icedtea-1.14 JamVM + OpenJDK 7 -version patch

[Xerxes Rånby]

> What I currently observe are a
> unsatisfied link error.
> 
> xranby at xranby-ESPRIMO-P7935:~/test
> $ ../icedtea-1.14/openjdk.build/j2sdk-image/bin/java Linpack 
> java.lang.UnsatisfiedLinkError: registerNatives
> 	at sun.misc.Perf.registerNatives(Native Method)
> 	at sun.misc.Perf.<clinit>(Perf.java:536)
...
> 	at sun.misc.PerfCounter.<clinit>(PerfCounter.java:51)
> 	at java.net.URLClassLoader.defineClass(URLClassLoader.java:448)
> 
> The URLClassLoader uses sun.misc.Perf to register startup time.
> 
> I start to think this are a bug in OpenJDK 7 that the sun.misc.Perf
> constructor expects to be able to use the native registerNatives method
> in libhprof.so without explicilty making sure that this library have
> already been loaded.
> 
> The libhprof.so are part of the Hotspot JVMTI implementation so it are
> no surprise that JamVM currently dont not load it.
> 
> Rob can you tell if registerNative are supposed to be part of the public
> JNI interface between OpenJDK7 classes and the JVM?


For clarification,the native method in libhprof.so void
registerNative(void) called by the sun.misc.Perf constructor are not the
same "RegisterNatives" as the JNI interface RegisterNatives
http://download.oracle.com/javase/6/docs/technotes/guides/jni/spec/functions.html#wp17734


Xerxes