# How do you calculate maximum stack size?

## How do you calculate maximum stack size?

The most common way to determine the deepest stack usage is to initialize the stack memory with some known but unusual value, then periodically (or at the end of a big test run) see where that pattern stops. This is exactly how the IAR IDE determines the amount of stack used.

## What is stack limit?

Stacking limit by number. Function/description : To indicate that the items shall not be vertically stacked beyond the specified number, either because of the nature of the transport packaging or because of the nature of the items themselves.

Why is stack size limit?

The maximum stack size is static because that is the definition of “maximum”. Any sort of maximum on anything is a fixed, agreed-upon limiting figure. If it behaves as a spontaneously moving target, it isn’t a maximum. Stacks on virtual-memory operating systems do in fact grow dynamically, up to the maximum.

### Is stack size fixed?

A typical stack is an area of computer memory with a fixed origin and a variable size. Initially the size of the stack is zero. Push – Data items are placed at the location pointed to by the stack pointer, and the address in the stack pointer is adjusted by the size of the data item.

### What means stack size?

The stack size is determined when the thread is created since it needs to occupy contiguous address space. That means that the entire address space for the thread’s stack has to be reserved at the point of creating the thread. If the stack is too small then it can overflow.

Why is stack size limited?

The stack need to be stored in continuous memory locations. This means that you cannot randomly allocate the stack as needed, but you need to at least reserve virtual addresses for that purpose. The larger the size of the reserved virtual address space, the fewer threads you can create.

## Why is stack size so small?

Increasing the stack size would involve moving the heap, which would invalidate every single heap pointer in the program (which, typically, would be the vast majority of pointers). As for why it’s so small, it’s because the individual stack frames are small.