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runc/libcontainer/system/proc_test.go
W. Trevor King 2bea4c897e libcontainer/system/proc: Add Stat_t.State
And Stat_t.PID and Stat_t.Name while we're at it.  Then use the new
.State property in runType to distinguish between running and
zombie/dead processes, since kill(2) does not [1].  With this change
we no longer claim Running status for zombie/dead processes.

I've also removed the kill(2) call from runType.  It was originally
added in 13841ef3 (new-api: return the Running state only if the init
process is alive, 2014-12-23), but we've been accessing
/proc/[pid]/stat since 14e95b2a (Make state detection precise,
2016-07-05, #930), and with the /stat access the kill(2) check is
redundant.

I also don't see much point to the previously-separate
doesInitProcessExist, so I've inlined that logic in runType.

It would be nice to distinguish between "/proc/[pid]/stat doesn't
exist" and errors parsing its contents, but I've skipped that for the
moment.

The Running -> Stopped change in checkpoint_test.go is because the
post-checkpoint process is a zombie, and with this commit zombie
processes are Stopped (and no longer Running).

[1]: https://github.com/opencontainers/runc/pull/1483#issuecomment-307527789

Signed-off-by: W. Trevor King <wking@tremily.us>
2017-06-20 16:26:55 -07:00

46 lines
1.7 KiB
Go

package system
import "testing"
func TestParseStartTime(t *testing.T) {
data := map[string]Stat_t{
"4902 (gunicorn: maste) S 4885 4902 4902 0 -1 4194560 29683 29929 61 83 78 16 96 17 20 0 1 0 9126532 52965376 1903 18446744073709551615 4194304 7461796 140733928751520 140733928698072 139816984959091 0 0 16781312 137447943 1 0 0 17 3 0 0 9 0 0 9559488 10071156 33050624 140733928758775 140733928758945 140733928758945 140733928759264 0": {
PID: 4902,
Name: "gunicorn: maste",
State: 'S',
StartTime: 9126532,
},
"9534 (cat) R 9323 9534 9323 34828 9534 4194304 95 0 0 0 0 0 0 0 20 0 1 0 9214966 7626752 168 18446744073709551615 4194304 4240332 140732237651568 140732237650920 140570710391216 0 0 0 0 0 0 0 17 1 0 0 0 0 0 6340112 6341364 21553152 140732237653865 140732237653885 140732237653885 140732237656047 0": {
PID: 9534,
Name: "cat",
State: 'R',
StartTime: 9214966,
},
"24767 (irq/44-mei_me) S 2 0 0 0 -1 2129984 0 0 0 0 0 0 0 0 -51 0 1 0 8722075 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 0 0 0 17 1 50 1 0 0 0 0 0 0 0 0 0 0 0": {
PID: 24767,
Name: "irq/44-mei_me",
State: 'S',
StartTime: 8722075,
},
}
for line, expected := range data {
st, err := parseStat(line)
if err != nil {
t.Fatal(err)
}
if st.PID != expected.PID {
t.Fatalf("expected PID %q but received %q", expected.PID, st.PID)
}
if st.State != expected.State {
t.Fatalf("expected state %q but received %q", expected.State, st.State)
}
if st.Name != expected.Name {
t.Fatalf("expected name %q but received %q", expected.Name, st.Name)
}
if st.StartTime != expected.StartTime {
t.Fatalf("expected start time %q but received %q", expected.StartTime, st.StartTime)
}
}
}