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/* Test basic thread_local support.
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Copyright (C) 2015-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <string.h>
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#include <functional>
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#include <string>
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#include <thread>
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struct counter
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{
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int constructed {};
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int destructed {};
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void reset ();
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};
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void
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counter::reset ()
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{
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constructed = 0;
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destructed = 0;
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}
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static std::string
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to_string (const counter &c)
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{
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char buf[128];
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snprintf (buf, sizeof (buf), "%d/%d",
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c.constructed, c.destructed);
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return buf;
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}
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template <counter *Counter>
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struct counting
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{
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counting () __attribute__ ((noinline, noclone));
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~counting () __attribute__ ((noinline, noclone));
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void operation () __attribute__ ((noinline, noclone));
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};
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template<counter *Counter>
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__attribute__ ((noinline, noclone))
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counting<Counter>::counting ()
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{
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++Counter->constructed;
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}
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template<counter *Counter>
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__attribute__ ((noinline, noclone))
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counting<Counter>::~counting ()
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{
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++Counter->destructed;
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}
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template<counter *Counter>
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void __attribute__ ((noinline, noclone))
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counting<Counter>::operation ()
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{
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// Optimization barrier.
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asm ("");
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}
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static counter counter_static;
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static counter counter_anonymous_namespace;
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static counter counter_extern;
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static counter counter_function_local;
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static bool errors (false);
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static std::string
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all_counters ()
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{
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return to_string (counter_static)
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+ ' ' + to_string (counter_anonymous_namespace)
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+ ' ' + to_string (counter_extern)
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+ ' ' + to_string (counter_function_local);
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}
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static void
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check_counters (const char *name, const char *expected)
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{
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std::string actual{all_counters ()};
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if (actual != expected)
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{
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printf ("error: %s: (%s) != (%s)\n",
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name, actual.c_str (), expected);
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errors = true;
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}
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}
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static void
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reset_all ()
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{
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counter_static.reset ();
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counter_anonymous_namespace.reset ();
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counter_extern.reset ();
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counter_function_local.reset ();
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}
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static thread_local counting<&counter_static> counting_static;
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namespace {
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thread_local counting<&counter_anonymous_namespace>
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counting_anonymous_namespace;
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}
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extern thread_local counting<&counter_extern> counting_extern;
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thread_local counting<&counter_extern> counting_extern;
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static void *
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thread_without_access (void *)
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{
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return nullptr;
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}
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static void *
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thread_with_access (void *)
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{
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thread_local counting<&counter_function_local> counting_function_local;
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counting_function_local.operation ();
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check_counters ("early in thread_with_access", "0/0 0/0 0/0 1/0");
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counting_static.operation ();
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counting_anonymous_namespace.operation ();
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counting_extern.operation ();
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check_counters ("in thread_with_access", "1/0 1/0 1/0 1/0");
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return nullptr;
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}
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static int
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do_test (void)
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{
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std::function<void (void *(void *))> do_pthread =
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[](void *(func) (void *))
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{
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pthread_t thr;
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int ret = pthread_create (&thr, nullptr, func, nullptr);
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if (ret != 0)
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{
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errno = ret;
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printf ("error: pthread_create: %m\n");
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errors = true;
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return;
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}
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ret = pthread_join (thr, nullptr);
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if (ret != 0)
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{
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errno = ret;
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printf ("error: pthread_join: %m\n");
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errors = true;
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return;
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}
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};
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std::function<void (void *(void *))> do_std_thread =
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[](void *(func) (void *))
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{
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std::thread thr{[func] {func (nullptr);}};
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thr.join ();
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};
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std::array<std::pair<const char *, std::function<void (void *(void *))>>, 2>
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do_thread_X
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{{
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{"pthread_create", do_pthread},
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{"std::thread", do_std_thread},
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}};
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for (auto do_thread : do_thread_X)
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{
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printf ("info: testing %s\n", do_thread.first);
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check_counters ("initial", "0/0 0/0 0/0 0/0");
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do_thread.second (thread_without_access);
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check_counters ("after thread_without_access", "0/0 0/0 0/0 0/0");
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reset_all ();
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do_thread.second (thread_with_access);
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check_counters ("after thread_with_access", "1/1 1/1 1/1 1/1");
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reset_all ();
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}
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return errors;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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