Re: Minimal RMI server fails at in UnicastRemoteObject constructor

[Andrew Haley <aph at redhat dot com>]

Tom O'Reilly writes:
 > Hello,
 > 
 > I'm new to gcj, and trying to compile an RMI server to native code on my
 > Linux (Fedora) workstation. Any help would be greatly appreciated! I am
 > running gcj version 3.4.2.
 > 
 > My server ("BenchServer") is quite minimal; it extends
 > UnicastRemoteObject, and implements an interface ("Benchmark") that
 > contains just one method. The server's constructor first invokes
 > "super()", which generates an ExceptionInInitializerError, with message
 > "Operation not allowed".
 > 
 > Here are my build steps:
 > 
 > Compile the BenchServer class with javac, so that we can use gjc to
 > generate stub/skeleton
 >    javac BenchServer.java
 > 
 > Generate stub:
 >    rmic -v1.2 -d . BenchServer
 > 
 > Convert stub to native code:
 >    gcj -c BenchServer_Stub.class
 > 
 > Compile .java source files to native code:
 >    gcj -c Benchmark.java BenchServer.java
 > 
 > Next, link the objects, specify "main" and "policy" file:
 >    gcj Benchmark.o BenchServer.o 
 > BenchServer_Stub.o --main=BenchServer -Djava.security.policy=policy
 > 
 > The policy file looks like this:
 >   grant {
 >     // Allow everyone access to everything
 >     permission java.security.AllPermission;
 >   };
 > 
 > Now I run the a.out executable, which takes one argument (the host
 > name):
 > 
 >   a.out etna
 >   Setting security manager
 >   Constructing server...
 >   Got Exception: Operation not allowed

This is because of a security check that is bogus.  I removed it in 4.0.
I also fixed some RMI bugs.  I wouldn't attempt to use RMI in 3.4.x.

Andrew.