toolchain/gcc/patches/llvm/307-locale_facets.patch

   1 This patch fixes a bug into ostream::operator<<(double) due to the wrong size
   2 passed into the __convert_from_v method. The wrong size is then passed to
   3 std::snprintf function, that, on uClibc, doens't handle sized 0 buffer.
   4
   5 Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
   6
   7 --- a/libstdc++-v3/include/bits/locale_facets.tcc
   8 +++ b/libstdc++-v3/include/bits/locale_facets.tcc
   9 @@ -1149,7 +1149,7 @@ _GLIBCXX_BEGIN_LDBL_NAMESPACE
  10         const int __cs_size = __fixed ? __max_exp + __prec + 4
  11                                       : __max_digits * 2 + __prec;
  12         char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
  13 -       __len = std::__convert_from_v(_S_get_c_locale(), __cs, 0, __fbuf,
  14 +       __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size, __fbuf,
  15                                       __prec, __v);
  16  #endif
  17
  18 @@ -1789,7 +1789,7 @@ _GLIBCXX_BEGIN_LDBL_NAMESPACE
  19        // max_exponent10 + 1 for the integer part, + 2 for sign and '\0'.
  20        const int __cs_size = numeric_limits<long double>::max_exponent10 + 3;
  21        char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
  22 -      int __len = std::__convert_from_v(_S_get_c_locale(), __cs, 0, "%.*Lf",
  23 +      int __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size, "%.*Lf",
  24                                         0, __units);
  25  #endif
  26        string_type __digits(__len, char_type());