1 /* Self tests for gdbarch for GDB, the GNU debugger.
3 Copyright (C) 2017 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
23 #include "selftest-arch.h"
25 #include "gdbthread.h"
27 #include "target-float.h"
31 /* A mock process_stratum target_ops that doesn't read/write registers
35 test_target_has_registers (target_ops *self)
41 test_target_has_stack (target_ops *self)
47 test_target_has_memory (target_ops *self)
53 test_target_prepare_to_store (target_ops *self, regcache *regs)
58 test_target_store_registers (target_ops *self, regcache *regs, int regno)
62 class test_target_ops : public target_ops
69 to_stratum = process_stratum;
70 to_has_memory = test_target_has_memory;
71 to_has_stack = test_target_has_stack;
72 to_has_registers = test_target_has_registers;
73 to_prepare_to_store = test_target_prepare_to_store;
74 to_store_registers = test_target_store_registers;
76 complete_target_initialization (this);
80 /* Test gdbarch methods register_to_value and value_to_register. */
83 register_to_value_test (struct gdbarch *gdbarch)
85 const struct builtin_type *builtin = builtin_type (gdbarch);
86 struct type *types[] =
88 builtin->builtin_void,
89 builtin->builtin_char,
90 builtin->builtin_short,
92 builtin->builtin_long,
93 builtin->builtin_signed_char,
94 builtin->builtin_unsigned_short,
95 builtin->builtin_unsigned_int,
96 builtin->builtin_unsigned_long,
97 builtin->builtin_float,
98 builtin->builtin_double,
99 builtin->builtin_long_double,
100 builtin->builtin_complex,
101 builtin->builtin_double_complex,
102 builtin->builtin_string,
103 builtin->builtin_bool,
104 builtin->builtin_long_long,
105 builtin->builtin_unsigned_long_long,
106 builtin->builtin_int8,
107 builtin->builtin_uint8,
108 builtin->builtin_int16,
109 builtin->builtin_uint16,
110 builtin->builtin_int32,
111 builtin->builtin_uint32,
112 builtin->builtin_int64,
113 builtin->builtin_uint64,
114 builtin->builtin_int128,
115 builtin->builtin_uint128,
116 builtin->builtin_char16,
117 builtin->builtin_char32,
120 /* Error out if debugging something, because we're going to push the
121 test target, which would pop any existing target. */
122 if (current_target.to_stratum >= process_stratum)
123 error (_("target already pushed"));
125 /* Create a mock environment. An inferior with a thread, with a
126 process_stratum target pushed. */
128 test_target_ops mock_target;
129 ptid_t mock_ptid (1, 1);
130 inferior mock_inferior (mock_ptid.pid ());
131 address_space mock_aspace {};
132 mock_inferior.gdbarch = gdbarch;
133 mock_inferior.aspace = &mock_aspace;
134 thread_info mock_thread (&mock_inferior, mock_ptid);
136 scoped_restore restore_thread_list
137 = make_scoped_restore (&thread_list, &mock_thread);
139 /* Add the mock inferior to the inferior list so that look ups by
140 target+ptid can find it. */
141 scoped_restore restore_inferior_list
142 = make_scoped_restore (&inferior_list);
143 inferior_list = &mock_inferior;
145 /* Switch to the mock inferior. */
146 scoped_restore_current_inferior restore_current_inferior;
147 set_current_inferior (&mock_inferior);
149 /* Push the process_stratum target so we can mock accessing
151 push_target (&mock_target);
153 /* Pop it again on exit (return/exception). */
158 pop_all_targets_at_and_above (process_stratum);
162 /* Switch to the mock thread. */
163 scoped_restore restore_inferior_ptid
164 = make_scoped_restore (&inferior_ptid, mock_ptid);
166 struct frame_info *frame = get_current_frame ();
167 const int num_regs = (gdbarch_num_regs (gdbarch)
168 + gdbarch_num_pseudo_regs (gdbarch));
170 /* Test gdbarch methods register_to_value and value_to_register with
171 different combinations of register numbers and types. */
172 for (const auto &type : types)
174 for (auto regnum = 0; regnum < num_regs; regnum++)
176 if (gdbarch_convert_register_p (gdbarch, regnum, type))
178 std::vector<gdb_byte> expected (TYPE_LENGTH (type), 0);
180 if (TYPE_CODE (type) == TYPE_CODE_FLT)
182 /* Generate valid float format. */
183 target_float_from_string (expected.data (), type, "1.25");
187 for (auto j = 0; j < expected.size (); j++)
188 expected[j] = (regnum + j) % 16;
191 gdbarch_value_to_register (gdbarch, frame, regnum, type,
194 /* Allocate two bytes more for overflow check. */
195 std::vector<gdb_byte> buf (TYPE_LENGTH (type) + 2, 0);
196 int optim, unavail, ok;
198 /* Set the fingerprint in the last two bytes. */
199 buf [TYPE_LENGTH (type)]= 'w';
200 buf [TYPE_LENGTH (type) + 1]= 'l';
201 ok = gdbarch_register_to_value (gdbarch, frame, regnum, type,
202 buf.data (), &optim, &unavail);
206 SELF_CHECK (!unavail);
208 SELF_CHECK (buf[TYPE_LENGTH (type)] == 'w');
209 SELF_CHECK (buf[TYPE_LENGTH (type) + 1] == 'l');
211 for (auto k = 0; k < TYPE_LENGTH(type); k++)
212 SELF_CHECK (buf[k] == expected[k]);
218 } // namespace selftests
219 #endif /* GDB_SELF_TEST */
222 _initialize_gdbarch_selftests (void)
225 selftests::register_test_foreach_arch ("register_to_value",
226 selftests::register_to_value_test);