darwinkit

Darwin scripts toolbox: DTrace and GDB scripts, housekeeping. See lxperf for Linux.

OSX DTrace gotchas

• there is no progenyof -- mach_trace.d has to track its children manually
• unordered events due to DTrace having per-cpu buffers and threads migrating between cores;

  • OSX has no core affinity API

  • no -x temporal too (what is temporal)

  • workaround for machtrace.d:

      # column 2 should print the elapsed execution time
      dtrace -x evaltime=exec -Cs sys/machtrace.d -c ./a.out | sort -n -k2
    

launchd stuff

• insecure.shell -- helps you learn how screwed your launchd daemon/agent environment is
  • run client: socat tcp-connect:localhost:12345 readline
  • make sure you have socat installed at /usr/local/bin! (use homebrew)