Hi,
Sorry if this is not a bug. But this is something bothers me a lot
these days.
I recently switched my OS from Solaris to Mandrake Linux 7.0.
It seems I have some problem debugging my c++ code using gdb. Here is a
sample code:
------------------------------------------------------------------------
#include <iostream.h>
class MyClass
{
private:
int a;
public:
MyClass() {a = 1;}
int Get_a() {return a;}
};
main()
{
MyClass inst;
cout << inst.Get_a() << endl;
}
------------------------------------------------------------------------
After compiling the code using "g++ -g main.cxx", I launch gdb by
"gdb a.out". And start tracing the code:
------------------------------------------------------------------------
[cwchang@localhost ~/tmp]$ g++ -g main.cxx
[cwchang@localhost ~/tmp]$ a.out
1
[cwchang@localhost ~/tmp]$ gdb a.out
GNU gdb 19991116
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i586-mandrake-linux"...
(gdb) b main
Breakpoint 1 at 0x8048656: file main.cxx, line 16.
(gdb) r
Starting program: /home/cwchang/tmp/a.out
Breakpoint 1, main () at main.cxx:16
16 MyClass inst;
(gdb) n
18 cout << inst.Get_a() << endl;
(gdb) p inst.Get_a()
Cannot resolve method MyClass::Get_a to any overloaded instance
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(gdb) ptype inst
type = class MyClass {
private:
int a;
public:
MyClass & operator=(MyClass const &);
MyClass(MyClass const &);
MyClass(void);
int Get_a(void);
int Get_b(int);
}
(gdb) info source
Current source file is main.cxx
Compilation directory is /home/cwchang/tmp/
Located in /home/cwchang/tmp/main.cxx
Contains 22 lines.
Source language is c++.
Compiled with stabs debugging format.
(gdb)
----------------------------------------------------------------------
"Cannot resolve method MyClass::Get_a to any overloaded instance"
What does this mean? It seems I cannot not execute the expression
because gdb cannot find the corresponding reference. I have no
problem debugging this piece of code on my Solaris machine (the
command "p inst.Get_a()" have no problem get executed) Is this
a machine-dependent issue?
Any idea? Thanks in advance.
Jim
