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) {
19 struct pthread_params params = { start_routine, arg };
21 ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)¶ms);
23 /* seq_cst is just a 'don't care' parameter */
24 model->switch_to_master(act);
29 int pthread_join(pthread_t t, void **value_ptr) {
30 // Thread *th = model->get_pthread(t);
31 ModelExecution *execution = model->get_execution();
32 Thread *th = execution->get_pthread(t);
34 model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
38 void *rtval = th->get_pthread_return();
44 void pthread_exit(void *value_ptr) {
45 Thread * th = thread_current();
46 model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th));
49 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
51 model = new ModelChecker();
54 cdsc::mutex *m = new cdsc::mutex();
56 ModelExecution *execution = model->get_execution();
57 execution->getMutexMap()->put(p_mutex, m);
61 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
62 ModelExecution *execution = model->get_execution();
64 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
65 instead of pthread_mutex_init, or where *p_mutex is not stored
66 in the execution->mutex_map for some reason. */
67 if (!execution->getMutexMap()->contains(p_mutex)) {
68 pthread_mutex_init(p_mutex, NULL);
71 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
82 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
83 ModelExecution *execution = model->get_execution();
84 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
87 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
88 ModelExecution *execution = model->get_execution();
89 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
94 printf("try to unlock an untracked pthread_mutex\n");
100 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
101 const struct timespec *__restrict abstime) {
102 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
105 ModelExecution *execution = model->get_execution();
106 if (!execution->mutex_map.contains(p_mutex)) {
107 pthread_mutex_init(p_mutex, NULL);
109 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
114 printf("something is wrong with pthread_mutex_timedlock\n");
117 printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
122 pthread_t pthread_self() {
123 Thread* th = model->get_current_thread();
127 int pthread_key_delete(pthread_key_t) {
128 model_print("key_delete is called\n");
132 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
133 cdsc::condition_variable *v = new cdsc::condition_variable();
135 ModelExecution *execution = model->get_execution();
136 execution->getCondMap()->put(p_cond, v);
140 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
141 ModelExecution *execution = model->get_execution();
142 if ( !execution->getCondMap()->contains(p_cond) )
143 pthread_cond_init(p_cond, NULL);
145 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
146 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
152 int pthread_cond_timedwait(pthread_cond_t *p_cond,
153 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
154 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
155 ModelExecution *execution = model->get_execution();
157 if ( !execution->getCondMap()->contains(p_cond) )
158 pthread_cond_init(p_cond, NULL);
159 if ( !execution->getMutexMap()->contains(p_mutex) )
160 pthread_mutex_init(p_mutex, NULL);
162 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
163 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
165 model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v));
167 // printf("timed_wait called\n");
171 int pthread_cond_signal(pthread_cond_t *p_cond) {
172 // notify only one blocked thread
173 ModelExecution *execution = model->get_execution();
174 if ( !execution->getCondMap()->contains(p_cond) )
175 pthread_cond_init(p_cond, NULL);
177 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);