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 != nullptr) {
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 HIDDEN_MEMBER = java_lang_invoke_MemberName::MN_HIDDEN_MEMBER,
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 LM_UNCONDITIONAL = java_lang_invoke_MemberName::MN_UNCONDITIONAL_MODE,
143 LM_MODULE = java_lang_invoke_MemberName::MN_MODULE_MODE,
144 LM_TRUSTED = java_lang_invoke_MemberName::MN_TRUSTED_MODE,
145 ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE
146 };
147
148 int MethodHandles::ref_kind_to_flags(int ref_kind) {
149 assert(ref_kind_is_valid(ref_kind), "%d", ref_kind);
150 int flags = (ref_kind << REFERENCE_KIND_SHIFT);
151 if (ref_kind_is_field(ref_kind)) {
152 flags |= IS_FIELD;
153 } else if (ref_kind_is_method(ref_kind)) {
154 flags |= IS_METHOD;
155 } else if (ref_kind == JVM_REF_newInvokeSpecial) {
156 flags |= IS_CONSTRUCTOR;
157 }
158 return flags;
159 }
160
161 Handle MethodHandles::resolve_MemberName_type(Handle mname, Klass* caller, TRAPS) {
162 Handle empty;
163 Handle type(THREAD, java_lang_invoke_MemberName::type(mname()));
164 if (!java_lang_String::is_instance(type())) {
165 return type; // already resolved
166 }
167 Symbol* signature = java_lang_String::as_symbol_or_null(type());
168 if (signature == nullptr) {
169 return empty; // no such signature exists in the VM
170 }
171 Handle resolved;
172 int flags = java_lang_invoke_MemberName::flags(mname());
173 switch (flags & ALL_KINDS) {
174 case IS_METHOD:
175 case IS_CONSTRUCTOR:
176 resolved = SystemDictionary::find_method_handle_type(signature, caller, CHECK_(empty));
177 break;
178 case IS_FIELD:
179 resolved = SystemDictionary::find_field_handle_type(signature, caller, CHECK_(empty));
180 break;
181 default:
182 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty);
183 }
184 if (resolved.is_null()) {
185 THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad MemberName type", empty);
186 }
187 return resolved;
188 }
189
190 oop MethodHandles::init_MemberName(Handle mname, Handle target, TRAPS) {
191 // This method is used from java.lang.invoke.MemberName constructors.
192 // It fills in the new MemberName from a java.lang.reflect.Member.
193 oop target_oop = target();
194 Klass* target_klass = target_oop->klass();
195 if (target_klass == vmClasses::reflect_Field_klass()) {
297 m_klass = m_klass_non_interface;
298 }
299 if (lt_indy.is_enabled()) {
300 ResourceMark rm;
301 LogStream ls(lt_indy);
302 ls.print_cr("memberName: invokevirtual method_holder::method: %s, receiver: %s, vtableindex: %d, access_flags:",
303 Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()),
304 m_klass->internal_name(), vmindex);
305 m->access_flags().print_on(&ls);
306 if (m->is_default_method()) {
307 ls.print("default");
308 }
309 ls.cr();
310 }
311 break;
312
313 case CallInfo::direct_call:
314 vmindex = Method::nonvirtual_vtable_index;
315 if (m->is_static()) {
316 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT);
317 } else if (m->is_initializer()) {
318 flags |= IS_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
319 } else {
320 // "special" reflects that this is a direct call, not that it
321 // necessarily originates from an invokespecial. We can also do
322 // direct calls for private and/or final non-static methods.
323 flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
324 }
325 break;
326
327 default: assert(false, "bad CallInfo"); return nullptr;
328 }
329
330 // @CallerSensitive annotation detected
331 if (m->caller_sensitive()) {
332 flags |= CALLER_SENSITIVE;
333 }
334
335 Handle resolved_method = info.resolved_method_name();
336 assert(java_lang_invoke_ResolvedMethodName::vmtarget(resolved_method()) == m() || m->is_old(),
337 "Should not change after link resolution");
338
339 oop mname_oop = mname();
340 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
341 java_lang_invoke_MemberName::set_method (mname_oop, resolved_method());
342 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); // vtable/itable index
343 java_lang_invoke_MemberName::set_clazz (mname_oop, m_klass->java_mirror());
344 // Note: name and type can be lazily computed by resolve_MemberName,
345 // if Java code needs them as resolved String and MethodType objects.
346 // If relevant, the vtable or itable value is stored as vmindex.
347 // This is done eagerly, since it is readily available without
348 // constructing any new objects.
349 return mname();
350 }
351
352 oop MethodHandles::init_field_MemberName(Handle mname, fieldDescriptor& fd, bool is_setter) {
353 InstanceKlass* ik = fd.field_holder();
354 int flags = (jushort)( fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS );
355 flags |= IS_FIELD | ((fd.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT);
356 if (fd.is_trusted_final()) flags |= TRUSTED_FINAL;
357 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT);
358 int vmindex = fd.offset(); // determines the field uniquely when combined with static bit
359
360 oop mname_oop = mname();
361 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
362 java_lang_invoke_MemberName::set_method (mname_oop, nullptr);
363 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex);
364 java_lang_invoke_MemberName::set_clazz (mname_oop, ik->java_mirror());
365
366 oop type = field_signature_type_or_null(fd.signature());
367 oop name = field_name_or_null(fd.name());
368 if (name != nullptr)
369 java_lang_invoke_MemberName::set_name(mname_oop, name);
370 if (type != nullptr)
371 java_lang_invoke_MemberName::set_type(mname_oop, type);
372 // Note: name and type can be lazily computed by resolve_MemberName,
373 // if Java code needs them as resolved String and Class objects.
374 // Note that the incoming type oop might be pre-resolved (non-null).
375 // The base clazz and field offset (vmindex) must be eagerly stored,
376 // because they unambiguously identify the field.
787 } else {
788 assert(false, "ref_kind=%d", ref_kind);
789 }
790 if (HAS_PENDING_EXCEPTION) {
791 if (speculative_resolve) {
792 CLEAR_PENDING_EXCEPTION;
793 }
794 return empty;
795 }
796 }
797 if (result.resolved_appendix().not_null()) {
798 // The resolved MemberName must not be accompanied by an appendix argument,
799 // since there is no way to bind this value into the MemberName.
800 // Caller is responsible to prevent this from happening.
801 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty);
802 }
803 result.set_resolved_method_name(CHECK_(empty));
804 oop mname2 = init_method_MemberName(mname, result);
805 return Handle(THREAD, mname2);
806 }
807 case IS_CONSTRUCTOR:
808 {
809 CallInfo result;
810 LinkInfo link_info(defc, name, type, caller, access_check, loader_constraint_check);
811 {
812 assert(!HAS_PENDING_EXCEPTION, "");
813 if (name == vmSymbols::object_initializer_name()) {
814 LinkResolver::resolve_special_call(result, Handle(), link_info, THREAD);
815 } else {
816 break; // will throw after end of switch
817 }
818 if (HAS_PENDING_EXCEPTION) {
819 if (speculative_resolve) {
820 CLEAR_PENDING_EXCEPTION;
821 }
822 return empty;
823 }
824 }
825 assert(result.is_statically_bound(), "");
826 result.set_resolved_method_name(CHECK_(empty));
827 oop mname2 = init_method_MemberName(mname, result);
828 return Handle(THREAD, mname2);
829 }
830 case IS_FIELD:
831 {
832 fieldDescriptor result; // find_field initializes fd if found
833 {
856 // Resolving it plants a vmtarget/vmindex in it,
857 // which refers directly to JVM internals.
858 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) {
859 assert(java_lang_invoke_MemberName::is_instance(mname()), "");
860
861 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != nullptr);
862 bool have_name = (java_lang_invoke_MemberName::name(mname()) != nullptr);
863 bool have_type = (java_lang_invoke_MemberName::type(mname()) != nullptr);
864 int flags = java_lang_invoke_MemberName::flags(mname());
865
866 if (suppress != 0) {
867 if (suppress & _suppress_defc) have_defc = true;
868 if (suppress & _suppress_name) have_name = true;
869 if (suppress & _suppress_type) have_type = true;
870 }
871
872 if (have_defc && have_name && have_type) return; // nothing needed
873
874 switch (flags & ALL_KINDS) {
875 case IS_METHOD:
876 case IS_CONSTRUCTOR:
877 {
878 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
879 if (vmtarget == nullptr) {
880 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand");
881 }
882 methodHandle m(THREAD, vmtarget);
883 DEBUG_ONLY(vmtarget = nullptr); // safety
884 if (!have_defc) {
885 InstanceKlass* defc = m->method_holder();
886 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror());
887 }
888 if (!have_name) {
889 //not java_lang_String::create_from_symbol; let's intern member names
890 oop name = StringTable::intern(m->name(), CHECK);
891 java_lang_invoke_MemberName::set_name(mname(), name);
892 }
893 if (!have_type) {
894 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK);
895 java_lang_invoke_MemberName::set_type(mname(), type());
896 }
978 trace_method_handle(_masm, qname);
979 // LSan appears unable to keep track of qname, ignore it.
980 LSAN_IGNORE_OBJECT(qname);
981 // Note: Don't free the allocated char array because it's used
982 // during runtime.
983 }
984 }
985
986 //
987 // Here are the native methods in java.lang.invoke.MethodHandleNatives
988 // They are the private interface between this JVM and the HotSpot-specific
989 // Java code that implements JSR 292 method handles.
