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78 lines
2.5 KiB
78 lines
2.5 KiB
4 months ago
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/*
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* Copyright 2020 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 <atomic>
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#include <thread>
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#include "fuzzer/FuzzedDataProvider.h"
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#include "utils/ProcessCallStack.h"
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using android::ProcessCallStack;
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static constexpr int MAX_NAME_SIZE = 1000;
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static constexpr int MAX_LOG_META_SIZE = 1000;
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static constexpr uint8_t MAX_THREADS = 10;
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std::atomic_bool ranCallStackUpdate(false);
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void loop() {
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while (!ranCallStackUpdate.load()) {
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std::this_thread::sleep_for(std::chrono::milliseconds(50));
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}
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}
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void spawnThreads(FuzzedDataProvider* dataProvider) {
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std::vector<std::thread> threads = std::vector<std::thread>();
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// Get the number of threads to generate
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uint8_t count = dataProvider->ConsumeIntegralInRange<uint8_t>(1, MAX_THREADS);
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// Generate threads
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for (uint8_t i = 0; i < count; i++) {
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std::string threadName =
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dataProvider->ConsumeRandomLengthString(MAX_NAME_SIZE).append(std::to_string(i));
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std::thread th = std::thread(loop);
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pthread_setname_np(th.native_handle(), threadName.c_str());
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threads.push_back(move(th));
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}
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// Collect thread information
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ProcessCallStack callStack = ProcessCallStack();
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callStack.update();
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// Tell our patiently waiting threads they can be done now.
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ranCallStackUpdate.store(true);
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std::string logTag = dataProvider->ConsumeRandomLengthString(MAX_LOG_META_SIZE);
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std::string prefix = dataProvider->ConsumeRandomLengthString(MAX_LOG_META_SIZE);
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// Both of these, along with dump, all call print() under the hood,
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// Which is covered by the Printer fuzzer.
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callStack.log(logTag.c_str());
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callStack.toString(prefix.c_str());
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// Check size
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callStack.size();
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// wait for any remaining threads
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for (auto& thread : threads) {
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thread.join();
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}
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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FuzzedDataProvider dataProvider(data, size);
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spawnThreads(&dataProvider);
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return 0;
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}
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