zircon/system/utest/ctor/dso-ctor/dso-ctor.cc

// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "dso-ctor.h"

#include <sched.h>
#include <zircon/assert.h>

static bool dso_ctor_ran;

static struct Global {
  Global() { dso_ctor_ran = true; }
  ~Global() {
    // This is just some random nonempty thing that the compiler
    // can definitely never decide to optimize away.  We can't
    // easily test that the destructor got run, but we can ensure
    // that using a static destructor compiles and links correctly.
    sched_yield();
  }
} global;

__EXPORT
void check_dso_ctor() { ZX_ASSERT_MSG(dso_ctor_ran, "DSO global constuctor didn't run!"); }

static bool dso_tlocal_ctor_ran, dso_tlocal_dtor_ran;
static thread_local ThreadLocal<&dso_tlocal_ctor_ran, &dso_tlocal_dtor_ran> dso_tlocal;

__EXPORT
void check_dso_tlocal_in_thread() {
  decltype(dso_tlocal)::check_before_reference();
  dso_tlocal.flag = true;
  decltype(dso_tlocal)::check_after_reference();
}

__EXPORT
void check_dso_tlocal_after_join() { decltype(dso_tlocal)::check_after_join(); }