671 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
672 target, failed_type_name);
673 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
674 }
675 }
676
677 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
678 Klass* current_klass,
679 Klass* sel_klass, TRAPS) {
680 Handle ref_loader(THREAD, current_klass->class_loader());
681 Handle sel_loader(THREAD, sel_klass->class_loader());
682
683 ResourceMark rm(THREAD); // needed for check_signature_loaders
684 Symbol* failed_type_symbol =
685 SystemDictionary::check_signature_loaders(sig,
686 ref_loader, sel_loader,
687 false,
688 CHECK);
689 if (failed_type_symbol != NULL) {
690 const char* msg = "loader constraint violation: when resolving field"
691 " \"%s\" the class loader %s of the referring class, "
692 "%s, and the class loader %s for the field's resolved "
693 "type, %s, have different Class objects for that type";
694 char* field_name = field->as_C_string();
695 const char* loader1_name = java_lang_ClassLoader::describe_external(ref_loader());
696 char* sel = sel_klass->name()->as_C_string();
697 const char* loader2_name = java_lang_ClassLoader::describe_external(sel_loader());
698 char* failed_type_name = failed_type_symbol->as_C_string();
699 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
700 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
701 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
702 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
703 failed_type_name);
704 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
705 }
706 }
707
708 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
709 Bytecodes::Code code, TRAPS) {
710
711 Handle nested_exception;
712 Klass* resolved_klass = link_info.resolved_klass();
713
714 // 1. For invokevirtual, cannot call an interface method
715 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
716 ResourceMark rm(THREAD);
717 char buf[200];
718 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
719 resolved_klass->external_name());
720 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
721 }
722
723 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
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671 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
672 target, failed_type_name);
673 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
674 }
675 }
676
677 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
678 Klass* current_klass,
679 Klass* sel_klass, TRAPS) {
680 Handle ref_loader(THREAD, current_klass->class_loader());
681 Handle sel_loader(THREAD, sel_klass->class_loader());
682
683 ResourceMark rm(THREAD); // needed for check_signature_loaders
684 Symbol* failed_type_symbol =
685 SystemDictionary::check_signature_loaders(sig,
686 ref_loader, sel_loader,
687 false,
688 CHECK);
689 if (failed_type_symbol != NULL) {
690 const char* msg = "loader constraint violation: when resolving field"
691 " \"%s\" of type %s, the class loader %s of the current class, "
692 "%s, and the class loader %s for the field's defining "
693 "type, %s, have different Class objects for type %s";
694 char* field_name = field->as_C_string();
695 const char* loader1_name = java_lang_ClassLoader::describe_external(ref_loader());
696 char* sel = sel_klass->name()->as_C_string();
697 const char* loader2_name = java_lang_ClassLoader::describe_external(sel_loader());
698 char* failed_type_name = failed_type_symbol->as_C_string();
699 char* curr_klass_name = current_klass->name()->as_C_string();
700 size_t buflen = strlen(msg) + strlen(field_name) + 2 * strlen(failed_type_name) +
701 strlen(loader1_name) + strlen(curr_klass_name) +
702 strlen(loader2_name) + strlen(sel) + 1;
703 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
704 jio_snprintf(buf, buflen, msg, field_name, failed_type_name, loader1_name,
705 curr_klass_name, loader2_name, sel, failed_type_name);
706 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
707 }
708 }
709
710 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
711 Bytecodes::Code code, TRAPS) {
712
713 Handle nested_exception;
714 Klass* resolved_klass = link_info.resolved_klass();
715
716 // 1. For invokevirtual, cannot call an interface method
717 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
718 ResourceMark rm(THREAD);
719 char buf[200];
720 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
721 resolved_klass->external_name());
722 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
723 }
724
725 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
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