8226242 : Diagnostic output for posix_spawn failure

[Brian Burkhalter]

Hi Roger,

Looks good.

Brian

> On Jun 17, 2019, at 9:03 AM, Roger Riggs <Roger.Riggs at oracle.com> wrote:
> 
> Please review adding diagnostic information to the native code handing failures
> to exec the jspawnhelper.  Some information about the child process status can be included.
> 
> Jira:
>   diag task: https://bugs.openjdk.java.net/browse/JDK-8226242 <https://bugs.openjdk.java.net/browse/JDK-8226242>
>   Issue:  https://bugs.openjdk.java.net/browse/JDK-8226192 <https://bugs.openjdk.java.net/browse/JDK-8226192>
> 
> Webrev:
>   http://cr.openjdk.java.net/~rriggs/webrev-spawn-diag-8225192/ <http://cr.openjdk.java.net/~rriggs/webrev-spawn-diag-8225192/>