gdb/gdbarch-selftests.c

   1 /* Self tests for gdbarch 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 #if GDB_SELF_TEST
  22 #include "selftest.h"
  23 #include "selftest-arch.h"
  24 #include "inferior.h"
  25
  26 namespace selftests {
  27
  28 /* A read-write regcache which doesn't write the target.  */
  29
  30 class regcache_test : public regcache
  31 {
  32 public:
  33   explicit regcache_test (struct gdbarch *gdbarch)
  34     : regcache (gdbarch, NULL, false)
  35   {
  36     set_ptid (inferior_ptid);
  37
  38     current_regcache.push_front (this);
  39   }
  40
  41   void raw_write (int regnum, const gdb_byte *buf) override
  42   {
  43     raw_set_cached_value (regnum, buf);
  44   }
  45 };
  46
  47 /* Test gdbarch methods register_to_value and value_to_register.  */
  48
  49 static void
  50 register_to_value_test (struct gdbarch *gdbarch)
  51 {
  52   const struct builtin_type *builtin = builtin_type (gdbarch);
  53   struct type *types[] =
  54     {
  55       builtin->builtin_void,
  56       builtin->builtin_char,
  57       builtin->builtin_short,
  58       builtin->builtin_int,
  59       builtin->builtin_long,
  60       builtin->builtin_signed_char,
  61       builtin->builtin_unsigned_short,
  62       builtin->builtin_unsigned_int,
  63       builtin->builtin_unsigned_long,
  64       builtin->builtin_float,
  65       builtin->builtin_double,
  66       builtin->builtin_long_double,
  67       builtin->builtin_complex,
  68       builtin->builtin_double_complex,
  69       builtin->builtin_string,
  70       builtin->builtin_bool,
  71       builtin->builtin_long_long,
  72       builtin->builtin_unsigned_long_long,
  73       builtin->builtin_int8,
  74       builtin->builtin_uint8,
  75       builtin->builtin_int16,
  76       builtin->builtin_uint16,
  77       builtin->builtin_int32,
  78       builtin->builtin_uint32,
  79       builtin->builtin_int64,
  80       builtin->builtin_uint64,
  81       builtin->builtin_int128,
  82       builtin->builtin_uint128,
  83       builtin->builtin_char16,
  84       builtin->builtin_char32,
  85     };
  86
  87   current_inferior()->gdbarch = gdbarch;
  88
  89   struct regcache *regcache = new regcache_test (gdbarch);
  90   struct frame_info *frame = create_test_frame (regcache);
  91   const int num_regs = (gdbarch_num_regs (gdbarch)
  92                         + gdbarch_num_pseudo_regs (gdbarch));
  93
  94   SELF_CHECK (regcache == get_current_regcache ());
  95
  96   /* Test gdbarch methods register_to_value and value_to_register with
  97      different combinations of register numbers and types.  */
  98   for (const auto &type : types)
  99     {
 100       for (auto regnum = 0; regnum < num_regs; regnum++)
 101         {
 102           if (gdbarch_convert_register_p (gdbarch, regnum, type))
 103             {
 104               std::vector<gdb_byte> expected (TYPE_LENGTH (type), 0);
 105
 106               if (TYPE_CODE (type) == TYPE_CODE_FLT)
 107                 {
 108                   DOUBLEST d = 1.25;
 109
 110                   /* Generate valid float format.  */
 111                   floatformat_from_doublest (floatformat_from_type (type),
 112                                              &d, expected.data ());
 113                 }
 114               else
 115                 {
 116                   for (auto j = 0; j < expected.size (); j++)
 117                     expected[j] = (regnum + j) % 16;
 118                 }
 119
 120               gdbarch_value_to_register (gdbarch, frame, regnum, type,
 121                                          expected.data ());
 122
 123               /* Allocate two bytes more for overflow check.  */
 124               std::vector<gdb_byte> buf (TYPE_LENGTH (type) + 2, 0);
 125               int optim, unavail, ok;
 126
 127               /* Set the fingerprint in the last two bytes.  */
 128               buf [TYPE_LENGTH (type)]= 'w';
 129               buf [TYPE_LENGTH (type) + 1]= 'l';
 130               ok = gdbarch_register_to_value (gdbarch, frame, regnum, type,
 131                                               buf.data (), &optim, &unavail);
 132
 133               SELF_CHECK (ok);
 134               SELF_CHECK (!optim);
 135               SELF_CHECK (!unavail);
 136
 137               SELF_CHECK (buf[TYPE_LENGTH (type)] == 'w');
 138               SELF_CHECK (buf[TYPE_LENGTH (type) + 1] == 'l');
 139
 140               for (auto k = 0; k < TYPE_LENGTH(type); k++)
 141                 SELF_CHECK (buf[k] == expected[k]);
 142             }
 143         }
 144     }
 145 }
 146
 147 } // namespace selftests
 148 #endif /* GDB_SELF_TEST */
 149
 150 void
 151 _initialize_gdbarch_selftests (void)
 152 {
 153 #if GDB_SELF_TEST
 154   register_self_test_foreach_arch (selftests::register_to_value_test);
 155 #endif
 156 }