model: schedule appropriate fence backtracking points

[c11tester.git] / action.cc

diff --git a/action.cc b/action.cc
index 13da2b96312f0ee9c524b04fb13f0fcc997697b5..317c6a7cd87d9a94fbb695ecb95615ed5bae5613 100644 (file)
--- a/action.cc
+++ b/action.cc
@@ -31,6 +31,7 @@ ModelAction::ModelAction(action_type_t type, memory_order order, void *loc,
        location(loc),
        value(value),
        reads_from(NULL),
+       reads_from_promise(NULL),
        last_fence_release(NULL),
        node(NULL),
        seq_number(ACTION_INITIAL_CLOCK),
@@ -252,10 +253,11 @@ void ModelAction::copy_typeandorder(ModelAction * act)
  */
 Thread * ModelAction::get_thread_operand() const
 {
-       if (type == THREAD_CREATE)
-               /* THREAD_CREATE uses (Thread *) for location */
-               return (Thread *)get_location();
-       else if (type == THREAD_JOIN)
+       if (type == THREAD_CREATE) {
+               /* THREAD_CREATE stores its (Thread *) in a thrd_t::priv */
+               thrd_t *thrd = (thrd_t *)get_location();
+               return thrd->priv;
+       } else if (type == THREAD_JOIN)
                /* THREAD_JOIN uses (Thread *) for location */
                return (Thread *)get_location();
        else
@@ -298,15 +300,13 @@ bool ModelAction::could_synchronize_with(const ModelAction *act) const
        if (!same_var(act))
                return false;
 
-       // Explore interleavings of seqcst writes/fences to guarantee total
+       // Explore interleavings of seqcst writes to guarantee total
        // order of seq_cst operations that don't commute
-       if ((could_be_write() || act->could_be_write() || is_fence() || act->is_fence())
-                       && is_seqcst() && act->is_seqcst())
+       if ((could_be_write() || act->could_be_write()) && is_seqcst() && act->is_seqcst())
                return true;
 
-       // Explore synchronizing read/write/fence pairs
-       if (is_acquire() && act->is_release() && (is_read() || is_fence()) &&
-                       (act->could_be_write() || act->is_fence()))
+       // Explore synchronizing read/write pairs
+       if (is_acquire() && act->is_release() && is_read() && act->could_be_write())
                return true;
 
        // lock just released...we can grab lock
@@ -510,8 +510,10 @@ void ModelAction::print() const
        }
 
        uint64_t valuetoprint;
-       if (type == ATOMIC_READ && reads_from != NULL)
+       if (is_read() && reads_from)
                valuetoprint = reads_from->value;
+       else if (is_read() && reads_from_promise)
+               valuetoprint = reads_from_promise->get_value();
        else
                valuetoprint = value;