update code for runc related changes part 2

Signed-off-by: Arjun Raja Yogidas <arjunry@amazon.com>

Author: coderbirju

runtime/runc_jailer.go

@@ -675,13 +675,19 @@ func (j runcJailer) Stop(force bool) error {
 	return j.runcClient.Kill(j.ctx, j.vmID, int(signal), &runc.KillOpts{All: true})
 }
 
-// IsRunning checks if the runc container is still running.
+// IsRunning checks if the runc container's init process is still alive.
 func (j *runcJailer) IsRunning(ctx context.Context) bool {
 	state, err := j.runcClient.State(ctx, j.vmID)
 	if err != nil {
 		return false
 	}
-	return state.Status == "running" || state.Status == "created" || state.Status == "paused"
+	// Check if the init process (Firecracker) is still alive
+	if state.Pid > 0 {
+		// kill with signal 0 checks if process exists without sending a signal
+		err := syscall.Kill(state.Pid, 0)
+		return err == nil
+	}
+	return false
 }
 
 // setupCacheTopology will copy indexed contents from the cacheTopologyPath to