Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Pointer to a struct (with pointers) *** glibc detected *** double free
Top Forums Programming Pointer to a struct (with pointers) *** glibc detected *** double free Post 302263166 by jatoo on Monday 1st of December 2008 02:08:15 AM
Old 12-01-2008
Pointer to a struct (with pointers) *** glibc detected *** double free
I am using a structure defined as follows

Code:
struct gene_square
{
    double *x;
    double *y;
};

I have class, with a member function which is a pointer of this type:

Code:
gene_square* m_Genes;

I am allocating memory in the constructors like this:

Code:
m_Genes = new gene_square[square_genome_size];
    for (ii=0; ii<square_genome_size; ii++)
    {
        (m_Genes+ii)->x = new double[POINTS];
        (m_Genes+ii)->y = new double[POINTS];
    }

And my destructor does this:

Code:
if(m_Genes != NULL)
    {
        for(ii=0; ii<square_genome_size; ii++)
        {
            if (((m_Genes+ii)->x)!=NULL)
            {
                delete [] (m_Genes+ii)->x;
            }
            if (((m_Genes+ii)->y)!= NULL)
            {    
                delete [] (m_Genes+ii)->y;
            }
        }
        delete [] m_Genes;
    }

But when the destructor is called I am getting a glibc double free error.

Code:
*** glibc detected *** ./Evolution: double free or corruption (fasttop): 0x08055008 ***

And I can't work it out.

Anyone able to help?
 

10 More Discussions You Might Find Interesting

1. Programming

*** glibc detected *** free(): invalid next size (normal): 0x0000000000503e70 ***

hi, I have made a small C program that make use of malloc and free for processing bitmap images. when i try to run the program, I am getting a error something like *** glibc detected *** free(): invalid next size (normal): 0x0000000000503e70 *** I am not sure of which free() is causing this... (1 Reply)
Discussion started by: vbreddy
1 Replies

2. Programming

*** glibc detected *** double free or corruption: 0x40236ff4 ***

when i try to use the class i wrote, i either get this: *** glibc detected *** double free or corruption: 0x40236ff4 *** and the proccess exits with an error code of 0; or it segfaults. could someone look at my header file (with imp.) to give me some insight as to why its not working? ... (19 Replies)
Discussion started by: norsk hedensk
19 Replies

3. Homework & Coursework Questions

C++ struct pointers & functions

Hi All, My latest assignment (practice not coursework!) is to write prototype interactive exam/test console application. I've used structs to store the question information (not sure if this was the best way to do it?) and I have the following code that outputs each question and it's possible... (0 Replies)
Discussion started by: pondlife
0 Replies

4. Homework & Coursework Questions

Passing pointers to struct

Hi, i'm trying to copy a struct into a binary file using the unix instruction write, so i declare and fill the struct "superbloque" in one function "initSB" and then i pass the pointer to another function called bwrite (for block write) which calls write. The problem is that i call the function... (2 Replies)
Discussion started by: ignatius3
2 Replies

5. Programming

Using pointers to struct members as args to functions

In a well-known book on the C language, there is an example of an efficient method for using a struct member as an argument to a function. (I'm a C noob, but I believe the correct terminology might be: use call-by-reference instead of call-by-value.) The function is printf. Anyway, here's a... (5 Replies)
Discussion started by: uiop44
5 Replies

6. Programming

Pointer to pointers

Hi guys, I'm trying to understand pointers in C and made a simple example and I've problems with It. Can someone help? #include <stdio.h> #include <stdlib.h> #include <assert.h> int f1(char **str_); int main(int argc, char **argv) { char *str = NULL; f1(&str); ... (3 Replies)
Discussion started by: pharaoh
3 Replies

7. Programming

*** glibc detected *** : malloc(): memory corruption (fast)

Hi Friends, while executing the below code, am getting *** glibc detected *** ./ok: malloc(): memory corruption (fast) error, please suggest how to solve this issue. #include <stdio.h> #include <string.h> #include <sqlca.h> #include <alloca.h> /* Define constants for VARCHAR... (2 Replies)
Discussion started by: mpjobsrch
2 Replies

8. Programming

*** glibc detected *** ./a.out malloc() memory corruption

I am facing a problem of memory corruption. The loop runs for the first time but does not go through the second time. What could be the problem? for(int z=0;z<2;z++) { fp=fopen("poly.dat","r"); /*do something which reads this file into a 2D array*/ fclose(fp); ... (10 Replies)
Discussion started by: dare
10 Replies

9. Programming

C++ glibc detected double free or corruption(!prev) using shared library

Currently I test a shared library vendor provided in linux , the following is the simple source : #include <iostream> using namespace std; extern int test1(); extern int test2(); int main() { cout << "hello world" << endl ; return 0 ; cout << "Test 1" << endl; ... (6 Replies)
Discussion started by: barfatchen
6 Replies

