| // Copyright 2022 Code Intelligence GmbH |
| // |
| // Licensed 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 com.code_intelligence.jazzer.agent; |
| |
| import static com.code_intelligence.jazzer.agent.AgentUtils.extractBootstrapJar; |
| import static com.code_intelligence.jazzer.runtime.Constants.IS_ANDROID; |
| |
| import java.lang.instrument.Instrumentation; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import net.bytebuddy.agent.ByteBuddyAgent; |
| |
| public class AgentInstaller { |
| private static final AtomicBoolean hasBeenInstalled = new AtomicBoolean(); |
| |
| /** |
| * Appends the parts of Jazzer that have to be visible to all classes, including those in the Java |
| * standard library, to the bootstrap class loader path. Additionally, if enableAgent is true, |
| * also enables the Jazzer agent that instruments classes for fuzzing. |
| */ |
| public static void install(boolean enableAgent) { |
| // Only install the agent once. |
| if (!hasBeenInstalled.compareAndSet(false, true)) { |
| return; |
| } |
| |
| if (IS_ANDROID) { |
| return; |
| } |
| |
| Instrumentation instrumentation = ByteBuddyAgent.install(); |
| instrumentation.appendToBootstrapClassLoaderSearch(extractBootstrapJar()); |
| if (!enableAgent) { |
| return; |
| } |
| try { |
| Class<?> agent = Class.forName("com.code_intelligence.jazzer.agent.Agent"); |
| Method install = agent.getMethod("install", Instrumentation.class); |
| install.invoke(null, instrumentation); |
| } catch (ClassNotFoundException | InvocationTargetException | NoSuchMethodException |
| | IllegalAccessException e) { |
| throw new IllegalStateException("Failed to run Agent.install", e); |
| } |
| } |
| } |