gdb/testsuite/gdb.base/hbreak-unmapped.exp

   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
  16 if {[skip_hw_breakpoint_tests]} {
  17     return 0
  18 }
  19
  20 standard_testfile
  21
  22 if {[prepare_for_testing "failed to prepare" ${testfile} ${srcfile}]} {
  23     return -1
  24 }
  25
  26 if ![runto_main] {
  27     return -1
  28 }
  29
  30 # If we can read the memory at address 0, skip the test.
  31 if { [is_address_zero_readable] } {
  32     untested "memory at address 0 is readable"
  33     return
  34 }
  35
  36 delete_breakpoints
  37
  38 # Test whether the target supports hardware breakpoints at all.
  39
  40 set supports_hbreak 0
  41 set test "probe hardware breakpoint support"
  42 gdb_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 $test
  52     }
  53 }
  54
  55 if {!$supports_hbreak} {
  56     unsupported "hardware breakpoints"
  57     return
  58 }
  59
  60 delete_breakpoints
  61
  62 # Force immediate breakpoint insertion.
  63 gdb_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.
  68 gdb_test "hbreak *0" "Hardware assisted breakpoint \[0-9\]+ at 0x0"
  69
  70 gdb_test "info break" "hw breakpoint.*y.*0x0\+\[ \t\]\+" \
  71     "info break shows hw breakpoint"
  72
  73 gdb_test_no_output "delete \$bpnum" "" "delete" \
  74     "delete hw breakpoint"
  75
  76 gdb_test "info break" "No breakpoints or watchpoints\." \
  77     "info break shows no breakpoints"