Fix msan issues detected during upgrade to Clang 16 #151
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When temporary buffer is used in getData128(), then it may return uninitialized data. Signed-off-by: Azat Khuzhin <[email protected]>
There are some issues with dtors in boost::container::small_vector
and/or vector, which is reported by MSan as an error.
The suppression __attribute__((no_sanitize_memory)) works until
clang-15, but since clang-16 it does not. It looks like before clang-16
this no_sanitize_memory works for all child functions, while since
clang-16 only for this function. I've tried to add few others, but a) it
looks icky b) I haven't managed to finish this process.
Also I've measured the performance and it hadn't been changed. Though
boost::small_vector should be faster then std::vector, but apparently my
particular case hadn't affected too much.
And one more thing, MSan reports this only with -O0, with -O3 - it is
not reproduced.
<details>
<summary>MSan report:</summary>
_Note: it was slightly trimmed_
```
==11364==WARNING: MemorySanitizer: use-of-uninitialized-value
2023.05.10 15:40:53.000233 [ 11620 ] {} <Trace> AsynchronousMetrics: MemoryTracking: was 1012.32 MiB, peak 1012.32 MiB, free memory in arenas 0.00 B, will set to 1015.82 MiB (RSS), difference: 3.50 MiB
0 0x55558d13289f in boost::container::vector_alloc_holder<boost::container::small_vector_allocator<std::__1::pair<unsigned char, unsigned char>, std::__1::allocator<void>, void>, unsigned long, boost::move_detail::integral_constant<unsigned int, 1u>>::deallocate(std::__1::pair<unsigned char, unsigned char>* const&, unsigned long) .cmake-llvm16-msan/./contrib/boost/boost/container/vector.hpp:455:7
1 0x55558d139e8e in boost::container::vector_alloc_holder<boost::container::small_vector_allocator<std::__1::pair<unsigned char, unsigned char>, std::__1::allocator<void>, void>, unsigned long, boost::move_detail::integral_constant<unsigned int, 1u>>::~vector_alloc_holder() .cmake-llvm16-msan/./contrib/boost/boost/container/vector.hpp:420:16
2 0x55558d139e0b in boost::container::vector<std::__1::pair<unsigned char, unsigned char>, boost::container::small_vector_allocator<std::__1::pair<unsigned char, unsigned char>, std::__1::allocator<void>, void>, void>::~vector() .cmake-llvm16-msan/./contrib/boost/boost/container/vector.hpp:1141:4
3 0x55558d12a4fa in boost::container::small_vector_base<std::__1::pair<unsigned char, unsigned char>, std::__1::allocator<std::__1::pair<unsigned char, unsigned char>>, void>::~small_vector_base() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:445:80
4 0x55558d12a4fa in boost::container::small_vector<std::__1::pair<unsigned char, unsigned char>, 1ul, std::__1::allocator<std::__1::pair<unsigned char, unsigned char>>, void>::~small_vector() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:564:7
5 0x55558d13a21b in std::__1::__tuple_leaf<0ul, boost::container::small_vector<std::__1::pair<unsigned char, unsigned char>, 1ul, std::__1::allocator<std::__1::pair<unsigned char, unsigned char>>, void>, false>::~__tuple_leaf() .cmake-llvm16-msan/./contrib/llvm-project/libcxx/include/tuple:265:7
6 0x55558d13a13a in std::__1::__tuple_impl<>::~__tuple_impl() .cmake-llvm16-msan/./contrib/llvm-project/libcxx/include/tuple:451:37
7 0x55558d13a05b in std::__1::tuple<>::~tuple() .cmake-llvm16-msan/./contrib/llvm-project/libcxx/include/tuple:538:28
8 0x55558d139f7b in ue2::flat_detail::flat_base<>::~flat_base() .cmake-llvm16-msan/./contrib/vectorscan/src/util/flat_containers.h:89:7
9 0x55558d1299da in ue2::flat_set<>::~flat_set() .cmake-llvm16-msan/./contrib/vectorscan/src/util/flat_containers.h:152:7
10 0x55558d4e4dda in ue2::(anonymous namespace)::DAccelScheme::~DAccelScheme() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:301:8
