1 /* 2 * Copyright 2019 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://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, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.perfmark.java9; 18 19 import io.perfmark.impl.Generator; 20 import io.perfmark.impl.MarkHolder; 21 import io.perfmark.impl.MarkHolderProvider; 22 23 final class SecretVarHandleMarkHolderProvider { 24 25 public static final class VarHandleMarkHolderProvider extends MarkHolderProvider { 26 VarHandleMarkHolderProvider()27 public VarHandleMarkHolderProvider() { 28 // Do some basic operations to see if it works. 29 MarkHolder holder = create(12345); 30 holder.start(1 << Generator.GEN_OFFSET, "bogus", 0); 31 holder.stop(1 << Generator.GEN_OFFSET, "bogus", 0); 32 int size = holder.read(false).size(); 33 if (size != 2) { 34 throw new AssertionError("Wrong size " + size); 35 } 36 } 37 38 @Override 39 @SuppressWarnings("deprecation") create()40 public MarkHolder create() { 41 return new VarHandleMarkHolder(); 42 } 43 44 @Override create(long markHolderId)45 public MarkHolder create(long markHolderId) { 46 return new VarHandleMarkHolder(); 47 } 48 } 49 SecretVarHandleMarkHolderProvider()50 private SecretVarHandleMarkHolderProvider() { 51 throw new AssertionError("nope"); 52 } 53 } 54