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6419370: 4/4 new jmethodID code has tiny holes in synchronization

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Fix races in jmethodID cache and JNI itable index cache.

Reviewed-by: ikrylov, acorn
This commit is contained in:
Daniel D. Daugherty 2009-09-21 09:30:24 -06:00
parent 9ed976194b
commit 2a4f284029
4 changed files with 204 additions and 53 deletions
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6
hotspot/src/share/vm/classfile/classFileParser.cpp
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@ -3231,6 +3231,12 @@ instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
this_klass->set_has_final_method();
}
this_klass->set_method_ordering(method_ordering());
// The instanceKlass::_methods_jmethod_ids cache and the
// instanceKlass::_methods_cached_itable_indices cache are
// both managed on the assumption that the initial cache
// size is equal to the number of methods in the class. If
// that changes, then instanceKlass::idnum_can_increment()
// has to be changed accordingly.
this_klass->set_initial_method_idnum(methods->length());
this_klass->set_name(cp->klass_name_at(this_class_index));
if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself