mdbx_env_open returns error 22 (Invalid argument) on 32-bit Android devices

[simc]

I tried to open an environment (with and) without any options or flags (mode 0600) all 64-bit targets work without issues but on older 32-bit Android devices I get error 22 when opening an environment.

[erthink]

Presumably the problem is that 32-bit android kernels do not allow you to create large-size memory mappings. Please try create/open a small sized DB, about of 1 Mb.

[simc]

I tried not setting the geometry. Isn't the default size pretty small?

[erthink]

I tried not setting the geometry. Isn't the default size pretty small?

Should be.

Could you run your exe/application, or a minimal testcase, under the strace ?

[simc]

Unfortunately that doesn't work on Android. The debugging options for native code are very limited (non-existent?).

I hoped you might have an idea what could be wrong but I understand that it's difficult without more information.

[erthink]

I hoped you might have an idea what could be wrong but I understand that it's difficult without more information.

No ideas, except the mapping size may made behavior significantly difference under a 32- and 64-bit environments.

[erthink]

Please try this. There is no other reasonable way.

[simc]

Oh that's cool. But it requires a rooted 32-bit device. Will take me some time to get it. I'll post my findings here :+1:

[erthink]

Please write down what you got. Otherwise, there is a risk that I will significantly postpone fixing this issue, even if it will be confirmed.

[simc]

Sorry, I still don't have a 32-bit Android device. It's no problem if the fix takes a little longer 🙂

[erthink]

Sorry, I still don't have a 32-bit Android device. It's no problem if the fix takes a little longer slightly_smiling_face

Assume the AVD will enough, but not sure.