僵尸仅适用于主线程吗

Question

我编写了一个示例代码来验证僵尸线程，发现只有已关闭的代码显示在主线程上，而不显示在其他线程上。

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
                        && ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(MainActivity.this, new String[] {Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
                } else {
                    Intent intent = new Intent(MainActivity.this, Main2Activity.class);
                    intent.putExtra("name", arrayList.get(position));
                    startActivity(intent);
                }

            }
        });

'ps -AL'的输出

#include <pthread.h>
#include <stdio.h>

void *print(void *arg)
{
    int *i = (int *) arg;
    printf("Hi.  I'm thread %d\n", *i);
    sleep(20);
    pthread_exit(NULL);
}

int main()
{
    int i;
    pthread_t tids[4], value[4];
    void *retval;

    for (i = 0; i < 4; i++) {
        value[i] = i;
        pthread_create(tids+i, NULL, print, (value+i));
    }

    pthread_exit(NULL);
    for (i = 0; i < 4; i++) {
        printf("Trying to join with tid %d\n", i);
        //pthread_join(tids[i], &retval);
        printf("Joined with tid %d\n", i);
    }
    return 0;
}

当我尝试更改逻辑以在主线程之前先终止另一个线程时，它在'ps -AL'输出中未显示为已取消