gdb/testsuite/gdb.base/hw-sw-break-same-address.exp

   1 # Copyright 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
  16 # Test that inserting a hardware and a software breakpoint at the same
  17 # address behaves as expected.  GDB used to consider hw and sw
  18 # breakpoint locations as duplicate locations, which would lead to bad
  19 # behavior.  See PR gdb/25741.
  20
  21 if {[skip_hw_breakpoint_tests]} {
  22     return 0
  23 }
  24
  25 set test hbreak
  26 set srcfile ${test}.c
  27 if { [prepare_for_testing "failed to prepare" ${test} ${srcfile}] } {
  28     return -1
  29 }
  30
  31 if ![runto_main] {
  32     fail "can't run to main"
  33     return -1
  34 }
  35
  36 delete_breakpoints
  37
  38 gdb_test_no_output "set breakpoint always-inserted on"
  39 gdb_test_no_output "set breakpoint condition-evaluation host"
  40 gdb_test_no_output "set confirm off"
  41
  42 # Test inserting a hw breakpoint first, then a sw breakpoint at the
  43 # same address.
  44 with_test_prefix "hw-sw" {
  45     gdb_test "hbreak main" \
  46         "Hardware assisted breakpoint .* at .*" \
  47         "hbreak"
  48
  49     gdb_test "break main" \
  50         "Note: breakpoint .* also set at .*\r\nBreakpoint .* at .*" \
  51         "break"
  52
  53     # A bad GDB debugging against GDBserver would output a warning
  54     # here:
  55     #  delete breakpoints
  56     #  warning: Error removing breakpoint 3
  57     #  (gdb) FAIL: gdb.base/hw-sw-break-same-address.exp: hw-sw: delete breakpoints
  58     gdb_test_no_output "delete breakpoints"
  59 }
  60
  61 # Now the opposite: test inserting a sw breakpoint first, then a hw
  62 # breakpoint at the same address.
  63 with_test_prefix "sw-hw" {
  64     gdb_test "break main" \
  65         "Breakpoint .* at .*" \
  66         "break"
  67
  68     gdb_test "hbreak main" \
  69         "Note: breakpoint .* also set at .*\r\nHardware assisted breakpoint .* at .*" \
  70         "hbreak"
  71
  72     gdb_test_no_output "delete breakpoints"
  73 }