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Full Discussion: "GLIBC detected Error" for a simple C code.
Top Forums Programming "GLIBC detected Error" for a simple C code. Post 302524973 by Ranji Raj on Wednesday 25th of May 2011 08:34:42 AM
Old 05-25-2011
"GLIBC detected Error" for a simple C code.
Here is a simple program to find the vowels in the string.
Output is fine.

But I'm getting GLIBC detected as shown below : Smilie

Code:
*** glibc detected *** ./VOWELS: free(): invalid pointer: 0x08b82013 ***
======= Backtrace: =========
/lib/libc.so.6[0x1a86c5]
/lib/libc.so.6(cfree+0x59)[0x1a8b09]
./VOWELS[0x804859d]
/lib/libc.so.6(__libc_start_main+0xdc)[0x154e9c]
./VOWELS[0x80483b1]
======= Memory map: ========
0011b000-00136000 r-xp 00000000 08:03 2913187    /lib/ld-2.5.so
00136000-00137000 r-xp 0001a000 08:03 2913187    /lib/ld-2.5.so
00137000-00138000 rwxp 0001b000 08:03 2913187    /lib/ld-2.5.so
0013f000-00292000 r-xp 00000000 08:03 2913207    /lib/libc-2.5.so
00292000-00294000 r-xp 00153000 08:03 2913207    /lib/libc-2.5.so
00294000-00295000 rwxp 00155000 08:03 2913207    /lib/libc-2.5.so
00295000-00298000 rwxp 00295000 00:00 0 
0054d000-00558000 r-xp 00000000 08:03 2913221    /lib/libgcc_s-4.1.2-20080825.so.1
00558000-00559000 rwxp 0000a000 08:03 2913221    /lib/libgcc_s-4.1.2-20080825.so.1
00bdf000-00be0000 r-xp 00bdf000 00:00 0          [vdso]
08048000-08049000 r-xp 00000000 08:03 1275582    /home/ranjith/Cs/VOWELS
08049000-0804a000 rw-p 00000000 08:03 1275582    /home/ranjith/Cs/VOWELS
08b82000-08ba3000 rw-p 08b82000 00:00 0          [heap]
b7fbf000-b7fc1000 rw-p b7fbf000 00:00 0 
b7fdc000-b7fde000 rw-p b7fdc000 00:00 0 
bff5d000-bff72000 rw-p bffe9000 00:00 0          [stack]
Aborted


CODE:

Code:
int a,e,i,o,u,non;
int main()
{       char *input=(char*)malloc(160);
        printf("Enter a String of any lenngth...\n");
        scanf("%s",input);
        while(*input != '\0'){
                switch(*input)
                {
                        case 'a': a++;break;
                        case 'e': e++;break;
                        case 'i': i++;break;
                        case 'o': o++;break;
                        case 'u': u++;break;
                        default : non++;break;
                }
                input++;
        }
        printf("Vowels list appeared as below:\n");
        printf("\tA\tE\tI\tO\tU\tNON-VOWLES\n");
        printf("%8d%8d%8d%8d%8d%8d\n",a,e,i,o,u,non);
        free(input);    
}

I'm freeing the char pointer well after its use only. Why Am I getting this error(INVALID POINTER). Please let me know.
Last edited by pludi; 05-25-2011 at 10:01 AM..
 

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LEARN ABOUT DEBIAN

tm::coverage

TM::Coverage(3pm)					User Contributed Perl Documentation					 TM::Coverage(3pm)

NAME

       TM::Coverage - Topic Maps, Code Coverage

DESCRIPTION

       This auxiliary package keeps track of the code coverage. Probably quite irrelevant for a user.

       Automatically generated for TM (1.44).

