bumptech/glide

Possible issue with Android O : bitmaps stored on native memory, uncaught OOM, ...

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#2788 opened on Jan 4, 2018

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 (5 comments) (0 reactions) (0 assignees)Java (35,023 stars) (6,176 forks)batch import
enhancementhelp wanted

Description

The app I'm using Glide on is for Android 8.1 and above. I think I know now why I couldn't decide what's going on with memory (written here) : Bitmaps seem to be stored on native memory .

Does Glide have the needed modifications to consider this?

For example, since it uses memory cache, it might not need to look at the heap memory size, to decide on the default mem cache size, or maybe it could set it to be the same size...

Not only that, but it seems that OOM exception might not be thrown at all in case you try to decode images, and you might get NPE instead on some other cases. This means Glide might need to have a different way to capture errors of bitmap allocations (unless it never did such a thing anyway).

On the other hand, I can't find a way to get the max native memory the OS allows the app to have, as well as many other memory related tools I had in the past. Because of this, I've written about it all here.

Contributor guide

Tech stack
javaandroid
Domain
mobileperformance
Issue type
research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Android memory managementGlide memory cache
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Investigate how Glide's memory cache (e.g., LruResourceCache) and BitmapPool handle bitmap allocations on Android O+ where bitmaps are stored in native heap. Review Glide's code for catching OutOfMemoryError during bitmap decoding, particularly in Downsampler and BitmapFactory. Check if there is a way to query the OS for max native memory. Propose modifications to adjust cache sizes based on native heap limits if possible.