8025852: Remove unnecessary setters in collector policy classes
Summary: Use instance variables directly within the collector policy classes and remove unused setters.
Reviewed-by: tschatzl, jcoomes
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP
#define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP
class HeapRegion;
class G1CollectedHeap;
class G1RemSet;
class ConcurrentMark;
class DirtyCardToOopClosure;
class CMBitMap;
class CMMarkStack;
class G1ParScanThreadState;
class CMTask;
class ReferenceProcessor;
// A class that scans oops in a given heap region (much as OopsInGenClosure
// scans oops in a generation.)
class OopsInHeapRegionClosure: public OopsInGenClosure {
protected:
HeapRegion* _from;
public:
void set_region(HeapRegion* from) { _from = from; }
};
class G1ParClosureSuper : public OopsInHeapRegionClosure {
protected:
G1CollectedHeap* _g1;
G1RemSet* _g1_rem;
ConcurrentMark* _cm;
G1ParScanThreadState* _par_scan_state;
uint _worker_id;
bool _during_initial_mark;
bool _mark_in_progress;
public:
G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state);
bool apply_to_weak_ref_discovered_field() { return true; }
};
class G1ParPushHeapRSClosure : public G1ParClosureSuper {
public:
G1ParPushHeapRSClosure(G1CollectedHeap* g1,
G1ParScanThreadState* par_scan_state):
G1ParClosureSuper(g1, par_scan_state) { }
template <class T> void do_oop_nv(T* p);
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
class G1ParScanClosure : public G1ParClosureSuper {
public:
G1ParScanClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, ReferenceProcessor* rp) :
G1ParClosureSuper(g1, par_scan_state)
{
assert(_ref_processor == NULL, "sanity");
_ref_processor = rp;
}
template <class T> void do_oop_nv(T* p);
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
#define G1_PARTIAL_ARRAY_MASK 0x2
template <class T> inline bool has_partial_array_mask(T* ref) {
return ((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) == G1_PARTIAL_ARRAY_MASK;
}
template <class T> inline T* set_partial_array_mask(T obj) {
assert(((uintptr_t)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!");
return (T*) ((uintptr_t)obj | G1_PARTIAL_ARRAY_MASK);
}
template <class T> inline oop clear_partial_array_mask(T* ref) {
return oop((intptr_t)ref & ~G1_PARTIAL_ARRAY_MASK);
}
class G1ParScanPartialArrayClosure : public G1ParClosureSuper {
G1ParScanClosure _scanner;
public:
G1ParScanPartialArrayClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, ReferenceProcessor* rp) :
G1ParClosureSuper(g1, par_scan_state), _scanner(g1, par_scan_state, rp)
{
assert(_ref_processor == NULL, "sanity");
}
G1ParScanClosure* scanner() {
return &_scanner;
}
template <class T> void do_oop_nv(T* p);
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
// Add back base class for metadata
class G1ParCopyHelper : public G1ParClosureSuper {
Klass* _scanned_klass;
public:
G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) :
_scanned_klass(NULL),
G1ParClosureSuper(g1, par_scan_state) {}
void set_scanned_klass(Klass* k) { _scanned_klass = k; }
template <class T> void do_klass_barrier(T* p, oop new_obj);
};
template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object>
class G1ParCopyClosure : public G1ParCopyHelper {
G1ParScanClosure _scanner;
template <class T> void do_oop_work(T* p);
protected:
// Mark the object if it's not already marked. This is used to mark
// objects pointed to by roots that are guaranteed not to move
// during the GC (i.e., non-CSet objects). It is MT-safe.
void mark_object(oop obj);
// Mark the object if it's not already marked. This is used to mark
// objects pointed to by roots that have been forwarded during a
// GC. It is MT-safe.
void mark_forwarded_object(oop from_obj, oop to_obj);
oop copy_to_survivor_space(oop obj);
public:
G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state,
ReferenceProcessor* rp) :
_scanner(g1, par_scan_state, rp),
G1ParCopyHelper(g1, par_scan_state) {
assert(_ref_processor == NULL, "sanity");
}
G1ParScanClosure* scanner() { return &_scanner; }
template <class T> void do_oop_nv(T* p) {
do_oop_work(p);
}
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
typedef G1ParCopyClosure<false, G1BarrierNone, false> G1ParScanExtRootClosure;
typedef G1ParCopyClosure<false, G1BarrierKlass, false> G1ParScanMetadataClosure;
typedef G1ParCopyClosure<false, G1BarrierNone, true> G1ParScanAndMarkExtRootClosure;
typedef G1ParCopyClosure<true, G1BarrierNone, true> G1ParScanAndMarkClosure;
typedef G1ParCopyClosure<false, G1BarrierKlass, true> G1ParScanAndMarkMetadataClosure;
// The following closure types are no longer used but are retained
// for historical reasons:
// typedef G1ParCopyClosure<false, G1BarrierRS, false> G1ParScanHeapRSClosure;
// typedef G1ParCopyClosure<false, G1BarrierRS, true> G1ParScanAndMarkHeapRSClosure;
// The following closure type is defined in g1_specialized_oop_closures.hpp:
//
// typedef G1ParCopyClosure<false, G1BarrierEvac, false> G1ParScanHeapEvacClosure;
// We use a separate closure to handle references during evacuation
// failure processing.
