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don't use the new __builtin_thread_pointer on macOS

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Daan 2024-03-02 14:06:34 -08:00
parent 3966953b7f
commit dfb5cadf33
1 changed files with 2 additions and 1 deletions
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include/mimalloc/prim.h
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@ -213,11 +213,12 @@ static inline mi_threadid_t _mi_prim_thread_id(void) mi_attr_noexcept {
}
#elif defined(__has_builtin) && __has_builtin(__builtin_thread_pointer) && \
(!defined(__APPLE__)) && /* on apple (M1) the wrong register is read (tpidr_el0 instead of tpidrro_el0) so fall back to TLS slot assembly (<https://github.com/microsoft/mimalloc/issues/343#issuecomment-763272369>)*/ \
(!defined(__clang_major__) || __clang_major__ >= 14) // older clang versions emit bad code; fall back to using the TLS slot (<https://lore.kernel.org/linux-arm-kernel/202110280952.352F66D8@keescook/T/>)
static inline mi_threadid_t _mi_prim_thread_id(void) mi_attr_noexcept {
// Works on most Unix based platforms
return (uintptr_t)__builtin_thread_pointer();
return (uintptr_t)__builtin_thread_pointer();
}
#elif defined(MI_HAS_TLS_SLOT)