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Fix test89834 SIGBUS on macOS ARM64 - #135547
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[WIP] Fix test failure in GitHub_89834 test89834 script
Investigate test89834 SIGBUS on macOS ARM64
Oct 9, 2026
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
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The root cause identified by #135404 (comment) is duplicate of some of the other GC holes issues we are hitting (discussed at #135415 (comment)). It should be fixed by changing CORINFO_HELP_BULK_WRITEBARRIER_SMALL definition in jithelpers.h to use unmanaged entrypoint, like |
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cc @EgorBo |
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
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Oct 12, 2026
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Oct 13, 2026
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LGTM otherwise |
Co-authored-by: Jan Kotas <jkotas@microsoft.com>
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October 13, 2026 16:20
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/ba-g opened #135717 on the build error |
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test89834terminates with SIGBUS under checked macOS ARM64 GC/JIT stress, returning 138 instead of 100 before any first-chance callback output. The evidence points to a GC hole in CORINFO_HELP_BULK_WRITEBARRIER_SMALL: the helper is classified as non-GC, but its first call can enter the prestub and trigger a collection.Fixes #135404