Disable GC/Scenarios/THDChaos/thdchaos test on Arm32 #122461

Copilot · 2025-12-11T18:48:12Z

Disables the GC/Scenarios/THDChaos/thdchaos test on Arm32 platforms due to test failures involving recursive OnUnhandledException calls leading to process termination.

Changes Made

Added exclusion for GC/Scenarios/THDChaos/thdchaos in the Arm32 section of src/tests/issues.targets
The exclusion applies to all Arm32 platforms (Windows and Unix) running CoreCLR
References issue Test failure: GC/Scenarios/THDChaos/thdchaos/thdchaos.cmd #119700

Testing

The test was failing on Arm32 CoreCLR with JIT stress configurations:

Platform: coreclr linux arm Checked jitstress2_jitstressregs0x80
Error: Recursive OnUnhandledException calls causing process termination

The change prevents the test from running on Arm32 architectures where it is known to fail, allowing other tests to complete successfully.

Original prompt

This section details on the original issue you should resolve

<issue_title>Test failure: GC/Scenarios/THDChaos/thdchaos/thdchaos.cmd</issue_title>
<issue_description>Failed in: runtime-coreclr jitstress2-jitstressregs 20250913.1

Failed tests:

coreclr linux arm Checked jitstress2_jitstressregs0x80 @ (Debian.13.Arm32.Open)Ubuntu.2204.ArmArch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:debian-13-helix-arm32v7
    - GC/Scenarios/THDChaos/thdchaos/thdchaos.cmd

Error message:

Process terminated.
OnUnhandledException called recursively
   at System.Environment.FailFast(System.Runtime.CompilerServices.StackCrawlMarkHandle, System.String, System.Runtime.CompilerServices.ObjectHandleOnStack, System.String)
   at System.Environment.FailFast(System.Threading.StackCrawlMark ByRef, System.String, System.Exception, System.String)
   at System.Environment.FailFast(System.String)
   at System.AppContext.OnUnhandledException(System.Object)
   at System.Runtime.EH.DispatchEx(System.Runtime.StackFrameIterator ByRef, ExInfo ByRef)
   at System.Runtime.EH.RhThrowEx(System.Object, ExInfo ByRef)
   at System.Threading.Thread.StartCore()
   at DefaultNamespace.LivingObject.ThreadStart()
   at System.Threading.Thread.StartCallback()
[createdump] Problem suspending thread: ptrace(ATTACH, 528) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 538) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 539) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 540) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 541) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 542) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 544) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 545) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 546) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 547) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 548) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 549) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 550) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 551) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 552) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 553) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 554) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 555) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 556) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 558) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 559) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 560) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 561) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 562) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 563) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 564) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 565) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 566) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 567) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 568) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 569) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 570) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 571) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 572) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 573) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 574) FAILED No such process (3)
[createdump] Problem suspending thread: ptrace(ATTACH, 580) FAILED No such process (3)
[createdump] Problem suspendi

Stack trace:

   at Xunit.Assert.True(Nullable`1 condition, String userMessage) in /_/src/arcade/src/Microsoft.DotNet.XUnitAssert/src/BooleanAsserts.cs:line 141
   at TestLibrary.OutOfProcessTest.RunOutOfProcessTest(String assemblyPath, String testPathPrefix)
   at Program.<<Main>$>g__TestExecutor49|0_50(StreamWriter tempLogSw, StreamWriter statsCsvSw, <>c__D...

</details>



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- Fixes dotnet/runtime#119700

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Co-authored-by: JulieLeeMSFT <63486087+JulieLeeMSFT@users.noreply.github.com>

jkotas

LGTM

Copilot

Pull request overview

This PR adds a test exclusion for the GC/Scenarios/THDChaos/thdchaos test on Arm32 platforms due to a test failure involving recursive unhandled exception calls and process termination. The test is experiencing failures specifically on Arm32 CoreCLR with JIT stress configurations.

Key Changes:

Adds exclusion entry for the THDChaos test in the Arm32 section of issues.targets

src/tests/issues.targets

Co-authored-by: jkotas <6668460+jkotas@users.noreply.github.com>

Initial plan

4c0e204

Copilot AI assigned Copilot and JulieLeeMSFT Dec 11, 2025

Copilot started work on behalf of JulieLeeMSFT December 11, 2025 18:48 View session

github-actions bot added the needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners label Dec 11, 2025

Disable thdchaos test on Arm32

99b0188

Co-authored-by: JulieLeeMSFT <63486087+JulieLeeMSFT@users.noreply.github.com>

jkotas approved these changes Dec 11, 2025

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jkotas marked this pull request as ready for review December 11, 2025 19:13

Copilot AI review requested due to automatic review settings December 11, 2025 19:13

Merge branch 'main' into copilot/fix-thdchaos-test-failure

a352e5f

Copilot started reviewing on behalf of jkotas December 11, 2025 19:14 View session

Copilot AI changed the title ~~[WIP] Fix test failure in GC/Scenarios/THDChaos~~ Disable GC/Scenarios/THDChaos/thdchaos test on Arm32 Dec 11, 2025

Copilot AI requested a review from JulieLeeMSFT December 11, 2025 19:15

Copilot finished work on behalf of JulieLeeMSFT December 11, 2025 19:15

Copilot AI reviewed Dec 11, 2025

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JulieLeeMSFT reviewed Dec 11, 2025

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src/tests/issues.targets Outdated Show resolved Hide resolved

Copilot started work on behalf of jkotas December 11, 2025 19:22 View session

Update issue reference to #119700

9770aa7

Co-authored-by: jkotas <6668460+jkotas@users.noreply.github.com>

Copilot AI requested a review from jkotas December 11, 2025 19:43

Copilot finished work on behalf of jkotas December 11, 2025 19:43

Copilot started work on behalf of JulieLeeMSFT December 11, 2025 19:43 View session

Copilot AI requested a review from JulieLeeMSFT December 11, 2025 20:04

Copilot finished work on behalf of JulieLeeMSFT December 11, 2025 20:04

JulieLeeMSFT approved these changes Dec 11, 2025

View reviewed changes

jkotas merged commit 30a5c7c into main Dec 11, 2025
81 checks passed

jkotas deleted the copilot/fix-thdchaos-test-failure branch December 11, 2025 23:25

dotnet-maestro bot mentioned this pull request Dec 13, 2025

[main] Source code updates from dotnet/runtime dotnet/dotnet#3873

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Disable GC/Scenarios/THDChaos/thdchaos test on Arm32 #122461

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Disable GC/Scenarios/THDChaos/thdchaos test on Arm32 #122461

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Copilot AI commented Dec 11, 2025 •

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