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RE: [lwip-devel] RE: Crash Bug

From: Julian Gardner [RSD]
Subject: RE: [lwip-devel] RE: Crash Bug
Date: Wed, 6 Jun 2007 19:22:34 +0100

Bug sort of fixed

I have managed to stop the crash by wrapping all the exposed pbuf_???? with a 
single semaphore.

Now is there a switch in lwipopts i should be setting to stop this.

The problem seems to be that i have and ISR which triggers a pending task to 
read the rx buffer from the smsc9117 and when the http server is running 
(another task) i sometimes get the crash.

I used to be able to crash it in seconds but i have not managed to crash it 
since adding the semaphore in!

Julian Gardner

-----Original Message-----
From: address@hidden on behalf of Julian Gardner [RSD]
Sent: Mon 21/05/2007 09:32
To: lwip-devel
Subject: RE: [lwip-devel] RE: Crash Bug
Will download the new code and give it a test, only takes 30 seconds to

If it still fails I will try and do some debugging but have a deadline
as I need to be in germany with a new product, last minute deadlines.

Anybody going to Anga this week? Fancy a beer!!!


-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
Sent: 18 May 2007 22:19
To: address@hidden
Subject: [lwip-devel] RE: Crash Bug

Hi all,

seems our email server won't send mails to the list any more ... :-( ???
I'm not missing this subject, I sent some mails, only I don't get them 
bounced back...

OK, I'm working on a mem.c/memp.c update to catch buffer overruns (& 
underruns). The memp part is already checked in. But as Julian said it's

not an overflow...

I'm afraid I can't say much more about the subject. I'd say either there

are 2 or more threads in the core at the same time or it is kind of a 
bug in lwip, but the allocators work fine for me... (I did a lot of 
testing today :)


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