increase mmap size

src/main.rs

@@ -7,7 +7,7 @@ use std::fs::File;
 use std::os::fd::AsRawFd;
 use std::{env, ptr};
 
-const SHARED_MEMORY_SIZE: usize = 1024;
+const SHARED_MEMORY_SIZE: usize = 1024 * 1024;
 
 #[link(name = "agent")]
 extern "C" {