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()) {
296 assert(info.resolved_klass()->is_subtype_of(m_klass_non_interface), "virtual call must be type-safe");
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 assert(!m->is_static_initializer(), "Cannot be static initializer");
317 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT);
318 } else if (m->is_object_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 nullptr;
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, nullptr);
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 != nullptr)
370 java_lang_invoke_MemberName::set_name(mname_oop, name);
371 if (type != nullptr)
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.
788 } else {
789 assert(false, "ref_kind=%d", ref_kind);
790 }
791 if (HAS_PENDING_EXCEPTION) {
792 if (speculative_resolve) {
793 CLEAR_PENDING_EXCEPTION;
794 }
795 return empty;
796 }
797 }
798 if (result.resolved_appendix().not_null()) {
799 // The resolved MemberName must not be accompanied by an appendix argument,
800 // since there is no way to bind this value into the MemberName.
801 // Caller is responsible to prevent this from happening.
802 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty);
803 }
804 result.set_resolved_method_name(CHECK_(empty));
805 oop mname2 = init_method_MemberName(mname, result);
806 return Handle(THREAD, mname2);
807 }
808 case IS_CONSTRUCTOR:
809 {
810 CallInfo result;
811 LinkInfo link_info(defc, name, type, caller, access_check, loader_constraint_check);
812 {
813 assert(!HAS_PENDING_EXCEPTION, "");
814 if (name == vmSymbols::object_initializer_name()) {
815 LinkResolver::resolve_special_call(result, Handle(), link_info, THREAD);
816 } else {
817 break; // will throw after end of switch
818 }
819 if (HAS_PENDING_EXCEPTION) {
820 if (speculative_resolve) {
821 CLEAR_PENDING_EXCEPTION;
822 }
823 return empty;
824 }
825 }
826 assert(result.is_statically_bound(), "");
827 result.set_resolved_method_name(CHECK_(empty));
828 oop mname2 = init_method_MemberName(mname, result);
829 return Handle(THREAD, mname2);
830 }
831 case IS_FIELD:
832 {
833 fieldDescriptor result; // find_field initializes fd if found
834 {
857 // Resolving it plants a vmtarget/vmindex in it,
858 // which refers directly to JVM internals.
859 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) {
860 assert(java_lang_invoke_MemberName::is_instance(mname()), "");
861
862 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != nullptr);
863 bool have_name = (java_lang_invoke_MemberName::name(mname()) != nullptr);
864 bool have_type = (java_lang_invoke_MemberName::type(mname()) != nullptr);
865 int flags = java_lang_invoke_MemberName::flags(mname());
866
867 if (suppress != 0) {
868 if (suppress & _suppress_defc) have_defc = true;
869 if (suppress & _suppress_name) have_name = true;
870 if (suppress & _suppress_type) have_type = true;
871 }
872
873 if (have_defc && have_name && have_type) return; // nothing needed
874
875 switch (flags & ALL_KINDS) {
876 case IS_METHOD:
877 case IS_CONSTRUCTOR:
878 {
879 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
880 if (vmtarget == nullptr) {
881 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand");
882 }
883 methodHandle m(THREAD, vmtarget);
884 DEBUG_ONLY(vmtarget = nullptr); // safety
885 if (!have_defc) {
886 InstanceKlass* defc = m->method_holder();
887 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror());
888 }
889 if (!have_name) {
890 //not java_lang_String::create_from_symbol; let's intern member names
891 oop name = StringTable::intern(m->name(), CHECK);
892 java_lang_invoke_MemberName::set_name(mname(), name);
893 }
894 if (!have_type) {
895 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK);
896 java_lang_invoke_MemberName::set_type(mname(), type());
897 }
979 trace_method_handle(_masm, qname);
980 // LSan appears unable to keep track of qname, ignore it.
981 LSAN_IGNORE_OBJECT(qname);
982 // Note: Don't free the allocated char array because it's used
983 // during runtime.
984 }
985 }
986
987 //
988 // Here are the native methods in java.lang.invoke.MethodHandleNatives
989 // They are the private interface between this JVM and the HotSpot-specific
990 // Java code that implements JSR 292 method handles.
991 //
992 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way
993 // that intrinsic (non-JNI) native methods are defined in HotSpot.
994 //
995
996 #ifndef PRODUCT
997 #define EACH_NAMED_CON(template, requirement) \
998 template(java_lang_invoke_MemberName,MN_IS_METHOD) \
999 template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \
1000 template(java_lang_invoke_MemberName,MN_IS_FIELD) \
1001 template(java_lang_invoke_MemberName,MN_IS_TYPE) \
1002 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \
1003 template(java_lang_invoke_MemberName,MN_TRUSTED_FINAL) \
1004 template(java_lang_invoke_MemberName,MN_HIDDEN_MEMBER) \
1005 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \
1006 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \
1007 template(java_lang_invoke_MemberName,MN_NESTMATE_CLASS) \
1008 template(java_lang_invoke_MemberName,MN_HIDDEN_CLASS) \
1009 template(java_lang_invoke_MemberName,MN_STRONG_LOADER_LINK) \
1010 template(java_lang_invoke_MemberName,MN_ACCESS_VM_ANNOTATIONS) \
1011 template(java_lang_invoke_MemberName,MN_MODULE_MODE) \
1012 template(java_lang_invoke_MemberName,MN_UNCONDITIONAL_MODE) \
1013 template(java_lang_invoke_MemberName,MN_TRUSTED_MODE) \
1014 /*end*/
1015
1016 #define IGNORE_REQ(req_expr) /* req_expr */
1017 #define ONE_PLUS(scope,value) 1+
1018 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0;
1019 #define VALUE_COMMA(scope,value) scope::value,
1020 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 };
1021 #define STRING_NULL(scope,value) #value "\0"
1022 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) };
1023
1024 static bool advertise_con_value(int which) {
1122
1123 Klass* caller = caller_jh == nullptr ? nullptr :
1124 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh));
1125 Handle resolved = MethodHandles::resolve_MemberName(mname, caller, lookup_mode,
1126 speculative_resolve == JNI_TRUE,
1127 CHECK_NULL);
1128
1129 if (resolved.is_null()) {
1130 int flags = java_lang_invoke_MemberName::flags(mname());
1131 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
1132 if (!MethodHandles::ref_kind_is_valid(ref_kind)) {
1133 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format");
1134 }
1135 if (speculative_resolve) {
1136 assert(!HAS_PENDING_EXCEPTION, "No exceptions expected when resolving speculatively");
1137 return nullptr;
1138 }
1139 if ((flags & ALL_KINDS) == IS_FIELD) {
1140 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "field resolution failed");
1141 } else if ((flags & ALL_KINDS) == IS_METHOD ||
1142 (flags & ALL_KINDS) == IS_CONSTRUCTOR) {
1143 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "method resolution failed");
1144 } else {
1145 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed");
1146 }
1147 }
1148
1149 return JNIHandles::make_local(THREAD, resolved());
1150 }
1151 JVM_END
1152
1153 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) {
1154 if (mname == nullptr ||
1155 java_lang_invoke_MemberName::clazz(mname) == nullptr) {
1156 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved");
1157 } else {
1158 int flags = java_lang_invoke_MemberName::flags(mname);
1159 if ((flags & IS_FIELD) != 0 &&
1160 (must_be_static
1161 ? (flags & JVM_ACC_STATIC) != 0
1162 : (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()) {
298 assert(info.resolved_klass()->is_subtype_of(m_klass_non_interface), "virtual call must be type-safe");
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 assert(!m->is_class_initializer(), "Cannot be static initializer");
319 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT);
320 } else if (m->is_object_constructor()) {
321 flags |= IS_OBJECT_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
322 } else {
323 // "special" reflects that this is a direct call, not that it
324 // necessarily originates from an invokespecial. We can also do
325 // direct calls for private and/or final non-static methods.
326 flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT);
327 }
328 break;
329
330 default: assert(false, "bad CallInfo"); return nullptr;
331 }
332
333 // @CallerSensitive annotation detected
334 if (m->caller_sensitive()) {
335 flags |= CALLER_SENSITIVE;
336 }
337
338 Handle resolved_method = info.resolved_method_name();
339 assert(java_lang_invoke_ResolvedMethodName::vmtarget(resolved_method()) == m() || m->is_old(),
340 "Should not change after link resolution");
341
342 oop mname_oop = mname();
343 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
344 java_lang_invoke_MemberName::set_method (mname_oop, resolved_method());
345 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); // vtable/itable index
346 java_lang_invoke_MemberName::set_clazz (mname_oop, m_klass->java_mirror());
347 // Note: name and type can be lazily computed by resolve_MemberName,
348 // if Java code needs them as resolved String and MethodType objects.
349 // If relevant, the vtable or itable value is stored as vmindex.
350 // This is done eagerly, since it is readily available without
351 // constructing any new objects.
