Commit Graph

5 Commits

Author SHA1 Message Date
Alexander Boettcher
c06c2887f2 NOVA: don't use externals in sleep forever
Not required.
2012-08-09 14:14:28 +02:00
Alexander Boettcher
4342d0d234 NOVA: let thread die if SM cap is invalid
Patch prevents following bugs:

* In sleep_forever the thread return from semaphore down if cap is revoked
  during destruction of a thread. This causes an endless loop consuming time
  not available for other threads.
* In lock_helper and cap_sel_alloc the thread return from the lock() method
  even if the semaphore down call failed because of an revoked semaphore.

  This lead to the situation that a thread subject to de-construction returns
  from the lock method, but not holding the lock, entering the critical section
  and modifying state inside the critical section. Another thread in parallel
  already in the critical section or entering the critical section also
  modifies the state. This lead to curious bugs ...
* thread_nova, thread_start, irq_session
  Detect early bugs if the SM is gone unexpectedly where it should never
  happen.
2012-08-09 11:09:42 +02:00
Alexander Boettcher
b6ea5714d7 NOVA: create sm solely in core
Any kernel objects are now created solely by core - namely pt, ec, sm and sc.
2012-08-09 11:09:41 +02:00
Norman Feske
08ce32215d Bump year in copyright headers to 2012 2012-01-03 15:35:05 +01:00
Genode Labs
da4e1feaa5 Imported Genode release 11.11 2011-12-22 16:19:25 +01:00