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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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 dexfuzz.program;
import dexfuzz.Log;
import dexfuzz.program.mutators.CodeMutator;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
/**
* Responsible for serializing mutations, allowing replay of mutations, and searching
* for a minimal set of mutations.
*/
public class MutationSerializer {
public static String getMutationString(Mutation mutation) {
StringBuilder builder = new StringBuilder();
builder.append(mutation.mutatorClass.getCanonicalName()).append(" ");
builder.append(mutation.mutatableCodeIdx).append(" ");
builder.append(mutation.getString());
return builder.toString();
}
public static void writeMutation(BufferedWriter writer, Mutation mutation) throws IOException {
// Write out the common fields.
writer.write(mutation.mutatorClass.getCanonicalName() + " "
+ mutation.mutatableCodeIdx + " ");
// Use the mutation's own function to write out the rest of the fields.
writer.write(mutation.getString() + "\n");
}
@SuppressWarnings("unchecked")
public static Mutation readMutation(BufferedReader reader) throws IOException {
String line = reader.readLine();
String[] fields = null;
if (line != null) {
fields = line.split(" ");
} else {
Log.errorAndQuit("Could not read line during mutation loading.");
}
// Read the mutator's class name
String mutatorClassName = fields[0];
// Get the class for that mutator
Class<? extends CodeMutator> mutatorClass = null;
try {
mutatorClass = (Class<? extends CodeMutator>) Class.forName(mutatorClassName);
} catch (ClassNotFoundException e) {
Log.errorAndQuit("Cannot find a mutator class called: " + mutatorClassName);
}
Mutation mutation = null;
try {
mutation = mutatorClass.newInstance().getNewMutation();
} catch (InstantiationException e) {
Log.errorAndQuit("Unable to instantiate " + mutatorClassName
+ " using default constructor.");
} catch (IllegalAccessException e) {
Log.errorAndQuit("Unable to access methods in " + mutatorClassName + ".");
}
if (mutation == null) {
Log.errorAndQuit("Unable to get Mutation for Mutator: " + mutatorClassName);
}
// Populate the common fields of the mutation.
mutation.mutatorClass = mutatorClass;
// The Program must set this later, using the mutatable_code_idx
// into its list of MutatableCodes.
mutation.mutatableCode = null;
mutation.mutatableCodeIdx = Integer.parseInt(fields[1]);
// Use the mutation's own method to read the rest of the fields.
mutation.parseString(fields);
return mutation;
}
}
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