2 #include "threads-model.h"
6 #include "snapshot-interface.h"
10 #include <condition_variable>
12 /* global "model" object */
14 #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 ModelExecution *execution = model->get_execution();
37 Thread *th = execution->get_pthread(t);
39 model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
43 void *rtval = th->get_pthread_return();
49 int pthread_detach(pthread_t t) {
55 void pthread_exit(void *value_ptr) {
56 Thread * th = thread_current();
57 th->set_pthread_return(value_ptr);
58 model->switch_to_master(new ModelAction(THREADONLY_FINISH, std::memory_order_seq_cst, th));
59 //Need to exit so we don't return to the program
60 real_pthread_exit(NULL);
63 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
65 snapshot_system_init(10000, 1024, 1024, 40000);
66 model = new ModelChecker();
67 model->startChecker();
69 cdsc::snapmutex *m = new cdsc::snapmutex();
71 ModelExecution *execution = model->get_execution();
72 execution->getMutexMap()->put(p_mutex, m);
77 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
79 snapshot_system_init(10000, 1024, 1024, 40000);
80 model = new ModelChecker();
81 model->startChecker();
84 ModelExecution *execution = model->get_execution();
86 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
87 instead of pthread_mutex_init, or where *p_mutex is not stored
88 in the execution->mutex_map for some reason. */
89 if (!execution->getMutexMap()->contains(p_mutex)) {
90 pthread_mutex_init(p_mutex, NULL);
93 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
104 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
106 snapshot_system_init(10000, 1024, 1024, 40000);
107 model = new ModelChecker();
108 model->startChecker();
111 ModelExecution *execution = model->get_execution();
112 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
113 return m->try_lock();
115 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
116 ModelExecution *execution = model->get_execution();
117 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
122 printf("try to unlock an untracked pthread_mutex\n");
129 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
130 const struct timespec *__restrict abstime) {
131 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
134 snapshot_system_init(10000, 1024, 1024, 40000);
135 model = new ModelChecker();
136 model->startChecker();
139 ModelExecution *execution = model->get_execution();
141 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
142 instead of pthread_mutex_init, or where *p_mutex is not stored
143 in the execution->mutex_map for some reason. */
144 if (!execution->getMutexMap()->contains(p_mutex)) {
145 pthread_mutex_init(p_mutex, NULL);
148 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
158 pthread_t pthread_self() {
159 Thread* th = model->get_current_thread();
160 return (pthread_t)th->get_id();
163 int pthread_key_delete(pthread_key_t) {
164 model_print("key_delete is called\n");
168 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
169 cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable();
171 ModelExecution *execution = model->get_execution();
172 execution->getCondMap()->put(p_cond, v);
176 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
177 ModelExecution *execution = model->get_execution();
178 if ( !execution->getCondMap()->contains(p_cond) )
179 pthread_cond_init(p_cond, NULL);
180 if ( !execution->getMutexMap()->contains(p_mutex) )
181 pthread_mutex_init(p_mutex, NULL);
183 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
184 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
190 int pthread_cond_timedwait(pthread_cond_t *p_cond,
191 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
192 ModelExecution *execution = model->get_execution();
194 if ( !execution->getCondMap()->contains(p_cond) )
195 pthread_cond_init(p_cond, NULL);
196 if ( !execution->getMutexMap()->contains(p_mutex) )
197 pthread_mutex_init(p_mutex, NULL);
199 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
200 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
202 model->switch_to_master(new ModelAction(ATOMIC_TIMEDWAIT, std::memory_order_seq_cst, v, (uint64_t) m));
205 // model_print("Timed_wait is called\n");
209 int pthread_cond_signal(pthread_cond_t *p_cond) {
210 // notify only one blocked thread
211 ModelExecution *execution = model->get_execution();
212 if ( !execution->getCondMap()->contains(p_cond) )
213 pthread_cond_init(p_cond, NULL);
215 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
221 int pthread_cond_broadcast(pthread_cond_t *p_cond) {
222 // notify all blocked threads
223 ModelExecution *execution = model->get_execution();
224 if ( !execution->getCondMap()->contains(p_cond) )
225 pthread_cond_init(p_cond, NULL);
227 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
233 int pthread_cond_destroy(pthread_cond_t *p_cond) {
234 ModelExecution *execution = model->get_execution();
236 if (execution->getCondMap()->contains(p_cond)) {
237 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
239 execution->getCondMap()->remove(p_cond);