gistfile1.txt

// javascript:

var d = require('./lib/dtprovider');

var dtp = d.createDTraceProvider("nodeapp");
dtp.addProbe("probe1", "int");
dtp.addProbe("probe2", "char *");
dtp.enable();
dtp.fire("probe1", function(p) { return 42; });
dtp.fire("probe2", function(p) { return "hello, dtrace"; });

// and then:

$ sudo dtrace -Z -n 'nodeapp*:::probe1{ trace(arg0); }' \
                 -n 'nodeapp*:::probe2{ trace(copyinstr(arg0)); }'                                       
dtrace: description 'nodeapp*:::probe1' matched 0 probes
dtrace: description 'nodeapp*:::probe2' matched 0 probes
CPU     ID                    FUNCTION:NAME
  0  23641                      func:probe1                42
  0  23642                      func:probe2   hello, dtrace