Heap Error
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Hi All, I am running an application which is a form view application.I am allocating memory of size 160kb in a for loop .I am allocating memory at the begining of for loop for each iteration and freeing it at the end of each iteration.I have 133 such iteration.But i am facing a problem.In the 9th iteration when i am trying to allocate a memory using malloc the application crashes. I am getting the following messsage in the output window.
HEAP[TEST.exe]: HEAP: Free Heap block 3f277a8 modified at 3f27850 after it was freed
I am getting the following messages in the call stack window:
ntdll.dll!7c90120e()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
ntdll.dll!7c96e139()
ntdll.dll!7c94b535()
ntdll.dll!7c927573()
ntdll.dll!7c91005d()
ntdll.dll!7c927784()
ntdll.dll!7c927573()TEST.exe!_heap_alloc_base(unsigned int size=160036) Line 105 + 0x28 bytes C
TEST.exe!_heap_alloc_dbg_impl(unsigned int nSize=160000, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 427 + 0x9 bytes C++
TEST.exe!_nh_malloc_dbg_impl(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 239 + 0x19 bytes C++
TEST.exe!_nh_malloc_dbg(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0) Line 296 + 0x1d bytes C++
TEST.exe!malloc(unsigned int nSize=160000) Line 56 + 0x15 bytes C++
TEST.exe!TEST_IDP_FUNC1(unsigned char * pucSrcImg=0x07200068, unsigned char * pucDstImg=0x059d4d68, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 529 + 0x11 bytes C
TEST.exe!TEST_IDP_FUNC2(unsigned char * pucSrcImg=0x05aecc58, unsigned char * pucDstImg=0x03f00690, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, unsigned short uiDstRows=400, unsigned short uiDstCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 4117 + 0x1b bytes C
TEST.exe!CTEST::FUNC3(CTESTImage * objSrcImage=0x03e726c8, CTESTImage * objDstnImage=0x03e7a050, unsigned char * pucDstImg=0x03f00690) Line 107 + 0x25 bytes C++
TEST.exe!CTESTView::FUNC4() Line 8346 C++
TEST.exe!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x0039c900, unsigned int nID=32902, int nCode=0, void (void)* pfn=0x00401276, void * pExtra=0x00000000, unsigned int nSig=57, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 82 C++
TEST.exe!CCmdTarget::OnCmdM -
Hi All, I am running an application which is a form view application.I am allocating memory of size 160kb in a for loop .I am allocating memory at the begining of for loop for each iteration and freeing it at the end of each iteration.I have 133 such iteration.But i am facing a problem.In the 9th iteration when i am trying to allocate a memory using malloc the application crashes. I am getting the following messsage in the output window.
HEAP[TEST.exe]: HEAP: Free Heap block 3f277a8 modified at 3f27850 after it was freed
I am getting the following messages in the call stack window:
ntdll.dll!7c90120e()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
ntdll.dll!7c96e139()
ntdll.dll!7c94b535()
ntdll.dll!7c927573()
ntdll.dll!7c91005d()
ntdll.dll!7c927784()
ntdll.dll!7c927573()TEST.exe!_heap_alloc_base(unsigned int size=160036) Line 105 + 0x28 bytes C
TEST.exe!_heap_alloc_dbg_impl(unsigned int nSize=160000, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 427 + 0x9 bytes C++
TEST.exe!_nh_malloc_dbg_impl(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 239 + 0x19 bytes C++
TEST.exe!_nh_malloc_dbg(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0) Line 296 + 0x1d bytes C++
TEST.exe!malloc(unsigned int nSize=160000) Line 56 + 0x15 bytes C++
TEST.exe!TEST_IDP_FUNC1(unsigned char * pucSrcImg=0x07200068, unsigned char * pucDstImg=0x059d4d68, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 529 + 0x11 bytes C
TEST.exe!TEST_IDP_FUNC2(unsigned char * pucSrcImg=0x05aecc58, unsigned char * pucDstImg=0x03f00690, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, unsigned short uiDstRows=400, unsigned short uiDstCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 4117 + 0x1b bytes C
TEST.exe!CTEST::FUNC3(CTESTImage * objSrcImage=0x03e726c8, CTESTImage * objDstnImage=0x03e7a050, unsigned char * pucDstImg=0x03f00690) Line 107 + 0x25 bytes C++
TEST.exe!CTESTView::FUNC4() Line 8346 C++
TEST.exe!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x0039c900, unsigned int nID=32902, int nCode=0, void (void)* pfn=0x00401276, void * pExtra=0x00000000, unsigned int nSig=57, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 82 C++
TEST.exe!CCmdTarget::OnCmdMCode Watson, we need code. :)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles] -
Code Watson, we need code. :)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]Code, plz. Urgent. Doesn't that work? :)
Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]
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Hi All, I am running an application which is a form view application.I am allocating memory of size 160kb in a for loop .I am allocating memory at the begining of for loop for each iteration and freeing it at the end of each iteration.I have 133 such iteration.But i am facing a problem.In the 9th iteration when i am trying to allocate a memory using malloc the application crashes. I am getting the following messsage in the output window.
