jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1OopClosures.hpp@37552638d24a

7172388: G1: _total_full_collections should not be incremented for concurrent cycles
Reviewed-by: azeemj, jmasa

     1 /*

     2  * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP

    28 class HeapRegion;

    29 class G1CollectedHeap;

    30 class G1RemSet;

    31 class ConcurrentMark;

    32 class DirtyCardToOopClosure;

    33 class CMBitMap;

    34 class CMMarkStack;

    35 class G1ParScanThreadState;

    36 class CMTask;

    37 class ReferenceProcessor;

    39 // A class that scans oops in a given heap region (much as OopsInGenClosure

    40 // scans oops in a generation.)

    41 class OopsInHeapRegionClosure: public OopsInGenClosure {

    42 protected:

    43   HeapRegion* _from;

    44 public:

    45   void set_region(HeapRegion* from) { _from = from; }

    46 };

    48 class G1ParClosureSuper : public OopsInHeapRegionClosure {

    49 protected:

    50   G1CollectedHeap* _g1;

    51   G1RemSet* _g1_rem;

    52   ConcurrentMark* _cm;

    53   G1ParScanThreadState* _par_scan_state;

    54   uint _worker_id;

    55   bool _during_initial_mark;

    56   bool _mark_in_progress;

    57 public:

    58   G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state);

    59   bool apply_to_weak_ref_discovered_field() { return true; }

    60 };

    62 class G1ParPushHeapRSClosure : public G1ParClosureSuper {

    63 public:

    64   G1ParPushHeapRSClosure(G1CollectedHeap* g1,

    65                          G1ParScanThreadState* par_scan_state):

    66     G1ParClosureSuper(g1, par_scan_state) { }

    68   template <class T> void do_oop_nv(T* p);

    69   virtual void do_oop(oop* p)          { do_oop_nv(p); }

    70   virtual void do_oop(narrowOop* p)    { do_oop_nv(p); }

    71 };

    73 class G1ParScanClosure : public G1ParClosureSuper {

    74 public:

    75   G1ParScanClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, ReferenceProcessor* rp) :

    76     G1ParClosureSuper(g1, par_scan_state)

    77   {

    78     assert(_ref_processor == NULL, "sanity");

    79     _ref_processor = rp;

    80   }

    82   template <class T> void do_oop_nv(T* p);

    83   virtual void do_oop(oop* p)          { do_oop_nv(p); }

    84   virtual void do_oop(narrowOop* p)    { do_oop_nv(p); }

    85 };

    87 #define G1_PARTIAL_ARRAY_MASK 0x2

    89 template <class T> inline bool has_partial_array_mask(T* ref) {

    90   return ((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) == G1_PARTIAL_ARRAY_MASK;

    91 }

    93 template <class T> inline T* set_partial_array_mask(T obj) {

    94   assert(((uintptr_t)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!");

    95   return (T*) ((uintptr_t)obj | G1_PARTIAL_ARRAY_MASK);

    96 }

    98 template <class T> inline oop clear_partial_array_mask(T* ref) {

    99   return oop((intptr_t)ref & ~G1_PARTIAL_ARRAY_MASK);

   100 }

   102 class G1ParScanPartialArrayClosure : public G1ParClosureSuper {

   103   G1ParScanClosure _scanner;

   105 public:

   106   G1ParScanPartialArrayClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, ReferenceProcessor* rp) :

   107     G1ParClosureSuper(g1, par_scan_state), _scanner(g1, par_scan_state, rp)

   108   {

   109     assert(_ref_processor == NULL, "sanity");

   110   }

   112   G1ParScanClosure* scanner() {

   113     return &_scanner;

   114   }

   116   template <class T> void do_oop_nv(T* p);

   117   virtual void do_oop(oop* p)       { do_oop_nv(p); }

   118   virtual void do_oop(narrowOop* p) { do_oop_nv(p); }

   119 };

   121 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object>

   122 class G1ParCopyClosure : public G1ParClosureSuper {

   123   G1ParScanClosure _scanner;

   124   template <class T> void do_oop_work(T* p);

   126 protected:

   127   // Mark the object if it's not already marked. This is used to mark

   128   // objects pointed to by roots that are guaranteed not to move

   129   // during the GC (i.e., non-CSet objects). It is MT-safe.

