JDK-8021368: Launch of Java Web Start app fails with
ClassCircularityError exception in 7u25
https://bugs.openjdk.java.net/browse/JDK-8021368
This is a fix for 7u60 only. It's a regression in 7u25 due to
JDK-8010117 where it calls Class.getMethod to determine if the
checkMemberAccess method is overridden in a SecurityManager subclass but
Class.getMethod causes parameter types and returned type of other public
methods to be resolved and hence ClassCircularityError. It is not an
issue in JDK 8 as SecurityManager.checkMemberAccess is deprecated and
not called by the JDK (see JDK-8007035).
Webrev at:
http://cr.openjdk.java.net/~mchung/jdk7u/webrevs/8021368/webrev.00/
An alternative implementation is to add a new VM entry point to look up
the declaring class of an overridden method instead of using
JNI_GetMethodID and get a reflective method for a faster query. Since
this check is only performed once in most cases, this performance cost
of using JNI is not too bad that the new VM entry point doesn't
necessarily buy much more.
thanks
Mandy
