[lwip-users] help, stuck in endless loop inside mem_malloc()

[Francois Bouchard]

Hi all,

 

Sometimes, in *debug mode* my program get stuck in mem_malloc(), and can't get out.  ptr scan the ram for a block, but is I can see with my debugger ptr does'nt scan thru (MEM_SIZE_ALIGNED - size), instead it get reseted before reaching that value. ptr then scan the ram, get reseted, and so on.

 

Maybe the debugger goes crazy, but in normal run program I'm also facing that kind of hanging.  It does'nt happen every tim I run the application.  But it always happens when I send SNMP t (walk) request snmp table.

 

The stack when it happens:

tcpip_thread

 ip_inpu

  udp_input

   snmp_recv

    snmp_msg_event

     snmp_msg_getnext_event

      snmp_varbind_alloc

       mem_malloc

 

setup:

lwIP 1.3.0

FreeRTOS

Code Warrior

 

any hints? 

regards,

__

Francois