#include "concretepredicate.h"
#include "model.h"
+#include "execution.h"
+#include "newfuzzer.h"
+#include <cmath>
FuncNode::FuncNode(ModelHistory * history) :
+ func_id(0),
+ func_name(NULL),
history(history),
- exit_count(0),
+ inst_counter(1),
marker(1),
+ exit_count(0),
+ thrd_markers(),
+ thrd_recursion_depth(),
func_inst_map(),
inst_list(),
entry_insts(),
- predicate_tree_position(),
+ thrd_inst_pred_maps(),
+ thrd_inst_id_maps(),
+ thrd_loc_inst_maps(),
+ likely_null_set(),
+ thrd_predicate_tree_position(),
+ thrd_predicate_trace(),
edge_table(32),
out_edges()
{
predicate_tree_entry = new Predicate(NULL, true);
predicate_tree_entry->add_predicate_expr(NOPREDICATE, NULL, true);
+
predicate_tree_exit = new Predicate(NULL, false, true);
+ predicate_tree_exit->set_depth(MAX_DEPTH);
- // Memories that are reclaimed after each execution
- action_list_buffer = new SnapList<action_list_t *>();
+ /* Snapshot data structures below */
read_locations = new loc_set_t();
write_locations = new loc_set_t();
- val_loc_map = new HashTable<uint64_t, loc_set_t *, uint64_t, 0>();
+ val_loc_map = new HashTable<uint64_t, loc_set_t *, uint64_t, 0, snapshot_malloc, snapshot_calloc, snapshot_free, int64_hash>();
loc_may_equal_map = new HashTable<void *, loc_set_t *, uintptr_t, 0>();
//values_may_read_from = new value_set_t();
/* Reallocate snapshotted memories when new executions start */
void FuncNode::set_new_exec_flag()
{
- action_list_buffer = new SnapList<action_list_t *>();
read_locations = new loc_set_t();
write_locations = new loc_set_t();
- val_loc_map = new HashTable<uint64_t, loc_set_t *, uint64_t, 0>();
+ val_loc_map = new HashTable<uint64_t, loc_set_t *, uint64_t, 0, snapshot_malloc, snapshot_calloc, snapshot_free, int64_hash>();
loc_may_equal_map = new HashTable<void *, loc_set_t *, uintptr_t, 0>();
//values_may_read_from = new value_set_t();
/* Check whether FuncInst with the same type, position, and location
* as act has been added to func_inst_map or not. If not, add it.
- *
- * Note: currently, actions with the same position are filtered out by process_action,
- * so the collision list of FuncInst is not used. May remove it later.
*/
void FuncNode::add_inst(ModelAction *act)
{
if (position == NULL)
return;
- if ( func_inst_map.contains(position) ) {
- FuncInst * inst = func_inst_map.get(position);
+ FuncInst * func_inst = func_inst_map.get(position);
- ASSERT(inst->get_type() == act->get_type());
- int curr_execution_number = model->get_execution_number();
+ /* This position has not been inserted into hashtable before */
+ if (func_inst == NULL) {
+ func_inst = create_new_inst(act);
+ func_inst_map.put(position, func_inst);
+ return;
+ }
+
+ /* Volatile variables that use ++ or -- syntax may result in read and write actions with the same position */
+ if (func_inst->get_type() != act->get_type()) {
+ FuncInst * collision_inst = func_inst->search_in_collision(act);
- /* Reset locations when new executions start */
- if (inst->get_execution_number() != curr_execution_number) {
- inst->set_location(act->get_location());
- inst->set_execution_number(curr_execution_number);
+ if (collision_inst == NULL) {
+ collision_inst = create_new_inst(act);
+ func_inst->add_to_collision(collision_inst);
+ return;
+ } else {
+ func_inst = collision_inst;
}
+ }
- if (inst->get_location() != act->get_location())
- inst->not_single_location();
+ ASSERT(func_inst->get_type() == act->get_type());
+ int curr_execution_number = model->get_execution_number();
- return;
+ /* Reset locations when new executions start */
+ if (func_inst->get_execution_number() != curr_execution_number) {
+ func_inst->set_location(act->get_location());
+ func_inst->set_execution_number(curr_execution_number);
}
+ /* Mark the memory location of such inst as not unique */
+ if (func_inst->get_location() != act->get_location())
