[Bug sanitizer/81111] New: Cannot build libstdc++ with -fsanitize=undefined

["redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81111

            Bug ID: 81111
           Summary: Cannot build libstdc++ with -fsanitize=undefined
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---

Created attachment 41568
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41568&action=edit
preprocessed source that causes ICE

I tried building libstdc++ using CXXFLAGS="-fsanitize=undefined" and it failed
building x86_64-pc-linux-gnu/32/libstdc++-v3/src/c++11/cxx11-locale-inst.o and
other files for the 32-bit lib.

The same files build OK for 64-bit using -fsanitize=undefined

The attached (unreduced) preprocessed source fails using a recent trunk:


$ /home/jwakely/src/gcc/build/gcc/cc1plus -fsanitize=undefined -m32
cxx11-locale-inst.ii  -quiet
In file included from
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/bits/stl_algobase.h:63:0,
                 from
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/bits/char_traits.h:39,
                 from
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/string:40,
                 from
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/bits/locale_classes.h:40,
                 from
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/locale:39,
                 from
/home/jwakely/src/gcc/gcc/libstdc++-v3/src/c++11/locale-inst.cc:38,
                 from
/home/jwakely/src/gcc/gcc/libstdc++-v3/src/c++11/cxx11-locale-inst.cc:39:
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/ext/numeric_traits.h:
In instantiation of ‘const long long unsigned int
__gnu_cxx::__numeric_traits_integer<long long unsigned int>::__min’:
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/bits/locale_facets.tcc:474:7:
  required from ‘_InIter std::num_get<_CharT, _InIter>::_M_extract_int(_InIter,
_InIter, std::ios_base&, std::ios_base::iostate&, _ValueT&) const [with _ValueT
= long long unsigned int; _CharT = char; _InIter =
std::istreambuf_iterator<char, std::char_traits<char> >; std::ios_base::iostate
= std::_Ios_Iostate]’
/home/jwakely/src/gcc/gcc/libstdc++-v3/src/c++11/locale-inst.cc:143:27:  
required from here
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/ext/numeric_traits.h:58:67:
internal compiler error: Segmentation fault
       static const _Value __min = __glibcxx_min(_Value);
                                                                   ^            
0xde006f crash_signal
        /home/jwakely/src/gcc/gcc/gcc/toplev.c:338
0xb2ba10 tree_check(tree_node*, char const*, int, char const*, tree_code)
        /home/jwakely/src/gcc/gcc/gcc/tree.h:3082
0xb2ba10 gimple_body(tree_node*)
        /home/jwakely/src/gcc/gcc/gcc/gimple-expr.c:317
0xb538a4 gimple_add_tmp_var(tree_node*)
        /home/jwakely/src/gcc/gcc/gcc/gimplify.c:753
0xb2c1ea create_tmp_var(tree_node*, char const*)
        /home/jwakely/src/gcc/gcc/gcc/gimple-expr.c:477
0xe02151 ubsan_encode_value(tree_node*, bool)
        /home/jwakely/src/gcc/gcc/gcc/ubsan.c:146
0x936fd4 ubsan_instrument_shift(unsigned int, tree_code, tree_node*,
tree_node*)
        /home/jwakely/src/gcc/gcc/gcc/c-family/c-ubsan.c:215
0x8a960d cp_build_binary_op(unsigned int, tree_code, tree_node*, tree_node*,
int)
        /home/jwakely/src/gcc/gcc/gcc/cp/typeck.c:5282
0x671fca build_new_op_1
        /home/jwakely/src/gcc/gcc/gcc/cp/call.c:6019
0x6730de build_new_op(unsigned int, tree_code, int, tree_node*, tree_node*,
tree_node*, tree_node**, int)
        /home/jwakely/src/gcc/gcc/gcc/cp/call.c:6064
0x89a252 build_x_binary_op(unsigned int, tree_code, tree_node*, tree_code,
tree_node*, tree_code, tree_node**, int)
        /home/jwakely/src/gcc/gcc/gcc/cp/typeck.c:3959
0x810657 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:16921
0x812f16 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:17469
0x806f4e tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:16534
0x801db0 regenerate_decl_from_template
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:22419
0x801db0 instantiate_decl(tree_node*, bool, bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:22854
0x72831f maybe_instantiate_decl
        /home/jwakely/src/gcc/gcc/gcc/cp/decl2.c:4995
0x72af55 mark_used(tree_node*, int)
        /home/jwakely/src/gcc/gcc/gcc/cp/decl2.c:5094
0x80fd97 tsubst_qualified_id
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:14405
0x8114d9 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:16946
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.