author | jwilhelm |
Thu, 03 Oct 2013 21:36:29 +0200 | |
changeset 20398 | b206c580c45f |
parent 19986 | 33d188c66ed9 |
child 20282 | 7f9cbdf89af2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2013, 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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#include "precompiled.hpp" |
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#include "code/nmethod.hpp" |
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#include "gc_implementation/g1/g1BlockOffsetTable.inline.hpp" |
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#include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
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#include "gc_implementation/g1/g1OopClosures.inline.hpp" |
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#include "gc_implementation/g1/heapRegion.inline.hpp" |
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#include "gc_implementation/g1/heapRegionRemSet.hpp" |
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#include "gc_implementation/g1/heapRegionSeq.inline.hpp" |
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#include "memory/genOopClosures.inline.hpp" |
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#include "memory/iterator.hpp" |
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#include "oops/oop.inline.hpp" |
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int HeapRegion::LogOfHRGrainBytes = 0; |
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int HeapRegion::LogOfHRGrainWords = 0; |
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size_t HeapRegion::GrainBytes = 0; |
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size_t HeapRegion::GrainWords = 0; |
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size_t HeapRegion::CardsPerRegion = 0; |
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HeapRegionDCTOC::HeapRegionDCTOC(G1CollectedHeap* g1, |
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HeapRegion* hr, ExtendedOopClosure* cl, |
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CardTableModRefBS::PrecisionStyle precision, |
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FilterKind fk) : |
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ContiguousSpaceDCTOC(hr, cl, precision, NULL), |
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_hr(hr), _fk(fk), _g1(g1) { } |
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FilterOutOfRegionClosure::FilterOutOfRegionClosure(HeapRegion* r, |
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OopClosure* oc) : |
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_r_bottom(r->bottom()), _r_end(r->end()), _oc(oc) { } |
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template<class ClosureType> |
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HeapWord* walk_mem_region_loop(ClosureType* cl, G1CollectedHeap* g1h, |
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HeapRegion* hr, |
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HeapWord* cur, HeapWord* top) { |
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oop cur_oop = oop(cur); |
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int oop_size = cur_oop->size(); |
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HeapWord* next_obj = cur + oop_size; |
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while (next_obj < top) { |
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// Keep filtering the remembered set. |
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if (!g1h->is_obj_dead(cur_oop, hr)) { |
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// Bottom lies entirely below top, so we can call the |
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// non-memRegion version of oop_iterate below. |
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cur_oop->oop_iterate(cl); |
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} |
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cur = next_obj; |
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cur_oop = oop(cur); |
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oop_size = cur_oop->size(); |
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next_obj = cur + oop_size; |
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} |
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return cur; |
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} |
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void HeapRegionDCTOC::walk_mem_region_with_cl(MemRegion mr, |
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HeapWord* bottom, |
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HeapWord* top, |
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ExtendedOopClosure* cl) { |
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G1CollectedHeap* g1h = _g1; |
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int oop_size; |
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ExtendedOopClosure* cl2 = NULL; |
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FilterIntoCSClosure intoCSFilt(this, g1h, cl); |
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FilterOutOfRegionClosure outOfRegionFilt(_hr, cl); |
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switch (_fk) { |
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case NoFilterKind: cl2 = cl; break; |
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case IntoCSFilterKind: cl2 = &intoCSFilt; break; |
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case OutOfRegionFilterKind: cl2 = &outOfRegionFilt; break; |
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default: ShouldNotReachHere(); |
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} |
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// Start filtering what we add to the remembered set. If the object is |
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// not considered dead, either because it is marked (in the mark bitmap) |
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// or it was allocated after marking finished, then we add it. Otherwise |
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// we can safely ignore the object. |
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if (!g1h->is_obj_dead(oop(bottom), _hr)) { |
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oop_size = oop(bottom)->oop_iterate(cl2, mr); |
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} else { |
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oop_size = oop(bottom)->size(); |
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} |
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bottom += oop_size; |
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if (bottom < top) { |
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// We replicate the loop below for several kinds of possible filters. |
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switch (_fk) { |
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case NoFilterKind: |
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bottom = walk_mem_region_loop(cl, g1h, _hr, bottom, top); |
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break; |
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case IntoCSFilterKind: { |
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FilterIntoCSClosure filt(this, g1h, cl); |
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bottom = walk_mem_region_loop(&filt, g1h, _hr, bottom, top); |
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break; |
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} |
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case OutOfRegionFilterKind: { |
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FilterOutOfRegionClosure filt(_hr, cl); |
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bottom = walk_mem_region_loop(&filt, g1h, _hr, bottom, top); |
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break; |
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} |
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default: |
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ShouldNotReachHere(); |
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} |
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// Last object. Need to do dead-obj filtering here too. |
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if (!g1h->is_obj_dead(oop(bottom), _hr)) { |
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oop(bottom)->oop_iterate(cl2, mr); |
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} |
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} |
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} |
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// Minimum region size; we won't go lower than that. |
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// We might want to decrease this in the future, to deal with small |
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// heaps a bit more efficiently. |
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#define MIN_REGION_SIZE ( 1024 * 1024 ) |
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// Maximum region size; we don't go higher than that. There's a good |
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// reason for having an upper bound. We don't want regions to get too |
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// large, otherwise cleanup's effectiveness would decrease as there |
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// will be fewer opportunities to find totally empty regions after |
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// marking. |
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#define MAX_REGION_SIZE ( 32 * 1024 * 1024 ) |
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// The automatic region size calculation will try to have around this |
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// many regions in the heap (based on the min heap size). |
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#define TARGET_REGION_NUMBER 2048 |
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size_t HeapRegion::max_region_size() { |
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return (size_t)MAX_REGION_SIZE; |
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} |
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void HeapRegion::setup_heap_region_size(size_t initial_heap_size, size_t max_heap_size) { |
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uintx region_size = G1HeapRegionSize; |
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if (FLAG_IS_DEFAULT(G1HeapRegionSize)) { |
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size_t average_heap_size = (initial_heap_size + max_heap_size) / 2; |
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region_size = MAX2(average_heap_size / TARGET_REGION_NUMBER, |
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(uintx) MIN_REGION_SIZE); |
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} |
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|
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int region_size_log = log2_long((jlong) region_size); |
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// Recalculate the region size to make sure it's a power of |
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// 2. This means that region_size is the largest power of 2 that's |
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// <= what we've calculated so far. |
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region_size = ((uintx)1 << region_size_log); |
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|
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// Now make sure that we don't go over or under our limits. |
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if (region_size < MIN_REGION_SIZE) { |
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region_size = MIN_REGION_SIZE; |
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} else if (region_size > MAX_REGION_SIZE) { |
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region_size = MAX_REGION_SIZE; |
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} |
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if (region_size != G1HeapRegionSize) { |
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// Update the flag to make sure that PrintFlagsFinal logs the correct value |
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FLAG_SET_ERGO(uintx, G1HeapRegionSize, region_size); |
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} |
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// And recalculate the log. |
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region_size_log = log2_long((jlong) region_size); |
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|
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// Now, set up the globals. |
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guarantee(LogOfHRGrainBytes == 0, "we should only set it once"); |
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LogOfHRGrainBytes = region_size_log; |
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|
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guarantee(LogOfHRGrainWords == 0, "we should only set it once"); |
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LogOfHRGrainWords = LogOfHRGrainBytes - LogHeapWordSize; |
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|
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guarantee(GrainBytes == 0, "we should only set it once"); |
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// The cast to int is safe, given that we've bounded region_size by |
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// MIN_REGION_SIZE and MAX_REGION_SIZE. |
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GrainBytes = (size_t)region_size; |
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196 |
|
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197 |
guarantee(GrainWords == 0, "we should only set it once"); |
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198 |
GrainWords = GrainBytes >> LogHeapWordSize; |
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199 |
guarantee((size_t) 1 << LogOfHRGrainWords == GrainWords, "sanity"); |
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200 |
|
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201 |
guarantee(CardsPerRegion == 0, "we should only set it once"); |
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CardsPerRegion = GrainBytes >> CardTableModRefBS::card_shift; |
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} |
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204 |
|
1374 | 205 |
void HeapRegion::reset_after_compaction() { |
206 |
G1OffsetTableContigSpace::reset_after_compaction(); |
|
207 |
// After a compaction the mark bitmap is invalid, so we must |
|
208 |
// treat all objects as being inside the unmarked area. |
|
209 |
zero_marked_bytes(); |
|
210 |
init_top_at_mark_start(); |
|
211 |
} |
|
212 |
||
213 |
void HeapRegion::hr_clear(bool par, bool clear_space) { |
|
7923 | 214 |
assert(_humongous_type == NotHumongous, |
215 |
"we should have already filtered out humongous regions"); |
|
216 |
assert(_humongous_start_region == NULL, |
|
217 |
"we should have already filtered out humongous regions"); |
|
218 |
assert(_end == _orig_end, |
|
219 |
"we should have already filtered out humongous regions"); |
|
220 |
||
1374 | 221 |
_in_collection_set = false; |
222 |
||
223 |
set_young_index_in_cset(-1); |
|
224 |
uninstall_surv_rate_group(); |
|
225 |
set_young_type(NotYoung); |
|
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226 |
reset_pre_dummy_top(); |
1374 | 227 |
|
228 |
if (!par) { |
|
229 |
// If this is parallel, this will be done later. |
|
230 |
HeapRegionRemSet* hrrs = rem_set(); |
|
19339 | 231 |
hrrs->clear(); |
1387 | 232 |
_claimed = InitialClaimValue; |
1374 | 233 |
} |
234 |
zero_marked_bytes(); |
|
235 |
||
236 |
_offsets.resize(HeapRegion::GrainWords); |
|
237 |
init_top_at_mark_start(); |
|
1388 | 238 |
if (clear_space) clear(SpaceDecorator::Mangle); |
1374 | 239 |
} |
240 |
||
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241 |
void HeapRegion::par_clear() { |
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242 |
assert(used() == 0, "the region should have been already cleared"); |
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243 |
assert(capacity() == HeapRegion::GrainBytes, "should be back to normal"); |
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244 |
HeapRegionRemSet* hrrs = rem_set(); |
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245 |
hrrs->clear(); |
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246 |
CardTableModRefBS* ct_bs = |
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247 |
(CardTableModRefBS*)G1CollectedHeap::heap()->barrier_set(); |
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248 |
ct_bs->clear(MemRegion(bottom(), end())); |
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249 |
} |
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250 |
|
1374 | 251 |
void HeapRegion::calc_gc_efficiency() { |
13482 | 252 |
// GC efficiency is the ratio of how much space would be |
253 |
// reclaimed over how long we predict it would take to reclaim it. |
|
1374 | 254 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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255 |
G1CollectorPolicy* g1p = g1h->g1_policy(); |
13482 | 256 |
|
257 |
// Retrieve a prediction of the elapsed time for this region for |
|
258 |
// a mixed gc because the region will only be evacuated during a |
|
259 |
// mixed gc. |
|
260 |
double region_elapsed_time_ms = |
|
261 |
g1p->predict_region_elapsed_time_ms(this, false /* for_young_gc */); |
|
262 |
_gc_efficiency = (double) reclaimable_bytes() / region_elapsed_time_ms; |
|
1374 | 263 |
} |
264 |
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265 |
void HeapRegion::set_startsHumongous(HeapWord* new_top, HeapWord* new_end) { |
7923 | 266 |
assert(!isHumongous(), "sanity / pre-condition"); |
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267 |
assert(end() == _orig_end, |
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|
268 |
"Should be normal before the humongous object allocation"); |
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269 |
assert(top() == bottom(), "should be empty"); |
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|
270 |
assert(bottom() <= new_top && new_top <= new_end, "pre-condition"); |
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271 |
|
1387 | 272 |
_humongous_type = StartsHumongous; |
1374 | 273 |
_humongous_start_region = this; |
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274 |
|
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275 |
set_end(new_end); |
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276 |
_offsets.set_for_starts_humongous(new_top); |
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277 |
} |
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|
278 |
|
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|
279 |
void HeapRegion::set_continuesHumongous(HeapRegion* first_hr) { |
7923 | 280 |
assert(!isHumongous(), "sanity / pre-condition"); |
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281 |
assert(end() == _orig_end, |
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|
282 |
"Should be normal before the humongous object allocation"); |
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|
283 |
assert(top() == bottom(), "should be empty"); |
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|
284 |
assert(first_hr->startsHumongous(), "pre-condition"); |
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|
285 |
|
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|
286 |
_humongous_type = ContinuesHumongous; |
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|
287 |
_humongous_start_region = first_hr; |
1374 | 288 |
} |
289 |
||
7923 | 290 |
void HeapRegion::set_notHumongous() { |
291 |
assert(isHumongous(), "pre-condition"); |
|
292 |
||
293 |
if (startsHumongous()) { |
|
294 |
assert(top() <= end(), "pre-condition"); |
|
295 |
set_end(_orig_end); |
|
296 |
if (top() > end()) { |
|
297 |
// at least one "continues humongous" region after it |
|
298 |
set_top(end()); |
|
299 |
} |
|
300 |
} else { |
|
301 |
// continues humongous |
|
302 |
assert(end() == _orig_end, "sanity"); |
|
303 |
} |
|
304 |
||
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|
305 |
assert(capacity() == HeapRegion::GrainBytes, "pre-condition"); |
7923 | 306 |
_humongous_type = NotHumongous; |
307 |
_humongous_start_region = NULL; |
|
308 |
} |
|
309 |
||
1374 | 310 |
bool HeapRegion::claimHeapRegion(jint claimValue) { |
311 |
jint current = _claimed; |
|
312 |
if (current != claimValue) { |
|
313 |
jint res = Atomic::cmpxchg(claimValue, &_claimed, current); |
|
314 |
if (res == current) { |
|
315 |
return true; |
|
316 |
} |
|
317 |
} |
|
318 |
return false; |
|
319 |
} |
|
320 |
||
321 |
HeapWord* HeapRegion::next_block_start_careful(HeapWord* addr) { |
|
322 |
HeapWord* low = addr; |
|
323 |
HeapWord* high = end(); |
|
324 |
while (low < high) { |
|
325 |
size_t diff = pointer_delta(high, low); |
|
326 |
// Must add one below to bias toward the high amount. Otherwise, if |
|
327 |
// "high" were at the desired value, and "low" were one less, we |
|
328 |
// would not converge on "high". This is not symmetric, because |
|
329 |
// we set "high" to a block start, which might be the right one, |
|
330 |
// which we don't do for "low". |
|
331 |
HeapWord* middle = low + (diff+1)/2; |
|
332 |
if (middle == high) return high; |
|
333 |
HeapWord* mid_bs = block_start_careful(middle); |
|
334 |
if (mid_bs < addr) { |
|
335 |
low = middle; |
|
336 |
} else { |
|
337 |
high = mid_bs; |
|
338 |
} |
|
339 |
} |
|
340 |
assert(low == high && low >= addr, "Didn't work."); |
|
341 |
return low; |
|
342 |
} |
|
343 |
||
344 |
#ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
|
345 |
#pragma warning( disable:4355 ) // 'this' : used in base member initializer list |
|
346 |
#endif // _MSC_VER |
|
347 |
||
348 |
||
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|
349 |
HeapRegion::HeapRegion(uint hrs_index, |
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|
350 |
G1BlockOffsetSharedArray* sharedOffsetArray, |
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|
351 |
MemRegion mr) : |
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|
352 |
G1OffsetTableContigSpace(sharedOffsetArray, mr), |
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|
353 |
_hrs_index(hrs_index), |
1387 | 354 |
_humongous_type(NotHumongous), _humongous_start_region(NULL), |
10243
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|
355 |
_in_collection_set(false), |
1374 | 356 |
_next_in_special_set(NULL), _orig_end(NULL), |
1387 | 357 |
_claimed(InitialClaimValue), _evacuation_failed(false), |
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|
358 |
_prev_marked_bytes(0), _next_marked_bytes(0), _gc_efficiency(0.0), |
1374 | 359 |
_young_type(NotYoung), _next_young_region(NULL), |
7923 | 360 |
_next_dirty_cards_region(NULL), _next(NULL), _pending_removal(false), |
361 |
#ifdef ASSERT |
|
362 |
_containing_set(NULL), |
|
363 |
#endif // ASSERT |
|
364 |
_young_index_in_cset(-1), _surv_rate_group(NULL), _age_index(-1), |
|
365 |
_rem_set(NULL), _recorded_rs_length(0), _predicted_elapsed_time_ms(0), |
|
5350
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changeset
|
366 |
_predicted_bytes_to_copy(0) |
1374 | 367 |
{ |
19339 | 368 |
_rem_set = new HeapRegionRemSet(sharedOffsetArray, this); |
1374 | 369 |
_orig_end = mr.end(); |
370 |
// Note that initialize() will set the start of the unmarked area of the |
|
371 |
// region. |
|
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|
372 |
hr_clear(false /*par*/, false /*clear_space*/); |
1388 | 373 |
set_top(bottom()); |
374 |
set_saved_mark(); |
|
1374 | 375 |
|
376 |
assert(HeapRegionRemSet::num_par_rem_sets() > 0, "Invariant."); |
|
377 |
} |
|
378 |
||
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|
379 |
CompactibleSpace* HeapRegion::next_compaction_space() const { |
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|
380 |
// We're not using an iterator given that it will wrap around when |
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|
381 |
// it reaches the last region and this is not what we want here. |
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|
382 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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|
383 |
uint index = hrs_index() + 1; |
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|
384 |
while (index < g1h->n_regions()) { |
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|
385 |
HeapRegion* hr = g1h->region_at(index); |
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|
386 |
if (!hr->isHumongous()) { |
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|
387 |
return hr; |
1374 | 388 |
} |
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|
