gistfile1.js

var frida = require('frida');

var script = `

recv('getModules', function() {

  var modules = [];

  Process.enumerateModules({
    onMatch: function(module) {
      modules.push(module);
    },
    onComplete: function() {
      send({
        name: "getModules",
        data: modules
      });
    }
  });

});

recv('getExports', function(data) {
  console.log(JSON.stringify(data));
});

`;

frida.attach(process.argv[2]).then(function(session) {

  session.createScript(script).then(function(script) {

    script.events.listen("message", function(message) {

      var { name, data } = message.payload;

      if(name === "getModules") {

        console.log("Got", data.length, "modules");

        // we have modules, try and get exports for 2 random ones
        var one = data[Math.floor(Math.random()*data.length)];
        var two = data[Math.floor(Math.random()*data.length)];

        console.log("Trying", one.name, "&", two.name);

        [ one, two ].forEach(function(mod) {

          script.postMessage({
            type: "getExports",
            payload: {
              name: mod.name
            }
          });

        });

      } else {
        console.log(name, data);
      }

    });

    script.load().then(function() {
      console.log("loaded");

      script.postMessage({
        type: "getModules"
      });

    }).catch(err);

  }).catch(err);

}).catch(err);

function err(e) {
  console.log(e);
}

out

➜  ex  sudo babel-node test hello
loaded
Got 42 modules
Trying libsystem_network.dylib & libdyld.dylib
{"type":"getExports","payload":{"name":"libsystem_network.dylib"}}
➜  ex