[iOS/tvOS] BigInteger tests running out-of-memory

[matouskozak]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=757260&view=ms.vss-test-web.build-test-results-tab&runId=19205408&resultId=107014&paneView=debug
Build error leg or test failing: System.Tests.DecimalTests+BigInteger[Add/Div/Mul].Test
Affected CI: ios_arm64_release_allsubsets_mono, ios_arm64_release_allsubsets_mono
The issues doesn't seem to be 100% reproducible and is failing occasionally on the CI

The first failure on rolling build CI happenned on 24th of July 10:00 (CEST) https://dev.azure.com/dnceng-public/public/_build/results?buildId=753200&view=results corresponding to 703df3b

Stack trace example:

[17:51:30.6376040] 2024-07-26 17:51:30.636 System.Runtime.Tests[40033:121905450] 	[FAIL] System.Tests.DecimalTests+BigIntegerAdd.Test
[17:51:30.6376740] System.OutOfMemoryException : Insufficient memory to continue the execution of the program.
[17:51:30.6377030]    at System.GC.AllocateArray[UInt32](Int32 length, Boolean pinned)
[17:51:30.6378010] 2024-07-26 17:51:30.636 System.Runtime.Tests[40033:121905450]    at System.GC.AllocateUninitializedArray[UInt32](Int32 length, Boolean pinned)
[17:51:30.6378340]    at System.Buffers.SharedArrayPool`1[[System.UInt32, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Rent(Int32 minimumLength)
[17:51:30.6380530] 2024-07-26 17:51:30.636 System.Runtime.Tests[40033:121905450]    at System.Numerics.BigInteger.Multiply(ReadOnlySpan`1 left, Int32 leftSign, ReadOnlySpan`1 right, Int32 rightSign)
[17:51:30.6380990]    at System.Numerics.BigInteger.op_Multiply(BigInteger left, BigInteger right)
[17:51:30.6381220]    at System.Tests.DecimalTests.BigDecimal.Add(BigDecimal value, Boolean& overflow)
[17:51:30.6381330] 2024-07-26 17:51:30.636 System.Runtime.Tests[40033:121905450]    at System.Tests.DecimalTests.BigIntegerAdd.Test()
[17:51:30.6381450]    at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
[17:51:30.6381530]    at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

[16:51:43.0371740] 2024-07-29 13:51:43.082 System.Runtime.Tests[36143:107068255] 	[FAIL] System.Tests.DecimalTests+BigIntegerMul.Test
[16:51:43.0372230] Assert.Equal() Failure: -6773724285713928637.9 * 0.000000000000001533938174
[16:51:43.0372340] Expected: 0.0000000000000000000000000
[16:51:43.0372420] Actual:   -10390.474262007477981186633195
[16:51:43.0372510] 2024-07-29 13:51:43.082 System.Runtime.Tests[36143:107068255]    at System.Tests.DecimalTests.BigIntegerMul.Test()
[16:51:43.0372600]    at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
[16:51:43.0372690]    at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
[16:51:43.0390030] 2024-07-29 13:51:43.084 System.Runtime.Tests[36143:107068255] System.Tests.DecimalTests+BigIntegerMul 0.096197 ms
[16:51:43.0391760] 2024-07-29 13:51:43.085 System.Runtime.Tests[36143:107068255] 

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage":,
  "ErrorPattern": "(System\\.OutOfMemoryException : Insufficient memory to continue the execution of the program\\.)|(Assert\\.Equal\\(\\) Failure: -23057707503038771933 \\* -1)|(Assert\\.Equal\\(\\) Failure: -6773724285713928637\\.9 \\* 0\\.000000000000001533938174)",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Report

Build	Definition	Test	Pull Request
757260	dotnet/runtime	System.Tests.DecimalTests+BigIntegerAdd.Test

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	1

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=763399
Error message validated: [(System\.OutOfMemoryException : Insufficient memory to continue the execution of the program\.)|(Assert\.Equal\(\) Failure: -23057707503038771933 \* -1)|(Assert\.Equal\(\) Failure: -6773724285713928637\.9 \* 0\.000000000000001533938174)]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 8/7/2024 5:25:59 PM UTC

[dotnet-policy-service]

Tagging subscribers to 'os-ios': @vitek-karas, @kotlarmilos, @ivanpovazan, @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

[dotnet-policy-service]

Tagging subscribers to 'os-tvos': @vitek-karas, @kotlarmilos, @ivanpovazan, @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-runtime
See info in area-owners.md if you want to be subscribed.

[matouskozak]

No longer failing on rolling-builds.

[matouskozak]

Still occasionally failing, e.g. https://dev.azure.com/dnceng-public/public/_build/results?buildId=763399&view=results

[matouskozak]

There seems to be something off with fullAOT-llvm on Apple mobile. The failures are very occasional and coming from different BigInteger test. Fyi: @steveisok @vitek-karas

[vitek-karas]

@matouskozak Could you please create a separate issue for the functional failures - the title of this one talks just about OOM conditions which are probably much less of a problem. Computing wrong results is more serious problem.

[matouskozak]

Likely fixed by #106313