Total stack size and memory of a program in Keil

Is there a way to determine the total stack size available and consumed by the variables in the program?

Same for the memory i.e total available and consumed by the program? It seems there's a stack overflow or the program is accessing something beyond its limit which is resulting in garbage characters in debug print viewer.

Look at what code is causing the Error! Work backward from there. Consider bisecting the additional code until you understand exactly which variable pushes you over the edge.

Fill it with something you can recognize. Say it's 0x1000 in size, fill that space with 'C' (0x43), look at it with a viewer, and see the 'C' characters get eroded as the tide of stack usage ebbs in and out of the call trees. Remember how stacks work on this CPU, they descend downward. Stack usage here is 0x1000-0x0374

20000000 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43   CCCCCCCCCCCCCCCC
20000010 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43   CCCCCCCCCCCCCCCC
20000020 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43   CCCCCCCCCCCCCCCC
20000030 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43   CCCCCCCCCCCCCCCC
...
20000350 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43   CCCCCCCCCCCCCCCC
20000360 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43   CCCCCCCCCCCCCCCC
20000370 : 43 43 43 43 FE BD F7 B5 - 16 46 0D 46 00 24 FF F7   CCCC.....F.F.$..
20000380 : A4 FF 76 4F 38 46 FF F0 - 3B FE 04 28 11 D0 FF F7   ..vO8F..;..(....
20000390 : 71 FE 0E E0 28 5B C0 43 - 01 04 28 5B 08 43 00 99   q...([.C..([.C..
...
20000FD0 : 00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00   ................
20000FE0 : 61 70 68 31 00 00 00 00 - 00 00 00 00 00 00 00 00   aph1............
20000FF0 : 00 00 00 00 00 00 00 00 - 00 00 11 00 31 00 C0 00   ............1...

If you suspect something, do some testing/analysis to prove or disprove the theory. Look at things you can inspect.

20000000 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43 CCCCCCCCCCCCCCCC 20000010 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43 CCCCCCCCCCCCCCCC 20000020 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43 CCCCCCCCCCCCCCCC 20000030 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43 CCCCCCCCCCCCCCCC ... 20000350 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43 CCCCCCCCCCCCCCCC 20000360 : 43 43 43 43 43 43 43 43 - 43 43 43 43 43 43 43 43 CCCCCCCCCCCCCCCC 20000370 : 43 43 43 43 FE BD F7 B5 - 16 46 0D 46 00 24 FF F7 CCCC.....F.F.$.. 20000380 : A4 FF 76 4F 38 46 FF F0 - 3B FE 04 28 11 D0 FF F7 ..vO8F..;..(.... 20000390 : 71 FE 0E E0 28 5B C0 43 - 01 04 28 5B 08 43 00 99 q...([.C..([.C.. ... 20000FD0 : 00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................ 20000FE0 : 61 70 68 31 00 00 00 00 - 00 00 00 00 00 00 00 00 aph1............ 20000FF0 : 00 00 00 00 00 00 00 00 - 00 00 11 00 31 00 C0 00 ............1...