relab/frida/frida_scripts/printStrings.js

var objc_copyClassNamesForImage = new NativeFunction(
    Module.findExportByName(null, 'objc_copyClassNamesForImage'),
    'pointer',
    ['pointer', 'pointer']
);
var free = new NativeFunction(Module.findExportByName(null, 'free'), 'void', ['pointer']);
var classes = new Array(count);
var p = Memory.alloc(Process.pointerSize);

Memory.writeUInt(p, 0);

var path = ObjC.classes.NSBundle.mainBundle().executablePath().UTF8String();
var pPath = Memory.allocUtf8String(path);
var pClasses = objc_copyClassNamesForImage(pPath, p);
var count = Memory.readUInt(p);
for (var i = 0; i < count; i++) {
    var pClassName = Memory.readPointer(pClasses.add(i * Process.pointerSize));
    classes[i] = Memory.readUtf8String(pClassName);
}

free(pClasses);

var tree = {};
classes.forEach(function(name) {
    var clazz = ObjC.classes[name];
    var chain = [name];
    while (clazz = clazz.$superClass) {
        chain.unshift(clazz.$className);
    }

    var node = tree;
    chain.forEach(function(clazz) {
        node[clazz] = node[clazz] || {};
        node = node[clazz];
    });
});

send(tree);