gdb/testsuite/gdb.base/watchpoints.exp

   1 # Copyright 2009-2024 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 # This file was written by Pierre Muller. (muller@ics.u-strasbg.fr)
  17
  18 # The allow_hw_watchpoint_tests checks if watchpoints are supported by the
  19 # processor.  On PowerPC, the check runs a small test program under gdb
  20 # to determine if the Power processor supports HW watchpoints.  The check
  21 # must be done before starting the test so as to not disrupt the execution
  22 # of the actual test.
  23
  24 set allow_hw_watchpoint_tests_p [allow_hw_watchpoint_tests]
  25
  26
  27 standard_testfile
  28
  29 set wp_set 1
  30
  31 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
  32     return -1
  33 }
  34
  35 with_test_prefix "before inferior start" {
  36     # Ensure that if we turn off hardware watchpoints and set a watch point
  37     # before starting the inferior the watchpoint created will not be a
  38     # hardware watchpoint.
  39     gdb_test_no_output "set can-use-hw-watchpoints 0" ""
  40     gdb_test "watch ival1" "Watchpoint \[0-9\]+: ival1" \
  41         "create watchpoint"
  42
  43     # The next tests are written to match the current state of gdb: access
  44     # and read watchpoints require hardware watchpoint support, with this
  45     # turned off these can't be created.
  46     gdb_test "awatch ival1" \
  47         "Can't set read/access watchpoint when hardware watchpoints are disabled." \
  48         "create access watchpoint"
  49     gdb_test "rwatch ival1" \
  50         "Can't set read/access watchpoint when hardware watchpoints are disabled." \
  51         "create read watchpoint"
  52 }
  53
  54     # This will turn hardware watchpoints back on and delete the watchpoint
  55     # we just created.
  56     clean_restart ${binfile}
  57
  58     # Disable hardware watchpoints if necessary.
  59     if {!$allow_hw_watchpoint_tests_p} {
  60         gdb_test_no_output "set can-use-hw-watchpoints 0" ""
  61     }
  62
  63     runto_main
  64     gdb_test "watch ival1" ".*" ""
  65     gdb_test "watch ival3" ".*" ""
  66
  67     set prev_timeout $timeout
  68     set timeout 600
  69
  70     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival1.*Old value = -1.*New value = 0.*ival1 = count; ival2 = count;.*" "watchpoint ival1 hit, first time"
  71
  72     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint ival3 hit, first time"
  73
  74     # Check that the ival3 hit count is reported correctly
  75     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "watchpoint hit count is 1"
  76
  77     # Continue until the next change for ival1, from 0 to 1.
  78     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival1.*Old value = 0.*New value = 1.*ival1 = count; ival2 = count;.*" "watchpoint ival1 hit, second time"
  79
  80     # Check that the hit count for ival1 is reported correctly
  81     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival1\r\n\[ \t]+breakpoint already hit 2 times.*" "watchpoint ival1 hit count is 2"
  82
  83     # Continue until the next change for ival3, from 0 to 1.
  84     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
  85
  86     # Check that the hit count is reported correctly
  87     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "watchpoint hit count is 2"
  88
  89     # Continue until the next change, from 1 to 2.
  90     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival1.*Old value = 1.*New value = 2.*ival1 = count; ival2 = count;.*" "watchpoint ival1 hit, third time"
  91
  92     # Check that the hit count is reported correctly
  93     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival1\r\n\[ \t]+breakpoint already hit 3 times.*" "watchpoint ival1 hit count is 3"
  94     # Disable ival1 watchpoint
  95     gdb_test_no_output "disable 2" ""
  96
  97     # Continue until the next change, from 1 to 2.
  98     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
  99
 100     # Check that the hit count is reported correctly
 101     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "watchpoint hit count is 3"
 102
 103     # Continue until the next change, from 2 to 3.
 104     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
 105
 106     # Check that the hit count is reported correctly
 107     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "watchpoint hit count is 4"
 108
 109     # Continue until the next change, from 3 to 4.
 110     # Note that this one is outside the loop.
 111
 112     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
 113
 114     # Check that the hit count is reported correctly
 115     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "watchpoint hit count is 5"
 116
 117 set timeout $prev_timeout