Memory Leak on creating threads

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   CJ: v22.0.0VisualStudio: 2022 (17.11.5)
Windows: 11

I am creating numerous worker threads using _beginthreadex and terminating them with _endthreadex(0) and CloseHandle().

When taking a memory snapshot in Visual Studio, a memory leak of 480 bytes per thread occurs at 
MyApp.exe!_AFX_THREAD_STATE.

The call stack is as follows, confirming that the memory was allocated by the Toolkit during thread creation: 
kernel32.dll!0x7ff96021257d() 
MyApp.exe!CXTPSkinManagerDetoursApiHook::ThreadProcHook() - Line 591 
MyApp.exe!AfxGetModuleState() - Line 314 
MyApp.exe!CThreadLocal<_AFX_THREAD_STATE>CreateObject() - Line 200 
MyApp.exe!CThreadLocalObjectGetData() - Line 453 
MyApp.exe!CThreadLocal<_AFX_THREAD_STATE>::GetData() - Line 179 
MyApp.exe!CThreadLocal<_AFX_THREAD_STATE>::operator _AFX_THREAD_STATE *() - Line 191

It seems that using AfxBeginThread instead of _beginthreadex can avoid this issue

My application creates and deletes a very large number of threads, so I cannot overlook this small memory leak. 
Additionally, the libraries my application depends on also seem to create threads, making it impossible to replace all thread creation with AfxBeginThread.

Is there any workaround for this issue?

Regars,
Shinya

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Kudo Shinya Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 November 2024 Status: Offline Points: 3	Post Options Post Reply Quote Kudo Shinya Report Post Thanks(0) Quote Reply Topic: Memory Leak on creating threads Posted: 11 November 2024 at 2:11am
	CJ: v22.0.0 VisualStudio: 2022 (17.11.5) Windows: 11 I am creating numerous worker threads using _beginthreadex and terminating them with _endthreadex(0) and CloseHandle(). When taking a memory snapshot in Visual Studio, a memory leak of 480 bytes per thread occurs at MyApp.exe!_AFX_THREAD_STATE. The call stack is as follows, confirming that the memory was allocated by the Toolkit during thread creation: kernel32.dll!0x7ff96021257d() MyApp.exe!CXTPSkinManagerDetoursApiHook::ThreadProcHook() - Line 591 MyApp.exe!AfxGetModuleState() - Line 314 MyApp.exe!CThreadLocal<_AFX_THREAD_STATE>CreateObject() - Line 200 MyApp.exe!CThreadLocalObjectGetData() - Line 453 MyApp.exe!CThreadLocal<_AFX_THREAD_STATE>::GetData() - Line 179 MyApp.exe!CThreadLocal<_AFX_THREAD_STATE>::operator _AFX_THREAD_STATE *() - Line 191 It seems that using AfxBeginThread instead of _beginthreadex can avoid this issue My application creates and deletes a very large number of threads, so I cannot overlook this small memory leak. Additionally, the libraries my application depends on also seem to create threads, making it impossible to replace all thread creation with AfxBeginThread. Is there any workaround for this issue? Regars, Shinya

agontarenko Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 25 March 2016 Status: Offline Points: 299	Post Options Post Reply Quote agontarenko Report Post Thanks(0) Quote Reply Posted: 14 November 2024 at 2:45am
	Hello Shinya, Unfortunately it is not clear what exactly is going wrong. Can you please provide more detailed information. If it cannot be re-produced in any of our sample applications provided I would appreciate you sending a sample application so that we could debug it. Regards, Artem Gontarenko

Kudo Shinya Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 November 2024 Status: Offline Points: 3	Post Options Post Reply Quote Kudo Shinya Report Post Thanks(0) Quote Reply Posted: 14 November 2024 at 4:07am
	Thank you for your response. After further investigation, I was able to resolve the issue myself. The memory leak occurs not only with _beginthreadex but also with CreateThread. Calling AfxTermThread() at the end of the created thread resolves the memory leak. By calling AfxTermThread() at the end of threads created with _beginthreadex and CreateThread, I was able to solve the problem. Thank you.