RFR: 7164841: Improvements to the GC log file rotation

[Yumin Qi]

Any volunteers for this review?

Thanks
Yumin

On 8/15/2013 8:35 AM, Yumin Qi wrote:
> Hi,
>
>   Can I have your review for this small changes?
> http://cr.openjdk.java.net/~minqi/7164841/webrev00/ 
> <http://cr.openjdk.java.net/%7Eminqi/7164841/webrev00/>
>
>    This is for a enhancement to add head/tail message to the logging 
> files to assist reading GC output.
>    1. modified prompt message if invalid arguments used for log rotating;
>    2. add time and file name message to log file head/tail.
>    3. for easily identify which log file is current, use file name 
> like <filename>.n.current, after it reaches maximum size, rename it to 
> <filename>.n
>         On Windows, there is no F_OK (existing test) definition, F_OK 
> is defined as "0" and for _access of VC++, it just describes:
>
> modevalue
>
> 	
>
> Checks file for
>
> 00
>
> 	
>
> Existence only
>
> 02
>
> 	
>
> Write-only
>
> 04
>
> 	
>
> Read-only
>
> 06
>
> 	
>
> Read and write
>
>
> http://msdn.microsoft.com/en-us/library/1w06ktdy.aspx
> The definition are consistent with unistd.h.
>
>     Test: JPRT and jtreg.
>
>    Thanks
>    Yumin

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