113 StubCodeMark mark(this, "MethodHandle::interpreter_entry", vmIntrinsics::name_at(iid));
114 address entry = MethodHandles::generate_method_handle_interpreter_entry(_masm, iid);
115 if (entry != NULL) {
116 Interpreter::set_entry_for_kind(mk, entry);
117 }
118 // If the entry is not set, it will throw AbstractMethodError.
119 }
120 }
121
122 void MethodHandles::set_enabled(bool z) {
123 if (_enabled != z) {
124 guarantee(z, "can only enable once");
125 _enabled = z;
126 }
127 }
128
129 // MemberName support
130
131 // import java_lang_invoke_MemberName.*
132 enum {
133 IS_METHOD = java_lang_invoke_MemberName::MN_IS_METHOD,
134 IS_CONSTRUCTOR = java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR,
135 IS_FIELD = java_lang_invoke_MemberName::MN_IS_FIELD,
136 IS_TYPE = java_lang_invoke_MemberName::MN_IS_TYPE,
137 CALLER_SENSITIVE = java_lang_invoke_MemberName::MN_CALLER_SENSITIVE,
138 TRUSTED_FINAL = java_lang_invoke_MemberName::MN_TRUSTED_FINAL,
139 REFERENCE_KIND_SHIFT = java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT,
140 REFERENCE_KIND_MASK = java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK,
141 SEARCH_SUPERCLASSES = java_lang_invoke_MemberName::MN_SEARCH_SUPERCLASSES,
142 SEARCH_INTERFACES = java_lang_invoke_MemberName::MN_SEARCH_INTERFACES,
143 LM_UNCONDITIONAL = java_lang_invoke_MemberName::MN_UNCONDITIONAL_MODE,
144 LM_MODULE = java_lang_invoke_MemberName::MN_MODULE_MODE,
145 LM_TRUSTED = java_lang_invoke_MemberName::MN_TRUSTED_MODE,
146 ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE
147 };
148
149 int MethodHandles::ref_kind_to_flags(int ref_kind) {
150 assert(ref_kind_is_valid(ref_kind), "%d", ref_kind);
151 int flags = (ref_kind << REFERENCE_KIND_SHIFT);
152 if (ref_kind_is_field(ref_kind)) {
153 flags |= IS_FIELD;
154 } else if (ref_kind_is_method(ref_kind)) {
155 flags |= IS_METHOD;
156 } else if (ref_kind == JVM_REF_newInvokeSpecial) {
157 flags |= IS_CONSTRUCTOR;
158 }
159 return flags;
160 }
161
162 Handle MethodHandles::resolve_MemberName_type(Handle mname, Klass* caller, TRAPS) {
163 Handle empty;
164 Handle type(THREAD, java_lang_invoke_MemberName::type(mname()));
165 if (!java_lang_String::is_instance(type())) {
166 return type; // already resolved
167 }
168 Symbol* signature = java_lang_String::as_symbol_or_null(type());
169 if (signature == NULL) {
170 return empty; // no such signature exists in the VM
171 }
172 Handle resolved;
173 int flags = java_lang_invoke_MemberName::flags(mname());
174 switch (flags & ALL_KINDS) {
175 case IS_METHOD:
176 case IS_CONSTRUCTOR:
177 resolved = SystemDictionary::find_method_handle_type(signature, caller, CHECK_(empty));
178 break;
179 case IS_FIELD:
180 resolved = SystemDictionary::find_field_handle_type(signature, caller, CHECK_(empty));
181 break;
182 default:
183 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty);
184 }
185 if (resolved.is_null()) {
186 THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad MemberName type", empty);
187 }
188 return resolved;
189 }
190
191 oop MethodHandles::init_MemberName(Handle mname, Handle target, TRAPS) {
192 // This method is used from java.lang.invoke.MemberName constructors.
193 // It fills in the new MemberName from a java.lang.reflect.Member.
194 oop target_oop = target();
195 Klass* target_klass = target_oop->klass();
196 if (target_klass == vmClasses::reflect_Field_klass()) {
298 m_klass = m_klass_non_interface;
299 }
300 if (lt_indy.is_enabled()) {
301 ResourceMark rm;
302 LogStream ls(lt_indy);
303 ls.print_cr("memberName: invokevirtual method_holder::method: %s, receiver: %s, vtableindex: %d, access_flags:",
304 Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()),
305 m_klass->internal_name(), vmindex);
306 m->access_flags().print_on(&ls);
307 if (m->is_default_method()) {
308 ls.print("default");
309 }
310 ls.cr();
311 }
312 break;
313
314 case CallInfo::direct_call:
315 vmindex = Method::nonvirtual_vtable_index;
316 if (m->is_static()) {
317 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT);
318 } else if (m->is_initializer()) {
319 flags |= IS_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
320 } else {
321 // "special" reflects that this is a direct call, not that it
322 // necessarily originates from an invokespecial. We can also do
323 // direct calls for private and/or final non-static methods.
