| /* |
| * Copyright (c) 2019, Red Hat, Inc. All rights reserved. |
| * |
| * 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. |
| * |
| */ |
| |
| #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP |
| #define SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP |
| |
| #include "gc/shenandoah/shenandoahHeuristics.hpp" |
| #include "gc/shenandoah/shenandoahRootProcessor.hpp" |
| #include "gc/shenandoah/shenandoahTimingTracker.hpp" |
| #include "gc/shenandoah/shenandoahUtils.hpp" |
| #include "memory/resourceArea.hpp" |
| |
| template <typename IsAlive, typename KeepAlive> |
| void ShenandoahWeakRoots::oops_do(IsAlive* is_alive, KeepAlive* keep_alive, uint worker_id) { |
| _task.work<IsAlive, KeepAlive>(worker_id, is_alive, keep_alive); |
| } |
| |
| template <typename ITR> |
| ShenandoahCodeCacheRoots<ITR>::ShenandoahCodeCacheRoots() { |
| nmethod::oops_do_marking_prologue(); |
| } |
| |
| template <typename ITR> |
| void ShenandoahCodeCacheRoots<ITR>::code_blobs_do(CodeBlobClosure* blob_cl, uint worker_id) { |
| ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
| ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::CodeCacheRoots, worker_id); |
| _coderoots_iterator.possibly_parallel_blobs_do(blob_cl); |
| } |
| |
| template <typename ITR> |
| ShenandoahCodeCacheRoots<ITR>::~ShenandoahCodeCacheRoots() { |
| nmethod::oops_do_marking_epilogue(); |
| } |
| |
| class ShenandoahParallelOopsDoThreadClosure : public ThreadClosure { |
| private: |
| OopClosure* _f; |
| CodeBlobClosure* _cf; |
| ThreadClosure* _thread_cl; |
| public: |
| ShenandoahParallelOopsDoThreadClosure(OopClosure* f, CodeBlobClosure* cf, ThreadClosure* thread_cl) : |
| _f(f), _cf(cf), _thread_cl(thread_cl) {} |
| |
| void do_thread(Thread* t) { |
| if (_thread_cl != NULL) { |
| _thread_cl->do_thread(t); |
| } |
| t->oops_do(_f, _cf); |
| } |
| }; |
| |
| template <typename ITR> |
| ShenandoahRootScanner<ITR>::ShenandoahRootScanner(uint n_workers, ShenandoahPhaseTimings::Phase phase) : |
| ShenandoahRootProcessor(phase), |
| _thread_roots(n_workers > 1) { |
| } |
| |
| template <typename ITR> |
| void ShenandoahRootScanner<ITR>::roots_do(uint worker_id, OopClosure* oops) { |
| CLDToOopClosure clds_cl(oops, ClassLoaderData::_claim_strong); |
| MarkingCodeBlobClosure blobs_cl(oops, !CodeBlobToOopClosure::FixRelocations); |
| roots_do(worker_id, oops, &clds_cl, &blobs_cl); |
| } |
| |
| template <typename ITR> |
| void ShenandoahRootScanner<ITR>::strong_roots_do(uint worker_id, OopClosure* oops) { |
| CLDToOopClosure clds_cl(oops, ClassLoaderData::_claim_strong); |
| MarkingCodeBlobClosure blobs_cl(oops, !CodeBlobToOopClosure::FixRelocations); |
| strong_roots_do(worker_id, oops, &clds_cl, &blobs_cl); |
| } |
| |
| template <typename ITR> |
| void ShenandoahRootScanner<ITR>::roots_do(uint worker_id, OopClosure* oops, CLDClosure* clds, CodeBlobClosure* code, ThreadClosure *tc) { |
| assert(!ShenandoahSafepoint::is_at_shenandoah_safepoint() || |
| !ShenandoahHeap::heap()->unload_classes() || |
| ShenandoahHeap::heap()->heuristics()->can_do_traversal_gc(), |
| "Expect class unloading or traversal when Shenandoah cycle is running"); |
| ShenandoahParallelOopsDoThreadClosure tc_cl(oops, code, tc); |
| ResourceMark rm; |
| |
| _serial_roots.oops_do(oops, worker_id); |
| _cld_roots.clds_do(clds, clds, worker_id); |
| _thread_roots.threads_do(&tc_cl, worker_id); |
| |
| // With ShenandoahConcurrentScanCodeRoots, we avoid scanning the entire code cache here, |
| // and instead do that in concurrent phase under the relevant lock. This saves init mark |
| // pause time. |
| if (code != NULL && !ShenandoahConcurrentScanCodeRoots) { |
| _code_roots.code_blobs_do(code, worker_id); |
| } |
| } |
| |
| template <typename ITR> |
| void ShenandoahRootScanner<ITR>::roots_do_unchecked(OopClosure* oops) { |
| CLDToOopClosure clds(oops, ClassLoaderData::_claim_strong); |
| MarkingCodeBlobClosure code(oops, !CodeBlobToOopClosure::FixRelocations); |
| ShenandoahParallelOopsDoThreadClosure tc_cl(oops, &code, NULL); |
| ResourceMark rm; |
| |
| _serial_roots.oops_do(oops, 0); |
| _cld_roots.clds_do(&clds, &clds, 0); |
| _thread_roots.threads_do(&tc_cl, 0); |
| _code_roots.code_blobs_do(&code, 0); |
| } |
| |
| template <typename ITR> |
| void ShenandoahRootScanner<ITR>::strong_roots_do(uint worker_id, OopClosure* oops, CLDClosure* clds, CodeBlobClosure* code, ThreadClosure* tc) { |
| assert(ShenandoahHeap::heap()->unload_classes(), "Should be used during class unloading"); |
| ShenandoahParallelOopsDoThreadClosure tc_cl(oops, code, tc); |
| ResourceMark rm; |
| |
| _serial_roots.oops_do(oops, worker_id); |
| _cld_roots.clds_do(clds, NULL, worker_id); |
| _thread_roots.threads_do(&tc_cl, worker_id); |
| } |
| |
| template <typename IsAlive, typename KeepAlive> |
| void ShenandoahRootUpdater::roots_do(uint worker_id, IsAlive* is_alive, KeepAlive* keep_alive) { |
| CodeBlobToOopClosure update_blobs(keep_alive, CodeBlobToOopClosure::FixRelocations); |
| CLDToOopClosure clds(keep_alive, ClassLoaderData::_claim_strong); |
| CLDToOopClosure* weak_clds = ShenandoahHeap::heap()->unload_classes() ? NULL : &clds; |
| |
| _serial_roots.oops_do(keep_alive, worker_id); |
| |
| _thread_roots.oops_do(keep_alive, NULL, worker_id); |
| _cld_roots.clds_do(&clds, weak_clds, worker_id); |
| |
| if(_update_code_cache) { |
| _code_roots.code_blobs_do(&update_blobs, worker_id); |
| } |
| |
| _weak_roots.oops_do<IsAlive, KeepAlive>(is_alive, keep_alive, worker_id); |
| _dedup_roots.oops_do(is_alive, keep_alive, worker_id); |
| } |
| |
| #endif // SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP |