internal/tracefs: skip some tests on non-Linux platforms

Signed-off-by: Lorenz Bauer <lmb@isovalent.com>

internal/tracefs/kprobe.go

@@ -113,6 +113,10 @@ func sanitizeTracefsPath(path ...string) (string, error) {
 // but may be also be available at /sys/kernel/debug/tracing if debugfs is mounted.
 // The available tracefs paths will depends on distribution choices.
 var getTracefsPath = sync.OnceValues(func() (string, error) {
+	if runtime.GOOS != "linux" {
+		return "", fmt.Errorf("tracefs: %w", internal.ErrNotSupportedOnOS)
+	}
+
 	for _, p := range []struct {
 		path   string
 		fsType int64

internal/tracefs/kprobe_test.go

@@ -6,6 +6,8 @@ import (
 	"testing"
 
 	"github.com/go-quicktest/qt"
+
+	"github.com/cilium/ebpf/internal/testutils"
 )
 
 // Global symbol, present on all tested kernels.
@@ -63,6 +65,7 @@ func TestNewEvent(t *testing.T) {
 			args.Group, _ = RandomGroup("ebpftest")
 
 			evt, err := NewEvent(args)
+			testutils.SkipIfNotSupportedOnOS(t, err)
 			qt.Assert(t, qt.IsNil(err))
 			defer evt.Close()
 

internal/tracefs/perf_event_test.go

@@ -3,20 +3,24 @@ package tracefs
 import (
 	"errors"
 	"fmt"
+	"os"
 	"testing"
 
 	"github.com/go-quicktest/qt"
+
+	"github.com/cilium/ebpf/internal/testutils"
 )
 
 func TestEventID(t *testing.T) {
-
 	eid, err := EventID("syscalls", "sys_enter_mmap")
+	testutils.SkipIfNotSupportedOnOS(t, err)
 	qt.Assert(t, qt.IsNil(err))
 	qt.Assert(t, qt.Not(qt.Equals(eid, 0)))
 }
 
 func TestSanitizePath(t *testing.T) {
 	_, err := sanitizeTracefsPath("../escaped")
+	testutils.SkipIfNotSupportedOnOS(t, err)
 	if !errors.Is(err, ErrInvalidInput) {
 		t.Errorf("expected error %s, got: %s", ErrInvalidInput, err)
 	}
@@ -80,6 +84,9 @@ func TestSanitizeIdentifier(t *testing.T) {
 }
 
 func TestGetTracefsPath(t *testing.T) {
-	_, err := getTracefsPath()
+	path, err := getTracefsPath()
+	testutils.SkipIfNotSupportedOnOS(t, err)
+	qt.Assert(t, qt.IsNil(err))
+	_, err = os.Stat(path)
 	qt.Assert(t, qt.IsNil(err))
 }