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tetragon: debugging map duplication extending prog/map testers #2455

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May 22, 2024
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tetragon: debugging map duplication extending prog/map testers #2455

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48 changes: 27 additions & 21 deletions pkg/testutils/sensors/load.go
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Original file line number Diff line number Diff line change
Expand Up @@ -53,23 +53,25 @@ type prog struct {
mark bool
}

func findProgram(cache []*prog, name string, typ ebpf.ProgramType, match ProgMatch) *prog {
func findProgram(cache []*prog, name string, typ ebpf.ProgramType, match ProgMatch) []*prog {
var p []*prog

for _, c := range cache {
if c.prog.Type != typ {
continue
}
switch match {
case ProgMatchPartial:
if strings.Contains(c.name, name) {
return c
p = append(p, c)
}
case ProgMatchFull:
if c.name == name {
return c
p = append(p, c)
}
}
}
return nil
return p
}

func mergeSensorMaps(t *testing.T, maps1, maps2 []SensorMap, progs1, progs2 []SensorProg) ([]SensorMap, []SensorProg) {
Expand Down Expand Up @@ -188,12 +190,14 @@ func CheckSensorLoad(sensors []*sensors.Sensor, sensorMaps []SensorMap, sensorPr

// check that we loaded expected programs
for _, tp := range sensorProgs {
c := findProgram(cache, tp.Name, tp.Type, tp.Match)
if c == nil {
cs := findProgram(cache, tp.Name, tp.Type, tp.Match)
if len(cs) == 0 {
t.Fatalf("could not find program %v in sensor", tp.Name)
}
c.mark = true
t.Logf("Found prog %v type %s\n", c.name, c.prog.Type)
for _, c := range cs {
c.mark = true
t.Logf("Found prog %v type %s\n", c.name, c.prog.Type)
}
}

var extra bool
Expand Down Expand Up @@ -224,26 +228,28 @@ func CheckSensorLoad(sensors []*sensors.Sensor, sensorMaps []SensorMap, sensorPr
for _, idx := range tm.Progs {
tp := sensorProgs[idx]

c := findProgram(cache, tp.Name, tp.Type, tp.Match)
if c == nil {
cs := findProgram(cache, tp.Name, tp.Type, tp.Match)
if len(cs) == 0 {
t.Fatalf("could not find program %v in sensor\n", tp.Name)
}

m := findMapForProg(c.coll, tm.Name, c.prog)
if m == nil {
t.Fatalf("could not find map %v in program %v\n", tm.Name, tp.Name)
}
for _, c := range cs {
m := findMapForProg(c.coll, tm.Name, c.prog)
if m == nil {
t.Fatalf("could not find map %v in program %v\n", tm.Name, tp.Name)
}

t.Logf("\tFound map %v id %v in prog %v\n", tm.Name, m.ID, tp.Name)
t.Logf("\tFound map %v id %v in prog %v\n", tm.Name, m.ID, tp.Name)

if sharedId == 0 {
sharedId = m.ID
}
if sharedId == 0 {
sharedId = m.ID
}

if m.ID != sharedId {
t.Fatalf("map %v has wrong shared id %v != %v\n", tm.Name, m.ID, sharedId)
if m.ID != sharedId {
t.Fatalf("map %v has wrong shared id %v != %v\n", tm.Name, m.ID, sharedId)
}
c.mark = true
}
c.mark = true
}

// check that rest of the loaded programs DO NOT share the map
Expand Down
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