| /* |
| * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "code/nmethod.hpp" |
| #include "gc/g1/g1CodeBlobClosure.hpp" |
| #include "gc/g1/g1CollectedHeap.inline.hpp" |
| #include "gc/g1/g1ConcurrentMark.inline.hpp" |
| #include "gc/g1/heapRegion.hpp" |
| #include "gc/g1/heapRegionRemSet.hpp" |
| #include "oops/access.inline.hpp" |
| #include "oops/compressedOops.inline.hpp" |
| #include "oops/oop.inline.hpp" |
| |
| template <typename T> |
| void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop_work(T* p) { |
| _work->do_oop(p); |
| T oop_or_narrowoop = RawAccess<>::oop_load(p); |
| if (!CompressedOops::is_null(oop_or_narrowoop)) { |
| oop o = CompressedOops::decode_not_null(oop_or_narrowoop); |
| HeapRegion* hr = _g1h->heap_region_containing(o); |
| assert(!_g1h->is_in_cset(o) || hr->rem_set()->strong_code_roots_list_contains(_nm), "if o still in collection set then evacuation failed and nm must already be in the remset"); |
| hr->add_strong_code_root(_nm); |
| } |
| } |
| |
| void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop(oop* o) { |
| do_oop_work(o); |
| } |
| |
| void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop(narrowOop* o) { |
| do_oop_work(o); |
| } |
| |
| template<typename T> |
| void G1CodeBlobClosure::MarkingOopClosure::do_oop_work(T* p) { |
| T oop_or_narrowoop = RawAccess<>::oop_load(p); |
| if (!CompressedOops::is_null(oop_or_narrowoop)) { |
| oop o = CompressedOops::decode_not_null(oop_or_narrowoop); |
| _cm->mark_in_next_bitmap(_worker_id, o); |
| } |
| } |
| |
| G1CodeBlobClosure::MarkingOopClosure::MarkingOopClosure(uint worker_id) : |
| _cm(G1CollectedHeap::heap()->concurrent_mark()), _worker_id(worker_id) { } |
| |
| void G1CodeBlobClosure::MarkingOopClosure::do_oop(oop* o) { |
| do_oop_work(o); |
| } |
| |
| void G1CodeBlobClosure::MarkingOopClosure::do_oop(narrowOop* o) { |
| do_oop_work(o); |
| } |
| |
| void G1CodeBlobClosure::do_evacuation_and_fixup(nmethod* nm) { |
| _oc.set_nm(nm); |
| nm->oops_do(&_oc); |
| nm->fix_oop_relocations(); |
| } |
| |
| void G1CodeBlobClosure::do_marking(nmethod* nm) { |
| nm->oops_do(&_marking_oc); |
| } |
| |
| class G1NmethodProcessor : public nmethod::OopsDoProcessor { |
| G1CodeBlobClosure* _cl; |
| |
| public: |
| G1NmethodProcessor(G1CodeBlobClosure* cl) : _cl(cl) { } |
| |
| void do_regular_processing(nmethod* nm) { |
| _cl->do_evacuation_and_fixup(nm); |
| } |
| |
| void do_remaining_strong_processing(nmethod* nm) { |
| _cl->do_marking(nm); |
| } |
| }; |
| |
| void G1CodeBlobClosure::do_code_blob(CodeBlob* cb) { |
| nmethod* nm = cb->as_nmethod_or_null(); |
| if (nm == NULL) { |
| return; |
| } |
| |
| G1NmethodProcessor cl(this); |
| |
| if (_strong) { |
| nm->oops_do_process_strong(&cl); |
| } else { |
| nm->oops_do_process_weak(&cl); |
| } |
| } |