Christian Prochaska 6616b0efe7 pthread: improve stack attribute handling
- initialize the stack size attribute with `Libc::Component::stack_size()`
  as default value
- remove the possibly uninitialized `pthread` member from the attribute
  structure and obtain current attribute values in the
 `pthread_attr_get_np()` function, where the `pthread` object reference
  is given as argument
- let each thread obtain its stack address and actual stack size at thread
  start to have the information available for other threads

Fixes #2865
2018-06-29 10:44:56 +02:00
..
2018-05-30 13:36:22 +02:00