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// 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.instrumentor;
import static com.code_intelligence.jazzer.instrumentor.PatchTestUtils.*;
import static java.lang.invoke.MethodHandles.lookup;
import static java.lang.invoke.MethodType.methodType;
import com.code_intelligence.jazzer.runtime.CoverageMap;
import java.lang.invoke.*;
import java.nio.file.Files;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.*;
@Warmup(iterations = 10, time = 3)
@Measurement(iterations = 10, time = 3)
@Fork(value = 3)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@BenchmarkMode(Mode.AverageTime)
@State(Scope.Benchmark)
@SuppressWarnings("unused")
public class EdgeCoverageInstrumentation {
private MethodHandle exampleMethod;
@Setup
public void setupInstrumentation() throws Throwable {
String outDir = System.getenv("TEST_UNDECLARED_OUTPUTS_DIR");
if (outDir == null || outDir.isEmpty()) {
outDir =
Files.createTempDirectory(EdgeCoverageInstrumentation.class.getSimpleName()).toString();
}
byte[] originalBytecode = classToBytecode(EdgeCoverageTarget.class);
dumpBytecode(outDir, EdgeCoverageTarget.class.getName(), originalBytecode);
byte[] patchedBytecode = applyInstrumentation(originalBytecode);
dumpBytecode(outDir, EdgeCoverageTarget.class.getName() + ".patched", patchedBytecode);
Class<?> patchedClass = bytecodeToClass(EdgeCoverageTarget.class.getName(), patchedBytecode);
Object obj = lookup().findConstructor(patchedClass, methodType(void.class)).invoke();
exampleMethod = lookup().bind(obj, "exampleMethod", methodType(List.class));
}
private byte[] applyInstrumentation(byte[] bytecode) {
return new EdgeCoverageInstrumentor(new StaticMethodStrategy(), CoverageMap.class, 0)
.instrument(bytecode);
}
@Benchmark
public Object benchmarkInstrumentedMethodCall() throws Throwable {
return exampleMethod.invoke();
}
}
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