12 RFR(XS) 8214329: SwingMark SubMenus 9% regression in 12-b19 on Linux client

[Tobias Hartmann]

Hi Dean,

this looks good to me.

Best regards,
Tobias

On 17.12.18 23:49, dean.long at oracle.com wrote:
> https://bugs.openjdk.java.net/browse/JDK-8214329
> http://cr.openjdk.java.net/~dlong/8214329/webrev/
> 
> In "8212605: Pure-Java implementation of AccessController.doPrivileged", the stackwalk in
> JVM_GetStackAccessControlContext was changed from using a vframeStream to using a javaVFrame, so
> that it could access locals. However this caused a regression because javaVFrame has more
> overhead.   JDK-8215205 fixes the problem by allowing the use of javaVFrame only when needed.
> 
> This change reverts JVM_GetStackAccessControlContext back to using vframeStream, and uses the new
> API in JDK-8215205 to get a javaVFrame lazily.  It also removes two unnecessary calls to java_sender().
> 
> dl