943 Exceptions::fthrow(THREAD_AND_LOCATION,
944 vmSymbols::java_lang_IllegalAccessError(),
945 "%s",
946 ss.as_string()
947 );
948 return;
949 }
950 }
951
952 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
953 LinkInfo link_info(pool, index, method, CHECK);
954 resolve_field(fd, link_info, byte, true, CHECK);
955 }
956
957 void LinkResolver::resolve_field(fieldDescriptor& fd,
958 const LinkInfo& link_info,
959 Bytecodes::Code byte, bool initialize_class,
960 TRAPS) {
961 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
962 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
963 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
964 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
965
966 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
967 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
968 // Check if there's a resolved klass containing the field
969 Klass* resolved_klass = link_info.resolved_klass();
970 Symbol* field = link_info.name();
971 Symbol* sig = link_info.signature();
972
973 if (resolved_klass == NULL) {
974 ResourceMark rm(THREAD);
975 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
976 }
977
978 // Resolve instance field
979 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
980 // check if field exists; i.e., if a klass containing the field def has been selected
981 if (sel_klass == NULL) {
982 ResourceMark rm(THREAD);
983 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
984 }
985
986 // Access checking may be turned off when calling from within the VM.
987 Klass* current_klass = link_info.current_klass();
988 if (link_info.check_access()) {
989
990 // check access
991 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
992
993 // check for errors
994 if (is_static != fd.is_static()) {
995 ResourceMark rm(THREAD);
996 char msg[200];
997 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
998 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
999 }
1000
1001 // A final field can be modified only
1002 // (1) by methods declared in the class declaring the field and
1003 // (2) by the <clinit> method (in case of a static field)
1004 // or by the <init> method (in case of an instance field).
1005 if (is_put && fd.access_flags().is_final()) {
1006
1007 if (sel_klass != current_klass) {
1008 ResourceMark rm(THREAD);
1009 stringStream ss;
1010 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1011 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1012 current_klass->external_name());
1013 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1014 }
1015
1016 if (fd.constants()->pool_holder()->major_version() >= 53) {
1017 Method* m = link_info.current_method();
1018 assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
1019 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1020 fd.is_static() &&
1021 !m->is_static_initializer());
1022 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1023 !fd.is_static() &&
1024 !m->is_object_initializer());
1025
1026 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1027 ResourceMark rm(THREAD);
1028 stringStream ss;
1029 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1030 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1031 m->name()->as_C_string(),
1032 is_static ? "<clinit>" : "<init>");
1033 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1034 }
1035 }
1036 }
1037
1038 // initialize resolved_klass if necessary
1039 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1040 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1041 //
1042 // note 2: we don't want to force initialization if we are just checking
1043 // if the field access is legal; e.g., during compilation
1044 if (is_static && initialize_class) {
1132
1133 // throws linktime exceptions
1134 Method* LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, TRAPS) {
1135
1136 // Invokespecial is called for multiple special reasons:
1137 // <init>
1138 // local private method invocation, for classes and interfaces
1139 // superclass.method, which can also resolve to a default method
1140 // and the selected method is recalculated relative to the direct superclass
1141 // superinterface.method, which explicitly does not check shadowing
1142 Klass* resolved_klass = link_info.resolved_klass();
1143 Method* resolved_method = NULL;
1144
1145 if (!resolved_klass->is_interface()) {
1146 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1147 } else {
1148 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1149 }
1150
1151 // check if method name is <init>, that it is found in same klass as static type
1152 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1153 resolved_method->method_holder() != resolved_klass) {
1154 ResourceMark rm(THREAD);
1155 stringStream ss;
1156 ss.print("%s: method '", resolved_klass->external_name());
1157 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1158 ss.print(" %s(", resolved_method->name()->as_C_string());
1159 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1160 ss.print(")' not found");
1161 Exceptions::fthrow(
1162 THREAD_AND_LOCATION,
1163 vmSymbols::java_lang_NoSuchMethodError(),
1164 "%s", ss.as_string());
1165 return NULL;
1166 }
1167
1168 // ensure that invokespecial's interface method reference is in
1169 // a direct superinterface, not an indirect superinterface
1170 Klass* current_klass = link_info.current_klass();
1171 if (current_klass != NULL && resolved_klass->is_interface()) {
1202 }
1203
1204 return resolved_method;
1205 }
1206
1207 // throws runtime exceptions
1208 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1209 const LinkInfo& link_info,
1210 const methodHandle& resolved_method,
1211 Handle recv, TRAPS) {
1212
1213 Klass* resolved_klass = link_info.resolved_klass();
1214
1215 // resolved method is selected method unless we have an old-style lookup
1216 // for a superclass method
1217 // Invokespecial for a superinterface, resolved method is selected method,
1218 // no checks for shadowing
1219 methodHandle sel_method(THREAD, resolved_method());
1220
1221 if (link_info.check_access() &&
1222 // check if the method is not <init>
1223 resolved_method->name() != vmSymbols::object_initializer_name()) {
1224
1225 Klass* current_klass = link_info.current_klass();
1226
1227 // Check if the class of the resolved_klass is a superclass
1228 // (not supertype in order to exclude interface classes) of the current class.
