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gdb namespaces/wrapper bug?
- From: Klaas Gadeyne <Klaas dot Gadeyne at mech dot kuleuven dot ac dot be>
- To: gdb at sources dot redhat dot com
- Date: Thu, 15 Jan 2004 13:37:45 +0100 (CET)
- Subject: gdb namespaces/wrapper bug?
Hi,
I encountered a strange problem while debugging and I'm not sure wether
the problem is coming from gcc-3.x or gdb?
Consider the following code, consisting of 3 files
=========================================================================
=========================================================================
[klaas@c014 /tmp]$ cat wrapper_object.h
#include <vector>
namespace BASE
{
class Foo
{
public:
Foo(){};
virtual ~Foo(){};
virtual void Method();
};
}
=========================================================================
[klaas@c014 /tmp]$ cat wrapper_object.cpp
#include "wrapper_object.h"
namespace BASE
{
void
Foo::Method(){};
}
==========================================================================
[klaas@c014 /tmp]$ cat wrapper.cpp
#include "wrapper_object.h"
namespace WRAPPED
{
class Foo : public BASE::Foo
{
public:
Foo() : BASE::Foo(){};
virtual ~Foo(){};
};
}
using namespace WRAPPED;
int main()
{
Foo mywrapped;
return 0;
}
==========================================================================
==========================================================================
This compiles and runs just fine (compile wrapper_object.cpp, compile
wrapper.cpp linking with wrapper_object.o), but when debugging the code
with gdb (I only tried with both 5.3-debian and 6.0-debian (the latest
from testing and unstable)) and trying to display the mywrapped variable,
gdb enters in a infinite loop:
(gdb) display mywrapped
1: mywrapped = {<Foo> = {<Foo> = ....
and finally segfaults.
Used compilers (all debian packages):
[klaas@c014 /tmp]$ g++ --version
g++ (GCC) 3.3.3 20040110 (prerelease) (Debian)
I also tried with 3.3.2, but that gives the same result.
The problem does not exist when:
- The code is compiled with g++ 2.95.4
- All code is inlined in 1 file (yes, that's why there are 3 files above :)
- I omit the member function method and put the constructor implementation
in the cpp file.
- When Foo in namespace WRAPPED is renamed into Boo
Is this a gdb problem? or is is related to gcc 3.x? Or am I missing
something important here?
thanks,
klaas