Invalidate CPU I-cache on Apple Silicon #259
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This issue keeps coming up a lot. Just a reminder (for future reference): we're already using the gcc/clang __builtin___clear_cache() and on MacOS that is simply a call to sys_icache_invalidate(). So the real question to answer is, do we have enough of those __builtin___clear_cache() invocations, in the right places? Example clang implementation: https://codebrowser.dev/llvm/compiler-rt/lib/builtins/clear_cache.c.html |
hyc
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Nov 30, 2022
Call __builtin___clear_cache() after pthread_jit_write_protect_np() according to https://developer.apple.com/documentation/apple-silicon/porting-just-in-time-compilers-to-apple-silicon
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hyc
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Call sys_icache_invalidate() after pthread_jit_write_protect_np() according to https://developer.apple.com/documentation/apple-silicon/porting-just-in-time-compilers-to-apple-silicon