#include <list>
#include <map>
+#include <cstddef>
+#include <ucontext.h>
#include "schedule.h"
#include "libthreads.h"
#include "libatomic.h"
-#include "threads_internal.h"
+#include "threads.h"
+#include "action.h"
-#define VALUE_NONE -1
+/* Forward declaration */
+class TreeNode;
-typedef enum action_type {
- THREAD_CREATE,
- THREAD_YIELD,
- THREAD_JOIN,
- ATOMIC_READ,
- ATOMIC_WRITE
-} action_type_t;
-
-class ModelAction {
+class Backtrack {
public:
- ModelAction(action_type_t type, memory_order order, void *loc, int value);
- void print(void);
+ Backtrack(ModelAction *d, action_list_t *t) {
+ diverge = d;
+ actionTrace = t;
+ iter = actionTrace->begin();
+ }
+ ModelAction * get_diverge() { return diverge; }
+ action_list_t * get_trace() { return actionTrace; }
+ void advance_state() { iter++; }
+ ModelAction * get_state() {
+ return iter == actionTrace->end() ? NULL : *iter;
+ }
private:
- action_type type;
- memory_order order;
- void *location;
- thread_id_t tid;
- int value;
+ ModelAction *diverge;
+ action_list_t *actionTrace;
+ /* points to position in actionTrace as we replay */
+ action_list_t::iterator iter;
};
class ModelChecker {
ModelChecker();
~ModelChecker();
class Scheduler *scheduler;
- Thread *system_thread;
- void add_system_thread(Thread *t);
+ void set_system_context(ucontext_t *ctxt) { system_context = ctxt; }
+ ucontext_t * get_system_context(void) { return system_context; }
void set_current_action(ModelAction *act) { current_action = act; }
void check_current_action(void);
- void print_trace(void);
+ void print_summary(void);
+ Thread * schedule_next_thread();
int add_thread(Thread *t);
- Thread *get_thread(thread_id_t tid) { return thread_map[tid]; }
+ void remove_thread(Thread *t);
+ Thread * get_thread(thread_id_t tid) { return thread_map[tid]; }
- void assign_id(Thread *t);
+ int get_next_id();
int switch_to_master(ModelAction *act);
+
+ bool next_execution();
private:
int used_thread_id;
+ int num_executions;
+
+ ModelAction * get_last_conflict(ModelAction *act);
+ void set_backtracking(ModelAction *act);
+ thread_id_t advance_backtracking_state();
+ thread_id_t get_next_replay_thread();
+ Backtrack * get_next_backtrack();
+ void reset_to_initial_state();
+
class ModelAction *current_action;
- std::list<class ModelAction *> action_trace;
+ Backtrack *exploring;
+ thread_id_t nextThread;
+
+ ucontext_t *system_context;
+ action_list_t *action_trace;
std::map<thread_id_t, class Thread *> thread_map;
+ class TreeNode *rootNode, *currentNode;
+ std::list<class Backtrack *> backtrack_list;
};
extern ModelChecker *model;
-int thread_switch_to_master(ModelAction *act);
-
#endif /* __MODEL_H__ */