ADOOR_ACE/node_modules/dtrace-provider/test/gc.js

// expected output:
// 
// $ sudo dtrace -Zn 'nodeapp*:::gcprobe{ trace(arg0); }' -c 'node --expose_gc test/gc.js'
// Dtrace: description 'nodeapp*:::gcprobe' matched 0 probes
// dtrace: pid 66257 has exited
// CPU     ID                    FUNCTION:NAME
//   1   1778                  gcprobe:gcprobe        4320227343

var d = require('../dtrace-provider');
var dtp = d.createDTraceProvider("nodeapp");

// don't assign the returned probe object anywhere
dtp.addProbe("gcprobe", "int");
dtp.enable();

// run GC
gc();

// probe object should still be around
dtp.fire("gcprobe", function() {
    return [];
});