2 #include "threads-model.h"
6 #include "snapshot-interface.h"
10 #include <condition_variable>
13 /* global "model" object */
15 #include "execution.h"
17 static void param_defaults(struct model_params *params)
20 params->fairwindow = 0;
21 params->yieldon = false;
22 params->yieldblock = false;
23 params->enabledcount = 1;
25 params->verbose = !!DBG_ENABLED();
26 params->uninitvalue = 0;
27 params->maxexecutions = 0;
30 static void model_main()
32 struct model_params params;
34 param_defaults(¶ms);
36 //parse_options(¶ms, main_argc, main_argv);
38 //Initialize race detector
41 snapshot_stack_init();
43 model = new ModelChecker(params); // L: Model thread is created
44 // install_trace_analyses(model->get_execution()); L: disable plugin
53 int pthread_create(pthread_t *t, const pthread_attr_t * attr,
54 pthread_start_t start_routine, void * arg) {
55 struct pthread_params params = { start_routine, arg };
57 ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)¶ms);
59 /* seq_cst is just a 'don't care' parameter */
60 model->switch_to_master(act);
65 int pthread_join(pthread_t t, void **value_ptr) {
66 // Thread *th = model->get_pthread(t);
67 ModelExecution *execution = model->get_execution();
68 Thread *th = execution->get_pthread(t);
70 model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
74 void *rtval = th->get_pthread_return();
80 void pthread_exit(void *value_ptr) {
81 Thread * th = thread_current();
82 model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th));
85 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
87 snapshot_system_init(10000, 1024, 1024, 40000, &model_main);
90 cdsc::mutex *m = new cdsc::mutex();
92 ModelExecution *execution = model->get_execution();
93 execution->getMutexMap()->put(p_mutex, m);
97 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
98 ModelExecution *execution = model->get_execution();
100 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
101 instead of pthread_mutex_init, or where *p_mutex is not stored
102 in the execution->mutex_map for some reason. */
103 if (!execution->getMutexMap()->contains(p_mutex)) {
104 pthread_mutex_init(p_mutex, NULL);
107 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
118 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
119 ModelExecution *execution = model->get_execution();
120 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
121 return m->try_lock();
123 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
124 ModelExecution *execution = model->get_execution();
125 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
130 printf("try to unlock an untracked pthread_mutex\n");
136 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
137 const struct timespec *__restrict abstime) {
138 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
141 ModelExecution *execution = model->get_execution();
142 if (!execution->mutex_map.contains(p_mutex)) {
143 pthread_mutex_init(p_mutex, NULL);
145 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
150 printf("something is wrong with pthread_mutex_timedlock\n");
153 printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
158 pthread_t pthread_self() {
159 Thread* th = model->get_current_thread();
163 int pthread_key_delete(pthread_key_t) {
164 model_print("key_delete is called\n");
168 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
169 cdsc::condition_variable *v = new cdsc::condition_variable();
171 ModelExecution *execution = model->get_execution();
172 execution->getCondMap()->put(p_cond, v);
176 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
177 ModelExecution *execution = model->get_execution();
178 if ( !execution->getCondMap()->contains(p_cond) )
179 pthread_cond_init(p_cond, NULL);
181 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
182 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
188 int pthread_cond_timedwait(pthread_cond_t *p_cond,
189 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
190 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
191 ModelExecution *execution = model->get_execution();
193 if ( !execution->getCondMap()->contains(p_cond) )
194 pthread_cond_init(p_cond, NULL);
195 if ( !execution->getMutexMap()->contains(p_mutex) )
196 pthread_mutex_init(p_mutex, NULL);
198 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
199 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
201 model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v, NULL));
203 // printf("timed_wait called\n");
207 int pthread_cond_signal(pthread_cond_t *p_cond) {
208 // notify only one blocked thread
209 ModelExecution *execution = model->get_execution();
210 if ( !execution->getCondMap()->contains(p_cond) )
211 pthread_cond_init(p_cond, NULL);
213 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);