an arrayKlassOop but all vtables start at
990 // the same place. The cast is to avoid virtual call and assertion.
991 InstanceKlass* inst = (InstanceKlass*)recv_klass();
992 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
993 }
994 }
995 if (selected_method.is_null() && !check_null_and_abstract) {
996 selected_method = resolved_method; // use a non-null placeholder
997 }
998
999 // check if method exists
1000 if (selected_method.is_null()) {
1001 ResourceMark rm(THREAD);
1002 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1003 Method::name_and_sig_as_C_string(resolved_klass(),
1004 resolved_method->name(),
1005 resolved_method->signature()));
1006 }
1007
1008 // check if abstract
1009 if (check_null_and_abstract && selected_method->is_abstract()) {
1010 ResourceMark rm(THREAD);
1011 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1012 Method::name_and_sig_as_C_string(resolved_klass(),
1013 selected_method->name(),
1014 selected_method->signature()));
1015 }
1016
1017 // setup result
1041 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
1042 // check if receiver exists
1043 if (check_null_and_abstract && recv.is_null()) {
1044 THROW(vmSymbols::java_lang_NullPointerException());
1045 }
1046
1047 // check if receiver klass implements the resolved interface
1048 if (!recv_klass->is_subtype_of(resolved_klass())) {
1049 ResourceMark rm(THREAD);
1050 char buf[200];
1051 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1052 recv_klass()->external_name(),
1053 resolved_klass()->external_name());
1054 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1055 }
1056 // do lookup based on receiver klass
1057 methodHandle sel_method;
1058 lookup_instance_method_in_klasses(sel_method, recv_klass,
1059 resolved_method->name(),
1060 resolved_method->signature(), CHECK);
1061 if (sel_method.is_null() && !check_null_and_abstract) {
1062 sel_method = resolved_method; // use a non-null placeholder
1063 }
1064 // check if method exists
1065 if (sel_method.is_null()) {
1066 ResourceMark rm(THREAD);
1067 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1068 Method::name_and_sig_as_C_string(recv_klass(),
1069 resolved_method->name(),
1070 resolved_method->signature()));
1071 }
1072 // check access
1073 if (sel_method->method_holder()->is_interface()) {
1074 // Method holder is an interface. Throw Illegal Access Error if sel_method
1075 // is neither public nor private.
1076 if (!(sel_method->is_public() || sel_method->is_private())) {
1077 ResourceMark rm(THREAD);
1078 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1079 Method::name_and_sig_as_C_string(recv_klass(),
1080 sel_method->name(),
1081 sel_method->signature()));
1082 }
1083 }
1084 else {
1085 // Method holder is a class. Throw Illegal Access Error if sel_method
1086 // is not public.
1087 if (!sel_method->is_public()) {
1088 ResourceMark rm(THREAD);
1089 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1090 Method::name_and_sig_as_C_string(recv_klass(),
1091 sel_method->name(),
1092 sel_method->signature()));
1093 }
1094 }
1095 // check if abstract
1096 if (check_null_and_abstract && sel_method->is_abstract()) {
1097 ResourceMark rm(THREAD);
1098 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1099 Method::name_and_sig_as_C_string(recv_klass(),
1100 sel_method->name(),
1101 sel_method->signature()));
1102 }
1103 // setup result
1104 if (!resolved_method->has_itable_index()) {
1105 int vtable_index = resolved_method->vtable_index();
1106 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1107 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1108 return;
1109 }
1110 int itable_index = resolved_method()->itable_index();
1111 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1112 }
1113
1114
1115 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1116 KlassHandle resolved_klass,
1117 Symbol* method_name,
1118 Symbol* method_signature,
1119 KlassHandle current_klass,
1120 bool check_access) {
1121 EXCEPTION_MARK;
1122 methodHandle method_result;
1123 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1124 if (HAS_PENDING_EXCEPTION) {
1125 CLEAR_PENDING_EXCEPTION;
1126 return methodHandle();
1127 } else {
1128 return method_result;
1129 }
1130 }
1131
1387 }
1388 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1389 // throw these guys, since they are already wrapped
1390 return;
1391 }
1392 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1393 // intercept only LinkageErrors which might have failed to wrap
1394 return;
1395 }
1396 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1397 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1398 CLEAR_PENDING_EXCEPTION;
1399 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1400 }
1401 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1402 }
1403
1404 //------------------------------------------------------------------------------------------------------------------------
1405 #ifndef PRODUCT
1406
1407 void CallInfo::print() {
1408 ResourceMark rm;
1409 const char* kindstr = "unknown";
1410 switch (_call_kind) {
1411 case direct_call: kindstr = "direct"; break;
1412 case vtable_call: kindstr = "vtable"; break;
1413 case itable_call: kindstr = "itable"; break;
1414 }
1415 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
1416 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
1417 }
1418
1419 #endif
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