Re: [xml] Memory error.

["William M. Brack" <wbrack mmm com hk>]

William M. Brack said:
> Тюшин Вадим \(forsys\) said:
>> Greeting.
>>
>> I have found a memory trouble while parsing xml document in a BIG
>> cycle.
>> Please, try to compile and run the attached program setting
>> different cycle values.
>> The more value will be set to the cycle counter, the more memory
>> will be eaten away by this program.
>> By the way: under HP-UX setting cycle counter to 100000 or higher
>> will cause program to fall into 'core dump'.
>>
>> Problem was found under version 2.6.2. I tryed 2.6.5 - problem
>> exists.
>> By the way: under version 2.5.6 this bug does not exist.
>>
>> With respect. Tyushin Vadim
>> tva forsys ru
>
> I compiled your program on my AMD MP2000+ system and ran it with the
> libxml2 "memcheck" feature, as well as under the memory checking
> program "valgrind".  There are *no* memory leaks (except for the
> allocation of an encoding handler, which would be released if
> xmlCleanupParser were called), including setting the cycle count up
> to 1,000,000.  Unfortunately, it's getting past my bedtime now, but
> tomorrow I will port everything over to my testing account on an
> HP-UX system and see if I can uncover anything there.

I uploaded the released version 2.6.5 of libxml2 library together
with your program onto an HP system.  Unfortunately the iconv
library on that system had some problems, so I needed to remove the
encoding declaration from your program.  There were no problems,
including a run of 5,000,000 cycles.  System info:

wbrack spe176 work $ uname -a
HP-UX spe176 B.11.23 U ia64 1437274693 unlimited-user license
wbrack spe176 work $ gcc -v
Reading specs from /usr/local/lib/gcc-lib/ia64-hp-hpux11.23/3.3.2/specs
Configured with:
/scratch/zack/gcc/pkg/3.3.1/hpux-11/gcc-3.3.2/configure
--enable-languages=c,c++ --enable-threads=posix --with-gnu-as
--without-gnu-ld --with-as=/usr/local/bin/as --prefix=/usr/local
Thread model: posix
gcc version 3.3.2

Program run:
wbrack spe176 work $ ./test_libxml 5000000
Message (length 70):
<?xml version="1.0"?>
<ftvml version="1.2" command_id="1201">
</ftvml>

imax = 5000000
Press <Enter> to exit.

"Top" info at end of run:
CPU USERNAME PRI NI   SIZE    RES TIME %WCPU  %CPU COMMAND
 0  wbrack   154 20  7372K   488K 1:47 57.12 56.97 test_lib