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3 Commits

Author SHA1 Message Date
Alfredo Alvarez Fernandez
11a1ac206d tools/lib/lockdep: Add tests for AA and ABBA locking 
Add test for AA and 2 threaded ABBA locking.

Rename AA.c to ABA.c since it was implementing an ABA instead of a pure
AA. Now both cases are covered.

The expected output for AA.c is that the process blocks and lockdep
reports a deadlock.

ABBA_2threads.c differs from ABBA.c in that lockdep keeps separate chains
of held locks per task. This can lead to different behaviour regarding
lock detection. The expected output for this test is that the process
blocks and lockdep reports a circular locking dependency.

These tests found a lockdep bug - fixed by the next commit.

Signed-off-by: Alfredo Alvarez Fernandez <alfredoalvarezfernandez@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1455864533-7536-3-git-send-email-alfredoalvarezernandez@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-02-29 10:29:33 +01:00
Sasha Levin
dbe941827e liblockdep: Add pthread_rwlock_t test suite 
A simple test to make sure we handle rwlocks correctly.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-7-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-27 11:55:24 +01:00
Sasha Levin
878f968eeb liblockdep: Add pthread_mutex_t test suite 
This is a rather simple and basic test suite to test common
locking issues.

Beyond tests, it also shows how to use the library.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-5-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-27 11:55:22 +01:00