logging wrapper for linux (#2889)

docs/Diagnostics.md

@@ -129,6 +129,14 @@ As already indicated, there are lots of ways to collect ETW traces. Feel free to
 
 ## Linux
 
+This script wraps steps bellows  
+**WARN**: This wrapper doesn't work with `./scripts/test.ps1` etc. as it is also creating lttng session internally.
+```
+./scripts/log_wrapper.sh ${Your binary}
+# e.g.
+./scripts/log_wrapper.sh ./artifacts/bin/linux/x64_Debug_openssl/msquictest --gtest_filter=Basic.*
+```
+
 To start collecting a trace, you can use the following commands:
 
 ```

scripts/log_wrapper.sh

@@ -0,0 +1,15 @@
+# This is for Linux
+
+lttng destroy msquic 2> /dev/null
+
+dirname="msquic_lttng"
+num=`find ./* -maxdepth 0 -name "$dirname*" | wc -l`
+mkdir $dirname$num && lttng create msqui -o=./$dirname$num && sessionCreated=$? && lttng enable-event --userspace "CLOG_*" && lttng add-context --userspace --type=vpid --type=vtid && lttng start 
+if [ $? -eq 0 ]; then
+    $*
+    lttng stop
+fi
+
+if [ $sessionCreated -eq 0 ]; then
+    lttng destroy msquic
+fi