More progress on the OpenJDK 8 integration and a couple of unrelated fixes.
I fixed an incompatibility with Mono (and other ECMA compliant tools that parse custom attributes). When I changed package manifest handling in 7.4 to handle reading the manifest from the right jar I unknowingly chose a custom attribute encoding that works on the CLR, but isn't actually ECMA compliant. Mono has since added support for this encoding.
Another somewhat interesting change is that I added an (internal only) feature to make it easier to replace sun.misc.Unsafe.compareAndSet() with Interlocked.CompareExchange. The trigger was the new reflection data caching in java.lang.Class. Here's an example of what it looks like:
@ikvm.internal.InterlockedCompareAndSet("reflectionData") static native boolean casReflectionData(Class<?> clazz, SoftReference<ReflectionData<T>> oldData, SoftReference<ReflectionData<T>> newData);
The ikvmc compiler will generate a method body that uses Interlocked.CompareExchange<T>() to update the reflectionData field in Class. In other places where I previously used Interlocked methods (e.g. java.util.concurrent.AtomicReferenceArray) I implemented the method body in map.xml using MSIL instructions, but here the generic version of CompareExchange is needed and I didn't want to invent a syntax for instantiating a generic method in map.xml.
Oracle is working on adding atomic operations to Java and I suggested this annotation based approach, but it was rejected because "we don't add language semantics through annotations".
Changes:
Binaries available here: ikvmbin-8.0.5268.zip Sources: ikvmsrc-8.0.5268.zip and openjdk-8-b132-stripped.zip
Remember Me
I apologize for the lameness of this, but the comment spam was driving me nuts. In order to be able to post a comment, you need to answer a simple question. Hopefully this question is easy enough not to annoy serious commenters, but hard enough to keep the spammers away.
Anti-Spam Question: What method on java.lang.System returns an object's original hashcode (i.e. the one that would be returned by java.lang.Object.hashCode() if it wasn't overridden)? (case is significant)
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