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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2025-07-03 23:48:12 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2025-07-04 05:30:07 +0300 |
| commit | d7c431cafcb4917b0d87b5cd10637cd47b6c8d79 (patch) | |
| tree | e4ed1a81bc9e3ef1e595e72d7643e7839cc6f9ec /include/linux | |
| parent | f0c53fd4a742f957da7077a691a85ef9775907dc (diff) | |
| download | linux-d7c431cafcb4917b0d87b5cd10637cd47b6c8d79.tar.xz | |
bpf: Add dump_stack() analogue to print to BPF stderr
Introduce a kernel function which is the analogue of dump_stack()
printing some useful information and the stack trace. This is not
exposed to BPF programs yet, but can be made available in the future.
When we have a program counter for a BPF program in the stack trace,
also additionally output the filename and line number to make the trace
helpful. The rest of the trace can be passed into ./decode_stacktrace.sh
to obtain the line numbers for kernel symbols.
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20250703204818.925464-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bpf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index b267c378d884..34dd90ec7fad 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -3616,8 +3616,10 @@ __printf(2, 3) int bpf_stream_stage_printk(struct bpf_stream_stage *ss, const char *fmt, ...); int bpf_stream_stage_commit(struct bpf_stream_stage *ss, struct bpf_prog *prog, enum bpf_stream_id stream_id); +int bpf_stream_stage_dump_stack(struct bpf_stream_stage *ss); #define bpf_stream_printk(ss, ...) bpf_stream_stage_printk(&ss, __VA_ARGS__) +#define bpf_stream_dump_stack(ss) bpf_stream_stage_dump_stack(&ss) #define bpf_stream_stage(ss, prog, stream_id, expr) \ ({ \ |