internal/bytealg: add MTE-safe IndexByte implementation for ARM64 iOS#18
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hbrooks wants to merge 2 commits into
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internal/bytealg: add MTE-safe IndexByte implementation for ARM64 iOS#18hbrooks wants to merge 2 commits into
hbrooks wants to merge 2 commits into
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Add optimized ARM64 implementation of IndexByte and IndexByteString for iOS that never reads before string start or beyond end, making it MTE-safe. Also extend the findnull fallback to iOS since it may use ARM64 with restrictions similar to Plan 9. Includes comprehensive tests for different SIMD code paths and alignments.
The current implementation accesses memory beyond the slice bounds, which triggers Memory Tagging Extension (MTE) violations on iOS arm64. Use a safer approach that only accesses tagged memory regions.
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Mirror of golang/go#77915 by @strimziUser