Re: [LTP] [PATCH] syscalls: fix some failure on arch X86_64

liubo
2009-11-27T10:07:21Z

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Hi, Garrett

On 11/27/2009 04:50 PM, Garrett Cooper wrote:
> On Thu, Nov 26, 2009 at 10:49 PM, Garrett Cooper <yanegomi@gmail.com> wrote:
>
>> On Thu, Nov 26, 2009 at 9:33 PM, liubo <liubo2009@cn.fujitsu.com> wrote:
>>
>>> Hi, Garrett
>>> On 11/26/2009 07:11 PM, Garrett Cooper wrote:
>>>
>>> On Mon, Nov 16, 2009 at 12:53 AM, liubo <liubo2009@cn.fujitsu.com> wrote:
>>>
>>>
>>> Hi, Subrata,
>>> On 11/16/2009 04:13 PM, Subrata Modak wrote:
>>>
>>> Liubo,
>>>
>>> Are you sending an updated patch post this discussion ?
>>>
>>>
>>>
>>> Yes, I'll resend a updated patch about these rt_sigs.
>>>
>>> Regards--
>>> Liubo
>>>
>>> Regards--
>>> Subrata
>>>
>>> On Wed, 2009-11-11 at 13:03 +0800, Wei Yongjun wrote:
>>>
>>>
>>> Mike Frysinger wrote:
>>>
>>>
>>> On Tuesday 10 November 2009 04:38:30 liubo wrote:
>>>
>>>
>>>
>>> 1) rt_sigaction
>>> "sigaction" has the structure:
>>>
>>> struct sigaction {
>>> __sighandler_t sa_handler;
>>> unsigned long sa_flags;
>>> #ifdef SA_RESTORER
>>> __sigrestore_t sa_restorer;
>>> #endif
>>> sigset_t sa_mask; /* mask last for extensibility */
>>> };
>>>
>>> However, on arch x86_64, if we directly get to call rt_sigaction,
>>> the argument "sa_restorer" will not be fulfilled, and this will lead
>>> to segment fault.
>>> on arch x86_64, if sa_restorer is not set, kernel will lead to segment
>>> fault. In other arch, if sa_restorer is not set, kernel can do the correct
>>> work. To avoid this segment fault, we use glibc function
>>> "int sigaction(...);" instead, which can fulfill the argument
>>> "sa_restorer".
>>>
>>>
>>>
>>> which defeats the purpose of the test. there is no guarantee that the C
>>> library sigaction function is implemented via the __NR_rt_sigaction syscall.
>>>
>>>
>>>
>>> In x86_64, it do this. And If we want to use __NR_rt_sigaction syscall
>>> directly, we must fill the sa_restorer and set the RESTORER flag to
>>> sa_mask. If we do not set the sa_restorer, kill will always cause
>>> segment fault.
>>>
>>>
>>>
>>>
>>>
>>>
>>> 2) rt_sigprocmask
>>> This failure contains two aspects,
>>> the first is the segment fault as described in 1),
>>> the second is that testcase uses a unknown signal 33 for test,
>>> and this will lead sigaction cannot bind signal 33 to the action.
>>>
>>> So, we attempt to use a known signal instead, such as 34.
>>>
>>>
>>>
>>> which is just as bogus and unportable. if the test needs a real time
>>> signal,
>>> it should leverage the sigrtmin...sigrtmax defines.
>>> -mike
>>>
>>>
>>> I see what you mean about this testcase segfaulting now.
>>>
>>> I've done some exploring, and while sigaction does map to rt_sigaction
>>> on ia64 and x86_64, it won't on arm, mips, s390*, sh, or x86.
>>>
>>> Furthermore, the problem is actually being caused by the fact that
>>> we're not even calling sigaddset properly!
>>>
>>> gcooper@orangebox
>>> /scratch/ltp-dev2/ltp/testcases/kernel/syscalls/rt_sigaction $ gdb
>>> ./rt_sigaction01
>>> GNU gdb 6.8
>>> Copyright (C) 2008 Free Software Foundation, Inc.
>>> License GPLv3+: GNU GPL version 3 or later
>>> <http://gnu.org/licenses/gpl.html>
>>> This is free software: you are free to change and redistribute it.
>>> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
>>> and "show warranty" for details.
>>> This GDB was configured as "x86_64-pc-linux-gnu"...
>>> (gdb) c
>>> The program is not being run.
>>> (gdb) r
>>> Starting program:
>>> /scratch/ltp-dev2/ltp/testcases/kernel/syscalls/rt_sigaction/rt_sigaction01
>>> thread:20
>>> [Thread debugging using libthread_db enabled]
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 1 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 2 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 3 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 4 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 5 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 6 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 7 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 8 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 9 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 10 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 11 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 12 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 13 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 14 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 15 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 16 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 17 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 18 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 19 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 20 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 21 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 22 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 23 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 24 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 25 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 26 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 27 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 28 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 29 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>> rt_sigaction01 0 TINFO : sigaddset(..) failed
>>> rt_sigaction01 30 TFAIL : rt_sigaction01 failed:
>>> TEST_ERRNO=EINVAL(22): Invalid argument
>>>
>>> So, the test needs fixing, anyhow. After I fixed it, the test still
