Merge bitcoin#14252: build: Run functional tests and benchmarks under…

… the undefined behaviour sanitizer (UBSan)

9f49db7 Enable functional tests in UBSAN job. Enable -fsanitize=integer (part of UBSAN). Merge UBSAN Travis job with no depends. (practicalswift)

Pull request description:

  Run functional tests and benchmarks under the undefined behaviour sanitizer (UBSan).

  This will make Travis automatically detect issues such as:
  * bitcoin#14242: Avoid triggering undefined behaviour (`std::memset(nullptr, 0, 0)`) if an invalid string is passed to `DecodeSecret(...)`
  * bitcoin#14239: Avoid dividing by zero (undefined behaviour) in `EstimateMedianVal` (policy)/`ConnectTip` (validation)/`CreateTransaction` (wallet)
  * bitcoin#13546: wallet: Avoid potential use of uninitialized value `bnb_used` in `CWallet::CreateTransaction(...)`

  Addresses issue bitcoin#14059.

Tree-SHA512: 285e1542b36c582516c47938ce8d999fd89ba6c867bc0976e7306e7c949b8b84ffbfa43dbc679dd97ae639b086092e7d799d8e1c903c66a37d529ce61d5c64b4

.travis.yml

@@ -103,23 +103,14 @@ jobs:
         NO_DEPENDS=1
         GOAL="install"
         BITCOIN_CONFIG="--enable-zmq --with-incompatible-bdb --enable-glibc-back-compat --enable-reduce-exports --with-gui=qt5 CPPFLAGS=-DDEBUG_LOCKORDER"
-# x86_64 Linux (no depends, only system libs)
-    - stage: test
-      env: >-
-        HOST=x86_64-unknown-linux-gnu
-        PACKAGES="python3-zmq qtbase5-dev qttools5-dev-tools libssl1.0-dev libevent-dev bsdmainutils libboost-system-dev libboost-filesystem-dev libboost-chrono-dev libboost-test-dev libboost-thread-dev libdb5.3++-dev libminiupnpc-dev libzmq3-dev libprotobuf-dev protobuf-compiler libqrencode-dev"
-        NO_DEPENDS=1
-        GOAL="install"
-        BITCOIN_CONFIG="--enable-zmq --with-incompatible-bdb --enable-glibc-back-compat --enable-reduce-exports --with-gui=qt5 CPPFLAGS=-DDEBUG_LOCKORDER"
-# x86_64 Linux (sanitizers)
+# x86_64 Linux (no depends, only system libs, sanitizers: undefined (UBSAN) + integer)
     - stage: test
       env: >-
         HOST=x86_64-unknown-linux-gnu
         PACKAGES="clang python3-zmq qtbase5-dev qttools5-dev-tools libssl1.0-dev libevent-dev bsdmainutils libboost-system-dev libboost-filesystem-dev libboost-chrono-dev libboost-test-dev libboost-thread-dev libdb5.3++-dev libminiupnpc-dev libzmq3-dev libprotobuf-dev protobuf-compiler libqrencode-dev"
         NO_DEPENDS=1
-        RUN_FUNCTIONAL_TESTS=false # Disabled for now, can be combined with the other x86_64 linux NO_DEPENDS job when functional tests pass the sanitizers
         GOAL="install"
-        BITCOIN_CONFIG="--enable-zmq --with-incompatible-bdb --enable-glibc-back-compat --enable-reduce-exports --with-gui=qt5 CPPFLAGS=-DDEBUG_LOCKORDER --with-sanitizers=undefined CC=clang CXX=clang++"
+        BITCOIN_CONFIG="--enable-zmq --with-incompatible-bdb --enable-glibc-back-compat --enable-reduce-exports --with-gui=qt5 CPPFLAGS=-DDEBUG_LOCKORDER --with-sanitizers=integer,undefined CC=clang CXX=clang++"
 # x86_64 Linux, No wallet
     - stage: test
       env: >-

.travis/test_04_install.sh

@@ -7,7 +7,8 @@
 export LC_ALL=C.UTF-8
 
 travis_retry docker pull "$DOCKER_NAME_TAG"
-env | grep -E '^(CCACHE_|WINEDEBUG|LC_ALL|BOOST_TEST_RANDOM|CONFIG_SHELL)' | tee /tmp/env
+export UBSAN_OPTIONS="suppressions=${TRAVIS_BUILD_DIR}/contrib/sanitizers-ubsan.suppressions"
+env | grep -E '^(CCACHE_|WINEDEBUG|LC_ALL|BOOST_TEST_RANDOM|CONFIG_SHELL|UBSAN_OPTIONS)' | tee /tmp/env
 if [[ $HOST = *-mingw32 ]]; then
   DOCKER_ADMIN="--cap-add SYS_ADMIN"
 fi

contrib/sanitizers-ubsan.suppressions

@@ -0,0 +1,27 @@
+alignment:move.h
+alignment:prevector.h
+bool:wallet/wallet.cpp
+float-divide-by-zero:policy/fees.cpp
+float-divide-by-zero:validation.cpp
+float-divide-by-zero:wallet/wallet.cpp
+nonnull-attribute:support/cleanse.cpp
+unsigned-integer-overflow:basic_string.h
+unsigned-integer-overflow:bench/bench.h
+unsigned-integer-overflow:bloom.cpp
+unsigned-integer-overflow:chain.h
+unsigned-integer-overflow:crypto/chacha20.cpp
+unsigned-integer-overflow:crypto/ctaes/ctaes.c
+unsigned-integer-overflow:crypto/ripemd160.cpp
+unsigned-integer-overflow:crypto/sha1.cpp
+unsigned-integer-overflow:crypto/sha256.cpp
+unsigned-integer-overflow:crypto/sha512.cpp
+unsigned-integer-overflow:hash.cpp
+unsigned-integer-overflow:leveldb/db/log_reader.cc
+unsigned-integer-overflow:leveldb/util/bloom.cc
+unsigned-integer-overflow:leveldb/util/crc32c.h
+unsigned-integer-overflow:leveldb/util/hash.cc
+unsigned-integer-overflow:policy/fees.cpp
+unsigned-integer-overflow:script/interpreter.cpp
+unsigned-integer-overflow:stl_bvector.h
+unsigned-integer-overflow:txmempool.cpp
+unsigned-integer-overflow:validation.cpp