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