1229 // This check is not performed for super.invoke for interface methods
1230 // in super interfaces.
1231 if (current_klass->is_subclass_of(resolved_klass) &&
1232 current_klass != resolved_klass) {
1233 // Lookup super method
1234 Klass* super_klass = current_klass->super();
1235 Method* instance_method = lookup_instance_method_in_klasses(super_klass,
1236 resolved_method->name(),
1237 resolved_method->signature(),
1238 Klass::PrivateLookupMode::find);
1239 sel_method = methodHandle(THREAD, instance_method);
1240
1241 // check if found
1242 if (sel_method.is_null()) {
1624
1625
1626
1627 //------------------------------------------------------------------------------------------------------------------------
1628 // ConstantPool entries
1629
1630 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1631 switch (byte) {
1632 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1633 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1634 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1635 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1636 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1637 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1638 default : break;
1639 }
1640 return;
1641 }
1642
1643 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1644 const methodHandle& attached_method,
1645 Bytecodes::Code byte, TRAPS) {
1646 Klass* defc = attached_method->method_holder();
1647 Symbol* name = attached_method->name();
1648 Symbol* type = attached_method->signature();
1649 LinkInfo link_info(defc, name, type);
1650 switch(byte) {
1651 case Bytecodes::_invokevirtual:
1652 resolve_virtual_call(result, recv, recv->klass(), link_info,
1653 /*check_null_and_abstract=*/true, CHECK);
1654 break;
1655 case Bytecodes::_invokeinterface:
1656 resolve_interface_call(result, recv, recv->klass(), link_info,
1657 /*check_null_and_abstract=*/true, CHECK);
1658 break;
1659 case Bytecodes::_invokestatic:
1660 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1661 break;
1662 case Bytecodes::_invokespecial:
1663 resolve_special_call(result, recv, link_info, CHECK);
1664 break;
1665 default:
1666 fatal("bad call: %s", Bytecodes::name(byte));
1667 break;
1668 }
1669 }
1670
1671 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1672 LinkInfo link_info(pool, index, CHECK);
1673 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1674 }
1675
1676
1677 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
|
943 Exceptions::fthrow(THREAD_AND_LOCATION,
944 vmSymbols::java_lang_IllegalAccessError(),
945 "%s",
946 ss.as_string()
947 );
948 return;
949 }
950 }
951
952 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
953 LinkInfo link_info(pool, index, method, CHECK);
954 resolve_field(fd, link_info, byte, true, CHECK);
955 }
956
957 void LinkResolver::resolve_field(fieldDescriptor& fd,
958 const LinkInfo& link_info,
959 Bytecodes::Code byte, bool initialize_class,
960 TRAPS) {
961 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
962 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
963 byte == Bytecodes::_withfield ||
964 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield ||
965 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
966
967 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
968 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic ||
969 byte == Bytecodes::_nofast_putfield || byte == Bytecodes::_withfield);
970 // Check if there's a resolved klass containing the field
971 Klass* resolved_klass = link_info.resolved_klass();
972 Symbol* field = link_info.name();
973 Symbol* sig = link_info.signature();
974
975 if (resolved_klass == NULL) {
976 ResourceMark rm(THREAD);
977 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
978 }
979
980 if (byte == Bytecodes::_withfield && !resolved_klass->is_inline_klass()) {
981 ResourceMark rm(THREAD);
982 char msg[200];
983 jio_snprintf(msg, sizeof(msg), "Bytecode withfield cannot be used on identity class %s", resolved_klass->external_name());
984 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
985 }
986
987 if (is_put && !is_static && byte != Bytecodes::_withfield && resolved_klass->is_inline_klass()) {
988 ResourceMark rm(THREAD);
989 char msg[200];
990 jio_snprintf(msg, sizeof(msg), "Bytecode putfield cannot be used on primitive class %s", resolved_klass->external_name());
991 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
992 }
993
994 // Resolve instance field
995 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
996 // check if field exists; i.e., if a klass containing the field def has been selected
997 if (sel_klass == NULL) {
998 ResourceMark rm(THREAD);
999 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
1000 }
1001
1002 // Access checking may be turned off when calling from within the VM.
1003 Klass* current_klass = link_info.current_klass();
1004 if (link_info.check_access()) {
1005
1006 // check access
1007 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
1008
1009 // check for errors
1010 if (is_static != fd.is_static()) {
1011 ResourceMark rm(THREAD);
1012 char msg[200];
1013 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
1014 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
1015 }
1016
1017 // A final field can be modified only
1018 // (1) by methods declared in the class declaring the field and
1019 // (2) by the <clinit> method (in case of a static field)
1020 // or by the <init> method (in case of an instance field).
1021 // (3) by withfield when field is in a value type and the
1022 // selected class and current class are nest mates.
1023 if (is_put && fd.access_flags().is_final()) {
1024
1025 if (sel_klass != current_klass) {
1026 // If byte code is a withfield check if they are nestmates.
1027 bool are_nestmates = false;
1028 if (sel_klass->is_instance_klass() &&
1029 InstanceKlass::cast(sel_klass)->is_inline_klass() &&
1030 current_klass->is_instance_klass()) {
1031 are_nestmates = InstanceKlass::cast(current_klass)->has_nestmate_access_to(InstanceKlass::cast(sel_klass), THREAD);
1032 }
1033 if (!are_nestmates) {
1034 ResourceMark rm(THREAD);
1035 stringStream ss;
1036 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
1037 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1038 current_klass->external_name());
1039 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1040 }
1041 }
1042
1043 if (fd.constants()->pool_holder()->major_version() >= 53) {
1044 Method* m = link_info.current_method();
1045 assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
1046 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
1047 fd.is_static() &&
1048 !m->is_class_initializer());
1049 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
1050 !fd.is_static() &&
1051 !m->is_object_constructor());
1052
1053 if (is_initialized_static_final_update || is_initialized_instance_final_update) {
1054 ResourceMark rm(THREAD);
1055 stringStream ss;
1056 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
1057 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
1058 m->name()->as_C_string(),
1059 is_static ? "<clinit>" : "<init>");
1060 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
1061 }
1062 }
1063 }
1064
1065 // initialize resolved_klass if necessary
1066 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
1067 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
1068 //
1069 // note 2: we don't want to force initialization if we are just checking
1070 // if the field access is legal; e.g., during compilation
1071 if (is_static && initialize_class) {
1159
1160 // throws linktime exceptions
1161 Method* LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, TRAPS) {
1162
1163 // Invokespecial is called for multiple special reasons:
1164 // <init>
1165 // local private method invocation, for classes and interfaces
1166 // superclass.method, which can also resolve to a default method
1167 // and the selected method is recalculated relative to the direct superclass
1168 // superinterface.method, which explicitly does not check shadowing
1169 Klass* resolved_klass = link_info.resolved_klass();
1170 Method* resolved_method = NULL;
1171
1172 if (!resolved_klass->is_interface()) {
1173 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1174 } else {
1175 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
1176 }
1177
1178 // check if method name is <init>, that it is found in same klass as static type
1179 // Since this method is never inherited from a super, any appearance here under
1180 // the wrong class would be an error.
1181 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1182 resolved_method->method_holder() != resolved_klass) {
1183 ResourceMark rm(THREAD);
1184 stringStream ss;
1185 ss.print("%s: method '", resolved_klass->external_name());
1186 resolved_method->signature()->print_as_signature_external_return_type(&ss);
1187 ss.print(" %s(", resolved_method->name()->as_C_string());
1188 resolved_method->signature()->print_as_signature_external_parameters(&ss);
1189 ss.print(")' not found");
1190 Exceptions::fthrow(
1191 THREAD_AND_LOCATION,
1192 vmSymbols::java_lang_NoSuchMethodError(),
1193 "%s", ss.as_string());
1194 return NULL;
1195 }
1196
1197 // ensure that invokespecial's interface method reference is in
1198 // a direct superinterface, not an indirect superinterface
1199 Klass* current_klass = link_info.current_klass();
1200 if (current_klass != NULL && resolved_klass->is_interface()) {
1231 }
1232
1233 return resolved_method;
1234 }
1235
1236 // throws runtime exceptions
1237 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1238 const LinkInfo& link_info,
1239 const methodHandle& resolved_method,
1240 Handle recv, TRAPS) {
1241
1242 Klass* resolved_klass = link_info.resolved_klass();
1243
1244 // resolved method is selected method unless we have an old-style lookup
1245 // for a superclass method
1246 // Invokespecial for a superinterface, resolved method is selected method,
1247 // no checks for shadowing
1248 methodHandle sel_method(THREAD, resolved_method());
1249
1250 if (link_info.check_access() &&
1251 // check if the method is not <init>, which is never inherited
1252 resolved_method->name() != vmSymbols::object_initializer_name()) {
1253
1254 Klass* current_klass = link_info.current_klass();
1255
1256 // Check if the class of the resolved_klass is a superclass
1257 // (not supertype in order to exclude interface classes) of the current class.
1258 // This check is not performed for super.invoke for interface methods
1259 // in super interfaces.
1260 if (current_klass->is_subclass_of(resolved_klass) &&
1261 current_klass != resolved_klass) {
1262 // Lookup super method
1263 Klass* super_klass = current_klass->super();
1264 Method* instance_method = lookup_instance_method_in_klasses(super_klass,
1265 resolved_method->name(),
1266 resolved_method->signature(),
1267 Klass::PrivateLookupMode::find);
1268 sel_method = methodHandle(THREAD, instance_method);
1269
1270 // check if found
1271 if (sel_method.is_null()) {
1653
1654
1655
1656 //------------------------------------------------------------------------------------------------------------------------
1657 // ConstantPool entries
1658
1659 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1660 switch (byte) {
1661 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1662 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break;
1663 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1664 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1665 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1666 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1667 default : break;
1668 }
1669 return;
1670 }
1671
1672 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
1673 const methodHandle& attached_method,
1674 Bytecodes::Code byte, bool check_null_and_abstract, TRAPS) {
1675 Klass* defc = attached_method->method_holder();
1676 Symbol* name = attached_method->name();
1677 Symbol* type = attached_method->signature();
1678 LinkInfo link_info(defc, name, type);
1679 Klass* recv_klass = recv.is_null() ? defc : recv->klass();
1680 switch(byte) {
1681 case Bytecodes::_invokevirtual:
1682 resolve_virtual_call(result, recv, recv_klass, link_info,
1683 check_null_and_abstract, CHECK);
1684 break;
1685 case Bytecodes::_invokeinterface:
1686 resolve_interface_call(result, recv, recv_klass, link_info,
1687 check_null_and_abstract, CHECK);
1688 break;
1689 case Bytecodes::_invokestatic:
1690 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
1691 break;
1692 case Bytecodes::_invokespecial:
1693 resolve_special_call(result, recv, link_info, CHECK);
1694 break;
1695 default:
1696 fatal("bad call: %s", Bytecodes::name(byte));
1697 break;
1698 }
1699 }
1700
1701 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1702 LinkInfo link_info(pool, index, CHECK);
1703 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1704 }
1705
1706
1707 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
|