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

[Marcus Larsson]

Thanks for reviewing, Staffan!

Marcus

On 2015-11-26 16:54, Staffan Larsen wrote:
> Looks good!
>
> Thanks,
> /Staffan
>
>> On 26 nov. 2015, at 16:17, Marcus Larsson <marcus.larsson at oracle.com> 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/
>>
>> 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.
>>
>> 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