11 0x55558d4ff6cf in void boost::container::allocator_traits<>::priv_destroy<ue2::(anonymous namespace)::DAccelScheme>(boost::move_detail::integral_constant<bool, false>, boost::container::small_vector_allocator<ue2::(anonymous namespace)::DAccelScheme, boost::container::new_allocator<void>, void>&, ue2::(anonymous namespace)::DAccelScheme*) .cmake-llvm16-msan/./contrib/boost/boost/container/allocator_traits.hpp:403:11
12 0x55558d4fefde in void boost::container::allocator_traits<>::destroy<ue2::(anonymous namespace)::DAccelScheme>(boost::container::small_vector_allocator<ue2::(anonymous namespace)::DAccelScheme, boost::container::new_allocator<void>, void>&, ue2::(anonymous namespace)::DAccelScheme*) .cmake-llvm16-msan/./contrib/boost/boost/container/allocator_traits.hpp:331:7
13 0x55558d4fc364 in boost::container::dtl::disable_if_trivially_destructible<>::type boost::container::destroy_alloc_n<>(boost::container::small_vector_allocator<ue2::(anonymous namespace)::DAccelScheme, boost::container::new_allocator<void>, void>&, ue2::(anonymous namespace)::DAccelScheme*, unsigned long) .cmake-llvm16-msan/./contrib/boost/boost/container/detail/copy_move_algo.hpp:988:7
14 0x55558d517962 in boost::container::vector<>::~vector() .cmake-llvm16-msan/./contrib/boost/boost/container/vector.hpp:1138:7
15 0x55558d4f724d in boost::container::small_vector_base<>::~small_vector_base() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:445:80
16 0x55558d4f724d in boost::container::small_vector<>::~small_vector() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:564:7
17 0x55558d4f2ff3 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:444:1
18 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
19 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
20 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
21 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
22 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
23 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
24 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
25 0x55558d4e4af5 in ue2::findBestDoubleAccelScheme() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:556:5
26 0x55558d4e2659 in ue2::findBestAccelScheme() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:569:27
27 0x55558d3aa8ff in ue2::look_for_offset_accel(ue2::raw_dfa const&, unsigned short, unsigned int) .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/accel_dfa_build_strat.cpp:197:22
28 0x55558d3a9727 in ue2::accel_dfa_build_strat::find_escape_strings(unsigned short) const .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/accel_dfa_build_strat.cpp:414:13
29 0x55558d3b2119 in ue2::accel_dfa_build_strat::getAccelInfo(ue2::Grey const&)::$_0::operator()(unsigned long) const .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/accel_dfa_build_strat.cpp:606:26
30 0x55558d3aefd4 in ue2::accel_dfa_build_strat::getAccelInfo(ue2::Grey const&) .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/accel_dfa_build_strat.cpp:627:13
31 0x55558d2fc61f in ue2::mcclellanCompile8() .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/mcclellancompile.cpp:935:22
32 0x55558d2e89ec in ue2::mcclellanCompile_i() .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/mcclellancompile.cpp:1510:15
33 0x55558d2ff502 in ue2::mcclellanCompile() .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/mcclellancompile.cpp:1527:12
34 0x55558fb13b52 in ue2::getDfa() .cmake-llvm16-msan/./contrib/vectorscan/src/rose/rose_build_bytecode.cpp:646:15
35 0x55558fb7e8c8 in ue2::makeLeftNfa() .cmake-llvm16-msan/./contrib/vectorscan/src/rose/rose_build_bytecode.cpp:854:22
36 0x55558fb6bd36 in ue2::buildLeftfix() .cmake-llvm16-msan/./contrib/vectorscan/src/rose/rose_build_bytecode.cpp:1123:15
37 0x55558fb21020 in ue2::buildLeftfixes() .cmake-llvm16-msan/./contrib/vectorscan/src/rose/rose_build_bytecode.cpp:1579:9
