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Still can't figure out crash in d3d_shutdown
Edgar Reynaldo
Member #8,592
May 2007

Well every time my program using my library shuts down, allegro crashes when my dll is being unloaded and it crashes in d3d_shutdown on the line _al_d3d->Release(), and Release must be a macro or something because gdb doesn't know about it, but _al_d3d appears to be a valid pointer, and it is the first time the shutdown code runs is when it crashes so I don't think it's a double free causing the issue.

Backtrace :

1Breakpoint 1, d3d_shutdown () at C:\downloads\Programming\ProgrammingLibraries\Allegro\5pt1pt8\allegro\src\win\d3d_disp.cpp:2610 22610 _al_d3d->Release(); 3(gdb) p _al_d3d 4$1 = (LPDIRECT3D9) 0x1a207e0 5(gdb) p _al_d3d->Release 6There is no member named Release. 7(gdb) p _al_d3d->Release() 8Couldn't find method IDirect3D9::Release 9(gdb) next 10 11Program received signal SIGSEGV, Segmentation fault. 120x6779fc80 in d3d_shutdown () at C:\downloads\Programming\ProgrammingLibraries\Allegro\5pt1pt8\allegro\src\win\d3d_disp.cpp:2610 132610 _al_d3d->Release(); 14(gdb) bt 15#0 0x6779fc80 in d3d_shutdown () at C:\downloads\Programming\ProgrammingLibraries\Allegro\5pt1pt8\allegro\src\win\d3d_disp.cpp:2610 16#1 0x6778fe1c in win_shutdown () at C:\downloads\Programming\ProgrammingLibraries\Allegro\5pt1pt8\allegro\src\win\wsystem.c:197 17#2 0x67730049 in shutdown_system_driver () at C:\downloads\Programming\ProgrammingLibraries\Allegro\5pt1pt8\allegro\src\system.c:77 18#3 0x67724019 in _al_run_exit_funcs () at C:\downloads\Programming\ProgrammingLibraries\Allegro\5pt1pt8\allegro\src\exitfunc.c:92 19#4 0x6773038d in al_uninstall_system () at C:\downloads\Programming\ProgrammingLibraries\Allegro\5pt1pt8\allegro\src\system.c:302 20#5 0x6ab41086 in __dll_exit () from c:\ctwoplus\progcode\eagle5gui\cbbuild\bin\eagle_a5d.dll 21#6 0x6ab4110a in DllMainCRTStartup@12 () from c:\ctwoplus\progcode\eagle5gui\cbbuild\bin\eagle_a5d.dll 22#7 0x77d0ded4 in ntdll!RtlDefaultNpAcl () from C:\Windows\system32\ntdll.dll 23#8 0x77cfa959 in ntdll!RtlExtendMemoryBlockLookaside () from C:\Windows\system32\ntdll.dll 24#9 0x77cfa8db in ntdll!RtlExtendMemoryBlockLookaside () from C:\Windows\system32\ntdll.dll 25#10 0x76a13d77 in KERNEL32!ExitThread () from C:\Windows\system32\kernel32.dll 26#11 0x00000000 in ?? () 27(gdb)

What kind of debugging should I be doing to figure out the cause of this? Any tips or advice or questions are welcome.

Kris Asick
Member #1,424
July 2001

Not quite sure without seeing more code, but shutdown crashes are typically one of two things: Memory leaks, or things being uninitialized/destroyed in the wrong order.

--- Kris Asick (Gemini)

Member #7,827
October 2006

Could also be something related to threading and TLS. There's a WANT_DLL_TLS CMake switch that might be interesting to toggle.

"For in much wisdom is much grief: and he that increases knowledge increases sorrow."-Ecclesiastes 1:18
[SiegeLord's Abode][Codes]:[DAllegro5]:[RustAllegro]

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