每个线程都有自己的堆栈吗? [英] Does each thread have its own stack?

问题描述

当我从一个进程创建多个线程时，每个线程是否都有自己的堆栈，或者它们共享父进程的堆栈.线程进行系统调用时会发生什么?线程也像进程一样维护自己的内核堆栈吗?

When I create multiple threads from a process, then does each thread have its own stack, or is it that they share the stack of their parent process. What happens when a thread makes a system call? Do threads also maintain their own kernel stack like processes?

推荐答案

是的，线程具有自己的堆栈和内核堆栈(例如linux).

Yes threads have their own stacks and their own kernel stacks (e.g. linux).

当线程进行系统调用时，您陷入了内核模式(从用户模式进入)，将参数传递给内核，对参数进行了检查，内核确实需要执行(在内核堆栈中))，将最终值返回给线程，然后返回用户模式.

When a thread makes a system call, you trap into kernel mode (from user mode), you pass the arguments to the kernel, the arguments are checked, the kernel does w/e it needs to do (in the kernel stack), returns the final value back to the thread and you go back to user mode.

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