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 /* Take care of both pthread_yield and c++ thread yield */
57 model->switch_to_master(new ModelAction(THREAD_YIELD, std::memory_order_seq_cst, thread_current(), VALUE_NONE));
61 void pthread_exit(void *value_ptr) {
62 Thread * th = thread_current();
63 th->set_pthread_return(value_ptr);
64 model->switch_to_master(new ModelAction(THREADONLY_FINISH, std::memory_order_seq_cst, th));
65 //Need to exit so we don't return to the program
66 real_pthread_exit(NULL);
69 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t * attr) {
71 snapshot_system_init(10000, 1024, 1024, 40000);
72 model = new ModelChecker();
73 model->startChecker();
76 int mutex_type = PTHREAD_MUTEX_DEFAULT;
78 pthread_mutexattr_gettype(attr, &mutex_type);
80 cdsc::snapmutex *m = new cdsc::snapmutex(mutex_type);
82 ModelExecution *execution = model->get_execution();
83 execution->getMutexMap()->put(p_mutex, m);
88 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
90 snapshot_system_init(10000, 1024, 1024, 40000);
91 model = new ModelChecker();
92 model->startChecker();
95 ModelExecution *execution = model->get_execution();
97 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
98 instead of pthread_mutex_init, or where *p_mutex is not stored
99 in the execution->mutex_map for some reason. */
100 if (!execution->getMutexMap()->contains(p_mutex)) {
101 pthread_mutex_init(p_mutex, NULL);
104 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
115 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
117 snapshot_system_init(10000, 1024, 1024, 40000);
118 model = new ModelChecker();
119 model->startChecker();
122 ModelExecution *execution = model->get_execution();
123 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
124 return m->try_lock();
126 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
127 ModelExecution *execution = model->get_execution();
128 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
133 printf("try to unlock an untracked pthread_mutex\n");
140 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
141 const struct timespec *__restrict abstime) {
142 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
145 snapshot_system_init(10000, 1024, 1024, 40000);
146 model = new ModelChecker();
147 model->startChecker();
150 ModelExecution *execution = model->get_execution();
152 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
153 instead of pthread_mutex_init, or where *p_mutex is not stored
154 in the execution->mutex_map for some reason. */
155 if (!execution->getMutexMap()->contains(p_mutex)) {
156 pthread_mutex_init(p_mutex, NULL);
159 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
169 pthread_t pthread_self() {
171 snapshot_system_init(10000, 1024, 1024, 40000);
172 model = new ModelChecker();
173 model->startChecker();
176 Thread* th = model->get_current_thread();
177 return (pthread_t)th->get_id();
180 int pthread_key_delete(pthread_key_t) {
181 model_print("key_delete is called\n");
185 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
186 cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable();
188 ModelExecution *execution = model->get_execution();
189 execution->getCondMap()->put(p_cond, v);
193 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
194 ModelExecution *execution = model->get_execution();
195 if ( !execution->getCondMap()->contains(p_cond) )
196 pthread_cond_init(p_cond, NULL);
197 if ( !execution->getMutexMap()->contains(p_mutex) )
198 pthread_mutex_init(p_mutex, NULL);
200 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
201 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
207 int pthread_cond_timedwait(pthread_cond_t *p_cond,
208 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
209 ModelExecution *execution = model->get_execution();
211 if ( !execution->getCondMap()->contains(p_cond) )
212 pthread_cond_init(p_cond, NULL);
213 if ( !execution->getMutexMap()->contains(p_mutex) )
214 pthread_mutex_init(p_mutex, NULL);
216 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
217 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
219 model->switch_to_master(new ModelAction(ATOMIC_TIMEDWAIT, std::memory_order_seq_cst, v, (uint64_t) m));
222 // model_print("Timed_wait is called\n");
226 int pthread_cond_signal(pthread_cond_t *p_cond) {
227 // notify only one blocked thread
228 ModelExecution *execution = model->get_execution();
229 if ( !execution->getCondMap()->contains(p_cond) )
230 pthread_cond_init(p_cond, NULL);
232 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
238 int pthread_cond_broadcast(pthread_cond_t *p_cond) {
239 // notify all blocked threads
240 ModelExecution *execution = model->get_execution();
241 if ( !execution->getCondMap()->contains(p_cond) )
242 pthread_cond_init(p_cond, NULL);
244 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
250 int pthread_cond_destroy(pthread_cond_t *p_cond) {
251 ModelExecution *execution = model->get_execution();
253 if (execution->getCondMap()->contains(p_cond)) {
254 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
256 execution->getCondMap()->remove(p_cond);
261 /* https://github.com/lattera/glibc/blob/master/nptl/pthread_getattr_np.c */
262 int pthread_getattr_np(pthread_t t, pthread_attr_t *attr)
264 ModelExecution *execution = model->get_execution();
265 Thread *th = execution->get_pthread(t);
267 struct pthread_attr *iattr = (struct pthread_attr *) attr;
269 /* The sizes are subject to alignment. */
271 #if _STACK_GROWS_DOWN
274 iattr->stackaddr = (char *) th->get_stack_addr();
284 int pthread_setname_np(pthread_t t, const char *name)
286 ModelExecution *execution = model->get_execution();
287 Thread *th = execution->get_pthread(t);