hg: jdk7/hotspot-gc/hotspot: 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.

[tony.printezis at oracle.com]

Changeset: cd8e33b2a8ad
Author:    tonyp
Date:      2011-04-29 12:40 -0400
URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/cd8e33b2a8ad

7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
Summary: We were calling STS join and leave during a STW pause and we are not suppoesed to. I now only call those during  concurrent phase. I also added stress code in the non-product builds to force an overflows (the condition that ws uncovering the bug) to make sure it does not happen again.
Reviewed-by: johnc, brutisso

! src/share/vm/gc_implementation/g1/concurrentMark.cpp
! src/share/vm/gc_implementation/g1/concurrentMark.hpp
! src/share/vm/gc_implementation/g1/g1_globals.hpp