Memory leak of managed IE toolbar ?

Question

I found a memory leak of System.Windows.Forms.Application+ThreadContext when IE loaded managed toolbar.

Each time i open a new tab, the ThreadContext will be constructed. but after I close  the new tab, the ThreadContext won't be detroyed.

It seems that a static Hashtable keeps the instance of the ThreadConext. It won't be removed from the hashtable.

the following is the gcroot command result in windbg:

0:015> !gcroot 03e23954
Scan Thread 6 OSTHread 1e84
Scan Thread 8 OSTHread 1860
Scan Thread 9 OSTHread 1ea8
DOMAIN(0019B640):HANDLE(Pinned):3cb13ec:Root:04e13250(System.Object[])->
03e13108(System.Collections.Hashtable)->
03e13140(System.Collections.Hashtable+bucket[])->
03e131dc(System.Windows.Forms.Application+ThreadContext)

How could I remove this leak?

Thanks,

Calvin

Answer 1

Hi Calvin,

I would suggest you to create control in the main window thread, not a non-UI thread. You can check this link:

http://social.msdn.microsoft.com/forums/en-US/clr/thread/6a6e6e8b-d024-4d3f-b8c9-f65f5e92fd25

Best regards,
Jesse

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Jesse Jiang [MSFT]
MSDN Community Support | Feedback to us

Answer 2

Hi Jesse,

I never created controls in a non-UI thread. All controls are created in the Tab Window thread. Also, my managed Toolbar was created in the Tab Window thread and created by IE.

Regards,

Calvin