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Wed, 16 Sep 2026 07:42:01 +0000 (GMT) Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.7/8.18.1.7) with ESMTP id 68G7e3A2014858; Wed, 16 Sep 2026 07:42:00 GMT Received: from pps.reinject (localhost [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 4gmw6au57j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 16 Sep 2026 07:42:00 +0000 (GMT) Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.18.1.12/8.18.1.12) with ESMTP id 68G7exQ1020284; Wed, 16 Sep 2026 07:41:59 GMT Received: from bpf.uk.oracle.com (dhcp-10-154-86-81.vpn.oracle.com [10.154.86.81]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 4gmw6au4u1-11; Wed, 16 Sep 2026 07:41:59 +0000 (GMT) From: Alan Maguire To: ast@kernel.org, andrii@kernel.org, eddyz87@gmail.com, jolsa@kernel.org Cc: daniel@iogearbox.net, ihor.solodrai@linux.dev, yonghong.song@linux.dev, song@kernel.org, qmo@kernel.org, martin.lau@linux.dev, memxor@gmail.com, emil@etsalapatis.com, bpf@vger.kernel.org, nsc@kernel.org, puranjay@kernel.org, yatsenko@meta.com, Alan Maguire Subject: [PATCH v3 bpf-next 10/11] selftests/bpf: Test bpftool dump of BTF location info Date: Wed, 16 Sep 2026 08:41:17 +0100 Message-ID: <20260916074118.1007116-11-alan.maguire@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20260916074118.1007116-1-alan.maguire@oracle.com> References: <20260916074118.1007116-1-alan.maguire@oracle.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-15_05,2026-09-15_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 lowpriorityscore=0 mlxlogscore=999 adultscore=0 phishscore=0 malwarescore=0 mlxscore=0 spamscore=0 suspectscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2609040000 definitions=main-2609160099 X-Proofpoint-GUID: 3qnMGV36s5BT6a9MAqO65znTvZGBXOno X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE2MDA5OSBTYWx0ZWRfX/2/ptOS4XFDf LO124mw3WgvyDXqI4frzBKJpEL9Z5FUgs2poLtT/KNJw3suDBSUW8hgcirORPF1RHKB6F9ZMfYp W4A7jJskftJGdySLG0rKB/YR8DjbZhVtH3lrr4o76p8sfjDjBa8R X-Proofpoint-ORIG-GUID: 3qnMGV36s5BT6a9MAqO65znTvZGBXOno X-Authority-Analysis: v=2.4 cv=c9k+0h9l c=1 sm=1 tr=0 ts=6aaa4849 b=1 cx=c_pps a=WeWmnZmh0fydH62SvGsd2A==:117 a=WeWmnZmh0fydH62SvGsd2A==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=x0eKOSpe3m1H3M0S9YoZ:22 a=yPCof4ZbAAAA:8 a=9B_al4-hnjAZ3VjU-jYA:9 a=WmVTiCyuxqgg3mnwYu6p:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE2MDA5OSBTYWx0ZWRfX5E62RBzrhOjW g7/J069RJutXM/UTEjaUKTJhmcAyJ78VeP9Z2rYGaBbU256+WI7mob45rOR1wRUoT9jkwBFA4t+ dGYm9XA8/wChjmFi/AVkTjqPacN+2hnAlzooRBnBpYeNnNliIy00Gidla5JtWAjpBWzNlfAbuG8 C137oQ+MUeZbBJ9mz+Om36UXjrSm3O/2BWR12umTA7WR8BDgbmOdY+q50D2xxNYZbSPckvKc1R1 gzRCQo2qPhT8bUWXutUuyK4n28Ag6avT7n2lSyQ5rJYLeItLagsgDHa8hPj/msvpOYx9ZH7CyTK p/hPSbqprjH9ExYIGJom8kDblfKhVkZ2bsS10xUMvewACcaGlGBWEU163Tj2W8ORQU5Ri5vjASZ vLcOyDDPrSDXu2oiCQiO0VD8/l2Z9NOo7KdbjYFFKQbo92zQnFWD/0QsyOQBiEBDEwKO6JGiViO BgfiGh/Fb8tyWtdWb6Q== Add a bpftool raw BTF dump test covering LOC_PARAM, LOC_PROTO, and LOCSEC types. Verify LOC_PARAM expressions, LOC_PROTO parameter values, and LOCSEC function name, type id, and offset output. Signed-off-by: Alan Maguire Assisted-by: OpenAI