mirror of
https://github.com/bminor/binutils-gdb.git
synced 2025-12-07 16:13:03 +00:00
5fe70629ce
This patch introduces a new macro, INIT_GDB_FILE. This is used to
replace the current "_initialize_" idiom when introducing a per-file
initialization function. That is, rather than write:
void _initialize_something ();
void
_initialize_something ()
{
...
}
... now you would write:
INIT_GDB_FILE (something)
{
...
}
The macro handles both the declaration and definition of the function.
The point of this approach is that it makes it harder to accidentally
cause an initializer to be omitted; see commit 2711e475 ("Ensure
cooked_index_entry self-tests are run"). Specifically, the regexp now
used by make-init-c seems harder to trick.
New in v2: un-did some erroneous changes made by the script.
The bulk of this patch was written by script.
Regression tested on x86-64 Fedora 41.
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/* Self tests for parallel_for_each
|
|
|
|
Copyright (C) 2021-2025 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "gdbsupport/selftest.h"
|
|
#include "gdbsupport/parallel-for.h"
|
|
|
|
#if CXX_STD_THREAD
|
|
|
|
#include "gdbsupport/thread-pool.h"
|
|
|
|
namespace selftests {
|
|
namespace parallel_for {
|
|
|
|
struct save_restore_n_threads
|
|
{
|
|
save_restore_n_threads ()
|
|
: n_threads (gdb::thread_pool::g_thread_pool->thread_count ())
|
|
{
|
|
}
|
|
|
|
~save_restore_n_threads ()
|
|
{
|
|
gdb::thread_pool::g_thread_pool->set_thread_count (n_threads);
|
|
}
|
|
|
|
int n_threads;
|
|
};
|
|
|
|
using foreach_callback_t = gdb::function_view<void (int first, int last)>;
|
|
using do_foreach_t = gdb::function_view<void (int first, int last,
|
|
foreach_callback_t)>;
|
|
|
|
static void
|
|
test_one (int n_threads, do_foreach_t do_foreach)
|
|
{
|
|
save_restore_n_threads saver;
|
|
gdb::thread_pool::g_thread_pool->set_thread_count (n_threads);
|
|
|
|
{
|
|
constexpr int upper_bound = 1000;
|
|
std::atomic<int> counter (0);
|
|
do_foreach (0, upper_bound,
|
|
[&] (int start, int end) { counter += end - start; });
|
|
SELF_CHECK (counter == upper_bound);
|
|
}
|
|
|
|
{
|
|
std::atomic<int> counter (0);
|
|
do_foreach (0, 0, [&] (int start, int end) { counter += end - start; });
|
|
SELF_CHECK (counter == 0);
|
|
}
|
|
|
|
{
|
|
/* Check that if there are fewer tasks than threads, then we won't
|
|
end up with a null result. */
|
|
std::vector<std::unique_ptr<int>> intresults;
|
|
std::atomic<bool> any_empty_tasks (false);
|
|
|
|
do_foreach (0, 1,
|
|
[&] (int start, int end)
|
|
{
|
|
if (start == end)
|
|
any_empty_tasks = true;
|
|
|
|
return std::make_unique<int> (end - start);
|
|
});
|
|
|
|
SELF_CHECK (!any_empty_tasks);
|
|
SELF_CHECK (std::all_of (intresults.begin (), intresults.end (),
|
|
[] (const std::unique_ptr<int> &entry)
|
|
{ return entry != nullptr; }));
|
|
}
|
|
}
|
|
|
|
static void
|
|
test_parallel_for_each ()
|
|
{
|
|
const std::vector<do_foreach_t> for_each_functions
|
|
{
|
|
[] (int start, int end, foreach_callback_t callback)
|
|
{ gdb::parallel_for_each<1> (start, end, callback); },
|
|
[] (int start, int end, foreach_callback_t callback)
|
|
{ gdb::sequential_for_each (start, end, callback);}
|
|
};
|
|
|
|
for (int n_threads : { 0, 1, 3 })
|
|
for (const auto &for_each_function : for_each_functions)
|
|
test_one (n_threads, for_each_function);
|
|
}
|
|
|
|
} /* namespace parallel_for */
|
|
} /* namespace selftests */
|
|
|
|
#endif /* CXX_STD_THREAD */
|
|
|
|
INIT_GDB_FILE (parallel_for_selftests)
|
|
{
|
|
#ifdef CXX_STD_THREAD
|
|
selftests::register_test ("parallel_for",
|
|
selftests::parallel_for::test_parallel_for_each);
|
|
#endif /* CXX_STD_THREAD */
|
|
}
|