MemorySanitizer Warning: Use of Uninitialized Value in MPC protocols execution

[HopeDevote]

Describe the bug
There is a memory issue during the execution of the soho-party.x program, as detected by the MemorySanitizer. The error suggests the use of uninitialized memory in the STL map while running the soho-party.x program. This occurs during the handling of options and initialization in the ezOptionParser and OnlineOptions classes.

To Reproduce
Compilation and or execution command lines

../MP-SPDZ/soho-party.x 0 test-pn 10666 -h localhost
../MP-SPDZ/soho-party.x 1 test-pn 10666 -h localhost

Observe the error output related to the MemorySanitizer warning.

Error message

==1297801==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x4d5ed0 in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int>, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> > >::_M_lower_bound(std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> >*, std::_Rb_tree_node_base*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_tree.h:1933:7
    #1 0x4d5ed0 in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int>, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> > >::lower_bound(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_tree.h:1287:16
    #2 0x4d5ed0 in std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> > >::lower_bound(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_map.h:1258:21
    #3 0x4d5ed0 in std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> > >::operator[](std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_map.h:515:17
    #4 0x4d4928 in ez::ezOptionParser::add(char const*, bool, int, char, char const*, char const*, char const*, ez::ezOptionValidator*) /app/MP-SPDZ-main/./Tools/ezOptionParser.h:1464:3
    #5 0x7fdf374bb880 in OnlineOptions::OnlineOptions(ez::ezOptionParser&, int, char const**, bool) /app/MP-SPDZ-main/Processor/OnlineOptions.cpp:58:9
    #6 0x7fdf374c03c5 in OnlineOptions::OnlineOptions(ez::ezOptionParser&, int, char const**, int, bool, bool, bool) /app/MP-SPDZ-main/Processor/OnlineOptions.cpp:191:9
    #7 0x4cf2bf in OnlineOptions::OnlineOptions<SohoShare<gfp_<0, 2> >, gf2n_short>(ez::ezOptionParser&, int, char const**, SohoShare<gfp_<0, 2> >, bool, gf2n_short) /app/MP-SPDZ-main/./Processor/OnlineOptions.hpp:14:9
    #8 0x4c0630 in DishonestMajorityFieldMachine<SohoShare, SohoShare, gf2n_short, DishonestMajorityMachine>::DishonestMajorityFieldMachine(int, char const**, ez::ezOptionParser&, bool) /app/MP-SPDZ-main/./Processor/FieldMachine.h:43:23
    #9 0x4c0630 in main /app/MP-SPDZ-main/Machines/soho-party.cpp:37:5
    #10 0x7fdf3661a082 in __libc_start_main /build/glibc-B3wQXB/glibc-2.31/csu/../csu/libc-start.c:308:16
    #11 0x44349d in _start (/app/MP-SPDZ-main/soho-party.x+0x44349d)

SUMMARY: MemorySanitizer: use-of-uninitialized-value /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_tree.h:1933:7 in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int>, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> > >::_M_lower_bound(std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> >*, std::_Rb_tree_node_base*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)

[mkskeller]

This seems to be an effect of the standard library not having been compiled with the memory sanitizer functionality: https://stackoverflow.com/a/71550379

[HopeDevote]

您好，您的文件我已收到！