352 return mname();
353 }
354
355 oop MethodHandles::init_field_MemberName(Handle mname, fieldDescriptor& fd, bool is_setter) {
356 InstanceKlass* ik = fd.field_holder();
357 int flags = (jushort)( fd.access_flags().as_short());
358 flags |= IS_FIELD | ((fd.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT);
359 if (fd.is_trusted_final()) flags |= TRUSTED_FINAL;
360 if (fd.is_flat()) flags |= FLAT_FIELD;
361 if (fd.is_null_free_inline_type()) flags |= NULL_RESTRICTED;
362 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT);
363 int vmindex = fd.offset(); // determines the field uniquely when combined with static bit
364
365 oop mname_oop = mname();
366 java_lang_invoke_MemberName::set_flags (mname_oop, flags);
367 java_lang_invoke_MemberName::set_method (mname_oop, nullptr);
368 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex);
369 java_lang_invoke_MemberName::set_clazz (mname_oop, ik->java_mirror());
370
371 oop type = field_signature_type_or_null(fd.signature());
372 oop name = field_name_or_null(fd.name());
373 if (name != nullptr)
374 java_lang_invoke_MemberName::set_name(mname_oop, name);
375 if (type != nullptr)
376 java_lang_invoke_MemberName::set_type(mname_oop, type);
377 // Note: name and type can be lazily computed by resolve_MemberName,
378 // if Java code needs them as resolved String and Class objects.
379 // Note that the incoming type oop might be pre-resolved (non-null).
380 // The base clazz and field offset (vmindex) must be eagerly stored,
381 // because they unambiguously identify the field.
792 } else {
793 assert(false, "ref_kind=%d", ref_kind);
794 }
795 if (HAS_PENDING_EXCEPTION) {
796 if (speculative_resolve) {
797 CLEAR_PENDING_EXCEPTION;
798 }
799 return empty;
800 }
801 }
802 if (result.resolved_appendix().not_null()) {
803 // The resolved MemberName must not be accompanied by an appendix argument,
804 // since there is no way to bind this value into the MemberName.
805 // Caller is responsible to prevent this from happening.
806 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty);
807 }
808 result.set_resolved_method_name(CHECK_(empty));
809 oop mname2 = init_method_MemberName(mname, result);
810 return Handle(THREAD, mname2);
811 }
812 case IS_OBJECT_CONSTRUCTOR:
813 {
814 CallInfo result;
815 LinkInfo link_info(defc, name, type, caller, access_check, loader_constraint_check);
816 {
817 assert(!HAS_PENDING_EXCEPTION, "");
818 if (name == vmSymbols::object_initializer_name() && type->is_void_method_signature()) {
819 LinkResolver::resolve_special_call(result, Handle(), link_info, THREAD);
820 } else {
821 break; // will throw after end of switch
822 }
823 if (HAS_PENDING_EXCEPTION) {
824 if (speculative_resolve) {
825 CLEAR_PENDING_EXCEPTION;
826 }
827 return empty;
828 }
829 }
830 assert(result.is_statically_bound(), "");
831 result.set_resolved_method_name(CHECK_(empty));
832 oop mname2 = init_method_MemberName(mname, result);
833 return Handle(THREAD, mname2);
834 }
835 case IS_FIELD:
836 {
837 fieldDescriptor result; // find_field initializes fd if found
838 {
861 // Resolving it plants a vmtarget/vmindex in it,
862 // which refers directly to JVM internals.
863 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) {
864 assert(java_lang_invoke_MemberName::is_instance(mname()), "");
865
866 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != nullptr);
867 bool have_name = (java_lang_invoke_MemberName::name(mname()) != nullptr);
868 bool have_type = (java_lang_invoke_MemberName::type(mname()) != nullptr);
869 int flags = java_lang_invoke_MemberName::flags(mname());
870
871 if (suppress != 0) {
872 if (suppress & _suppress_defc) have_defc = true;
873 if (suppress & _suppress_name) have_name = true;
874 if (suppress & _suppress_type) have_type = true;
875 }
876
877 if (have_defc && have_name && have_type) return; // nothing needed
878
879 switch (flags & ALL_KINDS) {
880 case IS_METHOD:
881 case IS_OBJECT_CONSTRUCTOR:
882 {
883 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
884 if (vmtarget == nullptr) {
885 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand");
886 }
887 methodHandle m(THREAD, vmtarget);
888 DEBUG_ONLY(vmtarget = nullptr); // safety
889 if (!have_defc) {
890 InstanceKlass* defc = m->method_holder();
891 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror());
892 }
893 if (!have_name) {
894 //not java_lang_String::create_from_symbol; let's intern member names
895 oop name = StringTable::intern(m->name(), CHECK);
896 java_lang_invoke_MemberName::set_name(mname(), name);
897 }
898 if (!have_type) {
899 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK);
900 java_lang_invoke_MemberName::set_type(mname(), type());
901 }
983 trace_method_handle(_masm, qname);
984 // LSan appears unable to keep track of qname, ignore it.
