Re: [PATCH v2 05/15] tools/rv: Move argument parsing from in_kernel to utils

[bot+bpf-ci]

> tools/rv: Move argument parsing from in_kernel to utils

TL;DR: Nit only: the shared parse_arguments() in utils.c still prints an
"ikm:" prefix in its debug message, which would mislabel -v output for BPF
monitors later in the series. Cosmetic, no behaviour change.

> diff --git a/tools/verification/rv/src/utils.c b/tools/verification/rv/src/utils.c
> index 5677b439dc2f..e19dd65ec789 100644
> --- a/tools/verification/rv/src/utils.c
> +++ b/tools/verification/rv/src/utils.c

[ ... ]

> @@ -45,3 +48,91 @@ void debug_msg(const char *fmt, ...)

[ ... ]

> +		}
> +	}
> +
> +	debug_msg("ikm: my pid is %d\n", config.my_pid);

Is the "ikm: " prefix still appropriate in this debug message now that
parse_arguments() lives in the shared utils.c?

At this commit only ikm_run_monitor() calls parse_arguments(), so the output
is correct.  Later in the series, 46210ac84ea4 ("tools/rv: Implement BPF
monitor loading and tracing") adds bpf_run_monitor(), which sets
config.is_bpf = true and then calls parse_arguments(monitor_name, argc,
argv).

With that, running "rv mon <bpf_monitor> -v" prints "ikm: my pid is N",
even though bpf_run_monitor() labels its own messages with "bpf:" (for
example "bpf: failed parsing arguments").  The message is still unchanged
at the series tip, 3b00bc9b2e54.

Would dropping the "ikm: " prefix from the shared helper work?  The selftest
in tests/rv_mon.t only matches "my pid is $pid", so it should keep passing.

This is cosmetic, it only mislabels the -v output and does not change
behaviour.


---
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