Bug ID: JDK-8009558 linked_md.c::dll_build_name can get stuck in an infinite loop

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JDK 7	JDK 8
7u60Fixed	8 b86Fixed

This came up in the review of JDK-8009397, but after that fix had been pushed.

From: "serguei.spitsyn@oracle.com" <serguei.spitsyn@oracle.com>
Subject: Re: RFR(S): 8009397 test/com/sun/jdi/PrivateTransportTest.sh: ERROR: transport library missing onLoad entry: private_dt_socket
Date: 5 mars 2013 20:26:49 CET
To: Staffan Larsen <staffan.larsen@oracle.com>
Cc: "serviceability-dev@openjdk.java.net serviceability-dev@openjdk.java.net" <serviceability-dev@openjdk.java.net>, "core-libs-dev@openjdk.java.net" <core-libs-dev@openjdk.java.net>

Hi Staffan,

Thank you for this discovery!
It looks good, but I have a couple of comments.

It seems, there is one more problem in this code:
  68         /* check for NULL path */
  69         if (p == pathname) {
  70             continue;           <== Endless loop if we hit this line
  71         }

Do we need to do 'pathname++' before continuing at the line #70?
It is going to be endless loop in cases there is a PATH_SEPARATOR
at the beginning of paths or two PATH_SEPARATOR's in a row.
These would be incorrect path lists but the code above is targeting exactly such cases.

Relates :	JDK-8028572 - Need test to cover JDK-8009558
Relates :	JDK-8009397 - test/com/sun/jdi/PrivateTransportTest.sh: ERROR: transport library missing onLoad entry: private_dt_socket