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// Copyright 2021 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.
import com.google.devtools.build.runfiles.Runfiles;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class FuzzTargetTestWrapper {
public static void main(String[] args) {
String driverActualPath;
String jarActualPath;
Runfiles runfiles;
try {
runfiles = Runfiles.create();
driverActualPath = runfiles.rlocation(rlocationPath(args[0]));
jarActualPath = runfiles.rlocation(rlocationPath(args[1]));
} catch (IOException | ArrayIndexOutOfBoundsException e) {
e.printStackTrace();
System.exit(1);
return;
}
ProcessBuilder processBuilder = new ProcessBuilder();
Map<String, String> environment = processBuilder.environment();
// Ensure that Jazzer can find its runfiles.
environment.putAll(runfiles.getEnvVars());
// Crashes will be available as test outputs. These are cleared on the next run,
// so this is only useful for examples.
String outputDir = System.getenv("TEST_UNDECLARED_OUTPUTS_DIR");
List<String> command =
Stream
.concat(Stream.of(driverActualPath, String.format("-artifact_prefix=%s/", outputDir),
String.format("--reproducer_path=%s", outputDir), "-seed=2735196724",
String.format("--cp=%s", jarActualPath)),
Arrays.stream(args).skip(2))
.collect(Collectors.toList());
processBuilder.inheritIO();
processBuilder.command(command);
try {
int exitCode = processBuilder.start().waitFor();
// Assert that we either found a crash in Java (exit code 77) or a sanitizer crash (exit code
// 76).
if (exitCode != 76 && exitCode != 77) {
System.exit(3);
}
String[] outputFiles = new File(outputDir).list();
if (outputFiles == null) {
System.exit(4);
}
// Verify that libFuzzer dumped a crashing input.
if (Arrays.stream(outputFiles).noneMatch(name -> name.startsWith("crash-"))) {
System.exit(5);
}
} catch (IOException | InterruptedException e) {
e.printStackTrace();
System.exit(2);
}
System.exit(0);
}
// Turns the result of Bazel's `$(rootpath ...)` into the correct format for rlocation.
private static String rlocationPath(String rootpath) {
if (rootpath.startsWith("external/")) {
return rootpath.substring("external/".length());
} else {
return "jazzer/" + rootpath;
}
}
}
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