38 0x55558fad972c in ue2::buildNfas() .cmake-llvm16-msan/./contrib/vectorscan/src/rose/rose_build_bytecode.cpp:2063:10
39 0x55558fac9843 in ue2::RoseBuildImpl::buildFinalEngine(unsigned int) .cmake-llvm16-msan/./contrib/vectorscan/src/rose/rose_build_bytecode.cpp:3660:10
40 0x55558f2b2d86 in ue2::RoseBuildImpl::buildRose(unsigned int) .cmake-llvm16-msan/./contrib/vectorscan/src/rose/rose_build_compile.cpp:1796:12
Uninitialized value was stored to memory at
0 0x55558d132898 in boost::container::vector_alloc_holder<boost::container::small_vector_allocator<std::__1::pair<unsigned char, unsigned char>, std::__1::allocator<void>, void>, unsigned long, boost::move_detail::integral_constant<unsigned int, 1u>>::deallocate(std::__1::pair<unsigned char, unsigned char>* const&, unsigned long) .cmake-llvm16-msan/./contrib/boost/boost/container/vector.hpp:455:56
1 0x55558d139e8e in boost::container::vector_alloc_holder<>::~vector_alloc_holder() .cmake-llvm16-msan/./contrib/boost/boost/container/vector.hpp:420:16
2 0x55558d139e0b in boost::container::vector<>::~vector() .cmake-llvm16-msan/./contrib/boost/boost/container/vector.hpp:1141:4
3 0x55558d12a4fa in boost::container::small_vector_base<>::~small_vector_base() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:445:80
4 0x55558d12a4fa in boost::container::small_vector<std::__1::pair<unsigned char, unsigned char>, 1ul, std::__1::allocator<std::__1::pair<unsigned char, unsigned char>>, void>::~small_vector() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:564:7
5 0x55558d13a21b in std::__1::__tuple_leaf<>::~__tuple_leaf() .cmake-llvm16-msan/./contrib/llvm-project/libcxx/include/tuple:265:7
6 0x55558d13a13a in std::__1::__tuple_impl<>::~__tuple_impl .cmake-llvm16-msan/./contrib/llvm-project/libcxx/include/tuple:451:37
7 0x55558d13a05b in std::__1::tuple<>::~tuple() .cmake-llvm16-msan/./contrib/llvm-project/libcxx/include/tuple:538:28
8 0x55558d139f7b in ue2::flat_detail::flat_base<>::~flat_base() .cmake-llvm16-msan/./contrib/vectorscan/src/util/flat_containers.h:89:7
9 0x55558d1299da in ue2::flat_set<>::~flat_set() .cmake-llvm16-msan/./contrib/vectorscan/src/util/flat_containers.h:1
52:7
10 0x55558d4e4dda in ue2::(anonymous namespace)::DAccelScheme::~DAccelScheme() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:301:8
11 0x55558d4ff6cf in void boost::container::allocator_traits<>::priv_destroy<ue2::(anonymous namespace)::DAccelScheme>() .cmake-llvm16-msan/./contrib/boost/boost/container/allocator_traits.hpp:403:11
12 0x55558d4fefde in void boost::container::allocator_traits<>::destroy<ue2::(anonymous namespace)::DAccelScheme>(boost::container::small_vector_allocator<>&, ue2::(anonymous namespace)::DAccelScheme*) .cmake-llvm16-msan/./contrib/boost/boost/container/allocator_traits.hpp:331:7
13 0x55558d4fc364 in boost::container::dtl::disable_if_trivially_destructible<>::type boost::container::destroy_alloc_n<boost::container::small_vector_allocator<ue2::(anonymous namespace)::DAccelScheme, boost::container::new_allocator<void>, void>, ue2::(anonymous namespace)::DAccelScheme*, unsigned long>(boost::container::small_vector_allocator<ue2::(anonymous namespace)::DAccelScheme, boost::container::new_allocator<void>, void>&, ue2::(anonymous namespace)::DAccelScheme*, unsigned long) .cmake-llvm16-msan/./contrib/boost/boost/container/detail/copy_move_algo.hpp:988:7
14 0x55558d517962 in boost::container::vector<ue2::(anonymous namespace)::DAccelScheme, boost::container::small_vector_allocator<ue2::(anonymous namespace)::DAccelScheme, boost::container::new_allocator<void>, void>, void>::~vector() .cmake-llvm16-msan/./contrib/boost/boost/container/vector.hpp:1138:7
15 0x55558d4f724d in boost::container::small_vector_base<>::~small_vector_base() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:445:80
