CMemoryLeaksFinder

What is this?

C++ have smart pointers and they should be used almost always, but C doesn't have that, so it's easy to forget about dynamic memory allocations, so this library simply finds memory leaks that were allocated with malloc/calloc/realloc and tell you information about that allocation. If you lazy to to download and install valgrind for some reason, this may be a nice code alternative to finding leaks.

How does it work?

This library is wrapping the malloc/calloc/realloc/free in a macro to keep track of the pointers that were allocated and freed.

Code Example

#include <stdlib.h>
#include "memleaks.h"

int main()
{
  INIT_MEMLEAKS; /* We must call it to initialize the library. */
  
  int* p   = (int*)malloc(sizeof(int));
  int* arr = (int*)malloc(sizeof(int) * 5);
  
  free(p);
  free(arr);
}

After compiling it with clang we get:

Great job! no leaks!

Now, let's comment our free calls, we then get:

Found 2 leaks:
 #1 Leaking address: 0x210b2c0, In file: 'test.c', In function: 'int main()', In line: 8
 #2 Leaking address: 0x210b2e0, In file: 'test.c', In function: 'int main()', In line: 9

Some Notes.

• This library probably not thread safety, I did not test it under multithreaded application.
• It does not cover operators new/delete of C++.
• It was designed to work with Ansi C aswell.