324 flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
325 }
326 break;
327
328 default: assert(false, "bad CallInfo"); return NULL;
329 }
330
331 // @CallerSensitive annotation detected
332 if (m->caller_sensitive()) {
333 flags |= CALLER_SENSITIVE;
334 }
335
336 Handle resolved_method = info.resolved_method_name();
337 assert(java_lang_invoke_ResolvedMethodName::vmtarget(resolved_method()) == m() || m->is_old(),
338 "Should not change after link resolution");
339
340 oop mname_oop = mname();
341 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
342 java_lang_invoke_MemberName::set_method (mname_oop, resolved_method());
343 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); // vtable/itable index
344 java_lang_invoke_MemberName::set_clazz (mname_oop, m_klass->java_mirror());
345 // Note: name and type can be lazily computed by resolve_MemberName,
346 // if Java code needs them as resolved String and MethodType objects.
347 // If relevant, the vtable or itable value is stored as vmindex.
348 // This is done eagerly, since it is readily available without
349 // constructing any new objects.
350 return mname();
351 }
352
353 oop MethodHandles::init_field_MemberName(Handle mname, fieldDescriptor& fd, bool is_setter) {
354 InstanceKlass* ik = fd.field_holder();
355 int flags = (jushort)( fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS );
356 flags |= IS_FIELD | ((fd.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT);
357 if (fd.is_trusted_final()) flags |= TRUSTED_FINAL;
358 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT);
359 int vmindex = fd.offset(); // determines the field uniquely when combined with static bit
360
361 oop mname_oop = mname();
362 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
363 java_lang_invoke_MemberName::set_method (mname_oop, NULL);
364 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex);
365 java_lang_invoke_MemberName::set_clazz (mname_oop, ik->java_mirror());
366
367 oop type = field_signature_type_or_null(fd.signature());
368 oop name = field_name_or_null(fd.name());
369 if (name != NULL)
370 java_lang_invoke_MemberName::set_name(mname_oop, name);
371 if (type != NULL)
372 java_lang_invoke_MemberName::set_type(mname_oop, type);
373 // Note: name and type can be lazily computed by resolve_MemberName,
374 // if Java code needs them as resolved String and Class objects.
375 // Note that the incoming type oop might be pre-resolved (non-null).
376 // The base clazz and field offset (vmindex) must be eagerly stored,
377 // because they unambiguously identify the field.
791 } else {
792 assert(false, "ref_kind=%d", ref_kind);
793 }
794 if (HAS_PENDING_EXCEPTION) {
795 if (speculative_resolve) {
796 CLEAR_PENDING_EXCEPTION;
797 }
798 return empty;
799 }
800 }
801 if (result.resolved_appendix().not_null()) {
802 // The resolved MemberName must not be accompanied by an appendix argument,
803 // since there is no way to bind this value into the MemberName.
804 // Caller is responsible to prevent this from happening.
805 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty);
806 }
807 result.set_resolved_method_name(CHECK_(empty));
808 oop mname2 = init_method_MemberName(mname, result);
809 return Handle(THREAD, mname2);
810 }
811 case IS_CONSTRUCTOR:
812 {
813 CallInfo result;
814 LinkInfo link_info(defc, name, type, caller, access_check, loader_constraint_check);
815 {
816 assert(!HAS_PENDING_EXCEPTION, "");
817 if (name == vmSymbols::object_initializer_name()) {
818 LinkResolver::resolve_special_call(result, Handle(), link_info, THREAD);
819 } else {
820 break; // will throw after end of switch
821 }
822 if (HAS_PENDING_EXCEPTION) {
823 if (speculative_resolve) {
824 CLEAR_PENDING_EXCEPTION;
825 }
826 return empty;
827 }
828 }
829 assert(result.is_statically_bound(), "");
830 result.set_resolved_method_name(CHECK_(empty));
831 oop mname2 = init_method_MemberName(mname, result);
832 return Handle(THREAD, mname2);
833 }
834 case IS_FIELD:
835 {
836 fieldDescriptor result; // find_field initializes fd if found
837 {
838 assert(!HAS_PENDING_EXCEPTION, "");
839 LinkInfo link_info(defc, name, type, caller, LinkInfo::AccessCheck::skip, loader_constraint_check);
840 LinkResolver::resolve_field(result, link_info, Bytecodes::_nop, false, THREAD);
860 // Resolving it plants a vmtarget/vmindex in it,
861 // which refers directly to JVM internals.
