RFR: 8151526: Print -Xlog configuration in the hs_err_pid file

[Max Ockner]

OK I tested with jcmd and I needed to add one line above the log 
configuration to make both sets of code match.
webrev: http://cr.openjdk.java.net/~mockner/8151526.03/

Thanks,
Max

On 4/5/2016 3:45 PM, Coleen Phillimore wrote:
>
> This change looks good.  You found the duplicated code for jcmd.
>
> To test this before  you check this in to verify, start a JVM running 
> some java program in an infinite loop, and do jcmd <pid> VM.info
>
> Thanks,
> Coleen
>
> On 3/29/16 3:00 PM, Max Ockner wrote:
>> Hello,
>> Please review another Unified Logging change. They are almost done, 
>> and we are serious this time.
>>
>> bug: https://bugs.openjdk.java.net/browse/JDK-8151526
>> webrev: http://cr.openjdk.java.net/~mockner/8151526.01/
>>
>> The logging configuration is now printed in each hs_err file. The 
>> output is the same as you would see from -Xlog:logging=trace and it 
>> is obtained from LogConfiguration::describe().
>>
>> Below is a sample of the hs_err contents. The Logging info is printed 
>> after VM Arguments and Whitebox, and before Environment Variables.
>>
>> VM Arguments:
>> java_command: Kaboom
>> java_class_path (initial): .
>> Launcher Type: SUN_STANDARD
>>
>> Logging:
>> Available log levels: off, trace, debug, info, warning, error
>> Available log decorators: time (t), uptime (u), timemillis (tm), 
>> uptimemillis (um), timenanos (tn), uptimenanos (un), hostname (hn), 
>> pid (p), tid (ti), level (l), tags (tg)
>> Available log tags: alloc, age, barrier, biasedlocking, bot, census, 
>> classhisto, classresolve, classinit, classload, classloaderdata, 
>> classunload, classpath, compaction, cpu, cset, defaultmethods, ergo, 
>> exceptions, exit, freelist, gc, heap, humongous, ihop, itables, jni, 
>> liveness, logging, marking, metaspace, modules, monitorinflation, os, 
>> phases, plab, promotion, preorder, protectiondomain, ref, refine, 
>> region, remset, safepoint, safepointcleanup, scavenge, scrub, 
>> stacktrace, start, startuptime, state, stats, stringdedup, 
>> stringtable, survivor, sweep, task, thread, tlab, time, 
>> verboseverification, verify, vmoperation, vtables
>> Log output configuration:
>> #0: stdout all=off uptime,level,tags,
>> #1: stderr all=warning uptime,level,tags,
>>
>> Environment Variables:
>> JAVA_HOME=/scratch/mockner/UL/8151526/build/linux-x86_64-normal-server-fastdebug/images/jdk 
>>
>> PATH=/home/mockner/tools/webrev:/bin:/usr/bin:/usr/local/bin:/usr/sbin:/home/mockner/bin:/home/mockner/linux/bin 
>>
>> SHELL=/bin/bash
>> OS=Linux
>>
>