joyent/libuv — pull request #1300 by bnoordhuis (2014-05-29 15:36:48+00:00)
Title: unix: block SIGPROF in worker threads

Ensure that SIGPROF-based profilers like V8's never wake up on one of
our worker threads. V8 handles it graciously by simply dropping the
sample but that means the aggregated result becomes increasingly
unreliable.

/cc @indutny - should be back-ported to v0.10.