RFR: 8145934: Make ttyLocker equivalent for Unified Logging framework

[Rachel Protacio]

Hi,

Thank you for implementing this - it will be very useful for some of our 
logging. The code looks good to me! Thanks also for the 
file_contains_substring() update in log.cpp :)

Rachel

On 2/10/2016 8:49 AM, Marcus Larsson wrote:
> Hi,
>
> Please review the following patch adding support for non-interleavable 
> multi-line log messages in UL.
>
> Summary:
> This patch adds a LogMessage class that represents a multiline log 
> message, buffering lines that belong to the same message. The class 
> has a similar interface to the Log class, with printf-like methods for 
> each log level. These methods will append the log message with 
> additional lines. Once all filled in, the log message should be sent 
> to the the appropriate log(s) using Log<>::write(). All lines in the 
> LogMessage are written in a way that prevents interleaving by other 
> messages. Lines are printed in the same order they were added to the 
> message (regardless of level). Apart from the level, decorators will 
> be identical for lines in the same LogMessage, and all lines will be 
> decorated.
>
> Webrev:
> http://cr.openjdk.java.net/~mlarsson/8145934/webrev.00/
>
> Issue:
> https://bugs.openjdk.java.net/browse/JDK-8145934
>
> Testing:
> Included tests through JPRT
>
> Thanks,
> Marcus