Quellcode-Bibliothek

^© Kompilation durch diese Firma

[Weder Korrektheit noch Funktionsfähigkeit der Software werden zugesichert.]

Datei: zRootsIterator.cpp Sprache: C

/*
* Copyright (c) 2015, 2020, 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 "classfile/classLoaderDataGraph.hpp"
#include "gc/shared/oopStorageSetParState.inline.hpp"
#include "gc/z/zNMethod.hpp"
#include "gc/z/zNMethodTable.hpp"
#include "gc/z/zRootsIterator.hpp"
#include "gc/z/zStat.hpp"
#include "memory/resourceArea.hpp"
#include "prims/jvmtiTagMap.hpp"
#include "runtime/atomic.hpp"
#include "runtime/globals.hpp"
#include "runtime/safepoint.hpp"
#include "utilities/debug.hpp"

static const ZStatSubPhase ZSubPhaseConcurrentRootsOopStorageSet("Concurrent Roots OopStorageSet");
static const ZStatSubPhase ZSubPhaseConcurrentRootsClassLoaderDataGraph("Concurrent Roots ClassLoaderDataGraph");
static const ZStatSubPhase ZSubPhaseConcurrentRootsJavaThreads("Concurrent Roots JavaThreads");
static const ZStatSubPhase ZSubPhaseConcurrentRootsCodeCache("Concurrent Roots CodeCache");
static const ZStatSubPhase ZSubPhaseConcurrentWeakRootsOopStorageSet("Concurrent Weak Roots OopStorageSet");

template <typename Iterator>
template <typename ClosureType>
void ZParallelApply<Iterator>::apply(ClosureType* cl) {
  if (!Atomic::load(&_completed)) {
    _iter.apply(cl);
    if (!Atomic::load(&_completed)) {
      Atomic::store(&_completed, true);
    }
  }
}

ZStrongOopStorageSetIterator::ZStrongOopStorageSetIterator() :
    _iter() {}

void ZStrongOopStorageSetIterator::apply(OopClosure* cl) {
  ZStatTimer timer(ZSubPhaseConcurrentRootsOopStorageSet);
  _iter.oops_do(cl);
}

void ZStrongCLDsIterator::apply(CLDClosure* cl) {
  ZStatTimer timer(ZSubPhaseConcurrentRootsClassLoaderDataGraph);
  ClassLoaderDataGraph::always_strong_cld_do(cl);
}

ZJavaThreadsIterator::ZJavaThreadsIterator() :
    _threads(),
    _claimed(0) {}

uint ZJavaThreadsIterator::claim() {
  return Atomic::fetch_and_add(&_claimed, 1u);
}

void ZJavaThreadsIterator::apply(ThreadClosure* cl) {
  ZStatTimer timer(ZSubPhaseConcurrentRootsJavaThreads);

  // The resource mark is needed because interpreter oop maps are
  // not reused in concurrent mode. Instead, they are temporary and
  // resource allocated.
  ResourceMark                 _rm;

  for (uint i = claim(); i < _threads.length(); i = claim()) {
    cl->do_thread(_threads.thread_at(i));
  }
}

ZNMethodsIterator::ZNMethodsIterator() {
  if (!ClassUnloading) {
    ZNMethod::nmethods_do_begin();
  }
}

ZNMethodsIterator::~ZNMethodsIterator() {
  if (!ClassUnloading) {
    ZNMethod::nmethods_do_end();
  }
}

void ZNMethodsIterator::apply(NMethodClosure* cl) {
  ZStatTimer timer(ZSubPhaseConcurrentRootsCodeCache);
  ZNMethod::nmethods_do(cl);
}

ZRootsIterator::ZRootsIterator(int cld_claim) {
  if (cld_claim != ClassLoaderData::_claim_none) {
    ClassLoaderDataGraph::verify_claimed_marks_cleared(cld_claim);
  }
}

void ZRootsIterator::apply(OopClosure* cl,
                           CLDClosure* cld_cl,
                           ThreadClosure* thread_cl,
                           NMethodClosure* nm_cl) {
  _oop_storage_set.apply(cl);
  _class_loader_data_graph.apply(cld_cl);
  _java_threads.apply(thread_cl);
  if (!ClassUnloading) {
    _nmethods.apply(nm_cl);
  }
}

ZWeakOopStorageSetIterator::ZWeakOopStorageSetIterator() :
    _iter() {}

void ZWeakOopStorageSetIterator::apply(OopClosure* cl) {
  ZStatTimer timer(ZSubPhaseConcurrentWeakRootsOopStorageSet);
  _iter.oops_do(cl);
}

void ZWeakOopStorageSetIterator::report_num_dead() {
  _iter.report_num_dead();
}

void ZWeakRootsIterator::report_num_dead() {
  _oop_storage_set.iter().report_num_dead();
}

void ZWeakRootsIterator::apply(OopClosure* cl) {
  _oop_storage_set.apply(cl);
}

¤ Dauer der Verarbeitung: 0.4 Sekunden (vorverarbeitet) ¤

Download des Quellennavigators
Download des sprechenden Kalenders
in der Quellcodebibliothek suchen

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.