Strategies For Tracking Down Memory Leaks When You've Done Everything Wrong

Question

My program, alas, has a memory leak somewhere, but I\'ll be damned if I know what it is.

Its job is to read in a bunch of ~2MB files, do some parsing and string repl

Answer 1

Similar to Charlie Martin, you can do something like this:

static unigned __int64 _foo_id = 0;
foo::foo()
{
    ++_foo_id;
    if (_foo_id == MAGIC_BAD_ALLOC_ID)
        DebugBreak();
    std::werr << L"foo::foo @ " << _foo_id << std::endl;
}
foo::~foo()
{
    --_foo_id;
    std::werr << L"foo::~foo @ " << _foo_id << std::endl;
}

If you can recreate it, even once or twice with the same allocation id, this will let you look at what is happening right then and there (obviously TLS/threading has to be handled as well, if needed, but I left it out for clarity).