gdb/unittests/main-thread-selftests.c

   1 /* Self tests for run_on_main_thread
   2
   3    Copyright (C) 2019-2024 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "gdbsupport/selftest.h"
  21 #include "gdbsupport/block-signals.h"
  22 #include "gdbsupport/scope-exit.h"
  23 #include "run-on-main-thread.h"
  24 #include "gdbsupport/event-loop.h"
  25 #if CXX_STD_THREAD
  26 #include <thread>
  27 #endif
  28
  29 namespace selftests {
  30 namespace main_thread_tests {
  31
  32 #if CXX_STD_THREAD
  33
  34 static bool done;
  35
  36 static void
  37 set_done ()
  38 {
  39   run_on_main_thread ([] ()
  40     {
  41       done = true;
  42     });
  43 }
  44
  45 static void
  46 run_tests ()
  47 {
  48   std::thread thread;
  49
  50   done = false;
  51
  52   {
  53     gdb::block_signals blocker;
  54
  55     SCOPE_EXIT
  56       {
  57         if (thread.joinable ())
  58           thread.join ();
  59       };
  60     thread = std::thread (set_done);
  61   }
  62
  63   while (!done && gdb_do_one_event () >= 0)
  64     ;
  65
  66   /* Actually the test will just hang, but we want to test
  67      something.  */
  68   SELF_CHECK (done);
  69 }
  70
  71 #endif
  72
  73 }
  74 }
  75
  76 void _initialize_main_thread_selftests ();
  77 void
  78 _initialize_main_thread_selftests ()
  79 {
  80 #if CXX_STD_THREAD
  81   selftests::register_test ("run_on_main_thread",
  82                             selftests::main_thread_tests::run_tests);
  83 #endif
  84 }