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selftests/bpf: Add __int128-specific tests for typed data dump

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Add tests for __int128 display for platforms that support it.
__int128s are dumped as hex values.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/1626770993-11073-3-git-send-email-alan.maguire@oracle.com
This commit is contained in:
Alan Maguire 2021-07-20 09:49:52 +01:00 committed by Andrii Nakryiko
parent a1d3cc3c5e
commit a17553dde2
1 changed files with 17 additions and 0 deletions
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17
tools/testing/selftests/bpf/prog_tests/btf_dump.c
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@ -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,