Review request for JMC-4376: Improving the fidelity of the JMC self-profiling

[Guru]

+1 looks good to me
> On 07-Nov-2018, at 2:04 AM, Marcus Hirt <marcus.hirt at oracle.com> wrote:
> 
> Hi all,
> 
> Please review this update to improve the fidelity of the self-profiling in JMC:
> 
> diff -r 11eba06e3f96 application/org.openjdk.jmc.rcp.product/jmc.product
> --- a/application/org.openjdk.jmc.rcp.product/jmc.product       Mon Nov 05 20:39:15 2018 +0100
> +++ b/application/org.openjdk.jmc.rcp.product/jmc.product       Tue Nov 06 21:26:33 2018 +0100
> @@ -54,7 +54,7 @@
>       </programArgsMac>
>       <programArgsWin>-vm ./
>       </programArgsWin>
> -      <vmArgs>-XX:+FlightRecorder -XX:StartFlightRecording=name=JMC_Default,maxsize=100m -Djava.net.preferIPv4Stack=true -Djdk.attach.allowAttachSelf=true --add-exports=java.xml/com.sun.org.apache.xerces.internal.parsers=ALL-UNNAMED --add-exports=jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED --add-exports=java.management/sun.management=ALL-UNNAMED --add-exports=java.management/sun.management.counter.perf=ALL-UNNAMED --add-exports=jdk.management.agent/jdk.internal.agent=ALL-UNNAMED --add-exports=jdk.attach/sun.tools.attach=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=jdk.attach/sun.tools.attach=ALL-UNNAMED
> +      <vmArgs>-XX:+UnlockDiagnosticVMOptions -XX:+DebugNonSafepoints -XX:FlightRecorderOptions=stackdepth=128 -XX:+FlightRecorder -XX:StartFlightRecording=name=JMC_Default,maxsize=100m -Djava.net.preferIPv4Stack=true -Djdk.attach.allowAttachSelf=true --add-exports=java.xml/com.sun.org.apache.xerces.internal.parsers=ALL-UNNAMED --add-exports=jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED --add-exports=java.management/sun.management=ALL-UNNAMED --add-exports=java.management/sun.management.counter.perf=ALL-UNNAMED --add-exports=jdk.management.agent/jdk.internal.agent=ALL-UNNAMED --add-exports=jdk.attach/sun.tools.attach=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=jdk.attach/sun.tools.attach=ALL-UNNAMED
>       </vmArgs>
>       <vmArgsLin>--add-exports=java.desktop/sun.awt.X11=ALL-UNNAMED
>       </vmArgsLin>
> 
>