1 /*
   2  * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP
  25 #define SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP
  26 
  27 #include "gc_implementation/shenandoah/shenandoahPhaseTimings.hpp"
  28 #include "gc_implementation/shenandoah/shenandoahRootProcessor.hpp"
  29 #include "gc_implementation/shenandoah/shenandoahUtils.hpp"
  30 #include "memory/resourceArea.hpp"
  31 #include "runtime/safepoint.hpp"
  32 
  33 template <typename ITR>
  34 ShenandoahCodeCacheRoots<ITR>::ShenandoahCodeCacheRoots(ShenandoahPhaseTimings::Phase phase) :
  35   _phase(phase)
  36 {}
  37 
  38 template <typename ITR>
  39 void ShenandoahCodeCacheRoots<ITR>::code_blobs_do(CodeBlobClosure* blob_cl, uint worker_id) {
  40   ShenandoahWorkerTimingsTracker timer(_phase, ShenandoahPhaseTimings::CodeCacheRoots, worker_id);
  41   _coderoots_iterator.possibly_parallel_blobs_do(blob_cl);
  42 }
  43 
  44 template <typename ITR>
  45 ShenandoahRootScanner<ITR>::ShenandoahRootScanner(ShenandoahPhaseTimings::Phase phase) :
  46   ShenandoahRootProcessor(phase),
  47   _serial_roots(phase),
  48   _dict_roots(phase),
  49   _cld_roots(phase),
  50   _thread_roots(phase),
  51   _weak_roots(phase),
  52   _dedup_roots(phase),
  53   _string_table_roots(phase),
  54   _code_roots(phase)
  55 { }
  56 
  57 template <typename ITR>
  58 void ShenandoahRootScanner<ITR>::roots_do(uint worker_id, OopClosure* oops) {
  59   CLDToOopClosure clds_cl(oops);
  60   MarkingCodeBlobClosure blobs_cl(oops, !CodeBlobToOopClosure::FixRelocations);
  61   roots_do(worker_id, oops, &clds_cl, &blobs_cl);
  62 }
  63 
  64 template <typename ITR>
  65 void ShenandoahRootScanner<ITR>::strong_roots_do(uint worker_id, OopClosure* oops) {
  66   CLDToOopClosure clds_cl(oops);
  67   MarkingCodeBlobClosure blobs_cl(oops, !CodeBlobToOopClosure::FixRelocations);
  68   strong_roots_do(worker_id, oops, &clds_cl, &blobs_cl);
  69 }
  70 
  71 template <typename ITR>
  72 void ShenandoahRootScanner<ITR>::roots_do(uint worker_id, OopClosure* oops, CLDClosure* clds, CodeBlobClosure* code) {
  73   assert(!ShenandoahHeap::heap()->unload_classes(),
  74          "No class unloading");
  75   ResourceMark rm;
  76   _serial_roots.oops_do(oops, worker_id);
  77   _dict_roots.oops_do(oops, worker_id);
  78   _thread_roots.oops_do(oops, clds, code, worker_id);
  79   _cld_roots.cld_do(clds, worker_id);
  80   _weak_roots.oops_do(oops, worker_id);
  81   _string_table_roots.oops_do(oops, worker_id);
  82   _dedup_roots.oops_do(oops, worker_id);
  83 }
  84 
  85 template <typename ITR>
  86 void ShenandoahRootScanner<ITR>::strong_roots_do(uint worker_id, OopClosure* oops, CLDClosure* clds, CodeBlobClosure* code) {
  87   assert(ShenandoahHeap::heap()->unload_classes(), "Should be used during class unloading");
  88   ResourceMark rm;
  89   AlwaysTrueClosure always_true;
  90 
  91   _serial_roots.oops_do(oops, worker_id);
  92   _dict_roots.strong_oops_do(oops, worker_id);
  93   _cld_roots.always_strong_cld_do(clds, worker_id);
  94   _thread_roots.oops_do(oops, clds, code, worker_id);
  95 }
  96 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP