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[release/9.0-staging] Fix calling convention mismatch in GC callouts#111105

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@github-actionsgithub-actionsbot commentedJan 6, 2025
edited by AaronRobinsonMSFT
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Backport of#110685 to release/9.0-staging

/cc@AaronRobinsonMSFT@MichalStrehovsky

Customer Impact

  • Customer reported
  • Found internally

The GC will crash in .NET 9 when published with native AOT onwin-x86. A GC callback was defined with an incorrect calling convention. This was reported by a customer -#110607.

Related servicing issue:#110815

Regression

  • Yes
  • No

Support for x86_32 was introduced in .NET 9.

Testing

Validated this with the help of Windows Store owners.

Risk

Low

Fixes#110607.The native side expects fastcall.Filed#110684 on the test hole. We would have caught it during x86 bringup if this had _any_ tests since this is a guaranteed stack corruption and crash.
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Tagging subscribers to this area:@agocke,@MichalStrehovsky,@jkotas
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@AaronRobinsonMSFTAaronRobinsonMSFT added the Servicing-considerIssue for next servicing release review labelJan 6, 2025
@AaronRobinsonMSFTAaronRobinsonMSFT added this to the9.0.x milestoneJan 6, 2025
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lgtm. we will take for consideration in 9.0.x

@jeffschwMSFTjeffschwMSFT added Servicing-approvedApproved for servicing release and removed Servicing-considerIssue for next servicing release review labelsJan 8, 2025
@jeffschwMSFTjeffschwMSFT modified the milestones:9.0.x,9.0.2Jan 8, 2025
@jeffschwMSFTjeffschwMSFT merged commit7a95474 intorelease/9.0-stagingJan 8, 2025
10 of 16 checks passed
@jkotasjkotas deleted the backport/pr-110685-to-release/9.0-staging branchJanuary 8, 2025 19:37
@github-actionsgithub-actionsbot locked and limited conversation to collaboratorsFeb 8, 2025
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@jkotasjkotasjkotas approved these changes

@jeffschwMSFTjeffschwMSFTjeffschwMSFT approved these changes

@AaronRobinsonMSFTAaronRobinsonMSFTAaronRobinsonMSFT approved these changes

@MichalStrehovskyMichalStrehovskyAwaiting requested review from MichalStrehovskyMichalStrehovsky is a code owner

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@jkotas@jeffschwMSFT@AaronRobinsonMSFT@MichalStrehovsky

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