]> git.lttng.org Git - lttng-ust.git/commitdiff
Fix effect: update README about dlopen()
authorMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Thu, 1 Mar 2012 17:15:34 +0000 (12:15 -0500)
committerMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Thu, 1 Mar 2012 17:41:16 +0000 (12:41 -0500)
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
README

diff --git a/README b/README
index e2b52aa026f74a3ff598c774bc034baefe01c5aa..ad9acd77b5664753b5947d5fe9c4c2a3ffa1f73c 100644 (file)
--- a/README
+++ b/README
@@ -90,15 +90,11 @@ USAGE:
     - Link application with "-ldl".
     - 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.
 
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