>>> segfaulted >:( --
>>>
>>> gcooper@orangebox
>>> /scratch/ltp-dev2/ltp/testcases/kernel/syscalls/rt_sigaction $ gdb
>>> ./rt_sigaction01
>>> GNU gdb 6.8
>>> Copyright (C) 2008 Free Software Foundation, Inc.
>>> License GPLv3+: GNU GPL version 3 or later
>>> <http://gnu.org/licenses/gpl.html>
>>> This is free software: you are free to change and redistribute it.
>>> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
>>> and "show warranty" for details.
>>> This GDB was configured as "x86_64-pc-linux-gnu"...
>>> (gdb) r
>>> Starting program:
>>> /scratch/ltp-dev2/ltp/testcases/kernel/syscalls/rt_sigaction/rt_sigaction01
>>> thread:20
>>> [Thread debugging using libthread_db enabled]
>>> rt_sigaction01 0 TINFO : signal: 34
>>> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
>>> [New Thread 0x7fdd451d66f0 (LWP 31927)]
>>>
>>> Program received signal SIG34, Real-time event 34.
>>> [Switching to Thread 0x7fdd451d66f0 (LWP 31927)]
>>> 0x00007fdd448944f7 in kill () from /lib/libc.so.6
>>> (gdb) c
>>> Continuing.
>>>
>>> Program received signal SIGSEGV, Segmentation fault.
>>> 0x00007fdd448944f7 in kill () from /lib/libc.so.6
>>>
>>> So I tried to do some digging. glibc 2.8-20080602 does the following
>>> for alpha, i386, and sysv:
>>>
>>> result = INLINE_SYSCALL (rt_sigaction, 4,
>>> sig, act ? __ptrvalue (&kact) : NULL,
>>> oact ? __ptrvalue (&koact) : NULL, _NSIG /
>>> 8);
>>>
>>> The kernel code for rt_sigaction in kernel/signal.c is as follows:
>>>
>>> #ifdef __ARCH_WANT_SYS_RT_SIGACTION
>>> SYSCALL_DEFINE4(rt_sigaction, int, sig,
>>> const struct sigaction __user *, act,
>>> struct sigaction __user *, oact,
>>> size_t, sigsetsize)
>>> {
>>> struct k_sigaction new_sa, old_sa;
>>> int ret = -EINVAL;
>>>
>>> /* XXX: Don't preclude handling different sized sigset_t's. */
>>> if (sigsetsize != sizeof(sigset_t))
>>> goto out;
>>>
>>> if (act) {
>>> if (copy_from_user(&new_sa.sa, act, sizeof(new_sa.sa)))
>>> return -EFAULT;
>>> }
>>>
>>> ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa :
>>> NULL);
>>>
>>> if (!ret && oact) {
>>> if (copy_to_user(oact, &old_sa.sa, sizeof(old_sa.sa)))
>>> return -EFAULT;
>>> }
>>> out:
>>> return ret;
>>> }
>>>
>>> This just blows my mind because rt_sigaction is just calling
>>> do_sigaction, which is the same code as sigaction AFAICT, apart from
>>> the fact that rt_sigaction completely disregards sa_restorer on some
>>> architectures because it's obsolete, and requires the end-user to
>>> specify a signal mask set (here's mips' version, which wasn't the same
>>> as i386's version -- i386 had the old sa_restorer code):
>>>
>>> SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
>>> struct sigaction __user *, oact)
>>> {
>>> struct k_sigaction new_ka, old_ka;
>>> int ret;
>>> int err = 0;
>>>
>>> if (act) {
>>> old_sigset_t mask;
>>>
>>> if (!access_ok(VERIFY_READ, act, sizeof(*act)))
>>> return -EFAULT;
>>> err |= __get_user(new_ka.sa.sa_handler, &act->sa_handler);
>>> err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
>>> err |= __get_user(mask, &act->sa_mask.sig[0]);
>>> if (err)
>>> return -EFAULT;
>>>
>>> siginitset(&new_ka.sa.sa_mask, mask);
>>> }
>>>
>>> ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka :
>>> NULL);
>>>
>>> if (!ret && oact) {
>>> if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
>>> return -EFAULT;
>>> err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
>>> err |= __put_user(old_ka.sa.sa_handler, &oact->sa_handler);
>>> err |= __put_user(old_ka.sa.sa_mask.sig[0],
>>> oact->sa_mask.sig);
>>> err |= __put_user(0, &oact->sa_mask.sig[1]);
>>> err |= __put_user(0, &oact->sa_mask.sig[2]);
>>> err |= __put_user(0, &oact->sa_mask.sig[3]);
>>> if (err)
>>> return -EFAULT;
>>> }
>>>
>>> return ret;
>>> }
>>>
>>> I dunno -- maybe someone else can read the kernel code better than me,
>>> but it looks like there's zero real value to the rt_sigaction
>>> testcases, because it can be covered by sigaction...
>>>
>>>
>>>
>>> We just tell guys who use these testcases on arch x86_64 that
>>> "Syscall rt_sigaction cannot be called directly on arch x86_64.",
>>> can we?
>>>
>> It's not just x86_64 -- it's also ia64, and this may change
>> depending on the version of glibc and linux sources, so... this really
>> isn't a viable solution IMO.
>> Does anyone have any better suggestions, apart from just using a
>> preprocessor macro that would execute rt_sig* via their non-rt
>> equivalents in ltp_signal.h?
>>
>
> AHA! I think I discovered the kernel bug. rt_sigaction on x86_64
> assumes that you're working in 32-bit space:
>
> gcooper@orangebox /usr/src/linux $ grep -r rt_sigaction /usr/src/linux/arch/x86*
> /usr/src/linux/arch/x86/ia32/sys_ia32.c:asmlinkage long
> sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
> Binary file /usr/src/linux/arch/x86/ia32/sys_ia32.o matches
> Binary file /usr/src/linux/arch/x86/ia32/built-in.o matches
> /usr/src/linux/arch/x86/ia32/ia32entry.S: .quad sys32_rt_sigaction
> Binary file /usr/src/linux/arch/x86/ia32/ia32entry.o matches
> Binary file /usr/src/linux/arch/x86/kernel/syscall_64.o matches
> Binary file /usr/src/linux/arch/x86/kernel/built-in.o matches
> /usr/src/linux/arch/x86/kernel/syscall_table_32.S: .long sys_rt_sigaction
> /usr/src/linux/arch/x86/include/asm/unistd_32.h:#define
> __NR_rt_sigaction 174
> /usr/src/linux/arch/x86/include/asm/unistd_64.h:#define
> __NR_rt_sigaction 13
> /usr/src/linux/arch/x86/include/asm/unistd_64.h:__SYSCALL(__NR_rt_sigaction,
> sys_rt_sigaction)
> /usr/src/linux/arch/x86/include/asm/sys_ia32.h:asmlinkage long
> sys32_rt_sigaction(int, struct sigaction32 __user *,
>
> Watch (compiled with -m32):
>
> rt_sigaction01 0 TINFO : signal: 34
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 34
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 34
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 34
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 34
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 34
> rt_sigaction01 0 TINFO : signal: 35
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 35
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 35
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 35
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 35
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 35
> rt_sigaction01 0 TINFO : signal: 36
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 36
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 36
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 36
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 36
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 36
> rt_sigaction01 0 TINFO : signal: 37
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 37
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 37
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 37
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 37
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 37
> rt_sigaction01 0 TINFO : signal: 38
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 38
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 38
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 38
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 38
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 38
> rt_sigaction01 0 TINFO : signal: 39
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 39
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 39
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 39
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 39
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 39
> rt_sigaction01 0 TINFO : signal: 40
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 40
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 40
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 40
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 40
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 40
> rt_sigaction01 0 TINFO : signal: 41
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 41
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 41
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 41
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 41
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 41
> rt_sigaction01 0 TINFO : signal: 42
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 42
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 42
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 42
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 42
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 42
> rt_sigaction01 0 TINFO : signal: 43
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 43
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 43
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 43
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 43
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 43
> rt_sigaction01 0 TINFO : signal: 44
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 44
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 44
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 44
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 44
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 44
> rt_sigaction01 0 TINFO : signal: 45
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 45
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 45
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 45
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 45
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 45
> rt_sigaction01 0 TINFO : signal: 46
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 46
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 46
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 46
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 46
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 46
> rt_sigaction01 0 TINFO : signal: 47
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 47
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 47
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 47
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 47
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 47
> rt_sigaction01 0 TINFO : signal: 48
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 48
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 48
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 48
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 48
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 48
> rt_sigaction01 0 TINFO : signal: 49
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 49
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 49
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 49
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 49
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 49
> rt_sigaction01 0 TINFO : signal: 50
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 50
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 50
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 50
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 50
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 50
