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update map cleanup process #20

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Merged
egmc merged 1 commit into from
Apr 4, 2026
Merged

update map cleanup process #20

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24 changes: 18 additions & 6 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -536,11 +536,16 @@ func displayMapContents(ctx context.Context, bpfMap *bpf.BPFMap) {

iter := bpfMap.Iterator()
count := 0
var keysToDelete [][]byte

for iter.Next() {
keyBytes := iter.Key()

v, _ := bpfMap.GetValue(unsafe.Pointer(&keyBytes[0]))
v, err := bpfMap.GetValue(unsafe.Pointer(&keyBytes[0]))
if err != nil {
slog.Warn("Failed to get value from BPF map", "error", err)
continue
}

filename := cstring(keyBytes)
slog.Info(filename)
Expand All @@ -557,9 +562,9 @@ func displayMapContents(ctx context.Context, bpfMap *bpf.BPFMap) {
var n int64

buf := bytes.NewReader(v)
err := binary.Read(buf, binary.LittleEndian, &n)
if err != nil {
panic(err)
if err := binary.Read(buf, binary.LittleEndian, &n); err != nil {
slog.Warn("Failed to read timestamp from BPF map value", "filename", filename, "error", err, "value_len", len(v))
continue
}

boottime, _ := getBootTimeUnix()
Expand All @@ -578,12 +583,19 @@ func displayMapContents(ctx context.Context, bpfMap *bpf.BPFMap) {
tLocal := t.Local()
slog.Info(tLocal.Format(time.RFC3339))

bpfMap.DeleteKey(unsafe.Pointer(&keyBytes[0]))
slog.Info(filename + " deleted")
// Collect key for deletion after iteration
keyCopy := make([]byte, len(keyBytes))
copy(keyCopy, keyBytes)
keysToDelete = append(keysToDelete, keyCopy)
count++

}

// Delete keys after iteration to avoid corrupting the iterator
for _, key := range keysToDelete {
bpfMap.DeleteKey(unsafe.Pointer(&key[0]))
}

if count == 0 {
fmt.Println("No data yet...")
} else {
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