Re: [9fans] syscall silently kill processes

[adr <adr@SDF.ORG>]

On Fri, 17 Jun 2022, andrey100100100@gmail.com wrote:
> Seems like noted() call not needed in user code.

noted() is only needed when using the syscall notify, when using
atnotify() (or threadnotify) you don't need it, as it is said in
notify(2) and you did correctly in your first example. threadnotify
doesn't kill your process if there is no space free in onnote[],
onnotepid[], the handler is not registered, that's all. alarm()
should send the note to the process and the first handler registered
with the note "alarm" should be executed. Your handler checked for
the note and returned non zero, the process should continue. When
read is interrupted, it should return an error, the process should
not be killed. Here is the issue. Comment the read statement and
there will be the same number of "end"s as "start"s.

Note that you could register the handler in threadmain and avoid
completely this issue, but as I said before, something seems wrong
to me here.

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