#include "action.h"
#include "tree.h"
#include "schedule.h"
+#include "snapshot-interface.h"
+#undef DEBUG
#include "common.h"
#define INITIAL_THREAD_ID 0
}
ModelChecker::ModelChecker()
-{
- /* First thread created will have id INITIAL_THREAD_ID */
- this->next_thread_id = INITIAL_THREAD_ID;
- used_sequence_numbers = 0;
+ :
/* Initialize default scheduler */
- this->scheduler = new Scheduler();
-
- num_executions = 0;
- this->current_action = NULL;
- this->exploring = NULL;
- this->nextThread = THREAD_ID_T_NONE;
-
- rootNode = new TreeNode();
- currentNode = rootNode;
- action_trace = new action_list_t();
+ scheduler(new Scheduler()),
+ /* First thread created will have id INITIAL_THREAD_ID */
+ next_thread_id(INITIAL_THREAD_ID),
+ used_sequence_numbers(0),
+
+ num_executions(0),
+ current_action(NULL),
+ exploring(NULL),
+ nextThread(THREAD_ID_T_NONE),
+ action_trace(new action_list_t()),
+ rootNode(new TreeNode()),
+ currentNode(rootNode)
+{
}
ModelChecker::~ModelChecker()
{
- std::map<int, class Thread *>::iterator it;
+ std::map<int, class Thread *, std::less< int >, MyAlloc< std::pair< int, class Thread * > > >::iterator it;
for (it = thread_map.begin(); it != thread_map.end(); it++)
delete (*it).second;
thread_map.clear();
free_action_list(action_trace);
- delete this->scheduler;
+ delete scheduler;
delete rootNode;
}
void ModelChecker::reset_to_initial_state()
{
DEBUG("+++ Resetting to initial state +++\n");
- std::map<int, class Thread *>::iterator it;
+ std::map<int, class Thread *, std::less< int >, MyAlloc< std::pair< int, class Thread * > > >::iterator it;
for (it = thread_map.begin(); it != thread_map.end(); it++)
delete (*it).second;
thread_map.clear();
current_action = NULL;
next_thread_id = INITIAL_THREAD_ID;
used_sequence_numbers = 0;
+ nextThread = 0;
/* scheduler reset ? */
}
ModelAction *next;
thread_id_t tid;
+ /* Have we completed exploring the preselected path? */
+ if (exploring == NULL)
+ return THREAD_ID_T_NONE;
+
+ /* Else, we are trying to replay an execution */
+ exploring->advance_state();
+
+ ASSERT(exploring->get_state() != NULL);
+
next = exploring->get_state();
if (next == exploring->get_diverge()) {
- TreeNode *node = next->get_node();
+ TreeNode *node = next->get_treenode();
/* Reached divergence point; discard our current 'exploring' */
DEBUG("*** Discard 'Backtrack' object ***\n");
return tid;
}
-thread_id_t ModelChecker::advance_backtracking_state()
-{
- /* Have we completed exploring the preselected path? */
- if (exploring == NULL)
- return THREAD_ID_T_NONE;
-
- /* Else, we are trying to replay an execution */
- exploring->advance_state();
-
- ASSERT(exploring->get_state() != NULL);
-
- return get_next_replay_thread();
-}
-
bool ModelChecker::next_execution()
{
DBG();
}
model->reset_to_initial_state();
- nextThread = get_next_replay_thread();
return true;
}
if (prev == NULL)
return;
- node = prev->get_node();
+ node = prev->get_treenode();
while (t && !node->is_enabled(t))
t = t->get_parent();
void ModelChecker::check_current_action(void)
{
- ModelAction *next = this->current_action;
-
- if (!next) {
+ ModelAction *curr = this->current_action;
+ current_action = NULL;
+ if (!curr) {
DEBUG("trying to push NULL action...\n");
return;
}
- current_action = NULL;
- nextThread = advance_backtracking_state();
- next->set_node(currentNode);
- set_backtracking(next);
- currentNode = currentNode->explore_child(next);
- this->action_trace->push_back(next);
+
+ nextThread = get_next_replay_thread();
+ curr->set_node(currentNode);
+ set_backtracking(curr);
+ currentNode = currentNode->explore_child(curr);
+ this->action_trace->push_back(curr);
}
void ModelChecker::print_summary(void)
old->set_state(THREAD_READY);
return Thread::swap(old, get_system_context());
}
-
-ModelAction::ModelAction(action_type_t type, memory_order order, void *loc, int value)
-{
- 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();
-}
-
-bool ModelAction::is_read()
-{
- return type == ATOMIC_READ;
-}
-
-bool ModelAction::is_write()
-{
- return type == ATOMIC_WRITE;
-}
-
-bool ModelAction::is_acquire()
-{
- switch (order) {
- case memory_order_acquire:
- case memory_order_acq_rel:
- case memory_order_seq_cst:
- return true;
- default:
- return false;
- }
-}
-
-bool ModelAction::is_release()
-{
- switch (order) {
- case memory_order_release:
- case memory_order_acq_rel:
- case memory_order_seq_cst:
- return true;
- default:
- return false;
- }
-}
-
-bool ModelAction::same_var(ModelAction *act)
-{
- return location == act->location;
-}
-
-bool ModelAction::same_thread(ModelAction *act)
-{
- return tid == act->tid;
-}
-
-bool ModelAction::is_dependent(ModelAction *act)
-{
- if (!is_read() && !is_write())
- return false;
- if (!act->is_read() && !act->is_write())
- return false;
- if (same_var(act) && !same_thread(act) &&
- (is_write() || act->is_write()))
- return true;
- return false;
-}
-
-void ModelAction::print(void)
-{
- const char *type_str;
- switch (this->type) {
- case THREAD_CREATE:
- type_str = "thread create";
- break;
- case THREAD_YIELD:
- type_str = "thread yield";
- break;
- case THREAD_JOIN:
- type_str = "thread join";
- break;
- case ATOMIC_READ:
- type_str = "atomic read";
- break;
- case ATOMIC_WRITE:
- type_str = "atomic write";
- 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);
-}