gdb/unittests/ptid-selftests.c

   1 /* Self tests for ptid_t for GDB, the GNU debugger.
   2
   3    Copyright (C) 2017-2024 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/ptid.h"
  21 #include <type_traits>
  22
  23 namespace selftests {
  24 namespace ptid {
  25
  26 /* Check that the ptid_t class is POD.
  27
  28    This is a requirement for as long as we have ptids embedded in
  29    structures allocated with malloc. */
  30
  31 static_assert (gdb::And<std::is_standard_layout<ptid_t>,
  32                         std::is_trivial<ptid_t>>::value,
  33                "ptid_t is POD");
  34
  35 /* We want to avoid implicit conversion from int to ptid_t.  */
  36
  37 static_assert (!std::is_convertible<int, ptid_t>::value,
  38                "constructor is explicit");
  39
  40 /* Build some useful ptids.  */
  41
  42 static constexpr ptid_t pid = ptid_t (1);
  43 static constexpr ptid_t lwp = ptid_t (1, 2, 0);
  44 static constexpr ptid_t tid = ptid_t (1, 0, 2);
  45 static constexpr ptid_t both = ptid_t (1, 2, 2);
  46
  47 /* Build some constexpr version of null_ptid and minus_one_ptid to use in
  48    static_assert.  Once the real ones are made constexpr, we can get rid of
  49    these.  */
  50
  51 static constexpr ptid_t null = ptid_t::make_null ();
  52 static constexpr ptid_t minus_one = ptid_t::make_minus_one ();
  53
  54 /* Verify pid.  */
  55
  56 static_assert (pid.pid () == 1, "pid's pid is right");
  57 static_assert (lwp.pid () == 1, "lwp's pid is right");
  58 static_assert (tid.pid () == 1, "tid's pid is right");
  59 static_assert (both.pid () == 1, "both's pid is right");
  60
  61 /* Verify lwp_p.  */
  62
  63 static_assert (!pid.lwp_p (), "pid's lwp_p is right");
  64 static_assert (lwp.lwp_p (), "lwp's lwp_p is right");
  65 static_assert (!tid.lwp_p (), "tid's lwp_p is right");
  66 static_assert (both.lwp_p (), "both's lwp_p is right");
  67
  68 /* Verify lwp.  */
  69
  70 static_assert (pid.lwp () == 0, "pid's lwp is right");
  71 static_assert (lwp.lwp () == 2, "lwp's lwp is right");
  72 static_assert (tid.lwp () == 0, "tid's lwp is right");
  73 static_assert (both.lwp () == 2, "both's lwp is right");
  74
  75 /* Verify tid_p.  */
  76
  77 static_assert (!pid.tid_p (), "pid's tid_p is right");
  78 static_assert (!lwp.tid_p (), "lwp's tid_p is right");
  79 static_assert (tid.tid_p (), "tid's tid_p is right");
  80 static_assert (both.tid_p (), "both's tid_p is right");
  81
  82 /* Verify tid.  */
  83
  84 static_assert (pid.tid () == 0, "pid's tid is right");
  85 static_assert (lwp.tid () == 0, "lwp's tid is right");
  86 static_assert (tid.tid () == 2, "tid's tid is right");
  87 static_assert (both.tid () == 2, "both's tid is right");
  88
  89 /* Verify is_pid.  */
  90
  91 static_assert (pid.is_pid (), "pid is a pid");
  92 static_assert (!lwp.is_pid (), "lwp isn't a pid");
  93 static_assert (!tid.is_pid (), "tid isn't a pid");
  94 static_assert (!both.is_pid (), "both isn't a pid");
  95 static_assert (!null.is_pid (), "null ptid isn't a pid");
  96 static_assert (!minus_one.is_pid (), "minus one ptid isn't a pid");
  97
  98 /* Verify operator ==.  */
  99
 100 static_assert (pid == ptid_t (1, 0, 0), "pid operator== is right");
 101 static_assert (lwp == ptid_t (1, 2, 0), "lwp operator== is right");
 102 static_assert (tid == ptid_t (1, 0, 2), "tid operator== is right");
 103 static_assert (both == ptid_t (1, 2, 2), "both operator== is right");
 104
 105 /* Verify operator !=.  */
 106
 107 static_assert (pid != ptid_t (2, 0, 0), "pid isn't equal to a different pid");
 108 static_assert (pid != lwp, "pid isn't equal to one of its thread");
 109 static_assert (lwp != tid, "lwp isn't equal to tid");
 110 static_assert (both != lwp, "both isn't equal to lwp");
 111 static_assert (both != tid, "both isn't equal to tid");
 112
 113 /* Verify matches against minus_one.  */
 114
 115 static_assert (pid.matches (minus_one), "pid matches minus one");
 116 static_assert (lwp.matches (minus_one), "lwp matches minus one");
 117 static_assert (tid.matches (minus_one), "tid matches minus one");
 118 static_assert (both.matches (minus_one), "both matches minus one");
 119
 120 /* Verify matches against pid.  */
 121
 122 static_assert (pid.matches (pid), "pid matches pid");
 123 static_assert (lwp.matches (pid), "lwp matches pid");
 124 static_assert (tid.matches (pid), "tid matches pid");
 125 static_assert (both.matches (pid), "both matches pid");
 126 static_assert (!ptid_t (2, 0, 0).matches (pid), "other pid doesn't match pid");
 127 static_assert (!ptid_t (2, 2, 0).matches (pid), "other lwp doesn't match pid");
 128 static_assert (!ptid_t (2, 0, 2).matches (pid), "other tid doesn't match pid");
 129 static_assert (!ptid_t (2, 2, 2).matches (pid), "other both doesn't match pid");
 130
 131 /* Verify matches against exact matches.  */
 132
 133 static_assert (!pid.matches (lwp), "pid doesn't match lwp");
 134 static_assert (lwp.matches (lwp), "lwp matches lwp");
 135 static_assert (!tid.matches (lwp), "tid doesn't match lwp");
 136 static_assert (!both.matches (lwp), "both doesn't match lwp");
 137 static_assert (!ptid_t (2, 2, 0).matches (lwp), "other lwp doesn't match lwp");
 138
 139 static_assert (!pid.matches (tid), "pid doesn't match tid");
 140 static_assert (!lwp.matches (tid), "lwp doesn't match tid");
 141 static_assert (tid.matches (tid), "tid matches tid");
 142 static_assert (!both.matches (tid), "both doesn't match tid");
 143 static_assert (!ptid_t (2, 0, 2).matches (tid), "other tid doesn't match tid");
 144
 145 static_assert (!pid.matches (both), "pid doesn't match both");
 146 static_assert (!lwp.matches (both), "lwp doesn't match both");
 147 static_assert (!tid.matches (both), "tid doesn't match both");
 148 static_assert (both.matches (both), "both matches both");
 149 static_assert (!ptid_t (2, 2, 2).matches (both),
 150                "other both doesn't match both");
 151
 152
 153 } /* namespace ptid */
 154 } /* namespace selftests */