View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0032616 | Community | OCCT:Samples | public | 2021-10-12 13:37 | 2022-10-19 15:50 |
| Reporter | occ_siddhesh_nikam | Assigned To | |||
| Priority | normal | Severity | just a question | ||
| Status | new | Resolution | open | ||
| Platform | Windows | OS | Windows | ||
| Product Version | 7.5.0 | ||||
| Summary | 0032616: Samples, MFC - Error on debugging (Standard_MMgrRaw::Free) | ||||
| Description | Hello Sir, I have just started a new project with OCCT 7.5.0. I have simply added following lines in "Application.cpp" file generated by "MFC": # Handle(Aspect_DisplayConnection) aDisplayConnection; # myGraphicDriver = new OpenGl_GraphicDriver(aDisplayConnection); It is working properly. But when I close the Main Window, the code throws an error by opening a file <Standard_MMgrRaw.cxx> # void Standard_MMgrRaw::Free(Standard_Address theStorage) # { # free(theStorage); # } Is it a memory leak due to dynamic memory allocation of "Handle" Graphic3d_GraphicDriver? How to resolve this? Please help. Thanks. | ||||
| Tags | No tags attached. | ||||
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Provided information is incomplete. >I have simply added following lines in "Application.cpp" file generated by "MFC": > # Handle(Aspect_DisplayConnection) aDisplayConnection; > # myGraphicDriver = new OpenGl_GraphicDriver(aDisplayConnection); There is no declaration of myGraphicDriver in quoted code, so I suppose that the sample is much more complicated than "simply added following lines" to a freshly written project. |
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Thanks for the reply. In the "Application.h" header file, I have already declared a variable # Handle(Graphic3d_GraphicDriver) myGraphicDriver; It is giving the error. I never faced this error in older version of OCCT (OCCT 7.2.0). Please help! Thanks. |
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Hello kgv, As I understood, a "Handle" is a smart_pointer in OCCT with automatic memory deallocation. Is it correct? I am not getting why the above error is generating? Is it a bug in OCCT 7.5? Please guide! |
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> a "Handle" is a smart_pointer in OCCT with automatic memory deallocation. Yes. > I am not getting why the above error is generating? The problem description is unclear. I would guess that this might be related to MFC-specific stuff overriding memory allocation routines for debugging purposes. Are you running Debug/Release application paired with Debug/Release OCCT builds? Does it happen in both Debug and Release builds? |
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Hello kgv, > Are you running Debug/Release application paired with Debug/Release OCCT builds? * I have built OCCT 7.5 with CMake and followed the occt_mfc example: "04_Viewer3D." * I have set Compiler, Linker and Runtime properties by referring "Viewer3D.sln" > Does it happen in both Debug and Release builds? It is throwing an error when I close the window by pressing "X" button in both Release and Debug version. Screenshot attached: 1) error with "Debug" version (black background). 2) error with "Release" version. Thanks. |
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memory leak error occt 7.5.png (47,927 bytes) |
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release build_error.png (13,296 bytes) |
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OpenGI_GraphicDriver.png (97,132 bytes) |
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Dear kgv, I am unable to find "why I am getting Graphic_Driver related run-time error." What is wrong in the following lines? # Handle(Graphic3d_GraphicDriver) myGraphicDriver; # Handle(Aspect_DisplayConnection) aDisplayConnection; # myGraphicDriver = new OpenGl_GraphicDriver(aDisplayConnection); Is it related to occt-project properties in Visual Studio 2019? or what else? I request you, please kindly suggest some ways to overcome this problem. Thanks. |
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> What is wrong in the following lines? There is nothing wrong with these particular lines - it is a usual allocation of an object, that could be seen in OCCT samples. Have you tried building samples coming with OCCT - do they crash in your environment? Normally, Graphic3d_GraphicDriver instance is not stored as a class field at GUI level - there is no point in it, as it is stored inside created V3d_Viewer; moreover, many applications create graphic driver as a singleton. > I request you, please kindly suggest some ways to overcome this problem. This bugtracker is focused on bug reports. You might get a better help from community on user forums or using OCC support services. https://dev.opencascade.org/forums |
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> Have you tried building samples coming with OCCT - do they crash in your environment? Yes, I have tried OCCT samples. All are working without error under same environment. Thanks for the reply. |
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Dear kgv, The problem has solved now. Actually, I had selected an option "USE_GLES2 instead of OpenGL" in "CMake" while building OCCT. I rebuilt OCCT by unchecking above option in "CMake" and it worked. As suggested by you before, I have updated from version 7.2 to 7.5 because, in version 7.2, multiple "V3d_View" windows (created in a dialog) does not appear simultaneously. It is giving very weird behavior while opening the dialog box. (**Please see "Issue ID: 0032532" which is currently unresolved.) Also, by adding a line: # m_hView->SetImmediateUpdate(Standard_False); all "V3d_View" windows disappear. I think, "V3d_View" should avoid the automatic implicit window redraw. (with "GLES" option, "V3d_View" multiple windows appear simultaneously; but it gives memory leak error "Standard_MMgrRaw::Free" on runtime.) Thanks. |
