Reapply "[osx] implement native c++ allocation operators on osx"
This reverts commit a0880d78f3bb996790075b986c0fa3c81624aacf.
We had to revert it, because some most recent OSX versions had broken
exceptions for unwinding through functions with ATTRIBUTE_SECTION. But
now that ATTRIBUTE_SECTION is dropped on OSX, we can recover it.
Same as before, operator new/delete integration is much faster on
OSX. Unlike malloc/free and similar APIs which are ~fundamentally
broken performance-wise on OSX due to expensive arenas integration, we
don't need to support this overhead for C++ primitives. So lets get
this win at last.
1 file changed
