2 #define __STDC_FORMAT_MACROS
7 #include "clockvector.h"
10 ModelAction::ModelAction(action_type_t type, memory_order order, void *loc, uint64_t value) :
18 Thread *t = thread_current();
19 this->tid = t->get_id();
20 this->seq_number = model->get_next_seq_num();
23 ModelAction::~ModelAction()
29 bool ModelAction::is_read() const
31 return type == ATOMIC_READ || type == ATOMIC_RMWR || type == ATOMIC_RMW;
34 bool ModelAction::is_write() const
36 return type == ATOMIC_WRITE || type == ATOMIC_RMW || type == ATOMIC_INIT;
39 bool ModelAction::is_rmwr() const
41 return type == ATOMIC_RMWR;
44 bool ModelAction::is_rmw() const
46 return type == ATOMIC_RMW;
49 bool ModelAction::is_rmwc() const
51 return type == ATOMIC_RMWC;
54 bool ModelAction::is_initialization() const
56 return type == ATOMIC_INIT;
59 bool ModelAction::is_acquire() const
62 case std::memory_order_acquire:
63 case std::memory_order_acq_rel:
64 case std::memory_order_seq_cst:
71 bool ModelAction::is_release() const
74 case std::memory_order_release:
75 case std::memory_order_acq_rel:
76 case std::memory_order_seq_cst:
83 bool ModelAction::is_seqcst() const
85 return order==std::memory_order_seq_cst;
88 bool ModelAction::same_var(const ModelAction *act) const
90 return location == act->location;
93 bool ModelAction::same_thread(const ModelAction *act) const
95 return tid == act->tid;
98 void ModelAction::upgrade_rmw(ModelAction * act) {
100 ASSERT(act->is_rmw());
101 //Upgrade our type to the act's type
102 this->type=act->type;
103 this->order=act->order;
104 this->value=act->value;
107 /** The is_synchronizing method should only explore interleavings if:
108 * (1) the operations are seq_cst and don't commute or
109 * (2) the reordering may establish or break a synchronization relation.
110 * Other memory operations will be dealt with by using the reads_from
113 * @param act is the action to consider exploring a reordering.
114 * @return tells whether we have to explore a reordering.
117 bool ModelAction::is_synchronizing(const ModelAction *act) const
119 //Same thread can't be reordered
120 if (same_thread(act))
123 // Different locations commute
127 // Explore interleavings of seqcst writes to guarantee total order
128 // of seq_cst operations that don't commute
129 if (is_write() && is_seqcst() && act->is_write() && act->is_seqcst())
132 // Explore synchronizing read/write pairs
133 if (is_read() && is_acquire() && act->is_write() && act->is_release())
135 if (is_write() && is_release() && act->is_read() && act->is_acquire())
138 // Otherwise handle by reads_from relation
142 void ModelAction::create_cv(const ModelAction *parent)
147 cv = new ClockVector(parent->cv, this);
149 cv = new ClockVector(NULL, this);
152 void ModelAction::read_from(const ModelAction *act)
155 if (act->is_release() && this->is_acquire())
161 * Check whether 'this' happens before act, according to the memory-model's
162 * happens before relation. This is checked via the ClockVector constructs.
163 * @return true if this action's thread has synchronized with act's thread
164 * since the execution of act, false otherwise.
166 bool ModelAction::happens_before(const ModelAction *act) const
168 return act->cv->synchronized_since(this);
171 void ModelAction::print(void) const
173 const char *type_str;
174 switch (this->type) {
176 type_str = "thread create";
179 type_str = "thread start";
182 type_str = "thread yield";
185 type_str = "thread join";
188 type_str = "atomic read";
191 type_str = "atomic write";
194 type_str = "atomic rmw";
197 type_str = "atomic rmwr";
200 type_str = "atomic rmwc";
203 type_str = "init atomic";
206 type_str = "unknown type";
209 uint64_t valuetoprint=type==ATOMIC_READ?reads_from->value:value;
211 printf("(%3d) Thread: %-2d Action: %-13s MO: %d Loc: %14p Value: %-12" PRIu64,
212 seq_number, id_to_int(tid), type_str, order, location, valuetoprint);
214 printf(" Rf: %d", reads_from->get_seq_number());