From ac9eec632718a20a3454d2d547fea60d58fc603c Mon Sep 17 00:00:00 2001
From: Michal Nowak <mnowak@isc.org>
Date: Thu, 27 Feb 2025 11:32:53 +0100
Subject: [PATCH] Fix Clang TSAN reports

Disabling new dynamic ELF tags ensures the Clang symbolizer creates
valid TSAN reports. For consistency, also add the option to gcc:tsan so
they are both on the same footing.
---
 .gitlab-ci.yml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e0c936e99f..7b83374f0b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1305,7 +1305,7 @@ gcc:tsan:
   variables:
     CC: gcc
     CFLAGS: "${CFLAGS_COMMON} -Wno-stringop-overread -ggdb -O2 -fsanitize=thread"
-    LDFLAGS: "-fsanitize=thread"
+    LDFLAGS: "-fsanitize=thread -Wl,--disable-new-dtags"
     EXTRA_CONFIGURE: "--with-libidn2 --enable-pthread-rwlock --without-jemalloc PKG_CONFIG_PATH=/opt/tsan/lib/pkgconfig"
   <<: *tsan_fedora_41_amd64_image
   <<: *build_job
@@ -1334,7 +1334,8 @@ clang:tsan:
   variables:
     CC: "${CLANG}"
     CFLAGS: "${CFLAGS_COMMON} -ggdb -O2 -fsanitize=thread"
-    LDFLAGS: "-fsanitize=thread"
+    # -Wl,--disable-new-dtags ensures that Clang creates valid TSAN reports
+    LDFLAGS: "-fsanitize=thread -Wl,--disable-new-dtags"
     EXTRA_CONFIGURE: "--with-libidn2 --enable-pthread-rwlock --without-jemalloc PKG_CONFIG_PATH=/opt/tsan/lib/pkgconfig"
 
 system:clang:tsan: