RFR (XS) 8207944: java.lang.ClassFormatError: Extra bytes at the end of class file test" possibly violation of JVMS 4.7.1

Lois Foltan lois.foltan at oracle.com
Thu Jul 26 18:59:11 UTC 2018

Hi Harold,

This fix looks good and also I believe trivial enough to push.


On 7/26/2018 1:05 PM, Harold David Seigel wrote:
> Hi,
> Please review this JDK-11 fix for bug JDK-8207944.  The fix adds 
> necessary handling of unknown attributes when the class file version 
> >= JAVA_11_VERSION.  Without this fix, the class file bytes for those 
> attributes do not get skipped over when parsing the class file, 
> corrupting further parsing of the class file.
> Open Webrev: http://cr.openjdk.java.net/~hseigel/bug_8207944_11/webrev/
> JBS Bug:  https://bugs.openjdk.java.net/browse/JDK-8207944
> This fix was regression tested by running JCK Lang and VM tests on 
> Linux-x64 and by running the new test.  Testing that consists of 
> running Mach5 tiers 1 and 2 tests and builds on Linux-X64, Windows, 
> Solaris Sparc, and Mac OS X, and running tiers 3-5 tests on Linux-x64, 
> is in progress.
> Thanks, Harold

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