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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.runtime;
import com.github.fmeum.rules_jni.RulesJni;
import java.io.UnsupportedEncodingException;
/**
* Optimized implementations of the libFuzzer callbacks that do not rely on the deprecated
* CriticalJNINatives feature. Methods with `Java` in their name implement some parts in Java.
*/
public final class FuzzerCallbacksOptimizedNonCritical {
static {
RulesJni.loadLibrary("fuzzer_callbacks", FuzzerCallbacksOptimizedNonCritical.class);
}
static native void traceSwitch(long val, long[] cases, int pc);
static native void traceMemcmp(byte[] b1, byte[] b2, int result, int pc);
static native void traceStrstr(String s1, String s2, int pc);
static void traceStrstrJava(String haystack, String needle, int pc)
throws UnsupportedEncodingException {
// Note that we are not encoding as modified UTF-8 here: The FuzzedDataProvider transparently
// converts CESU8 into modified UTF-8 by coding null bytes on two bytes. Since the fuzzer is
// more likely to insert literal null bytes, having both the fuzzer input and the reported
// string comparisons be CESU8 should perform even better than the current implementation using
// modified UTF-8.
traceStrstrInternal(needle.substring(0, Math.min(needle.length(), 64)).getBytes("CESU8"), pc);
}
private static native void traceStrstrInternal(byte[] needle, int pc);
}
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