Re: [PATCH 2/4] linux-user: cleanup signal.c

[Laurent Vivier <laurent@vivier.eu>]

Le 03/02/2020 à 23:58, Taylor Simpson a écrit :
> 
> 
>> -----Original Message-----
>> From: Laurent Vivier <laurent@vivier.eu>
>> Sent: Saturday, February 1, 2020 6:28 AM
>> To: qemu-devel@nongnu.org
>> Cc: Josh Kunz <jkz@google.com>; milos.stojanovic@rt-rk.com; Matus Kysel
>> <mkysel@tachyum.com>; Aleksandar Markovic <aleksandar.markovic@rt-
>> rk.com>; Marlies Ruck <marlies.ruck@gmail.com>; Laurent Vivier
>> <laurent@vivier.eu>; Peter Maydell <peter.maydell@linaro.org>; Taylor
>> Simpson <tsimpson@quicinc.com>; Riku Voipio <riku.voipio@iki.fi>
>> Subject: [PATCH 2/4] linux-user: cleanup signal.c
>>
>> -------------------------------------------------------------------------
>> CAUTION: This email originated from outside of the organization.
>> -------------------------------------------------------------------------
>>
>> No functionnal changes. Prepare the field for future fixes.
> 
> 
> Spelling error

Sorry, french word. Will be changed by "functional"

> 
>>
>> Remove memset(.., 0, ...) that is useless on a static array
>>
>> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
>> ---
>>  linux-user/signal.c | 37 ++++++++++++++++++++++---------------
>>  1 file changed, 22 insertions(+), 15 deletions(-)
>>
>> diff --git a/linux-user/signal.c b/linux-user/signal.c index
>> 5ca6d62b15d3..f42a2e1a82a5 100644
>> --- a/linux-user/signal.c
>> +++ b/linux-user/signal.c
>> @@ -66,12 +66,6 @@ static uint8_t host_to_target_signal_table[_NSIG] = {
>>      [SIGPWR] = TARGET_SIGPWR,
>>      [SIGSYS] = TARGET_SIGSYS,
>>      /* next signals stay the same */
>> -    /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
>> -       host libpthread signals.  This assumes no one actually uses SIGRTMAX :-/
>> -       To fix this properly we need to do manual signal delivery multiplexed
>> -       over a single host signal.  */
>> -    [__SIGRTMIN] = __SIGRTMAX,
>> -    [__SIGRTMAX] = __SIGRTMIN,
>>  };
>>  static uint8_t target_to_host_signal_table[_NSIG];
>>
>> @@ -480,13 +474,18 @@ static int core_dump_signal(int sig)
>>      }
>>  }
>>
>> -void signal_init(void)
>> +static void signal_table_init(void)
>>  {
>> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
>> -    struct sigaction act;
>> -    struct sigaction oact;
>>      int i, j;
>> -    int host_sig;
>> +
>> +    /*
>> +     * Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
>> +     * host libpthread signals.  This assumes no one actually uses SIGRTMAX :-
>> /
>> +     * To fix this properly we need to do manual signal delivery multiplexed
>> +     * over a single host signal.
>> +     */
>> +    host_to_target_signal_table[__SIGRTMIN] = __SIGRTMAX;
>> +    host_to_target_signal_table[__SIGRTMAX] = __SIGRTMIN;
>>
>>      /* generate signal conversion tables */
>>      for(i = 1; i < _NSIG; i++) {
>> @@ -497,14 +496,22 @@ void signal_init(void)
>>          j = host_to_target_signal_table[i];
> 
> Since you are cleaning up this code, let's give this a more descriptive name - target_sig would be consistent with host_sig used elsewhere.

I agree.

Thanks,
Laurent