862 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) {
863 assert(java_lang_invoke_MemberName::is_instance(mname()), "");
864
865 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL);
866 bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL);
867 bool have_type = (java_lang_invoke_MemberName::type(mname()) != NULL);
868 int flags = java_lang_invoke_MemberName::flags(mname());
869
870 if (suppress != 0) {
871 if (suppress & _suppress_defc) have_defc = true;
872 if (suppress & _suppress_name) have_name = true;
873 if (suppress & _suppress_type) have_type = true;
874 }
875
876 if (have_defc && have_name && have_type) return; // nothing needed
877
878 switch (flags & ALL_KINDS) {
879 case IS_METHOD:
880 case IS_CONSTRUCTOR:
881 {
882 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
883 if (vmtarget == NULL) {
884 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand");
885 }
886 methodHandle m(THREAD, vmtarget);
887 DEBUG_ONLY(vmtarget = NULL); // safety
888 if (!have_defc) {
889 InstanceKlass* defc = m->method_holder();
890 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror());
891 }
892 if (!have_name) {
893 //not java_lang_String::create_from_symbol; let's intern member names
894 oop name = StringTable::intern(m->name(), CHECK);
895 java_lang_invoke_MemberName::set_name(mname(), name);
896 }
897 if (!have_type) {
898 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK);
899 java_lang_invoke_MemberName::set_type(mname(), type());
900 }
939 // %%% take caller into account!
940
941 if (k == NULL || !k->is_instance_klass()) return -1;
942
943 int rfill = 0, rlimit = results->length(), rskip = skip;
944 // overflow measurement:
945 int overflow = 0, overflow_limit = MAX2(1000, rlimit);
946
947 int match_flags = mflags;
948 bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0);
949 bool search_intfc = ((match_flags & SEARCH_INTERFACES) != 0);
950 bool local_only = !(search_superc | search_intfc);
951
952 if (name != NULL) {
953 if (name->utf8_length() == 0) return 0; // a match is not possible
954 }
955 if (sig != NULL) {
956 if (sig->starts_with(JVM_SIGNATURE_FUNC))
957 match_flags &= ~(IS_FIELD | IS_TYPE);
958 else
959 match_flags &= ~(IS_CONSTRUCTOR | IS_METHOD);
960 }
961
962 if ((match_flags & IS_TYPE) != 0) {
963 // NYI, and Core Reflection works quite well for this query
964 }
965
966 if ((match_flags & IS_FIELD) != 0) {
967 InstanceKlass* ik = InstanceKlass::cast(k);
968 for (FieldStream st(ik, local_only, !search_intfc); !st.eos(); st.next()) {
969 if (name != NULL && st.name() != name)
970 continue;
971 if (sig != NULL && st.signature() != sig)
972 continue;
973 // passed the filters
974 if (rskip > 0) {
975 --rskip;
976 } else if (rfill < rlimit) {
977 Handle result(THREAD, results->obj_at(rfill++));
978 if (!java_lang_invoke_MemberName::is_instance(result()))
979 return -99; // caller bug!
980 oop saved = MethodHandles::init_field_MemberName(result, st.field_descriptor());
981 if (saved != result())
982 results->obj_at_put(rfill-1, saved); // show saved instance to user
983 } else if (++overflow >= overflow_limit) {
984 match_flags = 0; break; // got tired of looking at overflow
985 }
986 }
987 }
988
989 if ((match_flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) {
990 // watch out for these guys:
991 Symbol* init_name = vmSymbols::object_initializer_name();
992 Symbol* clinit_name = vmSymbols::class_initializer_name();
993 if (name == clinit_name) clinit_name = NULL; // hack for exposing <clinit>
994 bool negate_name_test = false;
995 // fix name so that it captures the intention of IS_CONSTRUCTOR
996 if (!(match_flags & IS_METHOD)) {
997 // constructors only
998 if (name == NULL) {
999 name = init_name;
1000 } else if (name != init_name) {
1001 return 0; // no constructors of this method name
1002 }
1003 } else if (!(match_flags & IS_CONSTRUCTOR)) {
1004 // methods only
1005 if (name == NULL) {
1006 name = init_name;
1007 negate_name_test = true; // if we see the name, we *omit* the entry
1008 } else if (name == init_name) {
1009 return 0; // no methods of this constructor name
1010 }
1011 } else {
1012 // caller will accept either sort; no need to adjust name
1013 }
1014 InstanceKlass* ik = InstanceKlass::cast(k);
1015 for (MethodStream st(ik, local_only, !search_intfc); !st.eos(); st.next()) {
1016 Method* m = st.method();
1017 Symbol* m_name = m->name();
1018 if (m_name == clinit_name)
1019 continue;
1020 if (name != NULL && ((m_name != name) ^ negate_name_test))
1021 continue;
1022 if (sig != NULL && m->signature() != sig)
1023 continue;
1024 // passed the filters
1025 if (rskip > 0) {
1026 --rskip;
1027 } else if (rfill < rlimit) {
1028 Handle result(THREAD, results->obj_at(rfill++));
1029 if (!java_lang_invoke_MemberName::is_instance(result()))
1030 return -99; // caller bug!
