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# Copyright 2024 Free Software Foundation, Inc.
#
# 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/>.
#
# This file is part of the GDB testsuite.
# Test single stepping through MOPS (memory operations) instruction sequences.
require allow_aarch64_mops_tests
standard_testfile
if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} \
[list debug additional_flags=-march=armv9.3-a]] } {
return -1
}
# If the inferior is rescheduled to another CPU while a main or epilogue
# instruction is executed, the OS resets the inferior back to the prologue
# instruction, so we need to allow for that possibility.
proc step_through_sequence { prefix } {
set count 0
while { [is_at_instruction ${prefix}p] == 1 && $count < 50 } {
incr count
# The stepi output isn't useful to detect whether we stepped over
# the instruction.
gdb_test "stepi" "\[^\r\n\]+" "step over ${prefix}p"
if { [is_at_instruction ${prefix}m] == 1 } {
pass "stepped over ${prefix}p"
} else {
fail "stepped over ${prefix}e"
return 0
}
gdb_test "stepi" "\[^\r\n\]+" "step over ${prefix}m"
if { [is_at_instruction ${prefix}e] == 1 } {
pass "stepped over ${prefix}m"
} elseif { [is_at_instruction ${prefix}p] == 1 } {
# The inferior was rescheduled to another CPU.
pass "${prefix}m: reset back to prologue"
continue
} else {
fail "stepped over ${prefix}m"
return 0
}
gdb_test "stepi" "\[^\r\n\]+" "step over ${prefix}e"
if { [is_at_instruction prfm] == 1 } {
pass "stepped over ${prefix}e"
return 1
} elseif { [is_at_instruction ${prefix}p] == 1 } {
# The inferior was rescheduled to another CPU.
pass "${prefix}e: reset back to prologue"
continue
}
}
fail "step through $prefix sequence"
return 0
}
if ![runto_main] {
return -1
}
gdb_breakpoint ${srcfile}:[gdb_get_line_number "Break memset"]
gdb_breakpoint ${srcfile}:[gdb_get_line_number "Break memcpy"]
gdb_breakpoint ${srcfile}:[gdb_get_line_number "Break memmove"]
gdb_continue_to_breakpoint "memset breakpoint"
if { [arrive_at_instruction setp] } {
step_through_sequence set
}
gdb_continue_to_breakpoint "memcpy breakpoint"
if { [arrive_at_instruction cpyfp] } {
step_through_sequence cpyf
}
gdb_continue_to_breakpoint "memmove breakpoint"
if { [arrive_at_instruction cpyp] } {
step_through_sequence cpy
}
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