1 files changed, 45 insertions, 0 deletions
diff --git a/src/main/java/com/code_intelligence/jazzer/instrumentor/Instrumentor.kt b/src/main/java/com/code_intelligence/jazzer/instrumentor/Instrumentor.kt
new file mode 100644
index 00000000..c6db94c0
--- /dev/null
+++ b/src/main/java/com/code_intelligence/jazzer/instrumentor/Instrumentor.kt
@@ -0,0 +1,45 @@
+// 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.
+
+package com.code_intelligence.jazzer.instrumentor
+
+import org.objectweb.asm.Opcodes
+import org.objectweb.asm.tree.MethodNode
+
+enum class InstrumentationType {
+    CMP,
+    COV,
+    DIV,
+    GEP,
+    INDIR,
+    NATIVE,
+}
+
+internal interface Instrumentor {
+    fun instrument(internalClassName: String, bytecode: ByteArray): ByteArray
+
+    fun shouldInstrument(access: Int): Boolean {
+        return (access and Opcodes.ACC_ABSTRACT == 0) &&
+            (access and Opcodes.ACC_NATIVE == 0)
+    }
+
+    fun shouldInstrument(method: MethodNode): Boolean {
+        return shouldInstrument(method.access) &&
+            method.instructions.size() > 0
+    }
+
+    companion object {
+        const val ASM_API_VERSION = Opcodes.ASM9
+    }
+}