[kaffe] porting & debugging
robilad at yahoo.com
Wed Apr 9 07:40:01 PDT 2003
--- Gerlando Falauto <iurly at writeme.com> wrote:
> Hi folks,
> I am trying to port kaffe-1.0.7 (eventually the jit
> engine too) to yet
> another platform (a weird, proprietary VLIW
> processor), and after several
> weeks of struggling because of the limitations of
> the compiler (no int64
> support, limited availability of system calls and so
> on...) I finally
> got to the part where I am able to run
> HelloWorldApp. Yippie!
Congratulations! Seems like you've had to overcome
some really nasty obstackles. That's an impressive
achievement, really. I bet ports to other
'non-standard' platforms, like MINIX, could benefit
from some of your work, especially the int64
> Before I take a path that could lead to suicide,
Please make sure you send us your patches with
changelogs, before you take any terminal steps. ;) Or
even better, don't take that path at all ...
> which is trying to work
> on the JIT (and I know for sure suicide is where I
> am headed), I would
Others have looked at the JIT code, and haven't killed
themselves yet. Relax. Get out more, and you'll feel
much better about the JIT ;)
> like to get threads to work, but I can't figure any
> way out of this.
> Here's what I have essentially done so far:
> * Packaged a library of functions to operate on
> 64-bit types (struct of
> two 32-bit integers) and replaced every operation
> between jlong variables
> with the appropriate function call
That sounds quite useful for some other platforms as
well, so it's be nice if you could send in a patch.
> * Implemented sysDepCallMethod() using the target
> * Defined COMPARE_AND_EXCHANGE in plain C (there is
> no support for
> inline asm), using a mutex to protect the code
> (there is no atomic
> exchange operation in the target assembly)
o.k., sounds nice as well. A patch would be welcome.
> * Enabled unix-pthreads as the thread system
> * Implemented sem_* using a condition variable and a
> * Disabled any Garbage Collector or Finalizer
Is there a particular reason why you're not using
unix-jthreads? I believe that the pthreads threading
only really works on linux . so unless you're
running linux on your target platform, you *could*
have more luck using jthreads.
> I really have no idea what this could be, so please
> don't spare me any
> suggestion even if it's the most obvious or stupid
> thing in the world.
Unfortunately, I don't know enough about threads to be
able to help you, but I'd suggest trying out jthreads
and seeing if that gets you any further.
> Lastly, one direct question: if I were to execute
> System.out.println("Hello World!");
> from within a native method, how would I do that?
> I suppose I should get class System, then take
> field out, and then call method println on it...
cheers and best of luck for your thesis,
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