3.5.13 How Do I Know What Resources Are Being Used by Each Function?

In the assembly list file there is information printed for every C function, including library functions. See 3.5.10 How Do I Know What Code the Compiler Is Producing? for more on creating an assembly listing file.

To see information on functions calls, you can view the Call Graph in MPLAB X IDE (Window>Output>Call Graph). You must be in debug mode to see this graph. Right click on a function and select “Show Call Graph” to see what calls this function and what it calls.

Auto, parameter and temporary variables used by a function may overlap with those from other functions as these are placed in a compiled stack by the compiler, see 9.3 Auto Variable Allocation and Access.