changeset 7486:f84495a81488

8065993: Merge OneContigSpaceCardGeneration with TenuredGeneration Reviewed-by: mgerdin, kbarrett
author brutisso
date Mon, 01 Dec 2014 14:37:25 +0100
parents a0dc758e76ef
children ba93958aad70 32fa0941fc95 29df282f63fe
files agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java agent/src/share/classes/sun/jvm/hotspot/memory/OneContigSpaceCardGeneration.java agent/src/share/classes/sun/jvm/hotspot/memory/TenuredGeneration.java src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.inline.hpp src/share/vm/gc_implementation/parNew/parNewGeneration.cpp src/share/vm/memory/cardTableModRefBS.cpp src/share/vm/memory/defNewGeneration.hpp src/share/vm/memory/genCollectedHeap.cpp src/share/vm/memory/genMarkSweep.cpp src/share/vm/memory/generation.cpp src/share/vm/memory/generation.hpp src/share/vm/memory/generation.inline.hpp src/share/vm/memory/space.hpp src/share/vm/memory/tenuredGeneration.cpp src/share/vm/memory/tenuredGeneration.hpp src/share/vm/memory/tenuredGeneration.inline.hpp src/share/vm/precompiled/precompiled.hpp src/share/vm/runtime/vmStructs.cpp
diffstat 19 files changed, 465 insertions(+), 546 deletions(-) [+]
line wrap: on
line diff
--- a/agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java	Tue Dec 02 09:51:16 2014 +0100
+++ b/agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java	Mon Dec 01 14:37:25 2014 +0100
@@ -37,10 +37,7 @@
       <ul>
       <li> CardGeneration
         <ul>
-        <li> OneContigSpaceCardGeneration
-          <ul>
-          <li> TenuredGeneration
-          </ul>
+        <li> TenuredGeneration
         </ul>
       <li> DefNewGeneration
       </ul>
--- a/agent/src/share/classes/sun/jvm/hotspot/memory/OneContigSpaceCardGeneration.java	Tue Dec 02 09:51:16 2014 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,82 +0,0 @@
-/*
- * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-package sun.jvm.hotspot.memory;
-
-import java.io.*;
-import java.util.*;
-
-import sun.jvm.hotspot.debugger.*;
-import sun.jvm.hotspot.runtime.*;
-import sun.jvm.hotspot.types.*;
-
-/** <P> OneSpaceOldGeneration models a heap of old objects contained
-    in a single contiguous space. </P>
-
-    <P> Garbage collection is performed using mark-compact. </P> */
-
-public abstract class OneContigSpaceCardGeneration extends CardGeneration {
-  private static AddressField theSpaceField;
-
-  static {
-    VM.registerVMInitializedObserver(new Observer() {
-        public void update(Observable o, Object data) {
-          initialize(VM.getVM().getTypeDataBase());
-        }
-      });
-  }
-
-  private static synchronized void initialize(TypeDataBase db) {
-    Type type = db.lookupType("OneContigSpaceCardGeneration");
-
-    theSpaceField = type.getAddressField("_the_space");
-  }
-
-  public OneContigSpaceCardGeneration(Address addr) {
-    super(addr);
-  }
-
-  public ContiguousSpace theSpace() {
-    return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, theSpaceField.getValue(addr));
-  }
-
-  public boolean isIn(Address p) {
-    return theSpace().contains(p);
-  }
-
-  /** Space queries */
-  public long capacity()            { return theSpace().capacity();                                }
-  public long used()                { return theSpace().used();                                    }
-  public long free()                { return theSpace().free();                                    }
-  public long contiguousAvailable() { return theSpace().free() + virtualSpace().uncommittedSize(); }
-
-  public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
-    blk.doSpace(theSpace());
-  }
-
-  public void printOn(PrintStream tty) {
-    tty.print("  old ");
-    theSpace().printOn(tty);
-  }
-}
--- a/agent/src/share/classes/sun/jvm/hotspot/memory/TenuredGeneration.java	Tue Dec 02 09:51:16 2014 +0100
+++ b/agent/src/share/classes/sun/jvm/hotspot/memory/TenuredGeneration.java	Mon Dec 01 14:37:25 2014 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,13 +24,62 @@
 
 package sun.jvm.hotspot.memory;
 
+import java.io.*;
+import java.util.*;
+
 import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
 
-public class TenuredGeneration extends OneContigSpaceCardGeneration {
+/** <P> TenuredGeneration models a heap of old objects contained
+    in a single contiguous space. </P>
+
+    <P> Garbage collection is performed using mark-compact. </P> */
+
+public class TenuredGeneration extends CardGeneration {
+  private static AddressField theSpaceField;
+
+  static {
+    VM.registerVMInitializedObserver(new Observer() {
+        public void update(Observable o, Object data) {
+          initialize(VM.getVM().getTypeDataBase());
+        }
+      });
+  }
+
+  private static synchronized void initialize(TypeDataBase db) {
+    Type type = db.lookupType("TenuredGeneration");
+
+    theSpaceField = type.getAddressField("_the_space");
+  }
+
   public TenuredGeneration(Address addr) {
     super(addr);
   }
 
+  public ContiguousSpace theSpace() {
+    return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, theSpaceField.getValue(addr));
+  }
+
+  public boolean isIn(Address p) {
+    return theSpace().contains(p);
+  }
+
+  /** Space queries */
+  public long capacity()            { return theSpace().capacity();                                }
+  public long used()                { return theSpace().used();                                    }
+  public long free()                { return theSpace().free();                                    }
+  public long contiguousAvailable() { return theSpace().free() + virtualSpace().uncommittedSize(); }
+
+  public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
+    blk.doSpace(theSpace());
+  }
+
+  public void printOn(PrintStream tty) {
+    tty.print("  old ");
+    theSpace().printOn(tty);
+  }
+
   public Generation.Name kind() {
     return Generation.Name.MARK_SWEEP_COMPACT;
   }
--- a/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp	Mon Dec 01 14:37:25 2014 +0100
@@ -2812,7 +2812,7 @@
 }
 
