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114 lines
3.2 KiB
114 lines
3.2 KiB
/*
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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 <fuzzer/FuzzedDataProvider.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 FakeIoDelegate& io, const std::vector<std::string>& args) {
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if (kFuzzLog) {
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std::cout << "cmd: ";
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for (const std::string& arg : args) {
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std::cout << arg << " ";
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}
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std::cout << std::endl;
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for (const auto& [f, input] : io.InputFiles()) {
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std::cout << "INPUT " << f << ": " << input << std::endl;
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}
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}
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int ret = android::aidl::aidl_entry(Options::From(args), io);
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if (ret != 0) return;
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if (kFuzzLog) {
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for (const auto& [f, output] : io.OutputFiles()) {
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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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void fuzzLang(const std::string& langOpt, const std::string& content) {
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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 package also in aidl_parser_fuzzer.dict
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args.emplace_back("a/path/Foo.aidl");
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fuzz(io, args);
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}
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void fuzzCheckApi(const std::string& a, const std::string& b) {
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FakeIoDelegate io;
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io.SetFileContents("a/path/Foo.aidl", a);
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io.SetFileContents("b/path/Foo.aidl", b);
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std::vector<std::string> args;
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args.emplace_back("aidl");
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args.emplace_back("--checkapi");
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// corresponding package also in aidl_parser_fuzzer.dict
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args.emplace_back("a/path/");
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args.emplace_back("b/path/");
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fuzz(io, args);
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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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FuzzedDataProvider provider = FuzzedDataProvider(data, size);
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if (provider.ConsumeBool()) {
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std::string content = provider.ConsumeRemainingBytesAsString();
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fuzzLang("ndk", content);
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fuzzLang("cpp", content);
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fuzzLang("java", content);
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fuzzLang("rust", content);
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} else {
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std::string contentA = provider.ConsumeRandomLengthString();
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std::string contentB = provider.ConsumeRemainingBytesAsString();
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fuzzCheckApi(contentA, contentB);
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}
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return 0;
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}
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