view src/share/vm/oops/oop.cpp @ 2149:7e37af9d69ef

7011379: G1: overly long concurrent marking cycles Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads. Reviewed-by: johnc, ysr
author tonyp
date Wed, 19 Jan 2011 09:35:17 -0500
parents f95d63e2154a
children f08d439fab8c
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/*
 * 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 "classfile/javaClasses.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "utilities/copy.hpp"
#ifdef TARGET_OS_FAMILY_linux
# include "thread_linux.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_solaris
# include "thread_solaris.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_windows
# include "thread_windows.inline.hpp"
#endif

bool always_do_update_barrier = false;

BarrierSet* oopDesc::_bs = NULL;

void oopDesc::print_on(outputStream* st) const {
  if (this == NULL) {
    st->print_cr("NULL");
  } else {
    blueprint()->oop_print_on(oop(this), st);
  }
}

void oopDesc::print_address_on(outputStream* st) const {
  if (PrintOopAddress) {
    st->print("{"INTPTR_FORMAT"}", this);
  }
}

void oopDesc::print()         { print_on(tty);         }

void oopDesc::print_address() { print_address_on(tty); }

char* oopDesc::print_string() {
  stringStream st;
  print_on(&st);
  return st.as_string();
}

void oopDesc::print_value() {
  print_value_on(tty);
}

char* oopDesc::print_value_string() {
  char buf[100];
  stringStream st(buf, sizeof(buf));
  print_value_on(&st);
  return st.as_string();
}

void oopDesc::print_value_on(outputStream* st) const {
  oop obj = oop(this);
  if (this == NULL) {
    st->print("NULL");
  } else if (java_lang_String::is_instance(obj)) {
    java_lang_String::print(obj, st);
    if (PrintOopAddress) print_address_on(st);
#ifdef ASSERT
  } else if (!Universe::heap()->is_in(obj) || !Universe::heap()->is_in(klass())) {
    st->print("### BAD OOP %p ###", (address)obj);
#endif //ASSERT
  } else {
    blueprint()->oop_print_value_on(obj, st);
  }
}


void oopDesc::verify_on(outputStream* st) {
  if (this != NULL) {
    blueprint()->oop_verify_on(this, st);
  }
}


void oopDesc::verify() {
  verify_on(tty);
}


// XXX verify_old_oop doesn't do anything (should we remove?)
void oopDesc::verify_old_oop(oop* p, bool allow_dirty) {
  blueprint()->oop_verify_old_oop(this, p, allow_dirty);
}

void oopDesc::verify_old_oop(narrowOop* p, bool allow_dirty) {
  blueprint()->oop_verify_old_oop(this, p, allow_dirty);
}

bool oopDesc::partially_loaded() {
  return blueprint()->oop_partially_loaded(this);
}


void oopDesc::set_partially_loaded() {
  blueprint()->oop_set_partially_loaded(this);
}


intptr_t oopDesc::slow_identity_hash() {
  // slow case; we have to acquire the micro lock in order to locate the header
  ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
  HandleMark hm;
  Handle object((oop)this);
  assert(!is_shared_readonly(), "using identity hash on readonly object?");
  return ObjectSynchronizer::identity_hash_value_for(object);
}

VerifyOopClosure VerifyOopClosure::verify_oop;

void VerifyOopClosure::do_oop(oop* p)       { VerifyOopClosure::do_oop_work(p); }
void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }