Overriding new with debug version without damaging placement new

Question

Microsoft runtime library provides debug version of allocation functions. For C++ this is a debug variant of operator new with the signature:

void *operator new(size_t size, int blockType, const char *filename, int linenumber);

and a macro is defined like

#define DEBUG_NEW new(_NORMAL_BLOCK, __FILE__, __LINE__)

Now to instrument all allocations, one normally defines

#if defined DEBUG_NEW
#define new DEBUG_NEW
#endif

However this definition breaks any place that uses placement new, because the two sets of arguments end up being syntax error. Now I can easily handle the few uses in our code, but the standard library and boost use placement new all over the place. So defining this globally means including a lot of stuff before the definition and that slows down compilation.

So would there be any way to instrument allocations in our code without pulling in headers just because they contain placement new and without having to either put the last define above in all files or writing DEBUG_NEW manually?

Answer 1

#pragma push_macro("new")
#undef new

new(pointer) my_class_t(arg1, arg2);

#pragma pop_macro("new")

or

#pragma push_macro("new")
#undef new

#include <...>
#include <...>
#include <...>

#pragma pop_macro("new")