6735416: G1: runThese javasoft.sqe.tests.lang.thrd011.thrd01101.thrd01101 fails

6622418: G1: assert(false,"Non-balanced monitor enter/exit!") fails
Summary: The mark-sweep compact (which we use for full gc) wrapper did not save the mark words for biased locked objects.  The fix is to trivially call the appropriate methods.
Reviewed-by: tonyp, ysr

src/share/vm/gc_implementation/g1/g1MarkSweep.cpp

@@ -50,6 +50,10 @@ void G1MarkSweep::invoke_at_safepoint(ReferenceProcessor* rp,
 
   allocate_stacks();
 
+  // We should save the marks of the currently locked biased monitors.
+  // The marking doesn't preserve the marks of biased objects.
+  BiasedLocking::preserve_marks();
+
   mark_sweep_phase1(marked_for_unloading, clear_all_softrefs);
 
   if (G1VerifyConcMark) {
@@ -67,7 +71,7 @@ void G1MarkSweep::invoke_at_safepoint(ReferenceProcessor* rp,
   mark_sweep_phase4();
 
   GenMarkSweep::restore_marks();
-
+  BiasedLocking::restore_marks();
   GenMarkSweep::deallocate_stacks();
 
   // We must invalidate the perm-gen rs, so that it gets rebuilt.

src/share/vm/gc_implementation/includeDB_gc_g1

@@ -19,7 +19,7 @@
 // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 // CA 95054 USA or visit www.sun.com if you need additional information or
 // have any questions.
-//  
+//
 //
 
 // NOTE: DO NOT CHANGE THIS COPYRIGHT TO NEW STYLE - IT WILL BREAK makeDeps!
@@ -100,7 +100,7 @@ concurrentZFThread.cpp			space.inline.hpp
 
 concurrentZFThread.hpp			concurrentGCThread.hpp
 concurrentZFThread.hpp			coTracker.hpp
-	  
+
 dirtyCardQueue.cpp                      atomic.hpp
 dirtyCardQueue.cpp                      dirtyCardQueue.hpp
 dirtyCardQueue.cpp			heapRegionRemSet.hpp
@@ -183,6 +183,7 @@ globals.cpp                             g1_globals.hpp
 top.hpp                                 g1_globals.hpp
 
 g1MarkSweep.cpp                         aprofiler.hpp
+g1MarkSweep.cpp                         biasedLocking.hpp
 g1MarkSweep.cpp                         codeCache.hpp
 g1MarkSweep.cpp                         events.hpp
 g1MarkSweep.cpp                         fprofiler.hpp