985 LSAN_IGNORE_OBJECT(qname);
986 // Note: Don't free the allocated char array because it's used
987 // during runtime.
988 }
989 }
990
991 //
992 // Here are the native methods in java.lang.invoke.MethodHandleNatives
993 // They are the private interface between this JVM and the HotSpot-specific
994 // Java code that implements JSR 292 method handles.
995 //
996 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way
997 // that intrinsic (non-JNI) native methods are defined in HotSpot.
998 //
999
1000 #ifndef PRODUCT
1001 #define EACH_NAMED_CON(template, requirement) \
1002 template(java_lang_invoke_MemberName,MN_IS_METHOD) \
1003 template(java_lang_invoke_MemberName,MN_IS_OBJECT_CONSTRUCTOR) \
1004 template(java_lang_invoke_MemberName,MN_IS_FIELD) \
1005 template(java_lang_invoke_MemberName,MN_IS_TYPE) \
1006 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \
1007 template(java_lang_invoke_MemberName,MN_TRUSTED_FINAL) \
1008 template(java_lang_invoke_MemberName,MN_HIDDEN_MEMBER) \
1009 template(java_lang_invoke_MemberName,MN_FLAT_FIELD) \
1010 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \
1011 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \
1012 template(java_lang_invoke_MemberName,MN_NESTMATE_CLASS) \
1013 template(java_lang_invoke_MemberName,MN_HIDDEN_CLASS) \
1014 template(java_lang_invoke_MemberName,MN_STRONG_LOADER_LINK) \
1015 template(java_lang_invoke_MemberName,MN_ACCESS_VM_ANNOTATIONS) \
1016 template(java_lang_invoke_MemberName,MN_MODULE_MODE) \
1017 template(java_lang_invoke_MemberName,MN_UNCONDITIONAL_MODE) \
1018 template(java_lang_invoke_MemberName,MN_TRUSTED_MODE) \
1019 /*end*/
1020
1021 #define IGNORE_REQ(req_expr) /* req_expr */
1022 #define ONE_PLUS(scope,value) 1+
1023 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0;
1024 #define VALUE_COMMA(scope,value) scope::value,
1025 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 };
1026 #define STRING_NULL(scope,value) #value "\0"
1027 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) };
1028
1029 static bool advertise_con_value(int which) {
1127
1128 Klass* caller = caller_jh == nullptr ? nullptr :
1129 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh));
1130 Handle resolved = MethodHandles::resolve_MemberName(mname, caller, lookup_mode,
1131 speculative_resolve == JNI_TRUE,
1132 CHECK_NULL);
1133
1134 if (resolved.is_null()) {
1135 int flags = java_lang_invoke_MemberName::flags(mname());
1136 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK;
1137 if (!MethodHandles::ref_kind_is_valid(ref_kind)) {
1138 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format");
1139 }
1140 if (speculative_resolve) {
1141 assert(!HAS_PENDING_EXCEPTION, "No exceptions expected when resolving speculatively");
1142 return nullptr;
1143 }
1144 if ((flags & ALL_KINDS) == IS_FIELD) {
1145 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "field resolution failed");
1146 } else if ((flags & ALL_KINDS) == IS_METHOD ||
1147 (flags & ALL_KINDS) == IS_OBJECT_CONSTRUCTOR) {
1148 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "method resolution failed");
1149 } else {
1150 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed");
1151 }
1152 }
1153
1154 return JNIHandles::make_local(THREAD, resolved());
1155 }
1156 JVM_END
1157
1158 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) {
1159 if (mname == nullptr ||
1160 java_lang_invoke_MemberName::clazz(mname) == nullptr) {
1161 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved");
1162 } else {
1163 int flags = java_lang_invoke_MemberName::flags(mname);
1164 if ((flags & IS_FIELD) != 0 &&
1165 (must_be_static
1166 ? (flags & JVM_ACC_STATIC) != 0
1167 : (flags & JVM_ACC_STATIC) == 0)) {
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