gdb/testsuite/gdb.reverse/machinestate.exp

   1 # Copyright 2008-2023 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 # This file is part of the GDB testsuite.
  17 # This test tests the restoration of various kinds of machine state
  18 # to their original values by reverse execution.  We will execute
  19 # the program forward while it changes various types of data, and
  20 # then execute it backward to see if their values get restored.
  21 #
  22 # The types of machine state (data) that are tested are:
  23 #   register variable
  24 #   auto variable
  25 #   function static variable
  26 #   module static variable
  27 #   module global variable
  28 #
  29 # TODO:
  30 # various, possibly including...
  31 #   .bss variable, .data variable, ...
  32 #   shared library variable
  33 #   heap variable (pointer)...
  34 #   overlay variables...
  35 #   Test forward replay
  36 #
  37
  38 require supports_reverse
  39
  40 standard_testfile .c ms1.c
  41
  42 if { [prepare_for_testing "failed to prepare" $testfile \
  43           [list $srcfile $srcfile2]] } {
  44     return -1
  45 }
  46
  47 set newline "\[\r\n\]+"
  48
  49 set beginmain [gdb_get_line_number " begin main " $srcfile]
  50 set endmain   [gdb_get_line_number " end main "   $srcfile]
  51
  52 # Test begins
  53
  54 runto_main
  55
  56 if [supports_process_record] {
  57     # Activate process record/replay
  58     gdb_test_no_output "record" "turn on process record"
  59 }
  60
  61 # Proceed to end of main
  62
  63 gdb_test "break $endmain" \
  64     "Breakpoint.* file .*$srcfile, line $endmain.*" \
  65     "break at end of main"
  66 gdb_continue_to_breakpoint "end of main" ".*$srcfile:$endmain.*"
  67
  68 ###
  69 ###
  70 ###
  71
  72 # Now run backward to each of several points where data is changed.
  73 #
  74
  75 # Module global variable, reverse
  76 with_test_prefix "module global variable, reverse" {
  77     set breakloc [gdb_get_line_number \
  78                       "module_global_state: set breakpoint here" $srcfile]
  79
  80     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
  81     gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
  82
  83     gdb_test "print aglobal" " = 0"  "module global reverse-breakpoint"
  84     gdb_test "step"          " module global post-change .*"
  85     gdb_test "print aglobal" " = 1"  "module global forward past bp"
  86     gdb_test "reverse-step"  "$newline$breakloc.*"
  87     gdb_test "print aglobal" " = 0"  "module global reverse-step to bp"
  88 }
  89
  90 # Module static variable, reverse
  91 with_test_prefix "module static variable, reverse" {
  92     set breakloc [gdb_get_line_number \
  93                       "module_static_state: set breakpoint here" $srcfile]
  94
  95     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
  96     gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
  97
  98     gdb_test "print astatic" " = 0"  "module static reverse-breakpoint"
  99     gdb_test "step"          " module static post-change .*"
 100     gdb_test "print astatic" " = 1"  "module static forward"
 101     gdb_test "reverse-step"  "$newline$breakloc.*"
 102     gdb_test "print astatic" " = 0"  "module static reverse-step"
 103 }
 104
 105 # Function static variable, reverse
 106 with_test_prefix "function static variable, reverse" {
 107     set breakloc [gdb_get_line_number \
 108                       "function_static_state: set breakpoint here" $srcfile]
 109
 110     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
 111     gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
 112
 113     gdb_test "print a"      " = 0"  "function static reverse-breakpoint"
 114     gdb_test "step"         " function static post-change .*"
 115     gdb_test "print a"      " = 1"  "function static forward"
 116     gdb_test "reverse-step" "$newline$breakloc.*"
 117     gdb_test "print a"      " = 0"  "function static reverse-step"
 118 }
 119
 120 # Auto variable, reverse
 121 with_test_prefix "auto variable, reverse" {
 122     set breakloc [gdb_get_line_number \
 123                       "auto_state: set breakpoint here" $srcfile]
 124
 125     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
 126     gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
 127
 128     gdb_test "print a"      " = 0"  "auto var reverse-breakpoint"
 129     gdb_test "step"         " auto post-change .*"
 130     gdb_test "print a"      " = 1"  "auto var forward"
 131     gdb_test "reverse-step" "$newline$breakloc.*"
 132     gdb_test "print a"      " = 0"  "auto var reverse-step"
 133 }
 134
 135 # Register variable, reverse
 136 with_test_prefix "register variable, reverse" {
 137     set breakloc [gdb_get_line_number \
 138                       "register_state: set breakpoint here" $srcfile]
 139
 140     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
 141     gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
 142
 143     gdb_test "print a"      " = 0"  "register var reverse-breakpoint"
 144     gdb_test "step"         " register post-change .*"
 145     gdb_test "print a"      " = 1"  "register var step post-change"
 146     gdb_test "reverse-step" "$newline$breakloc.*"
 147     gdb_test "print a"      " = 0" \
 148         "register var reverse step-to, first time"
 149 }
 150
 151 # Proceed to beginning of main
 152
 153 gdb_test "tbreak $beginmain" "$srcfile, line $beginmain.*"
 154 gdb_test "reverse-continue"  "$srcfile:$beginmain.*" "reverse to main"
 155
 156 # Now repeat tests while replaying forward.