 // YSR: All of this generation expansion/shrinking stuff is an exact copy of
-// OneContigSpaceCardGeneration, which makes me wonder if we should move this
+// TenuredGeneration, which makes me wonder if we should move this
 // to CardGeneration and share it...
 bool ConcurrentMarkSweepGeneration::expand(size_t bytes, size_t expand_bytes) {
   return CardGeneration::expand(bytes, expand_bytes);
--- a/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.inline.hpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.inline.hpp	Mon Dec 01 14:37:25 2014 +0100
@@ -31,6 +31,7 @@
 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
 #include "gc_implementation/parNew/parNewGeneration.hpp"
 #include "gc_implementation/shared/gcUtil.hpp"
+#include "memory/genCollectedHeap.hpp"
 
 inline void CMSBitMap::clear_all() {
   assert_locked();
--- a/src/share/vm/gc_implementation/parNew/parNewGeneration.cpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/gc_implementation/parNew/parNewGeneration.cpp	Mon Dec 01 14:37:25 2014 +0100
@@ -39,7 +39,6 @@
 #include "memory/genCollectedHeap.hpp"
 #include "memory/genOopClosures.inline.hpp"
 #include "memory/generation.hpp"
-#include "memory/generation.inline.hpp"
 #include "memory/referencePolicy.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/sharedHeap.hpp"
--- a/src/share/vm/memory/cardTableModRefBS.cpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/cardTableModRefBS.cpp	Mon Dec 01 14:37:25 2014 +0100
@@ -462,19 +462,6 @@
     // equal to active_workers.  When a different mechanism for shutting
     // off parallelism is used, then active_workers can be used in
     // place of n_par_threads.
-    //  This is an example of a path where n_par_threads is
-    // set to 0 to turn off parallelism.
-    //  [7] CardTableModRefBS::non_clean_card_iterate()
-    //  [8] CardTableRS::younger_refs_in_space_iterate()
-    //  [9] Generation::younger_refs_in_space_iterate()
-    //  [10] OneContigSpaceCardGeneration::younger_refs_iterate()
-    //  [11] CompactingPermGenGen::younger_refs_iterate()
-    //  [12] CardTableRS::younger_refs_iterate()
-    //  [13] SharedHeap::process_strong_roots()
-    //  [14] G1CollectedHeap::verify()
-    //  [15] Universe::verify()
-    //  [16] G1CollectedHeap::do_collection_pause_at_safepoint()
-    //
     int n_threads =  SharedHeap::heap()->n_par_threads();
     bool is_par = n_threads > 0;
     if (is_par) {
--- a/src/share/vm/memory/defNewGeneration.hpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/defNewGeneration.hpp	Mon Dec 01 14:37:25 2014 +0100
@@ -29,7 +29,6 @@
 #include "gc_implementation/shared/cSpaceCounters.hpp"
 #include "gc_implementation/shared/generationCounters.hpp"
 #include "gc_implementation/shared/copyFailedInfo.hpp"
-#include "memory/generation.inline.hpp"
 #include "utilities/stack.hpp"
 
 class ContiguousSpace;
--- a/src/share/vm/memory/genCollectedHeap.cpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/genCollectedHeap.cpp	Mon Dec 01 14:37:25 2014 +0100
@@ -36,7 +36,6 @@
 #include "memory/gcLocker.inline.hpp"
 #include "memory/genCollectedHeap.hpp"
 #include "memory/genOopClosures.inline.hpp"
-#include "memory/generation.inline.hpp"
 #include "memory/generationSpec.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/sharedHeap.hpp"
--- a/src/share/vm/memory/genMarkSweep.cpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/genMarkSweep.cpp	Mon Dec 01 14:37:25 2014 +0100
@@ -37,7 +37,6 @@
 #include "memory/genCollectedHeap.hpp"
 #include "memory/genMarkSweep.hpp"
 #include "memory/genOopClosures.inline.hpp"
-#include "memory/generation.inline.hpp"
 #include "memory/modRefBarrierSet.hpp"
 #include "memory/referencePolicy.hpp"
 #include "memory/space.hpp"
--- a/src/share/vm/memory/generation.cpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/generation.cpp	Mon Dec 01 14:37:25 2014 +0100
@@ -36,7 +36,6 @@
 #include "memory/genOopClosures.hpp"
 #include "memory/genOopClosures.inline.hpp"
 #include "memory/generation.hpp"
-#include "memory/generation.inline.hpp"
 #include "memory/space.inline.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/java.hpp"
@@ -603,252 +602,3 @@
 // Currently nothing to do.
 void CardGeneration::prepare_for_verify() {}
 
