github.com/MerlinKodo/gvisor@v0.0.0-20231110090155-957f62ecf90e/pkg/sentry/kernel/timekeeper_state.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package kernel
    16  
    17  import (
    18  	"github.com/MerlinKodo/gvisor/pkg/sentry/time"
    19  )
    20  
    21  // beforeSave is invoked by stateify.
    22  func (t *Timekeeper) beforeSave() {
    23  	if t.stop != nil {
    24  		panic("pauseUpdates must be called before Save")
    25  	}
    26  
    27  	// N.B. we want the *offset* monotonic time.
    28  	var err error
    29  	if t.saveMonotonic, err = t.GetTime(time.Monotonic); err != nil {
    30  		panic("unable to get current monotonic time: " + err.Error())
    31  	}
    32  
    33  	if t.saveRealtime, err = t.GetTime(time.Realtime); err != nil {
    34  		panic("unable to get current realtime: " + err.Error())
    35  	}
    36  }
    37  
    38  // afterLoad is invoked by stateify.
    39  func (t *Timekeeper) afterLoad() {
    40  	t.restored = make(chan struct{})
    41  }