> rt_sigaction01 0 TINFO : signal: 51
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 51
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 51
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 51
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 51
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 51
> rt_sigaction01 0 TINFO : signal: 52
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 52
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 52
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 52
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 52
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 52
> rt_sigaction01 0 TINFO : signal: 53
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 53
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 53
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 53
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 53
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 53
> rt_sigaction01 0 TINFO : signal: 54
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 54
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 54
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 54
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 54
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 54
> rt_sigaction01 0 TINFO : signal: 55
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 55
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 55
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 55
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 55
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 55
> rt_sigaction01 0 TINFO : signal: 56
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 56
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 56
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 56
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 56
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 56
> rt_sigaction01 0 TINFO : signal: 57
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 57
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 57
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 57
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 57
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 57
> rt_sigaction01 0 TINFO : signal: 58
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 58
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 58
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 58
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 58
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 58
> rt_sigaction01 0 TINFO : signal: 59
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 59
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 59
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 59
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 59
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 59
> rt_sigaction01 0 TINFO : signal: 60
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 60
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 60
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 60
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 60
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 60
> rt_sigaction01 0 TINFO : signal: 61
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 61
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 61
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 61
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 61
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 61
> rt_sigaction01 0 TINFO : signal: 62
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 62
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 62
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 62
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 62
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 62
> rt_sigaction01 0 TINFO : signal: 63
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 63
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 63
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 63
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 63
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 63
> rt_sigaction01 0 TINFO : signal: 64
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 64
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 64
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 64
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_RESETHAND|SA_SIGINFO
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 64
> rt_sigaction01 0 TINFO : sa.sa_flags = SA_NOMASK
> rt_sigaction01 0 TINFO : Signal Handler Called with signal number 64
>
> So from what I can tell, the sucker isn't properly translating
> something in 64-bit space, and instead of properly trapping the issue,
> it's segfaulting and dying -_-.
>
> Ultimately the problem from what I can see is that bi-arch (32-bit on
> 64-bit kernel) 64-bit rt_sig* support is broken. I don't know about
> straight, non-bi-arch 64-bit rt_sig* support...
>
> If someone could verify this with a little more kernel experience, or
> someone could direct me on how the issue could be trapped in gdb so I
> could inspect the registers and ensure the traps are or aren't being
> done properly, that would be helpful.
>
>

Although I had figured this, I think your solution is just a compromise,
isn't it?
Change 64-bit rt_sigaction to 32-bit rt_sigaction to pass the testcase.
Let's try to use 64bit rt_sigaction to pass it. ^_^

Thanks~
Liubo

> Thanks!
> -Garrett
>
>
>

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