-
-void OneContigSpaceCardGeneration::collect(bool   full,
-                                           bool   clear_all_soft_refs,
-                                           size_t size,
-                                           bool   is_tlab) {
-  GenCollectedHeap* gch = GenCollectedHeap::heap();
-
-  SpecializationStats::clear();
-  // Temporarily expand the span of our ref processor, so
-  // refs discovery is over the entire heap, not just this generation
-  ReferenceProcessorSpanMutator
-    x(ref_processor(), gch->reserved_region());
-
-  STWGCTimer* gc_timer = GenMarkSweep::gc_timer();
-  gc_timer->register_gc_start();
-
-  SerialOldTracer* gc_tracer = GenMarkSweep::gc_tracer();
-  gc_tracer->report_gc_start(gch->gc_cause(), gc_timer->gc_start());
-
-  GenMarkSweep::invoke_at_safepoint(_level, ref_processor(), clear_all_soft_refs);
-
-  gc_timer->register_gc_end();
-
-  gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions());
-
-  SpecializationStats::print();
-}
-
-HeapWord*
-OneContigSpaceCardGeneration::expand_and_allocate(size_t word_size,
-                                                  bool is_tlab,
-                                                  bool parallel) {
-  assert(!is_tlab, "OneContigSpaceCardGeneration does not support TLAB allocation");
-  if (parallel) {
-    MutexLocker x(ParGCRareEvent_lock);
-    HeapWord* result = NULL;
-    size_t byte_size = word_size * HeapWordSize;
-    while (true) {
-      expand(byte_size, _min_heap_delta_bytes);
-      if (GCExpandToAllocateDelayMillis > 0) {
-        os::sleep(Thread::current(), GCExpandToAllocateDelayMillis, false);
-      }
-      result = _the_space->par_allocate(word_size);
-      if ( result != NULL) {
-        return result;
-      } else {
-        // If there's not enough expansion space available, give up.
-        if (_virtual_space.uncommitted_size() < byte_size) {
-          return NULL;
-        }
-        // else try again
-      }
-    }
-  } else {
-    expand(word_size*HeapWordSize, _min_heap_delta_bytes);
-    return _the_space->allocate(word_size);
-  }
-}
-
-bool OneContigSpaceCardGeneration::expand(size_t bytes, size_t expand_bytes) {
-  GCMutexLocker x(ExpandHeap_lock);
-  return CardGeneration::expand(bytes, expand_bytes);
-}
-
-
-void OneContigSpaceCardGeneration::shrink(size_t bytes) {
-  assert_locked_or_safepoint(ExpandHeap_lock);
-  size_t size = ReservedSpace::page_align_size_down(bytes);
-  if (size > 0) {
-    shrink_by(size);
-  }
-}
-
-
-size_t OneContigSpaceCardGeneration::capacity() const {
-  return _the_space->capacity();
-}
-
-
-size_t OneContigSpaceCardGeneration::used() const {
-  return _the_space->used();
-}
-
-
-size_t OneContigSpaceCardGeneration::free() const {
-  return _the_space->free();
-}
-
-MemRegion OneContigSpaceCardGeneration::used_region() const {
-  return the_space()->used_region();
-}
-
-size_t OneContigSpaceCardGeneration::unsafe_max_alloc_nogc() const {
-  return _the_space->free();
-}
-
-size_t OneContigSpaceCardGeneration::contiguous_available() const {
-  return _the_space->free() + _virtual_space.uncommitted_size();
-}
-
-bool OneContigSpaceCardGeneration::grow_by(size_t bytes) {
-  assert_locked_or_safepoint(ExpandHeap_lock);
-  bool result = _virtual_space.expand_by(bytes);
-  if (result) {
-    size_t new_word_size =
-       heap_word_size(_virtual_space.committed_size());
-    MemRegion mr(_the_space->bottom(), new_word_size);
-    // Expand card table
-    Universe::heap()->barrier_set()->resize_covered_region(mr);
-    // Expand shared block offset array
-    _bts->resize(new_word_size);
-
-    // Fix for bug #4668531
-    if (ZapUnusedHeapArea) {
-      MemRegion mangle_region(_the_space->end(),
-      (HeapWord*)_virtual_space.high());
-      SpaceMangler::mangle_region(mangle_region);
-    }
-
-    // Expand space -- also expands space's BOT
-    // (which uses (part of) shared array above)
-    _the_space->set_end((HeapWord*)_virtual_space.high());
-
-    // update the space and generation capacity counters
-    update_counters();
-
-    if (Verbose && PrintGC) {
-      size_t new_mem_size = _virtual_space.committed_size();
-      size_t old_mem_size = new_mem_size - bytes;
-      gclog_or_tty->print_cr("Expanding %s from " SIZE_FORMAT "K by "
-                      SIZE_FORMAT "K to " SIZE_FORMAT "K",
-                      name(), old_mem_size/K, bytes/K, new_mem_size/K);
-    }
-  }
-  return result;
-}
-
-
-bool OneContigSpaceCardGeneration::grow_to_reserved() {
-  assert_locked_or_safepoint(ExpandHeap_lock);
-  bool success = true;
-  const size_t remaining_bytes = _virtual_space.uncommitted_size();
-  if (remaining_bytes > 0) {
-    success = grow_by(remaining_bytes);
-    DEBUG_ONLY(if (!success) warning("grow to reserved failed");)
-  }
-  return success;
-}
-
