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

Harold David Seigel harold.seigel at oracle.com
Mon Jul 30 12:47:43 UTC 2018

You're welcome!

I wish the code was clearer about the need to handle unknown attributes.


On 7/30/2018 2:47 AM, David Holmes wrote:
> Thanks for fixing this nestmates-induced bug Harold!
> Cheers,
> David
> On 27/07/2018 3:05 AM, 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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