lkml.org 
[lkml]   [2022]   [Oct]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v1 0/8] Update to C11, fix signal undefined behavior
Em Mon, Oct 24, 2022 at 10:35:15AM -0700, Ian Rogers escreveu:
> The use of C11 is mainstream in the kernel [1]. There was some
> confusion on volatile and signal handlers in [2]. Switch to using
> stdatomic.h (requires C11) and sig_atomic_t as per [3]. Thanks to Leo
> Yan <leo.yan@linaro.org> for the suggestions.
>
> [1] https://lore.kernel.org/lkml/CAHk-=whWbENRz-vLY6vpESDLj6kGUTKO3khGtVfipHqwewh2HQ@mail.gmail.com/
> [2] https://lore.kernel.org/lkml/20221024011024.462518-1-irogers@google.com/
> [3] https://wiki.sei.cmu.edu/confluence/display/c/SIG31-C.+Do+not+access+shared+objects+in+signal+handlers

I think I'll apply this to perf/core, i.e. for 6.3, ok?

- Arnaldo

>
> Ian Rogers (8):
> perf build: Update to C standard to gnu11
> perf record: Use sig_atomic_t for signal handlers
> perf daemon: Use sig_atomic_t to avoid UB
> perf ftrace: Use sig_atomic_t to avoid UB
> perf session: Change type to avoid UB
> perf stat: Use sig_atomic_t to avoid UB
> perf top: Use sig_atomic_t to avoid UB
> perf trace: Use sig_atomic_t to avoid UB
>
> tools/perf/Makefile.config | 2 +-
> tools/perf/builtin-daemon.c | 3 ++-
> tools/perf/builtin-ftrace.c | 4 ++--
> tools/perf/builtin-record.c | 9 +++++----
> tools/perf/builtin-stat.c | 9 +++++----
> tools/perf/builtin-top.c | 4 ++--
> tools/perf/builtin-trace.c | 4 ++--
> tools/perf/util/session.c | 3 ++-
> 8 files changed, 21 insertions(+), 17 deletions(-)
>
> --
> 2.38.0.135.g90850a2211-goog

--

- Arnaldo

\
 
 \ /
  Last update: 2022-10-24 21:27    [W:0.078 / U:1.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site