-void OneContigSpaceCardGeneration::shrink_by(size_t bytes) {
-  assert_locked_or_safepoint(ExpandHeap_lock);
-  // Shrink committed space
-  _virtual_space.shrink_by(bytes);
-  // Shrink space; this also shrinks the space's BOT
-  _the_space->set_end((HeapWord*) _virtual_space.high());
-  size_t new_word_size = heap_word_size(_the_space->capacity());
-  // Shrink the shared block offset array
-  _bts->resize(new_word_size);
-  MemRegion mr(_the_space->bottom(), new_word_size);
-  // Shrink the card table
-  Universe::heap()->barrier_set()->resize_covered_region(mr);
-
-  if (Verbose && PrintGC) {
-    size_t new_mem_size = _virtual_space.committed_size();
-    size_t old_mem_size = new_mem_size + bytes;
-    gclog_or_tty->print_cr("Shrinking %s from " SIZE_FORMAT "K to " SIZE_FORMAT "K",
-                  name(), old_mem_size/K, new_mem_size/K);
-  }
-}
-
-// Currently nothing to do.
-void OneContigSpaceCardGeneration::prepare_for_verify() {}
-
-
-// Override for a card-table generation with one contiguous
-// space. NOTE: For reasons that are lost in the fog of history,
-// this code is used when you iterate over perm gen objects,
-// even when one uses CDS, where the perm gen has a couple of
-// other spaces; this is because CompactingPermGenGen derives
-// from OneContigSpaceCardGeneration. This should be cleaned up,
-// see CR 6897789..
-void OneContigSpaceCardGeneration::object_iterate(ObjectClosure* blk) {
-  _the_space->object_iterate(blk);
-}
-
-void OneContigSpaceCardGeneration::space_iterate(SpaceClosure* blk,
-                                                 bool usedOnly) {
-  blk->do_space(_the_space);
-}
-
-void OneContigSpaceCardGeneration::younger_refs_iterate(OopsInGenClosure* blk) {
-  blk->set_generation(this);
-  younger_refs_in_space_iterate(_the_space, blk);
-  blk->reset_generation();
-}
-
-void OneContigSpaceCardGeneration::save_marks() {
-  _the_space->set_saved_mark();
-}
-
-
-void OneContigSpaceCardGeneration::reset_saved_marks() {
-  _the_space->reset_saved_mark();
-}
-
-
-bool OneContigSpaceCardGeneration::no_allocs_since_save_marks() {
-  return _the_space->saved_mark_at_top();
-}
-
-#define OneContig_SINCE_SAVE_MARKS_ITERATE_DEFN(OopClosureType, nv_suffix)      \
-                                                                                \
-void OneContigSpaceCardGeneration::                                             \
-oop_since_save_marks_iterate##nv_suffix(OopClosureType* blk) {                  \
-  blk->set_generation(this);                                                    \
-  _the_space->oop_since_save_marks_iterate##nv_suffix(blk);                     \
-  blk->reset_generation();                                                      \
-  save_marks();                                                                 \
-}
-
-ALL_SINCE_SAVE_MARKS_CLOSURES(OneContig_SINCE_SAVE_MARKS_ITERATE_DEFN)
-
-#undef OneContig_SINCE_SAVE_MARKS_ITERATE_DEFN
-
-
-void OneContigSpaceCardGeneration::gc_epilogue(bool full) {
-  _last_gc = WaterMark(the_space(), the_space()->top());
-
-  // update the generation and space performance counters
-  update_counters();
-  if (ZapUnusedHeapArea) {
-    the_space()->check_mangled_unused_area_complete();
-  }
-}
-
-void OneContigSpaceCardGeneration::record_spaces_top() {
-  assert(ZapUnusedHeapArea, "Not mangling unused space");
-  the_space()->set_top_for_allocations();
-}
-
-void OneContigSpaceCardGeneration::verify() {
-  the_space()->verify();
-}
-
-void OneContigSpaceCardGeneration::print_on(outputStream* st)  const {
-  Generation::print_on(st);
-  st->print("   the");
-  the_space()->print_on(st);
-}
--- a/src/share/vm/memory/generation.hpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/generation.hpp	Mon Dec 01 14:37:25 2014 +0100
@@ -45,9 +45,7 @@
 //   - ParNewGeneration            - a DefNewGeneration that is collected by
 //                                   several threads
 // - CardGeneration                 - abstract class adding offset array behavior
-//   - OneContigSpaceCardGeneration - abstract class holding a single
-//                                    contiguous space with card marking
-//     - TenuredGeneration         - tenured (old object) space (markSweepCompact)
+//   - TenuredGeneration             - tenured (old object) space (markSweepCompact)
 //   - ConcurrentMarkSweepGeneration - Mostly Concurrent Mark Sweep Generation
 //                                       (Detlefs-Printezis refinement of
 //                                       Boehm-Demers-Schenker)
@@ -55,9 +53,7 @@
 // The system configurations currently allowed are:
 //
 //   DefNewGeneration + TenuredGeneration
-//   DefNewGeneration + ConcurrentMarkSweepGeneration
 //
-//   ParNewGeneration + TenuredGeneration
 //   ParNewGeneration + ConcurrentMarkSweepGeneration
 //
 
