[13] RFR(XS/M): 8226699 [BACKOUT] JDK-8221734 Deoptimize with handshakes

[David Holmes]

Hi Dan,

This looks like an accurate backout of the changes.

Thanks,
David

On 24/06/2019 2:35 pm, Daniel D. Daugherty wrote:
> Greetings,
> 
> The Runtime team has decided to backout the following fix from JDK13:
> 
>      JDK-8221734 Deoptimize with handshakes
>      https://bugs.openjdk.java.net/browse/JDK-8221734
> 
> in order to provide time to deal with the following regression in the
> JDK14 time frame:
> 
>      JDK-8225351 assert failed: Revoke failed, unhandled biased lock state
>      https://bugs.openjdk.java.net/browse/JDK-8225351
> 
> This is a backout of an 'M'-sized patch so it's 'XS' because it is a
> backout that has been mechanically verified, but the numbers of lines
> touched makes it an 'M'.
> 
> Here's the backout bug:
> 
>      JDK-8226699 [BACKOUT] JDK-8221734 Deoptimize with handshakes
>      https://bugs.openjdk.java.net/browse/JDK-8226699
> 
> Here's the webrev:
> 
> http://cr.openjdk.java.net/~dcubed/8226699-webrev/0_for_jdk13/index.html
> 
> Here's the webrev for JDK-8221734:
> 
>      http://cr.openjdk.java.net/~rehn/8221734/v5/webrev/
> 
> Thanks, in advance, for any comments, questions or suggestions.
> 
> Dan (and Robbin)