linux-kernel - [RFC][PATCH 2/2] tracing/lock: provide lock_acquired event support for dynamic size string

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: <1239838050-8567-2-git-send-email-fweisbec@gmail.com>
Date:	Thu, 16 Apr 2009 01:27:30 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>
Cc:	Zhaolei <zhaolei@...fujitsu.com>, Tom Zanussi <tzanussi@...il.com>,
	Li Zefan <lizf@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [RFC][PATCH 2/2] tracing/lock: provide lock_acquired event support for dynamic size string

Now that we can support the dynamic sized string, make the lock tracing
able to use it, making it safe against modules removal and consuming
the right amount of memory needed for each lock name

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 include/trace/events/lockdep.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/trace/events/lockdep.h b/include/trace/events/lockdep.h
index 45e326b..48356b7 100644
--- a/include/trace/events/lockdep.h
+++ b/include/trace/events/lockdep.h
@@ -38,12 +38,12 @@ TRACE_EVENT(lock_acquired,
 	TP_ARGS(lock, ip, waittime),
 
 	TP_STRUCT__entry(
-		__field(const char *, name)
 		__field(unsigned long, wait_usec)
 		__field(unsigned long, wait_nsec_rem)
+		__ending_string(name)
 	),
 	TP_fast_assign(
-		__entry->name = lock->name;
+		open_string_assign(lock_acquired, name, lock->name);
 		__entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC);
 		__entry->wait_usec = (unsigned long) waittime;
 	),
-- 
1.6.1

--
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/