RFR: JDK-8202384: Introduce altserver jvm variant with speculative execution disabled

Erik Joelsson erik.joelsson at oracle.com
Fri Jun 8 21:55:44 UTC 2018

Doh, thanks, updated in place.


On 2018-06-08 14:53, Daniel D. Daugherty wrote:
> On 6/8/18 5:50 PM, Erik Joelsson wrote:
>> On 2018-06-07 17:30, David Holmes wrote:
>>> On 8/06/2018 6:11 AM, Erik Joelsson wrote:
>>>> I just don't think the extra work is warranted or should be 
>>>> prioritized at this point. I also cannot think of a combination of 
>>>> options required for what you are suggesting that wouldn't be 
>>>> confusing to the user. If someone truly feels like these flags are 
>>>> forced on them and can't live with them, we or preferably that 
>>>> person can fix it then. I don't think that's dictatorship. OpenJDK 
>>>> is still open source and anyone can contribute.
>>> I don't see why --enable-hardened-jdk and --enable-hardened-hotspot 
>>> to add to the right flags would be either complicated or confusing.
>> For me the confusion surrounds the difference between 
>> --enable-hardened-hotspot and --with-jvm-variants=server, hardened 
>> and making the user understand it. But sure, it is doable. Here is a 
>> new webrev with those two options as I interpret them. Here is the 
>> help text:
>>  --enable-hardened-jdk   enable hardenening compiler flags for all jdk
> Typo: 'hardenening' -> 'hardening'
>> libraries (except the JVM), typically disabling
>>                           speculative cti. [disabled]
>>  --enable-hardened-hotspot
>>                           enable hardenening compiler flags for 
>> hotspot (all
> Typo: 'hardenening' -> 'hardening'
>> jvm variants), typically disabling speculative cti.
>>                           To make hardening of hotspot a runtime choice,
>>                           consider the "hardened" jvm variant instead 
>> of this
>>                           option. [disabled]
>> Note that this changes the default for jdk libraries to not enable 
>> hardening unless the user requests it.
>> Webrev: http://cr.openjdk.java.net/~erikj/8202384/webrev.04/
>> /Erik
> Dan

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