From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 1 Mar 2012 17:15:34 +0000 (-0500)
Subject: Fix effect: update README about dlopen()
X-Git-Tag: v2.1.0-rc1~97^2~4
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=a025b017d398818300ad45c92284116d64c56fc1;p=lttng-ust.git

Fix effect: update README about dlopen()

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

diff --git a/README b/README
index 78ed56f6..8193c660 100644
--- a/README
+++ b/README
@@ -90,15 +90,11 @@ USAGE:
     - Link application with "-ldl" on Linux, "-lc" on BSD.
     - Set a LD_PRELOAD environment to preload the tracepoint provider
       shared object before starting the application when tracing is
-      needed.
+      needed. Another way is to dlopen the tracepoint probe when needed
+      by the application.
     - Example:
       - tests/demo/   demo.c  tp*.c ust_tests_demo*.h demo-trace
 
-  - Note about dlopen() usage: due to locking side-effects due to the
-    way libc lazily resolves Thread-Local Storage (TLS) symbols when a
-    library is dlopen'd, linking the tracepoint probe or liblttng-ust
-    with dlopen() is discouraged. They should be linked with the
-    application using "-llibname" or loaded with LD_PRELOAD.
   - Enable instrumentation and control tracing with the "lttng" command
     from lttng-tools. See lttng-tools doc/quickstart.txt.