RFR: 8142952: Unified Logging framework does not allow multiple -Xlog: arguments

[Bengt Rutisson]

Hi Marcus,

On 2015-11-26 16:17, Marcus Larsson wrote:
> Hi,
>
> New webrev after offline review with Bengt and Staffan:
> http://cr.openjdk.java.net/~mlarsson/8142952/webrev.01/
>
> Incremental:
> http://cr.openjdk.java.net/~mlarsson/8142952/webrev.00-01/

Looks good.

>
> Changes:
> * LogLevel::Unchanged was changed to LogLevel::NotMentioned.
> * Test improvements.
>
> I also looked at FormatBuffers for the string handling in LogOutput, 
> but unfortunately they are sized according to template parameters and 
> hence don't play well with the dynamic expansion required here.

Right. Thanks for trying it out.

Bengt

>
> Thanks
> Marcus
>
> On 2015-11-24 11:46, Marcus Larsson wrote:
>> Hi,
>>
>> Please review the following patch to enable multiple -Xlog arguments 
>> to aggregate the log configuration.
>>
>> Summary:
>> Tag sets that are unaffected by a -Xlog argument will now be left 
>> untouched, enabling them to keep settings from a previous -Xlog 
>> argument.
>>
>> To be able to print the current log configuration, the _config_string 
>> on LogOutputs has to be derived from each enabled tag set and its 
>> level, instead of the previous copying of the -Xlog argument. This 
>> means that -Xlog:all:stdout sets the _config_string for stdout to the 
>> explicit list of all tag sets in the VM, with level set to info.
>>
>> Webrev:
>> http://cr.openjdk.java.net/~mlarsson/8142952/webrev.00/
>>
>> Issue:
>> https://bugs.openjdk.java.net/browse/JDK-8142952
>>
>> Testing:
>> Included test through JPRT.
>>
>> Thanks,
>> Marcus
>