diff options
| author | François Dumont <frs.dumont@gmail.com> | 2024-06-01 22:17:19 +0200 |
|---|---|---|
| committer | François Dumont <frs.dumont@gmail.com> | 2024-06-03 21:52:58 +0200 |
| commit | 955202eb2cdbe2bc74c626bce90ee1eac410ad4f (patch) | |
| tree | 57ef2ee335b5b5557e8fc5cc71972a05167f641e | |
| parent | 97474ba2075dc3c397bbc2861646561dcfd13386 (diff) | |
| download | gcc-955202eb2cdbe2bc74c626bce90ee1eac410ad4f.zip gcc-955202eb2cdbe2bc74c626bce90ee1eac410ad4f.tar.gz gcc-955202eb2cdbe2bc74c626bce90ee1eac410ad4f.tar.bz2 | |
libstdc++: Fix -Wstringop-overflow warning coming from std::vector [PR109849]
libstdc++-v3/ChangeLog:
PR libstdc++/109849
* include/bits/vector.tcc
(std::vector<>::_M_range_insert(iterator, _FwdIt, _FwdIt,
forward_iterator_tag))[__cplusplus < 201103L]: Add __builtin_unreachable
expression to tell the compiler that the allocated buffer is large enough to
receive current elements plus the elements of the range to insert.
(cherry picked from commit 0426be454448f8cfb9db21f4f669426afb7b57c8)
| -rw-r--r-- | libstdc++-v3/include/bits/vector.tcc | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libstdc++-v3/include/bits/vector.tcc b/libstdc++-v3/include/bits/vector.tcc index 25df060..42352aa 100644 --- a/libstdc++-v3/include/bits/vector.tcc +++ b/libstdc++-v3/include/bits/vector.tcc @@ -1005,6 +1005,11 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER const size_type __len = _M_check_len(__n, "vector::_M_range_insert"); +#if __cplusplus < 201103LL + if (__len < (__n + (__old_start - __old_finish))) + __builtin_unreachable(); +#endif + pointer __new_start(this->_M_allocate(__len)); pointer __new_finish(__new_start); __try |