[kaffe] Cygwin status update
jim at kaffe.org
Tue Dec 16 08:20:03 PST 2003
On Tue, 16 Dec 2003 00:57:44 +0100
Dalibor Topic <robilad at kaffe.org> wrote:
> hi all,
> I've been playing with Cygwin & kaffe last week, and I've got patches to
> gradually merge in, that let kaffe build again as a static binary.
> It doesn't fully work, as the kjc step to build rt,jar crashes.
I don't think that step ever worked.
> Investigation about it shows me that the old findJarFile bug still
> strikes on Cygwin. This time I was able to figure out a little more, though.
> The problem seems to be that the first few bytes of the findJarFile
> function in kaffe/kaffevm/jar.c somehow get overwritten. I've tried to
> debug it with awatch in GDB, but didn't suceed in catching the
> overwriting happen. So I'd be glad to hear tips & tricks on dealing with
> that type of bugs from other developers.
Valgrind is what you want!
It'll tell you exactly where to look, usually.
I did get it to run Kaffe interpreter x86 binaries on Linux.
Using it with the JIT is a problem because Valgrind needs to be
explicitly informed about self-modifying code (because it is an
x86-to-x86 JIT itself). There is a way to add "hints" to the
code to help Valgrind do the right thing, but I didn't figure
that out yet.
For cygwin, some people have managed to get valgrind to run wine, so
it's possible to run it against Windows binaries that work with wine.
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