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ptid-selftests.c revision 1.1 
      1 /* Self tests for ptid_t for GDB, the GNU debugger.
      2 
      3    Copyright (C) 2017 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 "defs.h"
     21 #include "common/ptid.h"
     22 #include <type_traits>
     23 
     24 namespace selftests {
     25 namespace ptid {
     26 
     27 /* Check that the ptid_t class is POD.
     28 
     29    This is a requirement for as long as we have ptids embedded in
     30    structures allocated with malloc. */
     31 
     32 static_assert (std::is_pod<ptid_t>::value, "ptid_t is POD");
     33 
     34 /* We want to avoid implicit conversion from int to ptid_t.  */
     35 
     36 static_assert (!std::is_convertible<int, ptid_t>::value,
     37 	       "constructor is explicit");
     38 
     39 /* Build some useful ptids.  */
     40 
     41 static constexpr ptid_t pid = ptid_t (1);
     42 static constexpr ptid_t lwp = ptid_t (1, 2, 0);
     43 static constexpr ptid_t tid = ptid_t (1, 0, 2);
     44 static constexpr ptid_t both = ptid_t (1, 2, 2);
     45 
     46 /* Build some constexpr version of null_ptid and minus_one_ptid to use in
     47    static_assert.  Once the real ones are made constexpr, we can get rid of
     48    these.  */
     49 
     50 static constexpr ptid_t null = ptid_t::make_null ();
     51 static constexpr ptid_t minus_one = ptid_t::make_minus_one ();
     52 
     53 /* Verify pid.  */
     54 
     55 static_assert (pid.pid () == 1, "pid's pid is right");
     56 static_assert (lwp.pid () == 1, "lwp's pid is right");
     57 static_assert (tid.pid () == 1, "tid's pid is right");
     58 static_assert (both.pid () == 1, "both's pid is right");
     59 
     60 /* Verify lwp_p.  */
     61 
     62 static_assert (!pid.lwp_p (), "pid's lwp_p is right");
     63 static_assert (lwp.lwp_p (), "lwp's lwp_p is right");
     64 static_assert (!tid.lwp_p (), "tid's lwp_p is right");
     65 static_assert (both.lwp_p (), "both's lwp_p is right");
     66 
     67 /* Verify lwp.  */
     68 
     69 static_assert (pid.lwp () == 0, "pid's lwp is right");
     70 static_assert (lwp.lwp () == 2, "lwp's lwp is right");
     71 static_assert (tid.lwp () == 0, "tid's lwp is right");
     72 static_assert (both.lwp () == 2, "both's lwp is right");
     73 
     74 /* Verify tid_p.  */
     75 
     76 static_assert (!pid.tid_p (), "pid's tid_p is right");
     77 static_assert (!lwp.tid_p (), "lwp's tid_p is right");
     78 static_assert (tid.tid_p (), "tid's tid_p is right");
     79 static_assert (both.tid_p (), "both's tid_p is right");
     80 
     81 /* Verify tid.  */
     82 
     83 static_assert (pid.tid () == 0, "pid's tid is right");
     84 static_assert (lwp.tid () == 0, "lwp's tid is right");
     85 static_assert (tid.tid () == 2, "tid's tid is right");
     86 static_assert (both.tid () == 2, "both's tid is right");
     87 
     88 /* Verify is_pid.  */
     89 
     90 static_assert (pid.is_pid (), "pid is a pid");
     91 static_assert (!lwp.is_pid (), "lwp isn't a pid");
     92 static_assert (!tid.is_pid (), "tid isn't a pid");
     93 static_assert (!both.is_pid (), "both isn't a pid");
     94 static_assert (!null.is_pid (), "null ptid isn't a pid");
     95 static_assert (!minus_one.is_pid (), "minus one ptid isn't a pid");
     96 
     97 /* Verify operator ==.  */
     98 
     99 static_assert (pid == ptid_t (1, 0, 0), "pid operator== is right");
    100 static_assert (lwp == ptid_t (1, 2, 0), "lwp operator== is right");
    101 static_assert (tid == ptid_t (1, 0, 2), "tid operator== is right");
    102 static_assert (both == ptid_t (1, 2, 2), "both operator== is right");
    103 
    104 /* Verify operator !=.  */
    105 
    106 static_assert (pid != ptid_t (2, 0, 0), "pid isn't equal to a different pid");
    107 static_assert (pid != lwp, "pid isn't equal to one of its thread");
    108 static_assert (lwp != tid, "lwp isn't equal to tid");
    109 static_assert (both != lwp, "both isn't equal to lwp");
    110 static_assert (both != tid, "both isn't equal to tid");
    111 
    112 /* Verify matches against minus_one.  */
    113 
    114 static_assert (pid.matches (minus_one), "pid matches minus one");
    115 static_assert (lwp.matches (minus_one), "lwp matches minus one");
    116 static_assert (tid.matches (minus_one), "tid matches minus one");
    117 static_assert (both.matches (minus_one), "both matches minus one");
    118 
    119 /* Verify matches against pid.  */
    120 
    121 static_assert (pid.matches (pid), "pid matches pid");
    122 static_assert (lwp.matches (pid), "lwp matches pid");
    123 static_assert (tid.matches (pid), "tid matches pid");
    124 static_assert (both.matches (pid), "both matches pid");
    125 static_assert (!ptid_t (2, 0, 0).matches (pid), "other pid doesn't match pid");
    126 static_assert (!ptid_t (2, 2, 0).matches (pid), "other lwp doesn't match pid");
    127 static_assert (!ptid_t (2, 0, 2).matches (pid), "other tid doesn't match pid");
    128 static_assert (!ptid_t (2, 2, 2).matches (pid), "other both doesn't match pid");
    129 
    130 /* Verify matches against exact matches.  */
    131 
    132 static_assert (!pid.matches (lwp), "pid doesn't match lwp");
    133 static_assert (lwp.matches (lwp), "lwp matches lwp");
    134 static_assert (!tid.matches (lwp), "tid doesn't match lwp");
    135 static_assert (!both.matches (lwp), "both doesn't match lwp");
    136 static_assert (!ptid_t (2, 2, 0).matches (lwp), "other lwp doesn't match lwp");
    137 
    138 static_assert (!pid.matches (tid), "pid doesn't match tid");
    139 static_assert (!lwp.matches (tid), "lwp doesn't match tid");
    140 static_assert (tid.matches (tid), "tid matches tid");
    141 static_assert (!both.matches (tid), "both doesn't match tid");
    142 static_assert (!ptid_t (2, 0, 2).matches (tid), "other tid doesn't match tid");
    143 
    144 static_assert (!pid.matches (both), "pid doesn't match both");
    145 static_assert (!lwp.matches (both), "lwp doesn't match both");
    146 static_assert (!tid.matches (both), "tid doesn't match both");
    147 static_assert (both.matches (both), "both matches both");
    148 static_assert (!ptid_t (2, 2, 2).matches (both),
    149 	       "other both doesn't match both");
    150 
    151 
    152 } /* namespace ptid */
    153 } /* namespace selftests */
    154