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Bug 5477

Summary: Ubuntu 18.04.1&20.04 SDL_CloseAudioDevice hangs waiting for recording thread?
Product: SDL Reporter: superfury
Component: audioAssignee: Ryan C. Gordon <icculus>
Status: ASSIGNED --- QA Contact: Sam Lantinga <slouken>
Severity: critical    
Priority: P1 Keywords: target-2.0.16
Version: 2.0.14   
Hardware: x86_64   
OS: Linux   

Description superfury 2021-01-18 02:03:09 UTC 
I notice that somehow the SDL_CloseAudioDevice terminating the recording thread causes it to hang, waiting for the thread to terminate.

I found this on my own application (UniPCemu). Then also verified it to happen on the testaudiocapture test app when requesting it to terminate.

I simply checked out the repository, checked out 2.0.14, configured and built it according to the SDL manual's steps and then installed it for use with both applications.
Comment 1 superfury 2021-01-18 02:30:12 UTC 
Looking at what gdb is saying, it seems to be using some pulseaudio audio driver? Perhaps that's related?
Comment 2 superfury 2021-01-18 21:11:58 UTC 
This is happening on gcc-10 at least.
Comment 3 superfury 2021-01-19 17:01:28 UTC 
Also verified on gcc 7.5.0 as well as both 7.5.0 and gcc-10 on the latest Ubuntu version (Ubuntu 20.04).

Currently using Ubuntu 20.04 with gcc 7.5.0 due to specific warnings spamming using the gcc-8/gcc-9/gcc-10 compiler.

SDL just can't seem to terminate the recording audio service (threading) properly?