1031 CallInfo info(m, NULL, CHECK_0);
1032 oop saved = MethodHandles::init_method_MemberName(result, info);
1033 if (saved != result())
1034 results->obj_at_put(rfill-1, saved); // show saved instance to user
1035 } else if (++overflow >= overflow_limit) {
1036 match_flags = 0; break; // got tired of looking at overflow
1037 }
1038 }
1039 }
1040
1041 // return number of elements we at leasted wanted to initialize
1042 return rfill + overflow;
1043 }
1095 }
1096 jio_snprintf(qname, len, "MethodHandle::interpreter_entry::%s%s", name, suffix);
1097 trace_method_handle(_masm, qname);
1098 // Note: Don't free the allocated char array because it's used
1099 // during runtime.
1100 }
1101 }
1102
1103 //
1104 // Here are the native methods in java.lang.invoke.MethodHandleNatives
1105 // They are the private interface between this JVM and the HotSpot-specific
1106 // Java code that implements JSR 292 method handles.
1107 //
1108 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way
1109 // that intrinsic (non-JNI) native methods are defined in HotSpot.
1110 //
1111
1112 #ifndef PRODUCT
1113 #define EACH_NAMED_CON(template, requirement) \
1114 template(java_lang_invoke_MemberName,MN_IS_METHOD) \
1115 template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \
1116 template(java_lang_invoke_MemberName,MN_IS_FIELD) \
1117 template(java_lang_invoke_MemberName,MN_IS_TYPE) \
1118 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \
1119 template(java_lang_invoke_MemberName,MN_TRUSTED_FINAL) \
1120 template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \
1121 template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \
1122 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \
1123 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \
1124 template(java_lang_invoke_MemberName,MN_NESTMATE_CLASS) \
1125 template(java_lang_invoke_MemberName,MN_HIDDEN_CLASS) \
1126 template(java_lang_invoke_MemberName,MN_STRONG_LOADER_LINK) \
1127 template(java_lang_invoke_MemberName,MN_ACCESS_VM_ANNOTATIONS) \
1128 template(java_lang_invoke_MemberName,MN_MODULE_MODE) \
1129 template(java_lang_invoke_MemberName,MN_UNCONDITIONAL_MODE) \
1130 template(java_lang_invoke_MemberName,MN_TRUSTED_MODE) \
1131 /*end*/
1132
1133 #define IGNORE_REQ(req_expr) /* req_expr */
1134 #define ONE_PLUS(scope,value) 1+
1135 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0;
1136 #define VALUE_COMMA(scope,value) scope::value,
1137 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 };
1138 #define STRING_NULL(scope,value) #value "\0"
1139 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) };
1239
1240 Klass* caller = caller_jh == NULL ? NULL :
1241 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh));
1242 Handle resolved = MethodHandles::resolve_MemberName(mname, caller, lookup_mode,
1243 speculative_resolve == JNI_TRUE,
1244 CHECK_NULL);
1245
1246 if (resolved.is_null()) {
1247 int flags = java_lang_invoke_MemberName::flags(mname());
1248 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
1249 if (!MethodHandles::ref_kind_is_valid(ref_kind)) {
1250 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format");
1251 }
1252 if (speculative_resolve) {
1253 assert(!HAS_PENDING_EXCEPTION, "No exceptions expected when resolving speculatively");
1254 return NULL;
1255 }
1256 if ((flags & ALL_KINDS) == IS_FIELD) {
1257 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "field resolution failed");
1258 } else if ((flags & ALL_KINDS) == IS_METHOD ||
1259 (flags & ALL_KINDS) == IS_CONSTRUCTOR) {
1260 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "method resolution failed");
1261 } else {
1262 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed");
1263 }
1264 }
1265
1266 return JNIHandles::make_local(THREAD, resolved());
1267 }
1268 JVM_END
1269
1270 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) {
1271 if (mname == NULL ||
1272 java_lang_invoke_MemberName::clazz(mname) == NULL) {
1273 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved");
1274 } else {
1275 int flags = java_lang_invoke_MemberName::flags(mname);
1276 if ((flags & IS_FIELD) != 0 &&
1277 (must_be_static
1278 ? (flags & JVM_ACC_STATIC) != 0
1279 : (flags & JVM_ACC_STATIC) == 0)) {
|
113 StubCodeMark mark(this, "MethodHandle::interpreter_entry", vmIntrinsics::name_at(iid));
114 address entry = MethodHandles::generate_method_handle_interpreter_entry(_masm, iid);
115 if (entry != NULL) {
116 Interpreter::set_entry_for_kind(mk, entry);
117 }
118 // If the entry is not set, it will throw AbstractMethodError.
