Test rcu-heuristics-failure

LISA rcu-heuristics-failure.litmus
(*
 * Result: Maybe
 *
 * Should be forbidden, but allowed by kernel-alan
 *)
{
}
 P0  | P1       | P2           | P3    ;
 w[once] x1 1 | f[rcu_read_lock]   | f[rcu_read_lock]   | w[once] y1 1  ;
 f[sync]    | w[once] y3 1      | w[once] x3 1   | f[sync]      ;
 r[once] r2 x2 | f[rcu_read_unlock] | f[rcu_read_unlock] | r[once] r2 y2 ;
  | w[once] y2 1      | w[once] x2 1   |    ;
  | r[once] r3 x3      | r[once] r3 y3   |    ;
  | r[once] r1 x1      | r[once] r1 y1   |    ;
Observed
    3:r2=0; 2:r3=1; 2:r1=1; 1:r3=1; 1:r1=1; 0:r2=1;
and 3:r2=0; 2:r3=1; 2:r1=0; 1:r3=1; 1:r1=1; 0:r2=1;
and 3:r2=0; 2:r3=1; 2:r1=1; 1:r3=1; 1:r1=0; 0:r2=1;
and 3:r2=0; 2:r3=1; 2:r1=1; 1:r3=0; 1:r1=0; 0:r2=1;
and 3:r2=0; 2:r3=1; 2:r1=1; 1:r3=1; 1:r1=1; 0:r2=0;
and 3:r2=1; 2:r3=1; 2:r1=0; 1:r3=1; 1:r1=1; 0:r2=0;
and 3:r2=0; 2:r3=0; 2:r1=1; 1:r3=0; 1:r1=1; 0:r2=0;
and 3:r2=0; 2:r3=1; 2:r1=1; 1:r3=0; 1:r1=0; 0:r2=0;