debian/patches/0002-explicitly-load-libgomp.patch

From 63aa2e3ac630dcad758b446fc56136e58058fffd Mon Sep 17 00:00:00 2001
From: Cindy Liu <hcindyl@google.com>
Date: Wed, 19 Aug 2020 17:22:29 -0700
Subject: [PATCH] Explicitly load libgomp.so.1 in gst-plugin-scanner

libgomp has a long lasting TLS bug
(https://bugzilla.redhat.com/show_bug.cgi?id=1722181). Preload the
library in gst-plugin-scanner to resolve the TLS memory issue while
launching gstreamer.

Change-Id: I8ebedaf320a6b4253e8804946e4ff79bbde48ad7
---
 libs/gst/helpers/Makefile.am          | 4 +++-
 libs/gst/helpers/gst-plugin-scanner.c | 6 +++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/libs/gst/helpers/Makefile.am b/libs/gst/helpers/Makefile.am
index d72a6527..a7c6d6ce 100644
--- a/libs/gst/helpers/Makefile.am
+++ b/libs/gst/helpers/Makefile.am
@@ -3,7 +3,9 @@ helpersdir=$(libexecdir)/gstreamer-$(GST_API_VERSION)
 
 gst_plugin_scanner_SOURCES = gst-plugin-scanner.c
 gst_plugin_scanner_CFLAGS = $(GST_OBJ_CFLAGS)
-gst_plugin_scanner_LDADD = $(GST_OBJ_LIBS)
+gst_plugin_scanner_LDADD = \
+	$(GST_OBJ_LIBS) \
+	-lgomp
 
 if ENABLE_BASH_COMPLETION
 helpers_PROGRAMS += gst-completion-helper
diff --git a/libs/gst/helpers/gst-plugin-scanner.c b/libs/gst/helpers/gst-plugin-scanner.c
index cbefb29e..0ad0480c 100644
--- a/libs/gst/helpers/gst-plugin-scanner.c
+++ b/libs/gst/helpers/gst-plugin-scanner.c
@@ -30,6 +30,7 @@
 #include <gst/gst.h>
 
 #include <string.h>
+#include <dlfcn.h>
 
 int
 main (int argc, char *argv[])
@@ -37,6 +38,7 @@ main (int argc, char *argv[])
   gboolean res;
   char **my_argv;
   int my_argc;
+  void *handle;
 
   /* We may or may not have an executable path */
   if (argc != 2 && argc != 3)
@@ -50,6 +52,8 @@ main (int argc, char *argv[])
   my_argv[0] = argv[0];
   my_argv[1] = (char *) "--gst-disable-registry-update";
 
+  handle = dlopen("libgomp.so.1", RTLD_LAZY);
+
 #ifndef GST_DISABLE_REGISTRY
   _gst_disable_registry_cache = TRUE;
 #endif
@@ -66,6 +70,6 @@ main (int argc, char *argv[])
   /* Create registry scanner listener and run */
   if (!_gst_plugin_loader_client_run ())
     return 1;
-
+  dlclose(handle);
   return 0;
 }
-- 
2.28.0.220.ged08abb693-goog