119 }
120 }
121
122 void MethodHandles::set_enabled(bool z) {
123 if (_enabled != z) {
124 guarantee(z, "can only enable once");
125 _enabled = z;
126 }
127 }
128
129 // MemberName support
130
131 // import java_lang_invoke_MemberName.*
132 enum {
133 IS_METHOD = java_lang_invoke_MemberName::MN_IS_METHOD,
134 IS_OBJECT_CONSTRUCTOR = java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR,
135 IS_FIELD = java_lang_invoke_MemberName::MN_IS_FIELD,
136 IS_TYPE = java_lang_invoke_MemberName::MN_IS_TYPE,
137 CALLER_SENSITIVE = java_lang_invoke_MemberName::MN_CALLER_SENSITIVE,
138 TRUSTED_FINAL = java_lang_invoke_MemberName::MN_TRUSTED_FINAL,
139 FLATTENED = java_lang_invoke_MemberName::MN_FLATTENED,
140 REFERENCE_KIND_SHIFT = java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT,
141 REFERENCE_KIND_MASK = java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK,
142 SEARCH_SUPERCLASSES = java_lang_invoke_MemberName::MN_SEARCH_SUPERCLASSES,
143 SEARCH_INTERFACES = java_lang_invoke_MemberName::MN_SEARCH_INTERFACES,
144 LM_UNCONDITIONAL = java_lang_invoke_MemberName::MN_UNCONDITIONAL_MODE,
145 LM_MODULE = java_lang_invoke_MemberName::MN_MODULE_MODE,
146 LM_TRUSTED = java_lang_invoke_MemberName::MN_TRUSTED_MODE,
147 ALL_KINDS = IS_METHOD | IS_OBJECT_CONSTRUCTOR | IS_FIELD | IS_TYPE
148 };
149
150 int MethodHandles::ref_kind_to_flags(int ref_kind) {
151 assert(ref_kind_is_valid(ref_kind), "%d", ref_kind);
152 int flags = (ref_kind << REFERENCE_KIND_SHIFT);
153 if (ref_kind_is_field(ref_kind)) {
154 flags |= IS_FIELD;
155 } else if (ref_kind_is_method(ref_kind)) {
156 flags |= IS_METHOD;
157 } else if (ref_kind == JVM_REF_newInvokeSpecial) {
158 flags |= IS_OBJECT_CONSTRUCTOR;
159 }
160 return flags;
161 }
162
163 Handle MethodHandles::resolve_MemberName_type(Handle mname, Klass* caller, TRAPS) {
164 Handle empty;
165 Handle type(THREAD, java_lang_invoke_MemberName::type(mname()));
166 if (!java_lang_String::is_instance(type())) {
167 return type; // already resolved
168 }
169 Symbol* signature = java_lang_String::as_symbol_or_null(type());
170 if (signature == NULL) {
171 return empty; // no such signature exists in the VM
172 }
173 Handle resolved;
174 int flags = java_lang_invoke_MemberName::flags(mname());
175 switch (flags & ALL_KINDS) {
176 case IS_METHOD:
177 case IS_OBJECT_CONSTRUCTOR:
178 resolved = SystemDictionary::find_method_handle_type(signature, caller, CHECK_(empty));
179 break;
180 case IS_FIELD:
181 resolved = SystemDictionary::find_field_handle_type(signature, caller, CHECK_(empty));
182 break;
183 default:
184 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty);
185 }
186 if (resolved.is_null()) {
187 THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad MemberName type", empty);
188 }
189 return resolved;
190 }
191
192 oop MethodHandles::init_MemberName(Handle mname, Handle target, TRAPS) {
193 // This method is used from java.lang.invoke.MemberName constructors.
194 // It fills in the new MemberName from a java.lang.reflect.Member.
195 oop target_oop = target();
196 Klass* target_klass = target_oop->klass();
197 if (target_klass == vmClasses::reflect_Field_klass()) {
299 m_klass = m_klass_non_interface;
300 }
301 if (lt_indy.is_enabled()) {
302 ResourceMark rm;
303 LogStream ls(lt_indy);
304 ls.print_cr("memberName: invokevirtual method_holder::method: %s, receiver: %s, vtableindex: %d, access_flags:",
305 Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()),
306 m_klass->internal_name(), vmindex);
307 m->access_flags().print_on(&ls);
308 if (m->is_default_method()) {
309 ls.print("default");
310 }
311 ls.cr();
312 }
313 break;
314
315 case CallInfo::direct_call:
316 vmindex = Method::nonvirtual_vtable_index;
317 if (m->is_static()) {
318 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT);
319 } else if (m->is_object_constructor()) {
320 flags |= IS_OBJECT_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
321 } else {
322 // "special" reflects that this is a direct call, not that it
323 // necessarily originates from an invokespecial. We can also do
324 // direct calls for private and/or final non-static methods.
