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Re: [PATCH v2 18/39] tests/qtest: libqtest: Install signal handler via s


From: Thomas Huth
Subject: Re: [PATCH v2 18/39] tests/qtest: libqtest: Install signal handler via signal()
Date: Fri, 23 Sep 2022 19:54:06 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.13.0

On 22/09/2022 21.55, Marc-André Lureau wrote:
Hi

On Tue, Sep 20, 2022 at 2:32 PM Bin Meng <bmeng.cn@gmail.com <mailto:bmeng.cn@gmail.com>> wrote:

    From: Bin Meng <bin.meng@windriver.com <mailto:bin.meng@windriver.com>>

    At present the codes uses sigaction() to install signal handler with
    a flag SA_RESETHAND. Such usage can be covered by the signal() API
    that is a simplified interface to the general sigaction() facility.

    Update to use signal() to install the signal handler, as it is
    available on Windows which we are going to support.

    Signed-off-by: Bin Meng <bin.meng@windriver.com
    <mailto:bin.meng@windriver.com>>
    ---

    (no changes since v1)

      tests/qtest/libqtest.c | 14 +++-----------
      1 file changed, 3 insertions(+), 11 deletions(-)

    diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c
    index 8b804faade..f46a21fa45 100644
    --- a/tests/qtest/libqtest.c
    +++ b/tests/qtest/libqtest.c
    @@ -66,7 +66,7 @@ struct QTestState
      };

      static GHookList abrt_hooks;
    -static struct sigaction sigact_old;
    +static sighandler_t sighandler_old;

      static int qtest_query_target_endianness(QTestState *s);

    @@ -179,20 +179,12 @@ static void sigabrt_handler(int signo)

      static void setup_sigabrt_handler(void)
      {
    -    struct sigaction sigact;
    -
    -    /* Catch SIGABRT to clean up on g_assert() failure */
    -    sigact = (struct sigaction){
    -        .sa_handler = sigabrt_handler,
    -        .sa_flags = SA_RESETHAND,
    -    };
    -    sigemptyset(&sigact.sa_mask);
    -    sigaction(SIGABRT, &sigact, &sigact_old);
    +    sighandler_old = signal(SIGABRT, sigabrt_handler);
      }

      static void cleanup_sigabrt_handler(void)
      {
    -    sigaction(SIGABRT, &sigact_old, NULL);
    +    signal(SIGABRT, sighandler_old);


I would rather make the usage of signal() specific to WIN32, but it's up to the maintainers to decide what's best.

Thomas, Laurent, opinions?

I don't mind much either way ... I'd say let's take this patch since it's already done and it avoids some #ifdefs in the code.

 Thomas





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