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 int pthread_detach(pthread_t t) {
56 void pthread_exit(void *value_ptr) {
57 Thread * th = thread_current();
58 th->set_pthread_return(value_ptr);
59 model->switch_to_master(new ModelAction(THREADONLY_FINISH, std::memory_order_seq_cst, th));
60 //Need to exit so we don't return to the program
61 real_pthread_exit(NULL);
64 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
65 cdsc::snapmutex *m = new cdsc::snapmutex();
68 snapshot_system_init(10000, 1024, 1024, 40000);
69 model = new ModelChecker();
70 model->startChecker();
73 ModelExecution *execution = model->get_execution();
74 execution->getMutexMap()->put(p_mutex, m);
79 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
81 snapshot_system_init(10000, 1024, 1024, 40000);
82 model = new ModelChecker();
83 model->startChecker();
87 ModelExecution *execution = model->get_execution();
89 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
90 instead of pthread_mutex_init, or where *p_mutex is not stored
91 in the execution->mutex_map for some reason. */
92 if (!execution->getMutexMap()->contains(p_mutex)) {
93 pthread_mutex_init(p_mutex, NULL);
96 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
107 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
109 snapshot_system_init(10000, 1024, 1024, 40000);
110 model = new ModelChecker();
111 model->startChecker();
114 ModelExecution *execution = model->get_execution();
115 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
116 return m->try_lock();
118 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
119 ModelExecution *execution = model->get_execution();
120 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
125 printf("try to unlock an untracked pthread_mutex\n");
131 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
132 const struct timespec *__restrict abstime) {
133 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
136 ModelExecution *execution = model->get_execution();
137 if (!execution->mutex_map.contains(p_mutex)) {
138 pthread_mutex_init(p_mutex, NULL);
140 cdsc::snapmutex *m = execution->mutex_map.get(p_mutex);
145 printf("something is wrong with pthread_mutex_timedlock\n");
148 printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
153 pthread_t pthread_self() {
154 Thread* th = model->get_current_thread();
155 return (pthread_t)th->get_id();
158 int pthread_key_delete(pthread_key_t) {
159 model_print("key_delete is called\n");
163 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
164 cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable();
166 ModelExecution *execution = model->get_execution();
167 execution->getCondMap()->put(p_cond, v);
171 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
172 ModelExecution *execution = model->get_execution();
173 if ( !execution->getCondMap()->contains(p_cond) )
174 pthread_cond_init(p_cond, NULL);
176 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
177 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
183 int pthread_cond_timedwait(pthread_cond_t *p_cond,
184 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
185 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
186 ModelExecution *execution = model->get_execution();
188 if ( !execution->getCondMap()->contains(p_cond) )
189 pthread_cond_init(p_cond, NULL);
190 if ( !execution->getMutexMap()->contains(p_mutex) )
191 pthread_mutex_init(p_mutex, NULL);
193 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
194 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
196 model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v));
198 // printf("timed_wait called\n");
202 int pthread_cond_signal(pthread_cond_t *p_cond) {
203 // notify only one blocked thread
204 ModelExecution *execution = model->get_execution();
205 if ( !execution->getCondMap()->contains(p_cond) )
206 pthread_cond_init(p_cond, NULL);
208 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
214 int pthread_cond_broadcast(pthread_cond_t *p_cond) {
215 // notify all blocked threads
216 ModelExecution *execution = model->get_execution();
217 if ( !execution->getCondMap()->contains(p_cond) )
218 pthread_cond_init(p_cond, NULL);
220 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);