16 0x55558d4f724d in boost::container::small_vector<>::~small_vector() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:564:7
17 0x55558d4f2ff3 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:444:1
18 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
19 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
20 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
21 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
Member fields were destroyed
0 0x5555652e08dd in __sanitizer_dtor_callback_fields /src/llvm/worktrees/llvm-16/compiler-rt/lib/msan/msan_interceptors.cpp:961:5
1 0x55558d4f71a6 in boost::container::small_vector<>::~small_vector() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:528:8
2 0x55558d4f71a6 in boost::container::small_vector<>::~small_vector() .cmake-llvm16-msan/./contrib/boost/boost/container/small_vector.hpp:564:7
3 0x55558d4f2ff3 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:444:1
4 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
5 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
6 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
7 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
8 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
9 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
10 0x55558d4f2f41 in ue2::findDoubleBest() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:442:9
11 0x55558d4e4af5 in ue2::findBestDoubleAccelScheme() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:556:5
12 0x55558d4e2659 in ue2::findBestAccelScheme() .cmake-llvm16-msan/./contrib/vectorscan/src/nfagraph/ng_limex_accel.cpp:569:27
13 0x55558d3aa8ff in ue2::look_for_offset_accel(ue2::raw_dfa const&, unsigned short, unsigned int) .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/accel_dfa_build_strat.cpp:197:22
14 0x55558d3a9727 in ue2::accel_dfa_build_strat::find_escape_strings(unsigned short) const .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/accel_dfa_build_strat.cpp:414:13
15 0x55558d3b2119 in ue2::accel_dfa_build_strat::getAccelInfo(ue2::Grey const&)::$_0::operator()(unsigned long) const .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/accel_dfa_build_strat.cpp:606:26
16 0x55558d3aefd4 in ue2::accel_dfa_build_strat::getAccelInfo(ue2::Grey const&) .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/accel_dfa_build_strat.cpp:627:13
17 0x55558d2fc61f in ue2::mcclellanCompile8(ue2::(anonymous namespace)::dfa_info&, ue2::CompileContext const&, std::__1::set<unsigned short, std::__1::less<unsigned short>, std::__1::allocator<unsigned short>>*) .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/mcclellancompile.cpp:935:22
18 0x55558d2e89ec in ue2::mcclellanCompile_i(ue2::raw_dfa&, ue2::accel_dfa_build_strat&, ue2::CompileContext const&, bool, std::__1::set<unsigned short, std::__1::less<unsigned short>, std::__1::allocator<unsigned short>>*) .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/mcclellancompile.cpp:1510:15
19 0x55558d2ff502 in ue2::mcclellanCompile(ue2::raw_dfa&, ue2::CompileContext const&, ue2::ReportManager const&, bool, bool, std::__1::set<unsigned short, std::__1::less<unsigned short>, std::__1::allocator<unsigned short>>*) .cmake-llvm16-msan/./contrib/vectorscan/src/nfa/mcclellancompile.cpp:1527:12
20 0x55558fb13b52 in ue2::getDfa(ue2::raw_dfa&, bool, ue2::CompileContext const&, ue2::ReportManager const&) .cmake-llvm16-msan/./contrib/vectorscan/src/rose/rose_build_bytecode.cpp:646:15
```
</details>
Signed-off-by: Azat Khuzhin <[email protected]>
|
Hi, thanks for the PR, could you please submit against develop branch? Also, keep only one PR? :) |
|
Sure and thanks ... sorry this is a mess ... I'll fix that up. Please ignore this PR. |
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This PR is an amalgamation of
Pushing them as a single PR because we (ClickHouse) can then continue to reference the upstream vectorscan repository.