diff options
author | Andrii Nakryiko <andrii@kernel.org> | 2021-12-09 11:38:38 -0800 |
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committer | Andrii Nakryiko <andrii@kernel.org> | 2021-12-10 15:29:18 -0800 |
commit | 57e889269af3dd0609933e2550c4baee7a7eb84c (patch) | |
tree | 8293245bcd9f21d92d32fcbcd9aee831e0f782c2 /tools/testing/selftests/bpf/progs/test_log_buf.c | |
parent | dc94121b5ca17adaaabb7959c10d9c6ea504f7b1 (diff) |
selftests/bpf: Add test for libbpf's custom log_buf behavior
Add a selftest that validates that per-program and per-object log_buf
overrides work as expected. Also test same logic for low-level
bpf_prog_load() and bpf_btf_load() APIs.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-11-andrii@kernel.org
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_log_buf.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/test_log_buf.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_log_buf.c b/tools/testing/selftests/bpf/progs/test_log_buf.c new file mode 100644 index 000000000000..199f459bd5ae --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_log_buf.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ + +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> + +int a[4]; +const volatile int off = 4000; + +SEC("raw_tp/sys_enter") +int good_prog(const void *ctx) +{ + a[0] = (int)(long)ctx; + return a[1]; +} + +SEC("raw_tp/sys_enter") +int bad_prog(const void *ctx) +{ + /* out of bounds access */ + return a[off]; +} + +char _license[] SEC("license") = "GPL"; |