1 /*
   2  * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package jdk.vm.ci.hotspot;
  24 
  25 import jdk.vm.ci.code.InstalledCode;
  26 import jdk.vm.ci.code.InvalidInstalledCodeException;
  27 import jdk.vm.ci.meta.ResolvedJavaMethod;
  28 
  29 /**
  30  * Implementation of {@link InstalledCode} for code installed as a {@code RuntimeStub}. The address
  31  * of the {@code RuntimeStub} is stored in {@link InstalledCode#address} and the value of
  32  * {@code RuntimeStub::entry_point()} is in {@link InstalledCode#entryPoint}.
  33  */
  34 public class HotSpotRuntimeStub extends HotSpotInstalledCode {
  35 
  36     public HotSpotRuntimeStub(String name) {
  37         super(name);
  38     }
  39 
  40     public ResolvedJavaMethod getMethod() {
  41         return null;
  42     }
  43 
  44     @Override
  45     public boolean isValid() {
  46         return true;
  47     }
  48 
  49     @Override
  50     public void invalidate() {
  51     }
  52 
  53     @Override
  54     public String toString() {
  55         return String.format("InstalledRuntimeStub[stub=%s, codeBlob=0x%x]", name, getAddress());
  56     }
  57 
  58     @Override
  59     public Object executeVarargs(Object... args) throws InvalidInstalledCodeException {
  60         throw new InternalError("Cannot call stub " + name);
  61     }
  62 }