Check if a pointer points to allocated memory on the heap

by

A proof it probably cannot be usefully done:

char * p1 = malloc(1);
free( p1 );
char * p2 = malloc(1);   // probably allocates same block as first malloc

Now both p1 and p2 point at same memory on heap, but only p2 is valid.

More Related Contents:

  1. Avoid memory leaks in C++ Pointers [closed]
  2. convert malloc to new c++ for struct
  3. In what cases do I use malloc and/or new?
  4. How do malloc() and free() work?
  5. Is it safe to delete a NULL pointer?
  6. How can I get the size of an array from a pointer in C?
  7. Dynamically allocating an array of objects
  8. Determine the size of a C++ array programmatically?
  9. What is the difference between “new” and “malloc” and “calloc” in C++? [duplicate]
  10. How to know if a pointer points to the heap or the stack?
  11. How can I get the size of a memory block allocated using malloc()? [duplicate]
  12. Explain this implementation of malloc from the K&R book
  13. Pointer-to-pointer dynamic two-dimensional array
  14. What happens when you deallocate a pointer twice or more in C++?
  15. Reason why not to have a DELETE macro for C++
  16. What do I need to do before deleting elements in a vector of pointers to dynamically allocated objects?
  17. dynamically allocated memory after program termination
  18. How to alloc a executable memory buffer?
  19. Memory allocation and deallocation across dll boundaries
  20. new, delete ,malloc & free
  21. What happen to pointers when vectors need more memory and realocate memory?
  22. Difference between list<Observer*>* and list<Observer*> in C++ [closed]
  23. When were pointers added to C / C++? [closed]
  24. What is the default constructor for C++ pointer?
  25. Why is there no reallocation functionality in C++ allocators?
  26. can’t modify char* – Memory access violation
  27. c++ delete pointer issue, can still access data [closed]
  28. Where ampersand “&” can be put when passing argument by reference?
  29. non-const pointer argument to a const double pointer parameter
  30. Polymorphism & Pointers to arrays [duplicate]

Leave a Comment