// We could have used another instance of G1ParScanHeapEvacClosure
// (since that closure no longer assumes that the references it
// handles point into the collection set).
typedef G1ParCopyClosure<false, G1BarrierEvac, false> G1ParScanHeapEvacFailureClosure;
class FilterIntoCSClosure: public ExtendedOopClosure {
G1CollectedHeap* _g1;
OopClosure* _oc;
DirtyCardToOopClosure* _dcto_cl;
public:
FilterIntoCSClosure( DirtyCardToOopClosure* dcto_cl,
G1CollectedHeap* g1,
OopClosure* oc) :
_dcto_cl(dcto_cl), _g1(g1), _oc(oc) { }
template <class T> void do_oop_nv(T* p);
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
bool apply_to_weak_ref_discovered_field() { return true; }
};
class FilterOutOfRegionClosure: public ExtendedOopClosure {
HeapWord* _r_bottom;
HeapWord* _r_end;
OopClosure* _oc;
public:
FilterOutOfRegionClosure(HeapRegion* r, OopClosure* oc);
template <class T> void do_oop_nv(T* p);
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
bool apply_to_weak_ref_discovered_field() { return true; }
};
// Closure for iterating over object fields during concurrent marking
class G1CMOopClosure : public ExtendedOopClosure {
private:
G1CollectedHeap* _g1h;
ConcurrentMark* _cm;
CMTask* _task;
public:
G1CMOopClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, CMTask* task);
template <class T> void do_oop_nv(T* p);
virtual void do_oop( oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
// Closure to scan the root regions during concurrent marking
class G1RootRegionScanClosure : public ExtendedOopClosure {
private:
G1CollectedHeap* _g1h;
ConcurrentMark* _cm;
uint _worker_id;
public:
G1RootRegionScanClosure(G1CollectedHeap* g1h, ConcurrentMark* cm,
uint worker_id) :
_g1h(g1h), _cm(cm), _worker_id(worker_id) { }
template <class T> void do_oop_nv(T* p);
virtual void do_oop( oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
// Closure that applies the given two closures in sequence.
// Used by the RSet refinement code (when updating RSets
// during an evacuation pause) to record cards containing
// pointers into the collection set.
class G1Mux2Closure : public ExtendedOopClosure {
OopClosure* _c1;
OopClosure* _c2;
public:
G1Mux2Closure(OopClosure *c1, OopClosure *c2);
template <class T> void do_oop_nv(T* p);
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
// A closure that returns true if it is actually applied
// to a reference
class G1TriggerClosure : public ExtendedOopClosure {
bool _triggered;
public:
G1TriggerClosure();
bool triggered() const { return _triggered; }
template <class T> void do_oop_nv(T* p);
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
// A closure which uses a triggering closure to determine
// whether to apply an oop closure.
class G1InvokeIfNotTriggeredClosure: public ExtendedOopClosure {
G1TriggerClosure* _trigger_cl;
OopClosure* _oop_cl;
public:
G1InvokeIfNotTriggeredClosure(G1TriggerClosure* t, OopClosure* oc);
template <class T> void do_oop_nv(T* p);
virtual void do_oop(oop* p) { do_oop_nv(p); }
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
};
class G1UpdateRSOrPushRefOopClosure: public ExtendedOopClosure {
G1CollectedHeap* _g1;
G1RemSet* _g1_rem_set;
HeapRegion* _from;
OopsInHeapRegionClosure* _push_ref_cl;
bool _record_refs_into_cset;
int _worker_i;
public:
G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h,
G1RemSet* rs,
OopsInHeapRegionClosure* push_ref_cl,
bool record_refs_into_cset,
int worker_i = 0);
void set_from(HeapRegion* from) {
assert(from != NULL, "from region must be non-NULL");
_from = from;
}
bool self_forwarded(oop obj) {
bool result = (obj->is_forwarded() && (obj->forwardee()== obj));
return result;
}
bool apply_to_weak_ref_discovered_field() { return true; }
template <class T> void do_oop_nv(T* p);
virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
virtual void do_oop(oop* p) { do_oop_nv(p); }
};
#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP