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Bug #44875 Memory leak in addcslashes
Submitted: 2008-04-30 20:10 UTC Modified: 2008-05-01 03:07 UTC
From: hrichter at udec dot cl Assigned:
Status: Not a bug Package: Strings related
PHP Version: 5.2.5 OS: Linux 2.6.9-5.EL
Private report: No CVE-ID: None
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 [2008-04-30 20:10 UTC] hrichter at udec dot cl 
Description:
------------
The function addcslashes doesn't free memory when its first argument is longer than 4


CONFIGURE LINE:
./configure --prefix=/opt/lampp --with-apxs2=/opt/lampp/bin/apxs --with-config-file-path=/opt/lampp/etc --with-mysql=/opt/lampp --enable-inline-optimization --disable-debug --enable-bcmath --enable-calendar --enable-ctype --enable-dbase --enable-discard-path --enable-exif --enable-filepro --enable-force-cgi-redirect --enable-ftp --enable-gd-imgstrttf --enable-gd-native-ttf --with-ttf --enable-magic-quotes --enable-memory-limit --enable-shmop --enable-sigchild --enable-sysvsem --enable-sysvshm --enable-track-vars --enable-trans-sid --enable-wddx --enable-yp --with-ftp --with-gdbm=/opt/lampp --with-jpeg-dir=/opt/lampp --with-png-dir=/opt/lampp --with-freetype-dir=/opt/lampp --without-xpm --with-zlib=yes --with-zlib-dir=/opt/lampp --with-openssl=/opt/lampp --with-expat-dir=/opt/lampp --enable-xslt=/opt/lampp --with-xsl=/opt/lampp --with-dom=/opt/lampp --with-ldap=/opt/lampp --with-ncurses=/opt/lampp --with-gd --with-imap-dir=/opt/lampp --with-imap-ssl --with-imap=/opt/lampp --with-gettext=/opt/lampp --with-mssql=/opt/lampp --with-sybase=/opt/lampp --with-interbase=shared,/opt/interbase --with-mysql-sock=/opt/lampp/var/mysql/mysql.sock --with-oci8=shared,instantclient,/opt/lampp/lib/instantclient --with-mcrypt=/opt/lampp --with-mhash=/opt/lampp --enable-sockets --enable-mbstring=all --with-curl=/opt/lampp --enable-mbregex --enable-zend-multibyte --enable-exif --with-bz2=/opt/lampp --with-sqlite=shared,/opt/lampp --with-libxml-dir=/opt/lampp --enable-soap --enable-pcntl --with-mysqli=/opt/lampp/bin/mysql_config --with-mime-magic --with-pgsql=shared,/opt/lampp/postgresql --with-iconv --enable-dio --with-pdo-mysql=/opt/lampp --with-pdo-pgsql=/opt/lampp/postgresql --with-pdo-sqlite --with-ming=shared,/opt/lampp

Reproduce code:
---------------
for($i=0 ; $i<5000 ; ++$i){
	addcslashes("12345","'") ;
	echo memory_get_usage(),"<br>\n" ;
}


Expected result:
----------------
The memory usage should be the same in every iteration.

Actual result:
--------------
The memory usage keeps growing and growing up to a certain maximum which depends on the length of the first argument of addcslashes.

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 [2008-05-01 02:38 UTC] felipe@php.net 
There is no mem. leak.

Says the documentation:

int memory_get_usage ([ bool $real_usage ] )

real_usage -- Set this to TRUE to get the real size of memory allocated from system. If not set or FALSE only the memory used by emalloc() is reported.

Using that parameter you will see what you expect.
 
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