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impatomic: add strong/weak compare_exchange
[model-checker.git]
/
action.cc
diff --git
a/action.cc
b/action.cc
index 3aeb7377e2b328fad8b24748744274ab1386e25d..ca1285612b00c75fd7294bee5af80d3aa52a3468 100644
(file)
--- a/
action.cc
+++ b/
action.cc
@@
-7,7
+7,7
@@
#include "action.h"
#include "clockvector.h"
#include "common.h"
#include "action.h"
#include "clockvector.h"
#include "common.h"
-#include "threads.h"
+#include "threads
-model
.h"
#include "nodestack.h"
#define ACTION_INITIAL_CLOCK 0
#include "nodestack.h"
#define ACTION_INITIAL_CLOCK 0
@@
-36,6
+36,9
@@
ModelAction::ModelAction(action_type_t type, memory_order order, void *loc,
cv(NULL),
sleep_flag(false)
{
cv(NULL),
sleep_flag(false)
{
+ /* References to NULL atomic variables can end up here */
+ ASSERT(loc || type == MODEL_FIXUP_RELSEQ);
+
Thread *t = thread ? thread : thread_current();
this->tid = t->get_id();
}
Thread *t = thread ? thread : thread_current();
this->tid = t->get_id();
}
@@
-111,6
+114,11
@@
bool ModelAction::is_write() const
return type == ATOMIC_WRITE || type == ATOMIC_RMW || type == ATOMIC_INIT;
}
return type == ATOMIC_WRITE || type == ATOMIC_RMW || type == ATOMIC_INIT;
}
+bool ModelAction::could_be_write() const
+{
+ return is_write() || is_rmwr();
+}
+
bool ModelAction::is_rmwr() const
{
return type == ATOMIC_RMWR;
bool ModelAction::is_rmwr() const
{
return type == ATOMIC_RMWR;
@@
-217,11
+225,11
@@
bool ModelAction::could_synchronize_with(const ModelAction *act) const
// Explore interleavings of seqcst writes to guarantee total order
// of seq_cst operations that don't commute
// Explore interleavings of seqcst writes to guarantee total order
// of seq_cst operations that don't commute
- if ((
is_write() || act->is
_write()) && is_seqcst() && act->is_seqcst())
+ if ((
could_be_write() || act->could_be
_write()) && is_seqcst() && act->is_seqcst())
return true;
// Explore synchronizing read/write pairs
return true;
// Explore synchronizing read/write pairs
- if (is_read() && is_acquire() && act->
is
_write() && act->is_release())
+ if (is_read() && is_acquire() && act->
could_be
_write() && act->is_release())
return true;
// Otherwise handle by reads_from relation
return true;
// Otherwise handle by reads_from relation