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Full Discussion: fwrite throws segmentation fault
Top Forums Programming fwrite throws segmentation fault Post 81921 by fermisoft on Thursday 25th of August 2005 05:28:45 AM
Old 08-25-2005
fwrite throws segmentation fault
Code : function sSaveTFFile
Code:
             .......................
	iRetCode = link (caCurrentFilename, caBackupFilename);
	if (iRetCode == -1)
	{
		ERR_MSG2(LOG_ALERT, "Can't move %s to %s", caCurrentFilename, caBackupFilename);
		return(FAILURE);
	}
	
	iRetCode = unlink (caCurrentFilename);
	if (iRetCode == -1)
	{
		ERR_MSG2(LOG_ALERT, "Can't move %s to %s", caCurrentFilename, caBackupFilename);
		return(FAILURE);
	}


	fpTFFile = fopen (caCurrentFilename, "wb"); 
	if (fpTFFile == NULL)
	{
		ERR_MSG1 (LOG_ALERT, "Can't open %s\n", caCurrentFilename);
		return (FAILURE);
	}

/*
the program crashes here while calling the fwrite function. 
I have verified all the parameters of fwrite. They are valid pointers.  I've also tried putting another fwrite function writing a hard coded value into a file. That function also is crashing.
I've replaced fwrite with fprintf, but still getting the same error.
*/
	if (fwrite (pCurSectData->pucData, sizeof (Uchar_t), pCurSectData->ulDataSize, fpTFFile)
		!= pCurSectData->ulDataSize)
	{
		ERR_MSG1 (LOG_ALERT, "Can't save modified TF data to %s\n", caCurrentFilename);
		return (FAILURE);
	}

             ................................

please find the snapshot of the call stack (while the crash has occurred) in the attachement


Here our function is sSaveTFFile, which calls the fwrite and it is throwing the segmentation fault.

While searching in Google Groups, I found some articles telling the reason to be memory mismanagement. Could any one figure out the exact problem?
fwrite throws segmentation fault-untitledjpg
 

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LEARN ABOUT DEBIAN

net::google::code::atomparser

Net::Google::Code::AtomParser(3pm)			User Contributed Perl Documentation			Net::Google::Code::AtomParser(3pm)

NAME

       Net::Google::Code::AtomParser - AtomParser with a parsing method for gcode

DESCRIPTION

INTERFACE

   new
   parse( $xml_content )
       return( $feed, $entries ), $feed is a hashref like {
	   'title' => 'Issue updates for project net-google-code on Google Code',
	   'id' => 'http://code.google.com/feeds/p/net-google-code/issueupdates/basic',
	   'updated' => '2009-06-12T05:55:48Z' }

       $entries is an arrayref like [
	   {
	       'content' => '<pre>second comment
	</pre>
	',
	       'name'  => 'sunnavy',
	       'title' => 'Update 2 to issue 22 ("for sd test")',
	       'id' => 'http://code.google.com/feeds/p/net-google-code/issueupdates/basic/22/2',
	       'updated' => '2009-06-12T05:55:48Z'
	   },
	   {
	       'content' => '<pre>first comment
	</pre>
	',
	       'name'  => 'sunnavy',
	       'title' => 'Update 1 to issue 22 ("for sd test")',
	       'id' => 'http://code.google.com/feeds/p/net-google-code/issueupdates/basic/22/1',
	       'updated' => '2009-06-12T05:55:22Z'
	   }, ]

AUTHOR

       sunnavy	"<sunnavy@bestpractical.com>"

LICENCE AND COPYRIGHT

       Copyright 2008-2010 Best Practical Solutions.

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

perl v5.10.1							    2010-01-29					Net::Google::Code::AtomParser(3pm)
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