util_threadnames_tests.cpp

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// Copyright (c) 2018-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#include <util/string.h>
#include <util/threadnames.h>
 
#include <mutex>
#include <set>
#include <string>
#include <thread>
#include <vector>
 
#include <config/bitcoin-config.h> // IWYU pragma: keep
 
#include <boost/test/unit_test.hpp>
 
BOOST_AUTO_TEST_SUITE(util_threadnames_tests)
 
const std::string TEST_THREAD_NAME_BASE = "test_thread.";
 
std::set<std::string> RenameEnMasse(int num_threads)
{
    std::vector<std::thread> threads;
    std::set<std::string> names;
    std::mutex lock;
 
    auto RenameThisThread = [&](int i) {
        util::ThreadRename(TEST_THREAD_NAME_BASE + ToString(i));
        std::lock_guard<std::mutex> guard(lock);
        names.insert(util::ThreadGetInternalName());
    };
 
    threads.reserve(num_threads);
    for (int i = 0; i < num_threads; ++i) {
        threads.emplace_back(RenameThisThread, i);
    }
 
    for (std::thread& thread : threads) thread.join();
 
    return names;
}
 
BOOST_AUTO_TEST_CASE(util_threadnames_test_rename_threaded)
{
#if !defined(HAVE_THREAD_LOCAL)
    // This test doesn't apply to platforms where we don't have thread_local.
    return;
#endif
 
    std::set<std::string> names = RenameEnMasse(100);
 
    BOOST_CHECK_EQUAL(names.size(), 100U);
 
    // Names "test_thread.[n]" should exist for n = [0, 99]
    for (int i = 0; i < 100; ++i) {
        BOOST_CHECK(names.find(TEST_THREAD_NAME_BASE + ToString(i)) != names.end());
    }
 
}
 
BOOST_AUTO_TEST_SUITE_END()