Codex (GPT 5.6) --- .../bpf/prog_tests/bpftool_btf_dump.c | 84 +++++++++++++++++++ 1 file changed, 84 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/bpftool_btf_dump.c b/tools/testing/selftests/bpf/prog_tests/bpftool_btf_dump.c index d5b25302b0c8..f8ea9dfd0780 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpftool_btf_dump.c +++ b/tools/testing/selftests/bpf/prog_tests/bpftool_btf_dump.c @@ -57,6 +57,35 @@ static struct btf *mk_btf(void) return btf; } +static struct btf *mk_loc_btf(void) +{ + struct btf *btf; + + btf = btf__new_empty(); + if (!ASSERT_OK_PTR(btf, "new_empty")) + return NULL; + + btf__add_int(btf, "int", 4, BTF_INT_SIGNED); + btf__add_func_proto(btf, 1); + btf__add_func_param(btf, "arg1", 1); + btf__add_func_param(btf, "arg2", 1); + btf__add_func(btf, "foo", BTF_FUNC_STATIC, 2); + + btf__add_loc_param(btf, 4, BTF_LOC_PARAM_REG); + btf__add_loc_param_value(btf, 1); + btf__add_loc_param(btf, 8, BTF_LOC_PARAM_REG | + BTF_LOC_PARAM_DEREF | BTF_LOC_PARAM_OFFSET); + btf__add_loc_param_value(btf, 2); + btf__add_loc_param_value(btf, 0x10); + btf__add_loc_proto(btf); + btf__add_loc_proto_param(btf, 4); + btf__add_loc_proto_param(btf, 5); + btf__add_locsec(btf, "inline.text"); + btf__add_locsec_loc(btf, 3, 6, 64); + + return btf; +} + static int btf_to_tmpfile(const struct btf *btf, char *path) { ssize_t written; @@ -105,6 +134,26 @@ static char *dump_c(const char *btf_path, bool sorted) return buf; } +static char *dump_raw(const char *btf_path) +{ + char args[MAX_BPFTOOL_CMD_LEN]; + char *buf; + int err; + + buf = malloc(DUMP_BUF_SZ); + if (!ASSERT_OK_PTR(buf, "alloc_dump")) + return NULL; + + snprintf(args, sizeof(args), "btf dump file %s", btf_path); + err = get_bpftool_command_output(args, buf, DUMP_BUF_SZ); + if (!ASSERT_OK(err, "btf_dump_raw")) { + free(buf); + return NULL; + } + + return buf; +} + static char *read_expected(const char *path) { char *buf = NULL; @@ -155,6 +204,31 @@ static void test_dump(const char *btf_path, bool sorted) free(dump); } +static void test_loc_dump(const char *btf_path) +{ + const char expected[] = + "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED\n" + "[2] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n" + "\t'arg1' type_id=1\n" + "\t'arg2' type_id=1\n" + "[3] FUNC 'foo' type_id=2 linkage=static\n" + "[4] LOC_PARAM '(anon)' size=4 flags=0x8 vlen=1 values='r1'\n" + "[5] LOC_PARAM '(anon)' size=8 flags=0x38 vlen=2 values='*(r2 + 0x10)'\n" + "[6] LOC_PROTO '(anon)' vlen=2\n" + "\ttype_id=4 value='r1'\n" + "\ttype_id=5 value='*(r2 + 0x10)'\n" + "[7] LOCSEC 'inline.text' vlen=1\n" + "\tname='foo' func_type_id=3 loc_proto_type_id=6 offset=64\n"; + char *dump; + + dump = dump_raw(btf_path); + if (!dump) + return; + + ASSERT_OK(compare_text_to_expected(dump, expected), "cmp_loc_dump"); + free(dump); +} + void test_bpftool_btf_dump(void) { char path[PATH_MAX]; @@ -175,4 +249,14 @@ void test_bpftool_btf_dump(void) unlink(path); out_btf: btf__free(btf); + + btf = mk_loc_btf(); + if (!btf) + return; + + if (!btf_to_tmpfile(btf, path) && test__start_subtest("loc_dump")) + test_loc_dump(path); + + unlink(path); + btf__free(btf); } -- 2.43.5