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Problem with UPP_HEAP and multithread [message #23304]

Thu, 08 October 2009 10:58

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

I have serious problem with Upp memory allocation in multithreads. This problem dissapear if I don't use UPP_HEAP.

If I allocate, reallocate and free memory in different thread, I have strange bugs. If I force Defs.h "flagUSEMALLOC" problem doesn't occure. I think this is some kind of bug with heap monitor.

The simples example to reproduce this bug attached in file test.cpp (with option MT)

If I call th0(1) programm works fine.
But if argument th0(2) or more it will stop debugger in various places with out visible reason.
In real programm it cause unhandled exception when gui terminates or even fail on vector<>.clear inside GUI thread o_0.

hz1.png -- dubugger stop in unknown place without visible reason. (test.cpp)
hz2.png -- screen shot from other program when this problem occure. (real project) I have exceptions from delete operator. Usually from vector<>.clear(). Exception may occure on different delete operators. And behaviour is very unstable.

Upp version: SVN.643

Attachment: test.cpp
(Size: 0.87KB, Downloaded 372 times)
Attachment: hz1.PNG
(Size: 68.32KB, Downloaded 436 times)
Attachment: hz2.PNG
(Size: 48.24KB, Downloaded 462 times)

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Re: Problem with UPP_HEAP and multithread [message #23305 is a reply to message #23304]

Thu, 08 October 2009 11:00

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

Sorry wrong tesp.cpp

Attachment: test1.cpp
(Size: 1.17KB, Downloaded 373 times)

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Re: Problem with UPP_HEAP and multithread [message #23306 is a reply to message #23305]

Thu, 08 October 2009 11:39

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

Please, compiler version...

And you DO have MT flag in main config, rigth?

Mirek

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Re: Problem with UPP_HEAP and multithread [message #23307 is a reply to message #23304]

Thu, 08 October 2009 11:39

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

kov_serg wrote on Thu, 08 October 2009 04:58

Upp version: SVN.643

Ehm, could you try something more recent? Smile

Mirek

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Re: Problem with UPP_HEAP and multithread [message #23308 is a reply to message #23307]

Thu, 08 October 2009 11:47

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

Tried with MSC9 and MSC71, no crash Sad

BTW, using beginthreadx has a problem with UPP_HEAP -> there is per-thread heap cache that needs to be freed at the and of thread, which is not possible to implement automagically with beginthreadx.

Use Thread class instead. (Or, if you insist, call MemoryFreeThread at the end of thread).

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Re: Problem with UPP_HEAP and multithread [message #23309 is a reply to message #23304]

Thu, 08 October 2009 12:02

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

OS: WindowsXP SP3 32bit
Compiler: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.762 for 80x86

I release 1607 the situation is the same.
??? In designer ancors don't work any more while resize. Why?
They work in SVN.643

Thanks luzr.
But MemoryFreeThread not defined in all versions of build

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Re: Problem with UPP_HEAP and multithread [message #23310 is a reply to message #23304]

Thu, 08 October 2009 12:06

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

With MemoryFreeThread works perfect. Thanks!

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Re: Problem with UPP_HEAP and multithread [message #23311 is a reply to message #23309]

Thu, 08 October 2009 12:25

mrjt
Messages: 705
Registered: March 2007
Location: London

Contributor

kov_serg wrote on Thu, 08 October 2009 11:02

??? In designer ancors don't work any more while resize. Why?
They work in SVN.643

There's a new button up at the top (next the grid and red 'ignore min size' buttons) that disables springs.

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Re: Problem with UPP_HEAP and multithread [message #23312 is a reply to message #23310]

Thu, 08 October 2009 12:53

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

kov_serg wrote on Thu, 08 October 2009 06:06

With MemoryFreeThread works perfect. Thanks!

That is quite weird and very likely just accidental.

Omitting MemoryFreeThread just avoids ugly silent memory leak, but should not affect the stability.

-> I recommend more testing.

Mirek

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Re: Problem with UPP_HEAP and multithread [message #23313 is a reply to message #23312]

Thu, 08 October 2009 12:57

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

BTW, are you 100% sure that printf is reentrant/MT safe?

Maybe you can try just to add mutex for printf...

Mirek

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Re: Problem with UPP_HEAP and multithread [message #23333 is a reply to message #23313]

Sun, 11 October 2009 10:31

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

Here is printf and Sleep only for simplicity. In real code there is no printf at all. Just operations with array mutex and events. And if UPP_HEAP disabled program working stable. This is indeed overloaded new and delete operators comes into play. In case then MemoryFreeThread called before thread end it works fine, but without it it begins falling into a parts after second thread creation.

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