github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/sentry/kernel/pending_signals_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 "github.com/SagerNet/gvisor/pkg/abi/linux"
    18  
    19  // +stateify savable
    20  type savedPendingSignal struct {
    21  	si    *linux.SignalInfo
    22  	timer *IntervalTimer
    23  }
    24  
    25  // saveSignals is invoked by stateify.
    26  func (p *pendingSignals) saveSignals() []savedPendingSignal {
    27  	var pending []savedPendingSignal
    28  	for _, q := range p.signals {
    29  		for ps := q.pendingSignalList.Front(); ps != nil; ps = ps.Next() {
    30  			pending = append(pending, savedPendingSignal{
    31  				si:    ps.SignalInfo,
    32  				timer: ps.timer,
    33  			})
    34  		}
    35  	}
    36  	return pending
    37  }
    38  
    39  // loadSignals is invoked by stateify.
    40  func (p *pendingSignals) loadSignals(pending []savedPendingSignal) {
    41  	for _, sps := range pending {
    42  		p.enqueue(sps.si, sps.timer)
    43  	}
    44  }