Add Kotlin fuzz target

2 files changed, 54 insertions, 0 deletions

diff --git a/examples/BUILD.bazel b/examples/BUILD.bazel
index 39392796..66a85855 100644
--- a/examples/BUILD.bazel
+++ b/examples/BUILD.bazel
@@ -1,3 +1,4 @@
+load("@io_bazel_rules_kotlin//kotlin:kotlin.bzl", "kt_jvm_library")
 load("//bazel:fuzz_target.bzl", "java_fuzz_target_test")
 
 java_fuzz_target_test(
@@ -138,6 +139,28 @@ java_fuzz_target_test(
     ],
 )
 
+kt_jvm_library(
+    name = "KlaxonFuzzTarget",
+    srcs = [
+        "src/main/java/com/example/KlaxonFuzzer.kt",
+    ],
+    deps = [
+        "//agent/src/main/java/com/code_intelligence/jazzer/api",
+        "@maven//:com_beust_klaxon",
+    ],
+)
+
+java_fuzz_target_test(
+    name = "KlaxonFuzzer",
+    fuzzer_args = [
+        "--keep_going=7",
+        # Prevent the JVM from optimizing away stack traces (interfers with deduplication).
+        "--jvm_args=-XX:-OmitStackTraceInFastThrow",
+    ],
+    target_class = "com.example.KlaxonFuzzer",
+    runtime_deps = [":KlaxonFuzzTarget"],
+)
+
 java_fuzz_target_test(
     name = "TurboJpegFuzzer",
     srcs = [
diff --git a/examples/src/main/java/com/example/KlaxonFuzzer.kt b/examples/src/main/java/com/example/KlaxonFuzzer.kt
new file mode 100644
index 00000000..39216eea
--- /dev/null
+++ b/examples/src/main/java/com/example/KlaxonFuzzer.kt
@@ -0,0 +1,31 @@
+// 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.example
+
+import com.beust.klaxon.KlaxonException
+import com.beust.klaxon.Parser
+import com.code_intelligence.jazzer.api.FuzzedDataProvider
+
+// Reproduces https://github.com/cbeust/klaxon/pull/330
+object KlaxonFuzzer {
+
+    @JvmStatic
+    fun fuzzerTestOneInput(data: FuzzedDataProvider) {
+        try {
+            Parser.default().parse(StringBuilder(data.consumeRemainingAsString()))
+        } catch (_: KlaxonException) {
+        }
+    }
+}