33 lines
452 B
Plaintext
33 lines
452 B
Plaintext
C SB+rfionceonce-poonceonces
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(*
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* Result: Sometimes
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*
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* This litmus test demonstrates that LKMM is not fully multicopy atomic.
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*)
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{}
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P0(int *x, int *y)
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{
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int r1;
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int r2;
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WRITE_ONCE(*x, 1);
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r1 = READ_ONCE(*x);
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r2 = READ_ONCE(*y);
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}
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P1(int *x, int *y)
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{
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int r3;
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int r4;
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WRITE_ONCE(*y, 1);
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r3 = READ_ONCE(*y);
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r4 = READ_ONCE(*x);
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}
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locations [0:r1; 1:r3; x; y] (* Debug aid: Print things not in "exists". *)
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exists (0:r2=0 /\ 1:r4=0)
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