10. Homework & Coursework Questions

FORTRAN error *** glibc detected ***

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: I'm doing aproximation of derivative called five-point stencil. For every value of x, in interval , in step... (0 Replies)
Discussion started by: antonija
0 Replies

LEARN ABOUT SUSE

gtk2::pagesetup

Gtk2::PageSetup(3)					User Contributed Perl Documentation					Gtk2::PageSetup(3)

NAME

       Gtk2::PageSetup

HIERARCHY

	 Glib::Object
	 +----Gtk2::PageSetup

METHODS

   pagesetup = Gtk2::PageSetup->new
   pagesetup = Gtk2::PageSetup->new_from_file ($file_name)
       o   $file_name (localized file name)

       May croak with a Glib::Error in $@ on failure.

       Since: gtk+ 2.12

   pagesetup = Gtk2::PageSetup->new_from_key_file ($key_file, $group_name)
       o   $key_file (Glib::KeyFile)

       o   $group_name (string or undef)

       May croak with a Glib::Error in $@ on failure.

       Since: gtk+ 2.12

   double = $setup->get_bottom_margin ($unit)
       o   $unit (Gtk2::Unit)

   $setup->set_bottom_margin ($margin, $unit)
       o   $margin (double)

       o   $unit (Gtk2::Unit)

   double = $setup->get_left_margin ($unit)
       o   $unit (Gtk2::Unit)

   $setup->set_left_margin ($margin, $unit)
       o   $margin (double)

       o   $unit (Gtk2::Unit)

   $setup->load_file ($file_name)
       o   $file_name (string)

       May croak with a Glib::Error in $@ on failure.

       Since: gtk+ 2.14

   $setup->load_key_file ($key_file, $group_name)
       o   $key_file (Glib::KeyFile)

       o   $group_name (string or undef)

       May croak with a Glib::Error in $@ on failure.

       Since: gtk+ 2.14

   pageorientation = $setup->get_orientation
   $setup->set_orientation ($orientation)
       o   $orientation (Gtk2::PageOrientation)

   double = $setup->get_page_height ($unit)
       o   $unit (Gtk2::Unit)

   double = $setup->get_page_width ($unit)
       o   $unit (Gtk2::Unit)

   double = $setup->get_paper_height ($unit)
       o   $unit (Gtk2::Unit)

   $setup->set_paper_size_and_default_margins ($size)
       o   $size (Gtk2::PaperSize)

   papersize = $setup->get_paper_size
   $setup->set_paper_size ($size)
       o   $size (Gtk2::PaperSize)

   double = $setup->get_paper_width ($unit)
       o   $unit (Gtk2::Unit)

   double = $setup->get_right_margin ($unit)
       o   $unit (Gtk2::Unit)

   $setup->set_right_margin ($margin, $unit)
       o   $margin (double)

       o   $unit (Gtk2::Unit)

   $setup->to_file ($file_name)
       o   $file_name (localized file name)

       May croak with a Glib::Error in $@ on failure.

       Since: gtk+ 2.12

   $setup->to_key_file ($key_file, $group_name)
       o   $key_file (Glib::KeyFile)

       o   $group_name (string or undef)

       Since: gtk+ 2.12

   double = $setup->get_top_margin ($unit)
       o   $unit (Gtk2::Unit)

   $setup->set_top_margin ($margin, $unit)
       o   $margin (double)

       o   $unit (Gtk2::Unit)

ENUMS AND FLAGS

   enum Gtk2::PageOrientation
       o   'portrait' / 'GTK_PAGE_ORIENTATION_PORTRAIT'

       o   'landscape' / 'GTK_PAGE_ORIENTATION_LANDSCAPE'

       o   'reverse-portrait' / 'GTK_PAGE_ORIENTATION_REVERSE_PORTRAIT'

       o   'reverse-landscape' / 'GTK_PAGE_ORIENTATION_REVERSE_LANDSCAPE'

   enum Gtk2::Unit
       o   'pixel' / 'GTK_UNIT_PIXEL'

       o   'points' / 'GTK_UNIT_POINTS'

       o   'inch' / 'GTK_UNIT_INCH'

       o   'mm' / 'GTK_UNIT_MM'

SEE ALSO

       Gtk2, Glib::Object

COPYRIGHT

       Copyright (C) 2003-2008 by the gtk2-perl team.

       This software is licensed under the LGPL.  See Gtk2 for a full notice.

perl v5.12.1							    2010-07-05							Gtk2::PageSetup(3)
All times are GMT -4. The time now is 01:51 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy