From: Jean-Philippe Brucker <jean-philippe@linaro.org>
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,
bpf@vger.kernel.org,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Andrii Nakryiko <andrii.nakryiko@gmail.com>
Subject: [PATCH bpf v2 2/2] selftests/bpf: Add selftest for pointer-to-array-of-struct BTF dump
Date: Fri, 19 Mar 2021 12:25:55 +0100 [thread overview]
Message-ID: <20210319112554.794552-3-jean-philippe@linaro.org> (raw)
In-Reply-To: <20210319112554.794552-1-jean-philippe@linaro.org>
Bpftool used to issue forward declarations for a struct used as part of
a pointer to array, which is invalid. Add a test to check that the
struct is fully defined in this case:
@@ -134,9 +134,9 @@
};
};
-struct struct_in_array {};
+struct struct_in_array;
-struct struct_in_array_typed {};
+struct struct_in_array_typed;
typedef struct struct_in_array_typed struct_in_array_t[2];
@@ -189,3 +189,7 @@
struct struct_with_embedded_stuff _14;
};
+struct struct_in_array {};
+
+struct struct_in_array_typed {};
+
...
#13/1 btf_dump: syntax:FAIL
Suggested-by: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
.../selftests/bpf/progs/btf_dump_test_case_syntax.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/tools/testing/selftests/bpf/progs/btf_dump_test_case_syntax.c b/tools/testing/selftests/bpf/progs/btf_dump_test_case_syntax.c
index 31975c96e2c9..3ac0c9afc35a 100644
--- a/tools/testing/selftests/bpf/progs/btf_dump_test_case_syntax.c
+++ b/tools/testing/selftests/bpf/progs/btf_dump_test_case_syntax.c
@@ -174,6 +174,12 @@ struct struct_in_struct {
};
};
+struct struct_in_array {};
+
+struct struct_in_array_typed {};
+
+typedef struct struct_in_array_typed struct_in_array_t[2];
+
struct struct_with_embedded_stuff {
int a;
struct {
@@ -203,6 +209,8 @@ struct struct_with_embedded_stuff {
} r[5];
struct struct_in_struct s[10];
int t[11];
+ struct struct_in_array (*u)[2];
+ struct_in_array_t *v;
};
struct root_struct {
--
2.30.2
prev parent reply other threads:[~2021-03-19 11:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-19 11:25 [PATCH bpf v2 0/2] libbpf: Fix BTF dump of pointer-to-array-of-struct Jean-Philippe Brucker
2021-03-19 11:25 ` [PATCH bpf v2 1/2] " Jean-Philippe Brucker
2021-03-19 11:25 ` Jean-Philippe Brucker [this message]
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