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727333a1a3
The concurrent marking thread can complete its operation and increment the full GC counter during a Full GC. This causes the nesting of increments to the start and end of Full GCs that we are expecting to be wrong. the fix is for the marking thread to join the suspendible thread set before incrementing the counter so that it's blocked until the Full GC (or any other safepoint) is finished. The change also includes some minor code cleanup (I renamed a parameter). Reviewed-by: brutisso, ysr
README:
This file should be located at the top of the OpenJDK Mercurial repository
forest. This top or enclosing repository will include a "make" directory,
and a Makefile at the very top of the repository.
It should also include the 6 repositories: "jdk", "hotspot", "langtools",
"corba", "jaxws" and "jaxp".
See http://openjdk.java.net/ for more information about the OpenJDK.
Simple Build Instructions:
1. 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 this JDK 6.
2. Download and install the Binary Plugs for the most recent JDK7 from
http://download.java.net/openjdk/jdk7/
Set the environment variable ALT_BINARY_PLUGS_PATH to the location of
these binary plugs.
3. Check the sanity of doing a build with the current machine:
gnumake sanity
See README-builds.html if you run into problems.
4. Do a complete build of the jdk:
gnumake all
The resulting JDK image should be found in build/*/j2sdk-image
where gnumake is GNU make 3.78.1 or newer, /usr/bin/make on Linux and
/usr/sfw/bin/gmake or /opt/sfw/bin/gmake on Solaris.