Memory leaks

[gvanem]

I've experimented with using the excellent Visual Leak Detector (VLD)
from https://kinddragon.github.io/vld/

Building _dearpygui.pyd (with MSVC/x86) with it and doing a simple:

  py -3 -c "from dearpygui.dearpygui import *"

shows 8 leaks from VLD (edited and trimmed down in size):

---------- Block 14614 at 0x00A04E48: 744 bytes ----------
  Leak Hash: 0x2E362F05, Count: 1, Total 744 bytes
  Call Stack (TID 10844):
    ucrtbase.dll!malloc()
    d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp (35): _dearpygui.pyd!operator new() + 0x8 bytes
    f:\gv\VC_2019\VC\Tools\MSVC\14.29.30037\include\memory (3416): _dearpygui.pyd!std::make_unique<Marvel::mvItemRegistry,0>() + 0xA bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (162): _dearpygui.pyd!Marvel::mvApp::mvApp() + 0x5 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (46): _dearpygui.pyd!Marvel::mvApp::GetApp() + 0x1F bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCore.h (216): _dearpygui.pyd!Marvel::constexpr_for<1,152,1,<lambda_456234d070a1ccd2d4f8bcc62abe4443> >() + 0x1A bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (21): _dearpygui.pyd!Marvel::mvModule_DearPyGui::GetSubMethods() + 0x9 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (104): _dearpygui.pyd!PyInit__dearpygui()
    c:\build\cpython36\python\import.c (1984): python36.dll!_imp_create_dynamic_impl()
    ...

---------- Block 14617 at 0x017D6530: 64 bytes ----------
  Leak Hash: 0x3FC84B43, Count: 1, Total 64 bytes
  Call Stack (TID 10844):
    ucrtbase.dll!malloc()
    d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp (35): _dearpygui.pyd!operator new() + 0x8 bytes
    f:\gv\VC_2019\VC\Tools\MSVC\14.29.30037\include\xhash (287): _dearpygui.pyd!std::_Hash_vec<std::allocator<std::_List_unchecked_iterator<std::_List_val<std::_List_simple_types<std::pair<unsigned __int64 const ,std::shared_ptr<Marvel::mvAppItem> > > > > > >::_Assign_grow() + 0x2F bytes
    ...


---------- Block 14632 at 0x01826DF8: 12 bytes ----------
  Leak Hash: 0xC116877D, Count: 1, Total 12 bytes
  Call Stack (TID 10844):
    ucrtbase.dll!malloc()
    d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp (35): _dearpygui.pyd!operator new() + 0x8 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCallbackRegistry.cpp (42): _dearpygui.pyd!Marvel::mvCallbackRegistry::mvCallbackRegistry() + 0xA8 bytes
    f:\gv\VC_2019\VC\Tools\MSVC\14.29.30037\include\memory (3416): _dearpygui.pyd!std::make_unique<Marvel::mvCallbackRegistry,0>() + 0x22 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (163): _dearpygui.pyd!Marvel::mvApp::mvApp() + 0x14 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (46): _dearpygui.pyd!Marvel::mvApp::GetApp() + 0x1F bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCore.h (216): _dearpygui.pyd!Marvel::constexpr_for<1,152,1,<lambda_456234d070a1ccd2d4f8bcc62abe4443> >() + 0x1A bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (21): _dearpygui.pyd!Marvel::mvModule_DearPyGui::GetSubMethods() + 0x9 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (104): _dearpygui.pyd!PyInit__dearpygui()
    c:\build\cpython36\python\import.c (1984): python36.dll!_imp_create_dynamic_impl()
    ...


---------- Block 14631 at 0x01826E88: 12 bytes ----------
  Leak Hash: 0x9DF7D7D3, Count: 1, Total 12 bytes
  Call Stack (TID 10844):
    ucrtbase.dll!malloc()
    d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp (35): _dearpygui.pyd!operator new() + 0x8 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCallbackRegistry.cpp (42): _dearpygui.pyd!Marvel::mvCallbackRegistry::mvCallbackRegistry() + 0x53 bytes
    f:\gv\VC_2019\VC\Tools\MSVC\14.29.30037\include\memory (3416): _dearpygui.pyd!std::make_unique<Marvel::mvCallbackRegistry,0>() + 0x22 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (163): _dearpygui.pyd!Marvel::mvApp::mvApp() + 0x14 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (46): _dearpygui.pyd!Marvel::mvApp::GetApp() + 0x1F bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCore.h (216): _dearpygui.pyd!Marvel::constexpr_for<1,152,1,<lambda_456234d070a1ccd2d4f8bcc62abe4443> >() + 0x1A bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (21): _dearpygui.pyd!Marvel::mvModule_DearPyGui::GetSubMethods() + 0x9 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (104): _dearpygui.pyd!PyInit__dearpygui()
    c:\build\cpython36\python\import.c (1984): python36.dll!_imp_create_dynamic_impl()
    ...

---------- Block 14615 at 0x0182E850: 8 bytes ----------
  Leak Hash: 0x244C3CFD, Count: 1, Total 8 bytes
  Call Stack (TID 10844):
    ucrtbase.dll!malloc()
    d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp (35): _dearpygui.pyd!operator new() + 0x8 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\AppItems\mvItemRegistry.cpp (168): _dearpygui.pyd!Marvel::mvItemRegistry::mvItemRegistry() + 0xA0 bytes
    f:\gv\VC_2019\VC\Tools\MSVC\14.29.30037\include\memory (3416): _dearpygui.pyd!std::make_unique<Marvel::mvItemRegistry,0>() + 0x22 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (162): _dearpygui.pyd!Marvel::mvApp::mvApp() + 0x5 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (46): _dearpygui.pyd!Marvel::mvApp::GetApp() + 0x1F bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCore.h (216): _dearpygui.pyd!Marvel::constexpr_for<1,152,1,<lambda_456234d070a1ccd2d4f8bcc62abe4443> >() + 0x1A bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (21): _dearpygui.pyd!Marvel::mvModule_DearPyGui::GetSubMethods() + 0x9 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (104): _dearpygui.pyd!PyInit__dearpygui()
    c:\build\cpython36\python\import.c (1984): python36.dll!_imp_create_dynamic_impl()
    ...

---------- Block 14616 at 0x01830380: 24 bytes ----------
  Leak Hash: 0x888694F2, Count: 1, Total 24 bytes
  Call Stack (TID 10844):
    ucrtbase.dll!malloc()
    d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp (35): _dearpygui.pyd!operator new() + 0x8 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\AppItems\mvItemRegistry.cpp (168): _dearpygui.pyd!Marvel::mvItemRegistry::mvItemRegistry() + 0xF3 bytes
    f:\gv\VC_2019\VC\Tools\MSVC\14.29.30037\include\memory (3416): _dearpygui.pyd!std::make_unique<Marvel::mvItemRegistry,0>() + 0x22 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (162): _dearpygui.pyd!Marvel::mvApp::mvApp() + 0x5 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (46): _dearpygui.pyd!Marvel::mvApp::GetApp() + 0x1F bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCore.h (216): _dearpygui.pyd!Marvel::constexpr_for<1,152,1,<lambda_456234d070a1ccd2d4f8bcc62abe4443> >() + 0x1A bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (21): _dearpygui.pyd!Marvel::mvModule_DearPyGui::GetSubMethods() + 0x9 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (104): _dearpygui.pyd!PyInit__dearpygui()
    c:\build\cpython36\python\import.c (1984): python36.dll!_imp_create_dynamic_impl()
    ...


---------- Block 14613 at 0x0187C198: 56 bytes ----------
  Leak Hash: 0x93F2E0F0, Count: 1, Total 56 bytes
  Call Stack (TID 10844):
    ucrtbase.dll!malloc()
    d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp (35): _dearpygui.pyd!operator new() + 0x8 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (46): _dearpygui.pyd!Marvel::mvApp::GetApp() + 0x7 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCore.h (216): _dearpygui.pyd!Marvel::constexpr_for<1,152,1,<lambda_456234d070a1ccd2d4f8bcc62abe4443> >() + 0x1A bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (21): _dearpygui.pyd!Marvel::mvModule_DearPyGui::GetSubMethods() + 0x9 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (104): _dearpygui.pyd!PyInit__dearpygui()
    c:\build\cpython36\python\import.c (1984): python36.dll!_imp_create_dynamic_impl()
    c:\build\cpython36\python\clinic\import.c.h (289): python36.dll!_imp_create_dynamic() + 0xB bytes
    ...


---------- Block 14630 at 0x0189C130: 312 bytes ----------
  Leak Hash: 0x9D74DBC7, Count: 1, Total 312 bytes
  Call Stack (TID 10844):
    ucrtbase.dll!malloc()
    d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp (35): _dearpygui.pyd!operator new() + 0x8 bytes
    f:\gv\VC_2019\VC\Tools\MSVC\14.29.30037\include\memory (3416): _dearpygui.pyd!std::make_unique<Marvel::mvCallbackRegistry,0>() + 0xA bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (163): _dearpygui.pyd!Marvel::mvApp::mvApp() + 0x14 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvApp.cpp (46): _dearpygui.pyd!Marvel::mvApp::GetApp() + 0x1F bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\mvCore.h (216): _dearpygui.pyd!Marvel::constexpr_for<1,152,1,<lambda_456234d070a1ccd2d4f8bcc62abe4443> >() + 0x1A bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (21): _dearpygui.pyd!Marvel::mvModule_DearPyGui::GetSubMethods() + 0x9 bytes
    F:\MingW32\src\GUI\DearPyGui\DearPyGui\src\core\Modules\mvModule_DearPyGui.cpp (104): _dearpygui.pyd!PyInit__dearpygui()
    c:\build\cpython36\python\import.c (1984): python36.dll!_imp_create_dynamic_impl()
    c:\build\cpython36\python\clinic\import.c.h (289): python36.dll!_imp_create_dynamic() + 0xB bytes
    ...

Visual Leak Detector detected 8 memory leaks (1232 bytes).
Largest number used:  782.880 bytes.
Total allocations:  2.067.919 bytes.

Some STL memory left un-freed. I'm not sure it's a false positive or not.

[hoffstadt]

We will look into it!

[hoffstadt]

I believe most of these have been addressed for 1.0. Moving this to the trash for the moment until we can confirm its still an issue with 1.0.

[gvanem]

A git describe --tags shows v0.8.62-104-gb7c8defd. Seems to me a v1.0 is far away (?)

[hoffstadt]

About 15 hours away! lol