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Top Forums Programming *** glibc detected *** ./a.out: malloc(): memory corruption (fast): Post 302600219 by exgenome on Monday 20th of February 2012 11:38:30 AM
Old 02-20-2012
*** 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 *)malloc(sizeof(SNODE));
08 var->next=start;
09 start=var;
10 var->info=ptr;
11 }//end if
12}//end ins()




error :

*** glibc detected *** ./a.out: malloc(): memory corruption (fast): 0x08bde038 ***
======= Backtrace: =========
/lib/i386-linux-gnu/libc.so.6(+0x6ebc2)[0xb76a7bc2]
/lib/i386-linux-gnu/libc.so.6(+0x70cf3)[0xb76a9cf3]
/lib/i386-linux-gnu/libc.so.6(__libc_calloc+0xae)[0xb76ac4ce]
./a.out[0x80485f9]
./a.out[0x8048985]
./a.out[0x8048ce4]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0xb7652113]
./a.out[0x80484c1]
======= Memory map: ========
08048000-0804a000 r-xp 00000000 08:01 117539 /home/utkarsh/Desktop/c-code/Data_structures/trees/a.out
0804a000-0804b000 r--p 00001000 08:01 117539 /home/utkarsh/Desktop/c-code/Data_structures/trees/a.out
0804b000-0804c000 rw-p 00002000 08:01 117539 /home/utkarsh/Desktop/c-code/Data_structures/trees/a.out
08bde000-08bff000 rw-p 00000000 00:00 0 [heap]
b7500000-b7521000 rw-p 00000000 00:00 0
b7521000-b7600000 ---p 00000000 00:00 0
b7605000-b7621000 r-xp 00000000 08:01 94286 /lib/i386-linux-gnu/libgcc_s.so.1
b7621000-b7622000 r--p 0001b000 08:01 94286 /lib/i386-linux-gnu/libgcc_s.so.1
b7622000-b7623000 rw-p 0001c000 08:01 94286 /lib/i386-linux-gnu/libgcc_s.so.1
b7638000-b7639000 rw-p 00000000 00:00 0
b7639000-b77af000 r-xp 00000000 08:01 94290 /lib/i386-linux-gnu/libc-2.13.so
b77af000-b77b1000 r--p 00176000 08:01 94290 /lib/i386-linux-gnu/libc-2.13.so
b77b1000-b77b2000 rw-p 00178000 08:01 94290 /lib/i386-linux-gnu/libc-2.13.so
b77b2000-b77b5000 rw-p 00000000 00:00 0
b77c8000-b77cc000 rw-p 00000000 00:00 0
b77cc000-b77cd000 r-xp 00000000 00:00 0 [vdso]
b77cd000-b77eb000 r-xp 00000000 08:01 94287 /lib/i386-linux-gnu/ld-2.13.so
b77eb000-b77ec000 r--p 0001d000 08:01 94287 /lib/i386-linux-gnu/ld-2.13.so
b77ec000-b77ed000 rw-p 0001e000 08:01 94287 /lib/i386-linux-gnu/ld-2.13.so
bfd86000-bfda7000 rw-p 00000000 00:00 0 [stack]
Aborted

pls guys tell me exactly what happend and what does the error massage means and also a solution pls.

thanks!!

Last edited by exgenome; 02-20-2012 at 01:02 PM..
 

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PMINST(1p)						User Contributed Perl Documentation						PMINST(1p)

NAME
pminst - find modules whose names match this pattern SYNOPSIS
pminst [-s] [-l] [pattern] DESCRIPTION
Without argumnets, show the names of all installed modules. Given a pattern, show all module names that match it. The -l flag will show the full pathname. The -s flag will separate the base directory from @INC from the module portion itself. EXAMPLES
$ pminst (lists all installed modules) $ pminst Carp CGI::Carp Carp $ pminst ^IO:: IO::Socket::INET IO::Socket::UNIX IO::Select IO::Socket IO::Poll IO::Handle IO::Pipe IO::Seekable IO::Dir IO::File $ pminst '(?i)io' IO::Socket::INET IO::Socket::UNIX IO::Select IO::Socket IO::Poll IO::Handle IO::Pipe IO::Seekable IO::Dir IO::File IO Pod::Functions The -s flag provides output with the directory separated by a space: $ pminst -s | sort +1 (lists all modules, sorted by name, but with where they came from) $ oldperl -S pminst -s IO /usr/lib/perl5/i386-linux/5.00404 IO::File /usr/lib/perl5/i386-linux/5.00404 IO::Handle /usr/lib/perl5/i386-linux/5.00404 IO::Pipe /usr/lib/perl5/i386-linux/5.00404 IO::Seekable /usr/lib/perl5/i386-linux/5.00404 IO::Select /usr/lib/perl5/i386-linux/5.00404 IO::Socket /usr/lib/perl5/i386-linux/5.00404 IO /usr/lib/perl5/site_perl LWP::IO /usr/lib/perl5/site_perl LWP::TkIO /usr/lib/perl5/site_perl Tk::HTML::IO /usr/lib/perl5/site_perl Tk::IO /usr/lib/perl5/site_perl IO::Stringy /usr/lib/perl5/site_perl IO::Wrap /usr/lib/perl5/site_perl IO::ScalarArray /usr/lib/perl5/site_perl IO::Scalar /usr/lib/perl5/site_perl IO::Lines /usr/lib/perl5/site_perl IO::WrapTie /usr/lib/perl5/site_perl IO::AtomicFile The -l flag gives full paths: $ filsperl -S pminst -l Thread /usr/local/filsperl/lib/5.00554/i686-linux-thread/Thread/Queue.pm /usr/local/filsperl/lib/5.00554/i686-linux-thread/Thread/Semaphore.pm /usr/local/filsperl/lib/5.00554/i686-linux-thread/Thread/Signal.pm /usr/local/filsperl/lib/5.00554/i686-linux-thread/Thread/Specific.pm /usr/local/filsperl/lib/5.00554/i686-linux-thread/Thread.pm AUTHORS and COPYRIGHTS Copyright (C) 1999 Tom Christiansen. Copyright (C) 2006-2008 Mark Leighton Fisher. This is free software; you can redistribute it and/or modify it under the terms of either: (a) the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version, or (b) the Perl "Artistic License". (This is the Perl 5 licensing scheme.) Please note this is a change from the original pmtools-1.00 (still available on CPAN), as pmtools-1.00 were licensed only under the Perl "Artistic License". perl v5.10.1 2010-02-22 PMINST(1p)
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