hg: jdk9/hs-rt/hotspot: 8072147: Preloading libjsig.dylib causes deadlock when signal() is called

[david.buck at oracle.com]

Changeset: 660fa1b69f63
Author:    dbuck
Date:      2015-06-30 15:26 -0700
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/660fa1b69f63

8072147: Preloading libjsig.dylib causes deadlock when signal() is called
Summary: Added check to prevent reentry of signal chaining code
Reviewed-by: dcubed, acorn, dholmes

! src/os/bsd/vm/jsig.c