It appears as if that did not solve the problem, though I verified that it did what was intended. This is unfortunate. I'll continue looking at this for a day or two but I'm not confident I can find a solution alone. Here is a minimal set of code to replicate: https://gist.github.com/iamed2/e883c6b0b8ff4220d946
On Wednesday, 4 March 2015 06:06:19 UTC-6, Tim Holy wrote: > > It seems possible we should add a second "boolean" argument to _julia_init > (in > init.c) that controls whether the signal handlers get set. But as a > workaround: > > http://stackoverflow.com/questions/9495113/how-to-get-the-handlers-name-address-for-some-signals-e-g-sigint-in-postgres > > > You could at least test whether that solves the problem, and then if so > perhaps it would be worth opening an issue in julia about whether we need > a > better solution. > > BTW, I'm interested in this topic too; see also > https://groups.google.com/d/msg/julia-users/dP_J5KilsEs/4CIERQ14vdgJ. We > should collaborate on a single solution (and it sounds like you're farther > along and perhaps more invested). I'm happy to pitch in if code gets > posted > somewhere. > > --Tim > > On Tuesday, March 03, 2015 09:18:04 PM Eric Davies wrote: > > Hi all, > > > > I'm attempting to embed julia in a MATLAB MEX file. Everything is going > > great, but MATLAB will sometimes segfault after having run some code > > calling Julia.* I believe I have narrowed it down to this > > issue: http://ubuntuforums.org/showthread.php?t=2093057 . Basically, I > > believe Julia is registering a SIGSEGV (or maybe other signal?) handler > > that overwrites the default for the JVM set by MATLAB. after the Julia > > function is done, that memory is freed. Then a segfault (or maybe other > > signal?) happens in the JVM and it tries to call Julia's handler but > > segfaults (again) as it is no longer there. > > > > Can anyone help me find a workaround? Perhaps if there's a way to > > "deregister" the handler, or if someone knows a way to get the current > > handler (before calling into Julia) and then setting it back to that > after > > Julia is done. > > > > I've never dealt with signals in C before so I apologize if I'm > describing > > things incorrectly or missing something. > > > > Thanks, > > Eric > > > > *I am able to reliably reproduce this by running any MEX function > linking > > to Julia and calling jl_init, then calling `help clear` in MATLAB. > > > > P.S.: I'm on Mac OS X 10.10 with MATLAB R2012b and Julia > v0.3.6/v0.4.0-dev > >
