| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.cassandra.simulator.asm; |
| |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| |
| /** |
| * Handle simply thread signalling behaviours, namely monitorenter/monitorexit bytecodes to |
| * {@link org.apache.cassandra.simulator.systems.InterceptorOfGlobalMethods}, and LockSupport invocations to |
| * {@link org.apache.cassandra.simulator.systems.InterceptibleThread}. |
| * |
| * The global static methods we redirect monitors to take only one parameter (the monitor) and also return it, |
| * so that they have net zero effect on the stack, permitting the existing monitorenter/monitorexit instructions |
| * to remain where they are. LockSupport on the other hand is redirected entirely to the new method. |
| */ |
| class ThreadLocalRandomCheckTransformer extends MethodVisitor |
| { |
| public ThreadLocalRandomCheckTransformer(int api, MethodVisitor parent) |
| { |
| super(api, parent); |
| } |
| |
| @Override |
| public void visitInsn(int opcode) |
| { |
| switch (opcode) |
| { |
| case Opcodes.IRETURN: |
| super.visitMethodInsn(Opcodes.INVOKESTATIC, "org/apache/cassandra/simulator/systems/InterceptorOfSystemMethods$Global", |
| "threadLocalRandomCheck", "(I)I", false); |
| break; |
| case Opcodes.LRETURN: |
| super.visitMethodInsn(Opcodes.INVOKESTATIC, "org/apache/cassandra/simulator/systems/InterceptorOfSystemMethods$Global", |
| "threadLocalRandomCheck", "(J)J", false); |
| break; |
| } |
| super.visitInsn(opcode); |
| } |
| } |