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  1. #include <iostream>
  2.  
  3. #include <cstdlib>
  4.  
  5. void* operator new(std::size_t count)
  6. {
  7.   void *allocated = std::malloc(count);
  8.   std::cout << __PRETTY_FUNCTION__ << " with count " << count << " : " << allocated << std::endl;
  9.   return allocated;
  10. }
  11.  
  12. void operator delete(void* ptr) noexcept
  13. {
  14.   std::cout << __PRETTY_FUNCTION__ << " with ptr " << ptr << std::endl;
  15.   std::free(ptr);
  16. }
  17.  
  18. struct myclass
  19. {
  20.   myclass() { std::cout << __PRETTY_FUNCTION__ << std::endl; }
  21.   ~myclass() { std::cout << __PRETTY_FUNCTION__ << std::endl; }
  22.  
  23.   short dummy;
  24. };
  25.  
  26. int main()
  27. {
  28.   std::cout << "sizeof(size_t) : " << sizeof(std::size_t) << std::endl;
  29.   std::cout << "sizeof(myclass) : " << sizeof(myclass) << std::endl;
  30.   myclass *arr = new myclass[3];
  31.   std::cout << "arr : " << arr << std::endl;
  32.  
  33.   delete[] arr;
  34. }
  35.  
Success #stdin #stdout 0s 3460KB
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stdin
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Standard input is empty
stdout
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sizeof(size_t) : 4
sizeof(myclass) : 2
void* operator new(std::size_t) with count 10 : 0x9a2ca10
myclass::myclass()
myclass::myclass()
myclass::myclass()
arr : 0x9a2ca14
myclass::~myclass()
myclass::~myclass()
myclass::~myclass()
void operator delete(void*) with ptr 0x9a2ca10
https://ideone.com/9KVUvZ
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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