diff options
| author | Justus Winter <4winter@informatik.uni-hamburg.de> | 2015-08-15 18:30:28 +0200 |
|---|---|---|
| committer | Justus Winter <4winter@informatik.uni-hamburg.de> | 2015-08-17 15:57:15 +0200 |
| commit | e6c6e15b03639e98df68df35ba0f639bdbc1dc51 (patch) | |
| tree | 7a8a3c3d253e8d6e38390f17581e0dd2dcb295dc /configfrag.ac | |
| parent | 347cb29151859a56a6c5f0f355a43033e5e035a5 (diff) | |
kern: keep track of the writer when debugging locks
* configfrag.ac (MACH_LDEBUG): Adjust comment, we use it to sanity
check all locks now.
* kern/lock.c (lock_write): Keep track of the writer thread.
(lock_done): Clear writer.
(lock_read_to_write): Keep track of the writer thread.
(lock_write_to_read): Assert that the current thread holds the lock.
Clear writer.
(lock_try_write): Keep track of the writer thread.
(lock_try_read_to_write): Likewise.
(lock_set_recursive): Assert that the current thread holds the lock.
* kern/lock.h (struct lock): New field `writer'.
(have_read_lock, have_write_lock, have_lock): New macros that can be
used to assert that the current thread holds the given lock. If
MACH_LDEBUG is not set, they evaluate to true.
Diffstat (limited to 'configfrag.ac')
| -rw-r--r-- | configfrag.ac | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/configfrag.ac b/configfrag.ac index e41a3a1..c0e04b3 100644 --- a/configfrag.ac +++ b/configfrag.ac @@ -63,7 +63,7 @@ AC_DEFINE([MACH_IPC_DEBUG], [1], [MACH_IPC_DEBUG]) # Testing code/printfs. AC_DEFINE([MACH_IPC_TEST], [0], [MACH_IPC_TEST]) -# Sanity-check simple locking. +# Sanity-check locking. AC_DEFINE([MACH_LDEBUG], [0], [MACH_LDEBUG]) # MP lock monitoring. Registers use of locks, contention. Depending on |