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Bug 5477 - Ubuntu 18.04.1&20.04 SDL_CloseAudioDevice hangs waiting for recording thread?
Summary: Ubuntu 18.04.1&20.04 SDL_CloseAudioDevice hangs waiting for recording thread?
Status: ASSIGNED
Alias: None
Product: SDL
Classification: Unclassified
Component: audio (show other bugs)
Version: 2.0.14
Hardware: x86_64 Linux
: P1 critical
Assignee: Ryan C. Gordon
QA Contact: Sam Lantinga
URL:
Keywords: target-2.0.16
Depends on:
Blocks:
 
Reported: 2021-01-18 02:03 UTC by superfury
Modified: 2021-01-21 17:31 UTC (History)
0 users

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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?