RFR(XS): [TEST] add test to verify EnableTrace works

[David Holmes]

On 4/09/2018 10:12 AM, Liu, Xin wrote:
> Hi, David,
> Thank you for reviewing it.
> 
> If you are using OracleJDK, it won't have any output. OracleJDK doesn't suffer from crash. I guess It suppress events unconditionally.
> For JDK8u, "-XX:+EnableTracing -version" will dump some events.  It won't crash if it has this patch http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/80ee2541504e
> The attachment is the output.

If the Oracle JDK doesn't produce any output then this test will fail on 
the Oracle JDK so can't be accepted in current form.

There's something going on with EnableTracing that I'm not 
understanding. I'll try to take a closer look tomorrow ( was on a day 
off today).

Thanks,
David

> 
> Output of jtreg
> ###
> # Running suite single for openJDK
> # Results are available in build/brazil-open-single-tests
> ###
> Directory "build/JTwork" not found: creating
> Passed: runtime/EnableTracing/TestEnableTracing.java
> Test results: passed: 1
> Report written to /local/home/xxinliu/ws-openjdk8/build/OpenJDK8CompatibilityTests/OpenJDK8CompatibilityTests-1.0/RHEL5_64/DEV.STD.PTHREAD/build/brazil-open-single-tests/html/report.html
> Results written to /local/home/xxinliu/ws-openjdk8/build/OpenJDK8CompatibilityTests/OpenJDK8CompatibilityTests-1.0/RHEL5_64/DEV.STD.PTHREAD/build/JTwork
> 
> Thanks,
> --lx
> 
> 
> On 9/2/18, 10:01 PM, "David Holmes" <david.holmes at oracle.com> wrote:
> 
>      Hi,
>      
>      On 25/08/2018 2:35 AM, Liu, Xin wrote:
>      > Hi, hotspot-Runtime Developers,
>      >
>      > Could you review this small tests?
>      > It adds a new test to verify +EnableTracing works for jdk8u.
>      
>      I don't see any output produced with just "-XX:+EnableTracing -version". ??
>      
>        >
>      /java/re/jdk/8u172/promoted/latest/binaries/linux-amd64/fastdebug/bin/java
>      -XX:+EnableTracing -version
>      java version "1.8.0_172-fastdebug"
>      Java(TM) SE Runtime Environment (build 1.8.0_172-fastdebug-b35)
>      Java HotSpot(TM) 64-Bit Server VM (build 25.172-b35-fastdebug, mixed mode)
>      
>      Thanks,
>      David
>      
>      > BUG:  https://bugs.openjdk.java.net/browse/JDK-8209863
>      > WEBREV: http://cr.openjdk.java.net/~phh/8209863/webrev.00/
>      >
>      > Thanks,
>      > -lx
>      >
>      
>