1 /* Self tests for gdbarch for GDB, the GNU debugger. 2 3 Copyright (C) 2017-2019 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 "common/selftest.h" 23 #include "selftest-arch.h" 24 #include "inferior.h" 25 #include "gdbthread.h" 26 #include "target.h" 27 #include "test-target.h" 28 #include "target-float.h" 29 #include "common/def-vector.h" 30 31 namespace selftests { 32 33 /* Test gdbarch methods register_to_value and value_to_register. */ 34 35 static void 36 register_to_value_test (struct gdbarch *gdbarch) 37 { 38 const struct builtin_type *builtin = builtin_type (gdbarch); 39 struct type *types[] = 40 { 41 builtin->builtin_void, 42 builtin->builtin_char, 43 builtin->builtin_short, 44 builtin->builtin_int, 45 builtin->builtin_long, 46 builtin->builtin_signed_char, 47 builtin->builtin_unsigned_short, 48 builtin->builtin_unsigned_int, 49 builtin->builtin_unsigned_long, 50 builtin->builtin_float, 51 builtin->builtin_double, 52 builtin->builtin_long_double, 53 builtin->builtin_complex, 54 builtin->builtin_double_complex, 55 builtin->builtin_string, 56 builtin->builtin_bool, 57 builtin->builtin_long_long, 58 builtin->builtin_unsigned_long_long, 59 builtin->builtin_int8, 60 builtin->builtin_uint8, 61 builtin->builtin_int16, 62 builtin->builtin_uint16, 63 builtin->builtin_int32, 64 builtin->builtin_uint32, 65 builtin->builtin_int64, 66 builtin->builtin_uint64, 67 builtin->builtin_int128, 68 builtin->builtin_uint128, 69 builtin->builtin_char16, 70 builtin->builtin_char32, 71 }; 72 73 /* Error out if debugging something, because we're going to push the 74 test target, which would pop any existing target. */ 75 if (current_top_target ()->stratum () >= process_stratum) 76 error (_("target already pushed")); 77 78 /* Create a mock environment. An inferior with a thread, with a 79 process_stratum target pushed. */ 80 81 test_target_ops mock_target; 82 ptid_t mock_ptid (1, 1); 83 inferior mock_inferior (mock_ptid.pid ()); 84 address_space mock_aspace {}; 85 mock_inferior.gdbarch = gdbarch; 86 mock_inferior.aspace = &mock_aspace; 87 thread_info mock_thread (&mock_inferior, mock_ptid); 88 89 scoped_restore restore_thread_list 90 = make_scoped_restore (&mock_inferior.thread_list, &mock_thread); 91 92 /* Add the mock inferior to the inferior list so that look ups by 93 target+ptid can find it. */ 94 scoped_restore restore_inferior_list 95 = make_scoped_restore (&inferior_list); 96 inferior_list = &mock_inferior; 97 98 /* Switch to the mock inferior. */ 99 scoped_restore_current_inferior restore_current_inferior; 100 set_current_inferior (&mock_inferior); 101 102 /* Push the process_stratum target so we can mock accessing 103 registers. */ 104 push_target (&mock_target); 105 106 /* Pop it again on exit (return/exception). */ 107 SCOPE_EXIT { pop_all_targets_at_and_above (process_stratum); }; 108 109 /* Switch to the mock thread. */ 110 scoped_restore restore_inferior_ptid 111 = make_scoped_restore (&inferior_ptid, mock_ptid); 112 113 struct frame_info *frame = get_current_frame (); 114 const int num_regs = gdbarch_num_cooked_regs (gdbarch); 115 116 /* Test gdbarch methods register_to_value and value_to_register with 117 different combinations of register numbers and types. */ 118 for (const auto &type : types) 119 { 120 for (auto regnum = 0; regnum < num_regs; regnum++) 121 { 122 if (gdbarch_convert_register_p (gdbarch, regnum, type)) 123 { 124 std::vector<gdb_byte> expected (TYPE_LENGTH (type), 0); 125 126 if (TYPE_CODE (type) == TYPE_CODE_FLT) 127 { 128 /* Generate valid float format. */ 129 target_float_from_string (expected.data (), type, "1.25"); 130 } 131 else 132 { 133 for (auto j = 0; j < expected.size (); j++) 134 expected[j] = (regnum + j) % 16; 135 } 136 137 gdbarch_value_to_register (gdbarch, frame, regnum, type, 138 expected.data ()); 139 140 /* Allocate two bytes more for overflow check. */ 141 std::vector<gdb_byte> buf (TYPE_LENGTH (type) + 2, 0); 142 int optim, unavail, ok; 143 144 /* Set the fingerprint in the last two bytes. */ 145 buf [TYPE_LENGTH (type)]= 'w'; 146 buf [TYPE_LENGTH (type) + 1]= 'l'; 147 ok = gdbarch_register_to_value (gdbarch, frame, regnum, type, 148 buf.data (), &optim, &unavail); 149 150 SELF_CHECK (ok); 151 SELF_CHECK (!optim); 152 SELF_CHECK (!unavail); 153 154 SELF_CHECK (buf[TYPE_LENGTH (type)] == 'w'); 155 SELF_CHECK (buf[TYPE_LENGTH (type) + 1] == 'l'); 156 157 for (auto k = 0; k < TYPE_LENGTH(type); k++) 158 SELF_CHECK (buf[k] == expected[k]); 159 } 160 } 161 } 162 } 163 164 } // namespace selftests 165 #endif /* GDB_SELF_TEST */ 166 167 void 168 _initialize_gdbarch_selftests (void) 169 { 170 #if GDB_SELF_TEST 171 selftests::register_test_foreach_arch ("register_to_value", 172 selftests::register_to_value_test); 173 #endif 174 } 175