hg: jdk9/hs/hotspot: 8165372: StackWalker performance regression following JDK-8147039

[brent.christian at oracle.com]

Changeset: a6dab42b58af
Author:    bchristi
Date:      2016-09-20 10:04 -0700
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/a6dab42b58af

8165372: StackWalker performance regression following JDK-8147039
Summary: Stack walking can use javaVFrame or vframeStream
Reviewed-by: coleenp, mchung

! src/share/vm/prims/jvm.cpp
! src/share/vm/prims/stackwalk.cpp
! src/share/vm/prims/stackwalk.hpp