cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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MP+poonceonces.litmus (386B)

      1C MP+poonceonces
      2
      3(*
      4 * Result: Sometimes
      5 *
      6 * Can the counter-intuitive message-passing outcome be prevented with
      7 * no ordering at all?
      8 *)
      9
     10{}
     11
     12P0(int *buf, int *flag) // Producer
     13{
     14	WRITE_ONCE(*buf, 1);
     15	WRITE_ONCE(*flag, 1);
     16}
     17
     18P1(int *buf, int *flag) // Consumer
     19{
     20	int r0;
     21	int r1;
     22
     23	r0 = READ_ONCE(*flag);
     24	r1 = READ_ONCE(*buf);
     25}
     26
     27exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *)