author | jwilhelm |
Thu, 03 Oct 2013 21:36:29 +0200 | |
changeset 20398 | b206c580c45f |
parent 14073 | 6012178c0c19 |
child 22807 | 1cf02ef734e2 |
child 22551 | 9bf46d16dcc6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP |
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#define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP |
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#include "gc_implementation/g1/concurrentMark.inline.hpp" |
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#include "gc_implementation/g1/g1CollectedHeap.hpp" |
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#include "gc_implementation/g1/g1OopClosures.hpp" |
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#include "gc_implementation/g1/g1RemSet.hpp" |
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#include "gc_implementation/g1/heapRegionRemSet.hpp" |
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/* |
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* This really ought to be an inline function, but apparently the C++ |
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* compiler sometimes sees fit to ignore inline declarations. Sigh. |
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*/ |
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||
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template <class T> |
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inline void FilterIntoCSClosure::do_oop_nv(T* p) { |
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T heap_oop = oopDesc::load_heap_oop(p); |
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if (!oopDesc::is_null(heap_oop) && |
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_g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop))) { |
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_oc->do_oop(p); |
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} |
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} |
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||
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template <class T> |
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inline void FilterOutOfRegionClosure::do_oop_nv(T* p) { |
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T heap_oop = oopDesc::load_heap_oop(p); |
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if (!oopDesc::is_null(heap_oop)) { |
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HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop); |
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if (obj_hw < _r_bottom || obj_hw >= _r_end) { |
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_oc->do_oop(p); |
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} |
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} |
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} |
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// This closure is applied to the fields of the objects that have just been copied. |
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template <class T> |
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inline void G1ParScanClosure::do_oop_nv(T* p) { |
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T heap_oop = oopDesc::load_heap_oop(p); |
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if (!oopDesc::is_null(heap_oop)) { |
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oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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if (_g1->in_cset_fast_test(obj)) { |
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// We're not going to even bother checking whether the object is |
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// already forwarded or not, as this usually causes an immediate |
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// stall. We'll try to prefetch the object (for write, given that |
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// we might need to install the forwarding reference) and we'll |
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// get back to it when pop it from the queue |
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Prefetch::write(obj->mark_addr(), 0); |
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Prefetch::read(obj->mark_addr(), (HeapWordSize*2)); |
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// slightly paranoid test; I'm trying to catch potential |
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// problems before we go into push_on_queue to know where the |
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// problem is coming from |
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assert((obj == oopDesc::load_decode_heap_oop(p)) || |
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(obj->is_forwarded() && |
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obj->forwardee() == oopDesc::load_decode_heap_oop(p)), |
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"p should still be pointing to obj or to its forwardee"); |
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_par_scan_state->push_on_queue(p); |
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} else { |
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_par_scan_state->update_rs(_from, p, _par_scan_state->queue_num()); |
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} |
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} |
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} |
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template <class T> |
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inline void G1ParPushHeapRSClosure::do_oop_nv(T* p) { |
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T heap_oop = oopDesc::load_heap_oop(p); |
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if (!oopDesc::is_null(heap_oop)) { |
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oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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if (_g1->in_cset_fast_test(obj)) { |
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Prefetch::write(obj->mark_addr(), 0); |
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Prefetch::read(obj->mark_addr(), (HeapWordSize*2)); |
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// Place on the references queue |
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_par_scan_state->push_on_queue(p); |
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} |
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} |
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} |
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template <class T> |
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inline void G1CMOopClosure::do_oop_nv(T* p) { |
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assert(_g1h->is_in_g1_reserved((HeapWord*) p), "invariant"); |
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assert(!_g1h->is_on_master_free_list( |
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_g1h->heap_region_containing((HeapWord*) p)), "invariant"); |
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oop obj = oopDesc::load_decode_heap_oop(p); |
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if (_cm->verbose_high()) { |
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gclog_or_tty->print_cr("[%u] we're looking at location " |
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"*"PTR_FORMAT" = "PTR_FORMAT, |
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_task->worker_id(), p, (void*) obj); |
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} |
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_task->deal_with_reference(obj); |
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} |
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template <class T> |
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inline void G1RootRegionScanClosure::do_oop_nv(T* p) { |
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T heap_oop = oopDesc::load_heap_oop(p); |
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if (!oopDesc::is_null(heap_oop)) { |
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oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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HeapRegion* hr = _g1h->heap_region_containing((HeapWord*) obj); |
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if (hr != NULL) { |
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_cm->grayRoot(obj, obj->size(), _worker_id, hr); |
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} |
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} |
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} |
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template <class T> |
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inline void G1Mux2Closure::do_oop_nv(T* p) { |
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// Apply first closure; then apply the second. |
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_c1->do_oop(p); |
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_c2->do_oop(p); |
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} |
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template <class T> |
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inline void G1TriggerClosure::do_oop_nv(T* p) { |
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// Record that this closure was actually applied (triggered). |
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_triggered = true; |
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} |
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template <class T> |
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inline void G1InvokeIfNotTriggeredClosure::do_oop_nv(T* p) { |
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if (!_trigger_cl->triggered()) { |
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_oop_cl->do_oop(p); |
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} |
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} |
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template <class T> |
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inline void G1UpdateRSOrPushRefOopClosure::do_oop_nv(T* p) { |
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oop obj = oopDesc::load_decode_heap_oop(p); |
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#ifdef ASSERT |
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// can't do because of races |
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// assert(obj == NULL || obj->is_oop(), "expected an oop"); |
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// Do the safe subset of is_oop |
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if (obj != NULL) { |
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#ifdef CHECK_UNHANDLED_OOPS |
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oopDesc* o = obj.obj(); |
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#else |
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oopDesc* o = obj; |
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#endif // CHECK_UNHANDLED_OOPS |
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assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); |
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assert(Universe::heap()->is_in_reserved(obj), "must be in heap"); |
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} |
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#endif // ASSERT |
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|
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assert(_from != NULL, "from region must be non-NULL"); |
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assert(_from->is_in_reserved(p), "p is not in from"); |
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|
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HeapRegion* to = _g1->heap_region_containing(obj); |
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if (to != NULL && _from != to) { |
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// The _record_refs_into_cset flag is true during the RSet |
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// updating part of an evacuation pause. It is false at all |
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// other times: |
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// * rebuilding the rembered sets after a full GC |
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// * during concurrent refinement. |
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// * updating the remembered sets of regions in the collection |
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// set in the event of an evacuation failure (when deferred |
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// updates are enabled). |
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|
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if (_record_refs_into_cset && to->in_collection_set()) { |
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// We are recording references that point into the collection |
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// set and this particular reference does exactly that... |
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// If the referenced object has already been forwarded |
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// to itself, we are handling an evacuation failure and |
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// we have already visited/tried to copy this object |
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// there is no need to retry. |
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if (!self_forwarded(obj)) { |
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assert(_push_ref_cl != NULL, "should not be null"); |
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// Push the reference in the refs queue of the G1ParScanThreadState |
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// instance for this worker thread. |
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_push_ref_cl->do_oop(p); |
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} |
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// Deferred updates to the CSet are either discarded (in the normal case), |
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// or processed (if an evacuation failure occurs) at the end |
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// of the collection. |
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// See G1RemSet::cleanup_after_oops_into_collection_set_do(). |
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return; |
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} |
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// We either don't care about pushing references that point into the |
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// collection set (i.e. we're not during an evacuation pause) _or_ |
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// the reference doesn't point into the collection set. Either way |
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// we add the reference directly to the RSet of the region containing |
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// the referenced object. |
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assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); |
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to->rem_set()->add_reference(p, _worker_i); |
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} |
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} |
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|
7397 | 217 |
#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP |