1 // Copyright 2021 Code Intelligence GmbH 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package com.code_intelligence.jazzer.instrumentor 16 17 import com.code_intelligence.jazzer.runtime.CoverageMap 18 extractClassFileMajorVersionnull19fun extractClassFileMajorVersion(classfileBuffer: ByteArray): Int { 20 return ((classfileBuffer[6].toInt() and 0xff) shl 8) or (classfileBuffer[7].toInt() and 0xff) 21 } 22 23 class ClassInstrumentor constructor(bytecode: ByteArray) { 24 25 var instrumentedBytecode = bytecode 26 private set 27 coveragenull28 fun coverage(initialEdgeId: Int): Int { 29 val edgeCoverageInstrumentor = EdgeCoverageInstrumentor( 30 defaultEdgeCoverageStrategy, 31 defaultCoverageMap, 32 initialEdgeId, 33 ) 34 instrumentedBytecode = edgeCoverageInstrumentor.instrument(instrumentedBytecode) 35 return edgeCoverageInstrumentor.numEdges 36 } 37 traceDataFlownull38 fun traceDataFlow(instrumentations: Set<InstrumentationType>) { 39 instrumentedBytecode = TraceDataFlowInstrumentor(instrumentations).instrument(instrumentedBytecode) 40 } 41 hooksnull42 fun hooks(hooks: Iterable<Hook>) { 43 instrumentedBytecode = HookInstrumentor( 44 hooks, 45 java6Mode = extractClassFileMajorVersion(instrumentedBytecode) < 51 46 ).instrument(instrumentedBytecode) 47 } 48 49 companion object { 50 val defaultEdgeCoverageStrategy = StaticMethodStrategy() 51 val defaultCoverageMap = CoverageMap::class.java 52 } 53 } 54