The original conversation about this problem is here: http://mail.openjdk.java.net/pipermail/serviceability-dev/2013-August/011318.html
In short, setjmp/longjmp on OS X messes up the signal mask and we should use _setjmp/_longjmp instead. This change fixes two occurences in the jdk. There are a couple more in the client and hotspot areas which I will file followup bugs about. webrev: http://cr.openjdk.java.net/~sla/8023720/webrev.00/ Thanks, /Staffan
