gdb/gdbarch-selftests.c

   1 /* Self tests for gdbarch for GDB, the GNU debugger.
   2
   3    Copyright (C) 2017-2022 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 "defs.h"
  21 #include "gdbsupport/selftest.h"
  22 #include "selftest-arch.h"
  23 #include "target.h"
  24 #include "test-target.h"
  25 #include "target-float.h"
  26 #include "gdbsupport/def-vector.h"
  27 #include "gdbarch.h"
  28 #include "scoped-mock-context.h"
  29
  30 namespace selftests {
  31
  32 /* Test gdbarch methods register_to_value and value_to_register.  */
  33
  34 static void
  35 register_to_value_test (struct gdbarch *gdbarch)
  36 {
  37   const struct builtin_type *builtin = builtin_type (gdbarch);
  38   struct type *types[] =
  39     {
  40       builtin->builtin_void,
  41       builtin->builtin_char,
  42       builtin->builtin_short,
  43       builtin->builtin_int,
  44       builtin->builtin_long,
  45       builtin->builtin_signed_char,
  46       builtin->builtin_unsigned_short,
  47       builtin->builtin_unsigned_int,
  48       builtin->builtin_unsigned_long,
  49       builtin->builtin_float,
  50       builtin->builtin_double,
  51       builtin->builtin_long_double,
  52       builtin->builtin_complex,
  53       builtin->builtin_double_complex,
  54       builtin->builtin_string,
  55       builtin->builtin_bool,
  56       builtin->builtin_long_long,
  57       builtin->builtin_unsigned_long_long,
  58       builtin->builtin_int8,
  59       builtin->builtin_uint8,
  60       builtin->builtin_int16,
  61       builtin->builtin_uint16,
  62       builtin->builtin_int32,
  63       builtin->builtin_uint32,
  64       builtin->builtin_int64,
  65       builtin->builtin_uint64,
  66       builtin->builtin_int128,
  67       builtin->builtin_uint128,
  68       builtin->builtin_char16,
  69       builtin->builtin_char32,
  70     };
  71
  72   scoped_mock_context<test_target_ops> mockctx (gdbarch);
  73
  74   struct frame_info *frame = get_current_frame ();
  75   const int num_regs = gdbarch_num_cooked_regs (gdbarch);
  76
  77   /* Test gdbarch methods register_to_value and value_to_register with
  78      different combinations of register numbers and types.  */
  79   for (const auto &type : types)
  80     {
  81       for (auto regnum = 0; regnum < num_regs; regnum++)
  82         {
  83           if (gdbarch_convert_register_p (gdbarch, regnum, type))
  84             {
  85               std::vector<gdb_byte> expected (TYPE_LENGTH (type), 0);
  86
  87               if (type->code () == TYPE_CODE_FLT)
  88                 {
  89                   /* Generate valid float format.  */
  90                   target_float_from_string (expected.data (), type, "1.25");
  91                 }
  92               else
  93                 {
  94                   for (auto j = 0; j < expected.size (); j++)
  95                     expected[j] = (regnum + j) % 16;
  96                 }
  97
  98               gdbarch_value_to_register (gdbarch, frame, regnum, type,
  99                                          expected.data ());
 100
 101               /* Allocate two bytes more for overflow check.  */
 102               std::vector<gdb_byte> buf (TYPE_LENGTH (type) + 2, 0);
 103               int optim, unavail, ok;
 104
 105               /* Set the fingerprint in the last two bytes.  */
 106               buf [TYPE_LENGTH (type)]= 'w';
 107               buf [TYPE_LENGTH (type) + 1]= 'l';
 108               ok = gdbarch_register_to_value (gdbarch, frame, regnum, type,
 109                                               buf.data (), &optim, &unavail);
 110
 111               SELF_CHECK (ok);
 112               SELF_CHECK (!optim);
 113               SELF_CHECK (!unavail);
 114
 115               SELF_CHECK (buf[TYPE_LENGTH (type)] == 'w');
 116               SELF_CHECK (buf[TYPE_LENGTH (type) + 1] == 'l');
 117
 118               for (auto k = 0; k < TYPE_LENGTH(type); k++)
 119                 SELF_CHECK (buf[k] == expected[k]);
 120             }
 121         }
 122     }
 123 }
 124
 125 } // namespace selftests
 126
 127 void _initialize_gdbarch_selftests ();
 128 void
 129 _initialize_gdbarch_selftests ()
 130 {
 131   selftests::register_test_foreach_arch ("register_to_value",
 132                                          selftests::register_to_value_test);
 133 }