@@ -641,99 +637,4 @@
   virtual bool grow_to_reserved() = 0;
 };
 
-// OneContigSpaceCardGeneration models a heap of old objects contained in a single
-// contiguous space.
-//
-// Garbage collection is performed using mark-compact.
-
-class OneContigSpaceCardGeneration: public CardGeneration {
-  friend class VMStructs;
-  // Abstractly, this is a subtype that gets access to protected fields.
-  friend class VM_PopulateDumpSharedSpace;
-
- protected:
-  ContiguousSpace*  _the_space;       // actual space holding objects
-  WaterMark  _last_gc;                // watermark between objects allocated before
-                                      // and after last GC.
-
-  // Grow generation with specified size (returns false if unable to grow)
-  virtual bool grow_by(size_t bytes);
-  // Grow generation to reserved size.
-  virtual bool grow_to_reserved();
-  // Shrink generation with specified size (returns false if unable to shrink)
-  void shrink_by(size_t bytes);
-
-  // Allocation failure
-  virtual bool expand(size_t bytes, size_t expand_bytes);
-  void shrink(size_t bytes);
-
-  // Accessing spaces
-  ContiguousSpace* the_space() const { return _the_space; }
-
- public:
-  OneContigSpaceCardGeneration(ReservedSpace rs, size_t initial_byte_size,
-                               int level, GenRemSet* remset,
-                               ContiguousSpace* space) :
-    CardGeneration(rs, initial_byte_size, level, remset),
-    _the_space(space)
-  {}
-
-  inline bool is_in(const void* p) const;
-
-  // Space enquiries
-  size_t capacity() const;
-  size_t used() const;
-  size_t free() const;
-
-  MemRegion used_region() const;
-
-  size_t unsafe_max_alloc_nogc() const;
-  size_t contiguous_available() const;
-
-  // Iteration
-  void object_iterate(ObjectClosure* blk);
-  void space_iterate(SpaceClosure* blk, bool usedOnly = false);
-
-  void younger_refs_iterate(OopsInGenClosure* blk);
-
-  inline CompactibleSpace* first_compaction_space() const;
-
-  virtual inline HeapWord* allocate(size_t word_size, bool is_tlab);
-  virtual inline HeapWord* par_allocate(size_t word_size, bool is_tlab);
-
-  // Accessing marks
-  inline WaterMark top_mark();
-  inline WaterMark bottom_mark();
-
-#define OneContig_SINCE_SAVE_MARKS_DECL(OopClosureType, nv_suffix)      \
-  void oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl);
-  OneContig_SINCE_SAVE_MARKS_DECL(OopsInGenClosure,_v)
-  SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(OneContig_SINCE_SAVE_MARKS_DECL)
-
-  void save_marks();
-  void reset_saved_marks();
-  bool no_allocs_since_save_marks();
-
-  inline size_t block_size(const HeapWord* addr) const;
-
-  inline bool block_is_obj(const HeapWord* addr) const;
-
-  virtual void collect(bool full,
-                       bool clear_all_soft_refs,
-                       size_t size,
-                       bool is_tlab);
-  HeapWord* expand_and_allocate(size_t size,
-                                bool is_tlab,
-                                bool parallel = false);
-
-  virtual void prepare_for_verify();
-
-  virtual void gc_epilogue(bool full);
-
-  virtual void record_spaces_top();
-
-  virtual void verify();
-  virtual void print_on(outputStream* st) const;
-};
-
 #endif // SHARE_VM_MEMORY_GENERATION_HPP
--- a/src/share/vm/memory/generation.inline.hpp	Tue Dec 02 09:51:16 2014 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,74 +0,0 @@
-/*
- * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#ifndef SHARE_VM_MEMORY_GENERATION_INLINE_HPP
-#define SHARE_VM_MEMORY_GENERATION_INLINE_HPP
-
-#include "memory/genCollectedHeap.hpp"
-#include "memory/generation.hpp"
-#include "memory/space.hpp"
-
-bool OneContigSpaceCardGeneration::is_in(const void* p) const {
-  return the_space()->is_in(p);
-}
-
-
-WaterMark OneContigSpaceCardGeneration::top_mark() {
-  return the_space()->top_mark();
-}
-
-CompactibleSpace*
-OneContigSpaceCardGeneration::first_compaction_space() const {
-  return the_space();
-}
-
-HeapWord* OneContigSpaceCardGeneration::allocate(size_t word_size,
-                                                 bool is_tlab) {
-  assert(!is_tlab, "OneContigSpaceCardGeneration does not support TLAB allocation");
-  return the_space()->allocate(word_size);
-}
-
-HeapWord* OneContigSpaceCardGeneration::par_allocate(size_t word_size,
-                                                     bool is_tlab) {
-  assert(!is_tlab, "OneContigSpaceCardGeneration does not support TLAB allocation");
-  return the_space()->par_allocate(word_size);
-}
-
-WaterMark OneContigSpaceCardGeneration::bottom_mark() {
-  return the_space()->bottom_mark();
-}
-
-size_t OneContigSpaceCardGeneration::block_size(const HeapWord* addr) const {
-  if (addr < the_space()->top()) return oop(addr)->size();
-  else {
-    assert(addr == the_space()->top(), "non-block head arg to block_size");
-    return the_space()->_end - the_space()->top();
-  }
-}
-
-bool OneContigSpaceCardGeneration::block_is_obj(const HeapWord* addr) const {
-  return addr < the_space()->top();
-}
-
-#endif // SHARE_VM_MEMORY_GENERATION_INLINE_HPP
--- a/src/share/vm/memory/space.hpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/space.hpp	Mon Dec 01 14:37:25 2014 +0100
@@ -495,7 +495,6 @@
 // A space in which the free area is contiguous.  It therefore supports
 // faster allocation, and compaction.
 class ContiguousSpace: public CompactibleSpace {
-  friend class OneContigSpaceCardGeneration;
   friend class VMStructs;
   // Allow scan_and_forward function to call (private) overrides for auxiliary functions on this class
   template <typename SpaceType>
--- a/src/share/vm/memory/tenuredGeneration.cpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/tenuredGeneration.cpp	Mon Dec 01 14:37:25 2014 +0100
@@ -24,13 +24,15 @@
 
