From 27b15be5fd30af5f3b64ab6451fb26c417681221 Mon Sep 17 00:00:00 2001 From: Fabian Meumertzheim Date: Fri, 8 Oct 2021 15:41:08 +0200 Subject: Use rules_jni This simplifies the libjvm location logic as well as native library packaging. Incidentally, this fixes the libjpeg_turbo build. In anticipation of Windows support and because it simplifies further improvements to the fuzz target test setup, the wrapper is rewritten in Java. --- .../com_example_ExampleFuzzerWithNative.cpp | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 examples/src/main/native/com/example/com_example_ExampleFuzzerWithNative.cpp (limited to 'examples/src/main/native/com/example/com_example_ExampleFuzzerWithNative.cpp') diff --git a/examples/src/main/native/com/example/com_example_ExampleFuzzerWithNative.cpp b/examples/src/main/native/com/example/com_example_ExampleFuzzerWithNative.cpp new file mode 100644 index 00000000..774e5998 --- /dev/null +++ b/examples/src/main/native/com/example/com_example_ExampleFuzzerWithNative.cpp @@ -0,0 +1,42 @@ +// 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. + +#include "com_example_ExampleFuzzerWithNative.h" + +#include +#include + +// simple function containing a crash that requires coverage and string compare +// instrumentation for the fuzzer to find +__attribute__((optnone)) void parseInternal(const std::string &input) { + constexpr int bar = std::numeric_limits::max() - 5; + // Crashes with UBSan. + if (bar + input[0] == 300) { + return; + } + if (input[0] == 'a' && input[1] == 'b' && input[5] == 'c') { + if (input.find("secret_in_native_library") != std::string::npos) { + // Crashes with ASan. + [[maybe_unused]] char foo = input[input.size() + 2]; + } + } +} + +JNIEXPORT jboolean JNICALL Java_com_example_ExampleFuzzerWithNative_parse( + JNIEnv *env, jobject o, jstring bytes) { + const char *input(env->GetStringUTFChars(bytes, nullptr)); + parseInternal(input); + env->ReleaseStringUTFChars(bytes, input); + return false; +} -- cgit v1.2.3