Re: Porting from Windows to Linux

From: Ioannis Vranos (ivr_at_guesswh.at.grad.com)
Date: 06/18/04 

Date: Fri, 18 Jun 2004 12:56:53 +0300

Prasanna wrote:
> Hi,
>
> I have been developing some libraries using VC++ 6.0. My work is
> complete now and the code works just fine. It has been tested under
> many circumstances and i have not encountered any problems. Now, I
> would like to port it to gcc. Initially compiling it with gcc produced
> a few errors, asking for some 'const' declarations in places where
> VC++ would not bother to. But then, i was able to compile it and
> create an executable. The problem is the executable crashes when i run
> it.
>
> I tried it with cygwin latest version and g++ in suse 8.1. When i
> tried to debug it with DDD in suse, the program halts when i am
> returning a reference. I checked for possible memory problems, like
> returning a reference for a local variable or chaning the address of
> an allocated memory. But there are none like that.
>
> For example, the place where my program halts is this:
>
> vector<unsigned>& GF::primitive()
> {
> return ir;
> }
>
> where 'ir' is a protected data member of class GF, as shown.
>
> class GF{
> ....
> protected:
> vector<unsigned> ir;
> };
>
> If i try to step through return, it goes inside vector class and i get
> lost.
> I have no idea why this happens. Can someone elighten me on this.
>
> Regards,
> Prasanna.

Does the following code crash to you?

#include <vector>

int main()
{
  using std::vector;

  class test
  {
          protected:
          vector<unsigned>ir;
          
          public:
          vector<unsigned>& primitive() { return ir; }
  };

  test a;

  vector<unsigned> &rir=a.primitive();
}

Regards,

Ioannis Vranos

Relevant Pages

  • Porting from Windows to Linux
    ... returning a reference. ... I checked for possible memory problems, ... the place where my program halts is this: ... where 'ir' is a protected data member of class GF, ...
    (comp.lang.cpp)
  • Re: Porting from Windows to Linux
    ... > returning a reference. ... I checked for possible memory problems, ... > where 'ir' is a protected data member of class GF, ... 'this' pointer). ...
    (comp.lang.cpp)