stackoverflowtester Exit code: 0x0000008B, expected 0x00000086

[MichalStrehovsky]

Return code:      1
Raw output file:      /root/helix/work/workitem/uploads/stackoverflow/stackoverflowtester/output.txt
Raw output:
BEGIN EXECUTION
/root/helix/work/correlation/corerun -p System.Reflection.Metadata.MetadataUpdater.IsSupported=false -p System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization=true stackoverflowtester.dll ''
Running stackoverflow test(smallframe main)
"Stack overflow."
"Repeated 174596 times:"
"--------------------------------"
"   at TestStackOverflow.Program.InfiniteRecursionC()"
"   at TestStackOverflow.Program.InfiniteRecursionB()"
"   at TestStackOverflow.Program.InfiniteRecursionA()"
"--------------------------------"
"   at TestStackOverflow.Program.Test(Boolean)"
"   at TestStackOverflow.Program.Main(System.String[])"
"@Exiting stack trace printing thread."
"@Stack trace printing helper thread exited."
"@Proceeding with exit."
"@Setting throwable."
"@Calling WatsonLastChance."
"@Terminating the process."
""
Running stackoverflow test(largeframe main)
"Stack overflow."
"Repeated 42 times:"
"--------------------------------"
"   at TestStackOverflow.Program.InfiniteRecursionB2()"
"   at TestStackOverflow.Program.InfiniteRecursionA2()"
"   at TestStackOverflow.Program.InfiniteRecursionC2()"
"--------------------------------"
"   at TestStackOverflow.Program.InfiniteRecursionB2()"
"   at TestStackOverflow.Program.InfiniteRecursionA2()"
"   at TestStackOverflow.Program.Test(Boolean)"
"   at TestStackOverflow.Program.Main(System.String[])"
"@Exiting stack trace printing thread."
""
System.Exception: Exit code: 0x0000008B, expected 0x00000086
   at TestStackOverflow.Program.TestStackOverflow(String testName, String testArgs, List`1& stderrLines)
   at TestStackOverflow.Program.TestStackOverflowLargeFrameMainThread()
   at __GeneratedMainWrapper.Main()
Expected: 100
Actual: 101

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1365267
Build error leg or test failing: baseservices/exceptions/stackoverflow/stackoverflowtester/stackoverflowtester.cmd
Pull request: #126498

Error Message

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

{
  "ErrorMessage": ["Running stackoverflow test(smallframe main)", "Exit code: 0x0000008B, expected 0x00000086"],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1365267
Error message validated: [Running stackoverflow test(smallframe main) Exit code: 0x0000008B, expected 0x00000086]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/3/2026 1:07:40 PM UTC

Report

Build	Definition	Test	Pull Request
1365664	dotnet/runtime	baseservices/exceptions/stackoverflow/stackoverflowtester/stackoverflowtester.cmd
1365400	dotnet/runtime	baseservices/exceptions/stackoverflow/stackoverflowtester/stackoverflowtester.cmd	#126499
1365267	dotnet/runtime	baseservices/exceptions/stackoverflow/stackoverflowtester/stackoverflowtester.cmd	#126498

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
3	3	3

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[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• Test failure: baseservices/exceptions/stackoverflow/stackoverflowtester/stackoverflowtester.cmd #110173
• Test failure baseservices\\exceptions\\stackoverflow\\stackoverflowtester\\stackoverflowtester.cmd #84911

[MichalStrehovsky]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

I thought it's that one too. But not a timeout.

[mangod9]

failure analysis:

Issue #126502 — Complete Diagnosis

  Immediate Cause: Missing Architecture.Arm in test skip

  In stackoverflowtester.cs, the main thread largeframe test (line 126) skips for
  Arm64|X64|RiscV64|LoongArch64 on Unix but omits ARM32. The secondary thread version (line
  202) correctly includes Architecture.Arm.

  Why SIGSEGV instead of SIGABRT

   - Largeframe methods allocate 65,536 bytes per frame via nested LargeStruct65536
   - ARM32 JIT probes stack pages without moving SP
   - Guard page fault address is >8KB from SP → runtime's 2-page detection window in
  signal.cpp:679 misses it
   - SIGSEGV (exit 139) instead of expected SIGABRT (exit 134)

  Fix

  Add Architecture.Arm to line 126-127, matching the secondary thread version at line 201-202.

  Related

   - #110173 — Main tracker (assigned @janvorli), 8+ ARM32 hits in recent months
   - #107184 — ARM32 EHABI unwind limitations
   - #13519 — Stack probing doesn't move SP
   - Not a regression — pre-existing ARM32 limitation with inconsistent skip