linux-kernel - Re: [PATCH 2/2] Makefile: clang-tools: Omit printing stack trace when KeyboardInterrupt is raised

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Date:   Fri, 21 May 2021 10:17:52 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Maciej Falkowski <maciej.falkowski9@...il.com>
Cc:     Nathan Chancellor <natechancellor@...il.com>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: Re: [PATCH 2/2] Makefile: clang-tools: Omit printing stack trace when
 KeyboardInterrupt is raised

On Thu, May 20, 2021 at 4:18 PM Maciej Falkowski
<maciej.falkowski9@...il.com> wrote:
>
> When user terminates the script (also implicitly through for example
> `make clang-analyzer`) by using
> Ctrl+C (or sending SIGINT more generally) the KeyboardInterrupt
> is raised printing stack trace of the execution as shown below:
>
> $ ./scripts/clang-tools/run-clang-tools.py clang-tidy ./compile_commands.json
> ^CTraceback (most recent call last):
>   File "./scripts/clang-tools/run-clang-tools.py", line 74, in <module>
>     main()
>   File "./scripts/clang-tools/run-clang-tools.py", line 70, in main
>     pool.map(run_analysis, datastore)
>   File "/usr/lib64/python3.8/multiprocessing/pool.py", line 364, in map
>     return self._map_async(func, iterable, mapstar, chunksize).get()
>   File "/usr/lib64/python3.8/multiprocessing/pool.py", line 765, in get
>     self.wait(timeout)
>   File "/usr/lib64/python3.8/multiprocessing/pool.py", line 762, in wait
>     self._event.wait(timeout)
>   File "/usr/lib64/python3.8/threading.py", line 558, in wait
> Process ForkPoolWorker-6:
> Process ForkPoolWorker-1:
> Process ForkPoolWorker-5:
> Process ForkPoolWorker-7:
> Process ForkPoolWorker-2:
> Process ForkPoolWorker-3:
> Process ForkPoolWorker-4:
> Process ForkPoolWorker-8:
>     signaled = self._cond.wait(timeout)
>   File "/usr/lib64/python3.8/threading.py", line 302, in wait
>     waiter.acquire()
> KeyboardInterrupt

With this applied,
$ make LLVM=1 LLVM_IAS=1 -j72 clang-analyzer
^C
Process ForkPoolWorker-5:
make: *** [Makefile:1902: clang-analyzer] Error 130

Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
Tested-by: Nick Desaulniers <ndesaulniers@...gle.com>

Thanks for the patch!

> The patch handles the raise of the KeyboardInterrupt and exits when occurred
> with code 130 as documented in: https://tldp.org/LDP/abs/html/exitcodes.html
>
> Signed-off-by: Maciej Falkowski <maciej.falkowski9@...il.com>
> ---
>  scripts/clang-tools/run-clang-tools.py | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/scripts/clang-tools/run-clang-tools.py b/scripts/clang-tools/run-clang-tools.py
> index 38fc311d2e03..eb0e0ecfce24 100755
> --- a/scripts/clang-tools/run-clang-tools.py
> +++ b/scripts/clang-tools/run-clang-tools.py
> @@ -77,4 +77,7 @@ def main():
>
>
>  if __name__ == "__main__":
> -    main()
> +    try:
> +        main()
> +    except KeyboardInterrupt:
> +        sys.exit(130)
> --
> 2.26.3
>


-- 
Thanks,
~Nick Desaulniers