	  ---------------------------- ------ ------ ------ ------ ------ ------ ------
	  File				 stmt	bran   cond    sub    pod   time  total
	  ---------------------------- ------ ------ ------ ------ ------ ------ ------
	  blib/lib/TM.pm		 96.4	84.5   58.0   93.7   90.6   27.5   89.6
	  blib/lib/TM/Analysis.pm	100.0	90.9	n/a  100.0  100.0    0.0   97.5
	  blib/lib/TM/AsTMa/Fact.pm	100.0	 n/a	n/a  100.0    n/a    0.0  100.0
	  blib/lib/TM/AsTMa/Fact2.pm	100.0	 n/a	n/a  100.0    n/a    0.0  100.0
	  blib/lib/TM/Bulk.pm		 76.8	71.4   62.5   85.7  100.0    0.0   75.3
	  blib/lib/TM/CTM/CParser.pm	 65.6	34.3   31.0   84.6    0.0    1.6   52.5
	  blib/lib/TM/CTM/Parser.pm	 90.9	50.0	n/a  100.0    0.0    0.0   79.4
	  blib/lib/TM/DM.pm		100.0	65.0   66.7  100.0    n/a    0.0   96.5
	  blib/lib/TM/Graph.pm		 99.1	88.5	n/a  100.0  100.0    0.0   97.4
	  blib/lib/TM/Index.pm		100.0	80.0   60.0  100.0   83.3    0.3   87.8
	  .../Index/Characteristics.pm	100.0  100.0	n/a  100.0    0.0    0.0   97.0
	  blib/lib/TM/Index/Match.pm	 98.5	87.5	n/a  100.0  100.0    0.5   97.6
	  blib/lib/TM/LTM/CParser.pm	 84.9	45.3   42.7   98.2    0.0    0.2   67.8
	  blib/lib/TM/LTM/Parser.pm	 95.7	62.5   50.0  100.0    0.0    0.0   87.1
	  blib/lib/TM/Literal.pm	 45.8	 0.0   11.8   30.0    0.0    0.4   24.2
	  blib/lib/TM/MapSphere.pm	 96.5	84.6   68.8  100.0  100.0    0.0   91.7
	  .../TM/Materialized/AsTMa.pm	100.0	 n/a	n/a  100.0    0.0    0.0   95.5
	  ...ib/TM/Materialized/LTM.pm	100.0	 n/a	n/a  100.0    0.0    0.0   95.5
	  .../TM/Materialized/MLDBM.pm	100.0	83.3	n/a  100.0    0.0    0.0   92.6
	  ...b/TM/Materialized/Null.pm	100.0	 n/a	n/a  100.0    n/a    0.0  100.0
	  ...TM/Materialized/Stream.pm	100.0  100.0  100.0  100.0    0.0    0.0   96.0
	  ...ib/TM/Materialized/XTM.pm	100.0	 n/a	n/a  100.0    0.0    0.0   96.7
	  blib/lib/TM/PSI.pm		100.0	 n/a	n/a  100.0    n/a    0.0  100.0
	  blib/lib/TM/QL.pm		 91.4	61.5   66.7  100.0   50.0    0.1   83.9
	  blib/lib/TM/QL/CParser.pm	 76.2	42.4   41.9   90.3    0.0    9.1   62.0
	  blib/lib/TM/QL/PE.pm		 83.8	77.3   80.0   91.7    0.0   52.5   80.5
	  blib/lib/TM/QL/TS.pm		 65.2	35.4   27.8   70.8   53.3    2.4   56.9
	  blib/lib/TM/ResourceAble.pm	 88.1	87.5	n/a  100.0  100.0    0.0   90.0
	  .../TM/ResourceAble/MLDBM.pm	100.0	75.0	n/a  100.0    0.0    0.0   94.2
	  blib/lib/TM/Serializable.pm	 94.9	65.6  100.0  100.0  100.0    0.0   84.1
	  .../TM/Serializable/AsTMa.pm	 99.1	87.9   66.7  100.0  100.0    0.0   94.2
	  ...TM/Serializable/Dumper.pm	100.0	 n/a	n/a  100.0    0.0    0.0   93.5
	  ...ib/TM/Serializable/LTM.pm	 94.1	 n/a	n/a   83.3  100.0    0.0   92.0
	  ...ib/TM/Serializable/XTM.pm	 96.3	85.2   72.9  100.0  100.0    0.2   91.5
	  .../lib/TM/Synchronizable.pm	100.0	75.0  100.0  100.0  100.0    0.0   97.2
	  ...M/Synchronizable/MLDBM.pm	100.0	50.0	n/a  100.0    0.0    0.0   89.3
	  ...nchronizable/MapSphere.pm	100.0	63.6   64.3  100.0  100.0    0.0   88.6
	  ...TM/Synchronizable/Null.pm	100.0	 n/a	n/a  100.0    0.0    0.0   87.5
	  blib/lib/TM/Tau.pm		100.0	91.7   80.0  100.0    0.0    0.0   95.6
	  blib/lib/TM/Tau/Federate.pm	 63.2	39.3	n/a   62.5   27.3    0.0   54.5
	  blib/lib/TM/Tau/Filter.pm	100.0	91.7   66.7  100.0   50.0    0.0   90.0
	  .../TM/Tau/Filter/Analyze.pm	100.0	 n/a	n/a  100.0  100.0    0.0  100.0
	  blib/lib/TM/Tree.pm		100.0	57.1   44.4  100.0   66.7    0.0   88.0
	  blib/lib/TM/Utils.pm		100.0	50.0	n/a  100.0    0.0    0.0   89.3
	  ...ib/TM/Utils/TreeWalker.pm	100.0  100.0	n/a  100.0    0.0    0.0   96.0
	  ...ib/TM/Workbench/Plugin.pm	100.0	 n/a	n/a  100.0    0.0    0.0   75.0
	  ...M/Workbench/Plugin/Tau.pm	 87.5	50.0	n/a   80.0    0.0    0.0   73.1
	  yapp/astma-fact.yp		 96.9	91.5   73.3   97.8    0.0    4.8   92.7
	  yapp/astma2-fact.yp		 97.4	91.6   58.3  100.0    0.0    0.2   91.6
	  Total 			 76.8	45.2   40.2   91.2   57.0  100.0   63.8
	  ---------------------------- ------ ------ ------ ------ ------ ------ ------

SEE ALSO

       TM

COPYRIGHT AND LICENSE

       Copyright 200[8] by Robert Barta, <drrho@cpan.org>

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.10.1							    2008-10-05							 TM::Coverage(3pm)
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