The Mono Beta 1 was released today and I've prepared a new snapshot that works with this version to test interoperability.

What's new?

• Fixed ik.vm.jni.build to create output directory.
• Added Profiler.Count calls to ByteCodeHelper.cs for dynamic helper methods.
• Fixed TypeWrapper.IsSamePackage to handle case where one type is array and other isn't.
• Fixed bug introduced in last snapshot in bytecode compiler, that caused NullReferenceException if exception block starts on an unreachable instructions.
• Added exception handling to VMRuntime.exec.
• Added -Xwait option to ikvm, to keep the process hanging around (this is just a hack so I can look at the console window that contains the profiling statistics and trace messages after Eclipse has exited).
• Fixed ikvmc to ignore Main-Class attribute when building a library.
• Implemented JNI methods AllocObject and ReleasePrimitiveArrayCritical (on Windows JNI provider only).
• Fixed resource loading from -Xbootclasspath.
• Fixed a minor bug in remapped type handling.
• Changed map.xml format to support future metadata annotations (thanks Stuart!).
• Fixed handling of final fields in ikvmc.
• Changed handling of shadow types (e.g. cli.System.Object now extends java.lang.Object and cli.System.String exists side by side with java.lang.String).
• Fixed support for deserializing final fields.
• Fixed java.lang.Class/VMClass to no longer require VMClass instances (Class now contains direct reference to TypeWrapper).
• Added the managed part of the Mono JNI provider to CVS and the build script (and the snapshot).
• Updated the SharpZipLib reference to the latest version.
• Locked to GNU Classpath 0.09 and changed classpath build directory to ../../classpath-0.09
• Fixed Thread.sleep() to support larger values than Integer.MAX_VALUE

Linux Lamer

Since I'm a Linux Lamer (tm), I'm documenting the steps here to get JNI to work with Mono (primarily for my own use).

• cd /usr/local/src/classpath-0.09
• ./configure --with-jikes --disable-gtk-peer
• make
• cp include/jni.h /usr/local/include/
• cp include/jni_md.h /usr/local/include/
• cd ../mono-0.91/ikvm-jni/
• make && make install
• cd ../jnitest
• vi test.java

  class test {
    public static void main(String[] args) {
      System.loadLibrary("test");
      nativeMethod();
    }
    static native void nativeMethod();
  }

• jikes -cp ../classpath-0.09:../classpath-0.09/vm/reference:../ikvm/classpath test.java
• vi test.c

  #include <stdio.h>
  #include <jni.h>
  JNIEXPORT void JNICALL Java_test_nativeMethod(
                     JNIEnv* env, jclass clazz) {
    printf("Hello from JNI\n");
  }

• gcc -shared test.c -o libtest.so
• export LD_LIBRARY_PATH=.
• ikvm test

New snapshots: just the binaries and source plus binaries.

The GNU Classpath release that this is based on can be downloaded from ftp://ftp.gnu.org/pub/gnu/classpath/classpath-0.09.tar.gz

Note that anon cvs for SourceForge is apparently still lagging behind, so at the moment I'm posting this, anon cvs does not yet contain the latest changes.