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> (with "GLES" option, "V3d_View" multiple windows appear simultaneously; but it gives memory leak error "Standard_MMgrRaw::Free" on runtime.) Why do you call it "memory leak"? I don't see any leaks in your messages, just some memory issues. |
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Dear kgv, > Why do you call it "memory leak"? Thanks for correcting me. It will be very helpful if you could little bit explain, * why multiple "V3d_View" windows appear simultaneously with "GLES" option? * why not it is happening with "OpenGl" option? Also, by adding a line/code # m_hView->SetImmediateUpdate(Standard_False); all "V3d_View" windows disappear. Thanks. (Here onwards I will not ask any query here except bugs.) |
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> * why multiple "V3d_View" windows appear simultaneously with "GLES" option? Angle implementation of OpenGL ES on top of Direct3D is quite specific and has side effects - it doesn't work transparently and might require adaptation at application level. So far, I never built MFC samples with Angle library, so I don't know if this combination works or not. Note that within OCCT 7.6.0 the GLES option in OCCT configuration will enable building of a dedicated library TKOpenGles (depending on GLES) in addition to TKOpenGl (depending on a desktop OpenGL). There are small practical reasons using limited OpenGL ES on desktop systems - OpenGL is certainly a preferred choice. > Also, by adding a line/code > # m_hView->SetImmediateUpdate(Standard_False); >all "V3d_View" windows disappear. I don't quite understand - this line is present in standard MFC samples (OCC_BaseView::OnInitialUpdate()). Do these sample work incorrectly, or you refer to SetImmediateUpdate() only in context of GLES option? |
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Hello kgv, I have created three separate "V3d_View" windows (say window_1, window_2 and window_3) in a single MFC dialog. I have used MFC "static control" as a parent. When I open a dialog, not all three windows appear at once. Instead of this, window_1 appears 1st, then window_2, then window_3. It is looking very weird visually. To avoid this, as per our previous discussion in an Issue No. "0032532", I called "V3d_View::SetImmediateUpdate(Standard_False);" but instead of solving the above problem, it deactivates "V3d_View" and dialog only shows three "static controls." (This is shown in Figure 1 and 2) There is no any MFC sample which contains multiple (more than 1) "V3d_View" windows in a single dialog. Thanks. |
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V3d_View.png (9,789 bytes) |
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> There is no any MFC sample which contains multiple Consider attaching a minimal sample-reproducer to the bug or sharing it on GitHub. |
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Hello kgv, I have created a sample dialog in MFC with three "V3d_View" windows. I have uploaded the sample files on a GitHub. Here is the link... https://github.com/nikamsv/V3d_View_Dlg.git (Kindly note that, I am using GitHub first time. If you notice any mistake, please let me know.) Thank you. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2021-10-12 13:37 | occ_siddhesh_nikam | New Issue | |
| 2021-10-12 13:37 | occ_siddhesh_nikam | Assigned To | => kgv |
| 2021-10-12 13:50 | kgv | Severity | minor => just a question |
| 2021-10-12 13:52 | kgv | Note Added: 0104604 | |
| 2021-10-12 14:25 | occ_siddhesh_nikam | Note Added: 0104606 | |
| 2021-10-12 14:26 | occ_siddhesh_nikam | Note Edited: 0104606 | |
| 2021-10-12 14:28 | occ_siddhesh_nikam | Note Edited: 0104606 | |
| 2021-10-12 17:17 | occ_siddhesh_nikam | Note Edited: 0104606 | |
| 2021-10-14 10:10 | occ_siddhesh_nikam | Note Added: 0104631 | |
| 2021-10-14 11:37 | kgv | Note Added: 0104632 | |
| 2021-10-14 13:54 | occ_siddhesh_nikam | Note Added: 0104634 | |
| 2021-10-14 13:55 | occ_siddhesh_nikam | File Added: memory leak error occt 7.5.png | |
| 2021-10-14 13:57 | occ_siddhesh_nikam | File Added: release build_error.png | |
| 2021-10-14 13:59 | occ_siddhesh_nikam | Note Edited: 0104634 | |
| 2021-10-16 10:26 | occ_siddhesh_nikam | File Added: OpenGI_GraphicDriver.png | |
| 2021-10-16 10:35 | occ_siddhesh_nikam | Note Added: 0104668 | |
| 2021-10-16 11:38 | kgv | Note Added: 0104673 | |
| 2021-10-16 11:38 | kgv | Note Edited: 0104673 | |
| 2021-10-16 11:39 | kgv | Note Edited: 0104673 | |
| 2021-10-16 13:58 | occ_siddhesh_nikam | Note Added: 0104690 | |
| 2021-10-18 11:26 | occ_siddhesh_nikam | Note Added: 0104695 | |
| 2021-10-18 12:27 | kgv | Note Added: 0104701 | |
| 2021-10-18 12:28 | kgv | Category | OCCT:Application Framework => OCCT:Samples |
| 2021-10-18 12:28 | kgv | Summary | Erro on debugging (Standard_MMgrRaw::Free) => Samples, MFC - Error on debugging (Standard_MMgrRaw::Free) |
| 2021-10-19 17:36 | occ_siddhesh_nikam | Note Added: 0104747 | |
| 2021-10-20 11:42 | kgv | Note Added: 0104758 | |
| 2021-10-20 11:42 | kgv | Note Edited: 0104758 | |
| 2021-10-20 11:43 | kgv | Note Edited: 0104758 | |
| 2021-10-21 11:43 | occ_siddhesh_nikam | Note Added: 0104776 | |
| 2021-10-21 11:43 | occ_siddhesh_nikam | File Added: V3d_View.png | |
| 2021-10-21 12:21 | kgv | Note Added: 0104780 | |
| 2021-10-22 18:00 | occ_siddhesh_nikam | Note Added: 0104801 | |
| 2022-10-19 15:50 |
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Assigned To | kgv => vpozdyayev |