+ func_inst->not_single_location();
+}
+
+FuncInst * FuncNode::create_new_inst(ModelAction * act)
+{
FuncInst * func_inst = new FuncInst(act, this);
+ int exec_num = model->get_execution_number();
+ func_inst->set_execution_number(exec_num);
- func_inst_map.put(position, func_inst);
inst_list.push_back(func_inst);
+
+ return func_inst;
}
+
/* Get the FuncInst with the same type, position, and location
* as act
*
action_type inst_type = inst->get_type();
action_type act_type = act->get_type();
- // else if branch: an RMWRCAS action is converted to a RMW or READ action
- if (inst_type == act_type)
+ if (inst_type == act_type) {
return inst;
+ }
+ /* RMWRCAS actions are converted to RMW or READ actions */
else if (inst_type == ATOMIC_RMWRCAS &&
- (act_type == ATOMIC_RMW || act_type == ATOMIC_READ))
+ (act_type == ATOMIC_RMW || act_type == ATOMIC_READ)) {
return inst;
-
- return NULL;
+ }
+ /* Return the FuncInst in the collision list */
+ else {
+ return inst->search_in_collision(act);
+ }
}
-
void FuncNode::add_entry_inst(FuncInst * inst)
{
if (inst == NULL)
return;
mllnode<FuncInst *> * it;
- for (it = entry_insts.begin(); it != NULL; it = it->getNext()) {
+ for (it = entry_insts.begin();it != NULL;it = it->getNext()) {
if (inst == it->getVal())
return;
}
entry_insts.push_back(inst);
}
+void FuncNode::function_entry_handler(thread_id_t tid)
+{
+ init_marker(tid);
+ init_local_maps(tid);
+ init_predicate_tree_data_structure(tid);
+}
+
+void FuncNode::function_exit_handler(thread_id_t tid)
+{
+ int thread_id = id_to_int(tid);
+
+ reset_local_maps(tid);
+
+ thrd_recursion_depth[thread_id]--;
+ thrd_markers[thread_id]->pop_back();
+
+ Predicate * exit_pred = get_predicate_tree_position(tid);
+ if (exit_pred->get_exit() == NULL) {
+ // Exit predicate is unset yet
+ exit_pred->set_exit(predicate_tree_exit);
+ }
+
+ update_predicate_tree_weight(tid);
+ reset_predicate_tree_data_structure(tid);
+
+ exit_count++;
+ //model_print("exit count: %d\n", exit_count);
+
+// print_predicate_tree();
+}
+
/**
- * @brief Convert ModelAdtion list to FuncInst list
+ * @brief Convert ModelAdtion list to FuncInst list
* @param act_list A list of ModelActions
*/
-void FuncNode::update_tree(action_list_t * act_list)
+void FuncNode::update_tree(ModelAction * act)
{
- if (act_list == NULL || act_list->size() == 0)
+ bool should_process = act->is_read() || act->is_write();
+ if (!should_process)
return;
HashTable<void *, value_set_t *, uintptr_t, 0> * write_history = history->getWriteHistory();
/* build inst_list from act_list for later processing */
- func_inst_list_t inst_list;
- action_list_t rw_act_list;
+// func_inst_list_t inst_list;
- for (sllnode<ModelAction *> * it = act_list->begin(); it != NULL; it = it->getNext()) {
- ModelAction * act = it->getVal();
- FuncInst * func_inst = get_inst(act);
- void * loc = act->get_location();
+ FuncInst * func_inst = get_inst(act);
+ void * loc = act->get_location();
- if (func_inst == NULL)
- continue;
+ if (func_inst == NULL)
+ return;
- inst_list.push_back(func_inst);
- bool act_added = false;
+// inst_list.push_back(func_inst);
- if (act->is_write()) {
- rw_act_list.push_back(act);
- act_added = true;
- if (!write_locations->contains(loc)) {
- write_locations->add(loc);
- history->update_loc_wr_func_nodes_map(loc, this);
- }
+ if (act->is_write()) {
+ if (!write_locations->contains(loc)) {
+ write_locations->add(loc);
+ history->update_loc_wr_func_nodes_map(loc, this);
}
+ }
- if (act->is_read()) {
- if (!act_added)
- rw_act_list.push_back(act);
-
- /* If func_inst may only read_from a single location, then:
- *
- * The first time an action reads from some location,
- * import all the values that have been written to this
- * location from ModelHistory and notify ModelHistory
- * that this FuncNode may read from this location.
- */
- if (!read_locations->contains(loc) && func_inst->is_single_location()) {
- read_locations->add(loc);
- value_set_t * write_values = write_history->get(loc);
- add_to_val_loc_map(write_values, loc);
- history->update_loc_rd_func_nodes_map(loc, this);
- }
+ if (act->is_read()) {
+ /* If func_inst may only read_from a single location, then:
+ *
+ * The first time an action reads from some location,
+ * import all the values that have been written to this
+ * location from ModelHistory and notify ModelHistory
+ * that this FuncNode may read from this location.
+ */
+ if (!read_locations->contains(loc) && func_inst->is_single_location()) {
+ read_locations->add(loc);
+ value_set_t * write_values = write_history->get(loc);
+ add_to_val_loc_map(write_values, loc);
+ history->update_loc_rd_func_nodes_map(loc, this);
}
- }
-// model_print("function %s\n", func_name);
-// print_val_loc_map();
+ // Keep a has-been-zero-set record
+ if ( likely_reads_from_null(act) )
+ likely_null_set.put(func_inst, true);
+ }
- update_inst_tree(&inst_list);
- update_predicate_tree(&rw_act_list);
+// update_inst_tree(&inst_list); TODO
-// print_predicate_tree();
+ update_predicate_tree(act);
}
-/**
+/**
* @brief Link FuncInsts in inst_list - add one FuncInst to another's predecessors and successors
* @param inst_list A list of FuncInsts
*/
}
}
-void FuncNode::update_predicate_tree(action_list_t * act_list)
+void FuncNode::update_predicate_tree(ModelAction * next_act)
{
- if (act_list == NULL || act_list->size() == 0)
- return;
-
- incr_marker();
-
- /* Map a FuncInst to the its predicate */
- HashTable<FuncInst *, Predicate *, uintptr_t, 0> inst_pred_map(128);
+ thread_id_t tid = next_act->get_tid();
+ int thread_id = id_to_int(tid);
+ uint32_t this_marker = thrd_markers[thread_id]->back();
+ int recursion_depth = thrd_recursion_depth[thread_id];
- // Number FuncInsts to detect loops
- HashTable<FuncInst *, uint32_t, uintptr_t, 0> inst_id_map(128);
- uint32_t inst_counter = 0;
+ loc_inst_map_t * loc_inst_map = thrd_loc_inst_maps[thread_id]->back();
+ inst_pred_map_t * inst_pred_map = thrd_inst_pred_maps[thread_id]->back();
+ inst_id_map_t * inst_id_map = thrd_inst_id_maps[thread_id]->back();
- /* Only need to store the locations of read actions */
- HashTable<void *, ModelAction *, uintptr_t, 0> loc_act_map(128);
+ Predicate * curr_pred = get_predicate_tree_position(tid);
+ NewFuzzer * fuzzer = (NewFuzzer *)model->get_execution()->getFuzzer();
+ Predicate * selected_branch = fuzzer->get_selected_child_branch(tid);
- sllnode<ModelAction *> *it = act_list->begin();
- Predicate * curr_pred = predicate_tree_entry;
- while (it != NULL) {
- ModelAction * next_act = it->getVal();
+ bool amended;
+ while (true) {
FuncInst * next_inst = get_inst(next_act);
- next_inst->set_associated_act(next_act, marker);
- SnapVector<Predicate *> unset_predicates = SnapVector<Predicate *>();
- bool branch_found = follow_branch(&curr_pred, next_inst, next_act, &unset_predicates);
+ Predicate * unset_predicate = NULL;
+ bool branch_found = follow_branch(&curr_pred, next_inst, next_act, &unset_predicate);
// A branch with unset predicate expression is detected
- if (!branch_found && unset_predicates.size() != 0) {
- ASSERT(unset_predicates.size() == 1);
- Predicate * one_branch = unset_predicates[0];
-
- bool amended = amend_predicate_expr(&curr_pred, next_inst, next_act);
+ if (!branch_found && unset_predicate != NULL) {
+ amended = amend_predicate_expr(curr_pred, next_inst, next_act);
if (amended)
continue;
else {
- curr_pred = one_branch;
+ curr_pred = unset_predicate;
branch_found = true;
}
}
// Detect loops
- if (!branch_found && inst_id_map.contains(next_inst)) {
