[9] RFR (XS): 8171155: Scanning method file for initialized final field updates can fail for non-existent fields

[Coleen Phillimore]

Zoltan,

This fix looks good.

Thanks!
Coleen

On 12/13/16 6:35 AM, Zoltán Majó wrote:
> Hi,
>
>
> please review the fix for 8171155.
>
> https://bugs.openjdk.java.net/browse/JDK-8171155
> http://cr.openjdk.java.net/~zmajo/8171155/webrev.00/
>
> The JVM assumes the field it's looking for always exists. As a result, 
> the JVM processes uninitialized data if the field does not exists, 
> which results in a crash. The suggested fix is to check if the field 
> exists before processing it. Please find more details in the bug 
> description.
>
> I found the bug while JPRT-testing the 8u-backport of
>
> 8157181: Compilers accept modification of final fields outside 
> initializer methods
>
> I was not able to reproduce the issue with 9, but (judging from the 
> code) JDK 9 is likely to be affected as well. So I'd prefer to fix 
> this problem in JDK 9 as well (and then backport the fix to 8u) 
> instead of pushing the fix only into 8u.
>
> Thank you!
>
> Best regards,
>
>
> Zoltan
>