review for 7145537: minor tweaks to LogEvents

[Vladimir Kozlov]

Good.

Vladimir

Tom Rodriguez wrote:
> http://cr.openjdk.java.net/~never/7145537
> 62 lines changed: 19 ins; 16 del; 27 mod; 9602 unchg
> 
> 7145537: minor tweaks to LogEvents
> Reviewed-by:
> 
> A few minor fixes and corrections to the LogEvents output.  Add the
> compile id and osr flag to the nmethod logging.  Switch all the times
> to the seconds since JVM start and print in standard %.3f format.
> Override PrintHeapAtGCExtended when logging the heap.  Move
> Events::print to the cpp to ease invoking it from the debugger.  I
> also restored the extern "C" events() function to use when the
> debugger is being difficult about invoking C++ methods.  I also
> expanded the logging of implicit exceptions to record more cases.  I
> considered removing the generate implicit exception logging since
> that's not as rare as the others.  Tested with crashing the JVM.
>