java.lang.reflect.Proxy support with native code?

Tue Jun 15 12:11:00 GMT 2004

Martin Egholm Nielsen writes:
 > > > In my progress of porting my existing code to gcj, I've run into some 
 > > > problems with java.lang.reflect.Proxy.
 > > > When running the compiled code I get a java.lang.NoClassDefFoundError 
 > > > exception thrown for "$Proxy0"...
 > > > Is there an issue with java.lang.reflect.Proxy when running natively 
 > > > compiled code?
 > > I've used it quite a lot with native code. Let's have simple test
 > > case, and we'll see what happens.
 > I've attached a simple example, and below is the outcome of executing:
I get 
1: starting...
2: classloader: gnu.gcj.runtime.VMClassLoader@80b8fc0
3: proxyClass: class $Proxy0
4: constructor: public $Proxy0(java.lang.reflect.InvocationHandler)
5: got proxy! About to invoke...
In invoke...: toString
with mainline on GNU/Linux on i686, so it looks like this may be a
port specific bug.
 > I wonder if the two initial tests die because these are static build, 
 > whereas the final one isn't.
I get the failure when linking statically too, but I wouldn't expect
proxies to work with static linkage: they're about the most dynamic
feature Java gets to have!
Try linking with -Wl,-whole-archive,-lgcj,-no-whole-archive.
Andrew.