325 flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
326 }
327 break;
328
329 default: assert(false, "bad CallInfo"); return NULL;
330 }
331
332 // @CallerSensitive annotation detected
333 if (m->caller_sensitive()) {
334 flags |= CALLER_SENSITIVE;
335 }
336
337 Handle resolved_method = info.resolved_method_name();
338 assert(java_lang_invoke_ResolvedMethodName::vmtarget(resolved_method()) == m() || m->is_old(),
339 "Should not change after link resolution");
340
341 oop mname_oop = mname();
342 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
343 java_lang_invoke_MemberName::set_method (mname_oop, resolved_method());
344 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); // vtable/itable index
345 java_lang_invoke_MemberName::set_clazz (mname_oop, m_klass->java_mirror());
346 // Note: name and type can be lazily computed by resolve_MemberName,
347 // if Java code needs them as resolved String and MethodType objects.
348 // If relevant, the vtable or itable value is stored as vmindex.
349 // This is done eagerly, since it is readily available without
350 // constructing any new objects.
351 return mname();
352 }
353
354 oop MethodHandles::init_field_MemberName(Handle mname, fieldDescriptor& fd, bool is_setter) {
355 InstanceKlass* ik = fd.field_holder();
356 int flags = (jushort)( fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS );
357 flags |= IS_FIELD | ((fd.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT);
358 if (fd.is_trusted_final()) flags |= TRUSTED_FINAL;
359 if (fd.is_inlined()) flags |= FLATTENED;;
360 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT);
361 int vmindex = fd.offset(); // determines the field uniquely when combined with static bit
362
363 oop mname_oop = mname();
364 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
365 java_lang_invoke_MemberName::set_method (mname_oop, NULL);
366 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex);
367 java_lang_invoke_MemberName::set_clazz (mname_oop, ik->java_mirror());
368
369 oop type = field_signature_type_or_null(fd.signature());
370 oop name = field_name_or_null(fd.name());
371 if (name != NULL)
372 java_lang_invoke_MemberName::set_name(mname_oop, name);
373 if (type != NULL)
374 java_lang_invoke_MemberName::set_type(mname_oop, type);
375 // Note: name and type can be lazily computed by resolve_MemberName,
376 // if Java code needs them as resolved String and Class objects.
377 // Note that the incoming type oop might be pre-resolved (non-null).
378 // The base clazz and field offset (vmindex) must be eagerly stored,
379 // because they unambiguously identify the field.
793 } else {
794 assert(false, "ref_kind=%d", ref_kind);
795 }
796 if (HAS_PENDING_EXCEPTION) {
797 if (speculative_resolve) {
798 CLEAR_PENDING_EXCEPTION;
799 }
800 return empty;
801 }
802 }
803 if (result.resolved_appendix().not_null()) {
804 // The resolved MemberName must not be accompanied by an appendix argument,
805 // since there is no way to bind this value into the MemberName.
806 // Caller is responsible to prevent this from happening.
807 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty);
808 }
809 result.set_resolved_method_name(CHECK_(empty));
810 oop mname2 = init_method_MemberName(mname, result);
811 return Handle(THREAD, mname2);
812 }
813 case IS_OBJECT_CONSTRUCTOR:
814 {
815 CallInfo result;
816 LinkInfo link_info(defc, name, type, caller, access_check, loader_constraint_check);
817 {
818 assert(!HAS_PENDING_EXCEPTION, "");
819 if (name != vmSymbols::object_initializer_name()) {
820 break; // will throw after end of switch
821 } else if (type->is_void_method_signature()) {
822 LinkResolver::resolve_special_call(result, Handle(), link_info, THREAD);
823 } else {
824 // LinkageError unless it returns something reasonable
825 LinkResolver::resolve_static_call(result, link_info, false, THREAD);
826 }
827 if (HAS_PENDING_EXCEPTION) {
828 if (speculative_resolve) {
829 CLEAR_PENDING_EXCEPTION;
830 }
831 return empty;
832 }
833 }
834 assert(result.is_statically_bound(), "");
835 result.set_resolved_method_name(CHECK_(empty));
836 oop mname2 = init_method_MemberName(mname, result);
837 return Handle(THREAD, mname2);
838 }
839 case IS_FIELD:
840 {
841 fieldDescriptor result; // find_field initializes fd if found
842 {
843 assert(!HAS_PENDING_EXCEPTION, "");
844 LinkInfo link_info(defc, name, type, caller, LinkInfo::AccessCheck::skip, loader_constraint_check);
845 LinkResolver::resolve_field(result, link_info, Bytecodes::_nop, false, THREAD);
865 // Resolving it plants a vmtarget/vmindex in it,
866 // which refers directly to JVM internals.
