Getting information about where c++ exceptions are thrown inside of catch block?

Question

I\'ve got a c++ app that wraps large parts of code in try blocks. When I catch exceptions I can return the user to a stable state, which is nice. But I\'m not longer recei

Answer 1

This is possible with using SEH (structured exception handling). The point is that MSVC implements C++ exceptions via SEH. On the other hand the pure SEH is much more powerful and flexible.

That's what you should do. Instead of using pure C++ try/catch blocks like this:

try
{
    DoSomething();
} catch(MyExc& exc)
{
    // process the exception
}

You should wrap the inner code block DoSomething with the SEH block:

void DoSomething()
{
    __try {
        DoSomethingInner();
    }
    __except (DumpExc(GetExceptionInformation()), EXCEPTION_CONTINUE_SEARCH) {
        // never get there
    }
}

void DumpEx(EXCEPTION_POINTERS* pExc)
{
    // Call MiniDumpWriteDump to produce the needed dump file
}

That is, inside the C++ try/catch block we place another raw SEH block, which only dumps all the exceptions without catching them.

See here for an example of using MiniDumpWriteDump.