void *locked; /* Thread holding the lock */
thread_id_t alloc_tid;
modelclock_t alloc_clock;
+ int init; // WL
};
class mutex {
bool try_lock();
void unlock();
struct mutex_state * get_state() {return &state;}
+ void initialize() { state.init = 1; } // WL
+ bool is_initialized() { return state.init == 1; }
private:
struct mutex_state state;
--- /dev/null
+/**
+ * @file pthread.h
+ * @brief C11 pthread.h interface header
+ */
+#ifndef PTHREAD_H
+#define PTHREAD_H 1
+
+#include <threads.h>
+
+typedef void *(*pthread_start_t)(void *);
+
+struct pthread_params {
+ pthread_start_t func;
+ void *arg;
+};
+
+int pthread_create(pthread_t *, const pthread_attr_t *,
+ void *(*start_routine) (void *), void * arg);
+void pthread_exit(void *);
+int pthread_join(pthread_t, void **);
+
+int pthread_mutex_init(pthread_mutex_t *, const pthread_mutexattr_t *);
+int pthread_mutex_lock(pthread_mutex_t *);
+int pthread_mutex_trylock(pthread_mutex_t *);
+int pthread_mutex_unlock(pthread_mutex_t *);
+
+int user_main(int, char**);
+
+#endif
#include "params.h"
#include <map>
+#include <mutex>
/* Forward declaration */
class Node;
void set_inspect_plugin(TraceAnalysis *a) { inspect_plugin=a; }
MEMALLOC
std::map<pthread_t, ModelAction*> pthread_map;
+ std::map<pthread_mutex_t *, std::mutex*> mutex_map;
private:
/** Flag indicates whether to restart the model checker. */
bool restart_flag;
--- /dev/null
+#include "common.h"
+#include "threads-model.h"
+#include "action.h"
+#include <pthread.h>
+#include <mutex>
+#include <vector>
+
+/* global "model" object */
+#include "model.h"
+
+int pthread_create(pthread_t *t, const pthread_attr_t * attr,
+ pthread_start_t start_routine, void * arg) {
+ struct pthread_params params = { start_routine, arg };
+
+ ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)¶ms);
+ model->pthread_map[*t] = act;
+
+ /* seq_cst is just a 'don't care' parameter */
+ model->switch_to_master(act);
+
+ return 0;
+}
+
+int pthread_join(pthread_t t, void **value_ptr) {
+ ModelAction *act = model->pthread_map[t];
+ Thread *th = act->get_thread_operand();
+ model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
+ return 0;
+}
+
+void pthread_exit(void *value_ptr) {
+ Thread * th = thread_current();
+ model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th));
+}
+
+int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
+ if (model->mutex_map.find(p_mutex) != model->mutex_map.end() /*&& table[p_mutex]->is_initialized()*/ ) {
+ model_print("Reinitialize a lock\n");
+ // return 1; // 0 means success; 1 means failure
+ }
+
+ std::mutex *m = new std::mutex();
+ m->initialize();
+ model->mutex_map[p_mutex] = m;
+ return 0;
+}
+
+int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
+ std::mutex *m = model->mutex_map[p_mutex];
+ m->lock();
+ /* error message? */
+ return 0;
+}
+int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
+ std::mutex *m = model->mutex_map[p_mutex];
+ return m->try_lock();
+ /* error message? */
+}
+int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
+ std::mutex *m = model->mutex_map[p_mutex];
+ m->unlock();
+ return 0;
+}