Encountering segfault after MonoTests.System.Linq.Expressions.ExpressionTest_MemberBind on 32bit Android devices when using AOT+LLVM

[pjcollins]

Somewhat similar to #1444, I'm also hitting a segfault when running the new set of NUnit BCL tests on the majority of "older" devices when compiled in Release mode with both AOT+LLVM enabled. Given the timing and a quick review of the test runner, this crash is potentially occurring during a GC attempt after the fixture completes?

The same set of tests execute successfully without crashing on newer 64bit devices when both AOT and LLVM are enabled, however there are some new failures (which I will file as a separate issue).

Steps to Reproduce

1. Download prebuilt .apk file, and run it on an older device:

adb install 15-7-aotllvm-Xamarin.Android.Bcl_Tests-Signed.apk
adb shell am instrument -w Xamarin.Android.Bcl_Tests/xamarin.android.bcltests.NUnitInstrumentation

Details

Link to .apk file - https://microsoft-my.sharepoint.com/:u:/p/pecolli/EYrN-tuwhJFJmkrnwj5vAgIBzEQFPGZkCUcmSkNMJUYMUg?e=LBt3gv
Link to obj output - https://microsoft-my.sharepoint.com/:u:/p/pecolli/EXGoMM2LZURMhg8mPY8IUyoBgDudDiDsjXrLA86zaPjHSQ?e=3YL4a8

Version Information

Windows 10 w/ VS 15.7
Xamarin.Android SDK 8.3.0.5 (HEAD/1a8ed5388)

Log File

Nexus 10 v5.1.1 (armeabi-v7a) - http://xqa.blob.core.windows.net/gist/log-56e8718213e442b786d5bc0446febaad.txt
Nexus 5 v6.0 (armeabi-v7a) - https://gist.githubusercontent.com/pjcollins/a0f65c74caf7cebe64cc6685ad05a821/raw/351c559bf50bf40719ff6a9c0b86d66edabd9449/gistfile1.txt

[grendello]

Assesment: possible duplicated (or very closely related) of issue #1444

[luhenry]

/cc @vargaz could you please take a look?

[pjcollins]

I'm going to remove the d15-7 milestone at this point based on related severity/priority discussions.

[pjcollins]

This is still reproducible with d15-8. I've moved this to the mono repo: mono/mono#9345