From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- .../WRC+pooncerelease+fencermbonceonce+Once.litmus | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus (limited to 'tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus') diff --git a/tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus b/tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus new file mode 100644 index 000000000..e9947250d --- /dev/null +++ b/tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus @@ -0,0 +1,38 @@ +C WRC+pooncerelease+fencermbonceonce+Once + +(* + * Result: Never + * + * This litmus test is an extension of the message-passing pattern, where + * the first write is moved to a separate process. Because it features + * a release and a read memory barrier, it should be forbidden. More + * specifically, this litmus test is forbidden because smp_store_release() + * is A-cumulative in LKMM. + *) + +{} + +P0(int *x) +{ + WRITE_ONCE(*x, 1); +} + +P1(int *x, int *y) +{ + int r0; + + r0 = READ_ONCE(*x); + smp_store_release(y, 1); +} + +P2(int *x, int *y) +{ + int r0; + int r1; + + r0 = READ_ONCE(*y); + smp_rmb(); + r1 = READ_ONCE(*x); +} + +exists (1:r0=1 /\ 2:r0=1 /\ 2:r1=0) -- cgit v1.2.3