[fpc-pascal] Stopping daemon in linux
Michael Van Canneyt
michael at freepascal.org
Mon Nov 9 21:51:09 CET 2009
On Mon, 9 Nov 2009, Jonas Maebe wrote:
> On 09 Nov 2009, at 21:03, Michael Van Canneyt wrote:
>> On Mon, 9 Nov 2009, "Vinzent Höfler" wrote:
>>> As wrong as in "Don't call most system functions from within a signal
>>> handler.", maybe?
>> Hmm... In that case, many exceptions would not work either ?
> The sigaction handlers for catching exceptions have been fixed quite a while
> ago already to only collect the necessary information from the signal
> context, and to then return from the signal handler to the start of the RTL
> function that handles run time errors, passing this info as arguments (we can
> pass at least 3 items on every platform by modifying the parameter register
> contents in the signal context; we also change the instruction pointer in the
> context so that it returns to the RTL's runerror handler rather than to
> wherever the signal was triggered).
Quite complex code, and not processor independent.
Is there not a more generic way of handling this ?
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