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de71bd1049
SymbolTable and StringTable can make calls to GC_locker::is_active() outside a safepoint. This isn't safe because the GC_locker active state (lock count) is only updated at a safepoint and only remains valid as long as _needs_gc is true. However, outside a safepoint_needs_gc can change to false at any time, which makes it impossible to do a correct call to is_active() in that context. In this case these calls can just be removed since the input argument to basic_add() should never be on the heap and so there's no need to check the GC_locker state. This change also adjusts the assert() in is_active() to makes sure all calls to this function are always done under a safepoint. Reviewed-by: brutisso, dcubed
README:
This file should be located at the top of the OpenJDK Mercurial root
repository. A full OpenJDK repository set (forest) should also include
the following 6 nested repositories:
"jdk", "hotspot", "langtools", "corba", "jaxws" and "jaxp".
The root repository can be obtained with something like:
hg clone http://hg.openjdk.java.net/jdk8/jdk8 openjdk8
You can run the get_source.sh script located in the root repository to get
the other needed repositories:
cd openjdk8 && sh ./get_source.sh
People unfamiliar with Mercurial should read the first few chapters of
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See http://openjdk.java.net/ for more information about OpenJDK.
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http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html
1. If you don't have a jdk7u7 or newer jdk, download and install it from
http://java.sun.com/javase/downloads/index.jsp
Add the /bin directory of this installation to your PATH environment
variable.
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bash ./configure
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make all
The resulting JDK image should be found in build/*/images/j2sdk-image
where make is GNU make 3.81 or newer, /usr/bin/make on Linux usually
is 3.81 or newer. Note that on Solaris, GNU make is called "gmake".
Complete details are available in the file:
http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html