| /* |
| * Copyright (c) 2017, 2018, 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. |
| * |
| */ |
| |
| package sun.jvm.hotspot.gc.z; |
| |
| import java.io.PrintStream; |
| |
| import sun.jvm.hotspot.debugger.Address; |
| import sun.jvm.hotspot.runtime.VM; |
| import sun.jvm.hotspot.runtime.VMObject; |
| import sun.jvm.hotspot.runtime.VMObjectFactory; |
| import sun.jvm.hotspot.types.Type; |
| import sun.jvm.hotspot.types.TypeDataBase; |
| |
| // Mirror class for ZHeap |
| |
| public class ZHeap extends VMObject { |
| |
| private static long pageAllocatorFieldOffset; |
| private static long pageTableFieldOffset; |
| |
| static { |
| VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase())); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) { |
| Type type = db.lookupType("ZHeap"); |
| |
| pageAllocatorFieldOffset = type.getAddressField("_page_allocator").getOffset(); |
| pageTableFieldOffset = type.getAddressField("_pagetable").getOffset(); |
| } |
| |
| public ZHeap(Address addr) { |
| super(addr); |
| } |
| |
| private ZPageAllocator pageAllocator() { |
| Address pageAllocatorAddr = addr.addOffsetTo(pageAllocatorFieldOffset); |
| return (ZPageAllocator)VMObjectFactory.newObject(ZPageAllocator.class, pageAllocatorAddr); |
| } |
| |
| ZPageTable pageTable() { |
| return (ZPageTable)VMObjectFactory.newObject(ZPageTable.class, addr.addOffsetTo(pageTableFieldOffset)); |
| } |
| |
| public long maxCapacity() { |
| return pageAllocator().maxCapacity(); |
| } |
| |
| public long capacity() { |
| return pageAllocator().capacity(); |
| } |
| |
| public long used() { |
| return pageAllocator().used(); |
| } |
| |
| boolean is_relocating(Address o) { |
| return pageTable().is_relocating(o); |
| } |
| |
| Address forward_object(Address addr) { |
| ZPage page = pageTable().get(addr); |
| return page.forward_object(addr); |
| } |
| |
| Address relocate_object(Address addr) { |
| ZPage page = pageTable().get(addr); |
| return page.relocate_object(addr); |
| } |
| |
| public void printOn(PrintStream tty) { |
| tty.print(" ZHeap "); |
| tty.print("used " + (used() / 1024 / 1024) + "M, "); |
| tty.print("capacity " + (capacity() / 1024 / 1024) + "M, "); |
| tty.println("max capacity " + (maxCapacity() / 1024 / 1024) + "M"); |
| } |
| } |