+ if (!branch_found && inst_id_map->contains(next_inst)) {
FuncInst * curr_inst = curr_pred->get_func_inst();
- uint32_t curr_id = inst_id_map.get(curr_inst);
- uint32_t next_id = inst_id_map.get(next_inst);
+ uint32_t curr_id = inst_id_map->get(curr_inst);
+ uint32_t next_id = inst_id_map->get(next_inst);
if (curr_id >= next_id) {
- Predicate * old_pred = inst_pred_map.get(next_inst);
+ Predicate * old_pred = inst_pred_map->get(next_inst);
Predicate * back_pred = old_pred->get_parent();
+ // Add to the set of backedges
curr_pred->add_backedge(back_pred);
curr_pred = back_pred;
+
continue;
}
}
// Generate new branches
if (!branch_found) {
SnapVector<struct half_pred_expr *> half_pred_expressions;
- infer_predicates(next_inst, next_act, &loc_act_map, &half_pred_expressions);
- generate_predicates(&curr_pred, next_inst, &half_pred_expressions);
+ infer_predicates(next_inst, next_act, &half_pred_expressions);
+ generate_predicates(curr_pred, next_inst, &half_pred_expressions);
continue;
}
- if (next_act->is_write())
+ if (next_act->is_write()) {
curr_pred->set_write(true);
+ }
if (next_act->is_read()) {
- loc_act_map.put(next_act->get_location(), next_act);
+ /* Only need to store the locations of read actions */
+ loc_inst_map->put(next_act->get_location(), next_inst);
}
- inst_pred_map.put(next_inst, curr_pred);
- if (!inst_id_map.contains(next_inst))
- inst_id_map.put(next_inst, inst_counter++);
+ inst_pred_map->put(next_inst, curr_pred);
+ set_predicate_tree_position(tid, curr_pred);
- it = it->getNext();
- curr_pred->incr_count();
+ if (!inst_id_map->contains(next_inst))
+ inst_id_map->put(next_inst, inst_counter++);
+
+ curr_pred->incr_expl_count();
+ add_predicate_to_trace(tid, curr_pred);
+ if (next_act->is_read())
+ next_inst->set_associated_read(tid, recursion_depth, this_marker, next_act->get_reads_from_value());
+
+ break;
}
- curr_pred->set_exit(predicate_tree_exit);
+ // A check
+ if (next_act->is_read()) {
+// if (selected_branch != NULL && !amended)
+// ASSERT(selected_branch == curr_pred);
+ }
}
/* Given curr_pred and next_inst, find the branch following curr_pred that
- * contains next_inst and the correct predicate.
+ * contains next_inst and the correct predicate.
* @return true if branch found, false otherwise.
*/
bool FuncNode::follow_branch(Predicate ** curr_pred, FuncInst * next_inst,
- ModelAction * next_act, SnapVector<Predicate *> * unset_predicates)
+ ModelAction * next_act, Predicate ** unset_predicate)
{
/* Check if a branch with func_inst and corresponding predicate exists */
bool branch_found = false;
+ thread_id_t tid = next_act->get_tid();
+
ModelVector<Predicate *> * branches = (*curr_pred)->get_children();
- for (uint i = 0; i < branches->size(); i++) {
+ for (uint i = 0;i < branches->size();i++) {
Predicate * branch = (*branches)[i];
if (branch->get_func_inst() != next_inst)
continue;
/* Check against predicate expressions */
bool predicate_correct = true;
PredExprSet * pred_expressions = branch->get_pred_expressions();
- PredExprSetIter * pred_expr_it = pred_expressions->iterator();
/* Only read and rmw actions my have unset predicate expressions */
if (pred_expressions->getSize() == 0) {
predicate_correct = false;
- unset_predicates->push_back(branch);
+
+ if (*unset_predicate == NULL)
+ *unset_predicate = branch;
+ else
+ ASSERT(false);
+
+ continue;
}
+ PredExprSetIter * pred_expr_it = pred_expressions->iterator();
while (pred_expr_it->hasNext()) {
pred_expr * pred_expression = pred_expr_it->next();
uint64_t last_read, next_read;
bool equality;
switch(pred_expression->token) {
- case NOPREDICATE:
- predicate_correct = true;
- break;
- case EQUALITY:
- FuncInst * to_be_compared;
- ModelAction * last_act;
