Merge branch 'new_fuzzer' of /home/git/random-fuzzer into branch-weiyu
[c11tester.git] / pthread.cc
1 #include "common.h"
2 #include "threads-model.h"
3 #include "action.h"
4 #include "mypthread.h"
5
6 #include "snapshot-interface.h"
7 #include "datarace.h"
8
9 #include "mutex.h"
10 #include <condition_variable>
11 #include <assert.h>
12
13 /* global "model" object */
14 #include "model.h"
15 #include "execution.h"
16
17 int pthread_create(pthread_t *t, const pthread_attr_t * attr,
18                                                                          pthread_start_t start_routine, void * arg) {
19         struct pthread_params params = { start_routine, arg };
20
21         ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)&params);
22
23         /* seq_cst is just a 'don't care' parameter */
24         model->switch_to_master(act);
25
26         return 0;
27 }
28
29 int pthread_join(pthread_t t, void **value_ptr) {
30 //      Thread *th = model->get_pthread(t);
31         ModelExecution *execution = model->get_execution();
32         Thread *th = execution->get_pthread(t);
33
34         model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
35
36         if ( value_ptr ) {
37                 // store return value
38                 void *rtval = th->get_pthread_return();
39                 *value_ptr = rtval;
40         }
41         return 0;
42 }
43
44 void pthread_exit(void *value_ptr) {
45         Thread * th = thread_current();
46         model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th));
47         while(1) ;//make warning goaway
48 }
49
50 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
51         if (!model) {
52                 model = new ModelChecker();
53         }
54
55         cdsc::mutex *m = new cdsc::mutex();
56
57         ModelExecution *execution = model->get_execution();
58         execution->getMutexMap()->put(p_mutex, m);
59         return 0;
60 }
61
62 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
63         ModelExecution *execution = model->get_execution();
64
65         /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
66            instead of pthread_mutex_init, or where *p_mutex is not stored
67            in the execution->mutex_map for some reason. */
68         if (!execution->getMutexMap()->contains(p_mutex)) {
69                 pthread_mutex_init(p_mutex, NULL);
70         }
71
72         cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
73
74         if (m != NULL) {
75                 m->lock();
76         } else {
77                 printf("ah\n");
78         }
79
80         return 0;
81 }
82
83 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
84         ModelExecution *execution = model->get_execution();
85         cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
86         return m->try_lock();
87 }
88 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
89         ModelExecution *execution = model->get_execution();
90         cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
91
92         if (m != NULL) {
93                 m->unlock();
94         } else {
95                 printf("try to unlock an untracked pthread_mutex\n");
96         }
97
98         return 0;
99 }
100
101 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
102                                                                                                                  const struct timespec *__restrict abstime) {
103 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
104
105 /*
106         ModelExecution *execution = model->get_execution();
107         if (!execution->mutex_map.contains(p_mutex)) {
108                 pthread_mutex_init(p_mutex, NULL);
109         }
110         cdsc::mutex *m = execution->mutex_map.get(p_mutex);
111
112         if (m != NULL) {
113                 m->lock();
114         } else {
115                 printf("something is wrong with pthread_mutex_timedlock\n");
116         }
117
118         printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
119  */
120         return 0;
121 }
122
123 pthread_t pthread_self() {
124         Thread* th = model->get_current_thread();
125         return (pthread_t)th->get_id();
126 }
127
128 int pthread_key_delete(pthread_key_t) {
129         model_print("key_delete is called\n");
130         return 0;
131 }
132
133 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
134         cdsc::condition_variable *v = new cdsc::condition_variable();
135
136         ModelExecution *execution = model->get_execution();
137         execution->getCondMap()->put(p_cond, v);
138         return 0;
139 }
140
141 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
142         ModelExecution *execution = model->get_execution();
143         if ( !execution->getCondMap()->contains(p_cond) )
144                 pthread_cond_init(p_cond, NULL);
145
146         cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
147         cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
148
149         v->wait(*m);
150         return 0;
151 }
152
153 int pthread_cond_timedwait(pthread_cond_t *p_cond,
154                                                                                                          pthread_mutex_t *p_mutex, const struct timespec *abstime) {
155 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
156         ModelExecution *execution = model->get_execution();
157
158         if ( !execution->getCondMap()->contains(p_cond) )
159                 pthread_cond_init(p_cond, NULL);
160         if ( !execution->getMutexMap()->contains(p_mutex) )
161                 pthread_mutex_init(p_mutex, NULL);
162
163         cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
164         cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
165
166         model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v));
167 //      v->wait(*m);
168 //      printf("timed_wait called\n");
169         return 0;
170 }
171
172 int pthread_cond_signal(pthread_cond_t *p_cond) {
173         // notify only one blocked thread
174         ModelExecution *execution = model->get_execution();
175         if ( !execution->getCondMap()->contains(p_cond) )
176                 pthread_cond_init(p_cond, NULL);
177
178         cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
179
180         v->notify_one();
181         return 0;
182 }