diff options
Diffstat (limited to 'pkg/sentry/fs/proc/task.go')
| -rw-r--r-- | pkg/sentry/fs/proc/task.go | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/pkg/sentry/fs/proc/task.go b/pkg/sentry/fs/proc/task.go index 3e9a1e50e..147d57a8f 100644 --- a/pkg/sentry/fs/proc/task.go +++ b/pkg/sentry/fs/proc/task.go @@ -81,6 +81,7 @@ func newTaskDir(t *kernel.Task, msrc *fs.MountSource, pidns *kernel.PIDNamespace "mounts": seqfile.NewSeqFileInode(t, &mountsFile{t: t}, msrc), "ns": newNamespaceDir(t, msrc), "stat": newTaskStat(t, msrc, showSubtasks, pidns), + "statm": newStatm(t, msrc), "status": newStatus(t, msrc, pidns), "uid_map": newUIDMap(t, msrc), }, fs.RootOwner, fs.FilePermsFromMode(0555)) @@ -389,6 +390,40 @@ func (s *taskStatData) ReadSeqFileData(h seqfile.SeqHandle) ([]seqfile.SeqData, return []seqfile.SeqData{{Buf: buf.Bytes(), Handle: (*taskStatData)(nil)}}, 0 } +// statmData implements seqfile.SeqSource for /proc/[pid]/statm. +type statmData struct { + t *kernel.Task +} + +func newStatm(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { + return newFile(seqfile.NewSeqFile(t, &statmData{t}), msrc, fs.SpecialFile, t) +} + +// NeedsUpdate implements seqfile.SeqSource.NeedsUpdate. +func (s *statmData) NeedsUpdate(generation int64) bool { + return true +} + +// ReadSeqFileData implements seqfile.SeqSource.ReadSeqFileData. +func (s *statmData) ReadSeqFileData(h seqfile.SeqHandle) ([]seqfile.SeqData, int64) { + if h != nil { + return nil, 0 + } + + var vss, rss uint64 + s.t.WithMuLocked(func(t *kernel.Task) { + if mm := t.MemoryManager(); mm != nil { + vss = mm.VirtualMemorySize() + rss = mm.ResidentSetSize() + } + }) + + var buf bytes.Buffer + fmt.Fprintf(&buf, "%d %d 0 0 0 0 0\n", vss/usermem.PageSize, rss/usermem.PageSize) + + return []seqfile.SeqData{{Buf: buf.Bytes(), Handle: (*statmData)(nil)}}, 0 +} + // statusData implements seqfile.SeqSource for /proc/[pid]/status. type statusData struct { t *kernel.Task |