ci: add substitute linux64 ubsan runner

.gitlab-ci.yml

@@ -255,6 +255,15 @@ linux64_tsan-build:
   variables:
     BUILD_TARGET: linux64_tsan
 
+linux64_ubsan-build:
+  extends:
+    - .build-template
+    - .skip-in-fast-mode-template
+  needs:
+    - x86_64-pc-linux-gnu-debug
+  variables:
+    BUILD_TARGET: linux64_ubsan
+
 linux64_nowallet-build:
   extends:
     - .build-template
@@ -299,3 +308,12 @@ linux64_tsan-test:
     - linux64_tsan-build
   variables:
     BUILD_TARGET: linux64_tsan
+
+linux64_ubsan-test:
+  extends:
+    - .test-template
+    - .skip-in-fast-mode-template
+  needs:
+    - linux64_ubsan-build
+  variables:
+    BUILD_TARGET: linux64_ubsan

ci/dash/matrix.sh

@@ -22,6 +22,8 @@ elif [ "$BUILD_TARGET" = "linux64" ]; then
   source ./ci/test/00_setup_env_native_qt5.sh
 elif [ "$BUILD_TARGET" = "linux64_tsan" ]; then
   source ./ci/test/00_setup_env_native_tsan.sh
+elif [ "$BUILD_TARGET" = "linux64_ubsan" ]; then
+  source ./ci/test/00_setup_env_native_ubsan.sh
 elif [ "$BUILD_TARGET" = "linux64_fuzz" ]; then
   source ./ci/test/00_setup_env_native_fuzz.sh
 elif [ "$BUILD_TARGET" = "linux64_cxx20" ]; then

ci/test/00_setup_env_native_ubsan.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2019 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+export LC_ALL=C.UTF-8
+
+export CONTAINER_NAME=ci_native_ubsan
+export PACKAGES="clang-8 llvm-8 python3-zmq qtbase5-dev qttools5-dev-tools libevent-dev bsdmainutils libboost-filesystem-dev libboost-test-dev libboost-thread-dev libdb5.3++-dev libminiupnpc-dev libzmq3-dev libqrencode-dev"
+export DEP_OPTS="NO_UPNP=1 DEBUG=1"
+export GOAL="install"
+export BITCOIN_CONFIG="--enable-zmq --enable-reduce-exports --enable-crash-hooks --with-sanitizers=undefined"
+export PYZMQ=true
+export RUN_SYMBOL_TESTS=false