BSNES Mercury cores (Balanced and Performance tested) crash on various games when pressing volume up or down on Android device.

[gannon345]

Description

BSNES Mercury cores (Balanced and Performance tested) crash on various games when pressing volume up or down on Android device. Tested on a Nvidia Shield K1 tablet.

Issue is specific to BSNES cores. Does not occur in SNES9x core.

Expected behavior

Volume turns up or down.

Actual behavior

Retroarch crashes with an unexpected error

Steps to reproduce the bug

Launch a SNES game with the BSNES Mercury Performance or Balanced core. Press volume up or volume down hardware keys on Android phone or tablet.

I tested the problem on a Shield k1 tablet and confirmed it across multiple games. Tested 1.0 and 1.1 known good dumps of Mega Man X, as well as F-Zero, Legend of Zelda: Link to the Past, and Starfox.

All games not impacted. Tested Super Baseball 2020 and volume controls work.

Bisect Results

Unsure when issue started occurring, only encountered it today (9/16/2017) on RA 1.6.7.

Version/Commit

Google Play Store current version (1.6.7)

• RetroArch: 1.6.7

Environment information

• OS: Android 7 on Shield K1 tablet.
• Compiler: Unknown

[anyputer]

Yup, it also crashes for me. I was wondering why it constantly kept crashing. lmao
It even crashes randomly!

[ghost]

cant seem to replicate this on my crappy android device using Legend of Zelda: Link to the Past with latest f-droid-available retroarch and bsnes-mercury balanced core. possible to get and post logcat?

[gannon345]

How do I pull a logcat? I'll test it out when I can.

[spinktvis]

Logs from my OnePlus 5, one when I was running stock OOS OB3 8.0.0. Forgot which RetroArch version.

https://hastebin.com/emahufekaw.sql

Today's logs from latest Phoenix 8.1.0 ROM. Today's are using RetroArch 1.7.0 from play store.

Both times using bsnes-mercury-balanced.

https://hastebin.com/qigojeqowe.scala

[ghost]

As evidenced by this line in your last log @spinktvis:

01-27 15:23:47.893 F/DEBUG (17643): signal 7 (SIGBUS), code 1 (BUS_ADRALN), fault addr 0xd0842d2c

This looks like the same problem as libretro/QuickNES_Core#37 which was able to be fixed in software with a gcc workaround. The same should apply here, but the trick would be to find exactly what variable/struct it is that is somehow being misaligned.

@fr500 @twinaphex Maybe one of you guys could test other cores on similar devices with such kernel issues, like the Shield Tablet?

[andres-asm]

I was never able to replicate this on my devices but there was a related recent crash that was fixed by
b626037