#include "common.h"
#include "threads-model.h"
#include "action.h"
-#include "pthread.h"
-#include <mutex>
+#include "mypthread.h"
+
+#include "snapshot-interface.h"
+#include "datarace.h"
+
+#include "mutex.h"
+#include <condition_variable>
+#include <assert.h>
/* global "model" object */
#include "model.h"
#include "execution.h"
+extern "C" {
+int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
+}
+
+int nanosleep(const struct timespec *rqtp, struct timespec *rmtp) {
+ if (model) {
+ uint64_t time = rqtp->tv_sec * 1000000000 + rqtp->tv_nsec;
+ struct timespec currtime;
+ clock_gettime(CLOCK_MONOTONIC, &currtime);
+ uint64_t lcurrtime = currtime.tv_sec * 1000000000 + currtime.tv_nsec;
+ model->switch_to_master(new ModelAction(THREAD_SLEEP, std::memory_order_seq_cst, time, lcurrtime));
+ if (rmtp != NULL) {
+ clock_gettime(CLOCK_MONOTONIC, &currtime);
+ uint64_t lendtime = currtime.tv_sec * 1000000000 + currtime.tv_nsec;
+ uint64_t elapsed = lendtime - lcurrtime;
+ rmtp->tv_sec = elapsed / 1000000000;
+ rmtp->tv_nsec = elapsed - rmtp->tv_sec * 1000000000;
+ }
+ }
+ return 0;
+}
int pthread_create(pthread_t *t, const pthread_attr_t * attr,
- pthread_start_t start_routine, void * arg) {
+ 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);
// store return value
void *rtval = th->get_pthread_return();
*value_ptr = rtval;
- }
+ }
+ return 0;
+}
+
+int pthread_detach(pthread_t t) {
+ //Doesn't do anything
+ //Return success
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));
+ 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 *) {
- std::mutex *m = new std::mutex();
+ cdsc::snapmutex *m = new cdsc::snapmutex();
+
+ if (!model) {
+ snapshot_system_init(10000, 1024, 1024, 40000);
+ model = new ModelChecker();
+ model->startChecker();
+ }
ModelExecution *execution = model->get_execution();
- execution->mutex_map.put(p_mutex, m);
+ 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();
- std::mutex *m = execution->mutex_map.get(p_mutex);
- m->lock();
- /* error message? */
+
+ /* 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();
+ } else {
+ printf("ah\n");
+ }
+
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();
- std::mutex *m = execution->mutex_map.get(p_mutex);
+ cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
return m->try_lock();
-
- /* error message? */
}
-int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
+int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
ModelExecution *execution = model->get_execution();
- std::mutex *m = execution->mutex_map.get(p_mutex);
- m->unlock();
+ cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
+ if (m != NULL) {
+ m->unlock();
+ } else {
+ printf("try to unlock an untracked pthread_mutex\n");
+ }
+
+ return 0;
+}
+
+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::snapmutex *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;
}
pthread_t pthread_self() {
Thread* th = model->get_current_thread();
- return th->get_id();
+ return (pthread_t)th->get_id();
}
int pthread_key_delete(pthread_key_t) {
model_print("key_delete is called\n");
return 0;
}
+
+int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
+ cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable();
+
+ ModelExecution *execution = model->get_execution();
+ execution->getCondMap()->put(p_cond, v);
+ return 0;
+}
+
+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);
+
+ cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
+ cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
+
+ v->wait(*m);
+ return 0;
+}
+
+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) )
+ pthread_cond_init(p_cond, NULL);
+ if ( !execution->getMutexMap()->contains(p_mutex) )
+ pthread_mutex_init(p_mutex, NULL);
+
+ cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
+ // cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
+
+ model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v));
+// v->wait(*m);
+// printf("timed_wait called\n");
+ return 0;
+}
+
+int pthread_cond_signal(pthread_cond_t *p_cond) {
+ // notify only one blocked thread
+ 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_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;
+}
projects / c11tester.git / blobdiff