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#include <stddef.h>
void *p;
int fail;
class HeapTracked {
public:
virtual ~HeapTracked() = 0;
void *operator new(size_t size);
void operator delete(void *ptr);
static bool isObjectAllocation(const HeapTracked *ptr);
};
HeapTracked::~HeapTracked(){}
void * HeapTracked::operator new(size_t size)
{
void * memPtr = ::operator new(size);
p = memPtr;
return memPtr;
}
void HeapTracked::operator delete(void *ptr)
{
if (p != ptr)
fail = 1;
::operator delete(ptr);
}
bool HeapTracked::isObjectAllocation(const HeapTracked *ptr)
{
if (p != const_cast<void*>(dynamic_cast<const void*>(ptr)))
fail = 1;
return false;
}
class Mumble1: public virtual HeapTracked {
double d;
public:
virtual ~Mumble1(){}
};
class Mumble2: public virtual HeapTracked {
double d;
public:
virtual ~Mumble2(){}
};
class Foo: virtual public HeapTracked,
virtual public Mumble1,
virtual public Mumble2 {
public:
~Foo(){}
};
int main()
{
Foo *pf = new Foo;
pf->isObjectAllocation(pf);
Mumble1 *pm1 = pf;
pm1->isObjectAllocation(pm1);
Mumble2 *pm2 = pf;
pm2->isObjectAllocation(pm2);
// delete pf;
// delete pm1;
delete pm2;
return fail;
}
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