jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1OopClosures.hpp@1772223a25a2

8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
Reviewed-by: brutisso, mgerdin

     1 /*

     2  * Copyright (c) 2001, 2014, 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

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    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

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    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 ExtendedOopClosure {

    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   G1ParScanThreadState* _par_scan_state;

    52   uint _worker_id;

    53 public:

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

    55   bool apply_to_weak_ref_discovered_field() { return true; }

    56 };

    58 class G1ParPushHeapRSClosure : public G1ParClosureSuper {

    59 public:

    60   G1ParPushHeapRSClosure(G1CollectedHeap* g1,

    61                          G1ParScanThreadState* par_scan_state):

    62     G1ParClosureSuper(g1, par_scan_state) { }

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

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

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

    67 };

    69 class G1ParScanClosure : public G1ParClosureSuper {

    70 public:

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

    72     G1ParClosureSuper(g1, par_scan_state)

    73   {

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

    75     _ref_processor = rp;

    76   }

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

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

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

    81 };

    83 // Add back base class for metadata

    84 class G1ParCopyHelper : public G1ParClosureSuper {

    85 protected:

    86   Klass* _scanned_klass;

    87   ConcurrentMark* _cm;

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

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

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

    92   void mark_object(oop obj);

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

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

    96   // GC. It is MT-safe.

    97   void mark_forwarded_object(oop from_obj, oop to_obj);

    98  public:

    99   G1ParCopyHelper(G1CollectedHeap* g1,  G1ParScanThreadState* par_scan_state);

   101   void set_scanned_klass(Klass* k) { _scanned_klass = k; }

   102   template <class T> void do_klass_barrier(T* p, oop new_obj);

   103 };

   105 template <G1Barrier barrier, bool do_mark_object>

   106 class G1ParCopyClosure : public G1ParCopyHelper {

   107 private:

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

   110 public:

   111   G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state,

   112                    ReferenceProcessor* rp) :

   113       G1ParCopyHelper(g1, par_scan_state) {

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

   115   }

   117   template <class T> void do_oop_nv(T* p) { do_oop_work(p); }

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

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

   120 };

   122 typedef G1ParCopyClosure<G1BarrierNone, false> G1ParScanExtRootClosure;

   123 typedef G1ParCopyClosure<G1BarrierKlass, false> G1ParScanMetadataClosure;

   126 typedef G1ParCopyClosure<G1BarrierNone, true> G1ParScanAndMarkExtRootClosure;

   127 typedef G1ParCopyClosure<G1BarrierKlass, true> G1ParScanAndMarkMetadataClosure;

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

   130 // failure processing.

   132 typedef G1ParCopyClosure<G1BarrierEvac, false> G1ParScanHeapEvacFailureClosure;

   134 class FilterIntoCSClosure: public ExtendedOopClosure {

   135   G1CollectedHeap* _g1;

   136   OopClosure* _oc;

   137   DirtyCardToOopClosure* _dcto_cl;

   138 public:

   139   FilterIntoCSClosure(  DirtyCardToOopClosure* dcto_cl,

   140                         G1CollectedHeap* g1,

   141                         OopClosure* oc) :

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

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

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

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

   147   bool apply_to_weak_ref_discovered_field() { return true; }

   148 };

   150 class FilterOutOfRegionClosure: public ExtendedOopClosure {

   151   HeapWord* _r_bottom;

   152   HeapWord* _r_end;

   153   OopClosure* _oc;

   154 public:

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

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

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

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

   159   bool apply_to_weak_ref_discovered_field() { return true; }

   160 };

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

   163 class G1CMOopClosure : public ExtendedOopClosure {

   164 private:

   165   G1CollectedHeap*   _g1h;

   166   ConcurrentMark*    _cm;

   167   CMTask*            _task;

   168 public:

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

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

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

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

   173 };

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

   176 class G1RootRegionScanClosure : public ExtendedOopClosure {

   177 private:

   178   G1CollectedHeap* _g1h;

   179   ConcurrentMark*  _cm;

   180   uint _worker_id;

   181 public:

   182   G1RootRegionScanClosure(G1CollectedHeap* g1h, ConcurrentMark* cm,

   183                           uint worker_id) :

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

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

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

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

   188 };

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

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

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

   193 // pointers into the collection set.

   195 class G1Mux2Closure : public ExtendedOopClosure {

   196   OopClosure* _c1;

   197   OopClosure* _c2;

   198 public:

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

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

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

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

   203 };

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

   206 // to a reference

   208 class G1TriggerClosure : public ExtendedOopClosure {

   209   bool _triggered;

   210 public:

   211   G1TriggerClosure();

   212   bool triggered() const { return _triggered; }

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

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

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

   216 };

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

   219 // whether to apply an oop closure.

   221 class G1InvokeIfNotTriggeredClosure: public ExtendedOopClosure {

   222   G1TriggerClosure* _trigger_cl;

   223   OopClosure* _oop_cl;

   224 public:

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

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

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

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

   229 };

   231 class G1UpdateRSOrPushRefOopClosure: public ExtendedOopClosure {

   232   G1CollectedHeap* _g1;

   233   G1RemSet* _g1_rem_set;

   234   HeapRegion* _from;

   235   OopsInHeapRegionClosure* _push_ref_cl;

   236   bool _record_refs_into_cset;

   237   uint _worker_i;

   239 public:

   240   G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h,

   241                                 G1RemSet* rs,

   242                                 OopsInHeapRegionClosure* push_ref_cl,

   243                                 bool record_refs_into_cset,

   244                                 uint worker_i = 0);

   246   void set_from(HeapRegion* from) {

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

   248     _from = from;

   249   }

   251   bool self_forwarded(oop obj) {

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

   253     return result;

   254   }

   256   bool apply_to_weak_ref_discovered_field() { return true; }

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

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

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

   261 };

   263 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP

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

src/share/vm/gc_implementation/g1/g1OopClosures.hpp@1772223a25a2

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