389 |
index += 1; |
1374 | 390 |
} |
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|
391 |
return NULL; |
1374 | 392 |
} |
393 |
||
394 |
void HeapRegion::save_marks() { |
|
395 |
set_saved_mark(); |
|
396 |
} |
|
397 |
||
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|
398 |
void HeapRegion::oops_in_mr_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
1374 | 399 |
HeapWord* p = mr.start(); |
400 |
HeapWord* e = mr.end(); |
|
401 |
oop obj; |
|
402 |
while (p < e) { |
|
403 |
obj = oop(p); |
|
404 |
p += obj->oop_iterate(cl); |
|
405 |
} |
|
406 |
assert(p == e, "bad memregion: doesn't end on obj boundary"); |
|
407 |
} |
|
408 |
||
409 |
#define HeapRegion_OOP_SINCE_SAVE_MARKS_DEFN(OopClosureType, nv_suffix) \ |
|
410 |
void HeapRegion::oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl) { \ |
|
411 |
ContiguousSpace::oop_since_save_marks_iterate##nv_suffix(cl); \ |
|
412 |
} |
|
413 |
SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(HeapRegion_OOP_SINCE_SAVE_MARKS_DEFN) |
|
414 |
||
415 |
||
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|
416 |
void HeapRegion::oop_before_save_marks_iterate(ExtendedOopClosure* cl) { |
1374 | 417 |
oops_in_mr_iterate(MemRegion(bottom(), saved_mark_word()), cl); |
418 |
} |
|
419 |
||
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|
420 |
void HeapRegion::note_self_forwarding_removal_start(bool during_initial_mark, |
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|
421 |
bool during_conc_mark) { |
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|
422 |
// We always recreate the prev marking info and we'll explicitly |
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|
423 |
// mark all objects we find to be self-forwarded on the prev |
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|
424 |
// bitmap. So all objects need to be below PTAMS. |
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|
425 |
_prev_top_at_mark_start = top(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
426 |
_prev_marked_bytes = 0; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
427 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
428 |
if (during_initial_mark) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
429 |
// During initial-mark, we'll also explicitly mark all objects |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
430 |
// we find to be self-forwarded on the next bitmap. So all |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
431 |
// objects need to be below NTAMS. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
432 |
_next_top_at_mark_start = top(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
433 |
_next_marked_bytes = 0; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
434 |
} else if (during_conc_mark) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
435 |
// During concurrent mark, all objects in the CSet (including |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
436 |
// the ones we find to be self-forwarded) are implicitly live. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
437 |
// So all objects need to be above NTAMS. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
438 |
_next_top_at_mark_start = bottom(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
439 |
_next_marked_bytes = 0; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
440 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
441 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
11393
diff
changeset
|
442 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
443 |
void HeapRegion::note_self_forwarding_removal_end(bool during_initial_mark, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
444 |
bool during_conc_mark, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
445 |
size_t marked_bytes) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
446 |
assert(0 <= marked_bytes && marked_bytes <= used(), |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
447 |
err_msg("marked: "SIZE_FORMAT" used: "SIZE_FORMAT, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
448 |
marked_bytes, used())); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
449 |
_prev_marked_bytes = marked_bytes; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
450 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11393
diff
changeset
|
451 |
|
1374 | 452 |
HeapWord* |
453 |
HeapRegion::object_iterate_mem_careful(MemRegion mr, |
|
454 |
ObjectClosure* cl) { |
|
455 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
456 |
// We used to use "block_start_careful" here. But we're actually happy |
|
457 |
// to update the BOT while we do this... |
|
458 |
HeapWord* cur = block_start(mr.start()); |
|
459 |
mr = mr.intersection(used_region()); |
|
460 |
if (mr.is_empty()) return NULL; |
|
461 |
// Otherwise, find the obj that extends onto mr.start(). |
|
462 |
||
463 |
assert(cur <= mr.start() |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
changeset
|
464 |
&& (oop(cur)->klass_or_null() == NULL || |
1374 | 465 |
cur + oop(cur)->size() > mr.start()), |
466 |
"postcondition of block_start"); |
|
467 |
oop obj; |
|
468 |
while (cur < mr.end()) { |
|
469 |
obj = oop(cur); |
|
3262
30d1c247fc25
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diff
changeset
|
470 |
if (obj->klass_or_null() == NULL) { |
1374 | 471 |
// Ran into an unparseable point. |
472 |
return cur; |
|
473 |
} else if (!g1h->is_obj_dead(obj)) { |
|
474 |
cl->do_object(obj); |
|
475 |
} |
|
476 |
if (cl->abort()) return cur; |
|
477 |
// The check above must occur before the operation below, since an |
|
478 |
// abort might invalidate the "size" operation. |
|
479 |
cur += obj->size(); |
|
480 |
} |
|
481 |
return NULL; |
|
482 |
} |
|
483 |
||
484 |
HeapWord* |
|
485 |
HeapRegion:: |
|
486 |
oops_on_card_seq_iterate_careful(MemRegion mr, |
|
6068
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
487 |
FilterOutOfRegionClosure* cl, |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
488 |
bool filter_young, |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
489 |
jbyte* card_ptr) { |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
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diff
changeset
|
490 |
// Currently, we should only have to clean the card if filter_young |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
491 |
// is true and vice versa. |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
492 |
if (filter_young) { |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
493 |
assert(card_ptr != NULL, "pre-condition"); |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
494 |
} else { |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
495 |
assert(card_ptr == NULL, "pre-condition"); |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
496 |
} |
1374 | 497 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
498 |
||
499 |
// If we're within a stop-world GC, then we might look at a card in a |
|
500 |
// GC alloc region that extends onto a GC LAB, which may not be |
|
501 |
// parseable. Stop such at the "saved_mark" of the region. |
|
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
502 |
if (g1h->is_gc_active()) { |
1374 | 503 |
mr = mr.intersection(used_region_at_save_marks()); |
504 |
} else { |
|
505 |
mr = mr.intersection(used_region()); |
|
506 |
} |
|
507 |
if (mr.is_empty()) return NULL; |
|
508 |
// Otherwise, find the obj that extends onto mr.start(). |
|
509 |
||
6068
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
510 |
// The intersection of the incoming mr (for the card) and the |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
511 |
// allocated part of the region is non-empty. This implies that |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
512 |
// we have actually allocated into this region. The code in |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
513 |
// G1CollectedHeap.cpp that allocates a new region sets the |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
514 |
// is_young tag on the region before allocating. Thus we |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
515 |
// safely know if this region is young. |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
516 |
if (is_young() && filter_young) { |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
517 |
return NULL; |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
