linux-kernel - [PATCH 04/11] tracing: Add lock class id in lock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1265188475-23509-5-git-send-regression-fweisbec@gmail.com>
Date:	Wed,  3 Feb 2010 10:14:28 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Paul Mackerras <paulus@...ba.org>,
	Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
	Li Zefan <lizf@...fujitsu.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: [PATCH 04/11] tracing: Add lock class id in lock_acquire event

Add the lock class id to lock_acquire event. This will let us
remove the name copy from every lock events (except lock_class_init)
as we'll be able to retrieve the name of the lock class with
the class id.

The class id is represented by the lock name address, which is
the same in the corresponding lock class.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc: Li Zefan <lizf@...fujitsu.com>
Cc: Lai Jiangshan <laijs@...fujitsu.com>
Cc: Masami Hiramatsu <mhiramat@...hat.com>
Cc: Jens Axboe <jens.axboe@...cle.com>
---
 include/trace/events/lock.h |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/include/trace/events/lock.h b/include/trace/events/lock.h
index 6999f16..3c4a5c1 100644
--- a/include/trace/events/lock.h
+++ b/include/trace/events/lock.h
@@ -52,15 +52,18 @@ TRACE_EVENT(lock_acquire,
 		__field(unsigned int, flags)
 		__string(name, lock->name)
 		__field(void *, lockdep_addr)
+		__field(void *, class_id)
 	),
 
 	TP_fast_assign(
 		__entry->flags = (trylock ? 1 : 0) | (read ? 2 : 0);
 		__assign_str(name, lock->name);
 		__entry->lockdep_addr = lock;
+		__entry->class_id = (void *)lock->name;
 	),
 
-	TP_printk("%p %s%s%s", __entry->lockdep_addr,
+	TP_printk("%p %p %s%s%s", __entry->lockdep_addr,
+		  __entry->class_id,
 		  (__entry->flags & 1) ? "try " : "",
 		  (__entry->flags & 2) ? "read " : "",
 		  __get_str(name))
-- 
1.6.2.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/