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std: align(16) main_thread_tls_buffer

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Before this change, thread local variables were landmines if LLVM
decided to optimize any writes to them using vector instructions.
This commit is contained in:
Andrew Kelley 2020-12-17 22:40:53 -07:00
parent 9b86dde7b9
commit ad05509930
1 changed files with 1 additions and 1 deletions
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2
lib/std/os/linux/tls.zig
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@ -327,7 +327,7 @@ pub fn prepareTLS(area: []u8) usize {
if (tls_tp_points_past_tcb) tls_image.data_offset else tls_image.tcb_offset; if (tls_tp_points_past_tcb) tls_image.data_offset else tls_image.tcb_offset;
} }
var main_thread_tls_buffer: [256]u8 = undefined; var main_thread_tls_buffer: [256]u8 align(16) = undefined;
pub fn initStaticTLS() void { pub fn initStaticTLS() void {
initTLS(); initTLS();