On Fri, 2008-05-16 at 16:59 -0300, Edjunior Barbosa Machado wrote:
> Hi,
>
> running signal_test_01 IPC stress testcase in x86 and x86_64 machines, we
> faced the messages below:
>
> # cd ltp-full-20080430/testcases/kernel/ipc/ipc_stress/
> # ./signal_test_01
> ./signal_test_01: IPC Signals TestSuite program
>
> Send SIGILL, SIGALRM, SIGIOT signals to process
> received signal: (SIGILL)
> received signal: (SIGALRM)
> received signal: (SIGIOT/SIGABRT)
>
> Block SIGILL, SIGALRM, SIGIOT signals, and resend signals + others
> received signal: (SIGFPE)
> received signal: (SIGTERM)
> received signal: (SIGINT)
>
> Block rest of signals
>
> Change signal mask & wait until signal interrupts process
> ERROR [line: 266] sigpause failed: Invalid argument
>
> : Invalid argument
>
>
> The problems seems to be related to this piece of code:
>
> /* Change the process signal mask:
> *
> * Now specifiy a new process signal mask to allow the SIGINT signal
> * to interrupt the process. Thus by using sigpause (), force the
> * process to suspend execution until delivery of an unblocked
> * signal (SIGINT in this case).
> *
> * Additionally, verify that the SIGINT signal was received.
> */
> valid_sig [SIGINT] = 1;
>
> printf ("\n\tChange signal mask & wait until signal interrupts
> process\n");
> mask = 0xFFFF ^ SIGINT;
> if (sigpause (mask) != -1 || errno != 4)
> sys_error ("sigpause failed", __LINE__);
>
> if (valid_sig [SIGINT])
> error ("failed to receive SIGINT signal!", __LINE__);
>
>
> `man sigpause` says there are 2 versions of this function: one considering a
> signal as parameter (afaik, the default model) and another using a mask. In
> this case, sigpause() uses this second version. I've already test it using
> SIGINT as parameter and it seemed OK. I've also tried to force to sigpause()
> to use a mask adding defines mentioned in manpage, without success.
>
> In addiction, the manpage also advices to don't use this function and use
> sigsuspend() instead. However, I'm not sure if substitute a focused system
> call (like sigpause() in this case) is reasonable for LTP testsuits.
>
> Would you please suggest what could be an acceptable solution for this issue?
Yes, that can be.
Mike,
What do you say ?
Regards--
Subrata
>
> Thanks in advance,
>
> --
> Edjunior
>
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