35 lines
3.2 KiB
Plaintext
35 lines
3.2 KiB
Plaintext
[video output=day347 member=cmuratori stream_platform=twitch stream_username=handmade_hero project=code title="Debugging Win32 Memory List Corruption" vod_platform=youtube id=wuYRpxnE9R8 annotator=Miblo]
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[0:09][Recap and set the stage for the day]
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[1:49][Run the game to demo the bug with the looped live code editing, and begin investigating it]
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[5:48][win32_handmade.cpp: Walk through how PLATFORM_ALLOCATE_MEMORY(), PLATFORM_DEALLOCATE_MEMORY() and Win32FreeMemoryBlock() work]
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[11:35][Step in to Win32FreeMemoryBlock() to gauge the rarity of this bug]
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[15:34][win32_handmade.cpp: Introduce Win32VerifyMemoryListIntegrity()]
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[19:11][win32_handmade.cpp: Make PLATFORM_ALLOCATE_MEMORY() call Win32VerifyMemoryListIntegrity() at the end and start, run and hit the one at the start]
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[24:59][win32_handmade.cpp: Make Win32VerifyMemoryListIntegrity() increment a FailCounter, :run the game and locate the failure case]
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[28:40][Step in to Win32VerifyMemoryListIntegrity() and identify who is getting written and when]
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[30:35][Set a data breakpoint on the Size, run the game and see who touched that memory location]
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[35:58][Look at where we set PushBufferBase, fix up RenderCommandsStruct() and correctly initialise the PushBuffer]
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[38:01][Run the game and find that the bug is dead]
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[38:46][win32_handmade.cpp: Remove the calls to Win32VerifyMemoryListIntegrity(), run the game and see that we're still okay]
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[40:16][win32_handmade.cpp: Introduce Win32GetMemoryStats() in order to initialise arenas with debug information]
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[43:43][handmade_platform.h: Introduce DEBUG_PLATFORM_GET_MEMORY_STATS()]
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[46:26][handmade_debug.cpp: Enable DEBUGEnd() to print the memory stats]
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[49:28][handmade_shared.h: Enable FormatStringList() to handle the l case]
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[51:12][Run the game and consult the profiler]
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[52:39][Q&A][:speech]
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[53:29][@thesizik][long is >= 32 bits, long long is >= 64 bits]
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[55:00][@pseudonym73][Windows is LLP64, everything else is LP64. The only difference between the two is the size of long. Everything else (short, int, long long) is the same]
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[57:35][@zilarrezko][Is there any plan on organizing the episodes in a manner such as "Worked on mandalas on these episodes"?[ref
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site="YouTube"
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page="Handmade Hero Playlists"
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url="https://www.youtube.com/user/handmadeheroarchive/playlists"]]
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[59:49][@Miblo][We'll have "category tagging" in the new annotation system]
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[1:00:55][@doritosranger][Would Handmade Hero get a version for Linux or is it strictly a windows project? If it's true, why not using Linux in work? Is it personal choice or is it harder to debug something on windows?]
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[1:04:14][@dudeinbasement1][Winners don't use drugs message needs to be added in the game's loading screen]
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[1:04:30][@zilarrezko][Seems like the questions aren't polling in... Do you usually put your rendering / updating / input processing in the same function like you have been doing?]
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[1:05:12][@edvinholm][Is the bending of the hero's body going to be like it is now? Looks a bit weird]
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[1:05:43][@samnchiet][On moving from Windows to Linux, how much of the onus of making this change lies on the consumers vs Linux OS "designers"? Linux distros aren't normally ordinary-user friendly]
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[1:06:31][@doritosranger][What do you think about free software (Stallman, FSF, GPL)?]
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[1:13:08][Close it up][:speech]
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[/video]
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