src/utils/LogCompilation/README
author tschatzl
Wed, 31 Oct 2018 13:43:57 +0100
changeset 52346 08041b0d7c08
parent 48170 3af0ab7d1d90
permissions -rw-r--r--
6490394: G1: Allow heap shrinking / memory unmapping after reclaiming regions during Remark Reviewed-by: sjohanss, sangheki

This is a very rough tool for parsing -XX:+LogCompilation output.
It's main purpose is to recreate output similar to
-XX:+PrintCompilation -XX:+PrintInlining output from a debug JVM.  It
requires a 1.5 JDK to build and simply typing make should build it.

It produces a jar file, logc.jar, that can be run on the
HotSpot log (by default, hotspot_pid{pid}.log) from LogCompilation output like this:

  java -jar logc.jar hotspot_pid1234.log

This will produce something like the normal PrintCompilation output.
Adding the -i option with also report inlining like PrintInlining.

More information about the LogCompilation output can be found at

https://wiki.openjdk.java.net/display/HotSpot/LogCompilation+overview
https://wiki.openjdk.java.net/display/HotSpot/PrintCompilation
https://wiki.openjdk.java.net/display/HotSpot/LogCompilation+tool

The project layout is now for Maven. To build the project with Maven do:

  mvn clean install

The build also copies the resulting target jar to ./logc.jar for easy 
interop with the Makefile build.