On 07/24/2013 05:11 AM, hex wrote:
> I find a strange things: Whether DIE(Debug Information Entry) of a
> "static const int" member in a class has the attribute
> "DW_AT_const_value" depends on whether there is a virtual function
> defined in the class. Is it a expected behavior for GCC? And the
> attribute "DW_AT_const_value" matters because GDB could print the
> member's address if it does not have the attribute, otherwise GDB
> could not.
>
> My test case is as following:
> // symbol.cpp
> class Test{
> private:
> const static int hack;
> public:
> virtual void get(){}
> };
>
> const int Test::hack = 3;
>
> int main()
> {
> Test t;
> return 0;
> }
You'll get the DW_AT_const_value attribute when the compiler has
completely optimized away the variable, and thus when there's no
address for it at all.
The only real question is, why does this trivial virtual function
affect that optimization at all...
r~
