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Memoryleak detection using MALLOCDEBUG

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Operating Systems AIX Memoryleak detection using MALLOCDEBUG
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Old 03-30-2008
Memoryleak detection using MALLOCDEBUG
This topic could also fit into the High Level Programming Forum, but i post it here since its very AIX specific.
I am trying to isolate and resolve memory leaks and -corruption using AIX's MALLOCDEBUG environment variables.
Isolate and resolve memory leaks using MALLOCDEBUG on AIX Version 5.3

This works fine when using a small test application. But when using it with with our more complex application it crashes with signal 4 when starting up and no error message is printed to the mallocdebug logfile.

I wonder if anyone has been using this feature with a 'real' application with success.

And i wonder if there are any alternatives for searching memory leaks / memory corruption within a c programm.

- AIX MALLOCDEBUG
- Purify (only works with a specifig gcc version)
- ZeroFault (commercial didnt try it yet)
- libraries like EFence (needs recompilation of the complete source (which sucks))
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LEARN ABOUT PHP

mb_detect_order

MB_DETECT_ORDER(3)							 1							MB_DETECT_ORDER(3)

mb_detect_order - Set/Get character encoding detection order

SYNOPSIS

       mixed mb_detect_order ([mixed  $encoding_list = mb_detect_order()])

DESCRIPTION

	Sets the automatic character encoding detection order to $encoding_list.

PARAMETERS

	      o $encoding_list
		-$encoding_list is an array or comma separated list of character encoding. See supported encodings.  If $encoding_list is omitted,
		it  returns  the  current  character  encoding	detection  order  as  array.   This  setting  affects  mb_detect_encoding(3)   and
		mb_send_mail(3).  mbstring currently implements the following encoding detection filters. If there is an invalid byte sequence for
		the following encodings, encoding detection will fail.	UTF-8, UTF-7, ASCII, EUC-JP, SJIS, eucJP-win, SJIS-win,  JIS,  ISO-2022-JP
		For ISO-8859-*, mbstring always detects as ISO-8859-*.	For UTF-16, UTF-32, UCS2 and UCS4, encoding detection will fail always.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      mb_detect_order(3) examples

	      <?php
	      /* Set detection order by enumerated list */
	      mb_detect_order("eucjp-win,sjis-win,UTF-8");

	      /* Set detection order by array */
	      $ary[] = "ASCII";
	      $ary[] = "JIS";
	      $ary[] = "EUC-JP";
	      mb_detect_order($ary);

	      /* Display current detection order */
	      echo implode(", ", mb_detect_order());
	      ?>

       Example #2

	      Example showing useless detect orders

	      ; Always detect as ISO-8859-1
	      detect_order = ISO-8859-1, UTF-8

	      ; Always detect as UTF-8, since ASCII/UTF-7 values are
	      ; valid for UTF-8
	      detect_order = UTF-8, ASCII, UTF-7

SEE ALSO

       mb_internal_encoding(3), mb_http_input(3), mb_http_output(3), mb_send_mail(3).

PHP Documentation Group 													MB_DETECT_ORDER(3)