[LLVMdev] Introduction and questions
gbenson at redhat.com
Wed Apr 2 04:23:04 PDT 2008
Gordon Henriksen wrote:
> On 2008-04-02, at 05:55, Gary Benson wrote:
> > I've been working on making a non-architecture specific port of
> > OpenJDK these past few months. It's interpreter-only at present,
> > and very slow, and I'd like to use LLVM to add some kind of JIT to
> > it.
> > So far I'm just trying to figure out how it would all slot in. The
> > existing code in OpenJDK is written to accomodate different JITs,
> > so integrating peripheral stuff like garbage collection seems
> > pretty simple, but method dispatch seems like it will be tricky.
> > The examples I've seen require an ExecutionEngine to execute code.
> > Is it possible to bypass this and get a function pointer? So you
> > could use it like this:
> > typedef void (*function_t)(methodOop method, JavaThread *thread);
> > function_t func = [some LLVM call here];
> > func(method, thread);
> > That would solve pretty much all my problems :)
> The getPointerToFunctionOrStub method that does what you want in the
Perfect, thank you!
More information about the llvm-dev