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#import <Foundation/Foundation.h>
#import <pthread.h>
long my_global;
void *Thread1(void *arg) {
my_global = 42;
return NULL;
}
void *Thread2(void *arg) {
my_global = 144;
return NULL;
}
void TestDataRace1() {
pthread_t t1, t2;
pthread_create(&t1, NULL, Thread1, NULL);
pthread_create(&t2, NULL, Thread2, NULL);
pthread_join(t1, NULL);
pthread_join(t2, NULL);
}
void TestInvalidMutex() {
pthread_mutex_t m = {0};
pthread_mutex_lock(&m);
pthread_mutex_init(&m, NULL);
pthread_mutex_lock(&m);
pthread_mutex_unlock(&m);
pthread_mutex_destroy(&m);
pthread_mutex_lock(&m);
}
void TestMutexWrongLock() {
pthread_mutex_t m = {0};
pthread_mutex_init(&m, NULL);
pthread_mutex_unlock(&m);
}
long some_global;
void TestDataRaceBlocks1() {
dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
for (int i = 0; i < 2; i++) {
dispatch_async(q, ^{
some_global++; // race 1
usleep(100000); // force the blocks to be on different threads
});
}
usleep(100000);
dispatch_barrier_sync(q, ^{ });
}
void TestDataRaceBlocks2() {
dispatch_queue_t q = dispatch_queue_create("my.queue2", DISPATCH_QUEUE_CONCURRENT);
char *c;
c = malloc((rand() % 1000) + 10);
for (int i = 0; i < 2; i++) {
dispatch_async(q, ^{
c[0] = 'x'; // race 2
fprintf(stderr, "tid: %p\n", pthread_self());
usleep(100000); // force the blocks to be on different threads
});
}
dispatch_barrier_sync(q, ^{ });
free(c);
}
void TestUseAfterFree() {
char *c;
c = malloc((rand() % 1000) + 10);
free(c);
c[0] = 'x';
}
void TestRacePipe() {
dispatch_queue_t q = dispatch_queue_create("my.queue3", DISPATCH_QUEUE_CONCURRENT);
int a[2];
pipe(a);
int fd = a[0];
for (int i = 0; i < 2; i++) {
dispatch_async(q, ^{
write(fd, "abc", 3);
usleep(100000); // force the blocks to be on different threads
});
dispatch_async(q, ^{
close(fd);
usleep(100000);
});
}
dispatch_barrier_sync(q, ^{ });
}
void TestThreadLeak() {
pthread_t t1;
pthread_create(&t1, NULL, Thread1, NULL);
}
int main(int argc, const char * argv[]) {
TestDataRace1();
TestInvalidMutex();
TestMutexWrongLock();
TestDataRaceBlocks1();
TestDataRaceBlocks2();
TestUseAfterFree();
TestRacePipe();
TestThreadLeak();
return 0;
}
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