RFR 8218195: [testlibrary] Diagnostic output for test library ProcessTools

[Igor Ignatyev]

Hi Roger,

it looks like we might get false-positive "Process terminated unexpectedly" w/ this patch and as JDK-8218197 seems to better explain the evidence, I don't think we need this patch at all.

Thanks,
-- Igor

> On Feb 1, 2019, at 8:47 AM, Roger Riggs <Roger.Riggs at Oracle.com> wrote:
> 
> Please review the addition of diagnostic output to the test library ProcessTools.executeProcess
> to aid in diagnosing several unexplained timeouts.
> 
> It adds a second check for process being aliev using ProcessHandle and prints
> information about the current process and its descendents and all processes.
> 
> Webrev:
>    http://cr.openjdk.java.net/~rriggs/webrev-pt-alive-patch-1/
> 
> Thanks, Roger
>