Function TestStringSection

elf_reader_test.go:522–578

(t *testing.T)

}

func TestStringSection(t *testing.T) {
	file := testutils.NativeFile(t, "testdata/strings-%s.elf")
	spec, err := LoadCollectionSpec(file)
	if err != nil {
		t.Fatalf("load collection spec: %s", err)
	}

	for name := range spec.Maps {
		t.Log(name)
	}

	strMap := spec.Maps[".rodata.str1.1"]
	if strMap == nil {
		t.Fatal("Unable to find map '.rodata.str1.1' in loaded collection")
	}

	if !strMap.readOnly() {
		t.Fatal("Read only data maps should be frozen")
	}

	if strMap.Flags != sys.BPF_F_RDONLY_PROG {
		t.Fatal("Read only data maps should have the prog-read-only flag set")
	}

	coll, err := newCollection(t, spec, nil)
	testutils.SkipIfNotSupported(t, err)
	if err != nil {
		t.Fatalf("new collection: %s", err)
	}

	prog := coll.Programs["filter"]
	if prog == nil {
		t.Fatal("program not found")
	}

	testMap := coll.Maps["my_map"]
	if testMap == nil {
		t.Fatal("test map not found")
	}

	_, err = prog.Run(&RunOptions{
		Data: internal.EmptyBPFContext, // Min size for XDP programs
	})
	if err != nil {
		t.Fatalf("prog run: %s", err)
	}

	key := []byte("This string is allocated in the string section\n\x00")
	var value uint32
	if err = testMap.Lookup(&key, &value); err != nil {
		t.Fatalf("test map lookup: %s", err)
	}

	if value != 1 {
		t.Fatal("Test map value not 1!")
	}
}