Re: Receiving error "SEGV_MAPERR - Address not mapped to object"

From:

"mlimber" <mlimber@gmail.com>

Newsgroups:

comp.lang.c++

Date:

16 Mar 2007 10:57:08 -0700

Message-ID:

<1174067828.188503.248850@n76g2000hsh.googlegroups.com>

On Mar 16, 9:46 am, klaritydef...@yahoo.co.in wrote:

Hi,

I am receving the following error when I run my application (build on C
++ code)

Program received signal SIGSEGV, Segmentation fault
  si_code: 1 - SEGV_MAPERR - Address not mapped to object.

I debug using gdb to find the error and located the position where it
is throwing an error

MyFile.h
-------------
const int MAX_VALUE = 10000;
class MyClass
{
  public:
    MyClass();
    virtual ~MyClass();
    class InnerClass
    {
      public:
        InnerClass() { }
        ~InnerClass() { }
    };

  private:
    InnerClass arrObj[MAX_VALUE];
    InnerClass *ptrObj;

};

MyFile.cpp
----------------
#include "MyFile.h"
MyClass::MyClass()
{
  ptrObj = arrObj; // Error is thrown at this line
  ....}

...

I don't find anything wrong with the code. Could anyone tell me why am
I getting this signal?

I don't see anything wrong with the snippet you show. Chances are,
it's a pointer error at some (possibly unrelated) part of the code
that is causing it. Post a *minimal* but *complete* program (that is,
one that has all the code and only that code) that demonstrates your
problem. See:

http://www.parashift.com/c++-faq-lite/how-to-post.html#faq-5.8

BTW, you should probably be using an initializer list instead of
assignment. See:

http://www.parashift.com/c++-faq-lite/ctors.html#faq-10.6

You might also consider using a std::vector rather than an array:

http://www.parashift.com/c++-faq-lite/containers.html#faq-34.1

Cheers! --M