#include <stdio.h>
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
#include "model.h"
#include "action.h"
#include "clockvector.h"
#include "common.h"
-ModelAction::ModelAction(action_type_t type, memory_order order, void *loc, int value)
+ModelAction::ModelAction(action_type_t type, memory_order order, void *loc, uint64_t value) :
+ type(type),
+ order(order),
+ location(loc),
+ value(value),
+ reads_from(NULL),
+ cv(NULL)
{
Thread *t = thread_current();
- ModelAction *act = this;
-
- act->type = type;
- act->order = order;
- act->location = loc;
- act->tid = t->get_id();
- act->value = value;
- act->seq_number = model->get_next_seq_num();
-
- cv = NULL;
+ this->tid = t->get_id();
+ this->seq_number = model->get_next_seq_num();
}
ModelAction::~ModelAction()
delete cv;
}
-bool ModelAction::is_read()
+bool ModelAction::is_read() const
{
- return type == ATOMIC_READ;
+ return type == ATOMIC_READ || type == ATOMIC_RMW;
}
-bool ModelAction::is_write()
+bool ModelAction::is_write() const
{
- return type == ATOMIC_WRITE;
+ return type == ATOMIC_WRITE || type == ATOMIC_RMW || type == ATOMIC_INIT;
}
-bool ModelAction::is_rmw()
+bool ModelAction::is_rmw() const
{
return type == ATOMIC_RMW;
}
-bool ModelAction::is_acquire()
+bool ModelAction::is_initialization() const
+{
+ return type == ATOMIC_INIT;
+}
+
+bool ModelAction::is_acquire() const
{
switch (order) {
- case memory_order_acquire:
- case memory_order_acq_rel:
- case memory_order_seq_cst:
+ case std::memory_order_acquire:
+ case std::memory_order_acq_rel:
+ case std::memory_order_seq_cst:
return true;
default:
return false;
}
}
-bool ModelAction::is_release()
+bool ModelAction::is_release() const
{
switch (order) {
- case memory_order_release:
- case memory_order_acq_rel:
- case memory_order_seq_cst:
+ case std::memory_order_release:
+ case std::memory_order_acq_rel:
+ case std::memory_order_seq_cst:
return true;
default:
return false;
}
}
-bool ModelAction::is_seqcst()
+bool ModelAction::is_seqcst() const
{
- return order==memory_order_seq_cst;
+ return order==std::memory_order_seq_cst;
}
-bool ModelAction::same_var(ModelAction *act)
+bool ModelAction::same_var(const ModelAction *act) const
{
return location == act->location;
}
-bool ModelAction::same_thread(ModelAction *act)
+bool ModelAction::same_thread(const ModelAction *act) const
{
return tid == act->tid;
}
+void ModelAction::upgrade_rmw(ModelAction * act) {
+ ASSERT(is_read());
+ ASSERT(act->is_rmw());
+ //Upgrade our type to the act's type
+ this->type=act->type;
+ this->order=act->order;
+ this->value=act->value;
+}
+
/** The is_synchronizing method should only explore interleavings if:
* (1) the operations are seq_cst and don't commute or
* (2) the reordering may establish or break a synchronization relation.
* @return tells whether we have to explore a reordering.
*/
-bool ModelAction::is_synchronizing(ModelAction *act)
+bool ModelAction::is_synchronizing(const ModelAction *act) const
{
//Same thread can't be reordered
if (same_thread(act))
// Different locations commute
if (!same_var(act))
return false;
-
+
// Explore interleavings of seqcst writes to guarantee total order
// of seq_cst operations that don't commute
if (is_write() && is_seqcst() && act->is_write() && act->is_seqcst())
return false;
}
-void ModelAction::create_cv(ModelAction *parent)
+void ModelAction::create_cv(const ModelAction *parent)
{
- if (cv)
- return;
+ ASSERT(cv == NULL);
if (parent)
cv = new ClockVector(parent->cv, this);
cv = new ClockVector(NULL, this);
}
-void ModelAction::read_from(ModelAction *act)
+void ModelAction::read_from(const ModelAction *act)
{
ASSERT(cv);
if (act->is_release() && this->is_acquire())
cv->merge(act->cv);
- value = act->value;
+ reads_from = act;
+}
+
+/**
+ * Check whether 'this' happens before act, according to the memory-model's
+ * happens before relation. This is checked via the ClockVector constructs.
+ * @return true if this action's thread has synchronized with act's thread
+ * since the execution of act, false otherwise.
+ */
+bool ModelAction::happens_before(const ModelAction *act) const
+{
+ return act->cv->synchronized_since(this);
}
-void ModelAction::print(void)
+void ModelAction::print(void) const
{
const char *type_str;
switch (this->type) {
case THREAD_CREATE:
type_str = "thread create";
break;
+ case THREAD_START:
+ type_str = "thread start";
+ break;
case THREAD_YIELD:
type_str = "thread yield";
break;
case ATOMIC_RMW:
type_str = "atomic rmw";
break;
+ case ATOMIC_INIT:
+ type_str = "init atomic";
+ break;
default:
type_str = "unknown type";
}
- printf("(%3d) Thread: %-2d Action: %-13s MO: %d Loc: %14p Value: %d",
- seq_number, id_to_int(tid), type_str, order, location, value);
+ uint64_t valuetoprint=type==ATOMIC_READ?reads_from->value:value;
+
+ printf("(%3d) Thread: %-2d Action: %-13s MO: %d Loc: %14p Value: %-12" PRIu64,
+ seq_number, id_to_int(tid), type_str, order, location, valuetoprint);
+ if (reads_from)
+ printf(" Rf: %d", reads_from->get_seq_number());
if (cv) {
printf("\t");
cv->print();