tmedicci commented on PR #8926:
URL: https://github.com/apache/nuttx/pull/8926#issuecomment-1490132654
Hi @masayuki2009 ,
Thanks for testing it on other architectures!
On Xtensa, specifically, the crash occurs only when the task is executing on
the other core. Possibly this is not the situation `ostest` tests because the
`waiter_main` will be waiting for a semaphore. Although it's important to
assure that `ostest` run properly.
I'd suggest you apply this patch on `nuttx-apps`:
```
diff --git a/examples/alarm/alarm_main.c b/examples/alarm/alarm_main.c
index 74c5e8fc60..fa8abf04cf 100644
--- a/examples/alarm/alarm_main.c
+++ b/examples/alarm/alarm_main.c
@@ -125,12 +125,6 @@ static int alarm_daemon(int argc, FAR char *argv[])
g_alarm_received[i] = false;
}
}
-
- /* Now wait a little while and poll again. If a signal is received
- * this should cause us to awken earlier.
- */
-
- usleep(500 * 1000L);
}
errout:
```
That will force a core to run the task in an infinite loop and the signal
handler would need to interrupt this task to deliver the singal. Build & run
the `EXAMPLES_ALARM` app:
```
nsh> alarm 2
alarm_daemon started
alarm_daemon: Running
Opening /dev/rtc0
Alarm 0 set in 2 seconds
nsh> alarm_daemon: alarm 0 received
```
This is the result on xtensa/esp32 after applying the patch on this MR.
Prior to this, it was crashing while executing `up_irq_restore(flags)` on
[`leave_critical_section`](https://github.com/apache/nuttx/blob/632d87ee71a6e7a6dd1ac768690cf481313befc4/sched/irq/irq_csection.c#L588)
That makes sense for Xtensa: the original context (included would need to be
restored only after all signal handling.
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