src/hotspot/share/gc/serial/genMarkSweep.cpp

*** 43,10 ***
--- 43,11 ---
  #include "gc/shared/generation.hpp"
  #include "gc/shared/genOopClosures.inline.hpp"
  #include "gc/shared/modRefBarrierSet.hpp"
  #include "gc/shared/referencePolicy.hpp"
  #include "gc/shared/referenceProcessorPhaseTimes.hpp"
+ #include "gc/shared/slidingForwarding.hpp"
  #include "gc/shared/space.hpp"
  #include "gc/shared/strongRootsScope.hpp"
  #include "gc/shared/weakProcessor.hpp"
  #include "memory/universe.hpp"
  #include "oops/instanceRefKlass.hpp"

*** 91,10 ***
--- 92,12 ---
  
    allocate_stacks();
  
    mark_sweep_phase1(clear_all_softrefs);
  
+   SlidingForwarding::begin();
+ 
    mark_sweep_phase2();
  
    // Don't add any more derived pointers during phase3
  #if COMPILER2_OR_JVMCI
    assert(DerivedPointerTable::is_active(), "Sanity");

*** 109,10 ***
--- 112,12 ---
  
    // Set saved marks for allocation profiler (and other things? -- dld)
    // (Should this be in general part?)
    gch->save_marks();
  
+   SlidingForwarding::end();
+ 
    deallocate_stacks();
  
    // If compaction completely evacuated the young generation then we
    // can clear the card table.  Otherwise, we must invalidate
    // it (consider all cards dirty).  In the future, we might consider doing

*** 269,22 ***
    GCTraceTime(Info, gc, phases) tm("Phase 3: Adjust pointers", gc_timer());
  
    // Need new claim bits for the pointer adjustment tracing.
    ClassLoaderDataGraph::clear_claimed_marks();
  
!   {
!     StrongRootsScope srs(0);
! 
!     gch->full_process_roots(true,  // this is the adjust phase
!                             GenCollectedHeap::SO_AllCodeCache,
!                             false, // all roots
!                             &adjust_pointer_closure,
!                             &adjust_cld_closure);
    }
- 
-   gch->gen_process_weak_roots(&adjust_pointer_closure);
- 
    adjust_marks();
    GenAdjustPointersClosure blk;
    gch->generation_iterate(&blk, true);
  }
  
--- 274,35 ---
    GCTraceTime(Info, gc, phases) tm("Phase 3: Adjust pointers", gc_timer());
  
    // Need new claim bits for the pointer adjustment tracing.
    ClassLoaderDataGraph::clear_claimed_marks();
  
!   if (UseAltGCForwarding) {
!     AdjustPointerClosure<true> adjust_pointer_closure;
!     CLDToOopClosure adjust_cld_closure(&adjust_pointer_closure, ClassLoaderData::_claim_strong);
!     {
!       StrongRootsScope srs(0);
!       gch->full_process_roots(true,  // this is the adjust phase
!                               GenCollectedHeap::SO_AllCodeCache,
!                               false, // all roots
+                               &adjust_pointer_closure,
+                               &adjust_cld_closure);
+     }
+     gch->gen_process_weak_roots(&adjust_pointer_closure);
+   } else {
+     AdjustPointerClosure<false> adjust_pointer_closure;
+     CLDToOopClosure adjust_cld_closure(&adjust_pointer_closure, ClassLoaderData::_claim_strong);
+     {
+       StrongRootsScope srs(0);
+       gch->full_process_roots(true,  // this is the adjust phase
+                               GenCollectedHeap::SO_AllCodeCache,
+                               false, // all roots
+                               &adjust_pointer_closure,
+                               &adjust_cld_closure);
+     }
+     gch->gen_process_weak_roots(&adjust_pointer_closure);
    }
    adjust_marks();
    GenAdjustPointersClosure blk;
    gch->generation_iterate(&blk, true);
  }