From c417def39fa4e939d313fdee9d0373283ca31ff9 Mon Sep 17 00:00:00 2001
From: Thomas Applencourt <tapplencourt@anl.gov>
Date: Mon, 8 Jul 2024 13:00:53 -0500
Subject: [PATCH] Fix blocking in xprof

Stupid mistake on my side...
---
 xprof/xprof.rb.in | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/xprof/xprof.rb.in b/xprof/xprof.rb.in
index 0be9c2f9..f2ef6bf7 100755
--- a/xprof/xprof.rb.in
+++ b/xprof/xprof.rb.in
@@ -366,10 +366,11 @@ def env_tracers
     h["LTTNG_UST_#{name.upcase}_PROFILE"] = 1 if OPTIONS[:profile]
     h["LTTNG_UST_#{name.upcase}_VERBOSE"] = 1 if LOGGER.level <= Logger::DEBUG
   end
-
+  # Usr Apps need to be launched with this to support blocking.
+  h['LTTNG_UST_ALLOW_BLOCKING'] = 1
   # Customization
   h['LTTNG_UST_ZE_PARANOID_DRIFT'] = 1 if OPTIONS[:'backend-names'].include?('ze') && OPTIONS[:profile]
-
+  
   if OPTIONS[:'backend-names'].include?('omp')
     backends << 'omp'
     h['OMP_TOOL_LIBRARIES'] = File.join(LIBDIR, 'libTracerOMPT.so')