author | eosterlund |
Tue, 16 Oct 2018 13:18:22 +0200 | |
changeset 52142 | ca0c25e01c5b |
parent 50752 | 9d62da00bf15 |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2018, 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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#ifndef SHARE_VM_GC_SHARED_GENOOPCLOSURES_INLINE_HPP |
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#define SHARE_VM_GC_SHARED_GENOOPCLOSURES_INLINE_HPP |
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#include "gc/shared/cardTableRS.hpp" |
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#include "gc/shared/genCollectedHeap.hpp" |
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#include "gc/shared/genOopClosures.hpp" |
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#include "gc/shared/generation.hpp" |
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#include "gc/shared/space.hpp" |
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#include "oops/access.inline.hpp" |
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#include "oops/compressedOops.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#if INCLUDE_SERIALGC |
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#include "gc/serial/defNewGeneration.inline.hpp" |
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#endif |
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inline OopsInGenClosure::OopsInGenClosure(Generation* gen) : |
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OopIterateClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) { |
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set_generation(gen); |
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} |
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inline void OopsInGenClosure::set_generation(Generation* gen) { |
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_gen = gen; |
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_gen_boundary = _gen->reserved().start(); |
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// Barrier set for the heap, must be set after heap is initialized |
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if (_rs == NULL) { |
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_rs = GenCollectedHeap::heap()->rem_set(); |
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} |
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} |
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template <class T> inline void OopsInGenClosure::do_barrier(T* p) { |
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assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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T heap_oop = RawAccess<>::oop_load(p); |
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assert(!CompressedOops::is_null(heap_oop), "expected non-null oop"); |
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oop obj = CompressedOops::decode_not_null(heap_oop); |
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// If p points to a younger generation, mark the card. |
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if ((HeapWord*)obj < _gen_boundary) { |
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_rs->inline_write_ref_field_gc(p, obj); |
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} |
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} |
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template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) { |
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assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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T heap_oop = RawAccess<>::oop_load(p); |
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assert(!CompressedOops::is_null(heap_oop), "expected non-null oop"); |
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oop obj = CompressedOops::decode_not_null(heap_oop); |
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// If p points to a younger generation, mark the card. |
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if ((HeapWord*)obj < gen_boundary()) { |
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rs()->write_ref_field_gc_par(p, obj); |
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} |
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} |
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inline BasicOopsInGenClosure::BasicOopsInGenClosure(Generation* gen) : OopsInGenClosure(gen) { |
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} |
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inline void OopsInClassLoaderDataOrGenClosure::do_cld_barrier() { |
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assert(_scanned_cld != NULL, "Must be"); |
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if (!_scanned_cld->has_modified_oops()) { |
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_scanned_cld->record_modified_oops(); |
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} |
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} |
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#if INCLUDE_SERIALGC |
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// NOTE! Any changes made here should also be made |
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// in FastScanClosure::do_oop_work() |
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template <class T> inline void ScanClosure::do_oop_work(T* p) { |
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T heap_oop = RawAccess<>::oop_load(p); |
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// Should we copy the obj? |
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if (!CompressedOops::is_null(heap_oop)) { |
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oop obj = CompressedOops::decode_not_null(heap_oop); |
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if ((HeapWord*)obj < _boundary) { |
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assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); |
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oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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: _g->copy_to_survivor_space(obj); |
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RawAccess<IS_NOT_NULL>::oop_store(p, new_obj); |
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} |
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if (is_scanning_a_cld()) { |
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do_cld_barrier(); |
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} else if (_gc_barrier) { |
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// Now call parent closure |
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do_barrier(p); |
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} |
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} |
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} |
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inline void ScanClosure::do_oop(oop* p) { ScanClosure::do_oop_work(p); } |
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inline void ScanClosure::do_oop(narrowOop* p) { ScanClosure::do_oop_work(p); } |
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// NOTE! Any changes made here should also be made |
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// in ScanClosure::do_oop_work() |
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template <class T> inline void FastScanClosure::do_oop_work(T* p) { |
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T heap_oop = RawAccess<>::oop_load(p); |
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// Should we copy the obj? |
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if (!CompressedOops::is_null(heap_oop)) { |
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oop obj = CompressedOops::decode_not_null(heap_oop); |
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if ((HeapWord*)obj < _boundary) { |
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assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); |
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oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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: _g->copy_to_survivor_space(obj); |
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RawAccess<IS_NOT_NULL>::oop_store(p, new_obj); |
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if (is_scanning_a_cld()) { |
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do_cld_barrier(); |
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} else if (_gc_barrier) { |
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// Now call parent closure |
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do_barrier(p); |
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} |
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} |
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} |
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} |
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inline void FastScanClosure::do_oop(oop* p) { FastScanClosure::do_oop_work(p); } |
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inline void FastScanClosure::do_oop(narrowOop* p) { FastScanClosure::do_oop_work(p); } |
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#endif // INCLUDE_SERIALGC |
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template <class T> void FilteringClosure::do_oop_work(T* p) { |
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T heap_oop = RawAccess<>::oop_load(p); |
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if (!CompressedOops::is_null(heap_oop)) { |
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oop obj = CompressedOops::decode_not_null(heap_oop); |
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if ((HeapWord*)obj < _boundary) { |
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_cl->do_oop(p); |
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} |
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} |
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} |
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inline void FilteringClosure::do_oop(oop* p) { FilteringClosure::do_oop_work(p); } |
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inline void FilteringClosure::do_oop(narrowOop* p) { FilteringClosure::do_oop_work(p); } |
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#if INCLUDE_SERIALGC |
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// Note similarity to ScanClosure; the difference is that |
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// the barrier set is taken care of outside this closure. |
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template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) { |
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oop obj = RawAccess<IS_NOT_NULL>::oop_load(p); |
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// weak references are sometimes scanned twice; must check |
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// that to-space doesn't already contain this object |
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if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { |
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oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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: _g->copy_to_survivor_space(obj); |
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RawAccess<IS_NOT_NULL>::oop_store(p, new_obj); |
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} |
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} |
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inline void ScanWeakRefClosure::do_oop(oop* p) { ScanWeakRefClosure::do_oop_work(p); } |
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inline void ScanWeakRefClosure::do_oop(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); } |
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#endif // INCLUDE_SERIALGC |
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#endif // SHARE_VM_GC_SHARED_GENOOPCLOSURES_INLINE_HPP |