[fpc-pascal] Powtils Apache and Windows Seven 64bits

[Michael Van Canneyt]

On Tue, 25 May 2010, Bee Jay wrote:

> On 25 Mei 2010, at 17:36, Michael Van Canneyt wrote:
>
>> Here I can reliably reproduce the memory corruption. It crashes the output
>> regularly. (with random use, it happens 10-15 times a day, in a test enviromnent).
>
> Would you share the test code?

Unfortunately I can't; it's an internal app :/

(and would take very long to set up since it needs a complicated database)

>
>> The bug is in the garbage collector, which attempts to free objects that have already been freed, but were not removed from the garbage collector list.
>
> Again, which part of the code?

I checked, but I can't show that any more; the garbage collector was reworked
completely it seems. I have not tried with the latest version, and since I switched 
to fcl-web anyway, there is no point any more in using ExtPascal.

But maybe the new garbage collector no longer has the problem; in that case,
my remarks are void.

>
>> I know that the garbage collector was reworked, but the correct
>> implementation would have been to remove the garbage collector
>> altogether and use TComponent decsendents instead.
>
> Because the high demand of it, some of us could convince Wanderlan that it would make ExtPascal better in the long run. Wanderlan is considering to do exactly that. See... ;)

Glad to hear that. Tell him he should also get rid of the one-thread-per-session
model, because it is simply not correct in many circumstances. It is visible
in the use of threadvars.

Michael.