RFR: JDK-8201483 Make it possible to disable JVM features

Magnus Ihse Bursie magnus.ihse.bursie at oracle.com
Thu Apr 12 16:53:39 UTC 2018


> 12 apr. 2018 kl. 17:38 skrev Erik Joelsson <erik.joelsson at oracle.com>:
> 
> Looks good. Especially adding those # header lines in basics.m4!

Thanks!

I'm actually thinking about splitting out a utils.m4 from basics.m4, for these kinds of helper functions. Sounds ok?

> 
> I guess a future followup now is to get rid of the individual enable/disable args that are now redundant.

Yes, that is the goal. 

/Magnus

> 
> /Erik
> 
> 
>> On 2018-04-12 04:39, Magnus Ihse Bursie wrote:
>> It is currently easy to add new JVM features to the JVM build, but it is not possible to remove features.
>> 
>> With this change, features can be both added or removed from the default set. They are added using --with-jvm-features=f1,f2 and removed using --with-jvm-features=-f1,-f2. The syntax can be combined, so --with-jvm-features=dtrace,-nmt will enable dtrace but disable native memory tracking.
>> 
>> I also included some additional code cleanup and fixes, such as printing the JVM feature set at the summary.
>> 
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8201483
>> WebRev: http://cr.openjdk.java.net/~ihse/JDK-8201483-disable-JVM-features/webrev.01
>> 
> 



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