-
- to_be_compared = pred_expression->func_inst;
- last_act = to_be_compared->get_associated_act(marker);
-
- last_read = last_act->get_reads_from_value();
- next_read = next_act->get_reads_from_value();
- equality = (last_read == next_read);
- if (equality != pred_expression->value)
- predicate_correct = false;
-
- break;
- case NULLITY:
- next_read = next_act->get_reads_from_value();
- equality = ((void*)next_read == NULL);
- if (equality != pred_expression->value)
- predicate_correct = false;
- break;
- default:
+ case NOPREDICATE:
+ predicate_correct = true;
+ break;
+ case EQUALITY:
+ FuncInst * to_be_compared;
+ to_be_compared = pred_expression->func_inst;
+
+ last_read = get_associated_read(tid, to_be_compared);
+ if (last_read == VALUE_NONE)
+ predicate_correct = false;
+ // ASSERT(last_read != VALUE_NONE);
+
+ next_read = next_act->get_reads_from_value();
+ equality = (last_read == next_read);
+ if (equality != pred_expression->value)
predicate_correct = false;
- model_print("unkown predicate token\n");
- break;
+
+ break;
+ case NULLITY:
+ // TODO: implement likely to be null
+ equality = likely_reads_from_null(next_act);
+ if (equality != pred_expression->value)
+ predicate_correct = false;
+ break;
+ default:
+ predicate_correct = false;
+ model_print("unkown predicate token\n");
+ break;
}
}
+ delete pred_expr_it;
+
if (predicate_correct) {
*curr_pred = branch;
branch_found = true;
/* Infer predicate expressions, which are generated in FuncNode::generate_predicates */
void FuncNode::infer_predicates(FuncInst * next_inst, ModelAction * next_act,
- HashTable<void *, ModelAction *, uintptr_t, 0> * loc_act_map,
- SnapVector<struct half_pred_expr *> * half_pred_expressions)
+ SnapVector<struct half_pred_expr *> * half_pred_expressions)
{
void * loc = next_act->get_location();
+ int thread_id = id_to_int(next_act->get_tid());
+ loc_inst_map_t * loc_inst_map = thrd_loc_inst_maps[thread_id]->back();
if (next_inst->is_read()) {
/* read + rmw */
- if ( loc_act_map->contains(loc) ) {
- ModelAction * last_act = loc_act_map->get(loc);
- FuncInst * last_inst = get_inst(last_act);
+ if ( loc_inst_map->contains(loc) ) {
+ FuncInst * last_inst = loc_inst_map->get(loc);
struct half_pred_expr * expression = new half_pred_expr(EQUALITY, last_inst);
half_pred_expressions->push_back(expression);
- } else if ( next_inst->is_single_location() ){
+ } else if ( next_inst->is_single_location() ) {
loc_set_t * loc_may_equal = loc_may_equal_map->get(loc);
if (loc_may_equal != NULL) {
loc_set_iter * loc_it = loc_may_equal->iterator();
while (loc_it->hasNext()) {
void * neighbor = loc_it->next();
- if (loc_act_map->contains(neighbor)) {
- ModelAction * last_act = loc_act_map->get(neighbor);
- FuncInst * last_inst = get_inst(last_act);
+ if (loc_inst_map->contains(neighbor)) {
+ FuncInst * last_inst = loc_inst_map->get(neighbor);
struct half_pred_expr * expression = new half_pred_expr(EQUALITY, last_inst);
half_pred_expressions->push_back(expression);
}
}
- }
- } else {
- // next_inst is not single location
- uint64_t read_val = next_act->get_reads_from_value();
- // only infer NULLITY predicate when it is actually NULL.
- if ( (void*)read_val == NULL) {
- struct half_pred_expr * expression = new half_pred_expr(NULLITY, NULL);
- half_pred_expressions->push_back(expression);
+ delete loc_it;
}
}
+
+ // next_inst is not single location and has been null
+ bool likely_null = likely_null_set.contains(next_inst);
+ if ( !next_inst->is_single_location() && likely_null ) {
+ struct half_pred_expr * expression = new half_pred_expr(NULLITY, NULL);
+ half_pred_expressions->push_back(expression);
+ }
} else {
/* Pure writes */
// TODO: do anything here?
