在支持多线程的操系统中，假设进程P创建了若干个线程，那么（ ）是不能被这些线程共享的。
- A.该进程中打开的文件
- B.该进程的代码段
- C.该进程中某线程的栈指针
- D.该进程的全局变量
正确答案及解析
正确答案
解析
线程是进程中的一个实体，是系统独立分配和调度的基本单位。线程基本上不拥有资源，只拥有一点运行中必不可少的资源（如：程序计数器、一组寄存器和栈），其他的资源可以与同一进程中其他线程共享。结合本题选项来看，只有选项C是线程独有不能被共享的。
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