RFR: JDK-8145180: Add back PrintGC, PrintGCDetails and -Xloggc

[Bengt Rutisson]

Thanks David and Stefan!

I fixed the extra spaces.

Bengt

On 2016-01-19 15:14, David Lindholm wrote:
> Bengt,
>
> Your change looks good. Reviewed.
>
> Thanks
> David
>
> On 2016-01-18 16:52, Bengt Rutisson wrote:
>>
>> Hi everyone,
>>
>> Could I have a couple of reviews for this follow-up change to the GC 
>> logging changes for the unified logging framework?
>>
>> http://cr.openjdk.java.net/~brutisso/8145180/webrev.00/
>> https://bugs.openjdk.java.net/browse/JDK-8145180
>>
>> The change adds back the flags PrintGC and PrintGCDetails as well as 
>> -Xloggc. I've tried to keep the behavior similar to before, so if 
>> -Xloggc is used the PrintGC and PrintGCDetails settings should affect 
>> what is logged to the file not to stdout.
>>
>> The change also adds warning messages for all three flags that will 
>> let the users know that the flags have been deprecated.
>>
>> I've tried to add this code back in similar places where the code 
>> used to be. I've put PrintGC and PrintGCDetails back in globals.hpp 
>> at the same place where they used to be. I've added a method, 
>> handle_deprecated_print_gc_flags(), which is called from the place in 
>> Arguments::parse() where we used to enable PrintGC if PrintGCDetails 
>> was enabled 
>> (http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/f944761a3ce3#l134.259). 
>> I also re-introduce the Arguments::_gc_log_filename variable to hold 
>> the file name specified by -Xloggc.
>>
>> Thanks,
>> Bengt
>