Fix a memory leak

libloadviz/src/bin/stressload.rs

@@ -0,0 +1,14 @@
+//! This binary is here to provoke memory leaks in getting the load counters
+
+use std::process;
+
+use libloadviz::system_load::get_load_counters;
+
+fn main() {
+    println!("PID {} now sleeping for 10s", process::id());
+    std::thread::sleep(std::time::Duration::from_secs(10));
+    println!("Now getting load counters");
+    loop {
+        get_load_counters();
+    }
+}

libloadviz/src/system_load.rs

@@ -35,6 +35,14 @@ pub fn get_load_counters() -> Vec<LoadCounters> {
         });
     }
 
+    unsafe {
+        libc::vm_deallocate(
+            libc::mach_task_self(),
+            cpu_info as libc::vm_address_t,
+            num_cpu_info.try_into().unwrap(),
+        );
+    }
+
     return load_counters;
 }