From 9ea3e191213f8c282218b5a3251f1a9f56db01b3 Mon Sep 17 00:00:00 2001 From: Thomas Braun Date: Tue, 27 Aug 2019 14:22:19 +0200 Subject: [PATCH] .travis/cmake: Rework clang sanitizer invocation - Switch to clang-7 - Adapt PATH so that llvm-symbolizer can be found for useful stacktraces - Adapt compile flags "-O0" ensures much faster compile times "-fno-sanitize-recover=all -fsanitize-recover=unsigned-integer-overflow" this fails the build on all issues except unsigned integer overflows. Not failing in this case is required in combination with the sanitizer suppression file as only recoverable errors can be suppressed. The UBSAN suppression file ignores errors from stl_bvector.h (which holds std::vector). Clang reports that error as SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/stl_bvector.h:158:20 in Start 34: test-deserialization_all 28/88 Test #71: test-testsuites_default .............***Failed 0.32 sec /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/stl_bvector.h:158:20: runtime error: unsigned integer overflow: 0 - 1 cannot be represented in type 'unsigned int' #0 0x628f72 in std::_Bit_iterator_base::_M_bump_down() /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/stl_bvector.h:158:20 #1 0x628d16 in std::_Bit_iterator::operator--() /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/stl_bvector.h:251:7 #2 0x634aac in std::vector >::pop_back() /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/stl_bvector.h:1010:7 #3 0x61eff0 in bool nlohmann::detail::parser, std::allocator >, bool, long, unsigned long, double, std::allocator, nlohmann::adl_serializer> >::sax_parse_internal, std::allocator >, bool, long, unsigned long, double, std::allocator, nlohmann::adl_serializer> > >(nlohmann::detail::json_sax_dom_parser, std::allocator >, bool, long, unsigned long, double, std::allocator, nlohmann::adl_serializer> >*) /home/firma/devel/json/include/nlohmann/detail/input/parser.hpp:439:28 #4 0x604864 in nlohmann::detail::parser, std::allocator >, bool, long, unsigned long, double, std::allocator, nlohmann::adl_serializer> >::parse(bool, nlohmann::basic_json, std::allocator >, bool, long, unsigned long, double, std::allocator, nlohmann::adl_serializer>&) /home/firma/devel/json/include/nlohmann/detail/input/parser.hpp:116:13 #5 0x5f8079 in nlohmann::operator>>(std::istream&, nlohmann::basic_json, std::allocator >, bool, long, unsigned long, double, std::allocator, nlohmann::adl_serializer>&) /home/firma/devel/json/include/nlohmann/json.hpp:6356:42 #6 0x5e1d92 in _DOCTEST_ANON_FUNC_21() /home/firma/devel/json/test/src/unit-testsuites.cpp:343:9 #7 0x7207fe in doctest::Context::run() /home/firma/devel/json/test/thirdparty/doctest/doctest.h:5938:21 #8 0x72681a in main /home/firma/devel/json/test/thirdparty/doctest/doctest.h:6016:71 #9 0x7f75d22362e0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202e0) #10 0x4c28b9 in _start (/home/firma/devel/json/build/test/test-testsuites+0x4c28b9) The pop_back() in parser.hpp assert(not states.empty()); -> states.pop_back(); triggers the UBSAN report. But the assertion above ensure that we only call pop_back() on an non-empty vector, therefore this is a STL library bug and thus must be ignored for us. --- .travis.yml | 9 ++++++--- test/CMakeLists.txt | 2 +- test/src/UBSAN.supp | 1 + 3 files changed, 8 insertions(+), 4 deletions(-) create mode 100644 test/src/UBSAN.supp diff --git a/.travis.yml b/.travis.yml index 7078fd09..a8f5e96f 100644 --- a/.travis.yml +++ b/.travis.yml @@ -43,12 +43,15 @@ matrix: - os: linux compiler: clang env: - - COMPILER=clang++-5.0 + - COMPILER=clang++-7 - CMAKE_OPTIONS=-DJSON_Sanitizer=ON + - UBSAN_OPTIONS=print_stacktrace=1,suppressions=$(pwd)/test/src/UBSAN.supp addons: apt: - sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-5.0'] - packages: ['g++-6', 'clang-5.0', 'ninja-build'] + sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-7'] + packages: ['g++-6', 'clang-7', 'ninja-build'] + before_script: + - export PATH=$PATH:/usr/lib/llvm-7/bin # cppcheck - os: linux diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt index c34f38f0..e13d31bb 100644 --- a/test/CMakeLists.txt +++ b/test/CMakeLists.txt @@ -6,7 +6,7 @@ option(JSON_Coverage "Build test suite with coverage information" OFF) if(JSON_Sanitizer) message(STATUS "Building test suite with Clang sanitizer") if(NOT MSVC) - set(CMAKE_CXX_FLAGS "-g -O2 -fsanitize=address -fsanitize=undefined -fsanitize=integer -fsanitize=nullability -fno-omit-frame-pointer") + set(CMAKE_CXX_FLAGS "-g -O0 -fsanitize=address -fsanitize=undefined -fsanitize=integer -fsanitize=nullability -fno-omit-frame-pointer -fno-sanitize-recover=all -fsanitize-recover=unsigned-integer-overflow") endif() endif() diff --git a/test/src/UBSAN.supp b/test/src/UBSAN.supp new file mode 100644 index 00000000..b19f0436 --- /dev/null +++ b/test/src/UBSAN.supp @@ -0,0 +1 @@ +unsigned-integer-overflow:stl_bvector.h