1 files changed, 45 insertions, 0 deletions
diff --git a/pkg/sentry/state/state_metadata.go b/pkg/sentry/state/state_metadata.go
new file mode 100644
index 000000000..b8e128c40
--- /dev/null
+++ b/pkg/sentry/state/state_metadata.go
@@ -0,0 +1,45 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package state
+
+import (
+	"fmt"
+	"time"
+
+	"gvisor.googlesource.com/gvisor/pkg/log"
+)
+
+// The save metadata keys for timestamp.
+const (
+	cpuUsage          = "cpu_usage"
+	metadataTimestamp = "timestamp"
+)
+
+func addSaveMetadata(m map[string]string) {
+	t, err := CPUTime()
+	if err != nil {
+		log.Warningf("Error getting cpu time: %v", err)
+	}
+	if previousMetadata != nil {
+		p, err := time.ParseDuration(previousMetadata[cpuUsage])
+		if err != nil {
+			log.Warningf("Error parsing previous runs' cpu time: %v", err)
+		}
+		t += p
+	}
+	m[cpuUsage] = t.String()
+
+	m[metadataTimestamp] = fmt.Sprintf("%v", time.Now())
+}