867 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) {
868 assert(java_lang_invoke_MemberName::is_instance(mname()), "");
869
870 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL);
871 bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL);
872 bool have_type = (java_lang_invoke_MemberName::type(mname()) != NULL);
873 int flags = java_lang_invoke_MemberName::flags(mname());
874
875 if (suppress != 0) {
876 if (suppress & _suppress_defc) have_defc = true;
877 if (suppress & _suppress_name) have_name = true;
878 if (suppress & _suppress_type) have_type = true;
879 }
880
881 if (have_defc && have_name && have_type) return; // nothing needed
882
883 switch (flags & ALL_KINDS) {
884 case IS_METHOD:
885 case IS_OBJECT_CONSTRUCTOR:
886 {
887 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
888 if (vmtarget == NULL) {
889 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand");
890 }
891 methodHandle m(THREAD, vmtarget);
892 DEBUG_ONLY(vmtarget = NULL); // safety
893 if (!have_defc) {
894 InstanceKlass* defc = m->method_holder();
895 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror());
896 }
897 if (!have_name) {
898 //not java_lang_String::create_from_symbol; let's intern member names
899 oop name = StringTable::intern(m->name(), CHECK);
900 java_lang_invoke_MemberName::set_name(mname(), name);
901 }
902 if (!have_type) {
903 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK);
904 java_lang_invoke_MemberName::set_type(mname(), type());
905 }
944 // %%% take caller into account!
945
946 if (k == NULL || !k->is_instance_klass()) return -1;
947
948 int rfill = 0, rlimit = results->length(), rskip = skip;
949 // overflow measurement:
950 int overflow = 0, overflow_limit = MAX2(1000, rlimit);
951
952 int match_flags = mflags;
953 bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0);
954 bool search_intfc = ((match_flags & SEARCH_INTERFACES) != 0);
955 bool local_only = !(search_superc | search_intfc);
956
957 if (name != NULL) {
958 if (name->utf8_length() == 0) return 0; // a match is not possible
959 }
960 if (sig != NULL) {
961 if (sig->starts_with(JVM_SIGNATURE_FUNC))
962 match_flags &= ~(IS_FIELD | IS_TYPE);
963 else
964 match_flags &= ~(IS_OBJECT_CONSTRUCTOR | IS_METHOD);
965 }
966
967 if ((match_flags & IS_TYPE) != 0) {
968 // NYI, and Core Reflection works quite well for this query
969 }
970
971 if ((match_flags & IS_FIELD) != 0) {
972 InstanceKlass* ik = InstanceKlass::cast(k);
973 for (FieldStream st(ik, local_only, !search_intfc); !st.eos(); st.next()) {
974 if (name != NULL && st.name() != name)
975 continue;
976 if (sig != NULL && st.signature() != sig)
977 continue;
978 // passed the filters
979 if (rskip > 0) {
980 --rskip;
981 } else if (rfill < rlimit) {
982 Handle result(THREAD, results->obj_at(rfill++));
983 if (!java_lang_invoke_MemberName::is_instance(result()))
984 return -99; // caller bug!
985 oop saved = MethodHandles::init_field_MemberName(result, st.field_descriptor());
986 if (saved != result())
987 results->obj_at_put(rfill-1, saved); // show saved instance to user
988 } else if (++overflow >= overflow_limit) {
989 match_flags = 0; break; // got tired of looking at overflow
990 }
991 }
992 }
993
994 if ((match_flags & (IS_METHOD | IS_OBJECT_CONSTRUCTOR)) != 0) {
995 // watch out for these guys:
996 Symbol* init_name = vmSymbols::object_initializer_name();
997 Symbol* clinit_name = vmSymbols::class_initializer_name();
998 if (name == clinit_name) clinit_name = NULL; // hack for exposing <clinit>
999 bool ctor_ok = true, sfac_ok = true;
1000 // fix name so that it captures the intention of IS_OBJECT_CONSTRUCTOR
1001 if (!(match_flags & IS_METHOD)) {
1002 // constructors only
1003 if (name == NULL) {
1004 name = init_name;
1005 } else if (name != init_name) {
1006 return 0; // no constructors of this method name
1007 }
1008 sfac_ok = false;
1009 } else if (!(match_flags & IS_OBJECT_CONSTRUCTOR)) {
1010 // methods only
1011 ctor_ok = false; // but sfac_ok is true, so we might find <init>
1012 } else {
1013 // caller will accept either sort; no need to adjust name
1014 }
1015 InstanceKlass* ik = InstanceKlass::cast(k);
1016 for (MethodStream st(ik, local_only, !search_intfc); !st.eos(); st.next()) {
1017 Method* m = st.method();
1018 Symbol* m_name = m->name();
1019 if (m_name == clinit_name)
1020 continue;
1021 if (name != NULL && m_name != name)
1022 continue;
1023 if (sig != NULL && m->signature() != sig)
1024 continue;
1025 if (m_name == init_name) { // might be either ctor or sfac
1026 if (m->is_object_constructor() && !ctor_ok) continue;
1027 if (m->is_static_init_factory() && !sfac_ok) continue;
1028 }
1029 // passed the filters
1030 if (rskip > 0) {
1031 --rskip;
1032 } else if (rfill < rlimit) {
1033 Handle result(THREAD, results->obj_at(rfill++));
1034 if (!java_lang_invoke_MemberName::is_instance(result()))
1035 return -99; // caller bug!
