Use cached state instead of runc state.

Signed-off-by: Lantao Liu <lantaol@google.com>

pkg/process/init.go

@@ -56,12 +56,14 @@ type Init struct {
 
 	WorkDir string
 
-	id           string
-	Bundle       string
-	console      console.Console
-	Platform     stdio.Platform
-	io           *processIO
-	runtime      *runc.Runc
+	id       string
+	Bundle   string
+	console  console.Console
+	Platform stdio.Platform
+	io       *processIO
+	runtime  *runc.Runc
+	// pausing preserves the pausing state.
+	pausing      *atomicBool
 	status       int
 	exited       time.Time
 	pid          safePid
@@ -97,6 +99,7 @@ func New(id string, runtime *runc.Runc, stdio stdio.Stdio) *Init {
 	p := &Init{
 		id:        id,
 		runtime:   runtime,
+		pausing:   new(atomicBool),
 		stdio:     stdio,
 		status:    0,
 		waitBlock: make(chan struct{}),
@@ -237,17 +240,14 @@ func (p *Init) ExitedAt() time.Time {
 
 // Status of the process
 func (p *Init) Status(ctx context.Context) (string, error) {
+	if p.pausing.get() {
+		return "pausing", nil
+	}
+
 	p.mu.Lock()
 	defer p.mu.Unlock()
 
-	c, err := p.runtime.State(ctx, p.id)
-	if err != nil {
-		if strings.Contains(err.Error(), "does not exist") {
-			return "stopped", nil
-		}
-		return "", p.runtimeError(err, "OCI runtime state failed")
-	}
-	return c.Status, nil
+	return p.initState.Status(ctx)
 }
 
 // Start the init process