How to debug a C Port driver?

[Raimo Niskanen]

Just at tiny hint:
os:getpid() from the erlang shell gives you the ID # of 
the emulator process.


fritchie@REDACTED (Scott Lystig Fritchie) writes:

> >>>>> " " == Casper  <casper2000a@REDACTED> writes:
> 
> > How can I debug a C port driver? Can use "gdb" for that?
> 
> It's been quite a while since I've done it, but this is what memory
> tells me.
> 
> 1. Run "erl" plus any extra flags.
> 
> 2. Trigger loading of your shared library, using whatever function
> that eventually calls erl_ddll:load_driver().
> 
> 3. Use "ps" to find process ID # of the "beam" process.
> 
> 4. Use gdb's "attach" command to attach to the beam PID.
> 
> 5. Set breakpoints and/or watchpoints.
> 
> 6. At the Erlang shell command line, call an Erlang function that will
> trigger your break/watch points.
> 
> -Scott

-- 

/ Raimo Niskanen, Erlang/OTP, Ericsson AB