diff options
| author | Feng Zhou <zhoufeng.zf@bytedance.com> | 2023-04-20 11:27:35 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-04-19 21:29:39 -0700 |
| commit | 5ff54dedf35bfee7a16eb9f8fb7ecadf7d5564cb (patch) | |
| tree | 5b9bba487042875f0a750a9ee91152a52783ba32 /tools/testing/selftests/bpf/progs/test_access_variable_array.c | |
| parent | 2569c7b8726fc06d946a4f999fb1be15b68f3f3c (diff) | |
selftests/bpf: Add test to access integer type of variable array
Add prog test for accessing integer type of variable array in tracing
program.
In addition, hook load_balance function to access sd->span[0], only
to confirm whether the load is successful. Because there is no direct
way to trigger load_balance call.
Co-developed-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com>
Link: https://lore.kernel.org/r/20230420032735.27760-3-zhoufeng.zf@bytedance.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_access_variable_array.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_access_variable_array.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_access_variable_array.c b/tools/testing/selftests/bpf/progs/test_access_variable_array.c new file mode 100644 index 000000000000..808c49b79889 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_access_variable_array.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2023 Bytedance */ + +#include "vmlinux.h" +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +unsigned long span = 0; + +SEC("fentry/load_balance") +int BPF_PROG(fentry_fentry, int this_cpu, struct rq *this_rq, + struct sched_domain *sd) +{ + span = sd->span[0]; + + return 0; +} + +char _license[] SEC("license") = "GPL"; |