Mercurial > hg > graal-jvmci-8
comparison src/share/vm/classfile/systemDictionary.cpp @ 8667:1f9994892f89
8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
Summary: SystemDictionary::find(...) should not create and register ClassLoaderData objects for class loaders.
Reviewed-by: coleenp, acorn
Contributed-by: Stefan Karlsson <stefan.karlsson@oracle.com>, Erik Helin <erik.helin@oracle.com>
author | stefank |
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date | Thu, 21 Feb 2013 17:22:15 +0100 |
parents | 8b46b0196eb0 |
children | 1fc4d4768b90 |
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8106:ec2eddfed950 | 8667:1f9994892f89 |
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864 // Callers should be aware that an entry could be added just after | 864 // Callers should be aware that an entry could be added just after |
865 // _dictionary->bucket(index) is read here, so the caller will not see | 865 // _dictionary->bucket(index) is read here, so the caller will not see |
866 // the new entry. | 866 // the new entry. |
867 | 867 |
868 Klass* SystemDictionary::find(Symbol* class_name, | 868 Klass* SystemDictionary::find(Symbol* class_name, |
869 Handle class_loader, | 869 Handle class_loader, |
870 Handle protection_domain, | 870 Handle protection_domain, |
871 TRAPS) { | 871 TRAPS) { |
872 | 872 |
873 // UseNewReflection | 873 // UseNewReflection |
874 // The result of this call should be consistent with the result | 874 // The result of this call should be consistent with the result |
875 // of the call to resolve_instance_class_or_null(). | 875 // of the call to resolve_instance_class_or_null(). |
876 // See evaluation 6790209 and 4474172 for more details. | 876 // See evaluation 6790209 and 4474172 for more details. |
877 class_loader = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader())); | 877 class_loader = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader())); |
878 ClassLoaderData* loader_data = register_loader(class_loader, CHECK_NULL); | 878 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data_or_null(class_loader()); |
879 | |
880 if (loader_data == NULL) { | |
881 // If the ClassLoaderData has not been setup, | |
882 // then the class loader has no entries in the dictionary. | |
883 return NULL; | |
884 } | |
879 | 885 |
880 unsigned int d_hash = dictionary()->compute_hash(class_name, loader_data); | 886 unsigned int d_hash = dictionary()->compute_hash(class_name, loader_data); |
881 int d_index = dictionary()->hash_to_index(d_hash); | 887 int d_index = dictionary()->hash_to_index(d_hash); |
882 | 888 |
883 { | 889 { |