990 //
991 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way
992 // that intrinsic (non-JNI) native methods are defined in HotSpot.
993 //
994
995 #ifndef PRODUCT
996 #define EACH_NAMED_CON(template, requirement) \
997 template(java_lang_invoke_MemberName,MN_IS_METHOD) \
998 template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \
999 template(java_lang_invoke_MemberName,MN_IS_FIELD) \
1000 template(java_lang_invoke_MemberName,MN_IS_TYPE) \
1001 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \
1002 template(java_lang_invoke_MemberName,MN_TRUSTED_FINAL) \
1003 template(java_lang_invoke_MemberName,MN_HIDDEN_MEMBER) \
1004 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \
1005 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \
1006 template(java_lang_invoke_MemberName,MN_NESTMATE_CLASS) \
1007 template(java_lang_invoke_MemberName,MN_HIDDEN_CLASS) \
1008 template(java_lang_invoke_MemberName,MN_STRONG_LOADER_LINK) \
1009 template(java_lang_invoke_MemberName,MN_ACCESS_VM_ANNOTATIONS) \
1010 template(java_lang_invoke_MemberName,MN_MODULE_MODE) \
1011 template(java_lang_invoke_MemberName,MN_UNCONDITIONAL_MODE) \
1012 template(java_lang_invoke_MemberName,MN_TRUSTED_MODE) \
1013 /*end*/
1014
1015 #define IGNORE_REQ(req_expr) /* req_expr */
1016 #define ONE_PLUS(scope,value) 1+
1017 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0;
1018 #define VALUE_COMMA(scope,value) scope::value,
1019 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 };
1020 #define STRING_NULL(scope,value) #value "\0"
1021 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) };
1022
1023 static bool advertise_con_value(int which) {
1121
1122 Klass* caller = caller_jh == nullptr ? nullptr :
1123 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh));
1124 Handle resolved = MethodHandles::resolve_MemberName(mname, caller, lookup_mode,
1125 speculative_resolve == JNI_TRUE,
1126 CHECK_NULL);
1127
1128 if (resolved.is_null()) {
1129 int flags = java_lang_invoke_MemberName::flags(mname());
1130 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
1131 if (!MethodHandles::ref_kind_is_valid(ref_kind)) {
1132 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format");
1133 }
1134 if (speculative_resolve) {
1135 assert(!HAS_PENDING_EXCEPTION, "No exceptions expected when resolving speculatively");
1136 return nullptr;
1137 }
1138 if ((flags & ALL_KINDS) == IS_FIELD) {
1139 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "field resolution failed");
1140 } else if ((flags & ALL_KINDS) == IS_METHOD ||
1141 (flags & ALL_KINDS) == IS_CONSTRUCTOR) {
1142 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "method resolution failed");
1143 } else {
1144 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed");
1145 }
1146 }
1147
1148 return JNIHandles::make_local(THREAD, resolved());
1149 }
1150 JVM_END
1151
1152 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) {
1153 if (mname == nullptr ||
1154 java_lang_invoke_MemberName::clazz(mname) == nullptr) {
1155 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved");
1156 } else {
1157 int flags = java_lang_invoke_MemberName::flags(mname);
1158 if ((flags & IS_FIELD) != 0 &&
1159 (must_be_static
1160 ? (flags & JVM_ACC_STATIC) != 0
1161 : (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 != nullptr) {
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 HIDDEN_MEMBER = java_lang_invoke_MemberName::MN_HIDDEN_MEMBER,
140 FLAT_FIELD = java_lang_invoke_MemberName::MN_FLAT_FIELD,
141 NULL_RESTRICTED = java_lang_invoke_MemberName::MN_NULL_RESTRICTED_FIELD,
142 REFERENCE_KIND_SHIFT = java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT,
143 REFERENCE_KIND_MASK = java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK,
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 == nullptr) {
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 nullptr;
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());
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_flat()) flags |= FLAT_FIELD;
360 if (fd.is_null_free_inline_type()) flags |= NULL_RESTRICTED;
361 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT);
362 int vmindex = fd.offset(); // determines the field uniquely when combined with static bit
363
364 oop mname_oop = mname();
365 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
366 java_lang_invoke_MemberName::set_method (mname_oop, nullptr);
367 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex);
368 java_lang_invoke_MemberName::set_clazz (mname_oop, ik->java_mirror());
369
370 oop type = field_signature_type_or_null(fd.signature());
371 oop name = field_name_or_null(fd.name());
372 if (name != nullptr)
373 java_lang_invoke_MemberName::set_name(mname_oop, name);
374 if (type != nullptr)
375 java_lang_invoke_MemberName::set_type(mname_oop, type);
376 // Note: name and type can be lazily computed by resolve_MemberName,
377 // if Java code needs them as resolved String and Class objects.
