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comparison src/share/vm/runtime/fieldDescriptor.cpp @ 6176:634b8615a6ba

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7177409: Perf regression in JVM_GetClassDeclaredFields after generic signature changes. Summary: In fieldDescriptor::generic_signature() returns NULL immediately if the field has no generic signature. Reviewed-by: dholmes, coleenp, jcoomes
author jiangli
date Fri, 22 Jun 2012 14:00:39 -0400
parents 71afdabfd05b
children da91efe96a93
comparison
equal deleted inserted replaced
6175:f7baf26515fc 6176:634b8615a6ba
37 oop fieldDescriptor::loader() const { 37 oop fieldDescriptor::loader() const {
38 return instanceKlass::cast(_cp->pool_holder())->class_loader(); 38 return instanceKlass::cast(_cp->pool_holder())->class_loader();
39 } 39 }
40 40
41 Symbol* fieldDescriptor::generic_signature() const { 41 Symbol* fieldDescriptor::generic_signature() const {
42 if (!has_generic_signature()) {
43 return NULL;
44 }
45
42 int idx = 0; 46 int idx = 0;
43 instanceKlass* ik = instanceKlass::cast(field_holder()); 47 instanceKlass* ik = instanceKlass::cast(field_holder());
44 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 48 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
45 if (idx == _index) { 49 if (idx == _index) {
46 return fs.generic_signature(); 50 return fs.generic_signature();