Eliot, I didn't think of that, but your NotInLibrary() test "works" in that it raises a not-found error. So it looks like gsl_multifit_fdfsolver_set() is available.
Bill ________________________________ From: [email protected] [[email protected]] on behalf of Eliot Miranda [[email protected]] Sent: Sunday, March 25, 2012 3:35 PM To: [email protected] Subject: Re: [Pharo-project] FFI error message: Heisenbug On Sun, Mar 25, 2012 at 9:55 AM, Schwab,Wilhelm K <[email protected]<mailto:[email protected]>> wrote: I started asking whether the setter function might somehow not be visible through my wrapper .so. Running objdump -T /home/bills/Work2010/gslWrapper/bin/Release/libgslWrapper.so | grep gsl_multifit_fdfsolver_set gives nothing, but my experience has been the wrapper "magically" exports everything from blas and gsl, but I'm not sure how to list all of the exports. Regardless, Alien lookup:'gsl_multifit_fdfsolver_set' inLibrary:'libgslWrapper.so' returns an Alien with a handle, so can I assume that the function is indeed exported by the wrapper? yes. But have you thought to confirm by trying Alien lookup:'this_is_not_in_the_library' inLibrary:'libgslWrapper.so' ? Bill ________________________________ From: [email protected]<mailto:[email protected]> [[email protected]<mailto:[email protected]>] on behalf of Schwab,Wilhelm K [[email protected]<mailto:[email protected]>] Sent: Sunday, March 25, 2012 12:36 PM To: [email protected]<mailto:[email protected]> Subject: [Pharo-project] FFI error message: Heisenbug I'm working on GSL+callbacks, and have hit a genuine Heisenbug - the behavior changes depending on when/where I break and/or step over or into code. Callbacks are getting hit successfully(!!!) but there is one function that crashes, unless I step over the call, in which case I get an error. In particular, if I step far enough into things to see the call, calling gsl_multifit_fdfsolver_set() is raising an error (vs. crashing if I don't look<g>) that says 'No module to load address from'. Anybody know what that means? I'm using the CogVM on Ubuntu Lucid. Bill -- best, Eliot
