Why does this occur? *** glibc detected *** malloc(): memory corruption: 0x10013ff8 *** Post: 302367056

Sponsored Content

Top Forums Programming Why does this occur? *** glibc detected *** malloc(): memory corruption: 0x10013ff8 *** Post 302367056 by achenle on Saturday 31st of October 2009 08:04:51 PM

10-31-2009

Registered User

Quote:

Originally Posted by cdbug

Add return statement and change return type and it can work.

But it still fails after generating many vertices. Notice where failure occurs

This seems to be a general problem.

Thanks for all your help

____________________________________
Program received signal SIGSEGV, Segmentation fault.
0x0027ff92 in _int_malloc () from /lib/tls/libc.so.6
(gdb) bt
#0 0x0027ff92 in _int_malloc () from /lib/tls/libc.so.6
#1 0x0027f0fd in malloc () from /lib/tls/libc.so.6
#2 0x0804956e in make_vertex (ver=0xbfffb624, index=-1, se=0, ps=2)

Code:

vertex *root;
root = make_vertex(&root, -1, 0, -1);


static vertex* make_vertex(vertex **ver, int index, int s, int ps)
{
        ver = (vertex **)malloc(sizeof(vertex *)); //Here:fails
        if (ver == NULL)
            exit(1);

        *ver = (vertex *)malloc(sizeof(vertex));
        if ( *ver == NULL ) {
            printf("memory allocation error\n");
            exit(1);
        }

        (*ver)->id        = index;
        (*ver)->seq       = s;
        (*ver)->pos       = ps;
        (*ver)->clique    = 0;
        (*ver)->numOfPrev = 0;
        (*ver)->numOfVer  = 0;
        (*ver)->numOfNext = 0;
        (*ver)->prev      = NULL;
        (*ver)->next      = NULL;
        (*ver)->front     = NULL;
        (*ver)->back      = NULL;
        (*ver)->left      = NULL;
        (*ver)->right     = NULL;

    return *ver;
}

---------- Post updated at 12:37 PM ---------- Previous update was at 11:01 AM ----------

Tried to use make_vertex. It can change memory in this way. A new trouble takes place. Allocation really gives unexpected problems.

dataset[4] changes
__________________________________________________________________
110 r = make_vertex(&rho, -1, 0, i);
(gdb) p *(dataset+3)
$33 = 0x8145200 "AATTGTAAC"
(gdb) p *(dataset+4)
$34 = 0x8145a30 "GCTGAATGA"
(gdb) n
111 first = rho;
(gdb) p *(dataset+3)
$35 = 0x8145200 "AATTGTAAC"
(gdb) p *(dataset+4)
$36 = 0xb25a90 "\210Z�"

First, if you're going to overwrite the original contents of the pointer you pass it, why bother passing in its address in the first place?

Code:

static vertex* make_vertex( int index, int s, int ps )
{
    vertex *ver;
    ver = ( vertex * ) calloc( sizeof( vertex ) );
    if ( NULL != ver )
    {
        ver->id = index;
        ver->seq = s;
        ver->pos = ps;
    }
    return( ver );
}

If THAT blows up, your heap is getting corrupted before you even make the call to make_vertex().

achenle

View Public Profile for achenle

Find all posts by achenle

10 More Discussions You Might Find Interesting

1. 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? ...

2. Programming

Pointer to a struct (with pointers) * glibc detected * double free

I am using a structure defined as follows struct gene_square { double *x; double *y; };I have class, with a member function which is a pointer of this type: gene_square* m_Genes;I am allocating memory in the constructors like this: m_Genes = new gene_square; for (ii=0;...

3. Programming

solved: glibc detection corruption using a fork in popen

Hi, I am having a hell of a time getting this to work. So basically, I have opened a popen to run a program that is going to prompt an action to occur half way through, when it gets to this I need to create a separate process and do some stuff, then return to the original process. This works...

4. Programming

./match_pattern.out: malloc(): memory corruption: 0x0000000013a11600 ***

Hi All, I have a simple code which does some computation by matching string patterns. In brief: 1. The code reads .dat and .txt files. 2. .dat files are huge text files and .txt files contain some important words. 3. I am just doing strstr to find the patterns. 4. The function returns the...

5. Programming

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

*** glibc detected *** ./a.out: malloc(): memory corruption (fast): Posted A minute ago M trying to make multiway tree and dont know what happend when this part of code get executed: 01void ins(NODE *ptr) 02{ 03 //working 04 if(ptr!=NULL) 05 { 06 SNODE *var=NULL; 07 var=(SNODE...

6. Programming

glib detected: malloc() memory curruption

I am using libxml2 library for XMl parsing and libxml++ is C++ wrapper over that. So I am using API of libxml++. I am creating my class and composing instance xmlpp::Node *pNode in that. my class also have funciton prepareXPathQuery() which creates query string and have other fucntion...

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...

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); ...

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; ...

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...

LEARN ABOUT DEBIAN

mdb-ver

MDBTools(1)															       MDBTools(1)

NAME

       mdb-ver - Return the format of a given MDB database.

SYNOPSIS

       mdb-ver database
       mdb-ver -M

DESCRIPTION

       mdb-ver is a utility program distributed with MDB Tools.

       It  will  return  a  single  line of output with either 'JET3' for those files produced in Access 97 format or 'JET4' for those produced by
       Access 2000 and XP.

OPTIONS

       -M     Prints the version of MDB Tools itself instead of the MDB file.

NOTES

       Access changed its format between Jet 3 used in Access 97 and Jet 4 used for Access 2000 and XP. The nature of the changes included  moving
       the page size from 2K to 4K and added support for unicode. MDB Tools actively supports both formats.

ENVIRONMENT

       MDB_JET3_CHARSET
	      Defines the charset of the input JET3 (access 97) file. Default is CP1252. See iconv(1).

       MDBICONV
	      Defines the output charset. Default is UTF-8. mdbtools must have been compiled with iconv.

       MDBOPTS
	      semi-column separated list of options:

	      o  use_index

	      o  no_memo

	      o  debug_like

	      o  debug_write

	      o  debug_usage

	      o  debug_ole

	      o  debug_row

	      o  debug_props

	      o  debug_all is a shortcut for all debug_* options

HISTORY

       mdb-ver first appeared in MDB Tools 0.4.

SEE ALSO

       gmdb2(1) mdb-export(1) mdb-hexdump(1) mdb-prop(1) mdb-sql(1) mdb-array(1) mdb-header(1) mdb-parsecsv(1) mdb-schema(1) mdb-tables(1)

AUTHORS

       The mdb-ver utility was written by Brian Bruns.

BUGS

       mdb-ver does minimal checking on the validity of a file. It is possbile for it to misidentify a non-MDB file.

       mdb-ver does not recognize Access 2.0 (Jet 2) or the newer MSDE format files.

0.7								   13 July 2013 						       MDBTools(1)

10 More Discussions You Might Find Interesting

1. Programming

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

Discussion started by: norsk hedensk

2. Programming

Pointer to a struct (with pointers) * glibc detected * double free

Discussion started by: jatoo

3. Programming

solved: glibc detection corruption using a fork in popen

Discussion started by: imrank27

4. Programming

./match_pattern.out: malloc(): memory corruption: 0x0000000013a11600 ***

Discussion started by: shoaibjameel123