[TravisCI] Add ASan/LSan/UBSan suppression files and use them in

CI.

contrib/ci/scripts/sanitizer_env.sh

@@ -0,0 +1,19 @@
+# This script is intended to be included by other
+# scripts and should not be executed directly
+
+: ${Z3_SRC_DIR?"Z3_SRC_DIR must be specified"}
+: ${ASAN_BUILD?"ASAN_BUILD must be specified"}
+: ${UBSAN_BUILD?"UBSAN_BUILD must be specified"}
+
+if [ "X${ASAN_BUILD}" = "X1" ]; then
+  # Use suppression files
+  export LSAN_OPTIONS="print_suppressions=1,suppressions=${Z3_SRC_DIR}/contrib/suppressions/sanitizers/lsan.txt"
+  export ASAN_OPTIONS="print_suppressions=1,suppressions=${Z3_SRC_DIR}/contrib/suppressions/sanitizers/asan.txt"
+fi
+
+if [ "X${UBSAN_BUILD}" = "X1" ]; then
+  # `halt_on_error=1,abort_on_error=1` means that on the first UBSan error
+  # the program will terminate by calling `abort(). Without this UBSan will
+  # allow execution to continue. We also use a suppression file.
+  export UBSAN_OPTIONS="halt_on_error=1,abort_on_error=1,print_suppressions=1,suppressions=${Z3_SRC_DIR}/contrib/suppressions/sanitizers/ubsan.txt"
+fi

contrib/ci/scripts/test_z3_examples_cmake.sh

@@ -21,6 +21,9 @@ source ${SCRIPT_DIR}/set_compiler_flags.sh
 # Set CMake generator args
 source ${SCRIPT_DIR}/set_generator_args.sh
 
+# Sanitizer environment variables
+source ${SCRIPT_DIR}/sanitizer_env.sh
+
 cd "${Z3_BUILD_DIR}"
 
 # Build and run C example

contrib/ci/scripts/test_z3_system_tests.sh

@@ -16,6 +16,9 @@ if [ "X${RUN_SYSTEM_TESTS}" != "X1" ]; then
   exit 0
 fi
 
+# Sanitizer environment variables
+source ${SCRIPT_DIR}/sanitizer_env.sh
+
 Z3_EXE="${Z3_BUILD_DIR}/z3"
 Z3_LIB_DIR="${Z3_BUILD_DIR}"
 

contrib/ci/scripts/test_z3_unit_tests_cmake.sh

@@ -13,6 +13,9 @@ set -o pipefail
 # Set CMake generator args
 source ${SCRIPT_DIR}/set_generator_args.sh
 
+# Sanitizer environment variables
+source ${SCRIPT_DIR}/sanitizer_env.sh
+
 cd "${Z3_BUILD_DIR}"
 
 function build_unit_tests() {