}
/* Able to generate complex predicates when there are multiple predciate expressions */
-void FuncNode::generate_predicates(Predicate ** curr_pred, FuncInst * next_inst,
- SnapVector<struct half_pred_expr *> * half_pred_expressions)
+void FuncNode::generate_predicates(Predicate * curr_pred, FuncInst * next_inst,
+ SnapVector<struct half_pred_expr *> * half_pred_expressions)
{
if (half_pred_expressions->size() == 0) {
Predicate * new_pred = new Predicate(next_inst);
- (*curr_pred)->add_child(new_pred);
- new_pred->set_parent(*curr_pred);
+ curr_pred->add_child(new_pred);
+ new_pred->set_parent(curr_pred);
/* entry predicates and predicates containing pure write actions
* have no predicate expressions */
- if ( (*curr_pred)->is_entry_predicate() )
+ if ( curr_pred->is_entry_predicate() )
new_pred->add_predicate_expr(NOPREDICATE, NULL, true);
else if (next_inst->is_write()) {
/* next_inst->is_write() <==> pure writes */
predicates[0]->add_predicate_expr(half_expr->token, half_expr->func_inst, true);
predicates[1]->add_predicate_expr(half_expr->token, half_expr->func_inst, false);
- for (uint i = 1; i < half_pred_expressions->size(); i++) {
+ for (uint i = 1;i < half_pred_expressions->size();i++) {
half_expr = (*half_pred_expressions)[i];
uint old_size = predicates.size();
- for (uint j = 0; j < old_size; j++) {
+ for (uint j = 0;j < old_size;j++) {
Predicate * pred = predicates[j];
Predicate * new_pred = new Predicate(next_inst);
new_pred->copy_predicate_expr(pred);
}
}
- for (uint i = 0; i < predicates.size(); i++) {
+ for (uint i = 0;i < predicates.size();i++) {
Predicate * pred= predicates[i];
- (*curr_pred)->add_child(pred);
- pred->set_parent(*curr_pred);
+ curr_pred->add_child(pred);
+ pred->set_parent(curr_pred);
}
/* Free memories allocated by infer_predicate */
- for (uint i = 0; i < half_pred_expressions->size(); i++) {
+ for (uint i = 0;i < half_pred_expressions->size();i++) {
struct half_pred_expr * tmp = (*half_pred_expressions)[i];
snapshot_free(tmp);
}
}
/* Amend predicates that contain no predicate expressions. Currenlty only amend with NULLITY predicates */
-bool FuncNode::amend_predicate_expr(Predicate ** curr_pred, FuncInst * next_inst, ModelAction * next_act)
+bool FuncNode::amend_predicate_expr(Predicate * curr_pred, FuncInst * next_inst, ModelAction * next_act)
{
- // there should only be only child
- Predicate * unset_pred = (*curr_pred)->get_children()->back();
- uint64_t read_val = next_act->get_reads_from_value();
+ ModelVector<Predicate *> * children = curr_pred->get_children();
+
+ Predicate * unset_pred = NULL;
+ for (uint i = 0;i < children->size();i++) {
+ Predicate * child = (*children)[i];
+ if (child->get_func_inst() == next_inst) {
+ unset_pred = child;
+ break;
+ }
+ }
+
+ bool likely_null = likely_null_set.contains(next_inst);
// only generate NULLITY predicate when it is actually NULL.
- if ( !next_inst->is_single_location() && (void*)read_val == NULL ) {
+ if ( !next_inst->is_single_location() && likely_null ) {
Predicate * new_pred = new Predicate(next_inst);
- (*curr_pred)->add_child(new_pred);
- new_pred->set_parent(*curr_pred);
+ curr_pred->add_child(new_pred);
+ new_pred->set_parent(curr_pred);
unset_pred->add_predicate_expr(NULLITY, NULL, false);
new_pred->add_predicate_expr(NULLITY, NULL, true);
uint64_t val = it->next();
add_to_val_loc_map(val, loc);
}
+
+ delete it;
}
void FuncNode::update_loc_may_equal_map(void * new_loc, loc_set_t * old_locations)
}
_neighbors->add(new_loc);
}
+
+ delete loc_it;
}
-/* Every time a thread enters a function, set its position to the predicate tree entry */
-void FuncNode::init_predicate_tree_position(thread_id_t tid)
+bool FuncNode::likely_reads_from_null(ModelAction * read)
