Re: gdb does not print the reference to the base class members

["Peng Yu" <pengyu.ut@gmail.com>]

Hi,

This is the version that I'm using. Will the problem be solved if I
upgrade to the latest version, GDB version 6.7.1?

Thanks,
Peng

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On Nov 19, 2007 2:39 AM, Douglas Evans <dje@google.com> wrote:
> I  believe this is gcc bug 27574.
>
>
> On Nov 18, 2007 4:35 PM, Peng Yu <pengyu.ut@gmail.com> wrote:
> > Hi,
> >
> > I try to print reference x for the following problem. But gdb does not
> > print the one in class B refered to class A? Do you know how to print
> > its value?
> >
> > Thanks,
> > Peng
> >
> > (gdb) b 22
> > Breakpoint 1 at 0x8048694: file main.cc, line 22.
> > (gdb) b 14
> > Breakpoint 2 at 0x8048706: file main.cc, line 14.
> > (gdb) r
> > Failed to read a valid object file image from memory.
> >
> > Breakpoint 1, main () at main.cc:22
> > 22        B b(10);
> > (gdb) p x
> > $1 = (int &) @0xbffd86cc: 5
> > (gdb) c
> >
> > Breakpoint 2, B (this=0xbffd86c8, a=10) at main.cc:14
> > 14            std::cout << x << std::endl;
> > (gdb) p x
> > No symbol "x" in current context.
> >
> >
> >
> > #include <iostream>
> >
> > class A {
> >   public:
> >     A(int a) : _a(a) { }
> >   protected:
> >     int _a;
> > };
> >
> > class B : public A {
> >   public:
> >     B(int a) : A(a) {
> >       int &x = A::_a;//can not print from gdb, Line 12
> >       std::cout << x << std::endl;
> >     }
> > };
> >
> >
> > int main(){
> >   int a = 5;
> >   int &x = a;//this one can be printed in gdb, Line 22
> >   B b(10);
> >   std::cout << x << std::endl;
> > }
> >
>