Demonstration of memory leak in Clarion CPXML procedure - PTSS#40365

brahn · December 23, 2015, 8:58pm

In case you are curious:
http://problemtracker.softvelocity.com/clarion8/UpdtCustBugsview.php?ID1=40365

CPXML appears to have a memory leak in the toDOM:AppendCol procedure. Below is a program that demonstrates this.

Calling GroupToDom with the default for DOMStyle appears to be fine (no memory leak):

Doc &= GroupToDOM(myGroup, 'root', 'label')

However, when you change the DOMStyle you very quickly see the memory usage spike:

Doc &= GroupToDOM(myGroup, 'root', 'label', DOMStyle:ADO_NET)

Example program:

gist.github.com

https://gist.github.com/fushnisoft/74f5ff65c2e9cb1e1551

PTSS40365.clw

  PROGRAM

  MAP
  END
  
  Include('cpxml.inc'),ONCE
  Include('xmlclass.inc'),ONCE

myGroup   GROUP
someField   CSTRING(255)

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PTSS40365.cwproj

<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <ProjectGuid>{E3AA0E6D-DED3-4252-8344-955DE913709B}</ProjectGuid>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">Win32</Platform>
    <OutputType>Exe</OutputType>
    <RootNamespace>PTSS40365</RootNamespace>
    <AssemblyName>PTSS40365</AssemblyName>
    <OutputName>PTSS40365</OutputName>
    <stack_size>16384</stack_size>

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Possible fix:

gist.github.com

https://gist.github.com/fushnisoft/66cbf633609ddf46376a

cpxml.clw

toDOM:AppendCol procedure(*XMLExchange exch, *Document doc, *Element rowE, StructWrapper sw, signed col, DOMStyle style)

colE      &Element, auto
colA      &Attr, auto
cs        CStringClass
value     CStringClass
fldFormat XMLFieldFormat
tp                UNSIGNED  
T                 &Text, auto
CData             &CDATASection

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