2 #include "threads-model.h"
6 #include "snapshot-interface.h"
10 #include <condition_variable>
13 /* global "model" object */
15 #include "execution.h"
17 int pthread_create(pthread_t *t, const pthread_attr_t * attr,
18 pthread_start_t start_routine, void * arg) {
20 snapshot_system_init(10000, 1024, 1024, 40000);
21 model = new ModelChecker();
22 model->startChecker();
25 struct pthread_params params = { start_routine, arg };
27 ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)¶ms);
29 /* seq_cst is just a 'don't care' parameter */
30 model->switch_to_master(act);
35 int pthread_join(pthread_t t, void **value_ptr) {
36 // Thread *th = model->get_pthread(t);
37 ModelExecution *execution = model->get_execution();
38 Thread *th = execution->get_pthread(t);
40 model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
44 void *rtval = th->get_pthread_return();
50 void pthread_exit(void *value_ptr) {
51 Thread * th = thread_current();
52 model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th));
53 while(1) ;//make warning goaway
56 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
57 cdsc::mutex *m = new cdsc::mutex();
60 snapshot_system_init(10000, 1024, 1024, 40000);
61 model = new ModelChecker();
62 model->startChecker();
65 ModelExecution *execution = model->get_execution();
66 execution->getMutexMap()->put(p_mutex, m);
71 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
73 snapshot_system_init(10000, 1024, 1024, 40000);
74 model = new ModelChecker();
75 model->startChecker();
79 ModelExecution *execution = model->get_execution();
81 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
82 instead of pthread_mutex_init, or where *p_mutex is not stored
83 in the execution->mutex_map for some reason. */
84 if (!execution->getMutexMap()->contains(p_mutex)) {
85 pthread_mutex_init(p_mutex, NULL);
88 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
99 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
100 ModelExecution *execution = model->get_execution();
101 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
102 return m->try_lock();
104 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
105 ModelExecution *execution = model->get_execution();
106 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
111 printf("try to unlock an untracked pthread_mutex\n");
117 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
118 const struct timespec *__restrict abstime) {
119 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
122 ModelExecution *execution = model->get_execution();
123 if (!execution->mutex_map.contains(p_mutex)) {
124 pthread_mutex_init(p_mutex, NULL);
126 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
131 printf("something is wrong with pthread_mutex_timedlock\n");
134 printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
139 pthread_t pthread_self() {
140 Thread* th = model->get_current_thread();
141 return (pthread_t)th->get_id();
144 int pthread_key_delete(pthread_key_t) {
145 model_print("key_delete is called\n");
149 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
150 cdsc::condition_variable *v = new cdsc::condition_variable();
152 ModelExecution *execution = model->get_execution();
153 execution->getCondMap()->put(p_cond, v);
157 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
158 ModelExecution *execution = model->get_execution();
159 if ( !execution->getCondMap()->contains(p_cond) )
160 pthread_cond_init(p_cond, NULL);
162 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
163 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
169 int pthread_cond_timedwait(pthread_cond_t *p_cond,
170 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
171 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
172 ModelExecution *execution = model->get_execution();
174 if ( !execution->getCondMap()->contains(p_cond) )
175 pthread_cond_init(p_cond, NULL);
176 if ( !execution->getMutexMap()->contains(p_mutex) )
177 pthread_mutex_init(p_mutex, NULL);
179 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
180 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
182 model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v));
184 // printf("timed_wait called\n");
188 int pthread_cond_signal(pthread_cond_t *p_cond) {
189 // notify only one blocked thread
190 ModelExecution *execution = model->get_execution();
191 if ( !execution->getCondMap()->contains(p_cond) )
192 pthread_cond_init(p_cond, NULL);
194 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);