linux.git/tools/lib/lockdep, branch v3.14-rc2

liblockdep: Add the 'lockdep' user-space utility

2013-11-27T10:56:25+00:00

This is a simple wrapper to make using liblockdep on existing
applications much easier.

After running 'make && make install', it becomes quite simple to
test things with liblockdep. For example, to try it on perf:

	lockdep perf

No other integration required.

Signed-off-by: Sasha Levin 
Signed-off-by: Peter Zijlstra 
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-9-git-send-email-sasha.levin@oracle.com
[ Changed it to load ./liblockdep.so, so it can be tested in situ. ]
Signed-off-by: Ingo Molnar

liblockdep: Support using LD_PRELOAD

2013-11-27T10:55:24+00:00

This allows lockdep to be used without being compiled in the
original program.

Usage is quite simple:

	LD_PRELOAD=/path/to/liblockdep.so /path/to/my/program

And magically, you'll have lockdep checking in your program!

Signed-off-by: Sasha Levin 
Signed-off-by: Peter Zijlstra 
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-8-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar

liblockdep: Add pthread_rwlock_t test suite

2013-11-27T10:55:24+00:00

A simple test to make sure we handle rwlocks correctly.

Signed-off-by: Sasha Levin 
Signed-off-by: Peter Zijlstra 
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

liblockdep: Add public headers for pthread_rwlock_t implementation

2013-11-27T10:55:23+00:00

Both pthreads and lockdep support dealing with rwlocks, so
here's the liblockdep implementation for those.

Signed-off-by: Sasha Levin 
Signed-off-by: Peter Zijlstra 
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-6-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar

liblockdep: Add pthread_mutex_t test suite

2013-11-27T10:55:22+00:00

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 
Signed-off-by: Peter Zijlstra 
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

liblockdep: Add public headers for pthread_mutex_t implementation

2013-11-27T10:55:22+00:00

These headers provide the same API as their pthread mutex
counterparts.

The design here is to allow to easily switch to liblockdep lock
validation just by adding a "liblockdep_" to pthread_mutex_*()
calls, which means that it's easy to integrate liblockdep into
existing codebases.

Signed-off-by: Sasha Levin 
Signed-off-by: Peter Zijlstra 
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-4-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar

liblockdep: Wrap kernel/locking/lockdep.c to allow usage from userspace

2013-11-27T10:55:21+00:00

kernel/locking/lockdep.c deals with validating locking scenarios for
various architectures supported by the kernel. There isn't
anything kernel specific going on in lockdep, and when we
compare userspace to other architectures that don't have to deal
with irqs such as s390, they become all too similar.

We wrap kernel/locking/lockdep.c and include/linux/lockdep.h with
several headers which allow us to build and use lockdep from
userspace. We don't touch the kernel code itself which means
that any work done on lockdep in the kernel will automatically
benefit userspace lockdep as well!

Signed-off-by: Sasha Levin 
Signed-off-by: Peter Zijlstra 
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-3-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar