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selftests/bpf: add CO-RE relocs struct flavors tests

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Add tests verifying that BPF program can use various struct/union
"flavors" to extract data from the same target struct/union.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko
2019-08-07 14:39:54 -07:00
committed by Alexei Starovoitov
parent df36e62141
commit 002d3afce6
5 changed files with 117 additions and 0 deletions
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34
tools/testing/selftests/bpf/prog_tests/core_reloc.c
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@@ -1,5 +1,32 @@
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "progs/core_reloc_types.h"
#define STRUCT_TO_CHAR_PTR(struct_name) (const char *)&(struct struct_name)
#define FLAVORS_DATA(struct_name) STRUCT_TO_CHAR_PTR(struct_name) { \
.a = 42, \
.b = 0xc001, \
.c = 0xbeef, \
}
#define FLAVORS_CASE_COMMON(name) \
.case_name = #name, \
.bpf_obj_file = "test_core_reloc_flavors.o", \
.btf_src_file = "btf__core_reloc_" #name ".o" \
#define FLAVORS_CASE(name) { \
FLAVORS_CASE_COMMON(name), \
.input = FLAVORS_DATA(core_reloc_##name), \
.input_len = sizeof(struct core_reloc_##name), \
.output = FLAVORS_DATA(core_reloc_flavors), \
.output_len = sizeof(struct core_reloc_flavors), \
}
#define FLAVORS_ERR_CASE(name) { \
FLAVORS_CASE_COMMON(name), \
.fails = true, \
}
struct core_reloc_test_case {
const char *case_name;
@@ -23,6 +50,13 @@ static struct core_reloc_test_case test_cases[] = {
.output = "\1", /* true */
.output_len = 1,
},
/* validate BPF program can use multiple flavors to match against
* single target BTF type
*/
FLAVORS_CASE(flavors),
FLAVORS_ERR_CASE(flavors__err_wrong_name),
};
struct data {