predicate.cc

   1 #include "funcinst.h"
   2 #include "predicate.h"
   3 #include "concretepredicate.h"
   4
   5 Predicate::Predicate(FuncInst * func_inst, bool is_entry, bool is_exit) :
   6         func_inst(func_inst),
   7         entry_predicate(is_entry),
   8         exit_predicate(is_exit),
   9         does_write(false),
  10         depth(0),
  11         weight(0),
  12         exploration_count(0),
  13         store_visible_count(0),
  14         total_checking_count(0),
  15         pred_expressions(16),
  16         children(),
  17         parent(NULL),
  18         exit(NULL),
  19         backedges(16)
  20 {}
  21
  22 Predicate::~Predicate()
  23 {
  24         // parent and func_inst should not be deleted
  25         pred_expressions.reset();
  26         backedges.reset();
  27         children.clear();
  28 }
  29
  30 unsigned int pred_expr_hash(struct pred_expr * expr)
  31 {
  32         return (unsigned int)((uintptr_t)expr);
  33 }
  34
  35 bool pred_expr_equal(struct pred_expr * p1, struct pred_expr * p2)
  36 {
  37         if (p1->token != p2->token)
  38                 return false;
  39         if (p1->token == EQUALITY && p1->func_inst != p2->func_inst)
  40                 return false;
  41         if (p1->value != p2->value)
  42                 return false;
  43         return true;
  44 }
  45
  46 void Predicate::add_predicate_expr(token_t token, FuncInst * func_inst, bool value)
  47 {
  48         struct pred_expr *ptr = new pred_expr(token, func_inst, value);
  49         pred_expressions.add(ptr);
  50 }
  51
  52 void Predicate::add_child(Predicate * child)
  53 {
  54         /* check duplication? */
  55         children.push_back(child);
  56 }
  57
  58 void Predicate::set_parent(Predicate * parent_pred)
  59 {
  60         parent = parent_pred;
  61         depth = parent_pred->get_depth() + 1;
  62 }
  63
  64 void Predicate::set_exit(Predicate * exit_pred)
  65 {
  66         exit = exit_pred;
  67 }
  68
  69 void Predicate::copy_predicate_expr(Predicate * other)
  70 {
  71         PredExprSet * other_pred_expressions = other->get_pred_expressions();
  72         PredExprSetIter * it = other_pred_expressions->iterator();
  73
  74         while (it->hasNext()) {
  75                 struct pred_expr * ptr = it->next();
  76                 struct pred_expr * copy = new pred_expr(ptr->token, ptr->func_inst, ptr->value);
  77                 pred_expressions.add(copy);
  78         }
  79
  80         delete it;
  81 }
  82
  83 /* Follow the child if any child whose FuncInst matches with inst
  84  *
  85  * @param inst must be an ATOMIC_WRITE FuncInst
  86  * @return NULL if no such child is found.
  87  */
  88 Predicate * Predicate::follow_write_child(FuncInst * inst)
  89 {
  90         action_type type = inst->get_type();
  91         ASSERT(type == ATOMIC_WRITE || type == ATOMIC_INIT);
  92
  93         for (uint i = 0;i < children.size();i++) {
  94                 Predicate * child = children[i];
  95                 if (child->get_func_inst() == inst)
  96                         return child;
  97         }
  98
  99         return NULL;
 100 }
 101
 102 /* Evaluate predicate expressions against the given inst_act_map */
 103 ConcretePredicate * Predicate::evaluate(inst_act_map_t * inst_act_map, thread_id_t tid)
 104 {
 105         ConcretePredicate * concrete = new ConcretePredicate(tid);
 106         PredExprSetIter * it = pred_expressions.iterator();
 107
 108         while (it->hasNext()) {
 109                 struct pred_expr * ptr = it->next();
 110                 uint64_t value = 0;
 111
 112                 switch(ptr->token) {
 113                 case NOPREDICATE:
 114                         break;
 115                 case EQUALITY:
 116                         FuncInst * to_be_compared;
 117                         ModelAction * last_act;
 118
 119                         to_be_compared = ptr->func_inst;
 120                         last_act = inst_act_map->get(to_be_compared);
 121                         value = last_act->get_reads_from_value();
 122                         break;
 123                 case NULLITY:
 124                         break;
 125                 default:
 126                         break;
 127                 }
 128
 129                 concrete->add_expression(ptr->token, value, ptr->value);
 130         }
 131
 132         delete it;
 133         return concrete;
 134 }
 135
 136 void Predicate::print_predicate()
 137 {
 138         model_print("\"%p\" [shape=box, label=\"", this);
 139         if (entry_predicate) {
 140                 model_print("entry node\"];\n");
 141                 return;
 142         }
 143
 144         if (exit_predicate) {
 145                 model_print("exit node\"];\n");
 146                 return;
 147         }
 148
 149         model_print("depth: %u; weight: %g\n", depth, weight);
 150
 151         func_inst->print();
 152
 153         if (pred_expressions.getSize() == 0)
 154                 model_print("predicate unset\n");
 155
 156         PredExprSetIter * it = pred_expressions.iterator();
 157         while (it->hasNext()) {
 158                 struct pred_expr * expr = it->next();
 159                 FuncInst * inst = expr->func_inst;
 160                 switch (expr->token) {
 161                 case NOPREDICATE:
 162                         break;
 163                 case EQUALITY:
 164                         model_print("predicate token: equality, position: %s, value: %d\n", inst->get_position(), expr->value);
 165                         break;
 166                 case NULLITY:
 167                         model_print("predicate token: nullity, value: %d\n", expr->value);
 168                         break;
 169                 default:
 170                         model_print("unknown predicate token\n");
 171                         break;
 172                 }
 173         }
 174
 175         if (does_write) {
 176                 model_print("Does write\n");
 177         }
 178
 179         double prob = (double) store_visible_count / total_checking_count;
 180         model_print("Total checks: %d, visible count: %d; prob: %f\n", total_checking_count, store_visible_count, prob);
 181         model_print("Exploration count: %d, failure count: %d", exploration_count, failure_count);
 182         model_print("\"];\n");
 183
 184         delete it;
 185 }
 186
 187 void Predicate::print_pred_subtree()
 188 {
 189         print_predicate();
 190         for (uint i = 0;i < children.size();i++) {
 191                 Predicate * child = children[i];
 192                 child->print_pred_subtree();
 193                 model_print("\"%p\" -> \"%p\"\n", this, child);
 194         }
 195
 196         PredSetIter * it = backedges.iterator();
 197         while (it->hasNext()) {
 198                 Predicate * backedge = it->next();
 199                 model_print("\"%p\" -> \"%p\"[style=dashed, color=grey]\n", this, backedge);
 200         }
 201
 202         if (exit) {
 203                 model_print("\"%p\" -> \"%p\"[style=dashed, color=red]\n", this, exit);
 204         }
 205
 206         delete it;
 207 }