---
title: "When does the stack really overflow?"  
description: "When does the stack really overflow?"  
author: "Steilla Mitchel"  
published: 2023-07-19  
updated: 2023-07-19  
canonical: https://www.mindstick.com/forum/159149/when-does-the-stack-really-overflow  
category: "exception handling"  
tags: ["c#", "java", "exception", "programming language"]  
reading_time: 2 minutes  

---

# When does the stack really overflow?

When does the [stack](https://www.mindstick.com/blog/301746/why-is-stack-overflow-so-important-for-developers) really [overflow](https://www.mindstick.com/interview/1711/what-is-overflow-properties-in-css)?

## Replies

### Reply by Aryan Kumar

The stack overflow can happen when a program uses more stack than the stack has. This can generally happen in the following cases:

- **When a recursive function calls itself too many times.** For example, the following code will cause a stack overflow:

```plaintext
public void RecursiveFunction(int n) {
  if (n > 0) {
    RecursiveFunction(n - 1);
  }
}
```

- **When a program allocates large amounts of memory on the stack.** For example, the following code will cause a stack overflow:

```plaintext
public void LargeAllocation() {
  var array = new byte[1024 * 1024];
}
```

- **When a program has a bug that causes it to allocate too much memory on the stack.** For example, the following code has a bug that causes it to allocate too much memory on the stack:

```plaintext
public void BugFunction() {
  var array = new byte[int.MaxValue];
}
```

The stack overflow can cause the program to crash or to behave in an unexpected way.

There are a few things that can be done to prevent stack overflows:

- **Avoid using recursive functions.** If you do need to use recursive functions, try to use them sparingly and make sure that they do not call themselves too many times.
- **Avoid allocating large amounts of memory on the stack.** If you need to allocate large amounts of memory, try to allocate it on the heap instead.
- **Have your code reviewed by a qualified engineer.** If you are not sure whether your code is prone to stack overflows, have it reviewed by a qualified engineer.


---

Original Source: https://www.mindstick.com/forum/159149/when-does-the-stack-really-overflow

Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.