RFR(XS): 8056930: Output host info under some condition for core dump

[David Holmes]

Hi Yumin,

On 6/09/2014 7:46 AM, Yumin Qi wrote:
> Please review
>
> Bug:  https://bugs.openjdk.java.net/browse/JDK-8056930
> Webrev:  http://cr.openjdk.java.net/~minqi/8056930/webrev00

The posix change seems fine as it adds nothing new to the process.

However I have to wonder for the Windows fix whether GetComputerNameEx 
will be callable in general when we are crashing? We already attempt to 
do a lot of things in error reporting that can fail, so I guess adding 
one more doesn't really change things - as long as it seems to be 
working most of the time.

Thanks,
David

>    After java crashed, we would like to know the host on which it failed
> especially when doing parallel testing on multiple machines. The most
> useful for knowing host name is telling if the test is hardware related,
> that the test can only repeat on it.   This piece of code help to print
> out host name in debug mode.
>
>    Test: manually tested on Unix/Linux/Windows with
> -XX:+CrashGCForDumpingJavaThread.
>     JPRT
>
> Thanks
> Yumin