RFR: 8146800: Reorganize logging alias code.

[harold seigel]

Hi Max,

Other than the copyright dates and minor #include alphabetizing the 
changes look good.

Harold

On 1/12/2016 3:29 PM, Max Ockner wrote:
> David,
> Originally, VAR_LOG_TAGS was included to help use the configure_stdout 
> function. Marcus has suggested that I don't need it so I have removed it.
> New webrev: http://cr.openjdk.java.net/~mockner/aliastable.04/
> Thanks,
> Max
> On 1/12/2016 1:31 AM, David Holmes wrote:
>> Hi Max,
>>
>> On 12/01/2016 3:02 AM, Max Ockner wrote:
>>> Hello all,
>>> Please review my fix which reorganizes the alias table for Unified 
>>> Logging.
>>>
>>> bug: https://bugs.openjdk.java.net/browse/JDK-8146800
>>> webrev: http://cr.openjdk.java.net/~mockner/aliastable.03/
>>
>> Is this supposed to contain the VAR_LOG_TAGS changes?
>>
>> Is the "deprecation" of the converted tracing flags still to be added?
>>
>> Otherwise seems okay.
>>
>> Thanks,
>> David
>>
>>> Summary:
>>> How logging aliases used to handled - At the beginning of
>>> parse_each_vm_init_arg() in arguments.cpp, each "-XX" argument would be
>>> looked up in the logging alias table to see if there was a match. If a
>>> match was found, then the entire argument would be replaced by a
>>> corresponding unified logging argument. This argument would then 
>>> cascade
>>> through the giant case structure until it was caught and handled close
>>> to the bottom of parse_each_vm_init_arg (which happens hundreds of 
>>> lines
>>> later).
>>>
>>> There is a section of code that handles aliases and deprecation for -XX
>>> options already. After this fix, logging aliases will be handled here
>>> instead of substituting entire logging expressions at the beginning of
>>> parse_each_vm_init_arg.
>>>
>>> Tested with jtreg runtime tests. This includes several logging tests 
>>> for
>>> recently aliased flags.
>>>
>>> Thanks,
>>> Max
>>>
>