#include <stdio.h>
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
+#include <vector>
#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;
+ this->tid = t->get_id();
+ this->seq_number = model->get_next_seq_num();
+}
+
+ModelAction::~ModelAction()
+{
+ if (cv)
+ delete cv;
+}
+
+void ModelAction::copy_from_new(ModelAction *newaction) {
+ seq_number=newaction->seq_number;
+}
+
+bool ModelAction::is_mutex_op() const {
+ return type == ATOMIC_LOCK || type == ATOMIC_TRYLOCK || type == ATOMIC_UNLOCK;
+}
+
+bool ModelAction::is_lock() const {
+ return type == ATOMIC_LOCK;
+}
+
+bool ModelAction::is_unlock() const {
+ return type == ATOMIC_UNLOCK;
+}
+
+bool ModelAction::is_trylock() const {
+ return type == ATOMIC_TRYLOCK;
+}
+
+bool ModelAction::is_success_lock() const {
+ return type == ATOMIC_LOCK || (type == ATOMIC_TRYLOCK && value == VALUE_TRYSUCCESS);
+}
+
+bool ModelAction::is_failed_trylock() const {
+ return (type == ATOMIC_TRYLOCK && value == VALUE_TRYFAILED);
+}
+
+bool ModelAction::is_read() const
+{
+ return type == ATOMIC_READ || type == ATOMIC_RMWR || type == ATOMIC_RMW;
+}
+
+bool ModelAction::is_write() const
+{
+ return type == ATOMIC_WRITE || type == ATOMIC_RMW || type == ATOMIC_INIT;
+}
- 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();
+bool ModelAction::is_rmwr() const
+{
+ return type == ATOMIC_RMWR;
+}
+
+bool ModelAction::is_rmw() const
+{
+ return type == ATOMIC_RMW;
+}
+
+bool ModelAction::is_rmwc() const
+{
+ return type == ATOMIC_RMWC;
}
-bool ModelAction::is_read()
+bool ModelAction::is_fence() const
{
- return type == ATOMIC_READ;
+ return type == ATOMIC_FENCE;
}
-bool ModelAction::is_write()
+bool ModelAction::is_initialization() const
{
- return type == ATOMIC_WRITE;
+ return type == ATOMIC_INIT;
}
-bool ModelAction::is_acquire()
+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::same_var(ModelAction *act)
+bool ModelAction::is_seqcst() const
{
- return true;
- // TODO: fix stack allocation... return location == act->location;
+ return order==std::memory_order_seq_cst;
+}
+
+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;
}
-bool ModelAction::is_dependent(ModelAction *act)
+void ModelAction::copy_typeandorder(ModelAction * act) {
+ this->type=act->type;
+ this->order=act->order;
+}
+
+/** This method changes an existing read part of an RMW action into either:
+ * (1) a full RMW action in case of the completed write or
+ * (2) a READ action in case a failed action.
+ * @todo If the memory_order changes, we may potentially need to update our
+ * clock vector.
+ */
+void ModelAction::process_rmw(ModelAction * act) {
+ this->order=act->order;
+ if (act->is_rmwc())
+ this->type=ATOMIC_READ;
+ else if (act->is_rmw()) {
+ this->type=ATOMIC_RMW;
+ 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.
+ * Other memory operations will be dealt with by using the reads_from
+ * relation.
+ *
+ * @param act is the action to consider exploring a reordering.
+ * @return tells whether we have to explore a reordering.