1036 CallInfo info(m, NULL, CHECK_0);
1037 oop saved = MethodHandles::init_method_MemberName(result, info);
1038 if (saved != result())
1039 results->obj_at_put(rfill-1, saved); // show saved instance to user
1040 } else if (++overflow >= overflow_limit) {
1041 match_flags = 0; break; // got tired of looking at overflow
1042 }
1043 }
1044 }
1045
1046 // return number of elements we at leasted wanted to initialize
1047 return rfill + overflow;
1048 }
1100 }
1101 jio_snprintf(qname, len, "MethodHandle::interpreter_entry::%s%s", name, suffix);
1102 trace_method_handle(_masm, qname);
1103 // Note: Don't free the allocated char array because it's used
1104 // during runtime.
1105 }
1106 }
1107
1108 //
1109 // Here are the native methods in java.lang.invoke.MethodHandleNatives
1110 // They are the private interface between this JVM and the HotSpot-specific
1111 // Java code that implements JSR 292 method handles.
1112 //
1113 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way
1114 // that intrinsic (non-JNI) native methods are defined in HotSpot.
1115 //
1116
1117 #ifndef PRODUCT
1118 #define EACH_NAMED_CON(template, requirement) \
1119 template(java_lang_invoke_MemberName,MN_IS_METHOD) \
1120 template(java_lang_invoke_MemberName,MN_IS_OBJECT_CONSTRUCTOR) \
1121 template(java_lang_invoke_MemberName,MN_IS_FIELD) \
1122 template(java_lang_invoke_MemberName,MN_IS_TYPE) \
1123 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \
1124 template(java_lang_invoke_MemberName,MN_TRUSTED_FINAL) \
1125 template(java_lang_invoke_MemberName,MN_FLATTENED) \
1126 template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \
1127 template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \
1128 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \
1129 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \
1130 template(java_lang_invoke_MemberName,MN_NESTMATE_CLASS) \
1131 template(java_lang_invoke_MemberName,MN_HIDDEN_CLASS) \
1132 template(java_lang_invoke_MemberName,MN_STRONG_LOADER_LINK) \
1133 template(java_lang_invoke_MemberName,MN_ACCESS_VM_ANNOTATIONS) \
1134 template(java_lang_invoke_MemberName,MN_MODULE_MODE) \
1135 template(java_lang_invoke_MemberName,MN_UNCONDITIONAL_MODE) \
1136 template(java_lang_invoke_MemberName,MN_TRUSTED_MODE) \
1137 /*end*/
1138
1139 #define IGNORE_REQ(req_expr) /* req_expr */
1140 #define ONE_PLUS(scope,value) 1+
1141 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0;
1142 #define VALUE_COMMA(scope,value) scope::value,
1143 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 };
1144 #define STRING_NULL(scope,value) #value "\0"
1145 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) };
1245
1246 Klass* caller = caller_jh == NULL ? NULL :
1247 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh));
1248 Handle resolved = MethodHandles::resolve_MemberName(mname, caller, lookup_mode,
1249 speculative_resolve == JNI_TRUE,
1250 CHECK_NULL);
1251
1252 if (resolved.is_null()) {
1253 int flags = java_lang_invoke_MemberName::flags(mname());
1254 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
1255 if (!MethodHandles::ref_kind_is_valid(ref_kind)) {
1256 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format");
1257 }
1258 if (speculative_resolve) {
1259 assert(!HAS_PENDING_EXCEPTION, "No exceptions expected when resolving speculatively");
1260 return NULL;
1261 }
1262 if ((flags & ALL_KINDS) == IS_FIELD) {
1263 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "field resolution failed");
1264 } else if ((flags & ALL_KINDS) == IS_METHOD ||
1265 (flags & ALL_KINDS) == IS_OBJECT_CONSTRUCTOR) {
1266 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "method resolution failed");
1267 } else {
1268 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed");
1269 }
1270 }
1271
1272 return JNIHandles::make_local(THREAD, resolved());
1273 }
1274 JVM_END
1275
1276 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) {
1277 if (mname == NULL ||
1278 java_lang_invoke_MemberName::clazz(mname) == NULL) {
1279 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved");
1280 } else {
1281 int flags = java_lang_invoke_MemberName::flags(mname);
1282 if ((flags & IS_FIELD) != 0 &&
1283 (must_be_static
1284 ? (flags & JVM_ACC_STATIC) != 0
1285 : (flags & JVM_ACC_STATIC) == 0)) {
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