Does every thread have its main function?

Question

Does every thread have its own main function?

I know that its have its own stack, but what about main function (not necessarily a function which called main).

For example, when creating a thread, we pass a function as an argument for the new thread to run it.

I tried to search about this topic, but couldn't find answers.

Answer 1

Quote from this article:

In a multi-threaded process, all of the process’ threads share the same memory and open files. Within the shared memory, each thread gets its own stack. Each thread has its own instruction pointer and registers. Since the memory is shared, it is important to note that there is no memory protection among the threads in a process.

Therefore, the «main» function could be called the function with which the execution of the thread begins, i.e. the address of the first instruction of which is initially loaded into the instruction pointer. It is worth noting that the first code that is executed in a thread can be a routine in the standard library that initializes and then calls a user-supplied function, which in this case can be called the «main». But this is not a common term, it is usually called simply, a thread function.

However, there is a concept, the main thread. This is the first thread that is executed when the program (process) starts.