518 |
} |
80ef41e75a2d
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
5547
diff
changeset
|
519 |
|
6247 | 520 |
assert(!is_young(), "check value of filter_young"); |
521 |
||
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
522 |
// We can only clean the card here, after we make the decision that |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
523 |
// the card is not young. And we only clean the card if we have been |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
524 |
// asked to (i.e., card_ptr != NULL). |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
525 |
if (card_ptr != NULL) { |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
526 |
*card_ptr = CardTableModRefBS::clean_card_val(); |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
527 |
// We must complete this write before we do any of the reads below. |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
528 |
OrderAccess::storeload(); |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
529 |
} |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
8928
diff
changeset
|
530 |
|
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
531 |
// Cache the boundaries of the memory region in some const locals |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
532 |
HeapWord* const start = mr.start(); |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
533 |
HeapWord* const end = mr.end(); |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
534 |
|
1374 | 535 |
// We used to use "block_start_careful" here. But we're actually happy |
536 |
// to update the BOT while we do this... |
|
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
537 |
HeapWord* cur = block_start(start); |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
538 |
assert(cur <= start, "Postcondition"); |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
539 |
|
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
540 |
oop obj; |
1374 | 541 |
|
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
542 |
HeapWord* next = cur; |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
543 |
while (next <= start) { |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
544 |
cur = next; |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
545 |
obj = oop(cur); |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
546 |
if (obj->klass_or_null() == NULL) { |
1374 | 547 |
// Ran into an unparseable point. |
548 |
return cur; |
|
549 |
} |
|
550 |
// Otherwise... |
|
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
551 |
next = (cur + obj->size()); |
1374 | 552 |
} |
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
553 |
|
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
554 |
// If we finish the above loop...We have a parseable object that |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
555 |
// begins on or before the start of the memory region, and ends |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
556 |
// inside or spans the entire region. |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
557 |
|
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
558 |
assert(obj == oop(cur), "sanity"); |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
559 |
assert(cur <= start && |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
560 |
obj->klass_or_null() != NULL && |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
561 |
(cur + obj->size()) > start, |
1374 | 562 |
"Loop postcondition"); |
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
563 |
|
1374 | 564 |
if (!g1h->is_obj_dead(obj)) { |
565 |
obj->oop_iterate(cl, mr); |
|
566 |
} |
|
567 |
||
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
568 |
while (cur < end) { |
1374 | 569 |
obj = oop(cur); |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
570 |
if (obj->klass_or_null() == NULL) { |
1374 | 571 |
// Ran into an unparseable point. |
572 |
return cur; |
|
573 |
}; |
|
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
574 |
|
1374 | 575 |
// Otherwise: |
576 |
next = (cur + obj->size()); |
|
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
577 |
|
1374 | 578 |
if (!g1h->is_obj_dead(obj)) { |
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
579 |
if (next < end || !obj->is_objArray()) { |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
580 |
// This object either does not span the MemRegion |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
581 |
// boundary, or if it does it's not an array. |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
582 |
// Apply closure to whole object. |
1374 | 583 |
obj->oop_iterate(cl); |
584 |
} else { |
|
11586
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
585 |
// This obj is an array that spans the boundary. |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
586 |
// Stop at the boundary. |
ccc217c177ee
7133038: G1: Some small profile based optimizations
johnc
parents:
11455
diff
changeset
|
587 |
obj->oop_iterate(cl, mr); |
1374 | 588 |
} |
589 |
} |
|
590 |
cur = next; |
|
591 |
} |
|
592 |
return NULL; |
|
593 |
} |
|
594 |
||
19339 | 595 |
// Code roots support |
596 |
||
597 |
void HeapRegion::add_strong_code_root(nmethod* nm) { |
|
598 |
HeapRegionRemSet* hrrs = rem_set(); |
|
599 |
hrrs->add_strong_code_root(nm); |
|
600 |
} |
|
601 |
||
602 |
void HeapRegion::remove_strong_code_root(nmethod* nm) { |
|
603 |
HeapRegionRemSet* hrrs = rem_set(); |
|
604 |
hrrs->remove_strong_code_root(nm); |
|
605 |
} |
|
606 |
||
607 |
void HeapRegion::migrate_strong_code_roots() { |
|
608 |
assert(in_collection_set(), "only collection set regions"); |
|
609 |
assert(!isHumongous(), "not humongous regions"); |
|
610 |
||
611 |
HeapRegionRemSet* hrrs = rem_set(); |
|
612 |
hrrs->migrate_strong_code_roots(); |
|
613 |
} |
|
614 |
||
615 |
void HeapRegion::strong_code_roots_do(CodeBlobClosure* blk) const { |
|
616 |
HeapRegionRemSet* hrrs = rem_set(); |
|
617 |
hrrs->strong_code_roots_do(blk); |
|
618 |
} |
|
619 |
||
620 |
class VerifyStrongCodeRootOopClosure: public OopClosure { |
|
621 |
const HeapRegion* _hr; |
|
622 |
nmethod* _nm; |
|
623 |
bool _failures; |
|
624 |
bool _has_oops_in_region; |
|
625 |
||
626 |
template <class T> void do_oop_work(T* p) { |
|
627 |
T heap_oop = oopDesc::load_heap_oop(p); |
|
628 |
if (!oopDesc::is_null(heap_oop)) { |
|
629 |
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
630 |
||
631 |
// Note: not all the oops embedded in the nmethod are in the |
|
632 |
// current region. We only look at those which are. |
|
633 |
if (_hr->is_in(obj)) { |
|
634 |
// Object is in the region. Check that its less than top |
|
635 |
if (_hr->top() <= (HeapWord*)obj) { |
|
636 |
// Object is above top |
|
637 |
gclog_or_tty->print_cr("Object "PTR_FORMAT" in region " |
|
638 |
"["PTR_FORMAT", "PTR_FORMAT") is above " |
|
639 |
"top "PTR_FORMAT, |
|
640 |
obj, _hr->bottom(), _hr->end(), _hr->top()); |
|
641 |
_failures = true; |
|
642 |
return; |
|
643 |
} |
|
644 |
// Nmethod has at least one oop in the current region |
|
645 |
_has_oops_in_region = true; |
|
646 |
} |
|
647 |
} |
|
648 |
} |
|
649 |
||
650 |
public: |
|
651 |
VerifyStrongCodeRootOopClosure(const HeapRegion* hr, nmethod* nm): |
|
652 |
_hr(hr), _failures(false), _has_oops_in_region(false) {} |
|
653 |
||
654 |
void do_oop(narrowOop* p) { do_oop_work(p); } |
|
655 |
void do_oop(oop* p) { do_oop_work(p); } |
|
656 |
||
657 |
bool failures() { return _failures; } |
|
658 |
bool has_oops_in_region() { return _has_oops_in_region; } |
|
659 |
}; |
|
660 |
||
661 |
class VerifyStrongCodeRootCodeBlobClosure: public CodeBlobClosure { |
|
662 |
const HeapRegion* _hr; |
|
663 |
bool _failures; |
|
664 |
public: |
|
665 |
VerifyStrongCodeRootCodeBlobClosure(const HeapRegion* hr) : |
|
666 |
_hr(hr), _failures(false) {} |
|
667 |
||
668 |
void do_code_blob(CodeBlob* cb) { |
|
669 |
nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); |
|
670 |
if (nm != NULL) { |
|
671 |
// Verify that the nemthod is live |
|
672 |
if (!nm->is_alive()) { |
|
673 |
gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] has dead nmethod " |
|
674 |
PTR_FORMAT" in its strong code roots", |
|
675 |
_hr->bottom(), _hr->end(), nm); |
|
676 |
_failures = true; |
|
677 |
} else { |
|
678 |
VerifyStrongCodeRootOopClosure oop_cl(_hr, nm); |
|
679 |
nm->oops_do(&oop_cl); |
|
680 |
if (!oop_cl.has_oops_in_region()) { |
|
681 |
gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] has nmethod " |
|
682 |
PTR_FORMAT" in its strong code roots " |
|
683 |
"with no pointers into region", |
|
684 |
_hr->bottom(), _hr->end(), nm); |
|
685 |
_failures = true; |
|
686 |
} else if (oop_cl.failures()) { |
|
687 |
gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] has other " |
|
688 |
"failures for nmethod "PTR_FORMAT, |
|
689 |
_hr->bottom(), _hr->end(), nm); |
|
690 |
_failures = true; |
|
691 |
} |
|
692 |
} |
|
693 |
} |
|
694 |
} |
|
695 |
||
696 |
bool failures() { return _failures; } |
|
697 |
}; |
|
698 |
||
699 |
void HeapRegion::verify_strong_code_roots(VerifyOption vo, bool* failures) const { |
|
700 |
if (!G1VerifyHeapRegionCodeRoots) { |
|
701 |
// We're not verifying code roots. |
|
702 |
return; |
|
703 |
} |
|
704 |
if (vo == VerifyOption_G1UseMarkWord) { |
|
705 |
// Marking verification during a full GC is performed after class |
|
706 |
// unloading, code cache unloading, etc so the strong code roots |
|
707 |
// attached to each heap region are in an inconsistent state. They won't |
|
708 |
// be consistent until the strong code roots are rebuilt after the |
|
709 |
// actual GC. Skip verifying the strong code roots in this particular |
|
710 |
// time. |
|
711 |
assert(VerifyDuringGC, "only way to get here"); |
|
712 |
return; |
|
713 |
} |
|
714 |
||
715 |
HeapRegionRemSet* hrrs = rem_set(); |
|
716 |
int strong_code_roots_length = hrrs->strong_code_roots_list_length(); |
|
717 |
||
718 |
// if this region is empty then there should be no entries |
|
719 |
// on its strong code root list |
|
720 |
if (is_empty()) { |
|
721 |
if (strong_code_roots_length > 0) { |
|
722 |
gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] is empty " |
|
723 |
"but has "INT32_FORMAT" code root entries", |
|
724 |
bottom(), end(), strong_code_roots_length); |
|
725 |
*failures = true; |
|
726 |
} |
|
727 |
return; |
|
728 |
} |
|
729 |
||
730 |
// An H-region should have an empty strong code root list |
|
731 |
if (isHumongous()) { |
|
732 |
if (strong_code_roots_length > 0) { |
|
733 |
gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] is humongous " |
|
734 |
"but has "INT32_FORMAT" code root entries", |
|
735 |
bottom(), end(), strong_code_roots_length); |
|
736 |
*failures = true; |
|
737 |
} |
|
738 |
return; |
|
739 |
} |
|
740 |
||
741 |
VerifyStrongCodeRootCodeBlobClosure cb_cl(this); |
|
742 |
strong_code_roots_do(&cb_cl); |
|
743 |
||
744 |
if (cb_cl.failures()) { |
|
745 |
*failures = true; |
|
746 |
} |
|
747 |
} |
|
748 |
||
1374 | 749 |
void HeapRegion::print() const { print_on(gclog_or_tty); } |
750 |
void HeapRegion::print_on(outputStream* st) const { |
|
751 |
if (isHumongous()) { |
|
752 |
if (startsHumongous()) |
|
753 |
st->print(" HS"); |
|
754 |
else |
|
755 |
st->print(" HC"); |
|
756 |
} else { |
|
757 |
st->print(" "); |
|
758 |
} |
|
759 |
if (in_collection_set()) |
|
760 |
st->print(" CS"); |
|
761 |
else |
|
762 |
st->print(" "); |
|
763 |
if (is_young()) |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5344
diff
changeset
|
764 |
st->print(is_survivor() ? " SU" : " Y "); |
1374 | 765 |
else |
766 |
st->print(" "); |
|
767 |
if (is_empty()) |
|
768 |
st->print(" F"); |
|
769 |
else |
|
770 |
st->print(" "); |
|
10997
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10770
diff
changeset
|
771 |
st->print(" TS %5d", _gc_time_stamp); |
5344 | 772 |
st->print(" PTAMS "PTR_FORMAT" NTAMS "PTR_FORMAT, |
773 |
prev_top_at_mark_start(), next_top_at_mark_start()); |
|
1374 | 774 |
G1OffsetTableContigSpace::print_on(st); |
775 |
} |
|
776 |
||
19339 | 777 |
class VerifyLiveClosure: public OopClosure { |
778 |
private: |
|
779 |
G1CollectedHeap* _g1h; |
|
780 |
CardTableModRefBS* _bs; |
|
781 |
oop _containing_obj; |
|
782 |
bool _failures; |
|
783 |
int _n_failures; |
|
784 |
VerifyOption _vo; |
|
785 |
public: |
|
786 |
// _vo == UsePrevMarking -> use "prev" marking information, |
|
787 |
// _vo == UseNextMarking -> use "next" marking information, |
|
788 |
// _vo == UseMarkWord -> use mark word from object header. |
|
789 |
VerifyLiveClosure(G1CollectedHeap* g1h, VerifyOption vo) : |
|
790 |
_g1h(g1h), _bs(NULL), _containing_obj(NULL), |
|
791 |
_failures(false), _n_failures(0), _vo(vo) |
|
792 |
{ |
|
793 |
BarrierSet* bs = _g1h->barrier_set(); |
|
794 |
if (bs->is_a(BarrierSet::CardTableModRef)) |
|
795 |
_bs = (CardTableModRefBS*)bs; |
|
796 |
} |
|
797 |
||
798 |
void set_containing_obj(oop obj) { |
|
799 |
_containing_obj = obj; |
|
800 |
} |
|
801 |
||
802 |
bool failures() { return _failures; } |
|
803 |
int n_failures() { return _n_failures; } |
|
804 |
||
805 |
virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
806 |
virtual void do_oop( oop* p) { do_oop_work(p); } |
|
807 |
||
808 |
void print_object(outputStream* out, oop obj) { |
|
809 |
#ifdef PRODUCT |
|
810 |
Klass* k = obj->klass(); |
|
811 |
const char* class_name = InstanceKlass::cast(k)->external_name(); |
|
812 |
out->print_cr("class name %s", class_name); |
|
813 |
#else // PRODUCT |
|
814 |
obj->print_on(out); |
|
815 |
#endif // PRODUCT |
|
816 |
} |
|
817 |
||
818 |
template <class T> |
|
819 |
void do_oop_work(T* p) { |
|
820 |
assert(_containing_obj != NULL, "Precondition"); |
|
821 |
assert(!_g1h->is_obj_dead_cond(_containing_obj, _vo), |
|
822 |
"Precondition"); |
|
823 |
T heap_oop = oopDesc::load_heap_oop(p); |
|
824 |
if (!oopDesc::is_null(heap_oop)) { |
|
825 |
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
826 |
bool failed = false; |
|
827 |
if (!_g1h->is_in_closed_subset(obj) || _g1h->is_obj_dead_cond(obj, _vo)) { |
|
828 |
MutexLockerEx x(ParGCRareEvent_lock, |
|
829 |
Mutex::_no_safepoint_check_flag); |
|
830 |
||
831 |
if (!_failures) { |
|
832 |
gclog_or_tty->print_cr(""); |
|
833 |
gclog_or_tty->print_cr("----------"); |
|
834 |
} |
|
835 |
if (!_g1h->is_in_closed_subset(obj)) { |
|
836 |
HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); |
|
837 |
gclog_or_tty->print_cr("Field "PTR_FORMAT |
|
838 |
" of live obj "PTR_FORMAT" in region " |
|
839 |
"["PTR_FORMAT", "PTR_FORMAT")", |
|
840 |
p, (void*) _containing_obj, |
|
841 |
from->bottom(), from->end()); |
|
842 |
print_object(gclog_or_tty, _containing_obj); |
|
843 |
gclog_or_tty->print_cr("points to obj "PTR_FORMAT" not in the heap", |
|
844 |
(void*) obj); |
|
845 |
} else { |
|
846 |
HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); |
|
847 |
HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj); |
|
848 |
gclog_or_tty->print_cr("Field "PTR_FORMAT |
|
849 |
" of live obj "PTR_FORMAT" in region " |
|
850 |
"["PTR_FORMAT", "PTR_FORMAT")", |
|
851 |
p, (void*) _containing_obj, |
|
852 |
from->bottom(), from->end()); |
|
853 |
print_object(gclog_or_tty, _containing_obj); |
|
854 |
gclog_or_tty->print_cr("points to dead obj "PTR_FORMAT" in region " |
|
855 |
"["PTR_FORMAT", "PTR_FORMAT")", |
|
856 |
(void*) obj, to->bottom(), to->end()); |
|
857 |
print_object(gclog_or_tty, obj); |
|
858 |
} |
|
859 |
gclog_or_tty->print_cr("----------"); |
|
860 |
gclog_or_tty->flush(); |
|
861 |
_failures = true; |
|
862 |
failed = true; |
|
863 |
_n_failures++; |
|
864 |
} |
|
865 |
||
866 |
if (!_g1h->full_collection() || G1VerifyRSetsDuringFullGC) { |
|
867 |
HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); |
|
868 |
HeapRegion* to = _g1h->heap_region_containing(obj); |
|
869 |
if (from != NULL && to != NULL && |
|
870 |
from != to && |
|
871 |
!to->isHumongous()) { |
|
872 |
jbyte cv_obj = *_bs->byte_for_const(_containing_obj); |
|
873 |
jbyte cv_field = *_bs->byte_for_const(p); |
|
874 |
const jbyte dirty = CardTableModRefBS::dirty_card_val(); |
|
875 |
||
876 |
bool is_bad = !(from->is_young() |
|
877 |
|| to->rem_set()->contains_reference(p) |
|
878 |
|| !G1HRRSFlushLogBuffersOnVerify && // buffers were not flushed |
|
879 |
(_containing_obj->is_objArray() ? |
|
880 |
cv_field == dirty |
|
881 |
: cv_obj == dirty || cv_field == dirty)); |
|
882 |
if (is_bad) { |
|
883 |
MutexLockerEx x(ParGCRareEvent_lock, |
|
884 |
Mutex::_no_safepoint_check_flag); |
|
885 |
||
886 |
if (!_failures) { |
|
887 |
gclog_or_tty->print_cr(""); |
|
888 |
gclog_or_tty->print_cr("----------"); |
|
889 |
} |
|
890 |
gclog_or_tty->print_cr("Missing rem set entry:"); |
|
891 |
gclog_or_tty->print_cr("Field "PTR_FORMAT" " |
|
892 |
"of obj "PTR_FORMAT", " |
|
893 |
"in region "HR_FORMAT, |
|
894 |
p, (void*) _containing_obj, |
|
895 |
HR_FORMAT_PARAMS(from)); |
|
896 |
_containing_obj->print_on(gclog_or_tty); |
|
897 |
gclog_or_tty->print_cr("points to obj "PTR_FORMAT" " |
|
898 |
"in region "HR_FORMAT, |
|
899 |
(void*) obj, |
|
900 |
HR_FORMAT_PARAMS(to)); |
|
901 |
obj->print_on(gclog_or_tty); |
|
902 |
gclog_or_tty->print_cr("Obj head CTE = %d, field CTE = %d.", |
|
903 |
cv_obj, cv_field); |
|
904 |
gclog_or_tty->print_cr("----------"); |
|
905 |
gclog_or_tty->flush(); |
|
906 |
_failures = true; |
|
907 |
if (!failed) _n_failures++; |
|
908 |
} |
|
909 |
} |
|
910 |
} |
|
911 |
} |
|
912 |
} |
|
913 |
}; |
|
3000 | 914 |
|
1374 | 915 |
// This really ought to be commoned up into OffsetTableContigSpace somehow. |
916 |
// We would need a mechanism to make that code skip dead objects. |
|
917 |
||
12379 | 918 |
void HeapRegion::verify(VerifyOption vo, |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
919 |
bool* failures) const { |
1374 | 920 |
G1CollectedHeap* g1 = G1CollectedHeap::heap(); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
921 |
*failures = false; |
1374 | 922 |
HeapWord* p = bottom(); |
923 |
HeapWord* prev_p = NULL; |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
924 |
VerifyLiveClosure vl_cl(g1, vo); |
6260
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
925 |
bool is_humongous = isHumongous(); |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
926 |
bool do_bot_verify = !is_young(); |
6260
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
927 |
size_t object_num = 0; |
1374 | 928 |
while (p < top()) { |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
929 |
oop obj = oop(p); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
930 |
size_t obj_size = obj->size(); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
931 |
object_num += 1; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
932 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
933 |
if (is_humongous != g1->isHumongous(obj_size)) { |
6260
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
934 |
gclog_or_tty->print_cr("obj "PTR_FORMAT" is of %shumongous size (" |
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
935 |
SIZE_FORMAT" words) in a %shumongous region", |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
936 |
p, g1->isHumongous(obj_size) ? "" : "non-", |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
937 |
obj_size, is_humongous ? "" : "non-"); |
6260
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
938 |
*failures = true; |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
939 |
return; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
940 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
941 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
942 |
// If it returns false, verify_for_object() will output the |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
943 |
// appropriate messasge. |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
944 |
if (do_bot_verify && !_offsets.verify_for_object(p, obj_size)) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
945 |
*failures = true; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
946 |
return; |
6260
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
947 |
} |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
948 |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
949 |
if (!g1->is_obj_dead_cond(obj, this, vo)) { |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
950 |
if (obj->is_oop()) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13482
diff
changeset
|
951 |
Klass* klass = obj->klass(); |
18439 | 952 |
if (!klass->is_metaspace_object()) { |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
953 |
gclog_or_tty->print_cr("klass "PTR_FORMAT" of object "PTR_FORMAT" " |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13482
diff
changeset
|
954 |
"not metadata", klass, obj); |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
955 |
*failures = true; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
956 |
return; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
957 |
} else if (!klass->is_klass()) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
958 |
gclog_or_tty->print_cr("klass "PTR_FORMAT" of object "PTR_FORMAT" " |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
959 |
"not a klass", klass, obj); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
960 |
*failures = true; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
961 |
return; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
962 |
} else { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
963 |
vl_cl.set_containing_obj(obj); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13482
diff
changeset
|
964 |
obj->oop_iterate_no_header(&vl_cl); |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
965 |
if (vl_cl.failures()) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
966 |
*failures = true; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
967 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
968 |
if (G1MaxVerifyFailures >= 0 && |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
969 |
vl_cl.n_failures() >= G1MaxVerifyFailures) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
970 |
return; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
971 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
972 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
973 |
} else { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
974 |
gclog_or_tty->print_cr(PTR_FORMAT" no an oop", obj); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
975 |
*failures = true; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
976 |
return; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
977 |
} |
1374 | 978 |
} |
979 |
prev_p = p; |
|
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
980 |
p += obj_size; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
981 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
982 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
983 |
if (p != top()) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
984 |
gclog_or_tty->print_cr("end of last object "PTR_FORMAT" " |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
985 |
"does not match top "PTR_FORMAT, p, top()); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
986 |
*failures = true; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
987 |
return; |
1374 | 988 |
} |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
989 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
990 |
HeapWord* the_end = end(); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
991 |
assert(p == top(), "it should still hold"); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
992 |
// Do some extra BOT consistency checking for addresses in the |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
993 |
// range [top, end). BOT look-ups in this range should yield |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
994 |
// top. No point in doing that if top == end (there's nothing there). |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
995 |
if (p < the_end) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
996 |
// Look up top |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
997 |
HeapWord* addr_1 = p; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
998 |
HeapWord* b_start_1 = _offsets.block_start_const(addr_1); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
999 |
if (b_start_1 != p) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1000 |
gclog_or_tty->print_cr("BOT look up for top: "PTR_FORMAT" " |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1001 |
" yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1002 |
addr_1, b_start_1, p); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1003 |
*failures = true; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1004 |
return; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1005 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1006 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1007 |
// Look up top + 1 |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1008 |
HeapWord* addr_2 = p + 1; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1009 |
if (addr_2 < the_end) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1010 |
HeapWord* b_start_2 = _offsets.block_start_const(addr_2); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1011 |
if (b_start_2 != p) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1012 |
gclog_or_tty->print_cr("BOT look up for top + 1: "PTR_FORMAT" " |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1013 |
" yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1014 |
addr_2, b_start_2, p); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
1015 |
*failures = true; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
1016 |
return; |
7904
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1017 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1018 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1019 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1020 |
// Look up an address between top and end |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1021 |
size_t diff = pointer_delta(the_end, p) / 2; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1022 |
HeapWord* addr_3 = p + diff; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1023 |
if (addr_3 < the_end) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1024 |
HeapWord* b_start_3 = _offsets.block_start_const(addr_3); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1025 |
if (b_start_3 != p) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1026 |
gclog_or_tty->print_cr("BOT look up for top + diff: "PTR_FORMAT" " |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1027 |
" yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1028 |
addr_3, b_start_3, p); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1029 |
*failures = true; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1030 |
return; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1031 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1032 |
} |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1033 |
|
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1034 |
// Loook up end - 1 |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1035 |
HeapWord* addr_4 = the_end - 1; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1036 |
HeapWord* b_start_4 = _offsets.block_start_const(addr_4); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1037 |
if (b_start_4 != p) { |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1038 |
gclog_or_tty->print_cr("BOT look up for end - 1: "PTR_FORMAT" " |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1039 |
" yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1040 |
addr_4, b_start_4, p); |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1041 |
*failures = true; |
e90e097fced4
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
7397
diff
changeset
|
1042 |
return; |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
1043 |
} |
1374 | 1044 |
} |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
1045 |
|
6260
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
1046 |
if (is_humongous && object_num > 1) { |
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
1047 |
gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] is humongous " |
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
1048 |
"but has "SIZE_FORMAT", objects", |
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
1049 |
bottom(), end(), object_num); |
fba83fd3adc7
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
6247
diff
changeset
|
1050 |
*failures = true; |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
3697
diff
changeset
|
1051 |
return; |
1374 | 1052 |
} |
19339 | 1053 |
|
1054 |
verify_strong_code_roots(vo, failures); |
|
1055 |
} |
|
1056 |
||
1057 |
void HeapRegion::verify() const { |
|
1058 |
bool dummy = false; |
|
1059 |
verify(VerifyOption_G1UsePrevMarking, /* failures */ &dummy); |
|
1374 | 1060 |
} |
1061 |
||
1062 |
// G1OffsetTableContigSpace code; copied from space.cpp. Hope this can go |
|
1063 |
// away eventually. |
|
1064 |
||
1388 | 1065 |
void G1OffsetTableContigSpace::clear(bool mangle_space) { |
1066 |
ContiguousSpace::clear(mangle_space); |
|
1374 | 1067 |
_offsets.zero_bottom_entry(); |
1068 |
_offsets.initialize_threshold(); |
|
1069 |
} |
|
1070 |
||
1071 |
void G1OffsetTableContigSpace::set_bottom(HeapWord* new_bottom) { |
|
1072 |
Space::set_bottom(new_bottom); |
|
1073 |
_offsets.set_bottom(new_bottom); |
|
1074 |
} |
|
1075 |
||
1076 |
void G1OffsetTableContigSpace::set_end(HeapWord* new_end) { |
|
1077 |
Space::set_end(new_end); |
|
1078 |
_offsets.resize(new_end - bottom()); |
|
1079 |
} |
|
1080 |
||
1081 |
void G1OffsetTableContigSpace::print() const { |
|
1082 |
print_short(); |
|
1083 |
gclog_or_tty->print_cr(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " |
|
1084 |
INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
1085 |
bottom(), top(), _offsets.threshold(), end()); |
|
1086 |
} |
|
1087 |
||
1088 |
HeapWord* G1OffsetTableContigSpace::initialize_threshold() { |
|
1089 |
return _offsets.initialize_threshold(); |
|
1090 |
} |
|
1091 |
||
1092 |
HeapWord* G1OffsetTableContigSpace::cross_threshold(HeapWord* start, |
|
1093 |
HeapWord* end) { |
|
1094 |
_offsets.alloc_block(start, end); |
|
1095 |
return _offsets.threshold(); |
|
1096 |
} |
|
1097 |
||
1098 |
HeapWord* G1OffsetTableContigSpace::saved_mark_word() const { |
|
1099 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
1100 |
assert( _gc_time_stamp <= g1h->get_gc_time_stamp(), "invariant" ); |
|
1101 |
if (_gc_time_stamp < g1h->get_gc_time_stamp()) |
|
1102 |
return top(); |
|
1103 |
else |
|
1104 |
return ContiguousSpace::saved_mark_word(); |
|
1105 |
} |
|
1106 |
||
1107 |
void G1OffsetTableContigSpace::set_saved_mark() { |
|
1108 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
1109 |
unsigned curr_gc_time_stamp = g1h->get_gc_time_stamp(); |
|
1110 |
||
1111 |
if (_gc_time_stamp < curr_gc_time_stamp) { |
|
1112 |
// The order of these is important, as another thread might be |
|
1113 |
// about to start scanning this region. If it does so after |
|
1114 |
// set_saved_mark and before _gc_time_stamp = ..., then the latter |
|
1115 |
// will be false, and it will pick up top() as the high water mark |
|
1116 |
// of region. If it does so after _gc_time_stamp = ..., then it |
|
1117 |
// will pick up the right saved_mark_word() as the high water mark |
|
1118 |
// of the region. Either way, the behaviour will be correct. |
|
1119 |
ContiguousSpace::set_saved_mark(); |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
1120 |
OrderAccess::storestore(); |
1385
1751733b089b
6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!)
iveresov
parents:
1374
diff
changeset
|
1121 |
_gc_time_stamp = curr_gc_time_stamp; |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
7923
diff
changeset
|
1122 |
// No need to do another barrier to flush the writes above. If |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
7923
diff
changeset
|
1123 |
// this is called in parallel with other threads trying to |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
7923
diff
changeset
|
1124 |
// allocate into the region, the caller should call this while |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
7923
diff
changeset
|
1125 |
// holding a lock and when the lock is released the writes will be |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
7923
diff
changeset
|
1126 |
// flushed. |
1374 | 1127 |
} |
1128 |
} |
|
1129 |
||
1130 |
G1OffsetTableContigSpace:: |
|
1131 |
G1OffsetTableContigSpace(G1BlockOffsetSharedArray* sharedOffsetArray, |
|
13756
3b72f3da8cd4
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
13728
diff
changeset
|
1132 |
MemRegion mr) : |
1374 | 1133 |
_offsets(sharedOffsetArray, mr), |
1134 |
_par_alloc_lock(Mutex::leaf, "OffsetTableContigSpace par alloc lock", true), |
|
1135 |
_gc_time_stamp(0) |
|
1136 |
{ |
|
1137 |
_offsets.set_space(this); |
|
13756
3b72f3da8cd4
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
13728
diff
changeset
|
1138 |
// false ==> we'll do the clearing if there's clearing to be done. |
3b72f3da8cd4
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
13728
diff
changeset
|
1139 |
ContiguousSpace::initialize(mr, false, SpaceDecorator::Mangle); |
3b72f3da8cd4
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
13728
diff
changeset
|
1140 |
_offsets.zero_bottom_entry(); |
3b72f3da8cd4
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
13728
diff
changeset
|
1141 |
_offsets.initialize_threshold(); |
1374 | 1142 |
} |