[Xenomai-core] [BUG] deleting a T_SUSP'ed native task

[Jan Kiszka <jan.kiszka@domain.hid>]

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Hi Gilles,

were you able to successfully run my T_SUSP test-case after the latest
changes? For me this code still causes fatal exceptions:

#include <stdio.h>
#include <sys/mman.h>
#include <native/task.h>

void func(void *arg)
{
    printf("you should not see this\n");
    rt_task_suspend(NULL);
}

int main(int argc, char **argv)
{
    RT_TASK task;

    mlockall(MCL_CURRENT|MCL_FUTURE);
    rt_task_create(&task, "T_SUSP-test", 0, 10, T_SUSP);
    rt_task_start(&task, func, NULL);
    printf("deleting...\n");
    rt_task_delete(&task);
    return 0;
}


This is the output of the locked up system:

[  115.263641] Xenomai: fatal: xnshadow_relax() failed for thread
T_SUSP-test[871]
[  115.263650]  CPU  PID    PRI  TIMEOUT  STAT      NAME
[  115.263656]    0  0      10   0        00500088  ROOT
[  115.263661] >  0  871    10   0        00301880  T_SUSP-test
[  115.263666] Timer: oneshot [tickval=1 ns, elapsed=115298322556]
[  115.263671]
[  115.300112] ce853f24 d085fa78 c1300000 d08606f8 d0a21d70 00000367
ce853fbc c0301780
[  115.309231]        58454e4f ce853f74 d0859cfe 00000001 00000018
b7db4000 ce853f80 d0a21a60
[  115.319295]        cf09a570 c04f2d80 c0301780 c04f2d80 ce853fa8
c013b695 00000021 c04f2d80
[  115.329359] Call Trace:
[  115.332497]  [<c0103784>] show_stack+0x94/0xe0
[  115.337847]  [<d085903a>] xnshadow_relax+0x19a/0x230 [xeno_nucleus]
[  115.345418]  [<d0859cfe>] hisyscall_event+0xde/0x3a0 [xeno_nucleus]
[  115.352961]  [<c013b695>] __ipipe_dispatch_event+0x95/0x130
[  115.359657]  [<c010e571>] __ipipe_syscall_root+0x31/0xf0
[  115.366038]  [<c0103070>] system_call+0x20/0x41

And then this:

[  115.550244] Xenomai: watchdog triggered -- suspending runaway thread
'T_SUSP-test'
[  115.554242] Xenomai: watchdog triggered -- suspending runaway thread
'T_SUSP-test'
[  115.558241] Xenomai: watchdog triggered -- suspending runaway thread
'T_SUSP-test'
...

Jan


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