1 /*
   2  * Copyright (c) 2018, 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.meta.ResolvedJavaType;
  26 import jdk.vm.ci.services.Services;
  27 
  28 /**
  29  * Indicates a path in HotSpot JVMCI related code that is unsupported in the current execution
  30  * environment. For example, certain operations are not supported by JVMCI code running in an ahead
  31  * of time compiled {@linkplain Services#IS_IN_NATIVE_IMAGE native image}. This usually reflects
  32  * functionality only needed in non-native image execution that would require a more complex
  33  * implementation to support in a native image.
  34  *
  35  * An example of such functionality is {@link ResolvedJavaType#isLocal()}. This can be conveniently
  36  * implemented when JVMCI is running on the HotSpot heap as we can obtain the {@link Class} mirror
  37  * for the {@link ResolvedJavaType} and call {@link Class#isLocalClass()}. In a native image, there
  38  * is no {@link Class} mirror available in the native image heap so implementing this would involve
  39  * a call into VM native code that in turn would make an upcall into Java code executing on the
  40  * HotSpot heap. We have opted to defer implementing functionality such as this until there's a
  41  * demonstrated need for it.
  42  */
  43 public class HotSpotJVMCIUnsupportedOperationError extends Error {
  44 
  45     public HotSpotJVMCIUnsupportedOperationError(String reason) {
  46         super(reason);
  47     }
  48 
  49     public HotSpotJVMCIUnsupportedOperationError(String reason, Throwable cause) {
  50         super(reason, cause);
  51     }
  52 
  53     private static final long serialVersionUID = 7782431672678016392L;
  54 
  55 }