 #include "precompiled.hpp"
 #include "gc_implementation/shared/collectorCounters.hpp"
+#include "gc_implementation/shared/gcTimer.hpp"
 #include "gc_implementation/shared/parGCAllocBuffer.hpp"
 #include "memory/allocation.inline.hpp"
 #include "memory/blockOffsetTable.inline.hpp"
-#include "memory/generation.inline.hpp"
 #include "memory/generationSpec.hpp"
+#include "memory/genMarkSweep.hpp"
+#include "memory/genOopClosures.inline.hpp"
 #include "memory/space.hpp"
-#include "memory/tenuredGeneration.hpp"
+#include "memory/tenuredGeneration.inline.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/java.hpp"
 #include "utilities/macros.hpp"
@@ -38,8 +40,7 @@
 TenuredGeneration::TenuredGeneration(ReservedSpace rs,
                                      size_t initial_byte_size, int level,
                                      GenRemSet* remset) :
-  OneContigSpaceCardGeneration(rs, initial_byte_size,
-                               level, remset, NULL)
+  CardGeneration(rs, initial_byte_size, level, remset)
 {
   HeapWord* bottom = (HeapWord*) _virtual_space.low();
   HeapWord* end    = (HeapWord*) _virtual_space.high();
@@ -170,3 +171,244 @@
   }
   return res;
 }
+
+void TenuredGeneration::collect(bool   full,
+                                bool   clear_all_soft_refs,
+                                size_t size,
+                                bool   is_tlab) {
+  GenCollectedHeap* gch = GenCollectedHeap::heap();
+
+  SpecializationStats::clear();
+  // Temporarily expand the span of our ref processor, so
+  // refs discovery is over the entire heap, not just this generation
+  ReferenceProcessorSpanMutator
+    x(ref_processor(), gch->reserved_region());
+
+  STWGCTimer* gc_timer = GenMarkSweep::gc_timer();
+  gc_timer->register_gc_start();
+
+  SerialOldTracer* gc_tracer = GenMarkSweep::gc_tracer();
+  gc_tracer->report_gc_start(gch->gc_cause(), gc_timer->gc_start());
+
+  GenMarkSweep::invoke_at_safepoint(_level, ref_processor(), clear_all_soft_refs);
+
+  gc_timer->register_gc_end();
+
+  gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions());
+
+  SpecializationStats::print();
+}
+
+HeapWord*
+TenuredGeneration::expand_and_allocate(size_t word_size,
+                                       bool is_tlab,
+                                       bool parallel) {
+  assert(!is_tlab, "TenuredGeneration does not support TLAB allocation");
+  if (parallel) {
+    MutexLocker x(ParGCRareEvent_lock);
+    HeapWord* result = NULL;
+    size_t byte_size = word_size * HeapWordSize;
+    while (true) {
+      expand(byte_size, _min_heap_delta_bytes);
+      if (GCExpandToAllocateDelayMillis > 0) {
+        os::sleep(Thread::current(), GCExpandToAllocateDelayMillis, false);
+      }
+      result = _the_space->par_allocate(word_size);
+      if ( result != NULL) {
+        return result;
+      } else {
+        // If there's not enough expansion space available, give up.
+        if (_virtual_space.uncommitted_size() < byte_size) {
+          return NULL;
+        }
+        // else try again
+      }
+    }
+  } else {
+    expand(word_size*HeapWordSize, _min_heap_delta_bytes);
+    return _the_space->allocate(word_size);
+  }
+}
+
+bool TenuredGeneration::expand(size_t bytes, size_t expand_bytes) {
+  GCMutexLocker x(ExpandHeap_lock);
+  return CardGeneration::expand(bytes, expand_bytes);
+}
+
+
+void TenuredGeneration::shrink(size_t bytes) {
+  assert_locked_or_safepoint(ExpandHeap_lock);
+  size_t size = ReservedSpace::page_align_size_down(bytes);
+  if (size > 0) {
+    shrink_by(size);
+  }
+}
+
+
+size_t TenuredGeneration::capacity() const {
+  return _the_space->capacity();
+}
+
+
+size_t TenuredGeneration::used() const {
+  return _the_space->used();
+}
+
+
+size_t TenuredGeneration::free() const {
+  return _the_space->free();
+}
+
+MemRegion TenuredGeneration::used_region() const {
+  return the_space()->used_region();
+}
+
+size_t TenuredGeneration::unsafe_max_alloc_nogc() const {
+  return _the_space->free();
+}
+
+size_t TenuredGeneration::contiguous_available() const {
+  return _the_space->free() + _virtual_space.uncommitted_size();
+}
+
+bool TenuredGeneration::grow_by(size_t bytes) {
+  assert_locked_or_safepoint(ExpandHeap_lock);
+  bool result = _virtual_space.expand_by(bytes);
+  if (result) {
+    size_t new_word_size =
+       heap_word_size(_virtual_space.committed_size());
+    MemRegion mr(_the_space->bottom(), new_word_size);
+    // Expand card table
+    Universe::heap()->barrier_set()->resize_covered_region(mr);
+    // Expand shared block offset array
+    _bts->resize(new_word_size);
+
+    // Fix for bug #4668531
+    if (ZapUnusedHeapArea) {
+      MemRegion mangle_region(_the_space->end(),
+      (HeapWord*)_virtual_space.high());
+      SpaceMangler::mangle_region(mangle_region);
+    }
+
+    // Expand space -- also expands space's BOT
+    // (which uses (part of) shared array above)
+    _the_space->set_end((HeapWord*)_virtual_space.high());
+
+    // update the space and generation capacity counters
+    update_counters();
+
+    if (Verbose && PrintGC) {
+      size_t new_mem_size = _virtual_space.committed_size();
+      size_t old_mem_size = new_mem_size - bytes;
+      gclog_or_tty->print_cr("Expanding %s from " SIZE_FORMAT "K by "
+                      SIZE_FORMAT "K to " SIZE_FORMAT "K",
+                      name(), old_mem_size/K, bytes/K, new_mem_size/K);
+    }
+  }
+  return result;
+}
+
+
+bool TenuredGeneration::grow_to_reserved() {
+  assert_locked_or_safepoint(ExpandHeap_lock);
+  bool success = true;
+  const size_t remaining_bytes = _virtual_space.uncommitted_size();
+  if (remaining_bytes > 0) {
+    success = grow_by(remaining_bytes);
+    DEBUG_ONLY(if (!success) warning("grow to reserved failed");)
+  }
+  return success;
+}
+
+void TenuredGeneration::shrink_by(size_t bytes) {
+  assert_locked_or_safepoint(ExpandHeap_lock);
+  // Shrink committed space
+  _virtual_space.shrink_by(bytes);
+  // Shrink space; this also shrinks the space's BOT
+  _the_space->set_end((HeapWord*) _virtual_space.high());
+  size_t new_word_size = heap_word_size(_the_space->capacity());
+  // Shrink the shared block offset array
+  _bts->resize(new_word_size);
+  MemRegion mr(_the_space->bottom(), new_word_size);
+  // Shrink the card table
+  Universe::heap()->barrier_set()->resize_covered_region(mr);
+
+  if (Verbose && PrintGC) {
+    size_t new_mem_size = _virtual_space.committed_size();
+    size_t old_mem_size = new_mem_size + bytes;
+    gclog_or_tty->print_cr("Shrinking %s from " SIZE_FORMAT "K to " SIZE_FORMAT "K",
+                  name(), old_mem_size/K, new_mem_size/K);
+  }
+}
+
+// Currently nothing to do.
+void TenuredGeneration::prepare_for_verify() {}
+
+void TenuredGeneration::object_iterate(ObjectClosure* blk) {
+  _the_space->object_iterate(blk);
+}
+
+void TenuredGeneration::space_iterate(SpaceClosure* blk,
+                                                 bool usedOnly) {
+  blk->do_space(_the_space);
+}
+
+void TenuredGeneration::younger_refs_iterate(OopsInGenClosure* blk) {
+  blk->set_generation(this);
+  younger_refs_in_space_iterate(_the_space, blk);
+  blk->reset_generation();
+}
+
+void TenuredGeneration::save_marks() {
+  _the_space->set_saved_mark();
+}
+
+
+void TenuredGeneration::reset_saved_marks() {
+  _the_space->reset_saved_mark();
+}
+
+
+bool TenuredGeneration::no_allocs_since_save_marks() {
+  return _the_space->saved_mark_at_top();
+}
+
+#define TenuredGen_SINCE_SAVE_MARKS_ITERATE_DEFN(OopClosureType, nv_suffix)     \
+                                                                                \
+void TenuredGeneration::                                                        \
+oop_since_save_marks_iterate##nv_suffix(OopClosureType* blk) {                  \
+  blk->set_generation(this);                                                    \
+  _the_space->oop_since_save_marks_iterate##nv_suffix(blk);                     \
+  blk->reset_generation();                                                      \
+  save_marks();                                                                 \
+}
+
+ALL_SINCE_SAVE_MARKS_CLOSURES(TenuredGen_SINCE_SAVE_MARKS_ITERATE_DEFN)
+
+#undef TenuredGen_SINCE_SAVE_MARKS_ITERATE_DEFN
+
+
+void TenuredGeneration::gc_epilogue(bool full) {
+  _last_gc = WaterMark(the_space(), the_space()->top());
+
+  // update the generation and space performance counters
+  update_counters();
+  if (ZapUnusedHeapArea) {
+    the_space()->check_mangled_unused_area_complete();
+  }
+}
+
+void TenuredGeneration::record_spaces_top() {
+  assert(ZapUnusedHeapArea, "Not mangling unused space");
+  the_space()->set_top_for_allocations();
+}
+
+void TenuredGeneration::verify() {
+  the_space()->verify();
+}
+
+void TenuredGeneration::print_on(outputStream* st)  const {
+  Generation::print_on(st);
+  st->print("   the");
+  the_space()->print_on(st);
+}
--- a/src/share/vm/memory/tenuredGeneration.hpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/memory/tenuredGeneration.hpp	Mon Dec 01 14:37:25 2014 +0100
@@ -31,17 +31,41 @@
 #include "memory/generation.hpp"
 #include "utilities/macros.hpp"
 