   130   void mark_object(oop obj);

   132   // Mark the object if it's not already marked. This is used to mark

   133   // objects pointed to by roots that have been forwarded during a

   134   // GC. It is MT-safe.

   135   void mark_forwarded_object(oop from_obj, oop to_obj);

   137   oop copy_to_survivor_space(oop obj);

   139 public:

   140   G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state,

   141                    ReferenceProcessor* rp) :

   142       _scanner(g1, par_scan_state, rp),

   143       G1ParClosureSuper(g1, par_scan_state) {

   144     assert(_ref_processor == NULL, "sanity");

   145   }

   147   G1ParScanClosure* scanner() { return &_scanner; }

   149   template <class T> void do_oop_nv(T* p) {

   150     do_oop_work(p);

   151   }

   152   virtual void do_oop(oop* p)       { do_oop_nv(p); }

   153   virtual void do_oop(narrowOop* p) { do_oop_nv(p); }

   154 };

   156 typedef G1ParCopyClosure<false, G1BarrierNone, false> G1ParScanExtRootClosure;

   157 typedef G1ParCopyClosure<true,  G1BarrierNone, false> G1ParScanPermClosure;

   159 typedef G1ParCopyClosure<false, G1BarrierNone, true> G1ParScanAndMarkExtRootClosure;

   160 typedef G1ParCopyClosure<true,  G1BarrierNone, true> G1ParScanAndMarkPermClosure;

   162 // The following closure types are no longer used but are retained

   163 // for historical reasons:

   164 // typedef G1ParCopyClosure<false, G1BarrierRS,   false> G1ParScanHeapRSClosure;

   165 // typedef G1ParCopyClosure<false, G1BarrierRS,   true> G1ParScanAndMarkHeapRSClosure;

   167 // The following closure type is defined in g1_specialized_oop_closures.hpp:

   168 //

   169 // typedef G1ParCopyClosure<false, G1BarrierEvac, false> G1ParScanHeapEvacClosure;

   171 // We use a separate closure to handle references during evacuation

   172 // failure processing.

   173 // We could have used another instance of G1ParScanHeapEvacClosure

   174 // (since that closure no longer assumes that the references it

   175 // handles point into the collection set).

   177 typedef G1ParCopyClosure<false, G1BarrierEvac, false> G1ParScanHeapEvacFailureClosure;

   179 class FilterIntoCSClosure: public OopClosure {

   180   G1CollectedHeap* _g1;

   181   OopClosure* _oc;

   182   DirtyCardToOopClosure* _dcto_cl;

   183 public:

   184   FilterIntoCSClosure(  DirtyCardToOopClosure* dcto_cl,

   185                         G1CollectedHeap* g1,

   186                         OopClosure* oc) :

   187     _dcto_cl(dcto_cl), _g1(g1), _oc(oc) { }

   189   template <class T> void do_oop_nv(T* p);

   190   virtual void do_oop(oop* p)        { do_oop_nv(p); }

   191   virtual void do_oop(narrowOop* p)  { do_oop_nv(p); }

   192   bool apply_to_weak_ref_discovered_field() { return true; }

   193   bool do_header() { return false; }

   194 };

   196 class FilterOutOfRegionClosure: public OopClosure {

   197   HeapWord* _r_bottom;

   198   HeapWord* _r_end;

   199   OopClosure* _oc;

   200   int _out_of_region;

   201 public:

   202   FilterOutOfRegionClosure(HeapRegion* r, OopClosure* oc);

   203   template <class T> void do_oop_nv(T* p);

   204   virtual void do_oop(oop* p) { do_oop_nv(p); }

   205   virtual void do_oop(narrowOop* p) { do_oop_nv(p); }

   206   bool apply_to_weak_ref_discovered_field() { return true; }

   207   bool do_header() { return false; }

   208   int out_of_region() { return _out_of_region; }

   209 };

   211 // Closure for iterating over object fields during concurrent marking

   212 class G1CMOopClosure : public OopClosure {

   213 private:

   214   G1CollectedHeap*   _g1h;

   215   ConcurrentMark*    _cm;

   216   CMTask*            _task;

   217 public:

   218   G1CMOopClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, CMTask* task);

   219   template <class T> void do_oop_nv(T* p);

   220   virtual void do_oop(      oop* p) { do_oop_nv(p); }

   221   virtual void do_oop(narrowOop* p) { do_oop_nv(p); }

   222 };

   224 // Closure to scan the root regions during concurrent marking

   225 class G1RootRegionScanClosure : public OopClosure {

   226 private:

   227   G1CollectedHeap* _g1h;

   228   ConcurrentMark*  _cm;

   229   uint _worker_id;

   230 public:

   231   G1RootRegionScanClosure(G1CollectedHeap* g1h, ConcurrentMark* cm,

   232                           uint worker_id) :

   233     _g1h(g1h), _cm(cm), _worker_id(worker_id) { }

   234   template <class T> void do_oop_nv(T* p);

   235   virtual void do_oop(      oop* p) { do_oop_nv(p); }

   236   virtual void do_oop(narrowOop* p) { do_oop_nv(p); }

   237 };

   239 // Closure that applies the given two closures in sequence.

   240 // Used by the RSet refinement code (when updating RSets

   241 // during an evacuation pause) to record cards containing

   242 // pointers into the collection set.

   244 class G1Mux2Closure : public OopClosure {

   245   OopClosure* _c1;

   246   OopClosure* _c2;

   247 public:

   248   G1Mux2Closure(OopClosure *c1, OopClosure *c2);

   249   template <class T> void do_oop_nv(T* p);

   250   virtual void do_oop(oop* p)        { do_oop_nv(p); }

   251   virtual void do_oop(narrowOop* p)  { do_oop_nv(p); }

   252 };

   254 // A closure that returns true if it is actually applied

   255 // to a reference

   257 class G1TriggerClosure : public OopClosure {

   258   bool _triggered;

   259 public:

   260   G1TriggerClosure();

   261   bool triggered() const { return _triggered; }

   262   template <class T> void do_oop_nv(T* p);

   263   virtual void do_oop(oop* p)        { do_oop_nv(p); }

   264   virtual void do_oop(narrowOop* p)  { do_oop_nv(p); }

   265 };

   267 // A closure which uses a triggering closure to determine

   268 // whether to apply an oop closure.

   270 class G1InvokeIfNotTriggeredClosure: public OopClosure {

   271   G1TriggerClosure* _trigger_cl;

   272   OopClosure* _oop_cl;

   273 public:

   274   G1InvokeIfNotTriggeredClosure(G1TriggerClosure* t, OopClosure* oc);

   275   template <class T> void do_oop_nv(T* p);

   276   virtual void do_oop(oop* p)        { do_oop_nv(p); }

   277   virtual void do_oop(narrowOop* p)  { do_oop_nv(p); }

   278 };

   280 class G1UpdateRSOrPushRefOopClosure: public OopClosure {

   281   G1CollectedHeap* _g1;

   282   G1RemSet* _g1_rem_set;

   283   HeapRegion* _from;

   284   OopsInHeapRegionClosure* _push_ref_cl;

   285   bool _record_refs_into_cset;

   286   int _worker_i;

   288 public:

   289   G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h,

   290                                 G1RemSet* rs,

   291                                 OopsInHeapRegionClosure* push_ref_cl,

   292                                 bool record_refs_into_cset,

   293                                 int worker_i = 0);

   295   void set_from(HeapRegion* from) {

   296     assert(from != NULL, "from region must be non-NULL");

   297     _from = from;

   298   }

   300   bool self_forwarded(oop obj) {

   301     bool result = (obj->is_forwarded() && (obj->forwardee()== obj));

   302     return result;

   303   }

   305   bool apply_to_weak_ref_discovered_field() { return true; }

   307   template <class T> void do_oop_nv(T* p);

   308   virtual void do_oop(narrowOop* p) { do_oop_nv(p); }

   309   virtual void do_oop(oop* p)       { do_oop_nv(p); }

   310 };

   312 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/g1/g1OopClosures.hpp@37552638d24a

src/share/vm/gc_implementation/g1/g1OopClosures.hpp