Add tests for __int128 display for platforms that support it.
__int128s are dumped as hex values.
Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
---
tools/testing/selftests/bpf/prog_tests/btf_dump.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/btf_dump.c b/tools/testing/selftests/bpf/prog_tests/btf_dump.c
index 0b4ba53..52ccf0c 100644
--- a/tools/testing/selftests/bpf/prog_tests/btf_dump.c
+++ b/tools/testing/selftests/bpf/prog_tests/btf_dump.c
@@ -327,6 +327,14 @@ static int btf_dump_data(struct btf *btf, struct btf_dump *d,
static void test_btf_dump_int_data(struct btf *btf, struct btf_dump *d,
char *str)
{
+#ifdef __SIZEOF_INT128__
+ __int128 i = 0xffffffffffffffff;
+
+ /* this dance is required because we cannot directly initialize
+ * a 128-bit value to anything larger than a 64-bit value.
+ */
+ i = (i << 64) | (i - 1);
+#endif
/* simple int */
TEST_BTF_DUMP_DATA_C(btf, d, NULL, str, int, BTF_F_COMPACT, 1234);
TEST_BTF_DUMP_DATA(btf, d, NULL, str, int, BTF_F_COMPACT | BTF_F_NONAME,
@@ -348,6 +356,15 @@ static void test_btf_dump_int_data(struct btf *btf, struct btf_dump *d,
TEST_BTF_DUMP_DATA(btf, d, NULL, str, int, 0, "(int)-4567", -4567);
TEST_BTF_DUMP_DATA_OVER(btf, d, NULL, str, int, sizeof(int)-1, "", 1);
+
+#ifdef __SIZEOF_INT128__
+ TEST_BTF_DUMP_DATA(btf, d, NULL, str, __int128, BTF_F_COMPACT,
+ "(__int128)0xffffffffffffffff",
+ 0xffffffffffffffff);
+ ASSERT_OK(btf_dump_data(btf, d, "__int128", NULL, 0, &i, 16, str,
+ "(__int128)0xfffffffffffffffffffffffffffffffe"),
+ "dump __int128");
+#endif
}
static void test_btf_dump_float_data(struct btf *btf, struct btf_dump *d,
--
1.8.3.1