-// TenuredGeneration models the heap containing old (promoted/tenured) objects.
+// TenuredGeneration models the heap containing old (promoted/tenured) objects
+// contained in a single contiguous space.
+//
+// Garbage collection is performed using mark-compact.
 
-class TenuredGeneration: public OneContigSpaceCardGeneration {
+class TenuredGeneration: public CardGeneration {
   friend class VMStructs;
+  // Abstractly, this is a subtype that gets access to protected fields.
+  friend class VM_PopulateDumpSharedSpace;
+
  protected:
+  ContiguousSpace*  _the_space;       // actual space holding objects
+  WaterMark  _last_gc;                // watermark between objects allocated before
+                                      // and after last GC.
+
   GenerationCounters*   _gen_counters;
   CSpaceCounters*       _space_counters;
 
+  // Grow generation with specified size (returns false if unable to grow)
+  virtual bool grow_by(size_t bytes);
+  // Grow generation to reserved size.
+  virtual bool grow_to_reserved();
+  // Shrink generation with specified size (returns false if unable to shrink)
+  void shrink_by(size_t bytes);
+
+  // Allocation failure
+  virtual bool expand(size_t bytes, size_t expand_bytes);
+  void shrink(size_t bytes);
+
+  // Accessing spaces
+  ContiguousSpace* the_space() const { return _the_space; }
+
  public:
-  TenuredGeneration(ReservedSpace rs, size_t initial_byte_size, int level,
-                    GenRemSet* remset);
+  TenuredGeneration(ReservedSpace rs, size_t initial_byte_size,
+                               int level, GenRemSet* remset);
 
   Generation::Name kind() { return Generation::MarkSweepCompact; }
 
@@ -57,7 +81,59 @@
     return !ScavengeBeforeFullGC;
   }
 
+  inline bool is_in(const void* p) const;
+
+  // Space enquiries
+  size_t capacity() const;
+  size_t used() const;
+  size_t free() const;
+
+  MemRegion used_region() const;
+
+  size_t unsafe_max_alloc_nogc() const;
+  size_t contiguous_available() const;
+
+  // Iteration
+  void object_iterate(ObjectClosure* blk);
+  void space_iterate(SpaceClosure* blk, bool usedOnly = false);
+
+  void younger_refs_iterate(OopsInGenClosure* blk);
+
+  inline CompactibleSpace* first_compaction_space() const;
+
+  virtual inline HeapWord* allocate(size_t word_size, bool is_tlab);
+  virtual inline HeapWord* par_allocate(size_t word_size, bool is_tlab);
+
+  // Accessing marks
+  inline WaterMark top_mark();
+  inline WaterMark bottom_mark();
+
+#define TenuredGen_SINCE_SAVE_MARKS_DECL(OopClosureType, nv_suffix)     \
+  void oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl);
+  TenuredGen_SINCE_SAVE_MARKS_DECL(OopsInGenClosure,_v)
+  SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(TenuredGen_SINCE_SAVE_MARKS_DECL)
+
+  void save_marks();
+  void reset_saved_marks();
+  bool no_allocs_since_save_marks();
+
+  inline size_t block_size(const HeapWord* addr) const;
+
+  inline bool block_is_obj(const HeapWord* addr) const;
+
+  virtual void collect(bool full,
+                       bool clear_all_soft_refs,
+                       size_t size,
+                       bool is_tlab);
+  HeapWord* expand_and_allocate(size_t size,
+                                bool is_tlab,
+                                bool parallel = false);
+
+  virtual void prepare_for_verify();
+
+
   virtual void gc_prologue(bool full);
+  virtual void gc_epilogue(bool full);
   bool should_collect(bool   full,
                       size_t word_size,
                       bool   is_tlab);
@@ -67,11 +143,16 @@
   // Performance Counter support
   void update_counters();
 
