RFR: 8202353: os::readdir should use readdir instead of readdir_r

[Kim Barrett]

> On Jul 10, 2018, at 4:18 PM, Kim Barrett <kim.barrett at oracle.com> wrote:
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8202353
> https://bugs.openjdk.java.net/browse/JDK-8202835
> 
> Webrev:
> http://cr.openjdk.java.net/~kbarrett/8202353/open.00/
> 
> Testing:
> mach5 tier1-5.
> tier5 is where TestSystemProcess.java is run.
> There are a number of jfr tests in tier3-4 that use process iterators on
> relevant platforms.
> There are tests related to PerfCounters scattered through tier1-3.

Oops, most of the jfr tests, including the one being reinstated, seem to be in tier6
(specifically, hs-tier6-rt).  I’ve run them locally (linux), and have an in-progress mach5
job.   Unrelated failures for JDK-8205878, because the fix for that hasn’t made it from
the jdk11 repo to the jdk repo yet.