diff options
Diffstat (limited to 'agent/src/main/java/com/code_intelligence/jazzer/utils/ManifestUtils.kt')
-rw-r--r-- | agent/src/main/java/com/code_intelligence/jazzer/utils/ManifestUtils.kt | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/agent/src/main/java/com/code_intelligence/jazzer/utils/ManifestUtils.kt b/agent/src/main/java/com/code_intelligence/jazzer/utils/ManifestUtils.kt new file mode 100644 index 00000000..e7165e55 --- /dev/null +++ b/agent/src/main/java/com/code_intelligence/jazzer/utils/ManifestUtils.kt @@ -0,0 +1,54 @@ +// 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.utils + +import java.util.jar.Manifest + +object ManifestUtils { + + private const val FUZZ_TARGET_CLASS = "Jazzer-Fuzz-Target-Class" + const val HOOK_CLASSES = "Jazzer-Hook-Classes" + + fun combineManifestValues(attribute: String): List<String> { + val manifests = ClassLoader.getSystemResources("META-INF/MANIFEST.MF") + return manifests.asSequence().mapNotNull { url -> + url.openStream().use { inputStream -> + val manifest = Manifest(inputStream) + manifest.mainAttributes.getValue(attribute) + } + }.toList() + } + + /** + * Returns the value of the `Fuzz-Target-Class` manifest attribute if there is a unique one among all manifest + * files in the classpath. + */ + @JvmStatic + fun detectFuzzTargetClass(): String? { + val fuzzTargets = combineManifestValues(FUZZ_TARGET_CLASS) + return when (fuzzTargets.size) { + 0 -> null + 1 -> fuzzTargets.first() + else -> { + println( + """ + |WARN: More than one Jazzer-Fuzz-Target-Class manifest entry detected on the + |classpath.""".trimMargin() + ) + null + } + } + } +} |