{
- int thread_id = id_to_int(tid);
- if (predicate_tree_position.size() <= (uint) thread_id)
- predicate_tree_position.resize(thread_id + 1);
+ uint64_t read_val = read->get_reads_from_value();
+ if ( (void *)(read_val && 0xffffffff) == NULL )
+ return true;
- predicate_tree_position[thread_id] = predicate_tree_entry;
+ return false;
}
void FuncNode::set_predicate_tree_position(thread_id_t tid, Predicate * pred)
{
int thread_id = id_to_int(tid);
- predicate_tree_position[thread_id] = pred;
+ ModelVector<Predicate *> * stack = thrd_predicate_tree_position[thread_id];
+ (*stack)[stack->size() - 1] = pred;
}
/* @return The position of a thread in a predicate tree */
Predicate * FuncNode::get_predicate_tree_position(thread_id_t tid)
{
int thread_id = id_to_int(tid);
- return predicate_tree_position[thread_id];
+ return thrd_predicate_tree_position[thread_id]->back();
}
-/* Make sure elements of thrd_inst_act_map are initialized properly when threads enter functions */
-void FuncNode::init_inst_act_map(thread_id_t tid)
+void FuncNode::add_predicate_to_trace(thread_id_t tid, Predicate * pred)
{
int thread_id = id_to_int(tid);
- SnapVector<inst_act_map_t *> * thrd_inst_act_map = history->getThrdInstActMap(func_id);
- uint old_size = thrd_inst_act_map->size();
+ thrd_predicate_trace[thread_id]->back()->push_back(pred);
+}
+
+void FuncNode::init_marker(thread_id_t tid)
+{
+ marker++;
+
+ int thread_id = id_to_int(tid);
+ int old_size = thrd_markers.size();
- if (thrd_inst_act_map->size() <= (uint) thread_id) {
- uint new_size = thread_id + 1;
- thrd_inst_act_map->resize(new_size);
+ if (old_size < thread_id + 1) {
+ thrd_markers.resize(thread_id + 1);
- for (uint i = old_size; i < new_size; i++)
- (*thrd_inst_act_map)[i] = new inst_act_map_t(128);
+ for (int i = old_size; i < thread_id + 1; i++) {
+ thrd_markers[i] = new ModelVector<uint32_t>();
+ thrd_recursion_depth.push_back(-1);
+ }
}
+
+ thrd_markers[thread_id]->push_back(marker);
+ thrd_recursion_depth[thread_id]++;
}
-/* Reset elements of thrd_inst_act_map when threads exit functions */
-void FuncNode::reset_inst_act_map(thread_id_t tid)
+uint64_t FuncNode::get_associated_read(thread_id_t tid, FuncInst * inst)
{
int thread_id = id_to_int(tid);
- SnapVector<inst_act_map_t *> * thrd_inst_act_map = history->getThrdInstActMap(func_id);
+ int recursion_depth = thrd_recursion_depth[thread_id];
+ uint marker = thrd_markers[thread_id]->back();
- inst_act_map_t * map = (*thrd_inst_act_map)[thread_id];
- map->reset();
+ return inst->get_associated_read(tid, recursion_depth, marker);
}
-void FuncNode::update_inst_act_map(thread_id_t tid, ModelAction * read_act)
+/* Make sure elements of maps are initialized properly when threads enter functions */
+void FuncNode::init_local_maps(thread_id_t tid)
{
int thread_id = id_to_int(tid);
- SnapVector<inst_act_map_t *> * thrd_inst_act_map = history->getThrdInstActMap(func_id);
+ int old_size = thrd_loc_inst_maps.size();
+
+ if (old_size < thread_id + 1) {
+ int new_size = thread_id + 1;
- inst_act_map_t * map = (*thrd_inst_act_map)[thread_id];
- FuncInst * read_inst = get_inst(read_act);
- map->put(read_inst, read_act);
+ thrd_loc_inst_maps.resize(new_size);
+ thrd_inst_id_maps.resize(new_size);
+ thrd_inst_pred_maps.resize(new_size);
+
+ for (int i = old_size; i < new_size; i++) {
+ thrd_loc_inst_maps[i] = new ModelVector<loc_inst_map_t *>;
+ thrd_inst_id_maps[i] = new ModelVector<inst_id_map_t *>;
+ thrd_inst_pred_maps[i] = new ModelVector<inst_pred_map_t *>;
+ }
+ }
+
+ ModelVector<loc_inst_map_t *> * map = thrd_loc_inst_maps[thread_id];
+ int index = thrd_recursion_depth[thread_id];
+
+ // If there are recursive calls, push more hashtables into the vector.
