1# Copyright 2014-2020 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 fail "can't run to main" 28 return -1 29} 30 31# If we can read the memory at address 0, skip the test. 32if { [is_address_zero_readable] } { 33 untested "memory at address 0 is readable" 34 return 35} 36 37delete_breakpoints 38 39# Test whether the target supports hardware breakpoints at all. 40 41set supports_hbreak 0 42set test "probe hardware breakpoint support" 43gdb_test_multiple "hbreak main" $test { 44 -re "No hardware breakpoint support in the target.*$gdb_prompt $" { 45 pass $test 46 } 47 -re "Hardware breakpoints used exceeds limit.*$gdb_prompt $" { 48 pass $test 49 } 50 -re "Hardware assisted breakpoint.*at.* file .*$srcfile, line.*$gdb_prompt $" { 51 set supports_hbreak 1 52 pass $test 53 } 54} 55 56if {!$supports_hbreak} { 57 unsupported "hardware breakpoints" 58 return 59} 60 61delete_breakpoints 62 63# Force immediate breakpoint insertion. 64gdb_test_no_output "set breakpoint always-inserted on" 65 66# Hardware breakpoints are implemented using a mechanism that is not 67# dependent on being able to modify the target's memory, we should be 68# able to set them even in unmapped memory areas. 69gdb_test "hbreak *0" "Hardware assisted breakpoint \[0-9\]+ at 0x0" 70 71gdb_test "info break" "hw breakpoint.*y.*0x0\+\[ \t\]\+" \ 72 "info break shows hw breakpoint" 73 74gdb_test_no_output "delete \$bpnum" "" "delete" \ 75 "delete hw breakpoint" 76 77gdb_test "info break" "No breakpoints or watchpoints\." \ 78 "info break shows no breakpoints" 79