+  virtual void record_spaces_top();
+
   // Statistics
 
   virtual void update_gc_stats(int level, bool full);
 
   virtual bool promotion_attempt_is_safe(size_t max_promoted_in_bytes) const;
+
+  virtual void verify();
+  virtual void print_on(outputStream* st) const;
 };
 
 #endif // SHARE_VM_MEMORY_TENUREDGENERATION_HPP
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/memory/tenuredGeneration.inline.hpp	Mon Dec 01 14:37:25 2014 +0100
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_MEMORY_GENERATION_INLINE_HPP
+#define SHARE_VM_MEMORY_GENERATION_INLINE_HPP
+
+#include "memory/genCollectedHeap.hpp"
+#include "memory/space.hpp"
+#include "memory/tenuredGeneration.hpp"
+
+bool TenuredGeneration::is_in(const void* p) const {
+  return the_space()->is_in(p);
+}
+
+
+WaterMark TenuredGeneration::top_mark() {
+  return the_space()->top_mark();
+}
+
+CompactibleSpace*
+TenuredGeneration::first_compaction_space() const {
+  return the_space();
+}
+
+HeapWord* TenuredGeneration::allocate(size_t word_size,
+                                                 bool is_tlab) {
+  assert(!is_tlab, "TenuredGeneration does not support TLAB allocation");
+  return the_space()->allocate(word_size);
+}
+
+HeapWord* TenuredGeneration::par_allocate(size_t word_size,
+                                                     bool is_tlab) {
+  assert(!is_tlab, "TenuredGeneration does not support TLAB allocation");
+  return the_space()->par_allocate(word_size);
+}
+
+WaterMark TenuredGeneration::bottom_mark() {
+  return the_space()->bottom_mark();
+}
+
+size_t TenuredGeneration::block_size(const HeapWord* addr) const {
+  if (addr < the_space()->top()) return oop(addr)->size();
+  else {
+    assert(addr == the_space()->top(), "non-block head arg to block_size");
+    return the_space()->end() - the_space()->top();
+  }
+}
+
+bool TenuredGeneration::block_is_obj(const HeapWord* addr) const {
+  return addr < the_space()->top();
+}
+
+#endif // SHARE_VM_MEMORY_GENERATION_INLINE_HPP
--- a/src/share/vm/precompiled/precompiled.hpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/precompiled/precompiled.hpp	Mon Dec 01 14:37:25 2014 +0100
@@ -127,7 +127,6 @@
 # include "memory/genOopClosures.hpp"
 # include "memory/genRemSet.hpp"
 # include "memory/generation.hpp"
-# include "memory/generation.inline.hpp"
 # include "memory/heap.hpp"
 # include "memory/iterator.hpp"
 # include "memory/memRegion.hpp"
--- a/src/share/vm/runtime/vmStructs.cpp	Tue Dec 02 09:51:16 2014 +0100
+++ b/src/share/vm/runtime/vmStructs.cpp	Mon Dec 01 14:37:25 2014 +0100
@@ -554,9 +554,9 @@
                                                                                                                                      \
   nonstatic_field(OffsetTableContigSpace,      _offsets,                                      BlockOffsetArray)                      \
                                                                                                                                      \
-  nonstatic_field(OneContigSpaceCardGeneration, _min_heap_delta_bytes,                        size_t)                                \
-  nonstatic_field(OneContigSpaceCardGeneration, _the_space,                                   ContiguousSpace*)                      \
-  nonstatic_field(OneContigSpaceCardGeneration, _last_gc,                                     WaterMark)                             \
+  nonstatic_field(TenuredGeneration,           _min_heap_delta_bytes,                         size_t)                                \
+  nonstatic_field(TenuredGeneration,           _the_space,                                    ContiguousSpace*)                      \
+  nonstatic_field(TenuredGeneration,           _last_gc,                                      WaterMark)                             \
                                                                                                                                      \
                                                                                                                                      \
                                                                                                                                      \
@@ -1481,8 +1481,7 @@
   declare_toplevel_type(Generation)                                       \
            declare_type(DefNewGeneration,             Generation)         \
            declare_type(CardGeneration,               Generation)         \
-           declare_type(OneContigSpaceCardGeneration, CardGeneration)     \
-           declare_type(TenuredGeneration,            OneContigSpaceCardGeneration) \
+           declare_type(TenuredGeneration,            CardGeneration)     \
   declare_toplevel_type(Space)                                            \
   declare_toplevel_type(BitMap)                                           \
            declare_type(CompactibleSpace,             Space)              \
@@ -1534,8 +1533,8 @@
   declare_toplevel_type(HeapWord*)                                        \
   declare_toplevel_type(MemRegion*)                                       \
   declare_toplevel_type(OffsetTableContigSpace*)                          \
-  declare_toplevel_type(OneContigSpaceCardGeneration*)                    \
   declare_toplevel_type(Space*)                                           \
+  declare_toplevel_type(TenuredGeneration*)                               \
   declare_toplevel_type(ThreadLocalAllocBuffer*)                          \
                                                                           \
   /************************/                                              \