do I have RAM overflow

Question

I'm using nrf51, I noticed that when I disable some functions calling (in the file flash_memory_management.c ), the behavior or the function in the file ( fatigue.c ) is correct. this last function has many static data on it, its size is shown in the map file. but when I enable those functions of the file flash_memory_management.c , I noticed that the data on function (in the file fatigue. c) are corrupted. 
 my question is, 
 1 by viewing the map file, can this be caused by RAM overlow? does the RAM and the stack overlap?. in the map file : Total RW Size 7176 ( 7.01kB) 
 2 - would increasing stack size fix the issue?? 
 I already set the heap size to 0 : Heap_Size EQU 0 
 map file

Håkon Alseth · Accepted Answer

Hi, 
 I am not sure if you have a stack overflow issue runtime, but according to your map-file, everything is in order, and the initial stack pointer is located in a valid area: 
 __initial_sp 0x20003c10
 
 If you are getting a stack overflow runtime, you can view the core registers while debugging. The "SP" register shall then not go lower than address "&__initial_sp - 0x800" 
 Have you enabled assertions in your code? (add "DEBUG" to your preprocessor defines)
Do you check the return error-codes from function calls? 
 Cheers,
Håkon