demo_new_delete.cpp

// demo_new_delete.cpp
#include <cstddef>
#include <new>

struct Base {
  Base();
  virtual ~Base();                 // virtual => emits D0, D1, D2
  static void* operator new(std::size_t);
  static void  operator delete(void*) noexcept;
};

struct Derived : Base {
  Derived();
  ~Derived() override;
  static void* operator new(std::size_t);
  static void  operator delete(void*) noexcept;
};

Base::Base() {}
Base::~Base() {}
void* Base::operator new(std::size_t n) { return ::operator new(n); }
void  Base::operator delete(void* p) noexcept { ::operator delete(p); }

Derived::Derived() {}
Derived::~Derived() {}
void* Derived::operator new(std::size_t n) { return ::operator new(n); }
void  Derived::operator delete(void* p) noexcept { ::operator delete(p); }

clang++ -std=c++17 -O0 -fno-inline -c demo_new_delete.cpp -o demo.o
nm -C demo.o | egrep 'Base|Derived|operator new|operator delete'
nm demo.o | egrep 'Base|Derived|_Znwm|_ZdlPv'
objdump -dr demo.o | less