Madexception reported threadhandle leak in DUI70.dll

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advwang
Posts: 11
Joined: Fri Mar 15, 2019 4:48 am

Madexception reported threadhandle leak in DUI70.dll

Post by advwang »

Create a form, put a TEdit in form, run and focus to this edit, exit, then mad reported threadhandle leak in DUI70.dll
From the call stack point of view, it is the input method (I use the Asian Unicode environment) that loads dui70
I think mad has detected the creation, but the thread handle release is after mad exits, so mad has not caught the release, so report the leak


thread $1b74:
671a9f4a madExcept32.dll madExceptDbg 4052 CreateThreadCallback
004a7723 Test44Prj.exe madExcept 17661 HookedCreateThread
77416d0f msvcrt.dll _beginthreadex
5c25b730 DUser.dll InitGadgets
5c31d70d DUI70.dll InitThread
77a26357 KERNEL32.DLL BaseThreadInitThunk

:5c329ca0 ; C:\WINDOWS\SysWOW64\DUI70.dll
:77bf5608 ntdll.RtlGetNtSystemRoot + 0x68
:77c03f7f ;
:77c04826 ;
:77c0483d ;
:77c14164 ;
:77bf508c ;
:77c04e8c ;
:77c04db3 ntdll.LdrLoadDll + 0x93
:6719d87c ; C:\madExcept\madExcept32.dll
:71ab1000
:76e58752 ; C:\WINDOWS\SysWOW64\combase.dll
:76e586db ; C:\WINDOWS\SysWOW64\combase.dll
:76e584ef ; C:\WINDOWS\SysWOW64\combase.dll
:76e5b620 ; C:\WINDOWS\SysWOW64\combase.dll
:76e181bc ; C:\WINDOWS\SysWOW64\combase.dll
:76e5a694 ; C:\WINDOWS\SysWOW64\combase.dll
:76e58e92 ; C:\WINDOWS\SysWOW64\combase.dll
:76e4f545 ; C:\WINDOWS\SysWOW64\combase.dll
:76e58a8e ; C:\WINDOWS\SysWOW64\combase.dll
:76e5afda ; C:\WINDOWS\SysWOW64\combase.dll
:76e851c5 ; C:\WINDOWS\SysWOW64\combase.dll
:76e8507d ; C:\WINDOWS\SysWOW64\combase.dll
:76e85001 ; C:\WINDOWS\SysWOW64\combase.dll
:76e4f50d ; C:\WINDOWS\SysWOW64\combase.dll
:76e4f64d ; C:\WINDOWS\SysWOW64\combase.dll
:76e4f514 ; C:\WINDOWS\SysWOW64\combase.dll
:76e1a7e7 ; C:\WINDOWS\SysWOW64\combase.dll
:76e19c15 ; C:\WINDOWS\SysWOW64\combase.dll
:76e19a3e combase.CoCreateInstance + 0xbe
:7778cb29 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777ea940 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777ef19f ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777ee4cb ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777ea0b8 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777aa04f ; C:\WINDOWS\SysWOW64\MSCTF.dll
:7776bc7f ; C:\WINDOWS\SysWOW64\MSCTF.dll
:7778ec5b ; C:\WINDOWS\SysWOW64\MSCTF.dll
:7776a4a8 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:7776a215 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:7776a1a1 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:77769e91 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:7776905d ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777f0d23 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777ef291 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777a98b4 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:77767c3a ; C:\WINDOWS\SysWOW64\MSCTF.dll
:7780327a ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777c680f ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777ba861 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777d86bf ; C:\WINDOWS\SysWOW64\MSCTF.dll
:7777e574 ; C:\WINDOWS\SysWOW64\MSCTF.dll
:777a24fb ; C:\WINDOWS\SysWOW64\MSCTF.dll
:778b444b USER32.AddClipboardFormatListener + 0x4b
:77894f8c ; C:\WINDOWS\SysWOW64\USER32.dll
:778940de ; C:\WINDOWS\SysWOW64\USER32.dll
:77893ec0 USER32.DispatchMessageW + 0x10
Vcl.Forms.TApplication.ProcessMessage(???)
madshi
Site Admin
Posts: 10528
Joined: Sun Mar 21, 2004 5:25 pm

Re: Madexception reported threadhandle leak in DUI70.dll

Post by madshi »

Are you 100% sure that the thread handle is freed at all?

madExcept's leak reporting is run after all your unit finalization sections have run through. So I don't see how the thread handle would still be released after the leak reporting.
advwang
Posts: 11
Joined: Fri Mar 15, 2019 4:48 am

Re: Madexception reported threadhandle leak in DUI70.dll

Post by advwang »

DUI70.dll is Windows's dll used by IME, So the thread hanle shuold be released after my app exit.
The question is how not to display this information belong to system control.
madshi
Site Admin
Posts: 10528
Joined: Sun Mar 21, 2004 5:25 pm

Re: Madexception reported threadhandle leak in DUI70.dll

Post by madshi »

If you're sure that this is not a leak, you can try if this works?

HideLeak('_beginthreadex|InitGadgets');
advwang
Posts: 11
Joined: Fri Mar 15, 2019 4:48 am

Re: Madexception reported threadhandle leak in DUI70.dll

Post by advwang »

I Add HideLeak in program begin and end, no effect

begin
HideLeak('_beginthreadex|InitGadgets');
Application.Initialize;
Application.MainFormOnTaskbar := True;
Application.CreateForm(TForm1, Form1);
Application.Run;
HideLeak('_beginthreadex|InitGadgets');
end.
advwang
Posts: 11
Joined: Fri Mar 15, 2019 4:48 am

Re: Madexception reported threadhandle leak in DUI70.dll

Post by advwang »

I found the problem and sent a post independently

viewtopic.php?f=11&t=28814

With this post modification, hideleak ('| beginthreadex| initgadgets') works
madshi
Site Admin
Posts: 10528
Joined: Sun Mar 21, 2004 5:25 pm

Re: Madexception reported threadhandle leak in DUI70.dll

Post by madshi »

Great, thanks! :D
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