gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/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 (
    18  	"context"
    19  
    20  	"gvisor.dev/gvisor/pkg/abi/linux"
    21  )
    22  
    23  // +stateify savable
    24  type savedPendingSignal struct {
    25  	si    *linux.SignalInfo
    26  	timer *IntervalTimer
    27  }
    28  
    29  // saveSignals is invoked by stateify.
    30  func (p *pendingSignals) saveSignals() []savedPendingSignal {
    31  	var pending []savedPendingSignal
    32  	for _, q := range p.signals {
    33  		for ps := q.pendingSignalList.Front(); ps != nil; ps = ps.Next() {
    34  			pending = append(pending, savedPendingSignal{
    35  				si:    ps.SignalInfo,
    36  				timer: ps.timer,
    37  			})
    38  		}
    39  	}
    40  	return pending
    41  }
    42  
    43  // loadSignals is invoked by stateify.
    44  func (p *pendingSignals) loadSignals(_ context.Context, pending []savedPendingSignal) {
    45  	for _, sps := range pending {
    46  		p.enqueue(sps.si, sps.timer)
    47  	}
    48  }