Where are core dump files produced by "node --abort-on-uncaught-exception" located?

Question

I just read this blog post by Netflix - excellent read. I have been playing around a bit with the tools etc. mentioned; especially with generating core dumps on uncaught exceptions by setting the --abort-on-uncaught-exception flag. This is also described here for instance. I think it is working so far with a simple test script (that does nothing but throw an error), as I see this output:

Uncaught Error: foo

FROM
run (/tmp/test/index.js:4:9)
wrapper [as _onTimeout] (timers.js:265:14)
Timer.listOnTimeout (timers.js:110:15)
[1]    18165 illegal hardware instruction (core dumped)  node --abort-on-uncaught-exception index.js

However, it seems like I am too stupid to locate the actual core dump file that this experiment should produce (?). I looked at /var/cores/ and /opt/cores/ which were mentioned somewhere on the web - but these directories don't exist. a quick find / -name core -type f did not yield anything useful either. What am I missing?

EDIT: node version is v0.12.0.

Answer 1

Ah, nevermind. Perfect example of rubberducking... Just figured out that core files are not created if ulimit -c is set to 0, which was the case on my machine (see e.g. here). Adjusting this setting made the core file pop up in the working directory.

Answer 2

For me on MacOSX they seem to be deposited in the /cores directory e.g. /cores/core.5748. As you mentioned you need to run ulimit -c unlimited to tell the OS to save core files.