classloading from so
Tom Tromey
tromey@redhat.com
Tue Sep 24 13:54:00 GMT 2002
>>>>> "Lars" == Lars Andersen <lars@rimfaxe.com> writes:
Lars> What if an app loaded that class, then lib-org-pack.so is
Lars> recompiled. If the app should issue another class.forName,
Lars> would it load the newly compiled .so ? Or would the app have to
Lars> be restarted?
The app would have to be restarted. Currently we never unload shared
libraries.
It appears if you use the SharedLibLoader, instead of the built-in
one, then you can get class unloading. I have never tried it, but I
do note that SharedLibLoader.finalize() calls dlclose(). Of course,
for this to work, the SharedLibLoader and all its classes must be
collected.
Lars> And another related question : Is there some debugging trick to
Lars> tell which classes are executed as native code, and which are
Lars> interpreted? (I want to check if it loads the .so just right,
Lars> and isn't interpreting some class from CLASSPATH)
There are lots of ways. You could set your class path to point to a
directory where no .jar files exist. Or you could run your program in
the debugger and see what is happening. Or use ltrace. Or get a raw
stack trace (you'd have to set a system property; see NameFinder.java
for the list) and make sure that there are no interpreter frames.
Tom
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