aoqi@0: /*
aoqi@0:  * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP
aoqi@0: #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP
aoqi@0: 
aoqi@0: #include "gc_implementation/g1/concurrentMark.inline.hpp"
aoqi@0: #include "gc_implementation/g1/g1CollectedHeap.hpp"
aoqi@0: #include "gc_implementation/g1/g1OopClosures.hpp"
tschatzl@6937: #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp"
aoqi@0: #include "gc_implementation/g1/g1RemSet.hpp"
aoqi@0: #include "gc_implementation/g1/g1RemSet.inline.hpp"
aoqi@0: #include "gc_implementation/g1/heapRegionRemSet.hpp"
stefank@6992: #include "memory/iterator.inline.hpp"
goetz@6912: #include "runtime/prefetch.inline.hpp"
aoqi@0: 
aoqi@0: /*
aoqi@0:  * This really ought to be an inline function, but apparently the C++
aoqi@0:  * compiler sometimes sees fit to ignore inline declarations.  Sigh.
aoqi@0:  */
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void FilterIntoCSClosure::do_oop_nv(T* p) {
aoqi@0:   T heap_oop = oopDesc::load_heap_oop(p);
aoqi@0:   if (!oopDesc::is_null(heap_oop) &&
tschatzl@7010:       _g1->is_in_cset_or_humongous(oopDesc::decode_heap_oop_not_null(heap_oop))) {
aoqi@0:     _oc->do_oop(p);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void FilterOutOfRegionClosure::do_oop_nv(T* p) {
aoqi@0:   T heap_oop = oopDesc::load_heap_oop(p);
aoqi@0:   if (!oopDesc::is_null(heap_oop)) {
aoqi@0:     HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop);
aoqi@0:     if (obj_hw < _r_bottom || obj_hw >= _r_end) {
aoqi@0:       _oc->do_oop(p);
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // This closure is applied to the fields of the objects that have just been copied.
aoqi@0: template <class T>
aoqi@0: inline void G1ParScanClosure::do_oop_nv(T* p) {
aoqi@0:   T heap_oop = oopDesc::load_heap_oop(p);
aoqi@0: 
aoqi@0:   if (!oopDesc::is_null(heap_oop)) {
aoqi@0:     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
tschatzl@7010:     G1CollectedHeap::in_cset_state_t state = _g1->in_cset_state(obj);
tschatzl@7010:     if (state == G1CollectedHeap::InCSet) {
aoqi@0:       // We're not going to even bother checking whether the object is
aoqi@0:       // already forwarded or not, as this usually causes an immediate
aoqi@0:       // stall. We'll try to prefetch the object (for write, given that
aoqi@0:       // we might need to install the forwarding reference) and we'll
aoqi@0:       // get back to it when pop it from the queue
aoqi@0:       Prefetch::write(obj->mark_addr(), 0);
aoqi@0:       Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
aoqi@0: 
aoqi@0:       // slightly paranoid test; I'm trying to catch potential
aoqi@0:       // problems before we go into push_on_queue to know where the
aoqi@0:       // problem is coming from
aoqi@0:       assert((obj == oopDesc::load_decode_heap_oop(p)) ||
aoqi@0:              (obj->is_forwarded() &&
aoqi@0:                  obj->forwardee() == oopDesc::load_decode_heap_oop(p)),
aoqi@0:              "p should still be pointing to obj or to its forwardee");
aoqi@0: 
aoqi@0:       _par_scan_state->push_on_queue(p);
aoqi@0:     } else {
tschatzl@7010:       if (state == G1CollectedHeap::IsHumongous) {
tschatzl@7010:         _g1->set_humongous_is_live(obj);
tschatzl@7010:       }
aoqi@0:       _par_scan_state->update_rs(_from, p, _worker_id);
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void G1ParPushHeapRSClosure::do_oop_nv(T* p) {
aoqi@0:   T heap_oop = oopDesc::load_heap_oop(p);
aoqi@0: 
aoqi@0:   if (!oopDesc::is_null(heap_oop)) {
aoqi@0:     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
tschatzl@7010:     if (_g1->is_in_cset_or_humongous(obj)) {
aoqi@0:       Prefetch::write(obj->mark_addr(), 0);
aoqi@0:       Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
aoqi@0: 
aoqi@0:       // Place on the references queue
aoqi@0:       _par_scan_state->push_on_queue(p);
tschatzl@7010:     } else {
tschatzl@7010:       assert(!_g1->obj_in_cs(obj), "checking");
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void G1CMOopClosure::do_oop_nv(T* p) {
aoqi@0:   oop obj = oopDesc::load_decode_heap_oop(p);
aoqi@0:   if (_cm->verbose_high()) {
aoqi@0:     gclog_or_tty->print_cr("[%u] we're looking at location "
aoqi@0:                            "*"PTR_FORMAT" = "PTR_FORMAT,
aoqi@0:                            _task->worker_id(), p2i(p), p2i((void*) obj));
aoqi@0:   }
aoqi@0:   _task->deal_with_reference(obj);
aoqi@0: }
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void G1RootRegionScanClosure::do_oop_nv(T* p) {
aoqi@0:   T heap_oop = oopDesc::load_heap_oop(p);
aoqi@0:   if (!oopDesc::is_null(heap_oop)) {
aoqi@0:     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
aoqi@0:     HeapRegion* hr = _g1h->heap_region_containing((HeapWord*) obj);
brutisso@7049:     _cm->grayRoot(obj, obj->size(), _worker_id, hr);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void G1Mux2Closure::do_oop_nv(T* p) {
aoqi@0:   // Apply first closure; then apply the second.
