gdb/unittests/vec-utils-selftests.c

   1 /* Self tests for vector utility routines for GDB, the GNU debugger.
   2
   3    Copyright (C) 2019-2022 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/common-defs.h"
  21 #include "gdbsupport/selftest.h"
  22
  23 #include "gdbsupport/gdb_vecs.h"
  24
  25 namespace selftests {
  26 namespace vector_utils_tests {
  27
  28 static void
  29 unordered_remove_tests ()
  30 {
  31   /* Create vector with a single object in, and then remove that object.
  32      This test was added after a bug was discovered where unordered_remove
  33      would cause a self move assign.  If the C++ standard library is
  34      compiled in debug mode (by passing -D_GLIBCXX_DEBUG=1) and the
  35      operator= is removed from struct obj this test used to fail with an
  36      error from the C++ standard library.  */
  37   struct obj
  38   {
  39     std::vector<void *> var;
  40
  41     obj() = default;
  42
  43     /* gcc complains if we provide an assignment operator but no copy
  44        constructor, so provide one even if don't really care for this test.  */
  45     obj(const obj &other)
  46     {
  47       this->var = other.var;
  48     }
  49
  50     obj &operator= (const obj &other)
  51     {
  52       if (this == &other)
  53         error (_("detected self move assign"));
  54       this->var = other.var;
  55       return *this;
  56     }
  57   };
  58
  59   std::vector<obj> v;
  60   v.emplace_back ();
  61   auto it = v.end () - 1;
  62   unordered_remove (v, it);
  63   SELF_CHECK (v.empty ());
  64 }
  65
  66 } /* namespace vector_utils_tests */
  67 } /* amespace selftests */
  68
  69 void _initialize_vec_utils_selftests ();
  70 void
  71 _initialize_vec_utils_selftests ()
  72 {
  73   selftests::register_test
  74     ("unordered_remove",
  75      selftests::vector_utils_tests::unordered_remove_tests);
  76 }