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1   /*
2    * Copyright 2019 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.util.internal.svm;
17  
18  import com.oracle.svm.core.annotate.Alias;
19  import com.oracle.svm.core.annotate.RecomputeFieldValue;
20  import com.oracle.svm.core.annotate.TargetClass;
21  
22  @TargetClass(className = "io.netty.util.internal.PlatformDependent")
23  final class PlatformDependentSubstitution {
24      private PlatformDependentSubstitution() {
25      }
26  
27      /**
28       * The class PlatformDependent caches the byte array base offset by reading the
29       * field from PlatformDependent0. The automatic recomputation of Substrate VM
30       * correctly recomputes the field in PlatformDependent0, but since the caching
31       * in PlatformDependent happens during image building, the non-recomputed value
32       * is cached.
33       */
34      @Alias
35      @RecomputeFieldValue(
36          kind = RecomputeFieldValue.Kind.ArrayBaseOffset,
37          declClass = byte[].class)
38      private static long BYTE_ARRAY_BASE_OFFSET;
39  }