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/* Self tests for gdbarch for GDB, the GNU debugger.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#if GDB_SELF_TEST
#include "selftest.h"
#include "selftest-arch.h"
#include "inferior.h"
#include "gdbthread.h"
#include "target.h"
namespace selftests {
/* A mock process_stratum target_ops that doesn't read/write registers
anywhere. */
static int
test_target_has_registers (target_ops *self)
{
return 1;
}
static int
test_target_has_stack (target_ops *self)
{
return 1;
}
static int
test_target_has_memory (target_ops *self)
{
return 1;
}
static void
test_target_prepare_to_store (target_ops *self, regcache *regs)
{
}
static void
test_target_store_registers (target_ops *self, regcache *regs, int regno)
{
}
class test_target_ops : public target_ops
{
public:
test_target_ops ()
: target_ops {}
{
to_magic = OPS_MAGIC;
to_stratum = process_stratum;
to_has_memory = test_target_has_memory;
to_has_stack = test_target_has_stack;
to_has_registers = test_target_has_registers;
to_prepare_to_store = test_target_prepare_to_store;
to_store_registers = test_target_store_registers;
complete_target_initialization (this);
}
};
/* Test gdbarch methods register_to_value and value_to_register. */
static void
register_to_value_test (struct gdbarch *gdbarch)
{
const struct builtin_type *builtin = builtin_type (gdbarch);
struct type *types[] =
{
builtin->builtin_void,
builtin->builtin_char,
builtin->builtin_short,
builtin->builtin_int,
builtin->builtin_long,
builtin->builtin_signed_char,
builtin->builtin_unsigned_short,
builtin->builtin_unsigned_int,
builtin->builtin_unsigned_long,
builtin->builtin_float,
builtin->builtin_double,
builtin->builtin_long_double,
builtin->builtin_complex,
builtin->builtin_double_complex,
builtin->builtin_string,
builtin->builtin_bool,
builtin->builtin_long_long,
builtin->builtin_unsigned_long_long,
builtin->builtin_int8,
builtin->builtin_uint8,
builtin->builtin_int16,
builtin->builtin_uint16,
builtin->builtin_int32,
builtin->builtin_uint32,
builtin->builtin_int64,
builtin->builtin_uint64,
builtin->builtin_int128,
builtin->builtin_uint128,
builtin->builtin_char16,
builtin->builtin_char32,
};
/* Error out if debugging something, because we're going to push the
test target, which would pop any existing target. */
if (current_target.to_stratum >= process_stratum)
error (_("target already pushed"));
/* Create a mock environment. An inferior with a thread, with a
process_stratum target pushed. */
test_target_ops mock_target;
ptid_t mock_ptid (1, 1);
inferior mock_inferior (mock_ptid.pid ());
address_space mock_aspace {};
mock_inferior.gdbarch = gdbarch;
mock_inferior.aspace = &mock_aspace;
thread_info mock_thread (&mock_inferior, mock_ptid);
scoped_restore restore_thread_list
= make_scoped_restore (&thread_list, &mock_thread);
/* Add the mock inferior to the inferior list so that look ups by
target+ptid can find it. */
scoped_restore restore_inferior_list
= make_scoped_restore (&inferior_list);
inferior_list = &mock_inferior;
/* Switch to the mock inferior. */
scoped_restore_current_inferior restore_current_inferior;
set_current_inferior (&mock_inferior);
/* Push the process_stratum target so we can mock accessing
registers. */
push_target (&mock_target);
/* Pop it again on exit (return/exception). */
struct on_exit
{
~on_exit ()
{
pop_all_targets_at_and_above (process_stratum);
}
} pop_targets;
/* Switch to the mock thread. */
scoped_restore restore_inferior_ptid
= make_scoped_restore (&inferior_ptid, mock_ptid);
struct frame_info *frame = get_current_frame ();
const int num_regs = (gdbarch_num_regs (gdbarch)
+ gdbarch_num_pseudo_regs (gdbarch));
/* Test gdbarch methods register_to_value and value_to_register with
different combinations of register numbers and types. */
for (const auto &type : types)
{
for (auto regnum = 0; regnum < num_regs; regnum++)
{
if (gdbarch_convert_register_p (gdbarch, regnum, type))
{
std::vector<gdb_byte> expected (TYPE_LENGTH (type), 0);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
DOUBLEST d = 1.25;
/* Generate valid float format. */
floatformat_from_doublest (floatformat_from_type (type),
&d, expected.data ());
}
else
{
for (auto j = 0; j < expected.size (); j++)
expected[j] = (regnum + j) % 16;
}
gdbarch_value_to_register (gdbarch, frame, regnum, type,
expected.data ());
/* Allocate two bytes more for overflow check. */
std::vector<gdb_byte> buf (TYPE_LENGTH (type) + 2, 0);
int optim, unavail, ok;
/* Set the fingerprint in the last two bytes. */
buf [TYPE_LENGTH (type)]= 'w';
buf [TYPE_LENGTH (type) + 1]= 'l';
ok = gdbarch_register_to_value (gdbarch, frame, regnum, type,
buf.data (), &optim, &unavail);
SELF_CHECK (ok);
SELF_CHECK (!optim);
SELF_CHECK (!unavail);
SELF_CHECK (buf[TYPE_LENGTH (type)] == 'w');
SELF_CHECK (buf[TYPE_LENGTH (type) + 1] == 'l');
for (auto k = 0; k < TYPE_LENGTH(type); k++)
SELF_CHECK (buf[k] == expected[k]);
}
}
}
}
} // namespace selftests
#endif /* GDB_SELF_TEST */
void
_initialize_gdbarch_selftests (void)
{
#if GDB_SELF_TEST
selftests::register_test_foreach_arch ("register_to_value",
selftests::register_to_value_test);
#endif
}
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