mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-30 21:44:19 +08:00
248 lines
7.1 KiB
Plaintext
248 lines
7.1 KiB
Plaintext
# Copyright 2014-2016 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
|
|
|
|
standard_testfile
|
|
|
|
if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
|
|
return -1
|
|
}
|
|
|
|
if ![runto main] {
|
|
return -1
|
|
}
|
|
|
|
delete_breakpoints
|
|
|
|
# Probe for hardware stepping.
|
|
|
|
proc probe_target_hardware_step {} {
|
|
global gdb_prompt
|
|
|
|
set hw_step 0
|
|
|
|
gdb_test_no_output "set debug target 1"
|
|
set test "probe target hardware step"
|
|
gdb_test_multiple "si" $test {
|
|
-re "to_resume \\(\[^\r\n\]+, step, .*$gdb_prompt $" {
|
|
set hw_step 1
|
|
pass $test
|
|
}
|
|
-re "$gdb_prompt $" {
|
|
pass $test
|
|
}
|
|
}
|
|
gdb_test "set debug target 0" "->to_log_command.*\\).*"
|
|
return $hw_step
|
|
}
|
|
|
|
# Get the bounds of a function, and write them to FUNC_LO (inclusive),
|
|
# FUNC_HI (exclusive). Return true on success and false on failure.
|
|
proc get_function_bounds {function func_lo func_hi} {
|
|
global gdb_prompt
|
|
global hex decimal
|
|
|
|
upvar $func_lo lo
|
|
upvar $func_hi hi
|
|
|
|
set lo ""
|
|
set size ""
|
|
|
|
set test "get lo address of $function"
|
|
gdb_test_multiple "disassemble $function" $test {
|
|
-re "($hex) .*$hex <\\+($decimal)>:\[^\r\n\]+\r\nEnd of assembler dump\.\r\n$gdb_prompt $" {
|
|
set lo $expect_out(1,string)
|
|
set size $expect_out(2,string)
|
|
pass $test
|
|
}
|
|
}
|
|
|
|
if { $lo == "" || $size == "" } {
|
|
return false
|
|
}
|
|
|
|
# Account for the size of the last instruction.
|
|
set test "get hi address of $function"
|
|
gdb_test_multiple "x/2i $function+$size" $test {
|
|
-re ".*$hex <$function\\+$size>:\[^\r\n\]+\r\n\[ \]+($hex).*\.\r\n$gdb_prompt $" {
|
|
set hi $expect_out(1,string)
|
|
pass $test
|
|
}
|
|
}
|
|
|
|
if { $hi == "" } {
|
|
return false
|
|
}
|
|
|
|
# Remove unnecessary leading 0's (0x00000ADDR => 0xADDR) so we can
|
|
# easily do matches. Disassemble includes leading zeros, while
|
|
# x/i doesn't.
|
|
regsub -all "0x0\+" $lo "0x" lo
|
|
regsub -all "0x0\+" $hi "0x" hi
|
|
|
|
return true
|
|
}
|
|
|
|
# Get the address where the thread is currently stopped.
|
|
proc get_curr_insn {} {
|
|
global gdb_prompt
|
|
global hex
|
|
|
|
set pc ""
|
|
set test "get current insn"
|
|
gdb_test_multiple "p /x \$pc" $test {
|
|
-re " = ($hex)\r\n$gdb_prompt $" {
|
|
set pc $expect_out(1,string)
|
|
pass $test
|
|
}
|
|
}
|
|
|
|
return $pc
|
|
}
|
|
|
|
# Get the address of where a single-step should land.
|
|
proc get_next_insn {} {
|
|
global gdb_prompt
|
|
global hex
|
|
|
|
set next ""
|
|
set test "get next insn"
|
|
gdb_test_multiple "x/2i \$pc" $test {
|
|
-re "$hex .*:\[^\r\n\]+\r\n\[ \]+($hex).*\.\r\n$gdb_prompt $" {
|
|
set next $expect_out(1,string)
|
|
pass $test
|
|
}
|
|
}
|
|
|
|
return $next
|
|
}
|
|
|
|
set hw_step [probe_target_hardware_step]
|
|
|
|
if ![get_function_bounds "main" main_lo main_hi] {
|
|
# Can't do the following tests if main's bounds are unknown.
|
|
return -1
|
|
}
|
|
|
|
# Manually create a read-only memory region that covers 'main'.
|
|
gdb_test_no_output "mem $main_lo $main_hi ro" \
|
|
"create read-only mem region covering main"
|
|
|
|
# So that we don't fail inserting breakpoints on addresses outside
|
|
# main, like the internal event breakpoints.
|
|
gdb_test_no_output "set mem inaccessible-by-default off"
