What is stack overflow error message in C?

How can we minimize the stack overflow in C?

A stack overflow occurs when a program runs the virtual function of a virtual base class in a recursive manner with no end condition.

The effect of this is to exceed the allocation space for stack frames, ie, the virtual bases of the derived class, and cause the function to become uncontrollable, resulting in a segmentation fault. It could be possible for the user to mitigate the risk by implementing appropriate memory management techniques; however, most modern compilers are equipped with an extension that mitigates the risk of a stack overflow in the compilation process itself (this is known as stack protection). The compiler may generate a warning message indicating that it has detected a stack overflow in the compilation process and that all or most of the calls to the virtual function will become in-lined (optimized) because they never leave the loop.

Some programmers think that there can be some exceptions to the rule and these exceptions are referred to as use-after-free problems. For example, suppose the programmer wanted to perform the delete operation on an empty vector. This attempt results in a compiler warning message since he has not deleted the last element of the vector first. However, there is no problem with this attempt and it works as the delete operator should. It follows that even if we get a stack overflow in the compilation of the class, if it is an exception to the rule and it does not create an issue at run time, the stack overflow in the compilation must be prevented.

There are two kinds of stack overflows. These are described as follows: Direct or call stack overflows: The situation arises when the code creates too many stack frames without a stop condition (ie, it's not possible for the virtual function to return to the point where it started from). In these cases, the compiler would normally optimize and in-line a portion of the function. If we get a stack overflow during the compile time, then it is possible that the function may be optimized to make it uncontrollable and generate an out-of-memory error.

The situation arises when the code creates too many stack frames without a stop condition (ie, it's not possible for the virtual function to return to the point where it started from).

What is stack overflow and underflow in C?

What does stack overflow and underflow mean?

I am trying to understand what exactly is an overflow/underflow of a stack variable in C? When and why it occurs

Overflow on the stack is "the maximum number of bytes we have room for on the stack" while Underflow is the minimum number of bytes we will allocate on the stack when a function is called. Stack overflow can occur because you don't think you need enough room for that function to function as intended and some variables will overflow the stack. The way you'd fix it would be to either explicitly or implicitly allocate enough space (in a buffer or through malloc(sizeof)).

Stack underflow can occur as well, in which case memory will not be properly reserved on the stack. The way you'd fix it would be either to return fewer variables from your function or through proper allocation.

These terms do not seem to exist for the heap.

What is stack overflow error message in C?

The stack grows downward, so in your case the address of the global variable is lower than the address of your pointer.

Since the global variable is also a local variable, it is not visible from another source file, hence you get this error. You are accessing an uninitialized variable. You need to initialize it, or use dynamic memory allocation (using malloc, for instance).

If your intent is to simply create a global variable that can be referenced anywhere else in the program (ie not tied to a particular source file), you should look into global variables.

Is there a stack in C?

On March 1st, 2025, I submitted a program called stack.

C to comp.lang.c for consideration. I wanted to see if it would get accepted. As far as I can tell, the only response I received was an email from a moderator who said "Not that I know of. There is no Stack." This was not really a fair response to my question. For one thing, it implies that there are programs that are not in comp. But the most important part is that it implies that there is no data structure like a stack. There's lots of data structures that have a name and are used to implement stacks.

My question to you is, ? There is a queue in C. And I believe it works well. I'm not going to argue about whether a queue or a stack is more useful. But I think it is important to answer this question. I don't know of any standard way of representing a stack in C. (Yes, it's called the "no stack" argument, but it is unfair to call me on it.)

I am not sure how many different ways there are to represent a stack in C. A queue is a list. A stack is a doubly linked list. A queue has operations like push, pop, enqueue, dequeue, peek, first, last, and empty. A stack has operations like push, pop, enqueue, dequeue, peek, first, last, and empty. A queue is a linear data structure that can be accessed from either end. A stack is a linear data structure that can be accessed only from one end. A queue can be implemented as a stack or as a linked list. A stack can be implemented as a queue or as a doubly linked list. I don't know how many different ways there are to implement a stack as a queue. I will try to answer the question as well as possible. But I'm not sure how to answer this question.