If you're using a Clang, you need at least Valgrind 3.20+ for proper DWARF5 support.
Installing Valgrind from source is straightforward if needed: https://valgrind.org/downloads/repository.html.
Valgrind can then be run per the developer notes:
valgrind --suppressions=contrib/valgrind.supp build/bin/test_bitcoin
valgrind --suppressions=contrib/valgrind.supp \
--leak-check=full \
--show-leak-kinds=all \
build/bin/test_bitcoin --log_level=test_suite
./build/test/functional/test_runner.py --valgrind
valgrind -v --leak-check=full --show-leak-kinds=all build/bin/bitcoind -printtoconsole -prune=880