98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "aidl.h"
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#include "fake_io_delegate.h"
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#include "options.h"
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#include <iostream>
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#ifdef FUZZ_LOG
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constexpr bool kFuzzLog = true;
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#else
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constexpr bool kFuzzLog = false;
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#endif
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using android::aidl::test::FakeIoDelegate;
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void fuzz(const std::string& langOpt, const std::string& content) {
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// TODO: fuzz multiple files
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// TODO: fuzz arguments
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FakeIoDelegate io;
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io.SetFileContents("a/path/Foo.aidl", content);
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std::vector<std::string> args;
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args.emplace_back("aidl");
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args.emplace_back("--lang=" + langOpt);
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args.emplace_back("-b");
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args.emplace_back("-I .");
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args.emplace_back("-o out");
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// corresponding items also in aidl_parser_fuzzer.dict
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args.emplace_back("a/path/Foo.aidl");
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if (kFuzzLog) {
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std::cout << "lang: " << langOpt << " content: " << content << std::endl;
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}
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int ret = android::aidl::compile_aidl(Options::From(args), io);
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if (ret != 0) return;
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if (kFuzzLog) {
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for (const std::string& f : io.ListOutputFiles()) {
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std::string output;
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if (io.GetWrittenContents(f, &output)) {
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std::cout << "OUTPUT " << f << ": " << std::endl;
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std::cout << output << std::endl;
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}
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}
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}
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}
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void fuzz(uint8_t options, const std::string& content) {
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// keeping a byte of options we can use for various flags in the future (do
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// not remove or add unless absolutely necessary in order to preserve the
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// corpus).
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(void)options;
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// Process for each backend.
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//
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// This is unfortunate because we are parsing multiple times, but we want to
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// check generation of content for each backend. If output fails in one
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// backend, it's likely to fail in another.
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fuzz("ndk", content);
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fuzz("cpp", content);
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fuzz("java", content);
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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if (size <= 1) return 0; // no use
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// b/145447540, large nested expressions sometimes hit the stack depth limit.
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// Fuzzing things of this size don't provide any additional meaningful
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// coverage. This is an approximate value which should allow us to explore all
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// of the language w/o hitting a stack overflow.
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if (size > 2000) return 0;
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uint8_t options = *data;
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data++;
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size--;
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std::string content(reinterpret_cast<const char*>(data), size);
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fuzz(options, content);
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return 0;
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}
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