RFR: JDK7 backport of 8020675 - invalid jar file in the bootclasspath could lead to jvm fatal error

[Andreas Eriksson]

Hi,

Could someone please review this jdk7 backport of JDK-8020675 
<https://bugs.openjdk.java.net/browse/JDK-8020675>.
Summary:
invalid jar file in the bootclasspath could lead to jvm fatal error
removed offending EXCEPTION_MARK calls and code cleanup

One code change necessary for the backport was in method 
ClassLoader::load_classfile.
The change was to use CHECK_(instanceKlassHandle()) instead of CHECK_NULL.
See the mail thread at 
http://mail.openjdk.java.net/pipermail/hotspot-dev/2014-November/015825.html 
for more information.

Webrev: http://cr.openjdk.java.net/~aeriksso/8020675/webrev.00/

Regards,
Andreas