8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
Reviewed-by: pliden, stefank, eosterlund, ehelin, sjohanss, rbackman, coleenp, ihse, jgeorge, lmesnik, rkennke
Contributed-by: per.liden@oracle.com, stefan.karlsson@oracle.com, erik.osterlund@oracle.com, mikael.gerdin@oracle.com, kim.barrett@oracle.com, nils.eliasson@oracle.com, rickard.backman@oracle.com, rwestrel@redhat.com, coleen.phillimore@oracle.com, robbin.ehn@oracle.com, gerard.ziemski@oracle.com, hugh.wilkinson@intel.com, sandhya.viswanathan@intel.com, bill.npo.wheeler@intel.com, vinay.k.awasthi@intel.com, yasuenag@gmail.com
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* 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).
*
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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_GC_Z_ZOOPCLOSURES_HPP
#define SHARE_GC_Z_ZOOPCLOSURES_HPP
#include "memory/iterator.hpp"
class ZLoadBarrierOopClosure : public ExtendedOopClosure {
public:
void do_oop_nv(oop* p);
void do_oop_nv(narrowOop* p);
virtual void do_oop(oop* p);
virtual void do_oop(narrowOop* p);
#ifdef ASSERT
virtual bool should_verify_oops() {
return false;
}
#endif
};
class ZMarkRootOopClosure : public OopClosure {
public:
virtual void do_oop(oop* p);
virtual void do_oop(narrowOop* p);
};
class ZRelocateRootOopClosure : public OopClosure {
public:
virtual void do_oop(oop* p);
virtual void do_oop(narrowOop* p);
};
template <bool finalizable>
class ZMarkBarrierOopClosure : public ExtendedOopClosure {
public:
ZMarkBarrierOopClosure();
void do_oop_nv(oop* p);
void do_oop_nv(narrowOop* p);
virtual void do_oop(oop* p);
virtual void do_oop(narrowOop* p);
#ifdef ASSERT
virtual bool should_verify_oops() {
return false;
}
#endif
};
class ZPhantomIsAliveObjectClosure : public BoolObjectClosure {
public:
virtual bool do_object_b(oop o);
};
class ZPhantomKeepAliveOopClosure : public OopClosure {
public:
virtual void do_oop(oop* p);
virtual void do_oop(narrowOop* p);
};
class ZPhantomCleanOopClosure : public OopClosure {
public:
virtual void do_oop(oop* p);
virtual void do_oop(narrowOop* p);
};
class ZVerifyHeapOopClosure : public ExtendedOopClosure {
private:
const oop _base;
public:
ZVerifyHeapOopClosure(oop base);
virtual void do_oop(oop* p);
virtual void do_oop(narrowOop* p);
#ifdef ASSERT
// Verification handled by the closure itself.
virtual bool should_verify_oops() {
return false;
}
#endif
};
class ZVerifyRootOopClosure : public OopClosure {
public:
virtual void do_oop(oop* p);
virtual void do_oop(narrowOop* p);
};
class ZVerifyObjectClosure : public ObjectClosure {
public:
virtual void do_object(oop o);
};
#endif // SHARE_GC_Z_ZOOPCLOSURES_HPP