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Pull Request Overview
This PR fixes a potential reentrancy issue during Environment.FailFast execution and adds GC protection for a STRINGREF that could be moved during garbage collection.
- Adds GC protection around
pString->GetSString(result)to prevent the STRINGREF from being moved during potential GC triggers - Implements a reentrancy guard using
alreadyfailingcounter to prevent recursive exception message retrieval during FailFast handling
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
| src/coreclr/vm/excep.cpp | Adds GCPROTECT_BEGIN/END around GetSString call to protect STRINGREF from being moved during GC |
| src/coreclr/classlibnative/bcltype/system.cpp | Adds reentrancy counter to prevent calling GetExceptionMessage during nested FailFast calls |
jkotas
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Nov 3, 2025
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This was referenced Nov 3, 2025
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jkotas
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Nov 4, 2025
jkotas
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Nov 4, 2025
jkotas
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Nov 4, 2025
Co-authored-by: Jan Kotas <jkotas@microsoft.com>
Co-authored-by: Jan Kotas <jkotas@microsoft.com>
jkotas
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Nov 4, 2025
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/ba-g CI timeout - android helix |
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FailFastwe don't call managed code (which likely causes the recursive FailFast).Contributes to #121107