jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1OopClosures.hpp@190899198332

7195622: CheckUnhandledOops has limited usefulness now
Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com

     1 /*

     2  * Copyright (c) 2001, 2013, 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)(void *)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!");

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

    96 }

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

    99   return cast_to_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 // Add back base class for metadata

   122 class G1ParCopyHelper : public G1ParClosureSuper {

   123   Klass* _scanned_klass;

   125  public:

   126   G1ParCopyHelper(G1CollectedHeap* g1,  G1ParScanThreadState* par_scan_state) :

   127       _scanned_klass(NULL),

   128       G1ParClosureSuper(g1, par_scan_state) {}

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

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

   132 };

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

   135 class G1ParCopyClosure : public G1ParCopyHelper {

   136   G1ParScanClosure _scanner;

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

   139 protected:

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

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

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

   143   void mark_object(oop obj);

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

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

   147   // GC. It is MT-safe.

   148   void mark_forwarded_object(oop from_obj, oop to_obj);

   150   oop copy_to_survivor_space(oop obj);

   152 public:

   153   G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state,

   154                    ReferenceProcessor* rp) :

   155       _scanner(g1, par_scan_state, rp),

   156       G1ParCopyHelper(g1, par_scan_state) {

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

   158   }

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

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

   163     do_oop_work(p);

   164   }

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

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

   167 };

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

   170 typedef G1ParCopyClosure<false, G1BarrierKlass, false> G1ParScanMetadataClosure;

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

   174 typedef G1ParCopyClosure<true,  G1BarrierNone, true> G1ParScanAndMarkClosure;

   175 typedef G1ParCopyClosure<false, G1BarrierKlass, true> G1ParScanAndMarkMetadataClosure;

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

   178 // for historical reasons:

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

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

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

   183 //

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

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

   187 // failure processing.

   188 // We could have used another instance of G1ParScanHeapEvacClosure

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

   190 // handles point into the collection set).

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

   194 class FilterIntoCSClosure: public ExtendedOopClosure {

   195   G1CollectedHeap* _g1;

   196   OopClosure* _oc;

   197   DirtyCardToOopClosure* _dcto_cl;

   198 public:

   199   FilterIntoCSClosure(  DirtyCardToOopClosure* dcto_cl,

   200                         G1CollectedHeap* g1,

   201                         OopClosure* oc) :

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

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

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

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

   207   bool apply_to_weak_ref_discovered_field() { return true; }

   208 };

   210 class FilterOutOfRegionClosure: public ExtendedOopClosure {

   211   HeapWord* _r_bottom;

   212   HeapWord* _r_end;

   213   OopClosure* _oc;

   214 public:

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

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

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

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

   219   bool apply_to_weak_ref_discovered_field() { return true; }

   220 };

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

   223 class G1CMOopClosure : public ExtendedOopClosure {

   224 private:

   225   G1CollectedHeap*   _g1h;

   226   ConcurrentMark*    _cm;

   227   CMTask*            _task;

   228 public:

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

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

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

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

   233 };

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

   236 class G1RootRegionScanClosure : public ExtendedOopClosure {

   237 private:

   238   G1CollectedHeap* _g1h;

   239   ConcurrentMark*  _cm;

   240   uint _worker_id;

   241 public:

   242   G1RootRegionScanClosure(G1CollectedHeap* g1h, ConcurrentMark* cm,

   243                           uint worker_id) :

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

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

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

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

   248 };

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

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

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

   253 // pointers into the collection set.

   255 class G1Mux2Closure : public ExtendedOopClosure {

   256   OopClosure* _c1;

   257   OopClosure* _c2;

   258 public:

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

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

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

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

   263 };

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

   266 // to a reference

   268 class G1TriggerClosure : public ExtendedOopClosure {

   269   bool _triggered;

   270 public:

   271   G1TriggerClosure();

   272   bool triggered() const { return _triggered; }

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

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

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

   276 };

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

   279 // whether to apply an oop closure.

   281 class G1InvokeIfNotTriggeredClosure: public ExtendedOopClosure {

   282   G1TriggerClosure* _trigger_cl;

   283   OopClosure* _oop_cl;

   284 public:

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

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

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

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

   289 };

   291 class G1UpdateRSOrPushRefOopClosure: public ExtendedOopClosure {

   292   G1CollectedHeap* _g1;

   293   G1RemSet* _g1_rem_set;

   294   HeapRegion* _from;

   295   OopsInHeapRegionClosure* _push_ref_cl;

   296   bool _record_refs_into_cset;

   297   int _worker_i;

   299 public:

   300   G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h,

   301                                 G1RemSet* rs,

   302                                 OopsInHeapRegionClosure* push_ref_cl,

   303                                 bool record_refs_into_cset,

   304                                 int worker_i = 0);

   306   void set_from(HeapRegion* from) {

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

   308     _from = from;

   309   }

   311   bool self_forwarded(oop obj) {

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

   313     return result;

   314   }

   316   bool apply_to_weak_ref_discovered_field() { return true; }

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

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

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

   321 };

   323 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP

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

src/share/vm/gc_implementation/g1/g1OopClosures.hpp@190899198332

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