aoqi@0:   _c1->do_oop(p);
aoqi@0:   _c2->do_oop(p);
aoqi@0: }
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void G1TriggerClosure::do_oop_nv(T* p) {
aoqi@0:   // Record that this closure was actually applied (triggered).
aoqi@0:   _triggered = true;
aoqi@0: }
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void G1InvokeIfNotTriggeredClosure::do_oop_nv(T* p) {
aoqi@0:   if (!_trigger_cl->triggered()) {
aoqi@0:     _oop_cl->do_oop(p);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: template <class T>
aoqi@0: inline void G1UpdateRSOrPushRefOopClosure::do_oop_nv(T* p) {
aoqi@0:   oop obj = oopDesc::load_decode_heap_oop(p);
brutisso@7049:   if (obj == NULL) {
brutisso@7049:     return;
brutisso@7049:   }
aoqi@0: #ifdef ASSERT
aoqi@0:   // can't do because of races
aoqi@0:   // assert(obj == NULL || obj->is_oop(), "expected an oop");
aoqi@0: 
aoqi@0:   // Do the safe subset of is_oop
aoqi@0: #ifdef CHECK_UNHANDLED_OOPS
brutisso@7049:   oopDesc* o = obj.obj();
aoqi@0: #else
brutisso@7049:   oopDesc* o = obj;
aoqi@0: #endif // CHECK_UNHANDLED_OOPS
brutisso@7049:   assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
brutisso@7049:   assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
aoqi@0: #endif // ASSERT
aoqi@0: 
aoqi@0:   assert(_from != NULL, "from region must be non-NULL");
aoqi@0:   assert(_from->is_in_reserved(p), "p is not in from");
aoqi@0: 
aoqi@0:   HeapRegion* to = _g1->heap_region_containing(obj);
brutisso@7049:   if (_from == to) {
brutisso@7049:     // Normally this closure should only be called with cross-region references.
brutisso@7049:     // But since Java threads are manipulating the references concurrently and we
brutisso@7049:     // reload the values things may have changed.
brutisso@7049:     return;
brutisso@7049:   }
brutisso@7049:   // The _record_refs_into_cset flag is true during the RSet
brutisso@7049:   // updating part of an evacuation pause. It is false at all
brutisso@7049:   // other times:
brutisso@7049:   //  * rebuilding the remembered sets after a full GC
brutisso@7049:   //  * during concurrent refinement.
brutisso@7049:   //  * updating the remembered sets of regions in the collection
brutisso@7049:   //    set in the event of an evacuation failure (when deferred
brutisso@7049:   //    updates are enabled).
aoqi@0: 
brutisso@7049:   if (_record_refs_into_cset && to->in_collection_set()) {
brutisso@7049:     // We are recording references that point into the collection
brutisso@7049:     // set and this particular reference does exactly that...
brutisso@7049:     // If the referenced object has already been forwarded
brutisso@7049:     // to itself, we are handling an evacuation failure and
brutisso@7049:     // we have already visited/tried to copy this object
brutisso@7049:     // there is no need to retry.
brutisso@7049:     if (!self_forwarded(obj)) {
brutisso@7049:       assert(_push_ref_cl != NULL, "should not be null");
brutisso@7049:       // Push the reference in the refs queue of the G1ParScanThreadState
brutisso@7049:       // instance for this worker thread.
brutisso@7049:       _push_ref_cl->do_oop(p);
brutisso@7049:      }
aoqi@0: 
brutisso@7049:     // Deferred updates to the CSet are either discarded (in the normal case),
brutisso@7049:     // or processed (if an evacuation failure occurs) at the end
brutisso@7049:     // of the collection.
brutisso@7049:     // See G1RemSet::cleanup_after_oops_into_collection_set_do().
brutisso@7049:   } else {
aoqi@0:     // We either don't care about pushing references that point into the
aoqi@0:     // collection set (i.e. we're not during an evacuation pause) _or_
aoqi@0:     // the reference doesn't point into the collection set. Either way
aoqi@0:     // we add the reference directly to the RSet of the region containing
aoqi@0:     // the referenced object.
aoqi@0:     assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
aoqi@0:     to->rem_set()->add_reference(p, _worker_i);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP