/*

 * Copyright (c) 1997, 2010, 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 "memory/iterator.hpp"

#include "oops/oop.inline.hpp"

#ifdef ASSERT

bool OopClosure::_must_remember_klasses = false;

#endif

void ObjectToOopClosure::do_object(oop obj) {

  obj->oop_iterate(_cl);

}

void VoidClosure::do_void() {

  ShouldNotCallThis();

}

#ifdef ASSERT

bool OopClosure::must_remember_klasses() {

  return _must_remember_klasses;

}

void OopClosure::set_must_remember_klasses(bool v) {

  _must_remember_klasses = v;

}

#endif

MarkingCodeBlobClosure::MarkScope::MarkScope(bool activate)

  : _active(activate)

{

  if (_active)  nmethod::oops_do_marking_prologue();

}

MarkingCodeBlobClosure::MarkScope::~MarkScope() {

  if (_active)  nmethod::oops_do_marking_epilogue();

}

void MarkingCodeBlobClosure::do_code_blob(CodeBlob* cb) {

  nmethod* nm = cb->as_nmethod_or_null();

  if (nm == NULL)  return;

  if (!nm->test_set_oops_do_mark()) {

    NOT_PRODUCT(if (TraceScavenge)  nm->print_on(tty, "oops_do, 1st visit\n"));

    do_newly_marked_nmethod(nm);

  } else {

    NOT_PRODUCT(if (TraceScavenge)  nm->print_on(tty, "oops_do, skipped on 2nd visit\n"));

  }

}

void CodeBlobToOopClosure::do_newly_marked_nmethod(nmethod* nm) {

  nm->oops_do(_cl, /*do_strong_roots_only=*/ true);

}

void CodeBlobToOopClosure::do_code_blob(CodeBlob* cb) {

  if (!_do_marking) {

    nmethod* nm = cb->as_nmethod_or_null();

    NOT_PRODUCT(if (TraceScavenge && Verbose && nm != NULL)  nm->print_on(tty, "oops_do, unmarked visit\n"));

    // This assert won't work, since there are lots of mini-passes

    // (mostly in debug mode) that co-exist with marking phases.

    //assert(!(cb->is_nmethod() && ((nmethod*)cb)->test_oops_do_mark()), "found marked nmethod during mark-free phase");

    if (nm != NULL) {

      nm->oops_do(_cl);

    }

  } else {

    MarkingCodeBlobClosure::do_code_blob(cb);

  }

}