/*

 * Copyright (c) 2000, 2011, 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 "gc_implementation/shared/markSweep.inline.hpp"

#include "gc_interface/collectedHeap.inline.hpp"

#include "memory/gcLocker.hpp"

#include "memory/resourceArea.hpp"

#include "memory/universe.inline.hpp"

#include "oops/klassOop.hpp"

#include "oops/methodDataKlass.hpp"

#include "oops/methodDataOop.hpp"

#include "oops/oop.inline.hpp"

#include "oops/oop.inline2.hpp"

#include "runtime/handles.inline.hpp"

#ifndef SERIALGC

#include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"

#include "oops/oop.pcgc.inline.hpp"

#endif

klassOop methodDataKlass::create_klass(TRAPS) {

  methodDataKlass o;

  KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());

  KlassHandle k = base_create_klass(h_this_klass, header_size(),

                                    o.vtbl_value(), CHECK_NULL);

  // Make sure size calculation is right

  assert(k()->size() == align_object_size(header_size()),

         "wrong size for object");

  return k();

}

int methodDataKlass::oop_size(oop obj) const {

  assert(obj->is_methodData(), "must be method data oop");

  return methodDataOop(obj)->object_size();

}

bool methodDataKlass::oop_is_parsable(oop obj) const {

  assert(obj->is_methodData(), "must be method data oop");

  return methodDataOop(obj)->object_is_parsable();

}

methodDataOop methodDataKlass::allocate(methodHandle method, TRAPS) {

  int size = methodDataOopDesc::compute_allocation_size_in_words(method);

  KlassHandle h_k(THREAD, as_klassOop());

  methodDataOop mdo =

    (methodDataOop)CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL);

  assert(!mdo->is_parsable(), "not expecting parsability yet.");

  No_Safepoint_Verifier no_safepoint;  // init function atomic wrt GC

  mdo->initialize(method);

  assert(mdo->is_parsable(), "should be parsable here.");

  assert(size == mdo->object_size(), "wrong size for methodDataOop");

  return mdo;

}

void methodDataKlass::oop_follow_contents(oop obj) {

  assert (obj->is_methodData(), "object must be method data");

  methodDataOop m = methodDataOop(obj);

  obj->follow_header();

  MarkSweep::mark_and_push(m->adr_method());

  ResourceMark rm;

  for (ProfileData* data = m->first_data();

       m->is_valid(data);

       data = m->next_data(data)) {

    data->follow_contents();

  }

}

#ifndef SERIALGC

void methodDataKlass::oop_follow_contents(ParCompactionManager* cm,

                                          oop obj) {

  assert (obj->is_methodData(), "object must be method data");

  methodDataOop m = methodDataOop(obj);

  obj->follow_header(cm);

  PSParallelCompact::mark_and_push(cm, m->adr_method());

  ResourceMark rm;

  for (ProfileData* data = m->first_data();

       m->is_valid(data);

       data = m->next_data(data)) {

    data->follow_contents(cm);

  }

}

#endif // SERIALGC

int methodDataKlass::oop_oop_iterate(oop obj, OopClosure* blk) {

  assert (obj->is_methodData(), "object must be method data");

  methodDataOop m = methodDataOop(obj);

  // Get size before changing pointers

  // Don't call size() or oop_size() since that is a virtual call.

  int size = m->object_size();

  obj->oop_iterate_header(blk);

  blk->do_oop(m->adr_method());

  ResourceMark rm;

  for (ProfileData* data = m->first_data();

       m->is_valid(data);

       data = m->next_data(data)) {

    data->oop_iterate(blk);

  }

  return size;

}

int methodDataKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {

  assert (obj->is_methodData(), "object must be method data");

  methodDataOop m = methodDataOop(obj);

  // Get size before changing pointers

  // Don't call size() or oop_size() since that is a virtual call.

  int size = m->object_size();

  obj->oop_iterate_header(blk, mr);

  oop* adr = m->adr_method();

  if (mr.contains(adr)) {

    blk->do_oop(m->adr_method());

  }

  ResourceMark rm;

  for (ProfileData* data = m->first_data();

       m->is_valid(data);

       data = m->next_data(data)) {

    data->oop_iterate_m(blk, mr);

  }

  return size;

}

int methodDataKlass::oop_adjust_pointers(oop obj) {

  assert(obj->is_methodData(), "should be method data");

  methodDataOop m = methodDataOop(obj);

  // Get size before changing pointers

  // Don't call size() or oop_size() since that is a virtual call.

  int size = m->object_size();

  obj->adjust_header();

  MarkSweep::adjust_pointer(m->adr_method());

  ResourceMark rm;

  ProfileData* data;

  for (data = m->first_data(); m->is_valid(data); data = m->next_data(data)) {

    data->adjust_pointers();

  }

  return size;

}

#ifndef SERIALGC

void methodDataKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {

  assert (obj->is_methodData(), "object must be method data");

  methodDataOop m = methodDataOop(obj);

  // This should never point into the young gen.

  assert(!PSScavenge::should_scavenge(m->adr_method()), "Sanity");

}

int methodDataKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {

  assert(obj->is_methodData(), "should be method data");

  methodDataOop m = methodDataOop(obj);

  PSParallelCompact::adjust_pointer(m->adr_method());

  ResourceMark rm;

  ProfileData* data;

  for (data = m->first_data(); m->is_valid(data); data = m->next_data(data)) {

    data->update_pointers();

  }

  return m->object_size();

}

#endif // SERIALGC

#ifndef PRODUCT

// Printing

void methodDataKlass::oop_print_on(oop obj, outputStream* st) {

  assert(obj->is_methodData(), "should be method data");

  methodDataOop m = methodDataOop(obj);

  st->print("method data for ");

  m->method()->print_value_on(st);

  st->cr();

  m->print_data_on(st);

}

#endif //PRODUCT

void methodDataKlass::oop_print_value_on(oop obj, outputStream* st) {

  assert(obj->is_methodData(), "should be method data");

  methodDataOop m = methodDataOop(obj);

  st->print("method data for ");

  m->method()->print_value_on(st);

}

const char* methodDataKlass::internal_name() const {

  return "{method data}";

}

// Verification

void methodDataKlass::oop_verify_on(oop obj, outputStream* st) {

  Klass::oop_verify_on(obj, st);

  guarantee(obj->is_methodData(), "object must be method data");

  methodDataOop m = methodDataOop(obj);

  guarantee(m->is_perm(), "should be in permspace");

  m->verify_data_on(st);

}