linux-kernel - Re: [PATCH bpf-next v5 3/3] selftests/bpf: Add stacktrace map lookup_and_delete

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Message-ID: <3a4b33a0-955d-421f-ac93-fae7fc91a565@linux.dev>
Date: Thu, 25 Sep 2025 21:12:56 +0800
From: Tao Chen <chen.dylane@...ux.dev>
To: Daniel Borkmann <daniel@...earbox.net>, ast@...nel.org,
 john.fastabend@...il.com, andrii@...nel.org, martin.lau@...ux.dev,
 eddyz87@...il.com, song@...nel.org, yonghong.song@...ux.dev,
 kpsingh@...nel.org, sdf@...ichev.me, haoluo@...gle.com, jolsa@...nel.org
Cc: bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next v5 3/3] selftests/bpf: Add stacktrace map
 lookup_and_delete_elem test case

在 2025/9/25 20:09, Daniel Borkmann 写道:
> On 9/23/25 6:58 PM, Tao Chen wrote:
>> Add tests for stacktrace map lookup and delete:
>> 1. use bpf_map_lookup_and_delete_elem to lookup and delete the target
>>     stack_id,
>> 2. lookup the deleted stack_id again to double check.
>>
>> Signed-off-by: Tao Chen <chen.dylane@...ux.dev>
>> ---
>>   .../testing/selftests/bpf/prog_tests/stacktrace_map.c | 11 ++++++++++-
>>   tools/testing/selftests/bpf/progs/stacktrace_map.c    |  2 ++
>>   2 files changed, 12 insertions(+), 1 deletion(-)
> BPF CI fails with:
> 
> Notice: Success: 644/5645, Skipped: 82, Failed: 1
> Error: #402 stacktrace_map_raw_tp
>    Error: #402 stacktrace_map_raw_tp
>    libbpf: elf: failed to open ./test_stacktrace_map.bpf.o: -ENOENT
>    test_stacktrace_map_raw_tp:FAIL:prog_load raw tp err -2 errno 2
> Test Results:
>               bpftool: PASS
>            test_progs: FAIL (returned 1)
> Error: Process completed with exit code 1.
> 
> https://github.com/kernel-patches/bpf/actions/runs/17993777572

Hi Daniel,

It seems that stacktrace_map_raw_tp will use test_stacktrace_map.bpf.c,
which is renamed to stacktrace_map.c in my patch, i will fix it, thanks.

tools/testing/selftests/bpf/prog_tests/stacktrace_map_raw_tp.c:8: 
const char *file = "./test_stacktrace_map.bpf.o";

-- 
Best Regards
Tao Chen