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Tue, 20 Jul 2021 08:50:09 +0000 From: Alan Maguire To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org Cc: kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, morbo@google.com, bpf@vger.kernel.org, netdev@vger.kernel.org, Alan Maguire Subject: [PATCH v2 bpf-next 2/3] selftests/bpf: add __int128-specific tests for typed data dump Date: Tue, 20 Jul 2021 09:49:52 +0100 Message-Id: <1626770993-11073-3-git-send-email-alan.maguire@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1626770993-11073-1-git-send-email-alan.maguire@oracle.com> References: <1626770993-11073-1-git-send-email-alan.maguire@oracle.com> X-ClientProxiedBy: DB6PR07CA0158.eurprd07.prod.outlook.com (2603:10a6:6:43::12) To BLAPR10MB5267.namprd10.prod.outlook.com (2603:10b6:208:30e::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (95.45.14.174) by DB6PR07CA0158.eurprd07.prod.outlook.com (2603:10a6:6:43::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4352.9 via Frontend Transport; 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Signed-off-by: Alan Maguire --- 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,