1# Copyright 2014-2023 Free Software Foundation, Inc. 2 3# This program is free software; you can redistribute it and/or modify 4# it under the terms of the GNU General Public License as published by 5# the Free Software Foundation; either version 3 of the License, or 6# (at your option) any later version. 7# 8# This program is distributed in the hope that it will be useful, 9# but WITHOUT ANY WARRANTY; without even the implied warranty of 10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11# GNU General Public License for more details. 12# 13# You should have received a copy of the GNU General Public License 14# along with this program. If not, see <http://www.gnu.org/licenses/>. 15 16if {[skip_hw_breakpoint_tests]} { 17 return 0 18} 19 20standard_testfile 21 22if {[prepare_for_testing "failed to prepare" ${testfile} ${srcfile}]} { 23 return -1 24} 25 26if ![runto_main] { 27 return -1 28} 29 30# If we can read the memory at address 0, skip the test. 31if { [is_address_zero_readable] } { 32 untested "memory at address 0 is readable" 33 return 34} 35 36delete_breakpoints 37 38# Test whether the target supports hardware breakpoints at all. 39 40set supports_hbreak 0 41set test "probe hardware breakpoint support" 42gdb_test_multiple "hbreak -q main" $test { 43 -re "No hardware breakpoint support in the target.*$gdb_prompt $" { 44 pass $test 45 } 46 -re "Hardware breakpoints used exceeds limit.*$gdb_prompt $" { 47 pass $test 48 } 49 -re "Hardware assisted breakpoint.*at.* file .*$srcfile, line.*$gdb_prompt $" { 50 set supports_hbreak 1 51 pass $test 52 } 53} 54 55if {!$supports_hbreak} { 56 unsupported "hardware breakpoints" 57 return 58} 59 60delete_breakpoints 61 62# Force immediate breakpoint insertion. 63gdb_test_no_output "set breakpoint always-inserted on" 64 65# Hardware breakpoints are implemented using a mechanism that is not 66# dependent on being able to modify the target's memory, we should be 67# able to set them even in unmapped memory areas. 68gdb_test "hbreak *0" "Hardware assisted breakpoint \[0-9\]+ at 0x0" 69 70gdb_test "info break" "hw breakpoint.*y.*0x0\+\[ \t\]\+" \ 71 "info break shows hw breakpoint" 72 73gdb_test_no_output "delete \$bpnum" "" "delete" \ 74 "delete hw breakpoint" 75 76gdb_test "info break" "No breakpoints or watchpoints\." \ 77 "info break shows no breakpoints" 78