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README
author ysr
Wed, 07 Sep 2011 13:55:42 -0700
changeset 10526 3e92f211533f
parent 10208 9bc94e291a10
child 15787 496cd89abcc5
permissions -rw-r--r--
4965777: GC changes to support use of discovered field for pending references Summary: If and when the reference handler thread is able to use the discovered field to link reference objects in its pending list, so will GC. In that case, GC will scan through this field once a reference object has been placed on the pending list, but not scan that field before that stage, as the field is used by the concurrent GC thread to link discovered objects. When ReferenceHandleR thread does not use the discovered field for the purpose of linking the elements in the pending list, as would be the case in older JDKs, the JVM will fall back to the old behaviour of using the next field for that purpose. Reviewed-by: jcoomes, mchung, stefank

README:
  This file should be located at the top of the OpenJDK Mercurial root
  repository. This root repository will include a "make" directory,
  and a Makefile for building the entire OpenJDK.
  A full OpenJDK repository set (forest) should also include the following
  6 nested repositories:
    "jdk", "hotspot", "langtools", "corba", "jaxws"  and "jaxp".
  There are also several source downloads for the jax* repositories that
  will be needed.

  This one root repository can be obtained with something like:

    hg clone http://hg.openjdk.java.net/jdk8/jdk8 openjdk8
  
  To make sure you have all the nested repositories, you can run the
  get_source.sh script located in the same respository as this file:

    cd openjdk8 && sh ./get_source.sh

  People unfamiliar with Mercurial should read the first few chapters of
  the Mercurial book: http://hgbook.red-bean.com/read/

  See http://openjdk.java.net/ for more information about the OpenJDK.

Simple Build Instructions:
  
  0. Get the necessary system software/packages installed on your system, see
     http://hg.openjdk.java.net/jdk8/build/raw-file/tip/README-builds.html

  1. If you don't have a jdk6 installed, download and install a JDK 6 from
     http://java.sun.com/javase/downloads/index.jsp
     Set the environment variable ALT_BOOTDIR to the location of JDK 6.

  2. Check the sanity of doing a build with your current system:
       make sanity
     See README-builds.html if you run into problems.
  
  3. Do a complete build of the OpenJDK:
       make all
     The resulting JDK image should be found in build/*/j2sdk-image

where make is GNU make 3.81 or newer, /usr/bin/make on Linux usually
is 3.81 or newer.

Complete details are available in README-builds.html.
jdk-sandbox