378 // Note that the incoming type oop might be pre-resolved (non-null).
379 // The base clazz and field offset (vmindex) must be eagerly stored,
380 // 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_OBJECT_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() && type->is_void_method_signature()) {
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 {
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()) != nullptr);
866 bool have_name = (java_lang_invoke_MemberName::name(mname()) != nullptr);
867 bool have_type = (java_lang_invoke_MemberName::type(mname()) != nullptr);
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_OBJECT_CONSTRUCTOR:
881 {
882 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
883 if (vmtarget == nullptr) {
884 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand");
885 }
886 methodHandle m(THREAD, vmtarget);
887 DEBUG_ONLY(vmtarget = nullptr); // 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 }
982 trace_method_handle(_masm, qname);
983 // LSan appears unable to keep track of qname, ignore it.
984 LSAN_IGNORE_OBJECT(qname);
985 // Note: Don't free the allocated char array because it's used
986 // during runtime.
987 }
988 }
989
990 //
991 // Here are the native methods in java.lang.invoke.MethodHandleNatives
992 // They are the private interface between this JVM and the HotSpot-specific
993 // Java code that implements JSR 292 method handles.
994 //
995 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way
996 // that intrinsic (non-JNI) native methods are defined in HotSpot.
997 //
998
999 #ifndef PRODUCT
1000 #define EACH_NAMED_CON(template, requirement) \
1001 template(java_lang_invoke_MemberName,MN_IS_METHOD) \
1002 template(java_lang_invoke_MemberName,MN_IS_OBJECT_CONSTRUCTOR) \
1003 template(java_lang_invoke_MemberName,MN_IS_FIELD) \
1004 template(java_lang_invoke_MemberName,MN_IS_TYPE) \
1005 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \
1006 template(java_lang_invoke_MemberName,MN_TRUSTED_FINAL) \
1007 template(java_lang_invoke_MemberName,MN_HIDDEN_MEMBER) \
1008 template(java_lang_invoke_MemberName,MN_FLAT_FIELD) \
1009 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \
1010 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \
1011 template(java_lang_invoke_MemberName,MN_NESTMATE_CLASS) \
1012 template(java_lang_invoke_MemberName,MN_HIDDEN_CLASS) \
1013 template(java_lang_invoke_MemberName,MN_STRONG_LOADER_LINK) \
1014 template(java_lang_invoke_MemberName,MN_ACCESS_VM_ANNOTATIONS) \
1015 template(java_lang_invoke_MemberName,MN_MODULE_MODE) \
1016 template(java_lang_invoke_MemberName,MN_UNCONDITIONAL_MODE) \
1017 template(java_lang_invoke_MemberName,MN_TRUSTED_MODE) \
1018 /*end*/
1019
1020 #define IGNORE_REQ(req_expr) /* req_expr */
1021 #define ONE_PLUS(scope,value) 1+
1022 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0;
1023 #define VALUE_COMMA(scope,value) scope::value,
1024 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 };
1025 #define STRING_NULL(scope,value) #value "\0"
1026 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) };
1027
1028 static bool advertise_con_value(int which) {
1126
1127 Klass* caller = caller_jh == nullptr ? nullptr :
1128 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh));
1129 Handle resolved = MethodHandles::resolve_MemberName(mname, caller, lookup_mode,
1130 speculative_resolve == JNI_TRUE,
1131 CHECK_NULL);
1132
1133 if (resolved.is_null()) {
1134 int flags = java_lang_invoke_MemberName::flags(mname());
1135 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
1136 if (!MethodHandles::ref_kind_is_valid(ref_kind)) {
1137 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format");
1138 }
1139 if (speculative_resolve) {
1140 assert(!HAS_PENDING_EXCEPTION, "No exceptions expected when resolving speculatively");
1141 return nullptr;
1142 }
1143 if ((flags & ALL_KINDS) == IS_FIELD) {
1144 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "field resolution failed");
1145 } else if ((flags & ALL_KINDS) == IS_METHOD ||
1146 (flags & ALL_KINDS) == IS_OBJECT_CONSTRUCTOR) {
1147 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "method resolution failed");
1148 } else {
1149 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed");
1150 }
1151 }
1152
1153 return JNIHandles::make_local(THREAD, resolved());
1154 }
1155 JVM_END
1156
1157 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) {
1158 if (mname == nullptr ||
1159 java_lang_invoke_MemberName::clazz(mname) == nullptr) {
1160 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved");
1161 } else {
1162 int flags = java_lang_invoke_MemberName::flags(mname);
1163 if ((flags & IS_FIELD) != 0 &&
1164 (must_be_static
1165 ? (flags & JVM_ACC_STATIC) != 0
1166 : (flags & JVM_ACC_STATIC) == 0)) {
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