Trace libc open function using Frida.

frida_trace_open.js

var target_fn = "open"

//target module can be set to null, but it will cause lower speed.
var target_module = "libc.so"

var callback_obj = 
{
	onEnter: function (args) {
		var path = Memory.readUtf8String(args[0]);
		path = path.replace("\n","");
		console.log("Path:" + path  + "\t\t    Flag:"+args[1])
	},
	onLeave: function (retval) {
		
	}
}


{
	var target_addr =  Module.findExportByName(target_module,target_fn);
	Interceptor.attach(target_addr, callback_obj);
}