 157
 158 # Register variable, forward
 159
 160 with_test_prefix "register variable, forward" {
 161     set breakloc [gdb_get_line_number \
 162                       "register_state: set breakpoint here" $srcfile]
 163
 164     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
 165     gdb_test "continue"         "$srcfile:$breakloc.*" "forward to $breakloc"
 166
 167     gdb_test "print a"      " = 0"  "register var forward-breakpoint"
 168     gdb_test "reverse-step" "hide.*"
 169     gdb_test "step"         "$newline$breakloc.*" "step, 1"
 170     gdb_test "print a"      " = 0"  "register var forward step-to"
 171     gdb_test "step"         " register post-change .*" "step, 2"
 172     gdb_test "print a"      " = 1" \
 173         "register var step post-change, second time"
 174 }
 175
 176 # Auto variable, forward
 177 with_test_prefix "auto variable, forward" {
 178     set breakloc [gdb_get_line_number \
 179                       "auto_state: set breakpoint here" $srcfile]
 180
 181     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
 182     gdb_test "continue"         "$srcfile:$breakloc.*" "forward to $breakloc"
 183
 184     gdb_test "print a"      " = 0"  "auto var forward-breakpoint"
 185     gdb_test "reverse-step" "hide.*"
 186     gdb_test "step"         "$newline$breakloc.*" "step, 1"
 187     gdb_test "print a"      " = 0"  "auto var forward step-to"
 188     gdb_test "step"         " auto post-change .*" "step, 2"
 189     gdb_test "print a"      " = 1"  "auto var step post-change"
 190 }
 191
 192 # Function static variable, forward
 193 with_test_prefix "function static variable, forward" {
 194     set breakloc [gdb_get_line_number \
 195                       "function_static_state: set breakpoint here" $srcfile]
 196
 197     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
 198     gdb_test "continue"         "$srcfile:$breakloc.*" "forward to $breakloc"
 199
 200     gdb_test "print a"      " = 0"  "function static forward-breakpoint"
 201     gdb_test "reverse-step" "hide.*"
 202     gdb_test "step"         "$newline$breakloc.*" "step, 1"
 203     gdb_test "print a"      " = 0"  "function static forward step-to"
 204     gdb_test "step"         " function static post-change .*" "step, 2"
 205     gdb_test "print a"      " = 1"  "function static step post-change"
 206 }
 207
 208 # Module static variable, forward
 209 with_test_prefix "module static variable, forward" {
 210     set breakloc [gdb_get_line_number \
 211                       "module_static_state: set breakpoint here" $srcfile]
 212
 213     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
 214     gdb_test "continue"         "$srcfile:$breakloc.*" "forward to $breakloc"
 215
 216     gdb_test "print astatic" " = 0"  "module static forward-breakpoint"
 217     gdb_test "reverse-step"  "hide.*"
 218     gdb_test "step"          "$newline$breakloc.*" "step, 1"
 219     gdb_test "print astatic" " = 0"  "module static forward step-to"
 220     gdb_test "step"          " module static post-change .*" "step, 2"
 221     gdb_test "print astatic" " = 1"  "module static step post-change"
 222 }
 223
 224 # Module global variable, forward
 225 with_test_prefix "module global variable, forward" {
 226     set breakloc [gdb_get_line_number \
 227                       "module_global_state: set breakpoint here" $srcfile]
 228
 229     gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
 230     gdb_test "continue"         "$srcfile:$breakloc.*" "forward to $breakloc"
 231
 232     gdb_test "print aglobal" " = 0"  "module global forward-breakpoint"
 233     gdb_test "reverse-step"  "hide.*"
 234     gdb_test "step"          "$newline$breakloc.*" "step, 1"
 235     gdb_test "print aglobal" " = 0"  "module global forward step-to"
 236     gdb_test "step"          " module global post-change .*" "step, 2"
 237     gdb_test "print aglobal" " = 1"  "module global step post-change"
 238 }