+ */
+bool ModelAction::is_synchronizing(const ModelAction *act) const
{
- if (!is_read() && !is_write())
+ //Same thread can't be reordered
+ if (same_thread(act))
return false;
- if (!act->is_read() && !act->is_write())
+
+ // Different locations commute
+ if (!same_var(act))
return false;
- if (same_var(act) && !same_thread(act) &&
- (is_write() || act->is_write()))
+
+ // 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 true;
+
+ // Explore synchronizing read/write pairs
+ if (is_read() && is_acquire() && act->is_write() && act->is_release())
+ return true;
+ if (is_write() && is_release() && act->is_read() && act->is_acquire())
+ return true;
+
+ // Otherwise handle by reads_from relation
return false;
}
-void ModelAction::print(void)
+bool ModelAction::is_conflicting_lock(const ModelAction *act) const
{
- const char *type_str;
+ //Must be different threads to reorder
+ if (same_thread(act))
+ return false;
+
+ //Try to reorder a lock past a successful lock
+ if (act->is_success_lock())
+ return true;
+
+ //Try to push a successful trylock past an unlock
+ if (act->is_unlock() && is_trylock() && value == VALUE_TRYSUCCESS)
+ return true;
+
+ return false;
+}
+
+void ModelAction::create_cv(const ModelAction *parent)
+{
+ if (cv)
+ delete cv;
+
+ if (parent)
+ cv = new ClockVector(parent->cv, this);
+ else
+ cv = new ClockVector(NULL, this);
+}
+
+void ModelAction::set_try_lock(bool obtainedlock) {
+ if (obtainedlock)
+ value=VALUE_TRYSUCCESS;
+ else
+ value=VALUE_TRYFAILED;
+}
+
+/** Update the model action's read_from action */
+void ModelAction::read_from(const ModelAction *act)
+{
+ ASSERT(cv);
+ reads_from = act;
+ if (act != NULL && this->is_acquire()) {
+ rel_heads_list_t release_heads;
+ model->get_release_seq_heads(this, &release_heads);
+ for (unsigned int i = 0; i < release_heads.size(); i++)
+ synchronize_with(release_heads[i]);
+ }
+}
+
+/**
+ * Synchronize the current thread with the thread corresponding to the
+ * ModelAction parameter.
+ * @param act The ModelAction to synchronize with
+ * @return True if this is a valid synchronization; false otherwise
+ */
+bool ModelAction::synchronize_with(const ModelAction *act) {
+ if (*this < *act && type != THREAD_JOIN && type != ATOMIC_LOCK)
+ return false;
+ model->check_promises(cv, act->cv);
+ cv->merge(act->cv);
+ return true;
+}
+
+bool ModelAction::has_synchronized_with(const ModelAction *act) const
+{
+ return cv->has_synchronized_with(act->cv);
+}
+
+/**
+ * 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) const
+{
+ const char *type_str, *mo_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 THREAD_JOIN:
type_str = "thread join";
break;
+ case THREAD_FINISH:
+ type_str = "thread finish";
+ break;
case ATOMIC_READ:
type_str = "atomic read";
break;
case ATOMIC_WRITE:
type_str = "atomic write";
break;
+ case ATOMIC_RMW:
+ type_str = "atomic rmw";
+ break;
+ case ATOMIC_FENCE:
+ type_str = "fence";
+ break;
+ case ATOMIC_RMWR:
+ type_str = "atomic rmwr";
+ break;
+ case ATOMIC_RMWC:
+ type_str = "atomic rmwc";
+ break;
+ case ATOMIC_INIT:
+ type_str = "init atomic";
+ break;
+ case ATOMIC_LOCK:
+ type_str = "lock";
+ break;
+ case ATOMIC_UNLOCK:
+ type_str = "unlock";
+ break;
+ case ATOMIC_TRYLOCK:
+ type_str = "trylock";
+ break;
default:
type_str = "unknown type";
}
- printf("(%4d) Thread: %d\tAction: %s\tMO: %d\tLoc: %14p\tValue: %d\n",
- seq_number, id_to_int(tid), type_str, order, location, value);
+ uint64_t valuetoprint=type==ATOMIC_READ?(reads_from!=NULL?reads_from->value:VALUE_NONE):value;
+
+ switch (this->order) {
+ case std::memory_order_relaxed:
+ mo_str = "relaxed";
+ break;
+ case std::memory_order_acquire:
+ mo_str = "acquire";
+ break;
+ case std::memory_order_release:
+ mo_str = "release";
+ break;
+ case std::memory_order_acq_rel:
+ mo_str = "acq_rel";
+ break;
+ case std::memory_order_seq_cst:
+ mo_str = "seq_cst";
+ break;
+ default:
+ mo_str = "unknown";
+ break;
+ }
+
+ printf("(%3d) Thread: %-2d Action: %-13s MO: %7s Loc: %14p Value: %-12" PRIu64,
+ seq_number, id_to_int(tid), type_str, mo_str, location, valuetoprint);
+ if (is_read()) {
+ if (reads_from)
+ printf(" Rf: %d", reads_from->get_seq_number());
+ else
+ printf(" Rf: ?");
+ }
+ if (cv) {
+ printf("\t");
+ cv->print();
+ } else
+ printf("\n");
}
projects / c11tester.git / blobdiff