@@ -152,7 +152,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
inline static void
_S_do_it(const _Tp* __b, const _Tp* __e, _Tp* __restrict__ __o)
- { __builtin_memcpy(__o, __b, (__e - __b) * sizeof(_Tp)); }
+ {
+ if (__b)
+ __builtin_memcpy(__o, __b, (__e - __b) * sizeof(_Tp));
+ }
};
template<typename _Tp>
@@ -258,7 +261,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
inline static void
_S_do_it(const _Tp* __restrict__ __a, size_t __n, _Tp* __restrict__ __b)
- { __builtin_memcpy(__b, __a, __n * sizeof (_Tp)); }
+ {
+ if (__n != 0)
+ __builtin_memcpy(__b, __a, __n * sizeof (_Tp));
+ }
};
// Copy a plain array __a[<__n>] into a play array __b[<>]
PR libstdc++/67554 * include/bits/valarray_array.h (_Array_copy_ctor<_Tp, true>) (_Array_copier<_Tp, true>): Do not pass null pointers to memcpy. Tested powerpc64le-linux, committed to trunk. Backports to follow. There's no new test for this, as we're not able to use sanitizers in the testsuite (something I still hope to fix one day). commit cd61c4ce0bfd69065018417dfe6f3e03b2010af3 Author: Jonathan Wakely <jwakely@redhat.com> Date: Mon May 14 15:50:16 2018 +0100 PR libstdc++/67554 Do not pass null pointers to memcpy PR libstdc++/67554 * include/bits/valarray_array.h (_Array_copy_ctor<_Tp, true>) (_Array_copier<_Tp, true>): Do not pass null pointers to memcpy.