RFR (S/M): 8169703: G1 crashes with guarantee(pretouch_gang != NULL) failed: No pretouch gang specified

[Kim Barrett]

> On Nov 23, 2016, at 5:01 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> However, and that is much more serious, the
> TestSharedArchiveWithPreTouch test has had errors I did not notice.
> When running through jprt, it did not run the test (due to recent setup
> issues).
> 
> The problem has been that passing empty string parameters ("") on 32
> bit platforms (well, linux, windows is fine) are passed (and not just
> ignored) as is to the command line, which does not work as expected.
> 
> I fixed this issue in a new webrev at
> 
> http://cr.openjdk.java.net/~tschatzl/8169703/webrev.2 (full)
> http://cr.openjdk.java.net/~tschatzl/8169703/webrev.1_to_2 (diff)

Looks good.