Using C++11+ in hotspot

[Andrew Haley]

On 08/05/2018 04:30 PM, Martin Buchholz wrote:
> Here's one example of code that actually did go wrong with Google's latest
> internal toolchain, because the copy was not in fact word-atomic.  Thanks
> to whoever added the comment long ago.
>
> static inline void copy_table(address* from, address* to, int size) {
>   // Copy non-overlapping tables. The copy has to occur word wise for MT
> safety.
>   while (size-- > 0) *to++ = *from++;
> }
> 
> Recommendation: target C++11 for jdk12; 
I don't think that helps.  There's no legal way AFAICS to force an atomic
access to non-atomic types in C++11.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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