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selftests/bpf: Add LOC_PARAM, LOC_PROTO, LOCSEC to field iter tests

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BTF_KIND_LOC[_PARAM|_PROTO|SEC] need to work with field iteration, so
extend the selftest to cover these and ensure iteration over all types
and names succeeds.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260924111428.75957-5-alan.maguire@oracle.com
This commit is contained in:
Alan Maguire 2026-09-24 12:14:21 +01:00 committed by Alexei Starovoitov
parent 0f1de9408e
commit 663fa77138
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1 changed files with 28 additions and 3 deletions
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31
tools/testing/selftests/bpf/prog_tests/btf_field_iter.c
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@ -31,8 +31,11 @@ struct field_data {
{ .ids = { 11 }, .strs = { "decltag" } },
{ .ids = { 6 }, .strs = { "typetag" } },
{ .ids = {}, .strs = { "e64", "eval1", "eval2", "eval3" } },
{ .ids = { 15, 16 }, .strs = { "datasec1" } }
{ .ids = { 15, 16 }, .strs = { "datasec1" } },
{ .ids = {}, .strs = { "" } },
{ .ids = {}, .strs = { "" } },
{ .ids = { 22, 23 }, .strs = { "" } },
{ .ids = { 14, 24 }, .strs = { ".loc" } }
};
/* Fabricate BTF with various types and check BTF field iteration finds types,
@ -88,6 +91,19 @@ void test_btf_field_iter(void)
btf__add_datasec_var_info(btf, 15, 0, 4);
btf__add_datasec_var_info(btf, 16, 4, 8);
btf__add_loc_param(btf, 4, BTF_LOC_PARAM_CONST | BTF_LOC_PARAM_SIGNED);
/* [22] loc value -1 */
btf__add_loc_param_value(btf, -1);
btf__add_loc_param(btf, 8, BTF_LOC_PARAM_REG); /* [23] loc reg 1 */
btf__add_loc_param_value(btf, 1);
btf__add_loc_proto(btf); /* [24] loc proto */
btf__add_loc_proto_param(btf, 22); /* param value -1, */
btf__add_loc_proto_param(btf, 23); /* param reg 1 */
btf__add_locsec(btf, ".loc"); /* [25] locsec ".loc" */
btf__add_locsec_loc(btf, 14, 24, 128); /* "func" */
VALIDATE_RAW_BTF(
btf,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
@ -123,7 +139,16 @@ void test_btf_field_iter(void)
"\t'eval3' val=3000",
"[21] DATASEC 'datasec1' size=12 vlen=2\n"
"\ttype_id=15 offset=0 size=4\n"
"\ttype_id=16 offset=4 size=8");
"\ttype_id=16 offset=4 size=8",
"[22] LOC_PARAM '(anon)' size=4 flags=0x3 vlen=1\n"
"\tvalue=-1",
"[23] LOC_PARAM '(anon)' size=8 flags=0x8 vlen=1\n"
"\tvalue=1",
"[24] LOC_PROTO '(anon)' vlen=2\n"
"\ttype_id=22\n"
"\ttype_id=23",
"[25] LOCSEC '.loc' vlen=1\n"
"\tfunc_type_id=14 loc_proto_type_id=24 offset=128");
for (id = 1; id < btf__type_cnt(btf); id++) {
struct btf_type *t = btf_type_by_id(btf, id);