[12] RFR (T): 8146090: java/lang/ref/ReachabilityFenceTest.java fails with -XX:+DeoptimizeALot

David Holmes david.holmes at oracle.com
Tue Dec 4 03:38:00 UTC 2018

Hi Vladimir,

On 4/12/2018 11:06 am, Vladimir Ivanov wrote:
> http://cr.openjdk.java.net/~vlivanov/8146090/webrev.00/
> https://bugs.openjdk.java.net/browse/JDK-8146090
> The test doesn't work with -XX:+DeoptimizeALot: the test expects 
> execution to continue in generated code after System.gc() call, but JVM 
> constantly deoptimizes it at that point in -XX:+DeoptimizeALot mode, so 
> execution continues in interpreter and it breaks the invariant the test 
> checks.
> The fix is to disable executing the test with -XX:+DeoptimizeALot.

I just added a query to the bug report. I can't tell what other flags 
get tested in same run that uses DeoptimizeALot. Is it better to exclude 
the test from all such runs, or to force DeoptimizeALot off in the @run 

PS. Please update the copyright line to add 2018.


> Testing: manually verified that the test isn't executed when 
> -XX:+DeoptimizeALot is specified.
> Best regards,
> Vladimir Ivanov

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