[PATCH v2 bpf-next 2/3] selftests/bpf: add __int128-specific tests for typed data dump
From: Alan Maguire <hidden>
Date: 2021-07-20 08:56:32
Also in:
bpf
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [selftests] (test runners & infrastructure), kernel selftest framework, the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Shuah Khan, Linus Torvalds
Add tests for __int128 display for platforms that support it. __int128s are dumped as hex values. Signed-off-by: Alan Maguire <redacted> --- 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,
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1.8.3.1