+ if (map->size() < (uint) index + 1) {
+ thrd_loc_inst_maps[thread_id]->push_back(new loc_inst_map_t(64));
+ thrd_inst_id_maps[thread_id]->push_back(new inst_id_map_t(64));
+ thrd_inst_pred_maps[thread_id]->push_back(new inst_pred_map_t(64));
+ }
+
+ ASSERT(map->size() == (uint) index + 1);
}
-inst_act_map_t * FuncNode::get_inst_act_map(thread_id_t tid)
+/* Reset elements of maps when threads exit functions */
+void FuncNode::reset_local_maps(thread_id_t tid)
{
int thread_id = id_to_int(tid);
- SnapVector<inst_act_map_t *> * thrd_inst_act_map = history->getThrdInstActMap(func_id);
+ int index = thrd_recursion_depth[thread_id];
+
+ // When recursive call ends, keep only one hashtable in the vector
+ if (index > 0) {
+ delete thrd_loc_inst_maps[thread_id]->back();
+ delete thrd_inst_id_maps[thread_id]->back();
+ delete thrd_inst_pred_maps[thread_id]->back();
- return (*thrd_inst_act_map)[thread_id];
+ thrd_loc_inst_maps[thread_id]->pop_back();
+ thrd_inst_id_maps[thread_id]->pop_back();
+ thrd_inst_pred_maps[thread_id]->pop_back();
+ } else {
+ thrd_loc_inst_maps[thread_id]->back()->reset();
+ thrd_inst_id_maps[thread_id]->back()->reset();
+ thrd_inst_pred_maps[thread_id]->back()->reset();
+ }
+}
+
+void FuncNode::init_predicate_tree_data_structure(thread_id_t tid)
+{
+ int thread_id = id_to_int(tid);
+ int old_size = thrd_predicate_tree_position.size();
+
+ if (old_size < thread_id + 1) {
+ thrd_predicate_tree_position.resize(thread_id + 1);
+ thrd_predicate_trace.resize(thread_id + 1);
+
+ for (int i = old_size; i < thread_id + 1; i++) {
+ thrd_predicate_tree_position[i] = new ModelVector<Predicate *>();
+ thrd_predicate_trace[i] = new ModelVector<predicate_trace_t *>();
+ }
+ }
+
+ thrd_predicate_tree_position[thread_id]->push_back(predicate_tree_entry);
+ thrd_predicate_trace[thread_id]->push_back(new predicate_trace_t());
+}
+
+void FuncNode::reset_predicate_tree_data_structure(thread_id_t tid)
+{
+ int thread_id = id_to_int(tid);
+ thrd_predicate_tree_position[thread_id]->pop_back();
+
+ // Free memories allocated in init_predicate_tree_data_structure
+ delete thrd_predicate_trace[thread_id]->back();
+ thrd_predicate_trace[thread_id]->pop_back();
}
/* Add FuncNodes that this node may follow */
else if (target == this)
return 0;
+ // Be careful with memory
SnapList<FuncNode *> queue;
HashTable<FuncNode *, int, uintptr_t, 0> distances(128);
ModelList<FuncNode *> * outEdges = curr->get_out_edges();
mllnode<FuncNode *> * it;
- for (it = outEdges->begin(); it != NULL; it = it->getNext()) {
+ for (it = outEdges->begin();it != NULL;it = it->getNext()) {
FuncNode * out_node = it->getVal();
/* This node has not been visited before */
return -1;
}
+void FuncNode::update_predicate_tree_weight(thread_id_t tid)
+{
+ predicate_trace_t * trace = thrd_predicate_trace[id_to_int(tid)]->back();
+
+ // Update predicate weights based on prediate trace
+ for (int i = trace->size() - 1; i >= 0; i--) {
+ Predicate * node = (*trace)[i];
+ ModelVector<Predicate *> * children = node->get_children();
+
+ if (children->size() == 0) {
+ double weight = 100.0 / sqrt(node->get_expl_count() + node->get_fail_count() + 1);
+ node->set_weight(weight);
+ } else {
+ double weight_sum = 0.0;
+ for (uint i = 0;i < children->size();i++) {
+ Predicate * child = (*children)[i];
+ double weight = child->get_weight();
+ weight_sum += weight;
+ }
+
+ double average_weight = (double) weight_sum / (double) children->size();
+ double weight = average_weight * pow(0.9, node->get_depth());
+ node->set_weight(weight);
+ }
+ }
+}
+
void FuncNode::print_predicate_tree()
{
model_print("digraph function_%s {\n", func_name);
predicate_tree_exit->print_predicate();
model_print("}\n"); // end of graph
}
-
-void FuncNode::print_val_loc_map()
-{
-/*
- value_set_iter * val_it = values_may_read_from->iterator();
- while (val_it->hasNext()) {
- uint64_t value = val_it->next();
- model_print("val %llx: ", value);
-
- loc_set_t * locations = val_loc_map->get(value);
- loc_set_iter * loc_it = locations->iterator();
- while (loc_it->hasNext()) {
- void * location = loc_it->next();
- model_print("%p ", location);
- }
- model_print("\n");
- }
-*/
-}