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 *) {
71 snapshot_system_init(10000, 1024, 1024, 40000);
72 model = new ModelChecker();
73 model->startChecker();
75 cdsc::snapmutex *m = new cdsc::snapmutex();
77 ModelExecution *execution = model->get_execution();
78 execution->getMutexMap()->put(p_mutex, m);
83 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
85 snapshot_system_init(10000, 1024, 1024, 40000);
86 model = new ModelChecker();
87 model->startChecker();
90 ModelExecution *execution = model->get_execution();
92 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
93 instead of pthread_mutex_init, or where *p_mutex is not stored
94 in the execution->mutex_map for some reason. */
95 if (!execution->getMutexMap()->contains(p_mutex)) {
96 pthread_mutex_init(p_mutex, NULL);
99 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
110 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
112 snapshot_system_init(10000, 1024, 1024, 40000);
113 model = new ModelChecker();
114 model->startChecker();
117 ModelExecution *execution = model->get_execution();
118 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
119 return m->try_lock();
121 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
122 ModelExecution *execution = model->get_execution();
123 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
128 printf("try to unlock an untracked pthread_mutex\n");
135 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
136 const struct timespec *__restrict abstime) {
137 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
140 snapshot_system_init(10000, 1024, 1024, 40000);
141 model = new ModelChecker();
142 model->startChecker();
145 ModelExecution *execution = model->get_execution();
147 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
148 instead of pthread_mutex_init, or where *p_mutex is not stored
149 in the execution->mutex_map for some reason. */
150 if (!execution->getMutexMap()->contains(p_mutex)) {
151 pthread_mutex_init(p_mutex, NULL);
154 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
164 pthread_t pthread_self() {
166 snapshot_system_init(10000, 1024, 1024, 40000);
167 model = new ModelChecker();
168 model->startChecker();
171 Thread* th = model->get_current_thread();
172 return (pthread_t)th->get_id();
175 int pthread_key_delete(pthread_key_t) {
176 model_print("key_delete is called\n");
180 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
181 cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable();
183 ModelExecution *execution = model->get_execution();
184 execution->getCondMap()->put(p_cond, v);
188 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
189 ModelExecution *execution = model->get_execution();
190 if ( !execution->getCondMap()->contains(p_cond) )
191 pthread_cond_init(p_cond, NULL);
192 if ( !execution->getMutexMap()->contains(p_mutex) )
193 pthread_mutex_init(p_mutex, NULL);
195 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
196 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
202 int pthread_cond_timedwait(pthread_cond_t *p_cond,
203 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
204 ModelExecution *execution = model->get_execution();
206 if ( !execution->getCondMap()->contains(p_cond) )
207 pthread_cond_init(p_cond, NULL);
208 if ( !execution->getMutexMap()->contains(p_mutex) )
209 pthread_mutex_init(p_mutex, NULL);
211 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
212 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
214 model->switch_to_master(new ModelAction(ATOMIC_TIMEDWAIT, std::memory_order_seq_cst, v, (uint64_t) m));
217 // model_print("Timed_wait is called\n");
221 int pthread_cond_signal(pthread_cond_t *p_cond) {
222 // notify only one blocked thread
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_broadcast(pthread_cond_t *p_cond) {
234 // notify all blocked threads
235 ModelExecution *execution = model->get_execution();
236 if ( !execution->getCondMap()->contains(p_cond) )
237 pthread_cond_init(p_cond, NULL);
239 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
245 int pthread_cond_destroy(pthread_cond_t *p_cond) {
246 ModelExecution *execution = model->get_execution();
248 if (execution->getCondMap()->contains(p_cond)) {
249 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
251 execution->getCondMap()->remove(p_cond);
256 /* https://github.com/lattera/glibc/blob/master/nptl/pthread_getattr_np.c */
257 int pthread_getattr_np(pthread_t t, pthread_attr_t *attr)
259 ModelExecution *execution = model->get_execution();
260 Thread *th = execution->get_pthread(t);
262 struct pthread_attr *iattr = (struct pthread_attr *) attr;
264 /* The sizes are subject to alignment. */
266 #if _STACK_GROWS_DOWN
269 iattr->stackaddr = (char *) th->get_stack_addr();
279 int pthread_setname_np(pthread_t t, const char *name)
281 ModelExecution *execution = model->get_execution();
282 Thread *th = execution->get_pthread(t);