The pthread_attr_setstack() shall set the thread creation stack attributes stackaddr and stacksize in the attr ojbect. The stack attributes specify the area of storage to be used for the created thread's stack. The stack attributes specify the area of storage to be used for the created thread's stack. The base of the storage shall be stackaddr, and the size of the storage shall be stacksize bytes. The stacksize shall be at least {PTHREAD_STACK_MIN}. The stackaddr shall be aligned appropriately to be used as a stack. All pages within the stack described by stackaddr and stacksize shall be both readable and writable by the thread. If success, it returns zero. if fail, an error number shall be returned to indicate the error. The pthread_attr_setstack() function shall fail if: [EINVAL] The value of stacksize is less than {PTHREAD_STACK_MIN} or exceeds an implementation-defined limit. The function may fail if: [EINVAL] The value of stackaddr does not have proper alignment to be used as a stack or if (stackaddr + stacksize) lacks proper alignment. The function may fail if: [EACCES] The stack page(s) described by stackaddr and stacksize are not both readable and writable by the thread. Shall not return an error code of [EINTR]