On 08/10/2010 05:51 PM, Lothar Werzinger wrote: > On Tuesday, August 10, 2010, Andrew Haley wrote: >> You are trying to redefine one of gcj's core classes, >> sun.reflect.Reflection. This is never going to work, no matter what >> combination of options you try to use: the compiled binary interface >> requires core classes to be unique. >> >> So, I removed the classes that already exist in libgcj, and it gets >> much further. > > oops. don't remember where I got that jar file, but the ReflectionHack was to > avoid errors like: > > undefined reference to `hidden alias for java::lang::Class* > sun::reflect::Reflection::getCallerClass(int)' > > from the classes in the jar file. That didn't happen when I did it. > I downloaded the reference implementation of JSR 223 and I extract the javax > part (as I get other "undefined reference to `hidden alias" errors if I use > the extracted script.jar from the reference implementation of JSR 223 as you > can see when you run my script). > > Now the SIGSEGV is gone. Thanks! > > >> You have to call JvAttachCurrentThread. > > oops I missed that when I created the test case from my real application. > >> -findirect-dispatch -fno-indirect-classes is correct. > > That's what I reasoned after a vast research on the net. > > However now I do get a "java.lang.NoClassDefFoundError: > javax.script.ScriptEngineManager" Error. I get $ LD_LIBRARY_PATH=.:/home/aph/gcc/trunk/install/lib64/ ./testgcj2 testgcj Create JavaVM ... Create JavaVM done. java.lang.NullPointerException <<No stacktrace available>> The NullPointerException happens because j_scriptEngineManager->getEngineByName() returns null. > I would expect a NoClassDefFoundError for the jython script engine itself, as > I did not provide it on the classpath, but ScriptEngineManager is in the > shared library compiled from the jar, so why do I get a NoClassDefFoundError? You need to compile your main program -fPIC. If you really want to know why, I can explain... :-) Andrew.
