X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=pthread.cc;h=b5fb7ce964200750a108412c63041de7cea56c3d;hb=c99f2a983be16a2c2c734ab4a9ab7f309026036d;hp=f0f968489d4857c86f60b5ee13972d735fada982;hpb=89ecd60fab0d93d6df6aa35e663ab67db860fa1d;p=c11tester.git diff --git a/pthread.cc b/pthread.cc index f0f96848..b5fb7ce9 100644 --- a/pthread.cc +++ b/pthread.cc @@ -8,14 +8,20 @@ #include "mutex.h" #include -#include /* global "model" object */ #include "model.h" #include "execution.h" +#include int pthread_create(pthread_t *t, const pthread_attr_t * attr, pthread_start_t start_routine, void * arg) { + if (!model) { + snapshot_system_init(10000, 1024, 1024, 40000); + model = new ModelChecker(); + model->startChecker(); + } + struct pthread_params params = { start_routine, arg }; ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)¶ms); @@ -27,7 +33,6 @@ int pthread_create(pthread_t *t, const pthread_attr_t * attr, } int pthread_join(pthread_t t, void **value_ptr) { -// Thread *th = model->get_pthread(t); ModelExecution *execution = model->get_execution(); Thread *th = execution->get_pthread(t); @@ -41,25 +46,47 @@ int pthread_join(pthread_t t, void **value_ptr) { return 0; } +int pthread_detach(pthread_t t) { + //Doesn't do anything + //Return success + return 0; +} + +/* Take care of both pthread_yield and c++ thread yield */ +int sched_yield() { + model->switch_to_master(new ModelAction(THREAD_YIELD, std::memory_order_seq_cst, thread_current(), VALUE_NONE)); + return 0; +} + void pthread_exit(void *value_ptr) { Thread * th = thread_current(); - model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th)); - while(1) ; //make warning goaway + th->set_pthread_return(value_ptr); + model->switch_to_master(new ModelAction(THREADONLY_FINISH, std::memory_order_seq_cst, th)); + //Need to exit so we don't return to the program + real_pthread_exit(NULL); } int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) { if (!model) { + snapshot_system_init(10000, 1024, 1024, 40000); model = new ModelChecker(); + model->startChecker(); } - - cdsc::mutex *m = new cdsc::mutex(); + cdsc::snapmutex *m = new cdsc::snapmutex(); ModelExecution *execution = model->get_execution(); execution->getMutexMap()->put(p_mutex, m); + return 0; } int pthread_mutex_lock(pthread_mutex_t *p_mutex) { + if (!model) { + snapshot_system_init(10000, 1024, 1024, 40000); + model = new ModelChecker(); + model->startChecker(); + } + ModelExecution *execution = model->get_execution(); /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used @@ -69,30 +96,37 @@ int pthread_mutex_lock(pthread_mutex_t *p_mutex) { pthread_mutex_init(p_mutex, NULL); } - cdsc::mutex *m = execution->getMutexMap()->get(p_mutex); + cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex); if (m != NULL) { m->lock(); } else { - printf("ah\n"); + return 1; } return 0; } int pthread_mutex_trylock(pthread_mutex_t *p_mutex) { + if (!model) { + snapshot_system_init(10000, 1024, 1024, 40000); + model = new ModelChecker(); + model->startChecker(); + } + ModelExecution *execution = model->get_execution(); - cdsc::mutex *m = execution->getMutexMap()->get(p_mutex); + cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex); return m->try_lock(); } int pthread_mutex_unlock(pthread_mutex_t *p_mutex) { ModelExecution *execution = model->get_execution(); - cdsc::mutex *m = execution->getMutexMap()->get(p_mutex); + cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex); if (m != NULL) { m->unlock(); } else { printf("try to unlock an untracked pthread_mutex\n"); + return 1; } return 0; @@ -102,22 +136,29 @@ int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex, const struct timespec *__restrict abstime) { // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next -/* - ModelExecution *execution = model->get_execution(); - if (!execution->mutex_map.contains(p_mutex)) { - pthread_mutex_init(p_mutex, NULL); - } - cdsc::mutex *m = execution->mutex_map.get(p_mutex); - - if (m != NULL) { - m->lock(); - } else { - printf("something is wrong with pthread_mutex_timedlock\n"); - } - - printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n"); - */ - return 0; + if (!model) { + snapshot_system_init(10000, 1024, 1024, 40000); + model = new ModelChecker(); + model->startChecker(); + } + + ModelExecution *execution = model->get_execution(); + + /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used + instead of pthread_mutex_init, or where *p_mutex is not stored + in the execution->mutex_map for some reason. */ + if (!execution->getMutexMap()->contains(p_mutex)) { + pthread_mutex_init(p_mutex, NULL); + } + + cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex); + + if (m != NULL) { + m->lock(); + return 0; + } + + return 1; } pthread_t pthread_self() { @@ -131,7 +172,7 @@ int pthread_key_delete(pthread_key_t) { } int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) { - cdsc::condition_variable *v = new cdsc::condition_variable(); + cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable(); ModelExecution *execution = model->get_execution(); execution->getCondMap()->put(p_cond, v); @@ -142,9 +183,11 @@ int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) { ModelExecution *execution = model->get_execution(); if ( !execution->getCondMap()->contains(p_cond) ) pthread_cond_init(p_cond, NULL); + if ( !execution->getMutexMap()->contains(p_mutex) ) + pthread_mutex_init(p_mutex, NULL); - cdsc::condition_variable *v = execution->getCondMap()->get(p_cond); - cdsc::mutex *m = execution->getMutexMap()->get(p_mutex); + cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond); + cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex); v->wait(*m); return 0; @@ -152,7 +195,6 @@ int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) { int pthread_cond_timedwait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex, const struct timespec *abstime) { -// implement cond_timedwait as a noop and let the scheduler decide which thread goes next ModelExecution *execution = model->get_execution(); if ( !execution->getCondMap()->contains(p_cond) ) @@ -160,12 +202,13 @@ int pthread_cond_timedwait(pthread_cond_t *p_cond, if ( !execution->getMutexMap()->contains(p_mutex) ) pthread_mutex_init(p_mutex, NULL); - cdsc::condition_variable *v = execution->getCondMap()->get(p_cond); - cdsc::mutex *m = execution->getMutexMap()->get(p_mutex); + cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond); + cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex); + + model->switch_to_master(new ModelAction(ATOMIC_TIMEDWAIT, std::memory_order_seq_cst, v, (uint64_t) m)); + m->lock(); - model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v)); -// v->wait(*m); -// printf("timed_wait called\n"); + // model_print("Timed_wait is called\n"); return 0; } @@ -175,8 +218,31 @@ int pthread_cond_signal(pthread_cond_t *p_cond) { if ( !execution->getCondMap()->contains(p_cond) ) pthread_cond_init(p_cond, NULL); - cdsc::condition_variable *v = execution->getCondMap()->get(p_cond); + cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond); v->notify_one(); return 0; } + +int pthread_cond_broadcast(pthread_cond_t *p_cond) { + // notify all blocked threads + ModelExecution *execution = model->get_execution(); + if ( !execution->getCondMap()->contains(p_cond) ) + pthread_cond_init(p_cond, NULL); + + cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond); + + v->notify_all(); + return 0; +} + +int pthread_cond_destroy(pthread_cond_t *p_cond) { + ModelExecution *execution = model->get_execution(); + + if (execution->getCondMap()->contains(p_cond)) { + cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond); + delete v; + execution->getCondMap()->remove(p_cond); + } + return 0; +}