example global ov of new/del

stuff/mem_debug.hh

+#include <cstdlib>
+#include <iostream>
+#include <string>
+
+//#define new(a, rest...) mynew( a, atoi(__LINE__), __FILE__, rest )
+
+// void * mynew( size_t sz, int line, char* file) throw (std::bad_alloc)
+void* mynew(size_t sz) throw(std::bad_alloc)
+{
+  //    std::cerr << "node::new" << std::endl;
+  return malloc(sz);
+}
+
+//#define new(...) mynew(...)
+
+// void* mynew[](std::size_t) throw (std::bad_alloc);
+// void* mynew(std::size_t, const std::nothrow_t&) throw();
+// void* mynew[](std::size_t, const std::nothrow_t&) throw();
+// void operator delete(void*, const std::nothrow_t&) throw();
+// void operator delete[](void*, const std::nothrow_t&) throw();
+//
+// void operator delete( void *pvMem )
+//{
+//    free( pvMem );
+//}
+
+
+void* operator new(unsigned long size)
+{
+  std::cout << "operator new(" << size << "):\t";
+
+  void* p = malloc(size);
+  if (!p)
+    throw "operator new() error";
+
+  std::cout << static_cast<void*>(p) << std::endl;
+
+  return p;
+}
+
+void* operator new[](unsigned long size)
+{
+  std::cout << "operator new[](" << size << "):\t";
+
+  void* p = malloc(size);
+  if (!p)
+    throw "operator new() error";
+
+  std::cout << static_cast<void*>(p) << std::endl;
+
+  return p;
+}
+
+void operator delete(void* p)
+{
+  std::cout << "operator delete(" << p << ")" << std::endl;
+
+  free(p);
+}
+
+void operator delete[](void* p)
+{
+  std::cout << "operator delete[](" << p << ")" << std::endl;
+
+  free(p);
+}