add readmes

diff --git a/hello/README b/hello/README
new file mode 100644 (file)
index 0000000..68b11e6
--- /dev/null
+++ b/hello/README
@@ -0,0 +1 @@
+This is a hello world application used to test the LTTng userspace tracer.

diff --git a/libmallocwrap/README b/libmallocwrap/README
new file mode 100644 (file)
index 0000000..333a01e
--- /dev/null
+++ b/libmallocwrap/README
@@ -0,0 +1,8 @@
+libmallocwrap is used for instrumenting calls to malloc(3) in a program, without
+need for recompiling it.
+
+libmallocwrap defines a malloc() function that is instrumented with a marker. It
+also calls the libc malloc afterwards. When loaded with LD_PRELOAD, it replaces
+the libc malloc() function, in effect instrumenting all calls to malloc().
+
+See the "run" script for a usage example.