Register tcmalloc atfork handler as early as possible
This is what other mallocs do (glibc malloc and jemalloc). The idea is
malloc is usually initialized very eary. So if we register atfork
handler at that time, we're likely to be first. And that makes our
atfork handler a bit safer, since there is much less chance of some
other library installing their "take all locks" handler first and
having fork take malloc lock before library's lock and deadlocking.
This should address issue #904.
3 files changed
