RFR 8207016 : [win] Avoid redundant native memory allocation in getFinalPath()

[Alan Bateman]

On 11/07/2018 03:33, Ivan Gerasimov wrote:
> Hello!
>
> File src/java.base/windows/native/libjava/WinNTFileSystem_md.c
> The function getFinalPath() is wrapper for 
> GetFinalPathNameByHandleW(), which is used to resolve the symlinks on 
> Windows.
>
> If the resulting string begins with a prefix "\\?\" or "\\?\UNC", a 
> copy without the prefix is created and returned.
>
> Instead of creating the copy, we can override the result with 
> memmove() to avoid allocating extra native memory.
> The result of getFinalPath() is short living anyway, so a few unused 
> bytes at the end of the buffer should not be a problem.
>
> The advantage is a shorter code and minus one point of possible failure.
>
> Would you please help review it?
>
> BUG: https://bugs.openjdk.java.net/browse/JDK-8207016
> Webrev: http://cr.openjdk.java.net/~igerasim/8207016/00/webrev/
I think this looks okay.

-Alan