From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Tue, 20 Mar 2012 18:13:54 +0000 (-0400)
Subject: Document LTTNG_UST_DEBUG_VALGRIND compilation flag
X-Git-Tag: v2.0.0-rc4~2
X-Git-Url: http://git.lttng.org/?p=lttng-ust.git;a=commitdiff_plain;h=fdb4af102796c056de5c1d7361a57bf9779788d1

Document LTTNG_UST_DEBUG_VALGRIND compilation flag

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

diff --git a/README b/README
index ad9acd77..78160a30 100644
--- a/README
+++ b/README
@@ -113,6 +113,10 @@ ENVIRONMENT VARIABLES:
     recommended for applications with time constraints on the process
     startup time.
 
+  - The compilation flag "-DLTTNG_UST_DEBUG_VALGRIND" should be enabled
+    at build time to allow liblttng-ust to be used with valgrind
+    (side-effect: disables per-cpu buffering).
+
 
 TRACE VIEWER:
 
diff --git a/libringbuffer/getcpu.h b/libringbuffer/getcpu.h
index 104ba760..44d0d559 100644
--- a/libringbuffer/getcpu.h
+++ b/libringbuffer/getcpu.h
@@ -22,7 +22,7 @@
 #include <urcu/compiler.h>
 #include <sched.h>
 
-#ifdef UST_VALGRIND
+#ifdef LTTNG_UST_DEBUG_VALGRIND
 
 /*
  * Fallback on cpu 0 if liblttng-ust is build with Valgrind support.