From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 6 Sep 2012 23:09:28 +0000 (-0400)
Subject: tls-compat.h: document sigaltstack(2) limitation
X-Git-Tag: v0.7.5~3
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=9948a988350a1f6564a724f79cdeb2a294ee82aa;p=userspace-rcu.git

tls-compat.h: document sigaltstack(2) limitation

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/urcu/tls-compat.h b/urcu/tls-compat.h
index 2f40232..601336b 100644
--- a/urcu/tls-compat.h
+++ b/urcu/tls-compat.h
@@ -59,6 +59,9 @@ extern "C" {
  * Example: In any thread, the first call of URCU_TLS(rcu_reader)
  * is called from rcu_register_thread(), so we can ensure all later
  * URCU_TLS(rcu_reader) in any thread is async-signal-safe.
+ *
+ * Moreover, URCU_TLS variables should not be touched from signal
+ * handlers setup with with sigaltstack(2).
  */
 
 # define DECLARE_URCU_TLS(type, name)	\