FastMM Memory Error Detected beim Debuggen

[himitsu]

Bei Emba wirst du da nichts finden, denn dort ist eine "andere/spezielle Version" des FastMM integriert, welche nicht über diese INC gesteuert wird. (dort kann man aber über units wie SimpleShareMem sehr einfach vordefinierte Einstellungen für das Sharing nutzen)

Zu ShareMM, ShareMMIfLibrary und AttemptToUseSharedMM sollte was in der INC stehn und früher fand man auch Mal ein paar Infos auf der Webseite von Pierre le Riche, welche FastMM entwickelt hatte.

[TiGü]

Zitat von Aus_der_INC-Datei:

{-----------------------Memory Manager Sharing Options------------------------}

{Allow sharing of the memory manager between a main application and DLLs that
were also compiled with FastMM. This allows you to pass dynamic arrays and
long strings to DLL functions provided both are compiled to use FastMM.
Sharing will only work if the library that is supposed to share the memory
manager was compiled with the "AttemptToUseSharedMM" option set. Note that if
the main application is single threaded and the DLL is multi-threaded that you
have to set the IsMultiThread variable in the main application to true or it
will crash when a thread contention occurs. Note that statically linked DLL
files are initialized before the main application, so the main application may
well end up sharing a statically loaded DLL's memory manager and not the other
way around. }
{.$define ShareMM}

{Allow sharing of the memory manager by a DLL with other DLLs (or the main
application if this is a statically loaded DLL) that were also compiled with
FastMM. Set this option with care in dynamically loaded DLLs, because if the
DLL that is sharing its MM is unloaded and any other DLL is still sharing
the MM then the application will crash. This setting is only relevant for
DLL libraries and requires ShareMM to also be set to have any effect.
Sharing will only work if the library that is supposed to share the memory
manager was compiled with the "AttemptToUseSharedMM" option set. Note that
if DLLs are statically linked then they will be initialized before the main
application and then the DLL will in fact share its MM with the main
application. This option has no effect unless ShareMM is also set.}
{.$define ShareMMIfLibrary}

{Define this to attempt to share the MM of the main application or other loaded
DLLs in the same process that were compiled with ShareMM set. When sharing a
memory manager, memory leaks caused by the sharer will not be freed
automatically. Take into account that statically linked DLLs are initialized
before the main application, so set the sharing options accordingly.}
{.$define AttemptToUseSharedMM}

{Define this to enable backward compatibility for the memory manager sharing
mechanism used by Delphi 2006 and 2007, as well as older FastMM versions.}
{$define EnableBackwardCompatibleMMSharing}

Soweit ich das vorher verstanden hatte, sollte sich diese Option doch nur auswirken, wenn Arrays oder normale Strings übergeben werden (nicht WideString).

In meinen Fall wird jedoch richtigerweise ein Zeiger übergeben.

Ja, selbst wenn man das Beispiel so abändert, dass einfach nur das Formular aufgerufen wird (ohne irgendetwas an die DLL zu übergeben) erhält man ja den Fehler beim Zugriff auf String-Propertys des DLLFrm.

Auch beim Zugriff auf DLLFrm.Caption oder Ähnliches gibt es die gleichen Meldungen.
Debuggen von anderen Datentypen bereiten aber keine Probleme?!?

Die FAQ zu FastMM4 haben mich auch nicht schlauer gemacht.