HEAP[TEST.exe]: HEAP: Free Heap block 3f277a8 modified at 3f27850 after it was freed
I am getting the following messages in the call stack window:
ntdll.dll!7c90120e()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
ntdll.dll!7c96e139()
ntdll.dll!7c94b535()
ntdll.dll!7c927573()
ntdll.dll!7c91005d()
ntdll.dll!7c927784()
ntdll.dll!7c927573()TEST.exe!_heap_alloc_base(unsigned int size=160036) Line 105 + 0x28 bytes C
TEST.exe!_heap_alloc_dbg_impl(unsigned int nSize=160000, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 427 + 0x9 bytes C++
TEST.exe!_nh_malloc_dbg_impl(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 239 + 0x19 bytes C++
TEST.exe!_nh_malloc_dbg(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0) Line 296 + 0x1d bytes C++
TEST.exe!malloc(unsigned int nSize=160000) Line 56 + 0x15 bytes C++
TEST.exe!TEST_IDP_FUNC1(unsigned char * pucSrcImg=0x07200068, unsigned char * pucDstImg=0x059d4d68, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 529 + 0x11 bytes C
TEST.exe!TEST_IDP_FUNC2(unsigned char * pucSrcImg=0x05aecc58, unsigned char * pucDstImg=0x03f00690, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, unsigned short uiDstRows=400, unsigned short uiDstCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 4117 + 0x1b bytes C
TEST.exe!CTEST::FUNC3(CTESTImage * objSrcImage=0x03e726c8, CTESTImage * objDstnImage=0x03e7a050, unsigned char * pucDstImg=0x03f00690) Line 107 + 0x25 bytes C++
TEST.exe!CTESTView::FUNC4() Line 8346 C++
TEST.exe!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x0039c900, unsigned int nID=32902, int nCode=0, void (void)* pfn=0x00401276, void * pExtra=0x00000000, unsigned int nSig=57, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 82 C++
TEST.exe!CCmdTarget::OnCmdMashwath1979 wrote:
I am allocating memory of size 160kb in a for loop
Don't do this. Use a standard STL container like
vectorinstead. The container will manage the heap allocations for you.«_Superman_» I love work. It gives me something to do between weekends.
Microsoft MVP (Visual C++) -
Code, plz. Urgent. Doesn't that work? :)
Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]
Chris Meech wrote:
I am Canadian. [heard in a local bar]
I don't get it (I feel stupid...). :)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles] -
Chris Meech wrote:
I am Canadian. [heard in a local bar]
I don't get it (I feel stupid...). :)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]Canadian Along with being a name for people like me who live in Canada, it also happens to be a popular beer[^]. Several years ago Molson's had a really good TV commercial that extolled the virtues of being a Canadian (as opposed to being American). :) Currently there's a good commercial about how "We have more square footage of awesomeness than any other country". :) Of course, most people just think of us as a land of polar bears, igloos, beavers and seal bashers. :)
Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]
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Canadian Along with being a name for people like me who live in Canada, it also happens to be a popular beer[^]. Several years ago Molson's had a really good TV commercial that extolled the virtues of being a Canadian (as opposed to being American). :) Currently there's a good commercial about how "We have more square footage of awesomeness than any other country". :) Of course, most people just think of us as a land of polar bears, igloos, beavers and seal bashers. :)
Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]
Ah, OK. Thank you. :beer:
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles] -
Hi All, I am running an application which is a form view application.I am allocating memory of size 160kb in a for loop .I am allocating memory at the begining of for loop for each iteration and freeing it at the end of each iteration.I have 133 such iteration.But i am facing a problem.In the 9th iteration when i am trying to allocate a memory using malloc the application crashes. I am getting the following messsage in the output window.
HEAP[TEST.exe]: HEAP: Free Heap block 3f277a8 modified at 3f27850 after it was freed
I am getting the following messages in the call stack window:
ntdll.dll!7c90120e()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
ntdll.dll!7c96e139()
ntdll.dll!7c94b535()
ntdll.dll!7c927573()
ntdll.dll!7c91005d()
ntdll.dll!7c927784()
ntdll.dll!7c927573()TEST.exe!_heap_alloc_base(unsigned int size=160036) Line 105 + 0x28 bytes C
TEST.exe!_heap_alloc_dbg_impl(unsigned int nSize=160000, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 427 + 0x9 bytes C++
TEST.exe!_nh_malloc_dbg_impl(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 239 + 0x19 bytes C++
TEST.exe!_nh_malloc_dbg(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0) Line 296 + 0x1d bytes C++
TEST.exe!malloc(unsigned int nSize=160000) Line 56 + 0x15 bytes C++
TEST.exe!TEST_IDP_FUNC1(unsigned char * pucSrcImg=0x07200068, unsigned char * pucDstImg=0x059d4d68, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 529 + 0x11 bytes C
TEST.exe!TEST_IDP_FUNC2(unsigned char * pucSrcImg=0x05aecc58, unsigned char * pucDstImg=0x03f00690, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, unsigned short uiDstRows=400, unsigned short uiDstCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 4117 + 0x1b bytes C
TEST.exe!CTEST::FUNC3(CTESTImage * objSrcImage=0x03e726c8, CTESTImage * objDstnImage=0x03e7a050, unsigned char * pucDstImg=0x03f00690) Line 107 + 0x25 bytes C++
TEST.exe!CTESTView::FUNC4() Line 8346 C++
TEST.exe!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x0039c900, unsigned int nID=32902, int nCode=0, void (void)* pfn=0x00401276, void * pExtra=0x00000000, unsigned int nSig=57, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 82 C++
TEST.exe!CCmdTarget::OnCmdMThis error means that your application has freed the memory but continued to use it or modify it after doing so. This can happen in a Windows application if you try to pass the memory to a window (like an edit box or other control) via the message queue using PostMessage, or an API call that uses PostMessage.
Software Zen:
delete this;
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