SIGSEGV when using SKCanvas.DrawText() and then SKCanvas.Flush()

[mattleibow]

Description

The app crashes when drawing text and then flushing the canvas. Waiting on a response from Google to address this.

Basic Information

• Version with issue: 1.68.0
• Last known good version: 1.60.3
• IDE: N/A
• Platform Target Frameworks:
  • Android: 8.1
• Target Devices:
  • Pixel 2 and Razer Phone

Links

• skia bug: https://bugs.chromium.org/p/skia/issues/detail?id=8425
• "repro" case: https://github.com/mattleibow/NativeAndroidSkiaSharp

VS bug #736300

[mattleibow]

After doing some more research, I found out several things:

• it works fine in the emulator
• it works fine as a debug build

As a result, there appears to be something going wrong for ARM when the optimizations are at -Os. I had a try with -O3 and it appears to solve the issue.

However, this does incur a penalty with the size no longer being the main point. As a result, the size increases by about 800KB-1200KB depending on the architecture.

For this release, I will go with a larger binary that works over a smaller one that can't do GPU. I have reported the issue to Google along with all the information I could find. Hopefully, they can find out exactly what the issue is and provide a real fix.

[apaatsio]

I found this issue on google because I'm experiencing a similar bug on a Flutter app. See flutter/flutter#29751 and my comment

There seem to be many common denominators (Pixel 2, Android 8.1, drawing text, SIGSEGV during SKCanvas.Flush()) so I was wondering if these things could be related.

Unfortunately, I can't see the Skia issue 8425 that @mattleibow linked. It's giving me "Permission denied" so I can't dig deeper into this.