53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
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// Copyright 2020 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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// This is a simple example of how to write a fuzzer. The target function is
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// crafted to demonstrates how the fuzzer can analyze conditional branches and
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// incrementally cover more and more code until a defect is found.
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//
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// See build_and_run_toy_fuzzer.sh for examples of how you can build and run
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// this example.
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#include <cstddef>
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#include <cstdint>
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#include <string_view>
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#include "pw_fuzzer/fuzzed_data_provider.h"
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#include "pw_status/status.h"
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namespace pw::fuzzer::example {
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namespace {
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// The code to fuzz. This would normally be in separate library.
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Status SomeAPI(std::string_view s1, std::string_view s2) {
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if (s1 == "hello") {
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if (s2 == "world") {
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abort();
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}
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}
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return OkStatus();
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}
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} // namespace
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} // namespace pw::fuzzer::example
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// The fuzz target function
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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FuzzedDataProvider provider(data, size);
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std::string s1 = provider.ConsumeRandomLengthString();
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std::string s2 = provider.ConsumeRemainingBytesAsString();
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pw::fuzzer::example::SomeAPI(s1, s2).IgnoreError();
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return 0;
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}
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