patchlwIP - A Lightweight TCP/IP stack - Patches: patch #7737, Initialize all global variables to...

 
 

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patch #7737: Initialize all global variables to 0 or NULL.

Submitter:  Bostjan Meglic <bostjanm>
Submitted:  Wed 07 Mar 2012 09:38:48 AM UTC
   
 
Category:  None Priority:  5 - Normal
Status:  Wont Do Privacy:  Public
Assigned to:  None Open/Closed:  Closed
Planned Release:  None

Wed 07 Mar 2012 10:44:52 AM UTC, comment #1: 

We've had this before, and voted against doing so as from the C standard, variables with static storage have to be initialized to 0 or NULL by the C startup code. If you have problems with this, you're either reinitializing lwIP or have a C compiler/runtime that doesn't conform to the standard.

See also this thread from lwip-users (be sure to read the whole thread):
https://lists.gnu.org/archive/html/lwip-users/2010-11/msg00024.html

If that doesn't help you, it might help to put all global lwIP variables (you might want to leave out the heap and the pools) into a dedicated section and zero that whole section in your own startup code.

Simon Goldschmidt <goldsimon>
Group administrator
Wed 07 Mar 2012 09:38:48 AM UTC, original submission:  


Bostjan Meglic <bostjanm>

 

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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2012-03-07 goldsimon StatusNone Wont Do
        Open/ClosedOpen Closed
    2012-03-07 bostjanm Attached File- Added 0001-Initialize-all-global-variables-to-0-or-NULL.patch, #25283

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