58 lines
1.8 KiB
Go
58 lines
1.8 KiB
Go
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package mm
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import (
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"fmt"
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"gvisor.googlesource.com/gvisor/pkg/sentry/context"
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)
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// InvalidateUnsavable invokes memmap.Mappable.InvalidateUnsavable on all
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// Mappables mapped by mm.
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func (mm *MemoryManager) InvalidateUnsavable(ctx context.Context) error {
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mm.mappingMu.RLock()
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defer mm.mappingMu.RUnlock()
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for vseg := mm.vmas.FirstSegment(); vseg.Ok(); vseg = vseg.NextSegment() {
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if vma := vseg.ValuePtr(); vma.mappable != nil {
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if err := vma.mappable.InvalidateUnsavable(ctx); err != nil {
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return err
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}
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}
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}
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return nil
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}
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// beforeSave is invoked by stateify.
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func (mm *MemoryManager) beforeSave() {
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mem := mm.p.Memory()
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for pseg := mm.pmas.FirstSegment(); pseg.Ok(); pseg = pseg.NextSegment() {
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if pma := pseg.ValuePtr(); pma.file != mem {
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// InvalidateUnsavable should have caused all such pmas to be
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// invalidated.
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panic(fmt.Sprintf("Can't save pma %#v with non-Memory file of type %T:\n%s", pseg.Range(), pma.file, mm))
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}
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}
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}
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// afterLoad is invoked by stateify.
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func (mm *MemoryManager) afterLoad() {
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mm.haveASIO = mm.p.SupportsAddressSpaceIO()
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mem := mm.p.Memory()
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for pseg := mm.pmas.FirstSegment(); pseg.Ok(); pseg = pseg.NextSegment() {
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pseg.ValuePtr().file = mem
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}
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}
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