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->maxfuturedelay = 6;
21 params->fairwindow = 0;
22 params->yieldon = false;
23 params->yieldblock = false;
24 params->enabledcount = 1;
26 params->maxfuturevalues = 0;
27 params->expireslop = 4;
28 params->verbose = !!DBG_ENABLED();
29 params->uninitvalue = 0;
30 params->maxexecutions = 0;
33 static void model_main()
35 struct model_params params;
37 param_defaults(¶ms);
39 //parse_options(¶ms, main_argc, main_argv);
41 //Initialize race detector
44 snapshot_stack_init();
46 model = new ModelChecker(params); // L: Model thread is created
47 // install_trace_analyses(model->get_execution()); L: disable plugin
56 int pthread_create(pthread_t *t, const pthread_attr_t * attr,
57 pthread_start_t start_routine, void * arg) {
58 struct pthread_params params = { start_routine, arg };
60 ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)¶ms);
62 /* seq_cst is just a 'don't care' parameter */
63 model->switch_to_master(act);
68 int pthread_join(pthread_t t, void **value_ptr) {
69 // Thread *th = model->get_pthread(t);
70 ModelExecution *execution = model->get_execution();
71 Thread *th = execution->get_pthread(t);
73 model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
77 void *rtval = th->get_pthread_return();
83 void pthread_exit(void *value_ptr) {
84 Thread * th = thread_current();
85 model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th));
88 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
90 snapshot_system_init(10000, 1024, 1024, 40000, &model_main);
93 cdsc::mutex *m = new cdsc::mutex();
95 ModelExecution *execution = model->get_execution();
96 execution->mutex_map.put(p_mutex, m);
100 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
101 ModelExecution *execution = model->get_execution();
103 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
104 instead of pthread_mutex_init, or where *p_mutex is not stored
105 in the execution->mutex_map for some reason. */
106 if (!execution->mutex_map.contains(p_mutex)) {
107 pthread_mutex_init(p_mutex, NULL);
110 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
121 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
122 ModelExecution *execution = model->get_execution();
123 cdsc::mutex *m = execution->mutex_map.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::mutex *m = execution->mutex_map.get(p_mutex);
133 printf("try to unlock an untracked pthread_mutex\n");
139 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
140 const struct timespec *__restrict abstime) {
141 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
144 ModelExecution *execution = model->get_execution();
145 if (!execution->mutex_map.contains(p_mutex)) {
146 pthread_mutex_init(p_mutex, NULL);
148 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
153 printf("something is wrong with pthread_mutex_timedlock\n");
156 printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
161 pthread_t pthread_self() {
162 Thread* th = model->get_current_thread();
166 int pthread_key_delete(pthread_key_t) {
167 model_print("key_delete is called\n");
171 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
172 cdsc::condition_variable *v = new cdsc::condition_variable();
174 ModelExecution *execution = model->get_execution();
175 execution->cond_map.put(p_cond, v);
179 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
180 ModelExecution *execution = model->get_execution();
181 if ( !execution->cond_map.contains(p_cond) )
182 pthread_cond_init(p_cond, NULL);
184 cdsc::condition_variable *v = execution->cond_map.get(p_cond);
185 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
191 int pthread_cond_timedwait(pthread_cond_t *p_cond,
192 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
193 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
194 ModelExecution *execution = model->get_execution();
196 if ( !execution->cond_map.contains(p_cond) )
197 pthread_cond_init(p_cond, NULL);
198 if ( !execution->mutex_map.contains(p_mutex) )
199 pthread_mutex_init(p_mutex, NULL);
201 cdsc::condition_variable *v = execution->cond_map.get(p_cond);
202 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
204 model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v, NULL));
206 // printf("timed_wait called\n");
210 int pthread_cond_signal(pthread_cond_t *p_cond) {
211 // notify only one blocked thread
212 ModelExecution *execution = model->get_execution();
213 if ( !execution->cond_map.contains(p_cond) )
214 pthread_cond_init(p_cond, NULL);
216 cdsc::condition_variable *v = execution->cond_map.get(p_cond);