Commit Graph

13 Commits

Author SHA1 Message Date
Wang Nan
7b8853419d tools/liblockdep: Use realpath for srctree and objtree
If BUILD_SRC or CURDIR contains tailing '/', the file names passed to gcc will
contain '//'. It will be contained .o's in debuginfo, then confuse debugedit:

https://bugzilla.redhat.com/show_bug.cgi?id=304121

This patch uses realpath command to makesure potential tailing '/'s are removed.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Geng Hui <hui.geng@huawei.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
2014-02-26 21:22:01 -05:00
Sasha Levin
9e3513b7af tools/liblockdep: Add a stub for new rcu_is_watching
Stub out rcu_is_watching(), prevents build error with the updated
tree.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
2014-02-26 21:22:00 -05:00
Sasha Levin
1ddc1ffa2f tools/liblockdep: Mark runtests.sh as executable
runtests.sh is used to run the sanity tests for liblockdep
and should be set +x.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
2014-02-26 21:21:59 -05:00
Ira W. Snyder
aef5976fc5 tools/liblockdep: Add include directory to allow tests to compile
All of the programs in the tests directory require the
liblockdep/mutex.h header in order to compile. Add the include directory
to the compiler options so that the tests can be built with the provided
Makefile.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
2014-02-26 21:21:56 -05:00
Ira W. Snyder
75759827bb tools/liblockdep: Fix include of asm/hash.h
Commit 71ae8aac ("lib: introduce arch optimized hash library")
added an include to <linux/hash.h> for setting up an architecture
specific fast hash.

This patch mirrors the fix used for perf, titled "tools: perf: util: fix
include for non x86 architectures".

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
2014-02-26 21:21:53 -05:00
Ira W. Snyder
367d896daf tools/liblockdep: Fix initialization code path
This makes initialization actually happen. Without it, initialization is
always skipped due to an incorrect conditional statement.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
2014-02-26 21:21:49 -05:00
Sasha Levin
f612ac05b7 liblockdep: Add the 'lockdep' user-space utility
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 <sasha.levin@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-9-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 <mingo@kernel.org>
2013-11-27 11:56:25 +01:00
Sasha Levin
231941eec8 liblockdep: Support using LD_PRELOAD
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 <sasha.levin@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-8-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
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
5a52c9b480 liblockdep: Add public headers for pthread_rwlock_t implementation
Both pthreads and lockdep support dealing with rwlocks, so
here's the liblockdep implementation for those.

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/1371163284-6346-6-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-27 11:55:23 +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
Sasha Levin
45e6207464 liblockdep: Add public headers for pthread_mutex_t implementation
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 <sasha.levin@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-4-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-27 11:55:22 +01:00
Sasha Levin
5634bd7d2a liblockdep: Wrap kernel/locking/lockdep.c to allow usage from userspace
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 <sasha.levin@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-3-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-27 11:55:21 +01:00