|
|
|
|
# So we get an immediate warning/error without needing to resume the
|
|
# target.
|
|
gdb_test_no_output "set breakpoint always-inserted on"
|
|
|
|
# Disable the automatic fallback to HW breakpoints. We want a
|
|
# software breakpoint to be attempted, and to fail.
|
|
gdb_test_no_output "set breakpoint auto-hw off"
|
|
|
|
# Confirm manual writes to the read-only memory region fail.
|
|
gdb_test "p /x *(char *) $main_lo = 1" \
|
|
"Cannot access memory at address $main_lo" \
|
|
"writing to read-only memory fails"
|
|
|
|
# Ensure that inserting a software breakpoint in a known-read-only
|
|
# region fails.
|
|
gdb_test "break *$main_lo" \
|
|
"Cannot insert breakpoint .*Cannot set software breakpoint at read-only address $main_lo.*" \
|
|
"inserting software breakpoint in read-only memory fails"
|
|
|
|
delete_breakpoints
|
|
|
|
set supports_hbreak 0
|
|
set test "probe hbreak support"
|
|
gdb_test_multiple "hbreak *$main_lo" $test {
|
|
-re "You may have requested too many.*$gdb_prompt $" {
|
|
pass "$test (no support)"
|
|
}
|
|
-re "No hardware breakpoint support.*$gdb_prompt $" {
|
|
pass "$test (no support)"
|
|
}
|
|
-re "$gdb_prompt $" {
|
|
pass "$test (support)"
|
|
set supports_hbreak 1
|
|
}
|
|
}
|
|
|
|
delete_breakpoints
|
|
|
|
# Check that the "auto-hw on/off" setting affects single-step
|
|
# breakpoints as expected, by stepping through the read-only region.
|
|
# If the target does hardware stepping, we won't exercise that aspect,
|
|
# but we should be able to step through the region without seeing the
|
|
# hardware breakpoint or read-only address errors.
|
|
proc test_single_step { always_inserted auto_hw } {
|
|
global gdb_prompt
|
|
global decimal
|
|
global hex
|
|
global supports_hbreak
|
|
global hw_step
|
|
|
|
gdb_test_no_output "set breakpoint always-inserted $always_inserted"
|
|
gdb_test_no_output "set breakpoint auto-hw $auto_hw"
|
|
|
|
# Get the address of the current instruction so we know where SI is
|
|
# starting from.
|
|
set curr_insn [get_curr_insn]
|
|
|
|
# Get the address of the next instruction so we know where SI should
|
|
# land.
|
|
set next_insn [get_next_insn]
|
|
|
|
set test "step in ro region"
|
|
gdb_test_multiple "si" $test {
|
|
-re "Could not insert hardware breakpoints.*$gdb_prompt $" {
|
|
gdb_assert {!$hw_step && $auto_hw == "on" && !$supports_hbreak} \
|
|
"$test (cannot insert hw break)"
|
|
}
|
|
-re "Cannot set software breakpoint at read-only address $next_insn.*$gdb_prompt $" {
|
|
gdb_assert {!$hw_step && $auto_hw == "off"} \
|
|
"$test (cannot insert sw break)"
|
|
}
|
|
-re "^si\r\nNote: automatically using hardware breakpoints for read-only addresses\.\r\n\(\?\:${hex}\[ \t\]\)\?${decimal}\[ \t\]+i = 0;\r\n$gdb_prompt $" {
|
|
gdb_assert {!$hw_step && $auto_hw == "on" && $supports_hbreak} \
|
|
"$test (auto-hw)"
|
|
}
|
|
-re "^si\r\n\(\?\:${hex}\[ \t\]\)\?${decimal}\[ \t\]+i = 0;\r\n$gdb_prompt $" {
|
|
gdb_assert {$hw_step || ($auto_hw == "on" && $supports_hbreak)} \
|
|
"$test (no error)"
|
|
}
|
|
}
|
|
|
|
gdb_test "maint info breakpoints 0" \
|
|
"No breakpoint or watchpoint matching '0'\." \
|
|
"single-step breakpoint is not left behind"
|
|
|
|
# Confirm the thread really advanced.
|
|
if {$hw_step || ($auto_hw == "on" && $supports_hbreak)} {
|
|
gdb_test "p /x \$pc" " = $next_insn" "thread advanced"
|
|
} else {
|
|
gdb_test "p /x \$pc" " = $curr_insn" "thread did not advance"
|
|
}
|
|
}
|
|
|
|
foreach always_inserted {"off" "on"} {
|
|
foreach auto_hw {"off" "on"} {
|
|
with_test_prefix "always-inserted $always_inserted: auto-hw $auto_hw" {
|
|
test_single_step $always_inserted $auto_hw
|
|
}
|
|
}
|
|
}
|