[release/5.0] Use minimum supported PAGE_SIZE as stack probe step#45226
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echesakov wants to merge 1 commit intodotnet:release/5.0from
Closed
[release/5.0] Use minimum supported PAGE_SIZE as stack probe step#45226echesakov wants to merge 1 commit intodotnet:release/5.0from
echesakov wants to merge 1 commit intodotnet:release/5.0from
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sdmaclea
approved these changes
Nov 25, 2020
6 tasks
BruceForstall
approved these changes
Nov 25, 2020
Contributor
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Apple has indicated this issue only affects the Apple Silicon DTK and is fixed on M1 commercial hardware running under Rosetta. Closing this PR. |
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Backport of #45225 to release/5.0
Customer Impact
Apple Silicon with Rosetta 2 emulation uses a 16K memory page. This configuration sends the runtime into untested and unstable stack probing configuration which causes crashes in Rosetta 2 emulation. We need this fixed to support Apple Silicon.
Regression
No. Apple Silicon is a new scenario which we are backporting to .NET 5
Testing
Risk
This is a low risk change. It changes stack probing to use a constant 4k page size. This is the industry standard minimum page size used across all supported CPU architectures. The use of a constant reduces complexity and simplifies testing. Fixes issues with mismatched AOT and runtime page sizes.
@dotnet/jit-contrib
cc @sdmaclea